bluuebunny/crossref_metadata_2025 huggingface dataset:
The Direct Solution on Normal Depth of an Egg-Shaped Section Tunnel
Authors: Wen Hui
Published: July 2014

An egg-shaped is consisted of four parts: One arc bottom, two side circular arc arch and one circular arc roof umbrella arch. It is complex shape. Aiming at traditional methods there are complicated and the defects of inaccurate. on the basis of summarizing the predecessors' research, Based on the normal water depth basic equation mathematical transformation of egg-shaped sections, the interrelation between dimensionless water depth and the dimensionless parameter were analyzed, We use the power function as the formula form, with minimum residual standard deviation as the goal, the coefficients of the formula can be calculated based on the theory of optimization and regression. Then, we get calculation formula for normal water depth. This formula is not a piecewise function, and need not to choose the suitable formula according to the dividing flow. The results can be directly calculated. Results of the example calculation and error analysis showed that the maximum relative error of normal water depth was 0.675% respectively in the utility range (The ratio of water depth divided by height of tunnel is from 0.05 to 0.85). Using this algorithm, above 92 % of the computation error on normal water depth was less than 0.25%. The average error of the formulas was not more than 0.118% .The hydraulic calculation formula will be widely used in engineering design and project management due to its high accuracy and simple form.
Mechanical Characteristics Analysis on Flexible Mattress in Downstream Sinking Based on Lumped Mass Method
Authors: Sun Zhi Hua , Cheng Man Ling
Published: July 2014

Downstream sinking technology of flexible mattress has wide application in erosion protection、berth firm and bank protection. During sinking of flexible mattress, the distance get gradually between the landing position of the mattress and the laying mattress ship, then the suspense length and mattress’s self-weight are also increase because of the ship’s move. Therefore the tension in mattress is also change continuously, so the calculation of the tension becomes difficult. By using lumped mass method, the mattress can be separated into several lumped mass which are connected using non-mass springs, with the laying distance increase, the length and self-weight of the mattress can be increase gradually, and according to forces equilibrium equation, the tension and profile of the mattress can be obtained.
Research on Navigable Ship Model Test in Curved Waterway
Authors: Wang Chang Hong , Cheng Xiao Bing
Published: July 2014

The flow of bend reach is complicated, which is difficulty for intersection of ship,and is accident prone. According to the lower reaches of the Hanjiang River MaKou reach of ship model test results, the relationship between channel width and flow are summarized when ship navigation sail in bend reach, which indicated that at approximately the same speed, navigation width of sailing through the bend upward are much smaller than down. As velocity or flow angle increases, the ship track width is broader, and channel width is also broader. the ship control and peer safety management points are forwarded in the lower reaches of Hanjiang river bend, which can provide reference for similar engineering designand research of waterway.
Data Assimilation of River Networks Using Extended Kalman Filter
Authors: Chen Yi Fan , Qian Jing Lin
Published: July 2014

In order to improve the accuracy of river network hydraulic model, extended kalman filter was used for real-time updating model states. In a simulation example of a river network composed of 14 channels, it systematically analyzed the effects of process and measurement noises on state correction. The results show that the extended kalman filter is able to effectively carry out data assimilation of non-linear river network system, and big process noise in combination with relatively small measurement noise is recommended for state correction.
Numerical Analysis of the Influences of Water Level on Seepage Stability of Tailing Dam
Authors: He Fang Ding , Cao Xue Feng , Yang Xia , Zhou Zhi Dong
Published: July 2014

Understanding the influences of water level on seepage stability of tailing bay is an important topics in hydraulic engineering design. The seepage stability of tailing bay under different water level was calculated with the numerical simulation software FLAC3D and the change laws of water pore pressure and saturation line in the dam was analyzed. The results show that the saturation line in the dam is a parabolic curve and the pore pressure changes in layers. With the increasing of water level, the saturation line in the heaping dam ups rather obviously while it is not obvious in the initial dam. The maximum pore pressure in the bottom of the dam increases with the relationship of water level up, the shallow of the saturation line is in the heaping dam heel.
Sensitivity Analysis of Concrete Face Rock-Fill Dam Parametric Based on the Intelligent Algorithm
Authors: Yan Qiao , Gao Zhan Hong , Song Zhi Cheng
Published: July 2014

Sensitivity analysis of model parameters is a rock fill parametric inversion analysis method to determine the unknown parameters. Traditional sensitivity analysis is basically a lot of trial or the method of single factor analysis based on a large amount of calculation, but, unable to reflect the real situation. The method of particle swarm optimization based on neural network based nonlinear mapping relationship between model parameters and displacement to finite element simulation of dam deformation. Basing on the orthogonal design, the methods of range analysis and variance analysis method were used for sensitivity analysis of the parameters of Duncan E-B model and the impact of various parameters on the dam displacement, and then it can be as the parameters of rock fill dam provide basis for determining the unknown parameters inversion.
Study on the Present Situation and Development of Groundwater Monitoring Technology
Authors: Guan Qing Hua , Li Fu Lin , Chen Xue Qun , Zhang Yu Feng , Tian Chan Juan
Published: July 2014

In order to investigate the groundwater level and quality, and study the groundwater contaminant in vertical and the dynamics relation in different aquifers, the place of sampling and monitoring need to be installed in the relevant position of the aquifers to differentiate groundwater from different aquifers. In recent years, groundwater monitoring and sampling system has made great progress, this paper focuses on the current study and development of groundwater monitoring well technology, and analyses the development and the applied direction of monitoring well technology from single-well monitoring to multi-level monitoring, which would provide scientific references for domestic related and groundwater contaminant.
3D Dynamic Numerical Simulation of Water Flow in Stilling Basin with Flaring Gate Pier
Authors: Qiu Chun , Liu Cheng Lan
Published: July 2014

3D numerical simulation is carried out for the water flow in stilling basin with X shaped flaring gate pier when the radial gate uses four different opening velocities. The space-time change law of hydraulic characteristics is obtained. The water level in the stilling basin is relatively higher while using lower opening velocities during the processes. The negative pressure exists on weir surface while the relative opening degree is less than 0.55; the maximal pressure on the slab of ogee section and stilling basin increases and moves to downstream with the gate opening. The results can provide important basis for shape optimization of practical engineering.
Joint Regulation and Storage of Surface Water and Groundwater in Rushan River Basin
Authors: Niu Ming Hui , Xu Zheng He , Wang Xi
Published: July 2014

Based on the regulating principles, the modes of joint regulation and storage of surface water and groundwater in Rushan River Basin are simulated using multi-objective programming method. The study suggests two modes as “two dry years and one normal year” and “four dry years and one wet year”. The results indicate the guarantee rates of water supply are improved, with increasing the exploitation quantity in dry years and the recharge in wet years. The study provides a strong guarantee for water resources regulation and promotes the sustainable development of regional water resources.
Comprehensive Evaluation for Utilization Efficiency of Rain-Flood Resources in Rushan River
Authors: Zhou Si Fang , Xu Zheng He , Yang Shan Shan , Kong Ke , Xiu Yuan
Published: July 2014

Using fuzzy mater-element method, the comprehensive utilization efficiency of rain-flood resources in Rushan River is assessed. The uncertainty of the comprehensive utilization efficiency is processed by the fuzzy principle. Then the representative indexes are selected, and the standard values of indexes are indicated. After normalization, the close degree and weight coefficient are calculated. On basis of that, the rating membership of the comprehensive utilization efficiency is for grade II, equal “good”. So the paper concludes that the utilization of rain-flood resources in Rushan River Basin is feasible and effective. It provides follow-up support for the research of the utilization of rain-flood resources.
Comparative Study on Design of Exposed Penstock Laid on Ground Using Chinese and American Specifications
Authors: Hu Lei , Wu He Gao , Shi Chang Zheng , Xie Ying Han
Published: July 2014

In this paper, differences by using selected three typical specifications—DL/T 5141-2001 (Chinese), ASCE No.79 in the version of 1993(American) and ASCE No.79 in the version of 2012 (American)—in structural design of exposed steel penstock were explored. A practical example about exposed penstock laid on ground applied in hydropower station was also used to analyze specifications clearly. The result shows that the main differences between Chinese and American specifications are allowable stress and load combination. The former is direct factor of calculating exposed penstock shell thickness. Therefore, ASCE No.79 (2012) designs the minimum wall thickness, followed by DL/T 5141-2001 and the last is ASCE No.79 (1993), which is correspondingly contrary to sort by allowable stress. Basically, ASCE No.79 (2012) defines lower safety coefficient for exposed penstock, which is identical with authoritative rules of pressure vessels in the U.S.A and EU. The safety of DL/T 5141-2001 has been proved via rich engineering experience and this specification is recommended for Chinese projects. Besides, ASCE No.79 (2012) is recommended.
Geo-Stress Direction Evaluation Method Based on Numerical Simulation
Authors: Xu Su Chao , Jin C Y.
Published: July 2014

The phenomenon of spalling at Baihetan Hydropower Station is influenced by such factors as the stress redistribution in surrounding rock, the local stress concentration and also poor properties of disturbed belt. In this paper, a series of numerical simulation were carried out and some beneficial conclusions were gained as follows: 1) the ratio of maximum shear stress and uniaxial compressive strength is more rational in the prediction of spalling and can give confident explanation for “V” shape pits; 2) the in-situ geo-stress direction is in accordance with NNE and NE.
Influence of the Bridge on the Flood Controlling in the River
Authors: Zhang Xin Zhou , Dou Xi Ping , Jiao Zeng Xiang , Song Yin Yan
Published: July 2014

It was convenient to go through the river after the building of bridge, but the flow water around the bridge can be influenced seriously. The level of water will become high and the velocity will reduce because of the influencing of resistance water by the bridge pier, and the level and the velocity of downstream water decreased. Between the bridge piers the velocity will increase where the water was extruded. All of these will have an effect to the safety of bridge and river flood controlling. In this paper, a 2D numerical model is established to simulate the variation of the level and velocity after the bridge was built, and to learn the effecting of the bridge on the flood controlling.
Simulation Study on Deposition Downstream Floodgates in Estuarine
Authors: Zhang Xin Zhou , Song Yin Yan , Chen Shao Ming
Published: July 2014

Siltation in the rivers downstream of floodgates is serious in China, making the discharge capacity of rivers decrease obviously and threatening the flood control in upper rivers. Tidal wave deformation is one conclusive dynamic factor leading to siltation downstream of floodgates in estuaries. A 2-D numerical model of tide and sediment transport is established to simulate the distribution of sediment siltation downstream of the floodgate, and several conclusions are obtained in this paper which can provide some theoretical basis for the prediction and analysis of the siltation characteristics in lower reach caused by floodgates in estuaries.
Study on Time Effect of Rock Fill Dam Seepage Line
Authors: Tao Xiu Yu , Xiang Dong , Sun Wei , Li Yong
Published: July 2014

In dam seepage line monitoring process, dam saturation line "inverted siphon" phenomenon appeared. In order to study the time effect, indoor model test were done. The dam seepage line rules and conditions were determined. The results show that when the reservoir water level dips, the dam seepage line with the decreasing of the water level will drop. But the changing has lagged far behind. Hysteresis and permeability dam, seepage path length, the upstream water level and other factors related to the rate of decline.
Temperature Rebound Influenced by Environment Temperature Analysis of the Irrigated Area of a High Arch Concrete Dam under Constrcution
Authors: Chen Xun Hui , Huang Yao Ying , Xu Bai Lin , Liu Dan Dan , Wei Xiao Bin
Published: July 2014

For a temperature rebound in the irrigated high arch dam during the construction period, using finite element method to research the influence of environment temperature to temperature rebound of the irrigated high concrete arch dam. Assuming that the initial temperature of the dam concrete is the joint grouting temperature. This paper presents a simulation of the temperature rebound of the high arch dam which is caused by the monthly average environment temperature, and performs sensitivity analysis to research the influence of thermal conductivity and surface heat preservation on the temperature rebound. According to the analysis,when the high arch dam sealing temperature is lower than the dam site annual average temperature, the dam site temperature inevitably would flow backward,slowly,to the irrigation area.The larger the thermal conductivity is,the quicker the temperature rebound speed will be. And benzene board insulation can reduce concrete temperature rebound rate, if the heat preservation benzene board is thicker,the temperature rebound rate is smaller.
Vibration Analysis and Human Comfort Evaluation of Underground Hydropower House
Authors: Fu Dan , Wu He Gao
Published: July 2014

Human comfort is of great importance to main powerhouse and vibration level should be controlled below the human comfort limit. Comparison of ISO2631/1-1985 and ISO2631/1-1997 was performed firstly in this study. It points out that weighted root-mean-square acceleration is basic variable for vibration evaluation. The reduced comfort boundary of 2 hours (0.260m/s2) in 1985 version is very close to the comfort threshold (0.315m/s2) in 1997 version. Above two values were selected as human comfort standard in this paper. After that, 3D dynamic finite element model of HongPing pumped storage station was established and vibration analysis under pressure fluctuations was conducted using time history method. The calculation results indicated that vibration of generator floor was mainly caused by the multiples of runner blade number frequency. Vibration level of generator floor would not lead to human discomfort.
Working Performance of Anti-Arch Segments on the Left Bank Slope of Xiangjiaba Gravity Dam
Authors: Zhou Qiu Jing , Gao Peng , Gong Zhao Guang , Li Hai Feng
Published: July 2014

The working performance of gravity dam with an anti-arch shape differs from that of conventional gravity dams. To understand the working performance of anti-arch segments on the bank slope of Xiangjiaba dam, linear and non-linear finite element methods were used to analyze the deformation, stress as well as the state of transverse joint and cracks during the operation period. The coefficient of anti-sliding stability of each dam segment and the safety degree of dam body were also calculated. The results show that under the conditions of non-grouting of transverse joints and well grouting of cracks, the deformation rules are consistent for all segments investigated and accord well with that of the conventional gravity dam. Both the dam heel and dam toe are subjected to compressive stress. In the cold seasons, there is a tensile stress region on the top of the dam body, where the tensile stress is smaller than the tensile strength. The transverse joints are opened, while the cracks are generally closed under compression and stable on the whole. The anti-sliding stability coefficient and the safety degree of each dam segment are above 3.0, which satisfies the design code.
Main Engineering Geological Problems and Evaluation on the Reservoir Engineering of Yellow River Water Diversion and Irrigation Area
Authors: Huang Zhi Quan , Chen Tai Li , Wang An Ming
Published: July 2014

Engineering geology survey was carried out on the reservoir engineering of Yellow River water diversion and irrigation area, main engineering geology problem including leakage problem of reservoir area、shore stable and siltation problem around the reservoir、siltation problem of storehouse district, connected the river course and the pilot, water leakage river course、earthquake liquefication and immerse and salinification were analyzed and appraised, the corresponding project measure was proposed against the infiltrates of the storehouse district.
Utilizing GIS in the Development of Water Quality River Modeling for Penchala River, Malaysia
Authors: Othman Faridah , Mohamed Elamin Alaa Eldin , Hezza Azahar Siti Azireen , Muhammad Siti Asiah
Published: July 2014

The quality of river water has been an important issue, due to its significant important function to the human being. In Asia, Malaysia is considered as one of the most speedily urbanizing countries and it’s facing huge environmental challenges. An increased pressure on urban areas has been generated by rapid manufacturing especially in the Penchala River Basin. Penchala River originates from Kiara Hill and passes through several important townships as it flows through residential and industrial areas before meeting with Klang River. Although the river is relatively short, with an approximately 12 km in length with a catchment area of 28 kilometer square, this catchment is noted to be under environmental stress emanating from storm water pollution, solid waste, sedimentation and micro-pollutant. To study the water pollution issue, it is always best if it is tied up with the geographic information system. The objective of this study is to use the GIS for preparing and organizing the geometric data to satisfy the water quality model requirements. As a result of this study, a digital map for Penchala River has been created.
Research on the Dam Foundation Stability and Reinforcement Measures of the 12th Sluice Section of Xiangjiaba Hydropower Station
Authors: Wang Xian Jun , Zhao Xiao Xi
Published: July 2014

By two-dimensional nonlinear finite element strength reserve coefficient method and the rigid body limit equilibrium method respectively, a comprehensive study of the stability of the 12th sluice section of XiangJiaba hydropower station is made and some conclusions of the instability mode and the lack of safety are reached. The reinforcement measures, which set up concrete cogging at the dam heel and put up additional drainage holes at the stilling basin,are proposed and calculated by the strength reserve coefficient method and the rigid body limit equilibrium method respectively again,Results show that the dam foundation safety meets the code’s standards if the . reinforcement measures are adopted.
Two-Dimensional Finite Element Analysis of Laboratory Seawall Model
Authors: Zhang Jian , Zhai Jian Feng , Wang Xian Mei , Chen Jie
Published: July 2014

Two-Dimensional finite element analysis was used to investigate the performance of seawall construction over weak subgrade soil using artificial base layer material consisted of cemented sand cushion comprising geosynthetics materials. Two types of base layer materials pure sand and cemented sand comprising husk rich ash and two types of geosynthetics materials geogrid and geotextile were used. Constitutive models were used to represent different materials in numerical analysis. The competence of two-dimensional numerical analysis was compared with experimental results. Numerical results showed a superior harmony with the experimental results. Finite element analysis model proved to be a great tool to determine the parameters that are difficult to measure in laboratory experiments. In addition, finite element analysis has the benefit of cost and time saving when compared to experimental investigation work. Numerical results showed strain induced in geosynthetics eliminated beyond a distance approximately equal six times of footing width.
Wave Kinematics and Pressure Field of Third-Order Theory for Bichromatic Bi-Directional Waves in Water of Finite Depth
Authors: Huang Hu , Li Guo Liang
Published: July 2014

Based on the third-order theory for bichromatic bi-directional waves in water of finite depth, a set of explicit formulas for the state-of-the art quantities of wave kinematics for horizontal and vertical particle displacements, velocities and accelerations, and wave pressure field is developed, and would be much more accurate and realistic in the design of harbor, coastal and offshore structures and their structural members.
Analysis of Gravity Foundation for Offshore Structure under Cyclic Loads
Authors: Gao Rui , Yang Ling Qiang , Wang Yan
Published: July 2014

Cyclic characteristic of offshore environmental load may cause the accumulation of foundation settlement and excess pore pressure in the subsoil. This may lead to conditions that jeopardize the structural stability and operability of the wind turbine. This paper discusses the analysis steps of the responses of non-cohesive subsoil under cyclic loads for a gravity base foundation system.
Research on New Type Quantitative Nondestructive Pre-Stress FRP Sheet Tension Fixture
Authors: Zhu Guang Shan , Bao Long Sheng , Guo Chao
Published: July 2014

Traditional pre-stress FRP sheet tension fixture must have the beam of the bridge slotted to reduce the cross-section of the beam. Besides, stress on the FRP sheet is irregular with local stress concentration. Its indirect load pre-stress, as well as quantitative criterion of pre-stress born by FRP sheet is not accurate. To solve the above problems, a newly-developed self-balanced type pre-stress FRP sheet tension fixture has been introduced. Such a tension fixture consists of welded steel frame, a mechanical jackscrew, a dynamometer and a strain gauge. It is able to give specified stress onto the FRP sheet accurately while not damaging the beam cross-section. At the same time, with the combination of ANASYS Workbench and UG8.0 Software, also states the simulation analysis of the new type tension fixture, including its stress under practical work and deformation state, which initially proves the scientific and economic usefulness of such tension fixtures.
Analysis on Lateral Deformation of High-Formwork in Different Column’s Spacing of Bridging
Authors: Liu Li , Wang Bo , Liu Ya Nan , Wang Ju Chao
Published: July 2014

Setting bracing is conducive to stabilize formwork support in high-formwork system. ABAQUS was used to build the calculating model of high-formwork system to simulate and analyse lateral deformation of high-formwork in different column’s spacing of bridging. The results show, increasing column’s spacing of bridging can add the whole lateral displacement of high-formwork, but, it is not obvious. Increasing appropriately column’s spacing can save material during construction.
Research on Influence of Concrete Pouring Sequence on Stability of High-Formwork Support System
Authors: Liu Li , Wang Ju Chao , Wang Bo , Liu Ya Nan
Published: July 2014

ANSYS finite element analysis software is used to simulate the changes of maximum lateral displacement of the high-formwork support system in different sequences of pouring concrete. In the condition of loading which was applied from one side to the other side, the maximum lateral displacement of the frame had a sudden increase in each loading process. In the condition of loading which was applied symmetrically, the maximum lateral displacement of the high-formwork steadily rising nearly straight with the load applied. So the symmetrical pouring concrete ways is better for the whole stability of the high-formwork.
The Integration of New Technology Research on Composite Inorganic Fiber Acoustic Insulation Spray in Engineering Construction
Authors: Shao Jun Yi , Wang Dong
Published: July 2014

Composite inorganic fiber spray technology was based on high-strength interfacial agent, then sprayed an appropriate mixed proportion of ultrafine diameter (D <4μm) composite inorganic fibers, adhesives, cement and other raw materials through a dedicated spray equipment on the building roof (ceiling) or flank, which formed a homogeneous, porous, durable and eco-friendly cover layer. The key technology is combined composite inorganic fiber sprays’ adhesive, mixing, porous, insulation and acoustic fireproof mechanism with three key technology working principles " high-strength interfacial agent sector coverage ", " composite inorganic fibers + adhesive multiple mixed spray " and " continuous overall seamless fireproof insulating layer ", to achieve integrate engineering effects of insulation, fastness, energy-efficient, sound-absorbing and homogeneous coverage. The new technology solves acoustic insulation problems of public buildings with fireproof requirements as: underground garage ceiling, elevator shafts and fire passage, etc.
Engineering Application of Precast Assembly Integral Shear Wall Structure on Housing Industrialization
Authors: Wang Yong , Zhang Yan Ni , Yang Feng , Xia Xiao Xi
Published: July 2014

With the implement of policies which are to accelerate the transformation of economic development mode and go to a new road of industrialization, the industrialization of residential construction has entered a new stage of development. This paper lists the structure engineering example which is Beijing holidays landscape D1、D8#floor and discusses the key technologies of engineering examples and application status of precast assembly integral shear wall structure in the residential industrial engineerings, then propose some difficulties and challenges in the process of the housing industrialization .
Features and Construction of Prefabricated Buildings
Authors: Zhao Yu Hong
Published: July 2014

Prefabricated buildings have the advantages of convenient construction, low cost, energy saving and environmental protection, etc., it is suitable for industrial production of buildings, lifting and connections of prefabricated components are key to construct the prefabricated buildings.
Mold-Unloading-Lifting and Lifting-Transportation's Construction Checking of Composite Wallboard in Industrial Production
Authors: Xu Chun Yi , Yan Lei , Xu Chun Lei , Jiang Shi Kai
Published: July 2014

Take composite wallboard of residential parts as object of study, use investigation and theoretical calculation to check unfavorable conditions of Mold-unloading-lifting and lifting-transportation in industrial production. mold-unloading coefficient and dynamic coefficient value are researched according to summarize domestic and foreign standard, and give out suggested dynamic coefficient values of construction checking of lifting-transportation for composite wallboard. It can provide reference of production and development of residential parts.
Construction Technology of High-Rise Building Structure
Authors: Cheng Peng , Chen Xin Fu , Wu Lang
Published: July 2014

The construction of high-rise building has a lot of features such as large capital investments, narrow operation face and long construction period. This puts forward higher requirements for technology. Characteristics of high-rise building construction, the construction quality controlling and construction safety managements were analyzed in this paper.
The Countermeasures on Temperature and Shrinkage Crack of Mass Concrete
Authors: Zheng Xian Chun , Li Peng Fei , Sun Si Zhong
Published: July 2014

Combined with practical engineering，this paper analyzes the mechanism of mass concrete temperature and shrinkage cracks, from raw material selection, structure design, construction, monitoring and management five aspects,the author respectively gives the countermeasures on temperature and shrinkage crack of mass concrete, reference for engineers.
Emergency Supply of Drinking Water
Authors: Teichmann Marek , Kuda František , Proske Zbyněk
Published: July 2014

The article deals with the ways of dealing with the concept of drinking water supply in the event of emergencies and crisis situations. The contribution defines concepts related to crisis planning, describes preventive measures to ensure a prompt resolution of a situation, solution to minimize the damage caused by the incident and, last but not least, the possible ways of ensuring the supply of drinking water in emergency situations.
3-D Numerical Study of Mechanical Behaviors of Pile-Anchor System
Authors: Liu Ri Cheng , Xu Bang Shu , Li Bo , Jiang Yu Jing
Published: July 2014

Mechanical behaviors of pile-soil effect and anchor-soil effect are significantly important in supporting engineering activities of foundation pit. In this paper, finite difference method (FDM) was utilized to perform the numerical simulation of pile-anchor system, composed of supporting piles and pre-stressed anchor cables. Numerical simulations were on the basis of the foundation pit of Jinan’s West Railway Station, and 3D simulation analysis of foundation pit has been prepared during the whole processes of excavation, supporting and construction. The paper also analyzed the changes of bending moments of piles and axial forces of cables, and discussed mechanical behaviors of pile-anchor system, through comparisons with field monitoring. The results show that the parameters concluding vertical gridding’s number, cohesion of pile and soil, and pile stiffness have robust influences on supporting elements’ behaviors. Mechanical behaviors of supporting pile and axial forces of anchor cable changed dramatically, indicating that the potential failure form was converted from toppling failure to sliding failure.
Choosing an Optimal Trenchless Renovation Method for Pressure and Non-Pressure Pipes
Authors: Orlov Vladimir , Averkeev Ilya
Published: July 2014

The paper presents the innovative decision of the problem of choosing the most effective pipe renovation method among the wide range of them. To solve this problem a computer program called “Repair 2012” was developed. The factors influencing the selection process of optimal renovation method for pressure and non-pressure pipes and the theoretical base for creating a computer program are described. The program algorithm based on weighted analysis of these factors. Weighting coefficients for each factor are calculated using arithmetical mean for all concerning trenchless methods. The income and outcome user information, the sequence of the process of working with the program are represented in the article. The process and results on determining an optimal renovation method are shown as an example.
The Selection of Priority Pipe Sections for Sewer Network Renovation
Authors: Orlov Vladimir , Andrianov Alexey
Published: July 2014

Operative and planned rehabilitation of old pipe networks, including water disposal systems, is a relevant objective of modern city. It is especially difficult to make pipeline reconstruction works in large cities with high construction area density, transport moving intensity, also full of multifunctional both underground and above-ground infrastructure. All these factors set a lot of restrictions for open excavation methods of pipelines repair and reconstruction. That is the reason why trenchless technologies are becoming more popular among the engineers. A wide range of trenchless techniques provides people with convenient method of fast and effective reconstruction processes in comparison with durable and inconvenient open excavation. This fact leads to a necessity of creating a strategic planning of pipeline rehabilitation. This article presents how to operate the first step of such strategic planning – choosing the priority pipe section for sewer network renovation. The most convenient way for choosing one specific section from a great range is to use a program package based on mathematical algorithm that takes into account a quantity of different factors. This paper presents such a program created by authors and describes its interface, date input and processing.
The Water Usage Method and Spatial Structure Type of Spring Village in Northern China
Authors: Kong Ya Wei
Published: July 2014

Spring village is a widely existing type of human settlement in northern China, the spring water usage with natural environment is the main factor of the heterogeneous spatial structure in spring village. By the analysis for hierarchically usage of multi-kind values, this paper introduces the spatial structure and feature of typical villages under the views of living, manufacture, ecology and landscape. Meanwhile, based on the combination of modern function requirement and spring water usage, the settlement-spatial conservation, which relies on natural environment, is seen as the essential way for the sustainable development of spring settlement.
Analysis of Influence Factors on the Internal-Melt Ice-on-Tube while Melting
Authors: Liu Yi
Published: July 2014

The numerical simulation is widely used in study of the ice storage system. The model about melting is established and solved by using enthalpy method. Natural convection of the melted water in the course of melting is studied. Effects on the performance of heat-exchange, caused by variation of velocity of the refrigerant, inner diameter of the tube, initial temperature of the external water and inlet temperature of the refrigerant, are simulated and analyzed. 1. As the increase of cryogen inlet temperature, the influence of natural convention is more and more in the process of melting heat transfer. 2. Under the conditions of the different cryogen velocity, the different diameter of tube and the different initial temperature of ice layer, the effect of natural convention also is different in the process of melting heat transfer.
Calculation of the Maximum Length of the Directly Buried Cooling Pipes Applied in the District Cooling System (DCS)
Authors: Tan Chao Yi , Hu Hai Hua , Wang Meng Meng , Pan Zhen Zhen , Wang Han Qing
Published: July 2014

Formula of the maximum length of direct burial cooling pipes used in the district cooling system (DCS) was derived, by means of establishing the mathematical relationship between the maximum temperature rise of the pipe, under which the energy efficiency of the refrigeration unit would not decrease, and the thermal equilibrium of the pipe. And an engineering application with DCS in Zhuzhou was analyzed. The results showed that the insulation measures should be applied to the directly buried cooling pipes in engineering applications, appropriately with a thermal insulation layer of 0.04m.
Discussion on Ventilation Requirement for Meeting Indoor Air Quality
Authors: Lin Meng Jie , Liu Qin Qin , Peng Zi Mao
Published: July 2014

Based on the calculation method and the analysis method of the ventilation requirement, the paper discussed the necessary ventilation referring to the standard of the allowed indoor CO2concentration, the necessary ventilation with oxygen as the standard and the calculation method and correction method of the full amount of required ventilation to remove the waste heat or wet. According to the pros and cons of the methods described above, the paper proposed the corresponding countermeasures to meet the indoor air quality and the fresh air needed by indoor personnel.
“Breathing House” – New Air System for Healthy Residential Buildings
Authors: Dong Tie Xin , Yan Zhen Yu
Published: July 2014

As the continual improvement of human living standards, healthy housing became a hot topic and was attached more and more emphasis whatever from the profession or the public. Professionally, better ventilation is one of the most important facets of the healthy housing. Compared with the traditional ventilation system, this paper illustrates the new air system that makes a full use of natural resources, directly and simply changes the normal traditional housing to the healthy housing, through the concept, philosophy, typology and property of the new air system. Additionally, it takes the "Dong Ya Shi Ji Cheng" in Batou as typical example of healthy housing, in order to demonstrates the advantages of the new air system more clearly.
Optimization of Acid Fracturing Design in Yubei Fractured Reservoir
Authors: Song Li Yang , He Xiao Ru , Zhang Ji Cheng
Published: July 2014

This paper recommends the application of acidic fracturing technology for horizontal wells in Yubei region basing on its fractured reservoir’s characteristics, and the numerical simulation method is used to optimize the parameters of acidic fracturing. According to the results of optimization, the proper acid system is selected, and the construction parameters of acidic fracturing are optimized. According to the results of numerical simulation, we recommend the fracture half-length to be 120m, the fracture conductivity to be 30D.cm, and the fracture number to be 5. According to the properties of reservoir in Yubei region and the optimization results of fracture half-length and fracture conductivity, the alternative injection of crosslinked acid and ordinary gelled acid is recommend. The injection rate of crosslinked acid is 5m3/min, with volume 300m3. The injection rate of ordinary gelled acid is 6m3/min, with volume 300m3.
Experimental Study of Self-Suction Spraying with Pressure Gas and Water
Authors: Ma Zhong Fei , Lin Guang Rong , Zhang Zhen , Xie Hong Ling
Published: July 2014

In order to find out the factors influencing self-suction spraying with pressure gas and water performance, the working principle of the spray was analyzed, orthogonal experiments were conducted, in which influenced of different air flow, bronchia-nozzle distance, nozzle diameter as well as the diffusion angle on the effective rang and spray particle size were tested, the optimal matching of parameters was obtained. The results showed that, the optimal configuration parameters could be obtained by orthogonal test of self-suction spraying with pressure gas and water, to provide data support for the design of efficient spraying device.
Adsorption Research of Polymer on Oil Sands in Qidongyi Block of Xinjiang Conglomerate Reservoir
Authors: Nie Xiao Bin , Guo Ying , Lou Qing Xiang , Liu Wei Dong , Sun Ling Hui , Li Ji Ye
Published: July 2014

In the process of polymer flooding in porous media, polymer was detained due to interactions between surface adsorption and polymer molecules, and this could lead to negative effects on oil displacement. For polymer adsorption in Xinjiang conglomerate reservoir, HPLC analysis was adopted to study the static and dynamic laws. Results have showed that the adsorption process could be divided into 3 stages: rapid growth, slow growth and stable state. With the loss of polymer molecular weight, equilibrium adsorption quantity reduces gradually. The adsorption amount is different for the same polymer on four types of oil sands. For equilibrium adsorption, the maximum value is argillaceous sandstone, followed by conglomeratic sandstone.The third is argillaceous gravel, and the minimum is sand gravel. For polymer flooding in conglomerate cores, the dynamic retention amount of seriate conglomerate is much greater than that of fine particle conglomerate. These data have provided reference for project design of polymer flooding in conglomerate reservoir.
Industry Clusters Innovation Action Model Based on the CAS Theory – Shanxi Magnesium Industry
Authors: Luo Fu Zhou , Liu Shu Ling
Published: July 2014

Based on complex adaptive systems (CAS) theory, using the method of case studies to explore the Shaanxi Province magnesium industry cluster knowledge innovation behavior. Based on the complexity stimulus—response rules, build the knowledge innovation system of metallic magnesium industry cluster main body behavior patterns; Based on complex adaptive - learning, building the overall behavior pattern of magnesium metal industry cluster knowledge innovation system; and based on the complex level—emerge theory, build the magnesium industry cluster evolution behavior pattern of knowledge innovation system. Use CAS theory to solve the problem of knowledge innovation in industrial cluster, which offers a basis for realize the sustainable and health development of industry cluster better.
Research on Construction Technology of the High Permeability Type Layer-Penetration Oil Production
Authors: Hu Gang
Published: July 2014

Current specification, does not specify the full construction process. In practice, the majority of construction units according to their own experience, hard to get reliable assurance of construction quality. In the early development of new and the high permeability type layer-penetration oil on the basis of construction of the test section of this article relies on permeable layer, oil on high permeable layer construction process, quality testing, and control indicators complete process was studied, test construction and achieved good results.
Research on High Permeability Layer-Penetration Oil Production
Authors: Guan Qin
Published: July 2014

Domestic and foreign road construction for many years of practical experience shows that pavement early damage and between the base and the surface layer of oil related to the quality of construction, the quality of life of the future road surface layer has a major influence[1]. In order for the preparation of high-permeable dialysis oils heavy investment in production, combined with permeable layer of oil in the production of enterprises, taking into account the conditions and existing equipment of enterprises, the paper layer on oil production, put forward the requirements for equipment, processing parameters, control indicators.
The Influences and the Mechanism of Action of Grinding Aid Agent during Micro Fine Particle of Lean Hematite Ore of Grinding Operation
Authors: Liang Bing , Zhang Jin Rui , Han Miao Miao , Zhao Li Bing
Published: July 2014

In this paper, the effect of citric acid on the hematite was studied and the mechanism was analyzed. The results indicated that under the condition of the optimal grinding medium, compared with the result without citric acid added, with citric acid added at the mass of 0.10% of the hematite, the content of-0.074mm of grinding production was increased by 7.11%; physical adsorption and chemical adsorption which were on the surface of hematite produced by citric acid can reduce viscosity of grinding pulp, change surface potential of the hematite, and reduce the hardness on the surface of the hematite. Therefore citric acid can improve the grinding efficiency of the hematite.
Mechanical Properties and Calculation Method for Monolayer Cable Net Glass Curtain Wall under Fire Conditions
Authors: Gong Ling Feng , Bai Yin , Li Si Qi
Published: July 2014

The developing trend of large scale curtain wall structure system is monolayer cable net glass curtain wall, so it’s important and necessary to study the corresponding calculation method and mechanical properties under fire conditions. The changing rule of the displacement and the maximum cable force with the temperature was analyzed by making series of numerical calculations, and the principle for determining critical temperature was deeply discussed upon the basis of the numerical simulation results. The critical temperature table considering different spans, grid dimensions and cable diameters is given, and the influence on critical temperature has also been studied when initial prestressed force of vertical cable is relatively small. Some suggestions are proposed finally.
Study on Ignition Time of Radiation Cargo in Irradiation Room under Stuck Radioactive Sources
Authors: Yao Xiao Lin
Published: July 2014

Ignition temperatures of common radiation cargo in irradiation room were measured through the experiments, minimum ignition temperature is 210 °C. In order to discuss the temperature variation and temperature field under stuck radioactive sources, the fire scenario was presented and simulated by FDS. The results show that temperatures rise rapidly when stuck radioactive source broke out within an hour. As the growth of the time, temperatures in irradiation room are rising, but the rising rate is slowing. The temperature field in the irradiation room tends to be the same after three hours. The stuck radioactive source occurred after 2.4 days later, local temperatures can reach 210 °C, and radiation cargo may be ignited.
Review of Different Methodologies and Risk Assessment Models Instorm Surge Disaster Management
Authors: Liu Qiang , Yang Shuo
Published: July 2014

Storm surge causes severe casualties and commercial losses to the habitant living within the range of it frequently, and has been one of the most harmful and prevailing hazards that attacks coastal areas. This paper is dedicated to reviewing and analyzing the methodologies and models that are generally used to assess the storm surge risk. Firstly, by means of analyzing the existing models of hazard risk assessment, indicating the purpose, process and methodologies. Secondly based on the analysis a comparison of the basic profile has taken into practice, and the advantages and limitations of the models are discussed. Finally, associating with the impacts of storm surges that affect China, we bring up a research direction that leads to further studies.
A Forecast and Risk Assessment Model for Storm Surge Impacts
Authors: Zhang Ling , Liu Qiang , Yang Shuo
Published: July 2014

A new approach to risk assessment of storm surge and prediction problems was suggested. The model is based on the Extended Kalman Filter (EKF) equations, which simply linearises all nonlinear models so that the traditional Kalman filter can be applied. Key factors describing storm surge disasters are considered in the model. Numerical simulations were carried out and tested with some actual observations of recent storm surge events and related damages in coastal regions of China. The results show a reasonable fit for storm surge disaster prediction and encourage the possibility of using the method for future studies.
Estimation Study on Shear Wave Velocity of Seabed Using GRNN
Authors: Di Sheng Jie , Shan Zhi Gang , Xu Xue Yong
Published: July 2014

Characterization of the shear wave velocity of soils is an integral component of various seismic analysis, including site classification, hazard analysis, site response analysis, and soil-structure interaction. Shear wave velocity at offshore sites of the coastal regions can be measured by the suspension logging method according to the economic applicability. The study presents some methods for estimating the shear wave velocity profiles in the absence of site-specific shear wave velocity data. By applying generalized regression neural network (GRNN) for the estimation of in-situ shear wave velocity, it shows good performances. Therefore, this estimation method is worthy of being recommended in the later engineering practice.