bluuebunny/crossref_metadata_2025 huggingface dataset:
Current Situation and Development of SHPF Project in China
Authors: Guan Chun Man
Published: July 2014

The project of substituting small hydropower for fuel (SHPF project in short) in China has been implemented for ten years and has achieved significant economic, social and ecological benefits. The construction, completion situations, results and major experience of the SHPF project are summarized. The existing problems are analyzed. Some suggestions are given for the construction and management of similar projects in future.
Testing Study on the Effects of Water Content on Permeability for Coal
Authors: Zhang Chun Hui , Xu Xiao Pan
Published: July 2014

To obtain the effects of water content on the permeability of coal, briquette specimen were obtained from Wulong Mine, Liaoning Province. The permeability of the air drying, bounding water and saturating specimens were tested with self-made equipment respectively, and the effects of water content on permeability for coal were studied. The results showed that: (1)The permeability of specimens decreases with confining pressure increasing, and the air drying and bounding water specimens take on obvious slippage effect. However the saturated specimens never take on slippage effects. It is because the channels of saturated coal sample are occupied by water. When the gas goes through specimens, gas never is absorbed. Collision between gas and the channel wall decreases, and the slippage effect disappears. (2) With water content increasing, the permeability of specimens decreases. (3)The permeability of specimens increases when pore pressure increases.
Optimization Study on Drainage System for Canal of Middle Route Project of SNWT in Expansive Soil Area with High Groundwater Level
Authors: Cui Hao dong , zhang Jia Fa , zhu Guo Sheng , Wu De Xu , Zhang Wei , Wang Jin Long
Published: July 2014

The seepage field regulation is important for the stability canal liner plate and slope for along the Middle Route of the South-to-North Water Transfer Project, especially for stretches excavated in expensive soil area with groundwater level. In order to analyzing the rationality and efficiency of seepage regulation measures comprehensively, a typical section was modeled, and the seepage field was simulated with the 3D finite element technology. The distribution of seepage field was analyzed and the seepage control measures were compared. The results show that water pressure on the underside of canal pavement would be reduced significantly by the measures, such as the measure of drainage cushion with drainage holes which open just when ground water level is higher than the canal water level, the measure with drainage cushion replaced by the drainage board. The differences among the two kinds of measure were compared. Their application conditions were discussed and proposed.
The Numerical Simulation of the Flow Field in the Micro-Pressure Inner Loop Reactor
Authors: Liu Jiang Chuan , Yin Zhi Gang , Ji Wei
Published: July 2014

The treatment of the urban sewage and the Organic industrial wastewater has been transformed from removing of the organics to the Removal of organic matter and nitrogen, phosphorus. According to the deficiency of the Traditional wastewater treatment process,the micro-pressure inner loop reactor is put forward to solve the Anaerobic, anoxic and aerobic environmental issues in this paper. Aiming at the newly development of the micro-pressure inner loop reactor, based on the methods of Computational Fluid Dynamics, using the methods of computational fluid dynamics, By analyzing the velocity distribution field, flow lines, the gas volume fraction and other factors, the result shows that the reactor Meets the actual needs of the project, and provides a theoretical basis for practical engineering equipment.
Research on the Calculation Method of Earth Pressure on the Back Side of Large Cylinders
Authors: He Jia Long
Published: July 2014

The study on calculation method of earth pressure around the circle of large cylinders will be deduced in this paper. The arch effect of soil is introduced into study. Considering the soil arch effect, different stress sections appear in the soil between two cylinders due to the change of stress state. Equations are established respectively in these sections and the analytic solutions to the equations are obtained
The RCC Arch Dam Analysis during Overload
Authors: Xia Yu , Yu Ying Ye , Zhao Xiao Lian , Zhang Zhong Qing
Published: July 2014

It does numerical analysis on the overload of RCC arch dam named wanjiakouzi, through the analysis, we try to find the damage process of the dam. It does elastic-plastic analysis by FEM. Result shows that the horizontal cracks are usually a very important symbol, it means the dam will reach its ultimate capacity.
The Application of Vacuum Preloading Method in Soft Soil Foundation Underwater
Authors: Feng Yu Qin , Zhang Lu
Published: July 2014

On the basis of engineering project in coastland, this article analyzes the construction technology and reinforcement mechanism of vacuum preloading reinforces soft soil foundation. By indoor soil test of Reinforcement of soil before and after processing, comparing the change of the physical and shear strength index, verify vacuum preloading method underwater is effective means in handing soft ground and provide some experience for regional development and promotion of underwater application of vacuum preloading technology.
Relaxation Analysis of the Arch Dam Foundation Rock Masses of Jinping I Hydropower Project
Authors: Xiao Bi , Zhou Dong Ni , Min Zheng Hui
Published: July 2014

The arch dam of Jinping I hydropower station is on obvious high ground area, and the foundation rock masses may relaxed while excavating. Limit tensile strain is put forward to be relaxation criterion. By three-dimensional elastic-plastic finite element method analyzing, and imitating the dam excavating steps, the maximum principle strain of the dam foundation rocks is obtained. The research indicates that the maximum principal strain of upstream side is greater than that of downstream side commonly, and some area would relaxed, with 41m maximal relaxed depth. By engineer analogical research with Xiaowan arch dam foundation rock mass, which have relaxed while excavating, the calculate method and criterion of this paper are reliable, and they can provide reference for engineer design.
System Analysis of Construction Quality Control Measures of Coastal Levee
Authors: Wang Xin Quan , Li Hong , Han Shang Yu
Published: July 2014

The phenomenon of the actual situation leave the design index is very common during the civil project construction especially in the coastal levee construction. As the way to reduce the probability of diseases occurrence, from the aspect of quality accident analysis, construction quality monitoring moisture, quality inspection and accident early warning system, the paper studied the levee construction quality control monitoring system deeply and advanced some useful conclusion.
Experimental Study on Mooring Manner and Safety Operation for 450,000DWT Supertanker
Authors: Jiang Bing , Huang Xuan Jun , Lv Ying Xue , Zhang Xian Bo
Published: July 2014

At present, many oil tank wharfs of 300,000DWT which taken the maximum of 450,000DWT supertanker into account had been built in our country. In this paper, through the physical model test on 450,000DWT supertanker, the mooring line tension with different mooring arrangements, cable diameters and cable materials were studied and the wave condition for the supertanker safety operation was given. The results showed that: on the same wave condition, to increase the steel cable’s diameter could reduce the ship’s movements, which could enhance the ability to operation. In addition, using the combination cable on the same diameter instead of the steel cable could reduce the tension of mooring line and increase the working ability effectively. The research results can provide reference and guidance for the future of supertankers mooring operation.
Experimental Study on the Offshore Positioning and Installing of Large Caisson
Authors: Huang Xuan Jun , Zhang Wen Zhong , Jiang Bing , Lv Ying Xue
Published: July 2014

The traditional method of the offshore caisson positioning and installing is using the barge or floating crane, but for the large caisson with 26,000 tons, the method is unable to achieve apparently. In this paper, the offshore location and installation of the large caisson with mooring line system and anchor cable system are studied. The research gets the wave and flow conditions results as well as the related and advertent items, which provide the reference for large caisson positioning and installation as well as the similar engineering construction technology.
Numerical Model on Hydrodynamic Impact from HZM Bridge
Authors: He Jie , Sun Ying Jun , Zhao Xin Sheng
Published: July 2014

In this paper, a 2D model for the simulation of shallow water flow by convection and diffusion over variable bottom is presented, which is based on the FVM (finite volume method) over triangular unstructured grids. The format of Reo’s approximate Riemann is adopted to solve the flux terms. And the bed slope source term is treated by split in the form of the flux eigenvector. For the diffusion terms, the divergence theorem is employed to obtain the derivatives of a scalar variable on each triangular cell. The numerical model is adopted to simulate the hydrodynamic impact from HZM (Hongkong-Zhuhai-Macao) bridge on Pearl River estuary. The simulated results show that the HZM bridge has little influence on the distribution of hydrodynamic environment in the Pearl River estuary.
A Kind of Floating Breakwater Sheltering Deep Water Aquaculture
Authors: Cheng Xiao Fei
Published: July 2014

This paper briefly introduces the design, construction and wave attenuation effect test of a kind of floating breakwater sheltering deep water aquaculture. This novel floating breakwater structure is composed of 28 standard modules and corresponding anchoring systems, and each standard module comprises a catamaran raft and a wave-attenuating and oscillation-inhibiting device, with a length of 30 m, a width of 7 m, a depth of 2 m and a draft of 1.1 m. Each catamaran raft employs a box-shaped multi-ribbed beam-and-slab structure, and was constructed using high-performance concrete and ferrocement materials and internally filled with polystyrene foam plastics. Each wave-attenuating and oscillation-inhibiting device uses a detachable split box-shaped structure and was pre-fabricated using high-performance concrete, with a length of 2 m, a width of 1.638 m and a height of 2 m. Each standard module is anchored using 6 anchor chains, each of which has an on-floor length of about 25 m. After construction, this floating breakwater system was tested for wave attenuation effect, and the data analysis results show that the floating breakwater system has a wave attenuation effect of up to 50 %.
Research of Sediment Transport Trend and Erosion-Deposition Characteristic of Yangma Island Sea Area
Authors: Wang Ying , Ye Wei , Li Ming Chang
Published: July 2014

The article adopts the methods of long shore sediment transport calculation、historic chart comparison and numerical simulation of ECOMSED and analyses erosion-deposition characteristic of the Yangma Island sea area. Research shows that the deposition-dominating areas are located at the southwest of study area, while the beach between Xin’an River and Yuniao River shows slightly erosion trend.
Appropriate Jackup Selection in Disturbed Wellsite by Pile Inserting and Pulling in Offshore Oilfield
Authors: An Yong Ning , Song Qing Feng , Li Jing
Published: July 2014

Pile inserting and pulling activities may occur for many times in some wellsite in Offshore Oilfield, that resulted in serious stratum disturbance and complex strength change, it’s difficult to select appropriate jack-up drilling platform in the workover process latterly. By applying American Petroleum Institute  norms, calculating the pile bearing capacity of two typical jackup, combing with the actual data of jackup emplaced, this paper analyzes and compares the suitability of various type of jackup in place in seriously disturbed wellsite by pile inserting and pulling, and then offers a proposal on how to select the appropriate jackup in such wellsite as a reference.
Analysis on Impact of the Node Connection Pattern for Fastener-Style Steel Pipe Formwork Support
Authors: Liu Li , Wang Bo , Wang Ju Chao , Liu Ya Nan
Published: July 2014

Fastener-style steel pipe formwork support is currently the most widely used form of template support during the domestic construction. At present, there are many models for the node connection pattern. This paper used ANSYS to build different connection pattern models of formwork support and draws the conclusion that the connection pattern of semi-rigid nodes is the most conform to the actual working conditions. This provide the basis for the theoretical research on fastener-style steel pipe formwork support.
The Technology Innovation of Green Soft Ground Handling Based on Squeezing and Consolidation Composited
Authors: Shao Jun Yi , Zhang Xiao
Published: July 2014

In this paper, we sorted soft foundation treatment technology by quantifying based on evaluation technique of life cycle environmental load and choose cement mixing pile which life-cycle environmental load is small and spiral pump pressure CFG pile which carrying capacity is high to integrate. It not only improved soil compaction effects, but also solved the problems of other technologies in the foundation process, such as low carrying capacity, reduced diameter, broken pile, virtual pile and so on. Besides, it has reduced the cost of the project and the application prospects are broad.
Discussions on Foundation Pit Construction Scheme of Large Building in Mountain Area
Authors: Lin Meng Jie
Published: July 2014

Based on the analysis of the engineering geology and the hydrology data of a large construction project along the river in Hunan province, according to the engineering design requirements and the local construction conditions, the paper analyzed in-depth on deep excavation, groundwater control and high slope treatment schemes. The results can provide a reference for similar engineering problems.
Outstripping Engineering Preparation of Construction Sites
Authors: Oleinik Pavel Pavlovich , Grigoryeva Larisa Stsnislavovna , Brodsky Viktor Isaevich
Published: July 2014

The basic scheme of intensive implementation preparatory work, the general form of the formulas for determining the structure and amount of preparatory work performed prior to the start of construction.
Research on the Problems and Countermeasures for Steam Curing of Assembled Composite Wallboard
Authors: Xu Chun Yi , Yan Lei , Li Chen , Cao Zhi Wei
Published: July 2014

For researching principle and production line state of steam curing of composite wallboard, the art have been conducted through actual investigation and field test. Based on the influence of steam curing on the strength of high performance concrete, durability and volume stability, put forward suggestions of steam curing system; Several problems have been raised for steam curing in the actual production, then some correlative improve measurements are given. Provide the reference for the production and development of the residential part in our country.
Reinforcement Method Choice of Deep Soft Soil Foundation
Authors: Zhang Chun Mei , Liang Li Juan , Huang Chao
Published: July 2014

Soft soil’s properties including low bearing capacity and large deformation leads to the necessity of reinforcement of foundation when it is made of soft soil. This article illustrates the features and applications of different methods, through the comparison of them.
Bending Resistance of a Slender Plate Girder with Longitudinal Stiffener
Authors: Gutiu Stefan I. , Moga Catalin
Published: July 2014

This paper presents an analysis regarding the bending resistance of a slender plate girder having a longitudinal stiffener in the compression zone of the web.The influence of the longitudinal stiffener rigidity on the bending resistance of a slender girder of Class 4 section is analyzed, starting from the hypothesis that the transversal stiffeners are infinitely rigid.
Integrated Fuzzy Evaluation of Raw Water Eutrophication Based on GIS
Authors: Liu Jun Ping , Shao Jia Wei , Dong Fei Long , Ma Xiao Yan
Published: July 2014

To do a research about raw water eutrophication of water plants in Hangzhou, samples of raw water in Jiuxi, Xiangfu, Nanxing, Qingtai Plant were collected and analyzed to get more than 10 water quality indexes. Turbidity, DO, COD, TN, NH3-N and CHL-a serving as example. supported by GIS, integrated fuzzy evaluations of raw water eutrophication in July and December were completed applying entropy weight method. The result shows that in terms of the nutrient degree, Xiangfu is the most qualified while the least one is Qingtai. Overall, raw water in December is of higher quality than July.
Ultra-High-Rise-Building Water Supply and Drainage System Design
Authors: Si Ya Nan , Zhou Ming , Liu Yu Hang , Deng Ling
Published: July 2014

With the rapid development of chinese economy,to speed up the modernation of the society more and more ultra-high-rise-building rise abruptly.This article as Liuhe square project in Shengzhen city an example,elaborated the water supply system, drainage system,and fire fighting system design in water supply and drainage system design.
Model Precision Assessment of Water Distribution System Based on Uncertainty Analysis
Authors: Shu Shi Hu , Zheng Xiao Ming , Ruan Jiu Li
Published: July 2014

This research analyzed the operation characteristics of the urban water supply network, the space and time change rule of water consumption and the micro modeling process. Using typical simulation software and the corresponding computer environment, the authors took a simple network, e.g., the pipe network model parameters, and under the conditions of variables uncertainty. and created a new Hydraulic Model. Corresponding uncertainty quantitative techniques of water supply network computer model technology were put forward, and new integration software was developed on that basis.
Affect of Large Deep Foundation Pit Dewatering on the Neighboring Buildings
Authors: Ding Ke Wei , Zhao Fan , Zhang Xiao Zhi
Published: July 2014

Take the ground-waterlowering of foundation pit project in DA Dongmen subway station in Hefei as an example, introduce a kind of environmental impact appraisal model,using softwareFLAC3D to imitate the key index--surface subsidence, offers relevant safe bases to construct security monitoring department.
Hydraulics of Looping
Authors: Zolotova Julia
Published: July 2014

This article describes the urgency of studying the reduction of hydraulic loss in terms of energy efficiency.Loopingis a section of the pipeline, which is laid in parallel with the main pipeline. Distribution of expenses on Looping`s branches in the valid movement minimizes dissipation in the flow and, consequently, reduces the energy losses in the piping network. Literature describes the calculation of a system of parallel lines through quite cumbersome calculations. The purpose of this work is to create a method of simple and quick calculation of looping. The article describes the simplest case of the connection: every branch does not contain any nodes, neither a source nor wastewater. Testing calculation of looping is represented in three conditions: looping`s resistance coefficient shown, partial expenses` calculation is transformed to rotating circulants and looping`s statics equations coincide with necessary condition of a minimum.
Analysis and Evaluation for the Economic Performance of Ground Source Heat Pump System with Waste Heat Recover
Authors: Zhao Zhong Chao , Feng Wei Xian , Mi Hao Jun , Xue Yong
Published: July 2014

Economic performance of investment capital, operational costs and supplying costs of domestic hot water for different scenarios of ground source heat pump system (GSHPS), which designed for a hotel located in the hot summer and warm winter area, have been analyzed using the dynamic annual cost method. The results show that the investment capital decreased while the operational costs increased first and then decreased with the ratio of waste heat recovery of GSHPS increased. The comprehensive benefit of GSHPS with waste heat recovery is distinct compared with conventional GSHPS. When the ratio of waste heat recovery is 50%, the dynamic annual costs of GSHPS are minimum and achieve the optimization of energy-saving effect.
Experimental Investigations on Effect of Particles Removal in Cleanroom with Non-Unidirectional Airflow
Authors: Wang Yu
Published: July 2014

Efficient airflow delivery is key to achieve effective contamination control for a high-performance cleanroom. The influence of airflow organization on effect of particles removal in cleanroom with non-unidirectional airflow was investigated in this paper. A series of experiments were conducted on a cleanroom experimental platform with different airflow organization modes and supply air volume variation by frequency converter ( 40 to 50 Hz, 5Hz interval) on air-supply fan unit. The results showed that higher cleanliness could be gained at local area in cleanroom with radial airflow organization. Moreover, the outcomes from these experiments indicated that particle concentration at measuring points appeared more orderly when the cleanroom operated with radial airflow organization. The conclusion can be drawn that radial airflow can benefit contamination control at local area for cleanroom operation with non-unidirectional airflow when compared with ceiling-supply and wall-return airflow organization.
A CFD Simulation of Indoor Natural Ventilation of a Residential District in Zhuzhou
Authors: Wang Zhi Yong , Yang Shun Fu , Liu Chang Rong , Zhang Tian Yu , Cui Na
Published: July 2014

With the promotion of building energy conservation, many residential areas are closely link with energy saving in design phase, and natural ventilation becomes the key to reduce building energy consumption. Thus, house design and building distribution of residential district is particularly important. Computational fluid dynamics (CFD) get rapid development in recent 20 years, especially in architectural design. This text established a model of part of a residential district in Zhuzhou based upon ANSYS FLUENT CFD software, and used numerical simulation method to simulate the condition of indoor natural ventilation under typical summer climate when the doors and windows of buildings were opened. The distribution regularities of indoor velocity field and pressure field and etc have been gotten. These data provide a theoretical basis to evaluate the building distribution of residential area.
Simulation Study on Characteristics of Ultra-Low Temperature Heat Pump Air Conditioning System for Pure Electric Vehicles
Authors: Li Hai Jun , Zhou Guang Hui , Li An Gui , Li Xu Ge , Chen Jie , Chen Tong
Published: July 2014

In view of high discharge temperature of compressor, the heating performance attenuated seriously, even unable to work properly and other issues of normal heat pump air conditioning system for electric vehicles under low temperature conditions, a gas-mixing heat pump air conditioning system for pure electric vehicles is designed. Based on the first law of thermodynamics and coupling properties among all components, the mathematical model of this system is established. The analog computation of main performance parameters of this system is carried out by this model, having a better match in comparison with experimental results. By simulation, the results show that the system can effectively solve the problems of high exhaust temperature from compressor and heating performance attenuation seriously of non-gas-mixing heat pump air conditioning system for pure electric vehicles under low temperature condition.
Research on the Construction Technology of Radial Underground Heat Exchanger and its Heat Exchange Performance
Authors: Wang Rong Hui , Wang Qing Hua , Feng Ye
Published: July 2014

5 radial heat exchange wells were designed, and the different angle drilling, drilling pipe, and grouting backfill construction technology was studied. In addition, the heat transfer performance of the buried radial heat exchange wells was tested. The results show that, design of pipe equipment is feasible, construction is convenient, and the ratio of backfill material is reasonable; the heat transfer performance of 90 °buried tube is the best. The smaller the angle with the ground heat exchanger, the greater the heat exchange performance is affected by the surface temperature.
A Method to Determine GSI Value by Using P-Velocity and its Application in Engineering
Authors: Zhao Yuan , Wang Liang Qing , Zhou Peng , Han Yue , Chen Guo Rong
Published: July 2014

Rock mass mechanical parameters play a significant role in geotechnical engineering design, slope stability evaluation and numerical simulation, which is commonly determined by GSI method. The simplified method using P-velocity to determine GSI (Geological Strength Index) values is proposed in this study, avoiding the limitations of Hoek-Brown method. The relationship between GSI and P-velocity is established through data collected from several projects in China. Then the dam site of Rumei hydropower station, Tibet, China has been taken as a case study to validate this relationship. This method can be utilized directly in engineering projects since it can meet with the engineering accuracy requirement and reduce the cost.
Study on Surface Deformation Law of Western Chengchao Iron Induced by Underground Mining
Authors: Zhou Yi Chao , Chen Cong Xin , Liu Xiu Min , Xia Kai Zong
Published: July 2014

Analysis of the surface deformation law in mines can provide a significant guide to safety operation of important structures around. For mental mine, field monitoring and simulation are the major methods to study its surface deformation. Chengchao iron mine is a typical mental ore. Taking it as background engineering, the Flac3D is used to simulate its engineering geology condition and mining technology, and study its surface deformation law. It turns out that the simulation results are very close to the field monitoring data. With the mining on, important structures such as ore dressing workshop and new auxiliary shaft will go into the shift line range. It is necessary to adjust the mining program for the safety of the important structures.
Numerical Simulation Study on Setting Stopping Line of Working Face in Shuguang Mine
Authors: Xue Hua Jun , Chen Jun , Liu Bo , Kong Jie , Hao Zhi Jun
Published: July 2014

The surrounding rock deformation of pedestrian roadway was serious under the influence of the working face. And it has affected the safety and normal use of roadway. To ensure the long-term stability of the pedestrian roadway surrounding rock and increase the coal recovery rate of working face, the paper studied the position of stopping line of 1203 working face by numerical simulation. The results show that setting 115m wide of security coal pillar between 1203 working face and pedestrian roadway that the area of stress concentration near the working face has less effect on the pedestrian roadway could better control the surrounding rock stability of the pedestrian roadway and meet the need of the long-term normal production use. It narrows the width of security coal pillar, increase the coal resources recovery rate and achieve the better economic benefits.
The Research of Gas Drainage Technology in Daning Coal Mine
Authors: Zhao Zhong Ming , Wang Gang
Published: July 2014

3# coal seam of Daning coal mine is outburst,thus severely restricting the safe production. Based on the analysis of gas emission sources and the logical drainage parameters, firstly, Daning coal mine arranged some drilling fields, then utilized the VLD-1000-type rig to drill boreholes, achieving the integrated gas drainage of the coal seam and goaf. Finally, there is a test on the drainage result. The results showed that, through this kind of integrated gas drainage technology, the highest value of gas pressure in the coal seam reduced to 0.63MPa from 1.95MPa after twelve months’ drainage, and the gas drainage rate of the whole mine reached 77.6%, achieving efficient use of gas clean energy.
Energy Characteristics of Brittle Rock in Failure Process
Authors: Tang Ai Jun , Shi Cheng Gong , Wang Ying , Wang Jian Hua
Published: July 2014

Energy transformation in rock failure process is a complicate process, especially in the high geostress conditions. First from the point of energy, analysis and study on the rock deformation and failure process under uniaxial compression and triaxial compression condition. Based on the test results, the deformation failure characteristics and its energy in triaxial compression are analyzed. Reveal the energy dissipation and energy release characteristics in the process, and found the internal causes is stored elastic in rock mass unit can release suddenly and cause rock damaged. Especially in the high geo-stress condition, the compressed engineering rock mass are often faced with the risk of unloading damage. After add anchor, the mechanics performance of specimen after peak period is significantly improved, and can absorb more of the release of strain energy, which is helpful for maintaining the overall stability of surrounding rock.
The Research on Structure Fire Resistance Test of Fire Retardant Rigid Polyurethane
Authors: Wang Jin Ping
Published: July 2014

The developed rigid polyurethane foam is added several inorganic materials, which made the polyurethane foam release less poisonous gases in fire. The oxygen index value can reach more than 32 percent, and under the standard heating curve the retardant rigid polyurethane foam can present the performance of 1h fire resistance test.
Comparative Analysis of Wind Load for Transmission Tower between Chinese and American Codes
Authors: Xu Zhen , Zeng Yu Jie , Cao Dan Jing , Lang Xu Jun , Tian Li
Published: July 2014

Wind load computation formula for transmission tower of 《Technical code for the design of tower and pole structures of overhead transmission line》 and 《Design of latticed steel transmission structures》 are studied in this paper. The differences of basic wind speed, height variation factor of wind pressure, shape factor and wind load factor are compared in detail, respectively. The results show that the wind load defined in the Chinese code is little different from the American code. However, some parameters are still worthy of further discussion. The analysis results can be a reference for the design of transmission tower.
Research on Concrete Columns Seismic Performance of Super Early-Strength Composite Fibers after High Temperature
Authors: Sun Chang Zheng , Wu Rui Xiao , Zhao Hai Nan
Published: July 2014

Super early-strength composite fiber concrete has been widely used. Seismic Performance of super early-strength composite fiber concrete columns needs to be known after high temperature, quasi-static tests under different high temperatures are experimented. The experiment showed that: the downtrend of hysteretic curves and skeleton curves are consistent, but reductions for both hysteretic curves and skeleton curves are diverse after different duration.
The Construction of Emergency Logistics System Framework and Information Platform System
Authors: Chen Wei Ke , Hua Cui
Published: July 2014

This paper, based on the analysis of the characteristics of emergency logistics and the problems existing in its development, proposes hierarchical structure and the basic framework of the emergency logistics system, and explains the specific content of each subsystem. In addition, this paper constructs intelligent and multilevel collaborative information platform system, which is oriented to the emergency logistics system, and expounds its main functions to provide technical support for the operation of emergency logistics system.
P-Wave Attenuation Mechanism of Calcareous Sand under Explosion
Authors: Xu Xue Yong , Di Sheng Jie , Cheng Wan Qiang , Li Wei , Du Wen Bo
Published: July 2014

Calcareous sand is a special marine geotechnical medium that exhibits interesting physical and mechanical properties resulting from its composition and structure. In the current paper, the blasting compression wave (P-wave) attenuation mechanism of calcareous sand under explosion was studied through explosion experiments. The decay law of the P-wave was obtained based on the earth pressure at different distances from the blast center. The results show that, the broken, compress, and damage zones were formed under the effect of blasting load, many particles were broken near the blasting zone. Calcareous sand exhibits strong absorption and attenuation effects on the P-wave because of its particle breakage characteristics.
Vulnerability Assessment of Truss Structure Based on Strain Energy and Damage Scenarios
Authors: Xu Yan , Yu Xian Cai , Li Wei Bin
Published: July 2014

The method of structural vulnerability assessment presented in this paper is closely in accordance with the definition based on two aspects, strain energy of structure and damage demand of members. The search process of damage scenarios was carried out by an example of truss structure, and the results of analyses included importance factor of members, damage scenarios with the minimum number of killed members, and local damage occurred in advance. The influence of loading on member importance factor and vulnerability index was discussed and it showed that though with the agreement of general trend, the rank of importance factor or VI index under a specified scenario varied greatly. The analysis could be utilized as the proof of measures to enhance structural capacity to meet the extreme event.
Monitoring of Flooding Water under Coal Mine Based on Improved Fuzzy Clustering
Authors: Nie Meng Ya , Zhou Meng Ran , Fu Xue Qiang
Published: July 2014

Due to the complicated coal mine flooding water quality monitoring data, in order to extract the effective data from vast amounts of data, this article used the fuzzy clustering to analyze the monitoring data processing. This study makes a brief analysis of monitoring data structure, then analyzes the shortcomings of fuzzy C mean clustering algorithm (FCM),which also proposes fuzzy C-means algorithm based on particle swarm optimization (PSO-FCM). Finally samples of the underground water data are used to carry out the instance simulation. The experiment results showed that in dealing with data samples. The algorithm had some advantages and it was worthy of research.
The Visualization of Health Monitoring System for Bridge Using CORS and GIS
Authors: Kong Qiao Li , Li Yu Hang , Han Li Tao , Guo Jin Yun
Published: July 2014

CORS is called Continuous Operational Reference System, which comprise a network of Global Positioning System receivers. Traditional sensors were used to determine the working environment parameters and mechanical property parameters of the bridge, and CORS technology was applied to obtain the positions of bridge monitoring points in three axis directions, besides the technology was adapted to combine GIS software with the relational database, in which the function of GIS and SQL Server were to manage the spatial information and the corresponding attribute data. In this paper the technology route was designed in detail to realize the real-time dynamic monitoring and visualization analysis of the deformation of large bridge. This system was developed to evaluate valuable information such as the stability, durability and reliability of the bridge.
Application of Three-Dimensional Visualization Technology in Real Estate Management
Authors: Cui Jian , Ma Ji Ju , Ma Dong Ling , Yang Na Na
Published: July 2014

Real estates are the material basis of the survival and development of a city, and are important parts of urban development. We use 3ds Max as a tool to create 3D models of buildings and Supermap Deskpro.NET as a platform to make an effective combination of 3d models, real estate graphic data and real estate attribute data. Three-dimensional display of surveying and mapping information and three-dimensional visualization management of house property information are realized.
Calculation of Land Consolidation Potential Based on GIS
Authors: Liu Yan Hua , Chen Wei Qing
Published: July 2014

Through the analysis of land use actuality, this paper summarizes the characteristics of land use, in virtue of geographic information system (GIS) platform, the database of land consolidation is constructed, combining with different calculation models of cultivated land and rural residential land consolidation potential, the consolidation potentials of cultivated land and rural residential land are calculated, and the thematic maps about land consolidation potential of each village and town in study area are mapped out. The results show that the land consolidation areas are mainly concentrated in the middle of study area.
Development of Topographic Maps Symbols Library
Authors: Sun Cai Min , Xu Yi Xin
Published: July 2014

Visual LISP language is favored by many people for its simple and practical. Because of most CAD teaching materials centre on introducing concrete languages’ use and single symbol making, lack of a comprehensive descriptionof the whole process of developing professional symbols library, it is very difficult for People having mastery of LISP languages to developing professional symbol library by this language. In this article, the authors develop a symbols library for common Topographic Maps and design an environment to transfer and input the symbols with the aid of Visual LISP language, including defining graphic coordinates systems, coordinates transformations, putting library files in order, calling user-defined file etc. This paper provides great help for people who Devote oneself to map symbol library system development.
Research and Extended of Semi-Parametric Model Additional System Parameter
Authors: Wu You Ping , Wang Chun Tao , Wang Jia Bang
Published: July 2014

In this paper, a new solution to the semi-parametric estimation of a mixed model additional system parameters was conducted to derive a calculation method of parameter adjustment at the model regularization matrix, and determine the estimation of parameters and non-parameters as well as the accuracy evaluation formula of the model. The effectiveness of the semi-parametric estimation method was demonstrated through simulation examples, and the semi-parametric model additional system parameters was further extended.
Analysis of Underground Space Azimuth Measuring and Data Processing in a Tunnel
Authors: Wang Tao , Duan Hu Rong , Jiang Liu Tao , Liu Shun
Published: July 2014

In this paper, we studied high accuracy azimuth measuring on improving the precision of traverse azimuth from the perspective of transfixion measurement error in a tunnel project. On the basis of a feasible scheme using Gyro Total Station measurement is given. Data processing theory and method are also introduced with a successful tunnel transfixion case. The transfixion results show that the instrument constant measurement precision is 3.7", baseline coordinates azimuth measurement accuracy is 4.8" into tunnel, the final orientation coordinate azimuth value and traverse measurement values differ is 11", to guide the construction of the gyro orientation with survey results achieved tunnel through smoothly.
Discussion on the Application of GPS Technology in Bridge Construction Plane Control Net and in Survey of Bridge Axis Lofting
Authors: Jiang Si Yi
Published: July 2014

The article introduces that the GPS technology in the bridge construction survey turns the bridge axis lofting spots and the construction control net into the overall net after completing the plane control net, to centrally gathering information and simultaneously adjustment processing, so as to satisfy the high accuracy request of the bridge axis lofting.
Improved BP Neural Network Model Applied in Settlement Analysis
Authors: Gao Liang Bo
Published: July 2014

According to the settlement and deformation of pavement in subway construction, the paper improved on the basis of gray system theory and BP neural network forecasting model. The method is adapted to modified residual prediction model to predict with engineering examples. It provides decision-making basis for construction engineering and monitoring.
Research on GPS Height Partition Fitting Method
Authors: Wang Chang
Published: July 2014

In Diaobingshan area, Use 76 data points (geodetic height and normal height are known) as experimental data, the quadric surface fitting mean square error as GPS height partition fitting basis in the area. In 76 data points, some data points which GPS height fitting residual value is less than the quadric surface fitting mean square error in a region, other points which GPS height fitting residual value is more than the quadric surface fitting mean square error in a region, in the same time, individual regions (data points is less) use mobile triangle method to establish GPS height the fitting model. The experiment prove that the effect of this kind partition fitting method is better than that of no partition fitting method, has a certain reference value.
Numerical Analysis of the Bearing Behavior of Single Pile under Horizontal Load
Authors: Ma De Fu , Guo Guang Jun , Yang Xia , Zhou Zhi Dong
Published: July 2014

Understanding the pile behavior and predicting the capacity of piles under horizontal load are important topics in foundation design. In this paper, the mechanical characteristics of single pile under horizontal load is analyzed based on FLAC3D finite difference software, and the load-displacement curve, the bending moment, shear force, soil resistance under all levels of load and the distribution law of p-y curve along the pile shaft are obtained. accordingly the following conclusions can be made: the bending moment of the upper part of pile body is big, the maximum bending moment is at the height of 2~3 meters and it is almost zero below the depth of 9 meters. The bending moment increases with the increase of load, the point of maximum bending moment moves down along the pile body with the increasing of horizontal load. and the location of the point of maximum bending moment moves from 2 meters below the ground to 3 meters below it. The distribution of soil resistance along the pile shaft is a reverse "S", the maximum of pile lateral soil resistance is at the height of about 2~3 meters below the ground.
Method of Extended Domain and General Principles of Mesh Approximation for Boundary Problems of Structural Analysis
Authors: Akimov Pavel A. , Mozgaleva Marina L.
Published: July 2014

The distinctive paper is devoted to general principles of mesh approximation for boundary problems of structural analysis with the use of so-called method of extended domain, proposed by Prof. Alexander B. Zolotov. In particular we studied questions dealing with approximation of domain, approximation of functions and approximations of operators. Mesh functions are introduced as well as corresponding mesh operations and various types of implementation. The results are rather efficient algorithms in respect to number of operations, computing time and required memory.
Numerical Simulations of the Internal Fluid Field for Porous Scaffold Used in Tissue Engineering
Authors: Liu Qing Gang , Jiang Jing Zhi , Cui Hai Ting , Yu Xin Qi , Peng Pei Ying
Published: July 2014

Models with main-branch channel, crossing channel and net type channel are established and nutrient liquid with a velocity of 0.01m/s is adopted in the study to investigate the fluid field in the channel by using FEA software FLUENT. The velocity and pressure distribution have been obtained in the investigation. By comparing the results in the three models, pressure and velocity distribution in the second and the third models are relatively uniform and are appropriate for the bionics principles. Studies in this paper will be of benefits for the development of tissue engineering.
Preliminary Application of Software Package GPPS to Spare Linear Systems from Meso Scale Simulation of Concrete Specimen
Authors: Wu Jian Ping , Ma Huai Fa , Zhao Jun , Wang Shu Chang
Published: July 2014

The general parallel preconditioning subspace iteration software GPPS is developed based on the integration of various preconditioning methods, parallelization techniques, and subspace iterations, to solve general sparse linear systems. The software has several characteristics, including high computational performance, good readability, simple interface, and excellent scalability. In this paper, the functions of the software are outlined, and then it is used to solve the sparse linear systems from meso-scale simulation of concrete specimens. The numerical experiments show that GPPS is clearly superior to the software package AZTEC, which is used in the simulation up to now, and in addition, ICT and the parallelization technique based on factors combination outperform other preconditioning techniques integrated in the software.
Numerical Decision of Problems of Structural Mechanics with Nonideal Unilateral Constraints
Authors: Lukashevich Anatoly , Rozin Leonid
Published: July 2014

Here computational models of contact of elastic systems with the contact finite elements (CFE) in a 2D or 3D frame-rod systems are reviewed. The solution is based on the method of the step-by-step analysis taking into account the character of loading, the complicated conditions of the contact and other factors consideration of which approaches the calculation circuit of the task to the real operating conditions of any structures or construction
Some Recent Developments in Coupling of Finite Element and Boundary Element Methods - Part II: Dynamic Procedures for Determining the Relaxation Parameters for the Mixed Dirichlet-Neumann Domain Decomposition FEM-BEM Coupling Method
Authors: Elleithy Wael , Leong Lau Teck
Published: July 2014

Part I of this paper presents an overview of the conventional and a class of domain decomposition finite element-boundary element coupling methods. In this part, a review of the mixed Dirichlet-Neumann domain decomposition coupling method, procedures for dynamic calculation of relaxation parameters for the mixed Dirichlet-Neumann FEM-BEM coupling method and an example application are presented.
Study on Downburst Wind Field Characteristics under Mountainous Terrain
Authors: Shi Hai Tao , Wu Yuan Ze , Yi Sun , Ji Bai Feng
Published: July 2014

Downburst is a strong downdraft thunderstorm in the ground formed after the violent impact and spread along the ground very sudden and destructive winds near the ground short. From an engineering point of view for the structure of wind-resistant design, researching downburst wind field characteristics and ultimately determining a reasonable downburst wind profile is one of the core objectives of the study. Terrain conditions are the major factors of downburst wind field characteristics based on the typical mountain terrain on the wind storm flow condition, this paper established typical 2D slope mountain terrain model, using the method of computational fluid dynamics to calculate the velocity contours and pressure cloud in different locations of the mountain. Finally we get the two-dimensional slope typical mountain terrain wind field distribution.