bluuebunny/crossref_metadata_2025 huggingface dataset:
Prediction of Deformation of Adjacent Existing Running Tunnel due to beneath Shield Tunneling
Authors: Luo Jia Yin , Ding De Yun , Xiao Xiao Qi , Ren Wei Ming
Published: January 2014

With the rapid development of metro engineering construction in China, the impact of shield tunneling on adjacent existing building has been paid more and more attention in recent years. Taken the Jiulongshan-Dawanglu running tunnel of Beijing Subway No.14 built by shield method as engineering background, a three-dimensional numerical model based on the soil-structure interaction theory is established by using the finite element software ANSYS to simulate the shield tunneling beneath the adjacent existing running tunnel of Beijing Subway No.1. The displacement of the adjacent existing running tunnel is predicted. During the shield tunneling, the vertical deformation of the adjacent existing running tunnel can reach up 2.8 mm, and the horizontal deformation value is about 0.5 mm, which can satisfy the project need and the requirements of relevant standard. The numerical results can be regarded as a valuable reference for the construction.
A New Subway Station Construction Method: Top-Down Boring with Cast-In-Situ Arch
Authors: Huang Mei Qun , Ding De Yun , Yang Xiu Ren , Wang Chen
Published: January 2014

With the speedy development of urban mass transit in China, more and more building environment problems are coming forth in many cities. How to choose available construction method to fast, safely and economically build subway engineering is worthy to be urgently studied. A new-type subway station construction method called top-down boring with cast-in-situ arch is presented through a large number of design calculations, research and analysis, on the basis of conscientiously analyzing traditional tunneling methods and engineering practice. Some advantages of this new method are briefly introduced, compared with the shallow mining methods for underground engineering construction, as well as its application in subway engineering. According to further study, this new construction method will be widely used in underground engineering projects. At the same time, the relative theory of this new method will be validated and promoted.
Analysis on the Impact of the Constitutive Model of Trains Vibration in Shield Tunnel
Authors: Quan Xiao Juan , Guo Xin Ming , Shi Kai
Published: January 2014

In this paper, with the in-situ engineering project Shiziyang tunnel of Guangzhou-Shenzhen Railway, under the disturbance of high-speed train vibration load, the shield tunnels dynamic response and foundations sand liquefying phenomenon are studied ,where they are mainly located in saturated and soft soil. Due to the tunnel going through the paralic deposited silt layer, silty soil, alluvial clay layer and the layer of fine sand or coarse sand layer, under the condition that enduring a long time of high-speed train running, which may easily lead to the foundation liquefaction and asymmetric settlement. At the entrance of the tunnel, with the poor geological conditions and weak cladding, which can easily induce sliding and collapse, where the geological conditions of this part is the most unfavorable place. Through numerical simulations, the main factor the constitutive model is explored, which may affect the single high-speed train loads on the vibration response of the train in shield tunnel and the law of accumulation and dissipation for pore water pressure.
Research on Supporting Technology of Wind Drift at B103W01 Workface in ShajiHai Coal Mine
Authors: Zhang Xiao Yu , Tian Yu Ming , He Ai Dong , Han Zhan
Published: January 2014

The deformation and failure problems in soft rock supporting cannot be effectively controlled with conventional methods. This paper put forward the coupling support technologies by the use of large deformation constant-resistance bolt, large deformation constant-resistance cable and bottom-grouting pipes, with the analysis of deformation and failure reseasons, combing with verifications in field-test project at B103W01 working face, State Grid Energy abundance Coal Limited Shajihai Coal Mine. It also provides the reference for the tunnels supporting under similar conditions.
Research on the Characteristics of Water in the Sleeper Void of Double-Block Ballastless Track
Authors: Xu Kun
Published: January 2014

According to the investigation and survey of the service condition of the double-block ballastless track in China, the breakage rate in the rich rainfall areas or the poor drainage lots of double-block ballastless track runs much faster than the dry areas. Some typical diseases, such as sleeper loose, contact loss between sleeper and roadbed slab, will lead to water still in the sleeper void. Free water underneath the sleepers would become dynamic water with certain pressure and flow rate under the high speed and high frequency action of train loads. Dynamic water is able to accelerate crack growth rate and scour the bonding interfaces between sleeper and roadbed slab[1,, affecting the safety ,durability and riding quality of track structure. It is meaningful for us to research on sleeper loose of double-block ballastless track under the coupling action of train load and dynamic water and prove the mechanism of sleeper loose in double-block ballastless track under action of dynamic water. Calculating the value of water pressure and velocity of flow and then providing references for study on the hydrodynamic characteristics.
Hydrodynamic Response of Wave Energy Converters under Complex Sea State
Authors: Yu Long Fei , Zhu Liang Sheng
Published: January 2014

In real sea state, Ocean energy devices to work hard to stabilize, or even destroyed. Based on Airy wave theory, Movement and force of heaving cylindrical wave-energy converter (WEC) was analyzed under the complex marine state. Then setting the South China coast as the environmental background, and simulating and computing the motion response of the buoy and the mooring system under various sea conditions. The computational data show that complex mechanical response was happened and the mooring system (SM) has excellent mooring performance. The research results have practical significance for heaving cylindrical WEC survival design under real sea conditions.
Research for Seepage Prevention Type of Dam Foundation of Xiabandi Hydraulic Engineering in Xinjiang
Authors: Song Yu Cai
Published: January 2014

Xiabandi hydraulic engineering is located in southern Xinjiang Pamirs, with the characteristics of" three high and one deep ", namely high-altitude, high seismic intensity, high slope and deep overburden[. Therefore, treatment of deep overburden dam is a thorny problem, deal with problem of dam foundation deep overburden for quality and safe operation of the project is very important. This paper sitting under the hydraulic engineering project, according to the difficulty of construction, seepage effects and costs and other standards for deep overburden seepage form a comparison study, the final selection of a combination of vertical seepage curtain wall forms to solve the deep cover layer impermeable problems and provide valuable experience for future similar projects in design and construction[2-4].
Research on Water Conservation of Zhengzhou City Center in 12th Five-Year
Authors: Lv Xue Liang , Qiu Jin Zhang , Hu Liang Ming , Zhang Jin Ping , Zhang Bin
Published: January 2014

On the basis of comprehensive analysis of water supply and the development of social economy in Zhengzhou, analysis of the balance of supply and demand of water resources and water-saving potential in Zhengzhou center city, and identified the water conservation planning target of Zhengzhou City center in 2015, it is concluded that water-saving potential in Zhengzhou City center in 2015 is 3000.28×104 m3; and put forward the countermeasures and measures of saving water from the aspects of industry and comprehensive life, for the water conservation planning of Zhengzhou City center in 12th Five-year to provide the reference basis.
Numerical Simulation Studies of the Gravity Dam of Magnesia Concrete
Authors: Yang Lu , Liu Dong Bo , Wang Zhi Kun
Published: January 2014

The adding of magnesia expanding agent can effectively control the generation of concrete dam fissure, and can play the effect of simplifying the temperature control measure , shortening the time limit of the project , improving the economic benefits and so on . This study will use the Abaqus CAE software to analyze the gravity dam of magnesia concrete . Check the features of magnesia concrete by comparing the adding one and the no adding one , and summarize the results of the numerical value simulation and compile the software to provide the theoretical basis for the numerical value simulation of magnesia concrete dam.
Regulation of Laijiapu Waterway in Jingjiang Reach
Authors: Liu Ya , Zheng Li , Huang Cheng Tao , Huang Zhao Biao , Liu Lin
Published: January 2014

After impoundment of the Three Gorges Reservoir, Jingjiang reach, in the middle of the Yangtze River, has gradually shown a series of atypical fluvial features, adversely affecting the maintenance of waterways. Citing the Laijiapu Waterway, a meandering segment in the lower Jingjiang for example, this paper compared the fluvial features of the channel before and after the impoundment, summed up its navigation-obstructing features, and proposed guarding the point bar on the convex bank and channel bar in the widening section as a key to maintaining the stability of the navigation channels.
Numerical Simulation and Experimental Research of Icicles under the Single Point of Blasting in the Yellow River
Authors: Meng Wen Yuan , Xu Guan Chao , Li Jia Qing , Xu Guan Chun , Guo Jun Wei , Zhao Wei
Published: January 2014

Blasting model of ice is established by ANSYS-LSDYNA in this paper. By using LS-PREPOST, the author analyzes the broken volume or diameter of ice in different working conditions, including the buried depth of explosive, the load and the thickness of ice. ORIGN drawing software is used to analyze the most suitable blasting location with different thickness of ice. The result shows that when the thickness is between 20cm and 60cm, the best blasting coefficient of water-medium ice is K=R/ H =0.5~1. It also shows that the explosive effect will be better when it is exploded under ice layer than in the middle or at the surface of ice layer. Calculation result and field test align fairly well. By simulating blasting parameter in different working conditions, ice prevention database is built, providing references for designers to develop a series of shaped into ice equipments. It also has important practical meaning to use various equipments to prevent and treat ice disasters of the Yellow River.
Effect of Abutment Load of Arch Dam on Stability of Underground Caverns Complex
Authors: Zhang Cun Hui , Zhou Shu Da , Ding Xiu Li , Huang Shu Ling , Zhang Yu Ting
Published: January 2014

Considering topographic and geologic conditions, project layout and investments, concret arch dam is adopted in a hydropower plant and underground powerhouses are arranged in mountains on left and right banks. However, the minimum distance between the excavation boundary of abutment of arch dam on elevation 850m and underground powerhouse is only 110m. Abutment load created by reservoir storage, permeability and earthquake may affect general stability of underground caverns in operation period. Thus, using elasto-plastic finite difference method, three dimensional numerical simulation models of underground caverns and slope of abutment of arch dam is establised and proposed key issues are systemly studied. The calculation results show that, under reservoir storage and dam vibration subject to earthquke, abutment load has small effect on plastic zone, displacement and stress around opennings and the caverns would be stable in operation period.
Design and Implementation of 2D Elevation Annotation in Hydropower Project Designbased on CATIA/CAA
Authors: Fang Li Yong , Yin Xu Dong , Zhang Hai Huang , Li Hui
Published: January 2014

When CATIA software is used for hydropowerproject design, elevation annotation in 2D drafting workbench is a complicated process that brought extremely inconvenience to designers. In order to solve the problem, a method of 2D elevation annotation based on UDF(user defined feature) is proposed in this paper. Then, a 2D elevation annotation tool based on proposed method is developed and implemented through CAA(Component Application Architecture) development tool of CATIA V5R19 software.At last,several annotation results are illustrated and the developed tool is proven to meet the demands of 2D elevation annotation inhydropowerproject design.
Numerical Study of Wave Climate in Jiangsu Sea Area
Authors: Ding Liang , Fan Fei , Li Jia Rui
Published: January 2014

This paper studied the wave condition of Jiangsu Sea area with wave model SWAN, which was driven by the wind field from 1990.01.01 to 2011.12.30. Firstly, tidal current of Jiangsu sea area was simulated by the Delft3D flow model. Then, wave parameters of East China Sea and Jiangsu sea area were computed, and then buoy data was used to compared with the modeled, they validated well. Last, the average wave height and period are calculated, and the distribution of wave height on each direction was studied. The result shows that the largest annually average wave height of Jiangsu is up to 1.6m. The average wave height is decreasing from southeast to northwest. The wave height in winter is larger than other seasons. In this sea area, waves mainly come from NE and SE directions. Strong waves come from NE or NNE direction.
The Numerical Calculation Based on ABAQUS of Lattice Type Steel Sheet Pile Wharf Structure
Authors: Gui Jin Song , Fu Yu , Bi En Kai
Published: January 2014

This paper uses the world universal finite element software ABAQUS to establish a finite element numerical calculation model of the structure of lattice type steel sheet pile. for the same condition of different soil depth of design elements of lattice type steel sheet pile wharf structure, calculation and analysis of the calculation results and research get the relevant conclusions for reference.
Clustering Analysis Research of Sea Reclamation Scale
Authors: Mao Hai Ying , Hu Cong , Hu Xiao Ming
Published: January 2014

Choosing the development activity of sea reclamation in 11 coastal provinces, cities and autonomous regions of China, according to the characteristics of the scale of sea reclamation during 2002-2012, and using the statistical analysis software SPSS, this paper applies clustering analysis in classifying the development status of sea reclamation in the 11 coastal provinces and cities of China, concludes the growth characteristics of sea reclamation development activity, puts forward the constraining factors which prevent the scale of sea reclamation from growing and the management countermeasures for the development of future sea reclamation activity.
Geodetic Datum Transformation and Inverse Transformation
Authors: Zeng Huai En
Published: January 2014

Geodetic datum transformation and inverse transformation are very basic tasks in geodesy, and surveying engineering, etc. Considering the rotation angles are in seconds, the rotation matrix is simplified, and then the observation equation is easily linearized and solved by least squares technique. The inverse transformation is derived explicitly, which uses the property of rotation matrix and Rodrigues matrix. A numerical case is studied to validate the approaches in the paper.
Optimization of the Installation of an Earth-to-Air Heat Exchanger and Detailed Design of a Dedicated Experimental Set-Up
Authors: Carlucci Salvatore , Cattarin Giulio , Pagliano Lorenzo , Pietrobon Marco
Published: January 2014

Earth-to-Air Heat Exchangers (EAHE) represent a relatively simple technology that can be easily coupled with traditional HVAC systems as well as with hybrid systems in order to exploit the thermal capacity of the ground. The air is pre-heated in the cold season and pre-cooled in the warm season through the EAHE, thus smoothing the peak loads and reducing the primary energy consumption. The present paper presents an experimental set-up of an EAHE implemented in a rural area in the Sicily region, focusing on the selection of the type of soils and the characteristics of the monitoring system installed to collect information on the actual energy performance of the EAHE.
Comparative Study on the Application of High-Density Electrical Method and Ground Penetration Radar in Fault Surveying
Authors: Fayou A. , Zhou Hong Qing
Published: January 2014

In this study, the basic principle of high-density electrical method and the basic theory of ground penetration radar (GPR) are described. The fault surveying at Wudang is taken as an example to summarize the image features of apparent resistivity section of fault and those surveyed by GPR. The applications in fault surveying of the two methods are compared.
Features of Measurement of the Thermal Parameters of Masonry
Authors: Stupishin Leonid U. , Masalov Aleksander V.
Published: January 2014

Features of thermal parameters measuring for various types of masonry and for single stones are presented. Problems are shown that appear during testing of some types of masonry. Tasks are posed for improving of test methods.
Current Situation and Countermeasures of Construction Waste Treatment Resources
Authors: Yang Li
Published: January 2014

Building rubbish has already become a staggering problem in waste products management and environmental pollution.According to the characteristic of building rubbish, the regenerated resources and reclamation management of the building rubbish in developed countries is introduced in this paper. And the corresponding counter measures for building rubbish reclamation management are put forward.
Air Environment and Energy Performance of a Building Courtyard in the Heating Season
Authors: Zhang Ning Bo , Kang Yan Ming , Zhong Ke , Liu Jia Ping
Published: January 2014

Courtyards are now used in many new buildings in China for taking advantage of better natural ventilation and thus improving the microclimate. However, when the building is equipped with a central air-conditioning (AC) system for space heating in winter, the warm air infiltration from the heated rooms enters into the courtyard and leads to changes in the natural ventilation characteristics in the courtyard. In the present study, the air environment and energy performance of a courtyard style office building in Shanghai were monitored in winter. The internal and external environmental parameters such as air temperature, CO2and particle concentrations were measured simultaneously and continuously when the building was heated or was not in use. The results show that when there is no apparent pollutant source in the courtyard, a better microenvironment can be established and the air quality in the space is almost the same as the ambient air, because its natural ventilation is enhanced by the warm air infiltration from the heated rooms. Compared to a building without a courtyard, the building envelope heat loss can be reduced by 20% or 11% in winter for buildings with or without a corridor facing the courtyard enclosed by glass windows, respectively, due to the warm air infiltration which increases the air temperature in the courtyard.
The Impact Mechanism of a Double-Layer Air Circulation System on the Indoor Thermal Environment in Light Steel Structure Residence
Authors: Zeng Yu Sheng , Deng Zhi Qiang , Zhu Yu Xi , Li Jing
Published: January 2014

Based on the structural features of the cold-formed thin-walled steel structure residence, a green environmentally friendly double-layer air circulation system with the respiratory function has been developed to explore the impact mechanism of the system on indoor thermal environment. Various index properties and influencing factors including velocity field, temperature field, PPD-PMV distribution etc, from the various components of the air circulation system during operation by using 3D numerical simulation function of Fluent and Airpak, have been examined, whereby to evaluate the indoor airflow and air quality. Research shows that the buffer layer of air can provide good air source for both the inner and outer air layer; the outer layer of air can dynamically isolate indoor and outdoor heat by taking advantage of stack effect; under the premise of low energy consumption, the utilization of the entire double air circulation system can improve the indoor thermal environment as well as provide 24-hour fresh air for the indoor occupants, so that the purpose of energy saving and environmental protection could be achieved.
Application of Induced Ventilation for Smoke Control in Underground Car Parks
Authors: Fu Jia Jia , Zhang Jing Yan
Published: January 2014

In this paper, the existing methods of ventilation system and smoke control system that used in the underground car parks have been briefly reviewed. Compared to other methods, the impulse ventilation system (IVS) has a lot of advantages, and has great development space in the current. The progresses of research on IVS are summarized, and some key problems (like flow field characteristics, installing parameters of induced fan, influence of space structure to smoke and so on) that have a guiding effect on relevant standard specification are discussed. Some basic principles that followed in the process of layout of IVS are analyzed.
Finite Element Analysis of Thermoelectric Refrigeration on the Heat Surface of the Chip Packaging
Authors: Gao Wen Tao , Luo Qing Hai , Li Gao Feng , Xiao Sheng Hao
Published: January 2014

On the basis of analysis of the principle of thermoelectric refrigeration and the research on the thermoelectric refrigeration technology and the thermal theoretical analysis of electronic components by domestic and foreign scholars, research on thermoelectric cooling of the uniform heat packaging surface from both the surface integral heat radiating and the local hot spot cooling of the chip by finite element numerical simulation and cooling both the chip and the heat from the whole surface of the local hot spots, using the finite element method of numerical simulation techniques Package uniform surface heat thermoelectric cooling study found the thermoelectric cooling hot surfaces in a uniform local cooling effect and temperature distribution, and pointed out that the chip thermoelectric cooling and thermal design layout surface will be in the future to improve the electroniccomponents of a hot heat important research direction.
The Research of Horizontal Resistance Coefficient of Pile Lateral Soil in Horizontal Loads
Authors: Yin Ya Jun , Xie Xue Wen , Qian Yong Mei
Published: January 2014

By finite element method and on the basis of measured data of horizontal static test of pile foundation, the article analyzed horizontal lateral resistance of pile lateral soil under the interaction of piles and soil and horizontal resistance coefficient of foundation soil. The results prove that weighting horizontal resistance coefficient ( m) of foundation soil and the displacement of pile top changed in the reduce of hyperbolic. Meanwhile, it indicates that the constraints of pile top can enhance pile horizontal resistance obviously.
The Study of Shading Technology and Solar Heating in Hot Summer and Cold Winter Region
Authors: Li Jin Bin , Zhao Xiao Wei , Lu Xiao Fei
Published: January 2014

Based on the climate characteristics of the region which is hot in summer and cold in winter , this article introduces a solar energy heating technology, taking Hangzhou as an example and combining the theory of building energy efficiency. It is a collector-tank-double pump cycle of floor heating system, combining solar heating system with solar hot water system. Collectors are concentrating vacuum tube collectors, which can efficiently use solar energy. Combining solar collector with the building integration, we can use solar energy resources, and it can play shading effect.
Grey Analytic Hierarchy X DG Corporate Risk Assessment
Authors: Song Wen Juan , Zhan Bin , Wang Guan Ze
Published: January 2014

First, the gray theory and analytic hierarchy brief overview, and then establish the evaluation index system, using the gray system theory and the analytic hierarchy process AHP gray formed to establish a specific hazardous materials transportation safety risk assessment model, Company X hazardous materials transportation risk evaluation, get the value of the company's risk level, and the evaluation value analysis.
Crowd Evacuation Stability Based on Self-Organized Criticality Theory
Authors: Zhao Rong Yong , Wang Jian , Ling Wei Qing
Published: January 2014

In emergency, the crowd evacuation from public buildings is the most important issue to save human lives. Panic generation and spread normally can lead to the unstable state -stampede during the crowd motion. The stability of crowd evacuation is a complex problem being researched for decades. This paper introduces self-organized criticality(SOC) theory to build the mapping model from a collective crowd into a sand pile with SOC. Therefore, the complex problem of stability analysis for crowd evacuation is converted into sandpiper stability analysis in a relatively simpler way.
Self-Organized Criticality Theory and its Potential Application in High Density Pedestrian Evacuation Simulation in Public Buildings
Authors: Zhao Rong Yong , Li Cui Ling
Published: January 2014

Many important nature evolution phenomena can be explained with Self-organized criticality (SOC) theory. SOC theory explains the tendency of large dissipative systems to drive themselves into a scale-invariant critical state without parameter adjustment. These phenomena are of crucial importance because fractal objects displaying SOC are found. This paper analyzes the characteristics of SOC theory, and then introduces basic principles of SOC theory in one-dimension model. Based on the self-organized criticality owned by the high-density pedestrian evacuation and even the trample event, this paper proposes the potential applications of SOC theory to explain the various phenomena in pedestrian evacuation from public buildings in unconventional emergencies.
Study on the Influence of Crack Anti-Friction Mechanism of Coal Containing Gas on the Process of Disaster-Causing Fracture
Authors: Wu Xin
Published: January 2014

A variety of coal pressure phenomena and coal fracture phenomena are relevant to the coal microcrack evolution, and the gas contained in coal seam makes the crack propagation more complex, therefore the disaster-causing fracture mechanism of coal containing gas urgently needs indepth study. It is found in previous studies, that coal, as a complex structure, when fractures, is not only influenced by its complex structure and mechanical properties of the coal matrix structure, but also influenced by the friction on the crack and the gas molecular force. In this study, it is further believed that in the process of crack propagation, crack tip constantly breaks into new interfaces with high surface energy, and on the new interfaces Van der Waals forces of gas molecules forms the gas adsorption film, which can reduce friction coefficient . The resistance to brittle fracture of coal decreases as the friction coefficient reduces, which makes the crack propagation further develop and accelerates the fracture process of coal containing gas. According to the results, the gas can reduce the macro-mechanical properties of coal and rock mass, which is consistent with previous study, therefore specialized research on the physical and mechanical parameters of gas-containing coal and its disaster-causing mechanism is in urgent need, thus practical production can be accurately guided and evaluated through these researches.
Hazard Assessment of Highways Affected by Debris Flows
Authors: Zou Qiang
Published: January 2014

Roads often run across various drainage basins in mountain areas which include complex geographic and geomorphic conditions. Highways in these areas have been frequently interrupted by debris flows. Without emergency management planning, such debris flows can lead to extensive life and property loss. Through analyzing the hazard effect modes and damage process along highways, we developed three key indexes, scale of debris flows, deposits on highways and river blockage, to describe the highway disasters quantitatively. According to actual investigation, we proposed new methods to determine the value of hazard indexes. Subsequently, we developed the assessment and mapping methods for highways safety by using hazard degree of debris flow. The hazard is graded into 4 grades as extreme low, low hazard, medium and high hazard level. Through applying this method, a case study was carried out on national highway G318 in Xiqu River basin. After analyzing debris flow hazard for the whole highway, the assessment results are consistent with the field surveyed data which indicate actual disaster situation. This hazard method can objectively evaluate the debris-flow hazard along highways, and is useful for highway reconstruction in mountainous areas suffering from active debris flows.
Nonlinear Finite Element Analysis of the Ultimate Bearing Capacity of the Arch Plate Based on the ABAQUS
Authors: Deng Si Hua , Jin Han
Published: January 2014

In this paper, nonlinear analysis of arch plate ultimate bearing capacity and the process of nonlinear ultimate failure were conducted by ABAQUS finite element software. The numerical failure simulation of steels, arch plate under different external loads and the separation of concrete as well as the whole slippage of concrete were operated. A reference for the further design calculations of reinforced concrete arch plate structure is provided as well.
Study on Automatic Drawing and Dimension of Hydraulic Flat Steel Gates on Inventor
Authors: Zhang Shu Jun , Jin Li Hui , Wei Qun
Published: January 2014

A method of automatic drawing and dimensioning for hydraulic flat steel gates, which determines the projection of 3D model and data in two-dimensional space by data graphic method, which orientates by local coordinate system, which automatic dimensions by Brep and location dimension, is presented. Automatic drawing program is written by VB.Net and C# on Inventor API, which can be directly used to practical engineering.
Three-Dimensional CAD Graphics and Virtual Reality File Conversion
Authors: Zheng Chen , Liu Shang Wei , Zhang Shu Jun
Published: January 2014

Using VRML virtual reality modeling language standard steel structure CAD graphics switch into a text file. Making the complex 3D graphics information expressed in VRML environment. Make CAD graphics and VRML file according to the respective standards can use inverse. Drawings transformed into each other to create a practical and effective method.
A Research on the Intelligent System of Plane Steel Gates
Authors: Zhang Li Yi , Wei Qun , Yin Wei Bo , Liu Xing Guang
Published: January 2014

The classification of the main structure is introduced in Hydraulic flat steel gates intelligent design system, shape parameters, attributes parameters and constraints forms of basic components are established, and method of collection, storage and extraction of associated information in related components is invented. Grid line is selected as the skeleton-driven to make all components associated. The methods above-mentioned are used to construct the intelligent design system of Hydraulic flat steel gates, which is built on the Autodesk Inventor, and in which the computation, modeling, automatic detailing are combined, and which has broad application prospects after successful application of certain steel gate design project.
Motion Simulation Platform for the Outdoor Test of the Airborne Spatial Laser Communication
Authors: Meng Lin Xin , Zhao Shan Shan , Zhang Li Zhong
Published: January 2014

A kind of parallel driven swing platform with 3-DOF of rolling, pitching, yawing was introduced in this paper. It could be used to simulate the spatial position character of the airplane or airship to test the APT performance of the laser communication terminal. This kind of platform had the merits with brief configuration, small cubage and mass, big equipment fixing space, especially suited for the outdoor test application. We analyzed the motion relationship of the platform with the inverse kinematics solution and protracted the curve. Meanwhile, the ADAMS was applied to simulate and measured the mechanism, and yielded a same result.
The Application of Equivalent Viscoelastic Artificial Boundary in ANSYS
Authors: Yang Rong
Published: January 2014

Mainly introduces the theory of equivalent viscoelastic artificial boundary and the corresponding parameters of the formula, as well as the equivalent viscoelastic artificial boundary implemented in ANSYS software, and verified by an example of its good accuracy.
The Applicable Study on Cloudy Technology in Steel-Structured Engineering Software Framework
Authors: Liu Shang Wei , Wei Lu Shuang , Zhu Xiao Chao
Published: January 2014

Increasing the volume of the steel-structured engineering practicality as well complexity, steel-structured designing software also will be required to compute massive data with an aim to deal with processing capacity and professional co-processing. With the help of basic conceptions of comprehensive analysis of Cloudy technology in steel structural engineering softwares design, production and installation, combined with the Windows Azure platforms visualizations, this research intends to explore how to take full advantages of the distributed computing software steel industry information service. The optimized framework of steel-structured engineering Cloudy software here is computed from the perspective of technological applications as to address the problem of accumulating experience in a large-scale popularization and application in the steel industry for the future of Cloudy services.
A Mechanism Analysis of Pile-Soil Interaction of Micro-Pile in Building Heightening and Transformation
Authors: Zhang Su Juan
Published: January 2014

Based upon the characteristics of micro-pile in building heightening and transformation (mainly including the mechanism of the press injection increasing the bearing capacity , the rigid connection between micro-pile and its original foundation), through the analysis of its load characteristics in building heightening and transformation, using the theory of pile foundation constructed in reverse order, then the mechanical mechanism of micro-pile and original foundation is studied and the analysis method of soil-pile-foundation (cap) interaction by considering pile tip penetration displacement and soil compression between pile shafts is demonstrated.
Comprehensive Model of Building from the Perspective of Management and Operation of Real Estate
Authors: Česelský Jan
Published: January 2014

A comprehensive model of the building is currently in the Czech Republic in the form of a BIM approach at the beginning and at the stage of slow promotion in the Czech construction environment. In terms of usability in building practice, the issue of BIM in the Czech Republic, mainly because of the increasing pressure on the sustainability of construction, is very desirable and gradually. This approach is used often by multinational construction companies. The article describes the context of the issue of BIM and its use in the management of real estate.
The Game Analysis of Quality Safety Behavior Subjects in Highway Engineering
Authors: Feng Hui Hong , Lu Li , Liu Jun
Published: January 2014

This paper point the research at highway engineering quality safety behavior subjects and analyze the characteristics of the parties based on game theory, build game model, Solve mixed strategy Nash equilibrium; And put forward the effective quality management methods of highway safety behavior implement that strengthening the punishment of highway engineering supervision alliance and the effective use of public media regulator.
Study on Cultivation of Motivation Hygiene Factors in Construction Enterprise
Authors: Ou Ying
Published: January 2014

The situation of the incentive hygiene factors in Chinese construction company was analyzed.The relationship between work efficiency and the motivation hygiene factors of the construction workers were elaborated. Then the importance of the motivation hygiene factors was pointed out.Four mainly motivation hygiene factors are wage,work relation, work environment and job security which affect work efficiency.How to play positive role of the incentive hygiene factors to raise work efficiency are analyzed. The author found methods of cultivation of hygiene factors through the improvement of the working environment,the improvement of the ability of self-protection,the improvement of the salary management and the establishment of stable working relationship.
The Engineering Pricing and Project Bidding Management
Authors: Qin Li Ping , Zhang Zhi Qiang
Published: January 2014

Our current engineering pricing mode and management method still is not standard, the coexistence about all kinds of the engineering pricing method, especially the large problem of pricing method of private project. Our existing engineering pricing also has many unreasonable places in the program, which makes our engineering pricing has become one of the most important channels of Human intervention and corruption. These problems also make a serious distortion of our engineering cost, the "three over" (budget estimates more than estimates, the budget more than estimate, the account more than budget ) is a serious problem. Through a comparative study we can be seen that the bidding is the basic method of the engineering pricing, bidding method is only an auxiliary. But during the use of bidding for engineering pricing, only have the principles and legal in general which is not enough, also need to develop the bidding corresponding management methods and strict management of Engineering bidding. In fact, the project bidding management is one of the important contents during project cost management system.
Research on the Process and Types of the Construction Projects
Authors: Xie Hai , Liu Xuan
Published: January 2014

In the fields of architecture and civil engineering, construction is a process that consists of the building or assembling of infrastructure. Far from being a single activity, large scale construction is a feat of human multitasking. Normally, the job is managed by a project manager, and supervised by a construction manager, design engineer, construction engineer or project architect. For the successful execution of a project, effective planning is essential. Those involved with the design and execution of the infrastructure in question must consider the environmental impact of the job, the successful scheduling, budgeting, construction site safety, availability of building materials, logistics, and inconvenience to the public caused by construction delays and bidding.
The Teaching Mode Reform Exploring of «Engineering Bidding and Contract Management»
Authors: Zhang Su Juan
Published: January 2014

Engineering bidding and contract manegementis a core curriculum of engineering management major, this curriculum has a decisive influence for engineering management major students' whole knowledge system. Search a new teaching mode to adapt to the new curriculum system,which can improve students' ability to analysis problem,the ability to solve problems and practical operating.
Research on Core Competence of Construction Consultant Enterprises Based on the Grey Correlation Method
Authors: Fu Yang , Bi Yan Kui , Wang Shu Jing
Published: January 2014

Abstract.Expounding the connotation of the core competence of construction consultant enterprises and establishing the evaluation index system about core competence of construction consultant enterprises from five aspects which are the management,technology,economic benefit,human resources and market development.Using entropy weight method to determine the evaluation indexes weight, then applying grey correlation method to evaluate and compare the core competence by four enterprises.
Experiment Study on Bearing Capacity of Muddy Dolostone Foundation
Authors: Chen Yang , Huang Zhi Hong
Published: January 2014

In recent decades，there have been detailed investigations of bearing capacity of muddy dolostone through in-suit static load and uniaxial compressive strength．By analyzing test datas，the vertical bearing capacity, uniaxial compression and water ratio were studied．The bearing capacity which will be performed on slight , medium、strong weathering ,muddy dolostone．By the fact that the single axis compression strength and the water ratio experiment study to the slight weathering 、the medium weathering 、the strong weathering muddy dolostone, explain that making use of fitting equation to come to oppose guessing the bearing capacity of the foundation, is feasible，above all for medium and strong weathering muddy dolostone．
Based on the System Dynamics Construction Phase of the Project Cost Control Study
Authors: Yan Wen Zhou , Chen Peng
Published: January 2014

The traditional method of project cost control management by objectives based, is a passive expost control, and system dynamics model through the establishment of a strategiclevel description of the project, emphasizing the active control of project costs, focused on the complexity of factors that are difficult to accurately quantify analysis is an important complement to traditional methods. Construction phase of the project cost control of construction project management is one of the main construction phase of the construction project in accordance with established cost control feedback effect diagram, analyze the main factors affecting cost control, qualitative analysis of the impact of the construction phase of the project cost control various factors and cost control effect brought. Proven system dynamics approach applied in the construction phase of the project feasibility.
Study on the Relation between Uniaxial Compressive Strength and Point Load Strength
Authors: Wang Rui Hong , Jiang Yu Zhou , Guo Jin Long , Tang Tian Cai
Published: January 2014

In order to investigate the relation between uniaxial compressive strength and point load strength, several homogeneous rock specimens were tested, and the influence of the different rock type was investigated using regression analysis and the derived equations were statistically tested. The test result show that there are some correlations and trends between uniaxial compressive strength and point load strength, the shape size and lithology of rock specimens have important influence on the result of point load test, and the greain size, the mineral compositon and the structral compact are key factors. It is difficult to realize that using one or several function to describe all internal relations between uniaxial compressive strength and point load strength.
A Seismic Evidence for the Reliability of the 3-D Stress Measurement by Hydraulic Fracturing
Authors: Xu Jun Shan
Published: January 2014

Determining the in-situ stress of wall rock is important for the underground cavern project. The three-dimensional (3-D) stress measurement, which is obtained by hydraulic fracturing stress measurement via measuring the stresses in boreholes with three different orientations, has been applied for the designation of cavern project. However, there are few examples that can demonstrate the reliability of 3-D stress measurement method. In this study, we showed one example of the 3-D stress results measured by hydraulic fracturing in Western China. The measured results, especially the dip angles of the maximum principle stress are consistent with those determined by focal mechanism of nearby earthquakes. This consistence indicates the reliability of the 3-D stress results by hydraulic fracturing and an expected application for regional geostress study.
Impact of Coupling Beams on Shearing Force of Micro-Pile Group in Landslide
Authors: Wang Shu Feng
Published: January 2014

In recent years, micro-pile has been widely applied to landslide treatment engineering due to its advantages in application and construction, with quite evident engineering effect. Different geological experts have focused on sundry research direction on its resistance mechanism. Based on results from numerical simulation, shearing forces of micro-pile in landslide treatment engineering with and without coupling beams were analyzed, all of which are hoped to reveal the impact of coupling beams between the top of the piles on shearing force of micro-pile group in landslide. Results from contradistinction showed that coupling beam played greater role with shearing force to segment piles, comparing with less to the force near the sliding surface. Without coupling beams, shearing force of each pile from each row suffered quite different, comparing to that of small differences with beams. With no coupling beams, first damage points were located under top of the piles at about six times the pile diameter.
Numerical Analysis of Soil Slope in Consideration of Creep Property
Authors: Wang Qing Huan , Li Yong Quan
Published: January 2014

Drucker-Prager Model in consideration of creep property is deduced in detail, and the finite element model under Coupled Deformation and Seepage Fields is developed, which takes into account the effect of plastic deformation, saturation and void ratio on the properties of soil materials, the effect of water and soil interaction. The deformation of one soil slope is calculated by FEM during seepage. The results calculated show that the displacements calculated completely agree with the objective law. The way used may provide reference to engineering practice.
Prefabricated Structures Surface Marble Rheological Tests and Constitutive Model Analysis
Authors: Xu Qing , He Jiang Da , Xie Hong Qiang , Xiao Ming Li , Liu Jian Feng
Published: January 2014

The mechanical properties of intact rock and rock containing structural plane are very different. From the diversion tunnel of Jinping deep rock site to retrieve the complete block of marble, after a high confining pressure triaxial compression simulation tectonic movements, the formation of structural plane, it represents the mechanical properties of the original rock. On the surface of the marble structure containing triaxial compression creep tests, the results showed: at low confining pressure, the weak marble surface as micro-damage accumulation, the emergence of non-uniform partial destruction, while at high confining pressure, creep curve better continuity and integrity; different confining pressures, marble initial rheology and stability both appear rheological phase, accelerated phase rheological obvious; different confining pressures, the same stage of the axial stress steady flow rate compared with the confining pressure increases, the axial steady state flow rate becomes smaller; marble under test showed the rheological properties, the use of Nishihara model can better demonstrate the rheological properties and determine the rheological parameters for other practical engineering reference.
The Study of Sand Hole Collapse Mechanism
Authors: Zhang Jin Tuan , Meng Dong Lin , Wang Hai Xiang
Published: January 2014

When constructed the bored pile in sand layer, it is easily to appear the under-reaming and hole collapsed phenomenon. Then it will lead to the engineering disasters, such as hole collapsed, burying drilling and super party amount of concrete. Through the mechanics analysis of the fine sand in the hole process, we found that the mud turbulence will be broken in the drilling process which can cause the water in the hole to be turbulent fluctuation. The result of turbulent fluctuation is making the slurry wall inside and outside the test pressure difference exceeds the wall shear strength which results in the wall off block. At the end, the sand soil collapse dropping leads to the engineering disaster.