bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation on the Three-Dimensional Seepage Field of Zhelamuqing Tailings Dam
Authors: Xie Jian Bin , Fan Jing , Wang Zhi Liang , Liu Wen Lian , Hu Jing You
Published: December 2012

Based on the engineering geological, hydrogeological conditions and survey results of Zhelamuqing tailings dam, two types seepage problems in the tailings dam which are saturated seepage and saturated - unsaturated seepage were described and solved by Darcy law and Richards Equation respectively. Then the three-dimensional seepage field of tailings dam under steady saturated state was simulated by finite element method (FEM). And the seepage line of saturated - unsaturated seepage field in the tailings dam was simulated and predicted by numerical analysis method when the embankment is enduring the flood. Subsequently, the simulated seepage line of saturated - unsaturated seepage field in the tailings dam was verified by the survey result. Results show that it is feasible to describe the saturated seepage and saturated - unsaturated seepage by means of Darcy law and Richards Equation respectively and it is effective to simulate the three-dimensional seepage field of tailings dam under steady saturated state by using the finite element software Midas GTS. Results also show that the simulated seepage line of saturated - unsaturated seepage field in the tailings dam agree with the survey result.
On the Basis of High Vacuum Densification Method in Dalian Coastal Soft Soil Analysis
Authors: Yin Dan , Zhang Bin , Tao Yan
Published: December 2012

Analysis and study high vacuum densification method in the application of soft soil foundation. According to the engineering characteristic and strength characteristics of Dalian coastal area soft soil, using the finite element analysis software ADINA to simulate the high vacuum densification method effect, obtain the changes of foundation displacement, pore water pressure and effective stress. Finally putting forward a reasonable and applicable design according to the processing method of the quality, time limit for a project, cost, environmental protection and so on.
Numerical Simulation of Slope Stability Analysis of Open Pit Coal Mine Based on MIDAS/GTS
Authors: Liu Chong Xian , Gao Yong Tao
Published: December 2012

Based on mining area end slope stability evaluation engineer- ing of Pingshuo East open pit coal mine in Shanxi Province, ac- cording to the status quo of the North Slope of the first mining district of the East open pit coal mine as well as engineering g- eological investigation results, this article selected a represen- tative cross-section of the North Slope,adopted processing fu- nctions of finite element analysis software MIDAS/GTS, and re- spectively analyze slope stability under three conditions of the mining area of the initial excavation,backfilling and disposal,a- nd follow-up excavation.The paper concluded that Initial exca- vation caused slope instability; backfill slope is stable after di- sposal; follow-up excavation has essentially no effect on slope stability. The establishment and analysis are much closer to t- he real situation, objectively reflect the distribution of slope s- tability of the East open pit coal mine, and provide a design for open pit production safety.
Analysis of the Working Characteristics of High-Pile Wharf Pile Foundation under Berthing Load
Authors: Xie Yao Feng , Tang Wei Qing , Tang Jie Ping
Published: December 2012

In order to study the working characteristics of high-pile wharf pile foundation under berthing load, our team conducted the field test and established the numerical models. Analyzing the data from the test and models, the relationship between load and displacement of piles was deduced primarily. It’s proven to be usability.
Slope Stability Analysis Based on Limit Equilibrium and Numerical Analysis
Authors: Jiang Kai Yu , Cao Jing , Ma Yue
Published: December 2012

Based on the background of a foundation pit slope of the tertiary strong weathered basalt(TSWB), a quantitative analysis of the slope stability is proposed by combination of the limit equilibrium and the numerical analysis. The analysis also considers the effects of the natural state and soaking state Then, as an example, an ultra-deep foundation pit slope (UFPS) is analyzed under the background of TSWB. The Janbu method is used in the limit equilibrium because it can meet all the equilibrium conditions, including the force and moment equilibrium equation. The Lagrangian difference method which based on shear strength reduction is adopted in numerical analysis. Some meaningful conclusions can be obtained through comparing analysis the calculation results of Janbu method with finite difference method. These conclusions can be given a reference to similar projects.
Preliminary Experimental Study of the Seismic Behavior of Reinforced Concrete Column with Distributed-Steel Bar
Authors: Ye Mao , Pi Yin Pei , Ren Min
Published: December 2012

A distributed–Steel Bar Reinforced Concrete (DSBRC) column was tested, a construction technique for composite steel and concrete material which can alleviate the difficulty for the arrangement of the stirrup in the column and the longitudinal reinforcement in the beam. An ordinary steel Reinforced Concrete (SRC) column was also tested for comparison. The specimens were subjected to quasi-static load reversals to model the earthquake effect. The hysteresis curve, resistance recession, skeleton curves and ductility ratio of columns were obtained. The experimental results present good seismic behavior of DSBRC column under cyclic loading as the square cross-section SRC column. Therefore it would be a good substitute of SRC column in civil engineering.
Seismic Response Analysis of Containment with Hemisphere Dome for Advanced Nuclear Power Station
Authors: Liu Fang
Published: December 2012

Nuclear Power Station is the last bulwark of the nuclear reactors, and the seriousness of the consequences due to the damage and the enormous impact of human psychology, the seismic response analysis of nuclear power plants is essential. MIDAS/Gen finite element model of the structure of the space, for example, a nuclear power plant, the power of the research containment structure under horizontal seismic response characteristics and undermine the law, the natural frequency of the structure, shapes characteristics, structure the displacement distribution parameters, provides a basis for the design of the structure and to provide a reference for similar studies.
Two-Stage Design Method for Multi-Story Structures Equipped Metal Dampers, Part I: Theory
Authors: Song Jing Xu , Pan Wen
Published: December 2012

The two-stage design method for multi-story structures equipped metal dampers is put forward based on the Code for Seismic Design of Buildings (GB50011-2010) and the Code of Japan Society of Seismic Isolation. For preliminary design stage, simplified method is adopted to estimate added stiffness and damping on each story, offering an approximate requirement of dampers. For detail design, the time history analysis is employed to verify the performance of structure with added dampers and determine number of energy dissipation device. This new method will be valuable for enhancing design quality and reducing design period. This paper describes the theoretical basis of the method.
A Novel Seismic Base Isolation System Consisting of a Lead Rubber Bearing in Series with a Friction Slider. Part I: Nonlinear Modeling of the System
Authors: Cancellara Donato , de Angelis Fabio , Pasquino Mario
Published: December 2012

In this paper a new seismic base isolator, called High Damping Hybrid Seismic Isolator (HDHSI), is proposed. It is obtained by the assembly in series of a Lead Rubber Bearing (LRB) and a Friction Slider (FS) with a high friction coefficient. The HDHSI device is in contrast with the Resilient-Friction Base Isolator (R-FBI) with the aim of optimizing the Electricité De France (EDF) system. The mathematical model of a structure base isolated by a HDHSI system is analyzed with a two Degree of Freedom System (2-DOF) in which the superstructure is assimilated to a rigid body. Nonlinear finite elements are adopted for modeling the HDHSI device. A dynamic nonlinear analysis is performed and the hysteretic cycles are derived and evaluated for the single components and for the innovative HDHSI device.
Assessment of the Torsion Effect in Asymmetric Buildings under Seismic Loading
Authors: Bensalah Mohamed Draidi , Bensaibi Mahmoud , Modaressi Arezou
Published: December 2012

According to the recent earthquakes, the asymmetric buildings suffer from severe damages caused by increased torsional response. The new seismic codes try to take into account this effect and during the modeling it is difficult to assess all the parameters that have an influence on the behavior of this kind of structures. In this work, a study on the influence of the effects of torsion on the behavior of structure is done. The proposed structures consist of an irregular 3-storey reinforced concrete frame with infinitely rigid slabs. The uncertainties of input parameters, such as seismic Arias intensity, peak ground acceleration, predominant period and output ones such as, inter-story Drift, and dynamic eccentricity upon the torsion is investigated. Using a finite element code, dynamic linear and non linear time analysis and pushover analysis have been performed, based on 116 seismic records with a magnitude varying between 6.2 and 7.7.
Nonlinear Seismic Response Analysis of Parallel Base-Isolated System
Authors: Rong Q.
Published: December 2012

Based on the bilinear hysteretic model, the elastic-plastic time history analysis of single mass point for parallel base isolation system is carried out. The approximate treatment method of the inflexion point is introduced and the formula of each energy consumption for parallel base-isolated structure is given. Through an engineering example, the time history curve of each energy dissipation for parallel base-isolated system is drawn, and the isolation effect is given.
A Structural Identification Method Based on Recurrent Neural Network and Auto-Regressive and Moving Average Model
Authors: Xu Jing , Wang Xiu Li
Published: December 2012

The work presented a structural identification method based on recurrent neural network and auto-regressive and moving average model. The proposed approach involves two steps. The first step is to build a recurrent neural network to map the complex nonlinear relation between the excitations and responses of the structure-unknown system by on-line learning . The second step is to propose a procedure to determine the modal parameters of the structure from the trained neural networks. The dynamic characteristics of the structure are directly evaluated from the weighting matrices of the trained recurrent neural network. Furthermore, a illustrative example demonstrates the feasibility of using the proposed method to identify modal parameters of structure-unknown systems.
The Dynamic Monitoring of Coal Mining Seeper Subsidence District Based on RS and GIS Technology — A Case Study of Huainan City
Authors: Zhang Hong Mei , Gao Yang
Published: December 2012

Using the 1987 TM and 2006 ETM+ remote sensing images and other related ancillary geographical data of Huainan city, combined with GIS Technology, the dynamic change of the coal mining subsidence of Huainan city was extracted. In order to unify the two period image data difference because of the different date, the research used modified normalized difference water index (MNDWI) to get the information of seeper subsidence in coal mining district. Using the change detection function of RS, Combined with the spatial analysis and statistics function of GIS, all the subsidence area of coal mining district and the seeper subsidence area were extracted. The research shows that the seeper subsidence extent is different because of the mining period, scale, method, groundwater level and groundwater extraction, surface coverage, roof’s management and other coal seam geological environments, especially dip angle of coal seam. The Xiejiaji and Bagongshan mine’s mining seeper subsidence are the serious due to its bigger dip angle of coal seam, the seeper subsidence percentage are 38.57%, 25.95% respectively, while Jiulonggang- Datong mining seeper subsidence is the least even if it’s the oldest and abandoned mine in Huainan.
Precision Evaluation of Georobot Automatic Continuous Deformation Monitoring
Authors: Jiang Jun , Zeng Huai En , Li Xuan , Yu Li Ming , Li Shi Gui , Hu Da Ru , Wu Juan Juan
Published: December 2012

Georobot is widely used to precision engineering measurement, especially in automatic continuous deformation monitoring, e.g. dam and landslide deformation monitoring, in virtue of the unique ATR and tracking technology. However it is hard to evaluate the actual tracking measurement precision because of the complex circumstance in specific application. The paper designs reasonable experiments solution, including test of tracking measurement of the stationary target point for the positioning precision and test of tracking measurement of the regular shape for the measuring deformation precision. The experiment result shows the positioning precision and measuring deformation precision both can reach the sub-millimeter level if centering error is eliminated, otherwise maybe in about 1.5mm level. It validates the reliability and efficiency of Georobot in automatic continuous deformation monitoring.
Test Study on Effect of Joint on Rock Mass Mechanical Property
Authors: Liu Hong Yan , Huang Yu Shi , Dan Zeng Zuo Ma
Published: December 2012

Strength, elastic modulus and failure modes of samples with different joint dip angle, joint continuity degree, joint set and joint width under uniaxial compressive load are studied by similar material tests. To the sample with single joint, its strength, elastic modulus and failure mode are controlled by joint dip angle to much extent, and it will shear and slip along or split across joint face to fail, in which sample’s strength and elastic modulus is minimum corresponding to the first failure mode. To the jointed sample with different joint continuity degree, its strength and elastic modulus decrease with joint continuity degree, and effect on sample’s strength is much more serious. With increase of joint set, sample’s strength and elastic modulus gradually decrease. With increase of joint width, strength and elastic modulus decreases, and effect on sample’s strength is much more serious.
The Modern Current Sensors of Synthetic Magnetic Resin
Authors: Lokvenc Jaroslav , Drtina René , Šedivý Josef
Published: December 2012

The article presents previously unpublished results of the development of cold-cast magnetic materials and their potential application for the purpose of measuring the electricity and power electronics. Listed are the basic characteristics of magnetic resins, principled design sensor dI/dt with a core of magnetic material and cast measurements industrially manufactured prototype
Application of Pumping Operation Models for a Drainage System
Authors: Wei Chih Chiang
Published: December 2012

A pumping operation model has been developed in urban areas caused by the storm runoff. The Chung-Kong pumping station in New Taipei City is used as a case study, where storm and operating records are used to train and verify the model’s performance. Historical records contain information of rainfall amounts, inner water levels, and pump and gate operating records in torrential rain events. The results show that the case with lag time of 15 min gives the better forecasted pumping discharge than other cases. The proposed predicting pumping model successfully addresses the problems of forecasted pumping discharge.
The Relationship and Regression Analysis of Urban Water Supply and Temperature
Authors: Shi Heng Hua , Weng Wen Guo , Zhai Zheng Gan , Li Yuan Yuan
Published: December 2012

Urban water supply system and the people’s daily life are closely related. In addition to the urban population, the structure and the scale of economic, the factors affecting the requirement of urban water supply included the meteorological factors such as temperature. Based on Pearson product-moment correlation coefficient, we analyze the relationship between urban water supply and temperature with the actual data of Beijing from 2008 year to 2009 year, and get regression fitting function with multiple regression analysis method. The analysis result can provide the basis for scientific management and accurately predict urban water supply.
The Underground Water Quality Evaluation from Electrical Logging Data in Sandstone District: A Case Study in Daqing Oil Field
Authors: Huang Zhao Hui , Zou Chang Chun , Chen Zhen Ya
Published: December 2012

As an important yardstick of water quality evaluation, total dissolved solids (TDS) is strongly correlated with apparent resistivity and static spontaneous potential (SSP) parameters from electrical logging curves.A lot of electrical logging data accumated in the hydrogeologic survey during last decades can be used to predict the underground water TDS. Based on electrical characteristic analysis of sandstone reservoir, taking the influfential factors of the Archie’s Equation and creation mechanism of spontaneous potential (SP) as starting points, the theoretical relationship between the underground water TDS and formation resistivity (Rt) without considering the infuence of the porosity is modeled in this paper, and also the relationship between the underground water TDS and SSP in the same section of drilling well. Utilizing the apparent resistivity logging and static potential logging data, and employing the numerical fitting method, the relationship between groundwater TDS and conductivity is analyzed and determined, finally, the electrical parameters of determining the water quality and the regional evaluation of water quality are expounded in Daqing oil field,songliao plain Quaternary sandstone aquifer.
Comprehensive Evaluation of the Coupling Construction Progress and Quality of High Core Rockfill Dam
Authors: Cui Bo , Liu Ning , Zhao Chen Sheng
Published: December 2012

Construction progress and quality are two important objectives in the construction of high core rockfill dam. It is of great significance to evaluate their control effect comprehensively. In this paper, the progress and quality of high core rockfill dam construction management are the study objectives. in order to achieve the real-time control of coupling them, the comprehensive evaluation method for the quantitative analysis of their complex relationship is proposed. Based on the comprehensive analysis of the mechanisms of the influence related factors in the construction process, the comprehensive evaluation index system of the high core rockfill dam coupling construction progress and quality is designed ; the comprehensive evaluation index data acquisition process is analyzed; the comprehensive evaluation method for the high core rockfill dam filling unit is put forward. finally, a comprehensive evaluation of high core rockfill dam filling unit model based on TOPSIS is established. Engineering examples show that this method plays a guiding role in real-time control of coupling high core rockfill dam construction progress and quality.
A Study of Hydraulic Characteristics of Multi-Square-Hole Orifice Plates
Authors: Dong Zhi Yong , Yang Yong Gang , Chen Qi Qi , Shi Bin
Published: December 2012

This paper experimentally investigated hydraulic characteristics in working section of multi-square-hole orifice plates of hydrodynamic cavitation reactor by use of three-dimensional Particle Image Velocimetry (PIV) and High Speed Photography etc. Arrangements of holes in the orifice plates can be divided into diagonal, cross and checkerboard categories. The three-dimensional velocity distribution, pressure and cavitation characteristics for each arrangement of multi-hole orifice plates were measured by PIV system, pressure data acquisition system and high speed camera, and a comparison of hydraulic characteristics of the three categories of arrangements of the multi-hole orifice plates were made.
Research Progress of Annular Flume Technology
Authors: Cao Kun , Shao Yu Yang , Tong Chao Feng , Jiang Zhong Lian
Published: December 2012

The background and principle of the annular flume technology were introduced. A complete literature review of the research progress by using the annular flume in China and other countries was presented including annular flume numerical simulation, experiments on the scene etc. On the basis of the existing progress, the potential application prospects of annular flume technology in the study of cohesive sediment characteristics are summarized briefly.
Dynamic Deformation Behavior and Life Analysis of Green Reinforced Gabion Retaining Wall
Authors: Lin Yu Liang , Yang Guo Lin
Published: December 2012

In order to study dynamic deformation behavior of green reinforced gabion retaining wall, lab test was carried out and the dynamic loads of 4 frequencies and 4 amplitudes were imposed. The total cycles of dynamic load reached 2 million. Lateral and vertical deformation behaviors of green reinforced gabion retaining wall were investigated, and the main factors which influenced the dynamic deformation behavior and their significance were obtained. Meanwhile, fatigue life analysis on green reinforced gabion retaining wall was made. The results show that dynamic deformation is greatly affected by amplitude and the cycles of dynamic load, not significantly affected by frequency. The maximum lateral and vertical deformation occur in the fifth layer of green reinforced gabion wall. With the increase of train load and train speed, fatigue damage and fatigue life of green reinforced gabion retaining wall can be estimated based on accumulative fatigue damage theory.
The Groundwater Quality Evaluation and Analysis of its Changing Trend in Major Cities of Xinjiang
Authors: Li Qiao , Jia Rui Liang , Zhou Jin Long
Published: December 2012

In order to identify the main factors causing the changes of groundwater quality in major cities of Xinjiang and provide the basis for the prevention and control of groundwater pollution, the monitoring statistics of 17 groundwater samples from the same positions or similar positions in nine major cities of Xinjiang in April-June 2003 and in October-November 2011 are used to classify the groundwater quality of the nine cities in 2003 and 2011 by the “one vote veto” system. The groundwater quality is evaluated with city as the basic unit and according to Quality Standard for Groundwater (GB/T 14848-93). Meanwhile, the changing trend of the major ions in the groundwater is analyzed. The results show: the overall quality of the groundwater of each city was good in 2003 but deteriorated seriously in 2011; Urumqi and Shihezi were the cities where the groundwater quality was seriously deteriorated; the concentrations of most ions and other quality indices in the groundwater all presented a rising trend
Mode Identification of Water Resources Sustainable Utilization in Dianchi Basin
Authors: He Shi Hua , Cheng Guai Mei , Zou Jin
Published: December 2012

The multi-objective decision methodology is employed to identify the water resources sustainable utilization (WRSU) mode in Dianchi basin, Kunming. The regional water resources development and utilization is treated as a continuous process for a long-term span. a multi-objective decision model of WRSU is established, which pursues the main objectives including economic growth, environmental improvement and social development and subjects them to the carrying capacity of water resources and the dependant relation of economic, environmental and social development on water resources. The time-varying dynamic evolution characteristics of the trade-off rate between the objectives are analyzed according to decision-makers’ different preference structures during the process of water resources utilization. In the light of Dianchi basin reality, the preferred program of WRSU in the basin is obtained and the coordination between the objectives of WRSU is revealed. A feasible and valid approach is proposed for the sustainability identification and appraisal of water resources utilization.
Smeared Crack Model Based on Point Interpolation Meshless Method
Authors: Zhang Yan
Published: December 2012

Based on the tensile feature and rupture mechanism, the point interpolation meshless algorithm of smeared crack model is proposed. When the displacement of crack opening and the fracture energy are smeared into the node influence area, the calculation results vary with the size of the node influence area which is called size effect. According to the conversation law of fracture energy, the solution of size effect of simulation of tensile crack process using the blunt crack band model is proposed and verified through a numerical test of concrete three-point bend beam.
Design of Air-Conditioning System and Ventilation System in Web Press Workshop of One Printing Plant
Authors: Zhang Zi Jing , Wen Bo , Lv Zhi Dong
Published: December 2012

Air-conditioning and ventilation system which control temperature and humidity was designed in this paper. Its aim was to ensure the production process and meet the comfort requirements of workers. Considering that web press equipment load account for large proportion of the total load, we separated out the area of web press and the waste heat was discharged by ventilation system. We adopted Stratified air conditioning on the remaining area because the whole workshop is large space. By means of calculation, energy saving rate of stratified air conditioning system is 25.6% and the refrigerating capacity is reduced by this way of design. Energy-saving effect is remarkable. So it’s a good method to energy conservation.
The Relationship Analysis of Temperature and Electric Load
Authors: Shi Heng Hua , Weng Wen Guo , Zhai Zheng Gan , Zhang Xiao Le
Published: December 2012

With the improvement of the living standard of the people and the limit of the electric power supply, the shortage problem of the electric power are more and more serious in large cities. There are many factors affecting the requirement of urban electric power supply such as urban population, the structure and the scale of economic, the he weather conditions, etc. Based on the actual data of Beijing from 2008 year to 2009 year, we quantitatively analyze the relationship of temperature and electric load with regression analysis method. The result can provide the changing rules of the electric load with temperature and give some suggestions on improving urban electric power supply.
Explicit Model for Cumulative Pore Pressure of Saturated Soft Clay
Authors: Yao Zhao Ming , Chen Jun Hao
Published: December 2012

The principal stress axial would cyclic rotate when the moving pressure passed. In order to analyze long-term settlement of the ground subjected to traffic loading, the simplified method based on explicit model for predicting the accumulative deformations is usually preferred. The traditional model could not reflect the phenomenon of principal stress rotation. After the axial stress controlled equation and circumferential shear stress controlled equation were derived, A series of consolidated undrained cyclic shear tests were performed under the condition that the general shear stress value was constant and the principal stress angle was rotating. The explicit pore pressure model reference was verified to calculate the accumulative pore pressure caused by the principal stress axial cyclic loading.
Technical Indexes for Planning of Disaster-Mitigation Emergency Congregate Shelter in Villages and Small Towns
Authors: Chu Jian Yu , Lu Lu , Su You Po
Published: December 2012

Compared with cities in China, emergency evacuation and rescue in villages and towns are more difficult, and the technical indexes for planning of urban emergency shelters cannot be copied. Through studied experiences in emergency shelters planning and construction from home and abroad, and combining China’s conditions, this paper proposes types, functions, sizes and scope of service of disaster-mitigation emergency congregate shelter in villages and small towns in China, as well as arrangements of emergency facilities and requirements for planning.
The Research of Water Effect on Infrared Radiation of Concrete Failure Process
Authors: Zhang Yan Bo , Chen Bin Bin , Jing Guang Hui
Published: December 2012

To study the features of infrared radiation of concrete fracturing water seepage and water inrush process ,concrete is pressurized with no water press and water press to uniaxial compressive stress .The experimental results show seepage point of concrete block in the process of destruction of water inrush with different characteristics.The IR radiation of seepage point shows an rise in early term, then partial low temperature, and rise in late term.Before water seepage water pressure let heating increase slowly, when water seepage makes temperature drop low in the water seepage point and it‘s aslo the reason of concrete water seepage and water inrush come early .Base on the experimental results, the mechanism of infrared radiation in no water press and water press are analyzed,the difference between them also be discussed.The experimental results are useful for infrared remote monitoring and disaster warning on concrete projects.
Fractal Analysis on Shear Strength Properties of Bulky Rock Material in Waste Dump
Authors: Liang Wei , Hou Ke Peng , Du Jun , Li Ke Gang
Published: December 2012

The shear strength properties of bulky rock material were studied by the fractal geometry theory. The results show that: (1)The research indicates that the fractal dimension D can be a quantitative parameter of the particle composition of bulky rock material.and there was a clear linear correlation between the D and particle size distribution when bulky rock material was at good gradation.(2) Curve of stress-strain relationship had no obvious peak strength and it was strain-hardening. Gfailur and fractal dimension D have a obvious negative exponent relation while bulky rock material at the good gradation.(3) There was a negative exponent relation between φ and D at good gradation,but relationship of c and D was relatively disperse.
Research on Risk Assessment of Vessel-Bridge Collision Accident in Inland Waterway
Authors: Zhang Dan , Yang Xiang Rui , Fan Xiao Biao
Published: December 2012

The Ship-Bridge collision accident risk evaluation model based on the analytic hierarchy process (AHP) was established and the weights of factors were confirmed. Qualitative and quantitative assessments of the Vessel-Bridge collision accident risk level were accomplished. The application results show that the possibility of Ship-Bridge collision accident could be evaluated by the security risk evaluation model based on the AHP. It can provide decision-making suggestions for the sitting of the new bridge and optimal evaluation for bridge type scheme.
Numerical Study of Smoke Control for Underground Platform in a High-Speed Railway Station
Authors: Yang Hua , Yuen Richard , Zhang He Ping
Published: December 2012

Smoke control for the underground platform of a high-speed railway station was investigated. Nowadays, the development of high-speed railway in China is rapid. In order to economize valuable urban space and to realize the convenient interchange to the subway, some of the high-speed railway station platforms and transfer halls are set underground. It is difficult and uneconomic to achieve static ventilation in the underground platform. Therefore, The mechanical smoke control system is the most feasible and most reliable method to ensure the fire safety of the underground platform. How to protect the evacuation stairs free from the threat of fire-induced smoke is a major concern of smoke control in the underground platform. An underground island platform and underground waiting and transfer halls of an under construct high-speed railway station in south China are reconstructed in this paper. Three smoke control modes based on mechanical ventilation, namely mechanical air makeup, pressurized air supply for stairwell and air curtain, are numerically simulated by Computational Fluid Dynamics (CFD) method. The distribution of smoke, temperature, and CO in the platform and influences of them on evacuation staircases are computed and analyzed. The effect of fire location in smoke spread are explored in our research. This study based on CFD modeling enables the improvement of the design and operation of smoke control and exhaust system for underground high-speed railway station. The results are applicable to practical fire engineering designs for underground high-speed railway station platform.
Application of Bpsim.DSS System for Decision Support in a Construction Corporation
Authors: Aksyonova Konstantin , Bykov Eugene , Aksyonova Olga , Kai Wang
Published: December 2012

The paper focuses on development and application of a decision support system BPsim.DSS, which greatly simplifies analysts work and allows them make their job more efficiently and allows prediction of consequences of taken decisions. Paper gives an example of the system deployment in production environment, a construction company and presents achieved results.
3-D Object Projection Method of Multi-Camera Revolve Batch Rendering
Authors: Bai Xiao Ming , Xie Xiao Fang , Yu Ji Hong
Published: December 2012

3-D object recognition was different from 2-D one. In order to improve recognition rate, it was necessary to establish a full features base. With object as center, the paper offered a view space projection method of Multi-Camera Revolve Batch Rendering. Firstly, constructed three dimensional models for object, set positions for model and camera of top view. Then by the max panel stick to one of axis angle, copied camera with equal interval. Set up the moving path for hemisphere, and constraint to corresponding camera. In the last, established batch script with output parameters, automatic preservation random projection images for three dimensional objects.
An Improved Map Matching Algorithm
Authors: Kang Xiao Feng , Wu Wei Ying
Published: December 2012

Mistakes often occurs in map matching when road condition is complex, especially there is island ring, or exit and entrance of highway, in vehicle navigation system. Wrong map matching will lead to wrong map display and wrong route guidance, thus system gives a bad impact to driver. In order to solve this problem, this paper includes an improved map matching algorithm based on NDS, which takes curvature and slope into account. This Algorithm coding has been realized by c and proved its availability at last.
Free Software for Development of Web GIS in Tourism Accessibility
Authors: Françoso Maria Teresa , Costa Diogenes Cortijo , Valin Mariana Mello , Amarante Rogério Rodrigues
Published: December 2012

Based on the concepts of social inclusion, universal design, and accessibility, this paper aims to describe the stages of the development and implementation of a Geographic Information System for the Internet (Web GIS) based on open source (OS) software. The Web GIS developed is called "Accessibility to Campinas Tourist Attractions", which provides information about cultural and natural attractions in Campinas/SP- Brazil, especially for people with disabilities or reduced mobility that prevents access these sites via public and private transportation. The verification of the existence or lack of accessibility equipment at bus stops and parking areas close to tourist attractions relies on current legislation (NBR 9050) that establishes the right to accessibility for disabled people to transportation, local culture, and leisure.
A Comprehensive Evaluation Study of Green Building Degree Based on the Fuzzy Comprehensive Evaluation
Authors: Bao Xue Ying , Wang Qi Cai
Published: December 2012

According to the evaluation standard for greening building, an assessment system is proposed to evaluate the green building degree. And the weights of each evaluation index are determined by AHP method. Applying the methods of expert estimations, a fuzzy comprehensive evaluation model is constructed for the building green degree. Combining with living examples, the green degree of a building is calculated based on this method.
The Statistical Analysis of Safe Behavior Habits' Culturing Methods on Construction Workers
Authors: Yang Gao Sheng , Ju Jie
Published: December 2012

The construction workers' unsafe behavior is the direct cause of security incidents. Analysis the formation mechanism of construction workers' unsafe behavior from the perspective of behavior psychology,and find out the factors affecting the safe behavior of construction workers ,among the factors,the most critical is fostering safe behavior habits. Through the questionnaire survey on the management of the building units in Nanjing and using the SPSS software to conduct the statistical analysis of the four methods of fostering safe behavior habits. The conclusion is that the safe education and training is the most important to foster safe behavior habits. At last,the paper gives the feasible measures combined with foreign experience in safety training mode.
The Teaching Exploration of Bridge Construction
Authors: Yang Shi Ruo , Wang Jie Jun
Published: December 2012

The engineering ability is the most important and essential quality of an engineer as well as the weakness of higher education in engineering. Universities and colleges have to pay more attention to cultivate engineering ability to students. This article introduces CDIO model and produces the syllabus of Bridge Construction according to the CDIO concept. Through the teaching practice of Bridge Construction, the passage discusses the cultivation of engineering ability under the CDIO concept.
The Design of Integrated Intelligent Management System of Shield Construction in Mobile Computing Environment
Authors: Xiong Jing , Yu Gang
Published: December 2012

Shield Construction is an extremely complex system engineering which contains greater uncertainty and safety risk, therefore, it is essential to carry the intelligent management on the whole construction process. In order to meet the information needs of different levels of shield construction in the mobile environment, combined with the characteristics of the projects, this paper considered construction information as the core to research the Shield construction AJAX-based Intelligent Management System under the mobile environment. The system can provide technical support for the realization of the real-time sharing of information construction in the mobile environment and the construction of decision-making.
The Exploration of the External Teaching Base Construction of Civil Engineering in Excellent Engineer Cultivation
Authors: Yang Wei Jun , Jiang Peng Xiao , Liu Jiang Sheng , Yang Jian Yu
Published: December 2012

This paper analyzed the necessity of building the external teaching base of civil engineering in excellent engineer cultivation plans, proposed measures of the external teaching base construction from three links, including: the practice team link, construction enterprise link and project manager link. The analysis has positive significance to enhancing the education quality of civil engineering specialty production practice.
The Quality Analysis Research by Fuzzy Cluster Methods for High-Performance Concrete Mix Proportion Design
Authors: Zhang Yan , Wang Qi Cai , Tang Ke Chun , Huo Lin
Published: December 2012

High-Performance Concrete (HPC) is an important trend of concrete development, representing the concrete development of green technology and high performance. HPC is a multi-compound system, affected by many factors. It is difficult to determine good and bad of HPC quantitatively. At present, quality control of HPC mix proportion is largely based on experience and qualitative analysis, the lack of effective means to guide mix proportion design. The use of the mathematical theory of fuzzy cluster analysis in combination with the characteristics of HPC, we have established a HPC mix proportion design model by fuzzy cluster analysis. Arrives at the base with the similarity to the good HPC proportion, it achieves fuzzy clustering analysis method of quality control of HPC prediction.
Undergraduate Curriculum Design Based on Architects’ Core Abilities Cultivation
Authors: Chen Xiao Jun , Dai Xiao Ling , Yu Wen Bo
Published: December 2012

Architect’s knowledge covers both areas of human art and technology. The core abilities of this profession include analysis, design, presentation and coordination. Curriculum design in Architecture Department hereby shall attach great importance on the cultivation of students’ comprehensive competence. To foster talents with practical and innovative engineering ability, we set up three mutual supportive methods: module-based teaching system, open-typed and diversified educational platform, and well-structured faculty team. This method has been proved to be an effective one which achieved good results.
Consideration on Group Excavation Engineering
Authors: Guo Li Qun , Cheng Yu Guo
Published: December 2012

Group excavation engineering is a typical engineering roadblock in the process of urban underground space development . The concept of group excavation engineering was put forward and its features was described combined with practical engineerings. On the base of analysising the sections relevant group excavation engineering in Chinese codes, suggestions were given in the aspects of engineering investigation,design,construction and monitoring. At last,we point out that the theory is far behind the practice application in group excavation engineering.
Experimental Study on Engineering Geological Properties of Sandstone
Authors: Yang Hong Xia
Published: December 2012

Based on field survey sampling and indoor test of four big quarry rock in Wulumuqi, rock's engineering geological properties is system analyzed. Investigation and test results show that there is mainly sedimentary sandstone in the area, the composition of the substance is mainly debris, feldspar and quartz.Debris content of 60% or more, feldspar and quartz content of about 30%, cementing material is mainly made up of argillaceous and carbonate class whose ratio is about 10%. The compressive strength is higher in the natural state, the general in between 30 MPa-90MPa. In different moisture content state the compression strength are very different.Compared saturated state to dry state, the compressive strength reduced by about 40%. Tensile strength, flexural strength, shear strength and elastic modulus increase with increase of compressive strength. The same kind of rock in the same moisture content which tensile strength is only the 1/15-1/25 of the compressive strength, the flexural strength is the 1/4-1/7 of the compressive strength. Sandstone frost resistance is better, after 25 times the freeze-thaw cycle test, its strength is lower slightly and quality is not damaged.
Analysis of Three-Dimensional Effects for Deep Foundation Pit with FLAC3D
Authors: Zhang Lin , He Ming Xuan
Published: December 2012

Using FLAC3D Software for Analysis of Foundation Pit, the Stress that Caused by Sidewall Displacement of Foundation Pit Has Been Analyzed. the Influence Scope and its Rules of Foundation Pit Three-dimensional Effects Were Obtained.
The Effect Evaluation of Removing Outburst through Bedding and Layer-through Boreholes Combined Gas Drainage
Authors: Zhao Zhong Ming , Wang Lei , Wu Jian Bang
Published: December 2012

In order to test the validity of regional outburst prevention measures that combined the bedding boreholes and layer-through boreholes in 3104 coalface, according to the relevant provisions, used drilling index, pre-pumping index and gas index to evaluate the effect of removing outburst in 3104 coalface. The evaluation results shown that through the pre-pumping gas, the rate of pre-pumping gas was 53.7%, more than 30%; residual gas content was 2.85～5.07m3/t, less than 8m3/t; residual gas pressure was 0.01～0.02MPa, less than 0.74 MPa. Therefore, the coalface has eliminated the danger of outburst and created favorable conditions for safety mining.
The Bearing Capacity of Excavated Pile under Load Test and Finite Element Analysis
Authors: Hao Feng Shan , Guo Ying , Huang Yu
Published: December 2012

This paper is used to study on the analysis and prediction of surface subsidence caused by pipe roof reinforcement method construction. Take one of the Shenyang's sewage disposal projects to be investigated, it monitored on field surface subsidence in the construction of under drain. During the measurement and monitoring, except for conventional measurement of surface subsidence according to code and peripheral convergence and so on, in order to analysis changes of stress and strain of the pipe roof in the whole construction of under drain. It also respectively arranges JMZX-212 intelligent string type of strain gauge in both internal and external sides of vault and hence. It used the Element Birth/Death of finite element software basing on the field data, using elastic-plastic and nonlinear finite element method. Material constitutive relationship used moor-coulomb model, simulating the process of tunnel of excavation and support, researching and stimulating the surface subsidence. The surface settlement of value was calculated applying finite theory via the numerical simulation, it based on prototype of engineering, which was approximately in accord with the measured value in field. The correctness of soil constitutive model chosen and boundary conditions used is verified, meanwhile, the numerical simulation shows the validity of the method .the results provide reference to similar construction method in the future.
Energy Dissipation Analysis on Unloading Confining Pressure Failure Process of Rock Material
Authors: Chen Fu Jiang , Li Hong Xia , Zhu Ze Qi
Published: December 2012

The energy dissipation law of rock material are analyzed comprehensively by studying the energy exchange between test machine and rock sample in two typical stress-strain curve of unloading tests. The relationships between energy, deformation and confining pressure in unloading confining pressure failure process are expected to be found based on energy dissipation analysis. It shows that the energy dissipation is greatly related to the failure characteristic of rock material and confining pressure. Both two unloading tests show that energy dissipation has a nonlinear relationship with time and linear relationship with lateral deformation. The much the confining pressure is in unloading condition, the more the energy dissipation is under the same lateral deformation, and the obviously the rock sample suffers brittle failure.
Experimental Research on Shear Strength of Subgrade Soil and Plasticity Index under Different Freeze-Thaw Cycles
Authors: Wang Jing , Qu Xiao Long , Wu Chun Li , Xiang Yi Ming
Published: December 2012

Three different plasticity index subgrade soils are selected from seasonal frozen soil area. Triaxial compression test under different confining pressures are executed on the samples exposed to 0 to 7 times closed-system freeze-thaw cycles. The conclusion gotten is that to the same kind of soil under the same freeze-thaw cycles, the shear strength increases with confining pressure; Shear strength with the same confining pressure decreases with the number of freeze-thaw cycles; With the same confining pressure and the same freeze-thaw cycles, shear strength increases with the plasticity index. Exponential function is adopted for multiple nonlinear fitting on the test results. The relationship between shear strength and confining pressure, plasticity index, freeze-thaw cycles is obtained and shows a good correlation.