bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Foundation Pit Excavation on Adjacent Railways and Strengthening Measures
Authors: Zheng Yun Wen , Gong Quan Mei , Zheng Yun Zhuang
Published: November 2013

The excavation of foundation pits near existing railway will cause innegligible deformation for the railway line. This paper first conducts numerical simulation for the impact of the excavation of foundation pit for a building close to existing railway lines on the deformation of the railway, and arrives at such conclusions: the excavation of foundation pits has a great impact on the railway lines. The amount of vertical deformation is beyond the requirements of relevant regulations. Accordingly, the foundation needs stabilizing treatment. After the reinforcement of high pressure jet-grouting pile, the maximum vertical deformation decreases obviously to meets the requirements. On this basis, the paper analyzes the reduction amount on different phases of the excavation to work out their respective reinforcement effect. After that, it compares the results with the real data collected during the construction to test the correctness of the model, finds out the major periods during which the vertical deformation occurs as well as the amount of deformation in each period, and points out the worst period for railway deformation during the excavation of foundation pit.
Study on Safety Risk Evaluation of High-Way Under-Passing Railroad
Authors: Xu Ke , Li Hui Min , Lu Sha Sha
Published: November 2013

It is inevitable to make the new-built highways under-pass the existing railroad by virtue of high-speed development of the transportation in China. Since the relevant surveys on the safety risk evaluation of this kind of the project are lacked at this current stage as well as the limited referential sample data, the survey is to research the factors of safety risk and the self-characteristics as well as to build up the safety risk evaluation model by means of support vector machine plus the analysis with the help of the project example. It turns out that the analyzed result by means of the model has the propinquity with the expected result, as means the model with the limited samples is characterized of improving the objective correctness of the evaluation result in order to supply a scientific method for the safety evaluation of this kind of projects.
The Application of SLP with Hungarian Method in the Spatial Layout Planning of Logistics Park-with Chengdu International Railway Container Logistics Park as an example
Authors: Qian Xiao Wei
Published: November 2013

Exploring into the limitation of the application of SLP in the spatial layout planning of Logistics Park, this paper proposes to build a new model with perfect interior and associated exterior under the guidance of SLP and Hungarian method. The comprehensive interrelation of the function areas can be got on the basis of using SLP. Hungarian method can add the analysis on the correlation of the function areas and peripheral transportation. Finally, this paper proves rationality and availability of this method by taking the spatial layout of Chengdu international railway container logistics park for example.
Experimental Study on the Anti-Cracking Performance for Geosynthetics Overlay
Authors: Sun Ya Zhen , Wang Li Bao , Yu Bao Yang
Published: November 2013

In order to study anti-cracking performance for geosynthetics, the splitting and fatigue test of bituminous mixtures with geosynthetics and without geosythetics are carried out. The mechanical performance for tensile strength and elastic modulus of asphalt mixture are obtained through two tests. The tensile strength and elastic modulus of bituminous mixture are increased by 14.9% and 54.9% respectively. Through adding the geosynthetics overlay to achieve the purpose of retarding the development of cracks in the pavement.
Study of the Properties of Concrete Containing Waste Foundry Sand as Part of the Aggregate
Authors: Mambeli Barros Regina , Batista Pinto Fernando , Carvalho de Brito Rômulo , Silva Gilbert , Tiago Filho Geraldo Lúcio , das Graças Braga da Silva Fernando
Published: November 2013

The foundry industry has greatly increased in many parts of the world, and their generation of enormous amounts of waste foundry sand is a major environmental concern. Such waste may be classified as hazardous, requiring special precautions for its management, which may include disposal in landfills for hazardous waste. However, this waste can be used as a partial substitute for the sand in a concrete aggregate. Slump flow, water absorption, concrete compression strength, and index void tests were performed to study the properties of fresh and hardened concrete made by substituting 10% and 20% of the sand by weight with foundry sand as concrete aggregate. Image analysis by optical microscopy was also performed in the present study. The results showed that the replacement of the waste foundry sand is technically feasible under the conditions studied and that both the substitutions studied increase the compression strength of the concrete.
The Favorable Geological Conditions for Air Foam Drilling
Authors: Chen Wan Jiang
Published: November 2013

Air foam drilling is adopted generally for its high rate of penetration, lower pollution to the reservoirs and low costs. Only when there are low formation pressure, long interval favorable formation, clear non-gas or non-oil formation and lower pay zone, air foam drilling can realize its advantages including maximum increasing rate of penetration, protecting reservoir and lowing the cost.
Study on Vibration Displacement of Ground Building Caused by Construction of Shallowly Bored Tunnel with Drill and Blast Method
Authors: Zhou Xiao Jun , Sheng Qi , Guo Rui
Published: November 2013

A mathematical formula to calculate relative horizontal displacement of ground building due to blast vibration of surrounding rock for bored tunnel by drill and blast method is propounded on the basis of differential equation for dynamic vibration, and the mathematical expression is deduced by means of Laplace transforms. The main factors which influence the horizontal displacement of ground building subject to rock blasting are also discussed in the paper.
Study of Construction Method on Sole-Hole Double Deck Tunnel
Authors: Niu Ze Lin , Wu Huan Tong , Qi Yan Bo , Zhang Song Tao , Dai Ya Lei
Published: November 2013

2D elasto-plastic finite element method was adopted to analyze the forced state of the surrounding rock and the tunnel lining in every step of the construction project for Fulongping double-decked tunnel. In the analysis,Mohr-Coulombs yield criterion was employed incoporating associated flow law to account for the elasto-plastic characteristics of materials. The tangent stiffness method was adopted to solve the equation of equilibrium, and the stresses which exceeded yielded point were adjusted.
Size Effect on the Stability of Tunnel Excavation
Authors: Ju Xiao Dong , Yang Chao Shuai , Zhang Yu Jun
Published: November 2013

Size effect of tunnel excavation in fractured rock mass was analyzed with UDEC in this paper. For simplicity, two series of orthogonal equidistant joints were conceived in the calculation area. Change the excavation size and keep the constitutive model and its parameters of the rock mass around the tunnel to be constant during the solution. The result show, with the increasing of excavation size, vertical displacement of tunnel roof become larger, and the excavation stability turn weaker. So excavation size has great effect on the stability of fractured tunnel. In addition, another key factor, the joint set dip angle, whose effect to the tunnel stability was unearthed by comparing the results of horizontal and 45°joints. The larger the dip angle the weaker the stability at the same tunnel size.
Research on the Interaction Relation of the Causations of Tunnel Collapse Accident
Authors: Xie Hong Tao
Published: November 2013

The purpose of this study is to find the key factors influencing the tunnel collapse accident, and explore the causal relationships between the causations of the tunnel collapse accident. Based on document surveys and Delphi Method, a system of the causation indicators of the collapse accident is established. In order to make sure that the hierarchy structure of the causation index system of the tunnel collapse accident is illustrative and reasonable, a new method of system structure analysis is proposed based on the integration of Decision making trial and evaluation laboratory (DEMATEL) and Interpretive structure model (ISM). Applying this method, the center degree and the reasoning degree of the causation are obtained firstly, and then the system hierarchy structure of the causation index system of the tunnel collapse accident is actualized. The results showed that the main causes of the tunnel collapse accident are derived from management. This research reveals the interaction relations of the causations of tunnel collapse accident, based on which this research also provides strong theory and methods to support dynamic decision and quantitative risk assessment in tunnel construction.
Study on Vibration Laws of Ground Particles Cause by Shallow Tunnel Blasting Construction
Authors: Wang Jun Tao , Yang Qing , Wang Hai Liang
Published: November 2013

In order to study ground vibration laws of shallow tunnel blasting construction, so in this paper, we put Third Bid of Qingdao Metro Line 3 as the engineering background, selecting the monitoring segment blasting vibration monitoring, studying blasting vibration peak velocity. Basing on the measured data, analyzing the variation regularity resultant velocity vector peak velocity along the tunnel axis direction. The study found that resultant velocity vector peak did not occur just above the tunnel workface, but away from the working face in 1m ~ 1.5m the range. resultant velocity vector peak located in front of the workface is 1.02 to 1.45 times of resultant velocity vector peak located behind of the workface. resultant velocity vector peak located in front of the workface is 2.26 to 2.5 times of resultant velocity vector peak above the workface. resultant velocity vector peak behind the workface is 2.3 to 3 times of resultant velocity vector peak above the workface.
Research on Collapse Mechanism of Tunnel Portal Shallow Burying Segment of Center Diaphragm Construction Method and its Treatment
Authors: Zhou Fei , Xie Yong Li
Published: November 2013

The surrounding rock of Bijia mountain tunnel portal shallow burying segment mostly fractured, the level of these rock are V and VI. Serious collapse accident was happened during the tunnel excavating. Besides, the reason and mechanism of collapse is discussed by analyzing site monitoring displacementtime curves, surrounding rocks, construction method and inclement weather. After the collapse body stability, combined with the actual situation to choose reasonable management plan, after the governance, through analysis the field monitoring curves to inspect the feasibility of the scheme. From the result of operation, the treatment plan had been done well, the construction of tunnel was safety and stability.
Study on Safety Collaborative Management of a Metro Engineering Construction Based on Partnership
Authors: Cao Jing , Wu Xian Guo , Zhang Li Mao
Published: November 2013

The complexity of metro construction in the aspect of safety is prominent in nowadays, are need to introduce a new effective management methods in urgent. Safety collaborative management of metro construction, based on partnership, will introduce the collaborative organization to the safety management work, and provide the reference for the metro project. This study, which is based on Shenzhen metro line No.3 cover property in the needs of security coordination, analyzed the characteristics of safety coordination management in metro construction, put forward the realization form and organization model of safety coordination management in metro construction, constructed the security assurance model on the basis of partnership, developed metro safety collaborative management platform which on the strength of project information portal (PIP), then effectively implement combined the near outer layer and outer layer of metro construction safety management, enhanced information sharing, cleared working process, improved the efficiency of collaborative group work.
Study on Microfine Cement Grouting Material for Silty Fine Sand Stratum
Authors: Xia Chun Lei , Ye Ying , Wang Guan Ming , Cui Li
Published: November 2013

Silty fine sand is the second smallest sand with a particle diameter ranging from 0.0625 to 0.120 mm.This kind of sand exists in a large amount in Beijing subway excavation project. Due to the poor self-stabilization of this stratum,seeping , sand flow and collapse take place frequently. Grouting materials such as Portland cement and soluble glass (also called sodium silicate) are employed in most of excavation projects to reinforce this sand stratum. However, the reinforcement is not effective, leading to a large amount of accidents in the process of construction. The reason may be attributed to the fact that Portland cement is unable to penetrate into the stratum and the strength of soluble glass (0.6MPa) is too weak to resist the stratum pressure. To solve this problem, a modified microfine cement grouting material able to penetrate into silty fine sand stratum is developed in this paper. A combination of suspension and diluent is used to increase the penetration extension of the grouts,and the experimental results reveal that the addition of the mixture of suspension and diluent in microfine cement grouting materials improves the penetration property substantially.
Modal Analysis and Seismic Response Evaluation on Structures of Advanced PWR
Authors: Zhou Guo Liang , Tang Hui
Published: November 2013

To evaluate the earthquake resistant behavior of the nuclear island buildings of new generation PWR, in this study we formed the three dimensional finite element model of nuclear island structures ,which incluse shield building, the auxiliary building, the containment vessel, and the containment internal structures. Modal analysis was performed to to reveal the structural dynamic characteristics.And with the auumption of hard bedrock support media ,the dynamic response nanalysis of the nuclear structures under earthquake was conducted,respectively with response spectrum method and time history method.It shows that the seimic response of the strucures conform with the design level.Under the input excitations of SSE(safe shutdown earthquake) level, the iner forces and deforamtions can be well controlled in linear elasticity.
Ground Motion Prediction Equation for Lanzhou Region from Small Earthquake Records
Authors: Tao Zheng Ru , Li Wen Qian , Tao Xia Xin
Published: November 2013

By small earthquake records from the Gansu broadband digital earthquake network, five regional source and crustal medium parameters, stress drop Δσ, quality factor parameters Q0 and η, geometrical spreading parameters R1 and R2, are inversed for the Lanzhou area. Envelops of Fourier spectra are adopted as the objective function, the values of those parameters are 34.625bars, 95.665, 0.360, 58.188km and 105.650km, respectively. These values are adopted to calculate Fourier amplitude spectra, and complex spectra are formed by combining with random phase spectra. Acceleration time histories can be simulated, and PGAs on different moment magnitude-distance pairs are obtained previously. Compared with several observed strong ground motion data, the result is lower in the case of Mw=5.0, passes through the data in the case of Mw=6.0 and higher than the record of Mw=7.0. It is adopted in regional seismic zonation. Compared with The Zonation Map of Earthquake Ground Motion Parameters in China (GB18306-2001), the result is close to the map when PGA is lower than 0.2g.
Characteristic Analysis of 3.11 Seismic Waves
Authors: Chen Guo Ping , Ning Xiang Liang , Guo Hong Feng , Zhou Han Yu
Published: November 2013

33 records of Japanese earthquake are extracted in this paper (referred to as 3.11 seismic waves in the article).Then, through studying the basic characteristics, spectrum characteristics and anisotropic of 3.11 seismic waves, as well as the similarities and differences of the response spectrum of 3.11 seismic waves contrasting with the response spectrum of the code. The results show that: a) 3.11 seismic waves have rich spectral components almost near the predominant frequency and its energy mainly concentrate in 0.1~10Hz.b) By analyzing the spectrum distribution of the seismic waves, its destruction strength on different structures can be evaluated. c) Damaging strength of horizontal seismic waves is much larger than the vertical seismic waves. Serious damage to the structure can be caused by the horizontal seismic waves’ excellence spectrum components focusing on the frequency of the structure in the engineering. Vertical seismic waves have greater damage to the structures’ periods between 0.02s to 1s, but much smaller to other structures. d) it can effectively assess the damaging strength on the structure,in time history analysis ,when make 3.11 seismic waves as the input earthquake waves.
The Improved Elastic Stiffness Method Based on Energy Dissipation System with Buckling Restrained Brace Design
Authors: Zhao Xi , Pan Wen , Song Jing Xu
Published: November 2013

This paper brings up the improved elastic stiffness method to the energy dissipation system with buckling restrained brace design in high-rise buildings and super high-rise buildings, Introducing amplification factor technology by improving the original elastic stiffness method can amplify seismic action regularly and the iteration was notably reduced by the seismic action which was calculated from the amplified coefficient so that solving the problem of relatively slow iterative speed. According to the demand of displacement limit value and the stiffness distribution in main structure, the demand of lateral stiffness in general structure can be directly worked out so that it can get the effective stiffness which should be added to the energy dissipation with buckling restrained brace. By the practical engineering example which height of frame-core tube is 144m, the design steps and user principles of the method are clearly illustrated. Meanwhile the application of response spectrum method on the basis of the elastic stiffness is expanded.
Reservoir Induced Seismicity Types in the Three Gorges Project
Authors: Zhang Li Fen , Li Jing Gang , Liao Wu Lin , Wang Qiu Liang
Published: November 2013

Reservoir Induced Seismicity(RIS) is a common phenomenon needed to be focused in the construction and operation of water conservancy project. The Three Gorges reservoir has a digital telemetry seismic network to monitor the earthquakes in this region. According to the correlation between water impoundment and earthquakes, the reservoir induced seismicity can be divided into rapid response and delayed response. The two types can be found in the Three Gorges area as well. In 2003, soon after the first stage of water impoundment, micro earthquake swarm occurred, which is so called rapid response type and water loading is the main factor. And delayed effect is the most observed phenomenon in RIS, in which pore diffusion controls the earthquakes. Double difference relocation results show that the earthquakes can be generally divided into three regions. And the earthquakes controlled by the active faults are called tectonic type RIS, while those related with karst, landslide, etc are nontectonic type. In region A, some earthquakes are related with the Gaoqiao active fault, and some have relationship with karst. The earthquakes in region B are controlled by some coalmines, landslide, and so on. And the earthquakes in region C belong to tectonic type RIS, which have certain relationship with the Xiannvshan fault and Jiuwanxi fault. Different RIS types have different mechanisms and controlling factors, furthermore have different earthquake trending.
Characteristics and Mechanics of Earthquake Damage of Brick-Wood Building
Authors: Wang Qiang , Lei Xiao Peng , Wang Ping
Published: November 2013

Brick-wood building is one kind of widespread rural houses in villages and town of China, which has potential hazards to people lives and properties during strong earthquake, so that it is necessary to investigate its earthquake damage behaviors. Based on a great many of earthquake damage examples from historical earthquakes, characteristics and mechanics of earthquake damage of brick-wood building were analyzed and summarized. Earthquake damage modes for brick-wood building are mostly horizontal shearing damage, which tends to occur at positions with weak strength in horizontal direction or weak connections between different structures such as walls between doors and windows, intersections between lengthwise and cross walls, bottom of gable, and connections of beam with sommer beams, et al. Brick-wood building generally has better anti-seismic behaviors in earthquake intensity of VII, while worse behaviors in earthquake intensities of VIII, IX and X. Even though, if reasonable anti-seismic techniques and reinforced measures are applied to brick-wood house, it will have better anti-seismic behaviors.
Preparation and Properties of Concrete Containing Iron Tailings/Manufactured Sand as Fine Aggregate
Authors: Zhang Guo Dong , Zhang Xiu Zhi , Zhou Zong Hui , Cheng Xin
Published: November 2013

High performance concrete was prepared by using iron tailings mixed with manufactured sand. Effects of the content of iron tailings on the performance of concrete were studied. The results show that the slump of concrete containing iron tailings is equal to concrete with river sand when the content of iron tailings is 60%. With the increase of the content of iron tailings, compressive strength of concrete shows a trend of decrease at same age; meanwhile drying shrinkage decreases and is less than the concrete prepared river sand. After 200 times of freeze-thaw cycle, mass loss of concrete with mixed sand is less than 5% and compressive strength loss is less than 25% which are close to concrete with river sand.
The Amplification of Ancient River with a Various Thickness Covering Layer on Plane Primary Waves
Authors: Wen Li Ping , Zuo Lan Li , Wu Guan Xiu
Published: November 2013

While using Fourier Bessel series expansion technique and the coordinate conversion of Graf's addition formula, an analytical solution for the scattering of non concentric arc layered alluvial ancient rivers subjected to plane primary waves was derived. Then the precision of numerical results were checked up and analyzed. Finally, by using the analytic solution, the surface displacement caused by a various thickness covering layer was analyzed under different dimensionless frequency and incident angle. The analysis results show that the crest value of ground displacement is mostly near the ancient river, outside of vertical displacement at vertical incidence which occurred far from the ancient river of incident distal. The various cover thickness have a significant influence on surface displacement. The crest value of ground displacement of non concentric valley is higher than the concentric one at higher frequency incidence in general.
Influence of Lateral Shift on Normal Moveout of SH-Wave
Authors: Wang An Ling , Liu Fu Ping
Published: November 2013

Using the lateral shift and shift time of reflection coefficient of SH seismic wave at the interface of strata, , we derived and given formulae of normal moveout of lateral shift, discussed the influence of lateral shift on normal moveout of SH-wave, and drawn the curves of normal moveout of lateral shift and the error of normal moveout caused by lateral shift with respect to the angle of incidence. The results show that for glancing wave or angle of incidence being near the critical angle, A large error can be caused by t lateral shift; The error correction of lateral shift should be done before seismic data processing.
The Lateral Shift of SV-Wave on the Free Surface of Stratum
Authors: Wang An Ling , Liu Fu Ping
Published: November 2013

Using the phase shift of reflection coefficient of SV seismic wave at the free surface of stratum, we derived the lateral shift of total reflected SV seismic wave, given formulae of it, and drawn the curves of lateral shift, The results show that reflected wave of VS-wave exists negative shift; for glancing wave or angle of incidence being near the critical angle, a large error can be caused, In other angle of incidence the lateral shift is the same order of magnitude as the wavelength.
Formation Factor Analysis and Stability Evaluation for Suoertou Landslide
Authors: Wu Yun , He Yong Qiang , Zhang Hui Qin
Published: November 2013

Landslide is a slope on the soil or rock, subject to erosion of river water, groundwater activity, earthquake and artificial slope and other factors, under the action of gravity, along a plane of weakness or weak zone, whole or scattered along the slope slide down the natural phenomenon. As one of the most familiar and serious danger geological hazard. Slope has caused huge life and property losses of our country and people. So it is necessary to analyze the stable state when facing serious landslide hazards, and giving a reasonable evaluation. Taking Zhouqu Suoertou landslide as an example in this paper, on the basis of investigation and study, general situation of Suoertou landslide is introduced, then the stable state is analyzed, calculated and evaluated, the conclusion is a depend basis for later treatment.
Analysis and Evaluation of Slope Stability under Earthquake and Rainstorm Action
Authors: Zou Zu Yin , Zeng Yu Sheng , Mo You
Published: November 2013

Collapse and landslide induced by"5.12" Wenchuan Earthquake generated a large number of loose solid material, which still remained on the mountain. Aftershocks and heavy rain conditions will induce secondary geological disasters, a direct threat to human life and property security and reconstruction results. Based on the landslide of Hanyuan Two Pretty mountain, this paper studied the basic characteristics of landslide before and after earthquake. The finite difference method is adopted to simulate landslide process, and the stress-strain law and failure trend is explored in three conditions including the natural, rainfall and seismic condition. After this, the method of strength reduction is used to analyze slope safety factor in different rainfall conditions. The analytical results are consistent with the macrogeological phenomena before and after earthquake. Research results can provide a reliable basis for the future study of the impact of earthquakes on the landslide and disaster prevention and mitigation.
Elastic-Plastic Analysis and Research of Large Profiled Structure under Rare Strong Earthquakes Based on FNA Method
Authors: Xie Na , Wang Gan , Zhao Jian Zhong , Zhao Zhi Ming , Zhou Hui Xin , Xie Jing Chen
Published: November 2013

In rare strong earthquakes, the steel structure may occur the nonlinear behavior and redistribution of internal forces. In order to understand the post-buckling behavior of steel structures and determine the weak areas of the structure, and then determine whether the structure under strong earthquakes meets the seismic design goal or not, this paper adopts the FNA method to analyze the response of large profiled steel structure under severe earthquakes. Finally, we draw some general conclusions which are valuable for designing the large profiled structure.
Visco-Elasticity of Asphalt Mixture under Broad Temperature and Frequency
Authors: Yang Peng , Cui Hong Zhi , Wang Wei Lun
Published: November 2013

In this study, the improved model of CAM with clear parameter was introduced. The visco-elasticity of asphalt mixture under broad temperature and frequency was studied and the properties of asphalt mixture at high asphalt and low temperature of was described by fitting the parameters of CAM model. The four equations of CAM model can be utilized in analysis of visco-elasticity of asphalt mixture and the physical meaning of the parameters in equations was very clear; Through nonlinear curve fitting , the CAM model was found to overcome the defect of deviation from the start and the end fitting; For one kind of asphalt mixture, the complex shear modulus and storage shear modulus was higher in same frequency at lower temperature, and the elasticity was in dominant position significantly; At middle temperature, the modulus of asphalt mixture became smaller; At high temperature, although the modulus was lower, the elasticity was higher. At middle-high temperature, the modulus of asphalt mixture remained smaller and the ratio of elasticity was minimum value, and asphalt mixture was recognized as typical visco-elastic body and was destroyed easily by the deformation disease.
Energy Dissipation Research of Frame and Isolation Structure under Rare Earthquake
Authors: Fu Zhang , Pan Wen , Zhang Qiang Qiang , Pan Lei
Published: November 2013

This paper base on analysis of upper structure by SATWE and the effect of Isolation structure under the different horizontal seismic decrease coefficient by ETABS, and using PERFORM-3D on the macro to consider the energy dissipation of all the structure. In this article, there are four different coefficient: 0.25, 0.3, 0.35 and 0.4.Since when seismic intensity is 8 and the coefficient is less than 0.3, you must think about vertical seismic action, so the point of the coefficient 0.3 is a turning in the intensity curve of all the structure. Final we draw a conclusion that with the coefficient decreasing the energy dissipation of the nonlinear is reduced.
Gurtin-Type Quasi-Variational Principle of Buried Pipelines Dynamics
Authors: Feng Shao Chu , Chen Xue Dong
Published: November 2013

Because earthquakes may cause severe damage to buried pipelines, it is important to study dynamic response of buried pipelines. For dynamic response problem of buried pipelines, variational method is the suitable method. In the paper, Gurtin-type quasi-variational principle of buried pipelines dynamics is established by convolutional variational integral method, which is theoretical foundation of finite element method for solving buried pipelines dynamics problems.
Seismic Response Characteristics of Subway Station Structure
Authors: Ni Hong , Li Ming Hui , Zuo Xi
Published: November 2013

The dynamic Davidenkov model is used to model dynamic characteristics of soils, and plastic-damage model is used to model dynamic characteristics of station structure concrete. So that, considering the influence of soil-station structure interaction for 2D finite element analysis, the dynamic interaction of soil-station structure is modeled. The damage characteristics and energy response of station structure under seismic motion is analyzed. The result shows that damping energy and hysteretic energy are monotone increasing under ground motion, and the seismic characteristic has significant effect on the energy response of subway station structure. Furthermore, concentration effect of hysteretic energy of subway station structure is measured by hysteretic energy density. It is found that the hysteretic energy is the most centralized in the column, so the dynamic response of the columns is the maximum. Furthermore, the nonlinear damage evolution law of station structure is analyzed. The law of local and global damage index is consistent essentially, and the damage index is increased by the effect of accumulative deformation.
Parameter Determination of Sphere Bearing about Bridge in High-Intensity Earthquake Area
Authors: Li Shi Heng , Xia Jun Yong , Kong Ling Jun , Leng Xin Yun
Published: November 2013

This paper, through introducing dynamic time-history analysis and the calculation by acceleration response spectrum theory as well as making a contrast between them, provides typical approaches and calculation examples of parameter determination in designing anti-seismic sphere bearing about bridge in high-intensity earthquake area. Quantitative analyses are made on the force of installing sphere bearing in high-intensity earthquake area. The deficiencies of employing sphere bearing in high-intensity earthquake area are introduced based on structural features as well as data and corresponding solutions are offered.
Preliminary Analysis Method of Reservoir Leakage Based on GIS
Authors: Xu Bo , Xie Mo Wen , Wang Li Wei
Published: November 2013

Due to the geological complexity of the wide reservoir area, reservoir leakage problem has been the subject of Research in Water Resources and Hydropower Engineering. In recent years, the development and application of GIS (Geographic Information System), remote sensing technology and three-dimensional (3D) technology, have provided a powerful tool in analysis of the reservoir leakage problem. Based on the 3D remote sensing image visualization system created with remote sensing technology, GIS, 3D technology, this paper studies the leakage problem of a reservoir. By analyzing the terrain data, we can find the might existing leaking channels combining, combining lithology, geological structure and hydrogeological conditions. Then calculate the leakage quantity to evaluate the reservoir leakage. With the characteristic of accuracy and timeliness, the system will play an important role in preliminary analysis of reservoir leakage problemas well as forecasting decision making.
Particle Size Distribution to the Final Effluent Quality - Based on Turbidity
Authors: Yin Meng Meng , Wang He Li , Yang Chao
Published: November 2013

This paper studies the particle size distribution (PSD) and final effluent quality in the activated sludge process. The PSD of final effluent and mixed liquor were determined, and it was found that the settlement in the process can remove particles between 100μm and 200μm easily, while difficult to remove the particles between 13.5μm to 65μm, which was in the supracolloidal (1-100μm) range and could cause problem at higher flows. The final effluent quality was measured by turbidity. The relationship of PSD-10 with turbidity, was analysed and the formed links were paired. Therefore, the PSD can be linked with final effluent quality and can be expected to use as an index to evaluate the final effluent quality future.
The Experimental Research of the Restricting Factors of Water Invasion of Yulou Reservoir in Jin 45 Block
Authors: Zhang Shi Min
Published: November 2013

Jin 45 block has entered the later period of cyclic steam, Transforming the development mode is imminent,there is a big technical risks in the development of cyclic steam of edge and bottom water of heavy oil when it turns to steam flooding development, it is needed to understand the characteristics of Edge-bottom water which invades in reservoir and master the restricting factors of invasion of the edge-bottom water,to avoid the risk of steam flooding development reasonably and effectively. The experiment uses the three layers of inhomogeneous Artificial core which has high permeability transition zone of simulative edge water on the edge. Analysis the factors of differential pressure, temperature and distance of the water and bottom water to the effect of Edge-bottom water encroachment sensitivity. The results show that: Among many factors of water encroachment sensitivity, the effect of differential pressure to the regularity of water invasion is most obvious, at the stage of Connection of water invasion, the differential pressure has a little effect on the Instantaneous water influx, After the channel of water encroachment has formed,Instantaneous water rate and differential pressure is index function relation, in the late of water invasion, the instantaneous water rate is stable. The result provides the basis for the heavy waterflooded area turn to steam flooding.
Wettability of Alumina Substrates with Micro-Morphology and Microstructure
Authors: Li Jing , Du Feng , Li Qiang , Xu Jin Kai , Yu Hua Dong
Published: November 2013

A non-smooth surface with convex domes was fabricated on a chemical polished 2024 aluminum alloy substrate using the method of pressing with a symmetrically distributed concave hole module. Anode oxidation technique was used to prepare alumina films on a non-smooth surface. The as-prepared surfaces possessing microscale morphology and multiscale structures without anything chemical modification exhibited excellent hydrophobicity, and had a maximum water contact angle of about 133o. The microscale morphology of the non-smooth alumina films were investigated by a stereo microscope and a laser scanning confocal microscopy. A scanning electron microscopy was used for surface corresponding microstructure of the non-smooth alumina films. The forming course of the alumina films with pores was analyzed. Such an alumina films that combine excellent hydrophobicity with other properties may have many potential applications.
Derivation of Monthly Operating Rules for Cascade Hydropower Stations Based on SVM
Authors: Zhou Ting , Ji Chang Ming , Zhao Bi Kui
Published: November 2013

In order to promote the efficiency of actual hydropower system operation under limited inflow forecast, an Implicit Stochastic Optimization method using Support Vector Machine (SVM) theory is proposed in this paper to derive long-term optimal operating rules. By applying the model to the Jinsha-Yangtze river system which is the largest hydropower base in China, fitting performance of operating rules is explained and evaluated. System simulation results are given and compared to deterministic optimal operation. Power output processes comparison shows that the average annual system power generation in two scenarios are 395TWh and 392TWh, and the overall operation processes are in well accordance with explicable inconsistency, which proves the efficiency of SVM in operating rules derivation for hydropower stations.
The Numerical Simulation of the Pressure Pulse Plugging Technology in Pressure Shocks Field
Authors: Wang Xiao Hu , Wang Chun Sheng , Du Qiu Ying , Pang Bo Xue , Tian Ming Lei
Published: November 2013

In the oil field development process, oil wells production capacity has been severely affected by clogged wells. There are many ways to relieve clogged wells, due to easy to operate, on the lifting of the blockage formation, the pressure pulse plugging technology has good prospects, but the current theory remains to be further studied, so the pressure pulse plugging process was simulated necessarily. The task to pressure pulses pulse tube plugging device as the research object, the establishment of its three-dimensional structure model to study the internal structure of the chamber, to analyze the impact of the flow field structure size rule. Establish its simplified model two-dimensional flow field, the compiler can achieve the state of motion of the sphere device UDF, application dynamic mesh of the pulse tube through Fluent unsteady flow was simulated. By convection field pressure, velocity and import-sectional physical monitoring equipment installation depth research and analysis, work flow, pressure relief device structure and the formation process of the pressure shocks field were investigated. Reveal the pulse tube working mechanism, and promote understanding of the pressure pulse plugging the nature of technology, optimize the structure of the pulse tube design basis and direction for the pressure pulse plugging technology and its theoretical foundation dynamics simulations.
Assessment of the Water Quality Status for the Jinshan Lake in Zhen Jiang
Authors: Chen Zhi Gang , Chen Jun Jing , Chen Han Xiang , Xie Qing Jie
Published: November 2013

The water quality of the Jinshan Lake in Zhen Jiang city were evaluated mainly on the basis of forty samples collected from four locations.The purposes of the study were to assess the levels of parameters associated with the demands of the functions of the water body and to compare them with Environmental Quality Standards for Surface Water. Water quality parameters included pH, Temperature, Biological Oxygen Demand (BOD5), Chemical Oxygen Demand (CODMn), permanganate index, Total Nitrogen (TN), Total Phosphorus (TP), and NH3-N were analyzed. These water quality parameters were surveyed in 2012 on a monthly basis.Most of them met the Class Ⅲ level of Environmental Quality Standards for Surface Water excepting the Total Nitrogen and Total Phosphorus.The results show that the phenomenon of eutrophication existed in the the Jinshan Lake in 2012.
Research of High Performance Concrete of C100
Authors: Wang Guo Jun
Published: November 2013

The effect on concrete strength of various kinds factor was systematically studied by orthogonal test. The amount of cementitious material, slag content, silicon content, water cement ratio, aggregate gradation and other factors was consider. By adjusting the parameters of the experiment, the C100 concrete was preparation successfully, which has high stregth and pumping perfomance. The interface structure of the C100 concrete was analyzed by scanning electron microscope (SEM) and found that C100 has a better interface structures. The concrete is a system and his strength depends on the strength of the suitability of various materials, which is a new point of view was put forward.
Study of Urban Flood Control Planning in Taiyuan
Authors: Yi Xiu Yong , Zhang Yang
Published: November 2013

Considering topography, climate, river system, and existing problems in Taiyuan, the urban flood control planning in Taiyuan boils down to the following points: determine the flood control standard according to the size of city; study the flood alleviating measures in the upstream area; provide adequate water and soil conservation measures in the mountainous areas reduce flash floods; divert flood from mountainous areas to the downstream area instead of to the urban; improve the river channels in the urban area; provide flood detention and retarding area in the downstream area; study non-engineering flood control measures.
Safety Analysis of Cross Section of Sea Embankment and Viaduct
Authors: Pei Guang Chao , Zhang Xiao Min , Li Jin Yang , Li Dong Feng
Published: November 2013

The construction sequence of cross section has a great influence on the construction security when the sea embankment is built across the viaduct and the construction period is close. In this paper, the two-dimensional finite element static analysis of consolidation is employed, and analyzes the effect of construction on the deformation and stress of sea embankment, bridge pier and the pile foundation. At the same time, the interaction principles of soft foundation and bridge are revealed. Put forward the suggested solution of sea embankment and viaduct construction sequence which can provide a reference for the coastal traffic and sea embankment construction.
Soil Erosion Prediction and Control of County River and Tributary in Lujiang
Authors: Zhang Ying , Cai Hai Yong
Published: November 2013

Analogy method is adopted to work out the prediction parameters, and empirical formula is used to calculate the possible amount of soil erosion. Then, the conclusion of soil erosion prediction is drawn, and the suggestions are proposed as follows. Take the river regulation zone as the key point to soil prevention and conservation monitoring work, especially in rainy season. Drainage and connecting work to the neighbor water system should be well arranged. Restore the project sites and revegetate the plant at the final period of construction.
The Follow-Up Assessment Ofeffect of Pilot Test of Steam Flooding in Jin 45 Block
Authors: Sun Jun Feng
Published: November 2013

The steam flooding pilot test in Jin 45 block has steam flooding 4 years since June 2008 turned the drive.But now,it still don't understand the production dynamic,the degree of use of the reservoir,the effect of development of this pilot and the situation of temperature field,pressure field and saturation distribution field .Now petrel and CMG software are applied for the tracking simulation,on the basis of optimization of injection-production parameters,put forward effective adjustment scheme for the forecast of steam flooding .The results show that:at present,test is in displacing stage,after two adjusted in 2010 and 2011,the daily fluid and daily oil increased,moisture content decreased .The using of the layer of I35 is obvious. The using of the1,2 small layers of I group is high,the 4 small layer is low,the using of plane is great different.The pilot test of steam flooding in Jin 45 block has achieved good development effect,it offers an important basis for determining to replace mining mode of the later stage of cyclic steam stimulation of reservoir.
Study on the Influence of Self-Weight Sedimentation of Hydraulic-Dredged Mud
Authors: Zhang Chao Jie , Liang Guo Qian , Chen Xiu Liang , Ding Rong Xiang , Chen Yi Xin
Published: November 2013

The indoor scale-down tests were done to study the law of dredged mud during self-weight sedimentation. The tests reveal that the configuration method of the dredged mud and the changes of sea salt concentration have great influence to self-weight sedimentation, the dredged mud which is used by the indoor scale-down tests should be configured by sea near the project, and the higher price of metal cations can accelerate self-weight sedimentation of dredged mud, and the appropriate amount of chemical additive can also accelerate self-weight sedimentation of dredged mud, and improve soil properties.
Water Quality Evaluation Based on Fuzzy Mathematics in Groundwater Resource Area of SuoLuoShu in Shan Dong Provence
Authors: Zhou Ya Hong , Hao Gang Li , Chen Kang , Li Jun Feng
Published: November 2013

Based on the theory of membership degree and comprehensive evaluation in the Fuzzy mathematics, 15 groundwater samples form SuoLuoShu water resource were collected and assessed. Through the analysis of water quality and the local pollution characteristics, chloride, sulfate, nitrate nitrogen, total dissolved solids, total hardness were selected to be the evaluation index system. And the value of the corresponding indexes of 5 grades in the national water quality standard was the comprehensive evaluation level in this study. On this basis, the membership degrees of the groundwater samples in the 5 grades were calculated and by using the maximum membership principle, the groundwater grade of each samples were determined. The results show that the groundwater quality in this area is better generally. 80% of the samples measure up the standard of grade III and the three samples beyond it were all caused by the nitrate nitrogen pollution which was brought by human activities.
Study on Urban Flood Control in Yibin Reach
Authors: Dai Juan , Mao Lan , Li Ling Yun
Published: November 2013

This paper makes a detailed analysis on the natural conditions, flood disasters and watercourse conditions and evolution in Yibin, and conducts an analytical study on the flood control in Yibin Reach based on the needs of social and economic development in Yibin City. Based on hydrologic and hydraulic calculations as well as the layout of the project, it puts forward the recommendations for urban flood control in Yibin Reach, which is of great importance to improve the regional ecological environment and promote the development of regional economy in Yibin, and can bring considerable social benefits and economic benefits.
Research on the Permeability of Concrete under the High Water Pressure
Authors: Zhao Bing Hua , Zhang Shi Ping
Published: November 2013

Seepage is important influence factors of degradation and instability to the water or under water concrete structure, it is also the difficult point in geotechnical engineering research.Through the concrete seepage experiment，combined with the Seep/W module of GeoStudio software，simulation of unsteady seepage of concrete，it was obtained that the seepage field under the action of a variable water head in 24 hr,And the results were compared with laboratory data，For further research on concrete permeability structure in practical engineering, foundation stability and durability.