bluuebunny/crossref_metadata_2025 huggingface dataset:
Building Seismic Vulnerability Study for China High Rises
Authors: Wu Fan , Wang Ming , Yang Xin Yuan
Published: August 2013

High-rise buildings, as a result of rapid urbanization in China, become one of popular structure kind. However, there have been few seismic vulnerability studies on high-rise buildings, and few fragility curves have been developed for the buildings. Based on the published data of more than 50 high rises and super high rises, the structural information such as building heights, mode periods, locations and sites, the maximum design story drift ratios, are collected and analyzed. The vulnerability analysis for high rises uses response spectrum displacement as seismic ground motion input, since the structures have comparatively long natural period. Using statistics and regression analysis, the relationship between the maximum story drift ratio and response spectrum displacement is established. Based on height groups and earthquake design codes, the fragility curves of different performance levels can be developed. These curves can provide good loss estimation of high rise structural damage under earthquake ground motion.
Research of Comprehensive Measures of Cooling in Capital Construction Mine
Authors: Zhang Ming Guang
Published: August 2013

According to the less research on cooling technology and the present complex situation of the heat treatment in capital construction mine, the characteristics of heat damage manage of the capital construction mine are analyzed. The cooling measures are designed in capital construction mine. The comprehensive management measures combining the non-mechanical refrigeration and mechanical refrigeration way, must be adopted in the cooling in the capital construction mine. The non-mechanical refrigeration includes the ways to increase the air quantity, chooses the reasonable ventilation type, doubles lane, uses the double air duct for excavating ventilation, controls heat source and strengthens management, etc. Take the capital construction mine of Zhaolou Mine for example, the mechanical refrigeration is introduced. It turns out that the system operation is effective. The temperature in the heading face is conformance to the procedure requirements.
Geological Hazard Tendency Analysis of Room and Pillar Mining Method Based on Energy Index
Authors: Xu Su Chao , Jiang Q. , Jin C.Y.
Published: August 2013

Geological hazards especially for the dynamic disasters are proven to be the most difficult problems encountered in the deep underground projects. This paper attempts to deal with the geological problem faced by Shizhuyuan multi-ploy metallic mine base on the results of mechanics tests and numerical simulation. In order to understand the mechanism dynamic disasters, a new energy index, the Local Energy Release Rate (LERR), is put forward in the simulating process. By tracking the peak and valley values of elastic strain energy intensity before and after brittle failure, the LERR is set as an index to ascertain the scope of the high dangerous region. The results showed that LERR can satisfactorily predict the dangerous region, and it will be more accurate with some necessary monitoring method. The study indicates the potential of LERR for evaluating geological hazards in deep underground excavations.
Prediction of Hard Brittle Geological Disasters in Metal Mine from Microseismic Monitoring
Authors: Xu Su Chao , Chen B.R. , Jin C.Y.
Published: August 2013

During the past decades, the microseismic technique has changed from a simple researching means for rock failure study to a practical method for daily safety monitoring at high geo-hazard tendency mines. This paper introduces the microseismic monitoring system built at a metal mine aiming at the prediction of the geological hazard. The arrangement of microseismic monitoring sensors should take consideration not only of the current mining situation, but also by the aid of experts experiences. By a successful case of prediction for hard brittle failure, the Shizhuyuan microseismic monitoring system was proven to be valid and necessary in the prediction of geological hazard.
Experimental Analysis on Microstructure and Mineral Composition of Jurassic Soft Rock in Shajihai Mining Area of Xinjiang
Authors: Wang Xiao Lei , Yan Shun Xi , Wen Hai Qiao
Published: August 2013

In order to find out themicroscopic structure and determine mineral composition and relative content ofroadway soft rock in Shajihai mining area, this paper carried out experimentsof scanning electron microscope (SEM) analysis and X-ray diffraction analysis.SEM test results show that the microstructure of the surrounding rock isgenerally poor and joint, crack, pore are developed. The crack is easy toexpand under the effect of surrounding rock pressure and water, which makesrock mass more broken and greatly reduces the stability of surrounding rock.X-ray diffraction analysis test shows that the component content of clayminerals in the surrounding rock is high. Clay mineral in mudstone containsmontmorillonite and content of illite/smectite mixed layer is relativelyhigher, up to 45%. In conclusion, soft rock roadway of Shajihai mine areabelongs to the typical swelling-jointed compound soft rock. The targeted andreasonable compound transformation technology and coupling support measuresmust be adopted when supporting.
Analysis on Sensitivity of Permeability Coefficients of Factors in Non-Uniform Seepage Field
Authors: Zhu Shi Jiang , Yan Guo Xin
Published: August 2013

Permeability coefficient is the determining factor for physical quantities in the seepage field, which can affect the distribution of all physical quantities including seepage flow. It took a hydropower station tail race as an object, founded FEM numerical model, analyzed the influence of permeability coefficients of cut-off wall and bedrock in non-uniform seepage and got the key factors affecting seepage flow. It provides the references in theory for design and construction of the tailrace.
Contrastive Analysis between Shifosi Reservoir Impoundment Test and Numerical Simulation Results
Authors: Pan Jun , Leng Te , Liu Yang
Published: August 2013

Using numerical simulation method for project simulating prediction, the built mathematical models of actual conditions often need to be generalized, consequently, there are some inevitably deviations between model prediction results and the measured data, which requires the adjustment of model parameters to improve the model. This paper made a comparative analysis of Shifosi reservoir impoundment test observation water levels and model prediction water levels, adjust the model parameters and boundary conditions, then it would get the sensitive parameters that affect the accuracy and stability of numerical model and boundary condition and improve the fitting degree of measured data and simulation results.
Model Test Research on Soil-Landslide Surge by River Channel Reservoir
Authors: Chen Li , Wang Ping Yi , Yu Tao , Zhang Fan , Men Yong Qiang
Published: August 2013

By fully collected and surveyed on the soil landslide, with the help of generalized model, the experiment simulated the landslide occurrence and exchange process of soil landslide entered the water. Through the calculation and analysis of test results and influencing factors, it is given out the height of the initial surge, variation of the progressive surge and empirical formula of soil-landslide surge. Compared with experimental data, it is found that empirical formula has certain accuracy and it can provide a certain reference on surge disaster forecast.
Improvement of Absorbing Boundary Conditions for Non-Hydrostatic Wave-Flow Model SWASH
Authors: Zou Guo Liang , Zhang Qing He
Published: August 2013

The performance of absorbing boundary conditions in SWASH is examined. The method to determine the sponge layer region in each processor when calculating with multiple processors is improved. An exponential decay function is employed to the momentum equations in the sponge layer region. The numerical tests show that the proposed damping coefficients work efficiently on reducing the wave energy of reflective waves in the sponge layer.
Influence Analysis of Phy-Oceanography Processes for Distribution Characteristics of Dissolved Oxygen in Fujian and Zhejiang Waters
Authors: Zhang Hui , Liang Ying Yu , Zhang Bei , Du Pan Jun , Fei Yue Jun
Published: August 2013

Dissolved Oxygen (DO) of sea waters is an important index to ecologic environment of sea. Multidisciplinary surveys were carried out in four seasons from August 2006 to December 2007 in Fujian and Zhejiang waters. Contents of DO in winter and spring were higher than those in summer and autumn. Except for winter, contents of DO show a decreasing trend from surface water to bottom. The overall horizontal distribution of DO In the shore is higher than that of in offshore,but the detailed distribution is different in different seasons. The influence of Physical oceanography processes such as coastal current of Fujian and Zhejiang ,coastal upwelling and the intrusion of open-sea current, on Distribution Characteristics of Dissolved Oxygen was discussed by analyzing hydrologic and meteorologic data. The main conclusions are as follows:The contents of DO is negative correlated with Seawater temperature and salinity. The contents of DO in the shore is high which is impacted by the Yangtze diluted water and coastal current of Fujian and Zhejiang: There are three main reasons why the contents of DO are low in part sea waters of the studied area, which are the intrusion of Taiwan warm current and kuroshio water, the coastal upwelling and the stratification of water.
Reality Capture in Construction Engineering Applications Using Close-Range Photogrammetry
Authors: Dai Fei , Peng Wei Bing
Published: August 2013

In comparison with existing sensor technologies such as laser scanning and total station, the surveying technique of photogrammetry holds the advantages of being safe, inexpensive, efficient, and ease-to-use. This paper presents the research efforts of applying close-range photogrammetry to model 3D construction graphics, measure geometric dimensions of building products, and visualize changes and progress of dynamic construction sites. The research results demonstrate the potential of the investigated technique in solving construction jobsite problems.
Application of Double-Sided Heat Flow Meter in Testing of Overall Heat Transfer Coefficient of Building Envelope
Authors: Dong Hai Rong , Qi Shao Ming
Published: August 2013

It is essential to find out the thermal property of building envelope in order to design economical and reasonable scheme of energy-saving reconstruction. Field testing is a method of receiving the thermal property of envelope when existing buildings are reconstructed. In this paper, we focus on the need for obtaining the thermal transfer coefficient. A methoddouble-sided heat flow meter was introduced and used to test the thermal property of wall. The testing results show that it provides a feasible method for colleting basal data of energy-saving reconstruction of existing buildings.
Study on Planning Strategy of Urban Villages: With Lujiazhuang Urban Village as an Example
Authors: Zhao Jian Bin , Zhao Xin
Published: August 2013

With the accelerated pace of urban construction, urban area continues to expand and urban village problems are growing more heated. Scientific planning has a major significance to promote a healthy development of urban village transformation. This article describes the urban village problems exist in China from the following four aspects: the policy and management, handling in planning, environment planning, public and municipal service facilities. The writers studied the planning results of Lujiazhuang urban village in Xinfu District, Xinzhou City, and raised planning strategy of urban villages from three aspects: relationship with surrounding functional areas, environment planning of urban villages, improvement of public and municipal service facilities.
Study on Physical Characteristics and the Optimal Moisture Content Control Technology of Compacted Silt Subgrade
Authors: Wu Lei , Ju Qing Ling , Wang Hong De , Wu Jian Qing , Li Chao
Published: August 2013

Through field test, physical and mechanical properties, mechanical composition, characteristics and compaction properties of the Yellow River alluvial silt soil were analyzed. The result shows that silt inside air compaction was difficult to discharge due to the influence of soil particle composition and low content of clay. As a result, the uneven settlement deformation of subgrade is obvious and the stability of silty soil water is not enough. The rainfall is frequent. Moisture content of soil is too high. It is difficult to dry field soil. The construction period is short. In order to speed up the pace of construction, we proposed the over-wet silt optimal multiple water control technology.
Thermal Comfort Estimation on Indoor Space Using Computational Fluid Dynamics - A Case Study of Small Office Room
Authors: Chou Yu Tuan , Hsia Shao Yi
Published: August 2013

There is highly relevant between thermal comfort and air quality in indoor spaces. Temperature, wind speed, and other related conditions are crucial to workplace and living environment. The commercial software of Solidworks Flow Simulation is applied to conduct a three-dimensional office environment model in this paper. The numerical simulation according to flow field characteristic analyzes different air controlling in varied closed partition. Through the two convergence conditions, MRT and OT, get the air characteristics of the grid and to calculate the PMV and to predict the PPD using the software. Therefore, designers can acquire more adequate information of thermal comfort, wind speed and temperature in preliminary design stage via the efficient simulation process.
Test and Analysis on the Thermal Environment of Island Subway Platform in Frosty Area
Authors: Zhang Pei Hong , Yu Lei Xin , Wang Jian
Published: August 2013

in order to study the piston wind and its effect on the thermal environment and velocity field in island subway station platform with full-height non-enclosed screen doors, a number of field measurements were taken at the platform of century station of metro line 2 in Shenyang from Oct. 2012 to Mar. 2013. The test results show that the full-height non-enclosed screen doors enhances the heat transfer between the platform and the tunnel, the effect of piston wind increases the average temperature of platform by 0.7°C-1.4°C. Meanwhile, the full-height non-enclosed screen doors prevent the piston wind from entering into the platform effectively. The wind speed of the platform fluctuates between 0.25~0.52m/s when no train enters or leaves the platform, increasing slightly under the effect of the outdoor wind velocity. When one-way train goes into and out of the site, the maximum wind speed reaches up to 2.2m/s at the working area of platform. While, the wind speed of the stair section shows cyclical shocks between 1.2m/s ~ 1.7m/s with the amplitude attenuates gradually.The two-way train caused the the maximum wind speed up to 2m/s with the duration of 220s.
Optimization Research on Ventilation Modes of Anatomy Laboratory
Authors: Zhou Chuan Hui , Zeng Ya Ming
Published: August 2013

Good indoor air quality is the basic requirement of people's production and life, so it becomes more and more important and urgent to improve the air quality of the anatomy laboratory. According to the specific characteristics of the anatomy laboratory, the paper simulates the distribution of the velocity field, the formaldehyde concentration field and the air age of five ventilation modes by using the standard k-ε two equation model. The research will get a more effective ventilation model by comparing the simulation results. Then the simulation parameters will be adjusted based on the experimental results, it shows that the measured results are correspondent with the re-simulated results, and the error is also within the acceptable range. It is further to verify that the simulation method is feasible, and the conclusions obtained on this basis are acceptable.
Study on the Numerical Simulation of Surface Flow and Heat Transfer in Inclined Wave Fin-and-Tube Heat Exchanger
Authors: Zhai Jun , Qin Meng , Liu Feng Guo
Published: August 2013

With the CFD calculation software FLUENT, numerical simulation has been conducted to study the surface flow and heat transfer in inclined wave fin-and-tube heat exchanger, including uniform angle wave fin and inclined increase-angle wave fin. Velocity field, pressure field and the distribution of temperature field on the air side of fin surface were obtained. Heat transfer performance of the two kinds of fin were discussed and the curve of both heat exchange and pressure drop related to the inlet velocity were analyzed. The results indicates that in the same conditions, heat transfer effect is better than uniform angle wave fin. When the inlet velocity is 4 m/s ,the heat transfer of inclined increase-angle wave fin is about 1.1 times higher than that of uniform angle wave fin meanwhile the pressure resistance is as much as around 1.2 times, which provides a theoretical basis on heat transfer enhancement of wave finned tube.
Study on Lateral Earth Pressure of Anchored Retaining Wall
Authors: Li Ying Yong , Zheng Li Zhi , Zhang Hong Bo , Song Xiu Guang , Xue Zhi Chao
Published: August 2013

In order to ensure the security of gravity retaining wall in the high fill subgrade, the design of gravity retaining wall with anchors is proposed,the characteristic of the new wall is that comment anchors are added to the traditional gravity retaining wall,by friction anchors provide lateral pull to the wall so the stability of the new wall is improved. Because of the constraints of anchors, the lateral free deformation is influenced and the soil pressure distribution is very complicated, field tests showed that soil pressure distribution is nonlinear and pressure concentrate in anchoring position. In order to reveal the supporting mechanism of retaining wall and propose the soil pressure formula, the model test of anchor retaining wall is made and numerical simulation is done. The results show that soil pressure appears incresent above the anchor and decreasing below the anchor, the soil pressre also grew larger away from the anchor proximal in the horizontal direction.
Reliability-Based Structural Optimization Using Hybrid High Dimensional Model Representation
Authors: Zhao Wei Tao , Niu Cheng Kui , Jia Lei
Published: August 2013

A design method of reliability-based structural optimization has a powerful advantage because some random variables can be considered. However, the sensitivity analysis of reliability with respect to random variables is very complicated and its computational cost is very expensive. Thus, in this paper, based on hybrid high dimensional model representation (HDMR) and first order second moment (FOSM) method, a new method for the reliability-based structural optimization is proposed. A numerical example is presented to demonstrate the computational efficiency of the proposed method. It is shown that the proposed method can reduce the number of finite element calculation and has the high efficiency.
An Inverse Mode Problem for the Rod on Elastic Foundation
Authors: Tian Xia , Li Chuan Xiao
Published: August 2013

Consider the rod on elastic foundation. Its discrete model is the simply connected spring-mass system with partial mass connected to the ground. The inverse mode problem of constructing the physical elements of the system from two eigenpairs, the spring stiffness of the system is considered. The necessary and sufficient conditions for constructing a physical realizable system with positive mass and stiffness elements are established. If these conditions are satisfied, the rod on the elastic foundation may be constructed uniquely. The numerical methods and examples are given finally.
A New Solution to the Height of the Compressive Area of Reinforced Concrete Beams during Service Stage
Authors: Zheng Jiu Jian , Zong Li , Guo En
Published: August 2013

The compressive height of reinforced concrete flexural members in service stage is generally obtained by equations based on the concept, moment-of-area of conversion area with respect to the neutral axis in tension zones equaling to that in compression zones. In this paper a specific calculation method of compressive height for singly or doubly reinforced rectangular and T-shaped cross sections is proposed.
The Non-Planar Nonlinear Dynamic Model of the Inclined Cable with Lumped Masses
Authors: He Xue Jun , Zhang Shi Yun , Wei Kai
Published: August 2013

A nonlinear dynamic model for non-planar vibration of inclined cable with three lumped masses was developed by Hamilton principle, which considered the influence of the lumped masses, the external excitation and the inclination angle of the cable. The partial differential equations of this system were discretized to four degree of freedom ordinary differential equations by Galerkin method. The results show that there were complex model coupling between in-planar and out-planar model, first and second order model in this nonlinear dynamic system.
Empirical Likelihood Inference for a Partially Linear Model under Longitudinal Data
Authors: Jiang Yu Ying
Published: August 2013

In this paper, a partially linear model under longitudinal data is considered. In order to take into consideration the within-subject correlation structure of the repeated measurements, an empirical likelihood incorporating the correlation structure is developed. The asymptotic normality of the maximum empirical likelihood estimates of the regression coefficients is obtained. It also can be shown that the proposed empirical likelihood ratio is asymptotically standard chi-square. The results can be used directly to construct the asymptotic confidence regions of the regression coefficients. The convergence rate of the baseline function is derived.
Large Deflection of a Cantilever Nanobeam under a Vertical End Load
Authors: Chen Ming
Published: August 2013

Large deflection of a cantilever nanobeam subjected to a tip-concentrated load whose verticality to the deformed axis of the beam is assumed as constant. Governing equation is analyzed by using the shearing force formulation instead of the bending moment formulation because in the case of large deflection member, the shearing force formulation possesses some computational advantages over the bending moment formulation. The condition of boundary is discussed by several ways. The different sizes of loads and time scales are used to analyze the deformation and the different by molecular dynamics.
Multi-Wavelet Application Based on Engineering Building Deformation Monitoring
Authors: He Yong Hong , Jin Peng Wei
Published: August 2013

In order to separate effectively small deformation from GPS signal containing the error, Based on multiwavelet theory, the paper makes DGHM for GPS deformation monitoring signal processing, because the DGHM biorthogonal wavelet is with short support, orthogonality, symmetry ( antisymmetry ) and two approximation and other characteristics, in the same length of filtering, multi-wavelet method is more superior than traditional wavelet method, improves the signal to noise ratio, obtains higher accuracy, confirms correct and practical in the actual problem, the algorithm has opened a new way for deformation monitoring signal processing
3D GIS Model Building Based on SketchUp
Authors: Gao Yan Li , Hu Bai Lin , Jia Yong Hua
Published: August 2013

The main topic of this article is the architecture modeling data which is involved in 3D GIS. The constructing platform of modeling data is also discussed. Then, it makes comparison and analysis between these platforms. Comparing to other platforms, SketchUp has lots of advantages, such as easy to operate, good for effect, saving storage space and cross-platform. So it has been used for feature modeling in 3D-GIS area, and it can satisfy the demand of this domain. At last, combining with the practical engineering, the article discusses the modeling method using the SketchUp software. The results are desired, and the method is worth to extend.
Modal Analysis of Coal Preparation Plant Based on ANSYS
Authors: Nie Zhi Feng , Li Xing Long
Published: August 2013

Finite element model of the main building of Zhaoguan coal preparation plant was established and its modal analysis was carried out based on ANSYS. The front six orders natural frequencies and modal shapes were calculated and the vibration characteristics were carried out. Results of modal analysis showed that the front six orders natural frequencies of the main building are between 1.7252 Hz to 5.1332Hz, which are far less than the working frequency of vibrating screen 15 Hz, so that the resonance phenomenon would not exist in the main building of the coal preparation plant.
Construction Simulation and Construction Speed Analysis of Natural Draft Cooling Towers
Authors: Zhang Ming , Wang Heng Le
Published: August 2013

Using the finite element code ABAQUS and taking account of the wind load reduction, this paper presents a set of construction simulation methods of concrete cooling towers. A natural draft cooling tower at Taishan nuclear power station in Guangdong province, China, under three speeds of construction is simulated. Displacement and stress distributions of the cooling tower in the different construction stages are obtained. Some interested parts of the cooling tower are analyzed in detail and the variations of displacements and stresses of these parts with the construction are concluded. A comparative study of the influence of construction speed on displacements and stresses is performed as well. The analyses and proposals of this paper may be used as reference to the cooling tower design and construction.
Application of Double-Row Pile Optimization Design and Systematic Monitoring of Foundation Pit in the Main Stage Store of Jinan West Railway Station Great Theatre
Authors: Yu Feng , Fan Hu Chuan , Li Lian Xiang , Hu Guang Lei , Wang Yu
Published: August 2013

Combined with the foundation pit in the main stage store of Jinan West Railway Station Great Theatre, the design idea of double-row pile supporting structure is proposed. Through theoretic analysis and soil test ,after analyzing the major effect factors, optimization concept is deeply studied. By the implementation of systematic monitoring, while comparing the measured results with the optimized design scheme, some valuable conclusions are obtained.
Geometric Nonlinear Analysis of Low-Pylon Cable-Stayed Bridge Based on Finite Element Method
Authors: Li Xiang , Liu Yang , Zhang Ai Feng
Published: August 2013

Low-pylon cable-stayed bridge is a new style, which has developed rapidly in the 1980s. Changshan Bridge is the first cross-sea cable-stayed bridge in the cold area of China and is establishing in Dalian city of Liaoning province now. This paper takes this bridge as the background, analyzing the influence on structure of geometric nonlinearity. Cable sag and large displacement effect are considered in the analysis. And then, applying large common software-ANSYS to create finite element model to carry on the static calculation which are under the dead weight and secondary dead load, especially emphasize structure large displacement effect. At last, the linear and nonlinear analysis is made. Conclusions are obtained according to the comparison between those results. Study the feasibility of using ANSYS to realize geometric nonlinear analysis on structure.
Study on Project Design Process of Aircraft
Authors: Shang Yong Feng
Published: August 2013

The integration of the aircraft design process requires careful management of the computer information system to avoid the use of different standards yet to allow changes to be incorporated as the design develops. The aircraft project manager has to control the total system design. This requires different knowledge and skills to that of the traditional chief designer. Several different software suites have been developed to meet the requirements of 'computer-aided design'. Each of the major manufacturing companies has incorporated a specific CAD system which it standardizes for use in all the sections of the company; and they require subcontractors to be able to use a similar system.
Research of the Anisotropys Effect on the Deformation and Consolidation Coefficient of the Soft Soil
Authors: Liu Hong Jun , Quan Guo Zhao
Published: August 2013

The natural soft soil foundations often need to be treated for their difficulty to meet the project requirements. Drainage consolidation method is mainly used in highway projects for large area soft soil foundation treatment, which makes soft ground seepage pathways more complicated. Because of the soft soil anisotropy, the permeability of the different directions of soft ground has certain difference. Based on this, using one-dimensional consolidation test, the effects of anisotropy on the deformation and consolidation coefficient of soft soil are researched through compressing the soft soil with increased pressure time for each stage of load at different depths along the direction perpendicular to deposition surface and direction parallel to deposition surface with the designing multi-level loads. The results show that the compressibility of the soft soil at Jiangmen Binjiang new district has obvious anisotropy, that is, the compression amount along the direction perpendicular to the deposition surface is significantly greater than the amount along the parallel direction. With the increasing consolidation pressure, the variation trend of consolidation coefficient obtained from the compression in the two directions is basically the same, the coefficients of three samples at the different depth along the direction perpendicular to the deposition surface is also greater than the parallel direction, and with the increase of sampling depth the differences of the consolidation coefficient will be more obvious. The research results provide reference for the future design of the soft soil foundation at the region.
Analysis of Engineering Application about Reinforced Earth Retaining Wall
Authors: Wen Shu Lian , La Hai Bin
Published: August 2013

Geogrids reinforced soil retaining walls are widely used in various fields, such as highway, railway, architectural engineering, hydraulic engineering and so on because of its remarkable economical benefits, constructing convenience, adaption to the foundation simplicity of foundation treatment good vibration resistance shapely configuration and environmental pollution-free etc. Combined with a real engineering, the applied effects of geogrids reinforced earth retaining was tested. Based on the field test results and finite element method numerical analysis, the engineering characteristics of blocking reinforced earth retaining wall that used lime soil as filled material in construction period and after completion were opened out. The distributing characteristics and rules of wall back lateral soil pressure, tensile bar pull were put forward. Thus, technical references were provided for the similar structures.
Analysis and Treatment of Landslide at the Tunnel Portal in Nanjing Road
Authors: Xiao Zhuan Wen , Huang Lei
Published: August 2013

The landslide at the tunnel portal in Nanjing Road is mainly determined by a weak intercalated layer between the completely weathered bedrock and the strongly weathered bedrock. The weak intercalated layer has low permeability and weak shear strength, and its interface dip outside of the slope. As the consequence, landslide is likely to happen again due to a rainstorm or other inducement. In order to prevent a second landslide, a comprehensive treatment scheme is presented, which implements anti-slide piles as the major treatment and several auxiliary treatments including filling and compacting the cracks, cutting-off and draining water, locally bolt-shotcrete support, and repairing the existing retaining wall and the lattic frame beams. After applying this scheme, the slope stability meets the design requirements.
Numerical Simulation of Unsaturated Evaporation and Drying Front Advancing in One-Dimensional Soil Columns
Authors: Hua Zhang , Kang Gao , Yi Xiong
Published: August 2013

A coupled model of heat-moisture flow with Penman-Wilson evaporation boundary condition is used for simulating evaporation processes in three 1D vertical columns with different dry densities. The simulation results show that unsaturated evaporation process has three stages, i.e. constant-rate stage, falling-rate stage and residual stage. The depth of drying front has a great influence on soil actual evaporation. The actual evaporation decreases as the drying front advancing downward. The total evaporation decreased with the increase of soil dry density. The velocity of drying front advancing in the soil of higher dry density is faster than that of lower dry density.
Vibration Attenuation Characters in Deep Holes under Road Traffic Load
Authors: Mei Zheng Jun
Published: August 2013

Through the field vibration measurement of 50m and 80m deep holes under road traffic load, the attenuation law of displacement in holes with depth under traffic and traffic-free conditions was discussed in the time and frequency domains. Some conclusions were drawn as follows: RMS attenuation factor was close to 0.2 and the displacement is obviously reduced at a depth of about 40m; the peak frequency decreased as the depth gradually increased. Compared with the attenuation law in elastic half-space Rayleigh wave, it was found that the horizontal displacement reduced more slowly than the elastic half-space Rayleigh wave and the attenuation factor was gradually close to the attenuation curve of the elastic half-space Rayleigh wave with the increase of the depth; the attenuation factor of the vertical displacement gradually reduced as the depth increased and reduced much faster than elastic half-space Rayleigh wave.
Construction Organization Optimization for Subgrade Engineering in Tropical Rainy Regions
Authors: Yang Bo , Zhang Rui , Luo Shu Ping , He Ping , Qiu Yu Feng
Published: August 2013

According to the highway subgrade engineering construction period serious delaying by rainy climate for a long time in the tropical rainy regions. The key process of the subgrade construction affected by climate is roadbed filling turning. Binding the law of rainy, Considered the continuous available period for filling turning as a random variable to analyze the correlation with its frequency, established the regression formula, the values of correlation coefficient is more than 0.95, shows that the continuous available period for filling turning presents good exponential relationship, A new statistical method of continuous available period for filling turning called selecting time construction concept was put forward. According the feasible probability of the continuous available period for filling turning, put forward a new grade division method for roadbed filling. Optimized the construction organization of the subgrade engineering by the statistical function of continuous available period for roadbed filling turning, and proved its reliability and achievability. Demonstration and reference were provided for the highway construction and local standardization in southern rainy regions.
Finite Element Analysis of Pier Top Horizontal Displacement Caused by Newly-Built Road under High-Speed Railway Bridge
Authors: Liu Xin Chuang , Wang Bing Long , Yang Long Cai , Jia Yu
Published: August 2013

In order to meet the requirements of high-speed train's safe operation, the horizontal displacement of high-speed railway bridge pier top must be strictly controlled. This paper relies on one road construction engineering beneath an existing high-speed railway bridge. We use 2D finite element software to analyze the magnitude and direction of pier top horizontal displacement caused by road load. We take it into account that the effect of the soil nature on pier top horizontal displacement. The analysis showed that the nature of soil around piles of high-speed railway bridge is closely related to the magnitude and direction of the pier top horizontal displacement. Authors believe that the horizontal displacement of pier top consists of two parts. One is pier top pure horizontal displacement dragged by horizontal displacement of the top of piles, the other is pier top rotation horizontal displacement driven by the rotation of pile cap. The analysis result can be used for the design of road with embankment structure beneath high-speed railway bridge.
Sensor Network Optimal Design of Microseismic Monitoring System at the Left Slope of Jinping I Hydropower Station
Authors: He Gang , Xu Nu Wen , Sha Chun , Tian Li
Published: August 2013

In order to real time monitor and analyze the rock fracturing due to continuous construction and consolidation at the left slope of Jinping I hydropower station, southwest of China, a microseismic monitoring system was conducted and an optimal design for the sensor arrays was investigated. The sensor array was designed on the basis of P method and Powell algorithm. The artificial fixed blasting tests were applied to adjust the positioning accuracy of the monitoring system. The results show that the location error of seismic source is less than 12 m in the scope of the sensor array, which demonstrates the monitoring system has high positioning g accuracy. The contour of source location shows that the location errors near the main tunnels at the left bank slope is below 6 m. Signals from 689 microseismic events with moment magnitude ranging from -2.1 to -0.2 were recorded during the first year monitoring period from June 15, 2009. The spatial distribution of microseismicity can identify and delineate the potential failure at the left bank slope, which provides some references for the future excavation and consolidation of the hydropower station.
Art of Light and Shadow Reflected in Architecture
Authors: Zhao Jie
Published: August 2013

Architecture is a kind of art and the substance of architecture lies in space. Based on the change of light and shadow the plane and elevation scheme of the school history Museum was designed in detail. When the space of building is no longer drawn conclusion with the traditional entity enclosing, light gives architectural space new vitality, and creates a variety of architectural space artistic conception. The different architectural mood which is brought about by the change of light and shadow is analyzed and compared. The result shows the art of light and shadow should be embodied constantly during the design. These can provide valuable references for initial architectural scheme design.
The Application of High Strength/Performance Concrete in Chinese Construction
Authors: Wu Fei Hai , Lv Yun Long , Shou Quan Yang
Published: August 2013

In this paper, the usage of high strength concrete are analyzed, based on this analysis, high strength concrete’s engineering problems existing in Chinese practical application are discussed. Reasonable structural design theory according to high strength concrete are put forward , this method is more suitable, especially, for statically indeterminate structural systems. In the end,our suggestions are given in an effort to improve the application of high strength/performance concrete in the construction of China.
Experimental Study of Porous Concrete Material Thermal Insulation Material Lightweight Polystyrene Particles
Authors: Wang Hong Zhen , Fu Dong Geng
Published: August 2013

In this paper, through the test to determine the polystyrene granule as aggregate, the cement foaming slurry as cementitious material, with various additives for the performance adjustment material, optimum matching of polystyrene particles made of lightweight aggregate cellular concrete heat preservation material ratio, was the influence of raw materials on the performance and the thermal insulation of building production technology product form and key.
Interpreting Chinese Traditional Folk Houses from the Angle of Chinese Traditional Culture
Authors: Wang Xiao Jing
Published: August 2013

Chinese culture has a long history and origins long, traditional folk houses has deep cultural connotation in the long course of historical development. In this paper, it analyzes the main cultural features of Chinese traditional folk houses from the angle of Chinese traditional culture. You can get a macroscopic and deep understanding of Chinese traditional folk houses through the interpretation.
Effects of Loading Percentage of Polyurethane in Lightweight Concrete
Authors: Mohd Sari Kamarul Aini , Mat Sohif , Haji Badri Khairiah , Mohd Zain Muhammad Fauzi
Published: August 2013

An experimental program was performed to obtain the density, compressive strength, and thermal conductivity of palm-based lightweight concrete. Palm-based polyurethane (PU) particles were used as lightweight aggregates in creating concrete systems. Concrete systems contain palm kernel oil-based polyol (PKO-p) reacted with 2,4-methylene diphenyl diisocyanate (MDI). In this study, polymer concrete was improved to achieve the optimum level of PU with the lowest possible density. The PU particles in the concrete mixture comprised of 1% to 5% w/w with density of less than 1800 kg/m3. The PU particles were 5 mm in size. The ratio of PKO-p to MDI was set at 1:1 and the loading of the concrete mixture was set at 3% w/w to produce lightweight concrete. The resulting concrete has excellent compressive strength (17.5 MPa) and thermal conductivity (0.24 W/mK). Results show that the PU particle dosage has the most significant effect on the physical and mechanical properties of concrete.
A Study on Modified Methylnaphthalene Sulfonate Formaldehyde Condensates: Synthesis, Structures and Asphalt Emulsification
Authors: Shen Kai Hua , Wang Yi Bo , Wang Yan Shai , Li Yang
Published: August 2013

The novel surfactants of sulfonated methylnaphthalene-formaldehyde condensates modified with poly (ethyleneglycol) monooctylphenyl ether (OP-10), 4-octylphenol or octadecylamine were synthesized as anionic emulsifier for the preparation of asphalt emulsions and cement mortar. The experimental results revealed that the modified methylnaphthalene sulfonate formaldehyde condensates (MSFC-OP10, MSFC-OCP and MSFC-OAM) containing a substantial amount of hydrophobic and lipophilic groups in the main chain would exhibit a superior effect both in dispersability and emulsifying property. When cement is mixed with the emulsified asphalt containing MSFC-OP10, MSFC-OCP or MSFC-OAM, the free as-synthesized condensates in the emulsified asphalt exhibited a fairly good dispersing performance and this emulsified asphalt appeared to be relatively stable as well. The presence of either MSFC-OP10, MSFC-OCP or MSFC-OAM in the asphalt emulsion would not only markedly improve its stability, delay its demulsification process, but also would upgrade and restrain both the settlement and stratification of the mixed mastics.
Research of Performance of Low Amount of Cement Manufactured-Sand Concrete
Authors: Yu Chun Hui , Li Gu Hua , Gao Jin Liang , Wei Qun , Xu Da Zhen
Published: August 2013

Compared with natural sand, manufactured-sand is of small porosity, poor grain shape and graded, which impacts mixes workability and the properties after hardening. In Concrete, playing the role of retaining moisture water is mainly powder, including cement, powder in the sand and fly ash etc. The amount of powder has a great influence on the properties of concrete, especially on its workability. This paper mainly discusses the influence of amount of cement, cementitious materials, fly ash, water-cement ratio and other factors on the workability, compressive strength and shrinkage of concrete. The experiments show that, in the case of the low amount of cement, workability of the manufactured-sand concrete mixture, compressive strength and shrinkage deformation of test block all meet the actual requirements.
Synthesis and Application of Organic-Inorganic Composite Flexible Architectural Coatings Emulsion
Authors: Wu Jia Hang , Liu Guo Jun , Zhang Gui Xia , Liu Su Hua , Gong Jia Lin , Wang Yan
Published: August 2013

In this study, the organic-inorganic composite elastic latex was prepared by using the polymerization process of pre-emulsification semi-continuous combined monomer dropping and investigated for the effect of the manner of the introduction of inorganic component and the amount of silica on the mechanical properties of the polymer film and water absorption. The results show that, when the sol is introduced with emulsion by the physical blending method and TEOS and A-151 are introduced together, the amount of them are respectively 1.5% and 9%, the organic-inorganic composite emulsion can be prepared. Meanwhile, if SiO2 is added by the way of TEOS and A-151, the best film properties of organic-inorganic acrylate flexible latex will be obtained .
Regulation of Fine Grained Concrete Efflorescence Process
Authors: Strokova Valeria V. , Zhernovskaya I.V. , Fomenko Yulia V. , Makarova Natalya V.
Published: August 2013

The presented research focuses on the investigation of the efflorescence process and its structure and morphology. It aims at the development rational methods to prevent the efflorescence risk, taking into account the specifics of fine grained concrete paving blocks.
Study on Foaming Agent Foam Ability and Stability for Foam Concrete
Authors: Dong Su Fen , Zhang Wei
Published: August 2013

Foam ability and stability of foaming agent are key factors for foam concrete properties. Through researching LAS, SDS and magnesite foaming agent commercially available, the results show that adding HPMC after can reduce LAS, SDS and magnesite foam bleeding quantity and subsidence distance and has little impact on foam expansion, magnesite foam ability and stability are inferior to LAS and SDS. LAS performance is the best, when the dilution ratio is 1:50 with 0.12% HPMC after, the foam expansion is 28.1 and bleeding is 14ml, subsidence distance is 5mm, the prepared foam concrete strength is 1.14MPa and dry density is 449kg/m3.
The Relationships of Void Rate and Pavement Performances of Open Grade Friction Course with Analysis of Engineering Materials
Authors: Yuan Da Wei , Zhang Yan Qing
Published: August 2013

With the rapid development of our country highway career, different pavement materials quickly appear. Open Grade Friction Course (OGFC) is a new-typed topping mixture, which has excellent permeation, anti-skidding performances. This article through the experiments of different porosity OGFC in highway using some of the effects of data, determine that the proper void rate of OGFC, Provides a theoretical basis for the use of OGFC road.
The Effect of Viscous Materials Making on Self-Compacting Concrete
Authors: Cheng Wei , Li Rui Feng , Li Gu Hua , Gu Hai Peng
Published: August 2013

Self-compacting concrete(SCC) is the current trend of new concrete.A variety of materials have been added in it on the purpose of changing the properties of SCC[1].In this paper,three viscous materials of limestone powder, silica fume and metakaolin have been added in SCC to change self-compactability and strength.
Surface Modification on Pre-Expanded Polystyrene Particles
Authors: Luo Fu Sheng
Published: August 2013

The article by using the coating apparatus of fluidized bed, the surface coating method of the spherical particles of pre-expanded polystyrene (EPS), processing of EPS surface modified; different volatile solvents, as well as an acrylic resin, epoxy, modified polyurethane coating material selection, the EPS particle surface coating processing experiments. The test results show that after the modified material after foaming and mold filling repression through modified EPS material has a lot of improvement in its inter-particle adhesion, impact resistance and strength, the process can be EPS material of high value-added processing to provide a new way.