bluuebunny/crossref_metadata_2025 huggingface dataset:
An Evaluation of Environmental Assessment Methods
Authors: Hubert Jonathan , B Jahromi Ali
Published: June 2012

After successive global environmental conferences in which national governments pledged to reduce carbon emissions, there is ever-increasing scrutiny on the construction industry. This is because the energy used in the production of building materials and subsequently required to power a completed building form a substantial part of the overall carbon emissions generated by society. The response from both public and private sector interests around the world has been to enhance the importance of environmental assessments – both of building methods and the finished product – almost in inverse proportion to the tolerance for energy waste. The standards required by individual states vary considerably: part of this is down to local climate and geographical considerations, but a major consideration is the incentives offered for meeting a given standard. These consist primarily of tax credits and quality certificates, and the right to promote a building as “green”, thus improving the reputation of its designers and sales potential for buyers. Some of the various Assessment organisations around the world have already franchised their standards to other countries (both government-sponsored and private enterprises) and continue to form partnerships with each other, usually in the same continent or hemisphere. The principal aim appears to be expanding the influence of that particular environmental standard. There is the real possibility of environmental assessment methods in certain countries becoming counter-productive: in the rush to standardize, actual improvements made possible by new technologies are rendered useless by political manoeuvring to make a particular standard “the one” to use.
The Clean Production Examination and Verification of a Liquid Milk Factory
Authors: Gao Lin Xia , Pi Ke Wu , Wan Duan Ji , Wang Mei
Published: June 2012

The goal of clean production a new environmental protection concept to all businesses is to save energy, reduce energy consumption, reduce consumption, and increase efficiency. The ultimate aim is to protect the environment and enhance its environmental and economic efficiency to achieve the win-win situation. A milk factory establishes the firm foundations to develop lastingly for enterprises by the cleaner production reform which is the surest way to achieve the environmental and economic efficiency.
Development Overview and Direction of Energy-Saving Technology on Plastic Injection Molding Machine
Authors: Feng Gang , Zhang Chao Ge
Published: June 2012

The main energy-saving method of injection molding machine is that variable-frequency technology, variable pump system, servo control technology or energy accumulator is used to improve the hydraulic system and the efficiency of effective energy used on a hydraulic-driven system. At present, a larger development has been achieved in the injection molding machine energy-saving technology, but there are still some shortcomings, in order to better promote the research and development of energy-saving technology of injection molding machines, the characteristics of various energy-saving means of plastic injection molding machines is summarized and on this basis that the development direction of energy-saving technology of injection molding machines is put forward.
Influence Factors on Highway High Slope Seismic Stability and Preventive Measures
Authors: Liu Li Ping
Published: June 2012

Highway high slope seismic stability is an urgent problem need to be solved, and the existing specifications can not meet the needs of engineering in design methods, construction measures and enforceability. Based on the earthquake failure mechanism of high slope, this paper analyzes the impact factors on highway high slope seismic stability, and puts forward earthquake preventive measures for high slope.
Analysis of Composite Grade on Highway of Continuous Long and Steep Grade
Authors: Xing En Hui , Wang Rui , Li Jun
Published: June 2012

The problem of composite grade are discussed on highway of long and steep grade, namely how to ascertain the values of grade, length of grade and the sequence of composite grade, when the whole section of grade is composed of some different grade. The rationality of grade length limit methods is argued certainly according to the percentage each grade. The diverse combined circumstance of gradient are contrast analyzed from the angles of dynamic quality and economical quality of vehicle operation, then the design methods of composite grades with best dynamic and economical quality of vehicle is put forward to ascertain the values of grade, length of grade and the sequence of composite grade. The best vertical combined project is put forward that the composite grade of larger and smaller is better than average grade, and it is better than the composite grade of smaller and larger also. The bigger proportion of length of smaller grade is, and the better composite grade is.
Research on Load Transfer Efficiency of GFRP Dowel in Jointed Plain Concrete Pavement
Authors: Li Luo Ke , Li Yun Liang , Tan Yi Qiu , Xue Zhong Jun
Published: June 2012

In a jointed plain concrete pavements, the dowel bar system are used to provide lateral load transfer across transverse joint. Corrosion of commonly used steel dowel in engineering practice reduces their service life and costs considerable maintenance and repair spending for concrete pavements. The objective of this study focus primarily on the performance of none eroded GFRP dowel on LTE( load transfer efficiency) with the help of a three-dimensional finite-element model. The amount of LTE can be obtained directly from comparing the maximum deflection of the concrete slab and the level tensile stress under the concrete slab. According to the finite element results, the larger-diameter GFRP dowel are found to perform the best in this study.
Research on Performance of Road Application of Converter Bituminous Steel-Slag Mixture of Jigang Group Co. Ltd
Authors: Lu Fa Liang , Li Jin
Published: June 2012

To detect the chemical composition and physic-mechanical properties of converter steel slag of Jigang Group Co., Ltd and evaluate its feasibility as aggregate of the bituminous mixture. Prepare three kinds of AC20 bituminous mixtures by all using the steel slag as aggregate, by partially using the steel slag as aggregate and by all using macadam as aggregate respectively, and analyze the physic-mechanical properties of such three kinds of bituminous mixtures. The test analysis results prove that the high-temperature stability, low-temperature crack resistance and fatigue property of the bituminous mixture with all steel slag as aggregate or partial steel slag as aggregate are superior to those of macadam mixture. Although its water stability is a little bad, it still can meet the specification requirements, and it is suggested to be used widely in the middle and lower surface layers of pavement structure layer.
Relative Distance Measure Model for the Fuzzy Synthetic Evaluation of Subgrade Stability in Seasonal Frozen Area
Authors: Liu Han Bing , Xiang Yi Ming , Wang Hui , Sun Yan Yi
Published: June 2012

Based on the fuzziness and uncertainty of the subgrade stability in seasonal frozen area, the relative distance measure model with evaluation indexes and weights in the form of interval numbers is presented for the fuzzy synthetic evaluation of the subgrade stability. Firstly, the relative distance measure of each single index between the evaluated subgrade stability and the grading standards is defined. Then, the fuzzy synthetic evaluation model, which considers the functionality and proportionality of evaluation indexes, is established to calculate the comprehensive relative distance measure by using the Monte Carlo simulation method and the sequential relation analysis. Finally, a new decision index of the comprehensive relative distance measure is defined considering the concept of structural reliability, and the stability grade of seasonal frost soil subgrade can be determined by the minimum decision index from the corresponding grading standards. A practical example is given to demonstrate the feasibility and practicability of the proposed model.
Goaf Treatment for Gold Mine under Expressway
Authors: Zhu Deng Yuan
Published: June 2012

Based on investigation and survey, the conformation and the distribution for underground goaf are gotten. The goaf can be completely filled by drilling holes and grouting with the mixture of sand and water, using masonry border to isolate and filtrate the filled space and unfilled space. The shaft fills with cement stabilized soil without settlement. The result shows that latent threats remove during expressway opening for 10 years and achieve expected technical feasibility, economy, and rationality.
Modulus Back Analysis of Pavement Structure Based on PSO
Authors: Li Xiao Long , Li Xiao Nan , Zhong Yan Hui , Wang Fu Ming
Published: June 2012

A method for modulus back analysis of pavement structure based on particle swarm optimization (PSO) is presented. The principle and implementation process of the method is detailed. Some theoretical and experimental data of pavement deflection are selected to test its performance. The contrastive analysis of the modulus inversion results of the proposed method and some representative pavement modulus back calculation softwares using the same deflection data is also performed. The results show that the presented method has relatively high identification accuracy and notably computational stability, which can effectively reduces the influence of initial tentative value on inversion results of pevement modulus.
Study on Vibration of Futian Underground Hub in Guangzhou-Shenzhen-Hong Kong High-Speed Rail
Authors: Yao Jie , Xiao Ming Qing , Huang Dun , Yang Guang Hua
Published: June 2012

A finite element model considering the high-speed train excitation loads, track structure, vibration reduction measures, station structure, characteristics of foundation soils was established to study the problem of vibration in the underground Futian hub of Guangzhou-Shenzhen- Hong Kong high-speed rail. The first 200 natural frequencies of the station are all within 40Hz, the vibration energy concentrates mainly in the second and third floors, in the form of bending vibration mode; the modes of local orbital plate mainly accounts for vertical vibration, and the lowest frequency is near 26Hz.The additional displacement and stress induced by vibration is not great in general, vibration energy of the structure is mainly concentrated in the band of 15~20Hz. When the train passes by at a speed of 200km/h, without damping rubber pads, the maximum vibration level at upper floors is 57.9 dB, while with damping pads under the orbits the vibration level decreases by 5~6dB,which is a significant effect.
The Equivalent Stress Contrast Analyse of Inverse Structure and General Structure Asphaltum Pavement
Authors: Gao Jian Hong
Published: June 2012

Based on the multi-layer elastic system theory , it was elicited that the top basic-layer rigidity was a main determinate factor for the surface-layer bottom maximal equivalent stress. And the more basic-layer rigidity, the less surface-layer bottom maximal equivalent stress, showing the more the partake action of basic-layer to the surface-layer bearing axis load. On the side, bearing the same axis load, the stress passed to groundwork from the inverse structure was most compared with the other structures. So the inverse structure has no predominance in the road structure design.
Research on Matching Ability between Trunk Road Network Structure and Urban Spatial Layout
Authors: Wu Yan , Deng Ya Juan , Gao Yun E , Liang Zhi Lin
Published: June 2012

The corresponding matching relation between the trunk road network distribution and urban layout system development is disclosed through analysis of the correlation between road network structure and urban distribution system development. The fractal theory is introduced for respective introduction to the calculation methods of urban system spatial structure fractal dimension and road network spatial structure fractal dimension, and based on which, the model and the evaluation standard for the matching degree between spatial structure fractal dimensions of the road network and urban network, are established. The researches show that the different calculation methods have their respective advantages and disadvantages and different evaluation results correspondingly, so the discussion from multiple angles and determination of the relatively appropriate fractal dimension matching degree and further evaluation according to the research emphasis become the best way to solve such kind of problems.
The Numerical Study of the Stability of Roadway Seeping in the Roof
Authors: Liu Feng Zhen , Qiao Wei Guo
Published: June 2012

Seepage in the roof is one of main reasons resulting softening rock and roadway deformation, in order to make sure about the influence of seepage on the roadway stability, we established corresponding models by using numerical simulation software, and analyzed the stress distribution, the deformation of surrounding rock, and the distribution range and shape of the plastic zone, the results show that water is one of the key factors to influence the stability of roadway, seepage makes the strength of surrounding rock sharply reduce, and the roof, two ribs and floor appear serious deformation.
Impacts of Gradation on the Property of Lime-Fly Ash Bound Macadam
Authors: Xue Wen , Han Xiang Ping , Xia Zhi Guo , Zheng Qi
Published: June 2012

This paper studied the lime-fly ash bound macadam mixed with different proportions of lime fly-ash and aggregates which is often used in construction projects, analyzed the impacts of the aggregate content to the unconfined compressive strength, modulus of compressive resilience property with various lime content and is showed that dense skeleton lime-fly ash bound macadam reached the desirable strength property and had good effect on pavement performance Therefore, it is concluded that lime-fly ash bound macadam with desirable property, replacing fine aggregates is achievable, Test results show that coarse aggregate of lime fly-ash stabilized aggregate can form skeleton structure and has the advantage of high strength and other better material properties which can meet the requirements pavement.
The Influence of Porous Asphalt Pavement Based on DEMATEL
Authors: Hung Ching Tsung , Chen Shih Huang , Wu Chia Chen
Published: June 2012

Taiwan position is in the subtropics, the climate is high temperature and much rains of year. Freeway mostly uses traditional dense grade in pavement construction, so the pavement could not remove water quickly in rainy day. It will deteriorate by rutting and aging, due to increasing maintenance frequency and cost. Porous asphalt pavement has high performance on road user safe and amenity in many countries. But the prescription in porous asphalt is Variable, for example, the fiber has miner and wood. Base on multiple conditions, the best performance can choice by multiple criteria decision method. This methodology needs the criteria under independent, but the real world is not. The study use Decision-Making Trial and Evaluation Laboratory method to establish the relationship in criteria. With result, the drainage capacity was the important factor in porous asphalt pavement.
Hamburg Wheel Tracking Test for Porous Asphalt Concrete
Authors: Jiang Wei , Xiao Jing Jing
Published: June 2012

According to the porous asphalt concrete’s big void structure as well as high temperature and rainy application environment, the author point out that using the conventional evaluation index such as high temperature stability and water stability to evaluate the PAC’s performance seem single, and then put up with estimating the PAC’s pavement performance by means of Hamburg Wheel Tracking under the water-high temperature’s comprehensive action. Studied on the PAC with the same raw materials and different gradations, and compared with the experimental results of AC-13 modified asphalt mixture and SMA-13, the results shows that, Hamburg Wheel Tracking test not only considered the water-high temperature’s comprehensive action on mixture, but also considered the mixture’s performance decay under long-term loading. Hamburg Wheel Tracking test can evaluate the PAC’s performance more practically, the PAC which materials and graduations reasonably designed have good performance, and its Hamburg Wheel Tracking final deformation is only 3.89mm, it can satisfy the demand from the high temperature and rainy environment. As well, the test results also comes to the conclusions that under the same materials and the same air voids, the PAC with coarse framework structure own better water stability and water-high temperature stability.
Analysis on Sewage Source Heat Pump Applications in the Building Energy Saving
Authors: Liu Xue Ting , Yang Dong , Lou Zai Qiang , Zhang Yun Ting
Published: June 2012

This paper briefly describes the sewage source heat pump, focuses primarily on water-source heat pump applications in practical project . Sewage source heat pump technology has matured and the rapid development of building energy saving in the promotion and application of energy efficient use of urban sewage system provides a reliable technology to ensure that, with the energy, economic and environmental advantages. Sewage source heat pump technology to urban wastewater recycling, turning waste into treasure,to achieve a sustainable energy development.
The Effect of Cement on Performance Properties of Foam Asphalt Cold Recycled Mixture
Authors: Du Shao Wen , Huang Deng Feng
Published: June 2012

Foamed asphalt can be used to stabilize reclaimed asphalt pavement materials at environment temperature. In this paper, the effect of cement on the performance properties of foam asphalt recycled mixture were evaluated by laboratory tests, including indirect tensile strength (ITS) test, moisture resistance test, rutting test and low temperature bending test. The test results find cement can improve the ITS, moisture resistance and rutting resistance of foam asphalt recycled mixture. However, the higher cement content can decrease the low temperature bending failure strain. Therefore, it is recommended the optimal cement content for foam asphalt recycled mixture is between 1.5% and 2.5%.
Highway Roadside and Median Green Belts Design Method Based on the Theory of Dynamic Vision
Authors: Jia Zhi Rong
Published: June 2012

Unity and change are the basic principles of highway landscape design. Based on the investigation of highway revegetation, new concept of revegetation design was given. Bad roadside landscape should be sheltered by green belts, and beautiful roadside landscape should be divulged or showed by locally eliminating the green belts, and maximum length of green belts with single pattern should be limited for preventing drivers from dozing. Based on the theory of dynamic vision, this paper presents the formulas for computing the stake numbers of setting or eliminating the green belts according to the requirements of landscape design, and the formulas for computing the maximum length of green belts with single pattern. The results are helpful to the highway roadside and median green belts design.
A Research into the District Strategy on the Transportation Junction Terminal of High-Speed Railway - An Analysis of the Urban Design of the High-Speed Railway District in City of Wenling
Authors: Chen Jian , Zhou Yan Li , Huang Yao Zhi
Published: June 2012

As the social economy and urbanization develop rapidly, a new high-speed railway city construction is undergoing. Urban designing theories that lack of research and practice leads to immature designs of high-speed railway stations. Based on urban design cases currently undertaken and theories and practices from home and abroad, this thesis analyzes the specialty of urban design of the high-speed railway stations. This thesis points out the significance to propose a scientific and reasonable strategy of developing areas and producing energy, and points out the significance of pattern of land-using on this sort of design. In terms of the specialty of the development and design of high-speed railway stations, this thesis offers some valuable insights into future research and practice.
Research on Relationship of Dynamic Calculation Parameters and Deformation
Authors: Yuan Jian Yi , Cheng Tao , Zhang Ding Bang , Wu Zhen Hua , Xiang Jian
Published: June 2012

In order to analyze the effect of dynamic calculation parameters to subgrade deformation, cross-section in the Shanghai-Nanjing high-speed railway is chosen and the numerical simulation calculation method is applied. Through numerical calculation of 121 kinds of conditions combining dynamic shear modulus and dynamic damping ratio, the dynamic elastic deformation of point A and dynamic partial stress of bottom layer of foundation bed were studied. It shows that the maximum dynamic elastic deformation of point A reduces with dynamic shear modulus and dynamic damping ratio increasing. Moreover, the value of average dynamic partial stress augments with dynamic shear modulus increasing, and reduces along with the increase of dynamic damping ratio. Using nonlinear fitting method of constructing three polynomial surface equations, the function of total deformation with dynamic calculation parameters is obtained.
Study on Load Stress of Lean Concrete Base in Asphalt Pavement
Authors: Suo Li Jun
Published: June 2012

Load stress, which is caused by traffic loading, is important parameter used in the analysis of the new pavement design. In order to study the load stress of lean concrete base in the asphalt pavement, first of all, three–dimension finite element model of the asphalt pavement is established. The main objectives of the paper are investigated. One is calculation for load stress of lean concrete base, and the other is analysis for relationship between load stress of lean concrete base and parameters, such as thickness, modulus. The results show that load stress of lean concrete base decreases, decreases and increases with increase of base’s thickness, surface’s thickness and ratio of base’s modulus to foundation’s modulus respectively. So far as the traffic axle loading is concerned, it has a significant impact on load stress of lean concrete base, and it can be seen from results that when load is taken from 100kN to 220kN, load stress increases quickly with the increase of the traffic axle loading.
Research on Determining Method for Asphalt Pavement Repair Area of Semi-Rigid Base Course
Authors: Wei Lian Yu , Wang Yan Fei , Ma Shi Bin
Published: June 2012

The semi - rigid base pavement disease characteristics, the use of finite element model of comparative analysis of different diseases at the deflection basin, obtained disease and the shape of the deflection basin, and thus can be used (FWD) measurement deflection basin to determine the size and depth of repair.
Evaluation of Asphalt Mixes Containing Reclaimed Asphalt Pavement
Authors: Arshad Hussain , Qiu Yan Jun
Published: June 2012

The use of Reclaimed Asphalt Pavement (RAP) has been enormously increased from the last two decades. In fact using RAP in pavement construction has now become common practice in many countries. Using RAP not only economical and environmental friendly but also preserve the natural resources and similar or even better in structural performance than virgin asphalt mixtures. This paper presents an experimental study to evaluate the effect of various types and percentages of RAP on the properties of asphalt mixtures. Four mixtures, which were the combination of two different virgin aggregates and two different RAP sources were studied in this research. The mixtures were designed by Marshall method at a wide range of 0 to 100% RAP blends. RAP material was blended with virgin aggregate such that all specimens tested had approximately the same gradation. Mixtures containing RAP showed significant variability and the variability increased with the increase in RAP content.
Research on Asphalt Pavement Rutting Deformation
Authors: Liang Wei , Gong Ben Hui , Zhang Zhen Bo
Published: June 2012

This article describes and analyses the rutting forming process, basic classification, and control standard of the rutting depth, and the results show that, Understanding of the fundamental characteristics of the rut and mastering of the rut control standards, is an important reference index which is used to design the asphalt pavement structure and materials
Renewable Energy Technologies for University Library Building
Authors: Liu Jian Li
Published: June 2012

The library is the information center and the major energy consumer in universities. Based on the trend of social development and the actual situation of universities, this thesis puts forward "solar"" heat" and" wind", the renewable energies suitable for university library construction and methods of their utilization, and meanwhile draws such conclusions as “giving full play to the role of Architects"," strengthening the professional cooperation" and" designing from the overall perspective".
Experimental Study on the Progressive Failure Zone of Non-Bolted Roadway with Infrared Radiation Detection
Authors: Zhang Yong Jun , An Li Qian , Mao Ling Tao , Wang Jin Tao
Published: June 2012

The thermal infrared (TIR) radiation in the deformation and progressive failure of coal roadway and the mechanism of thermo-mechanical coupling were investigated. The experimental achievements showed that the surface TIR temperature (TIRT) rose non-uniformly with the load increase before the stress peak and TIR radiation caused by stress concentration and fracture belt, was much stronger and higher than that caused by stress relaxation, week friction and tensile fracturing. The progressive failure zones were determined from the change ratios of TIR temperature of the different areas of the surrounding rocks. The infrared thermal image anomaly appeared with the macro-cracks development in the progressive failure of roadways, which reflected the spatial and temporal features of infrared precursor respectively. The infrared thermal image precursors were classified as TIRT increment region and TIRT constant region to disclosure the damage evolution and localization behaviors of roadways.
The Shaping Process Research on Crumb Rubber Modified Asphalt Mixture
Authors: Yu Miao , Wu Guo Xiong , Liu Wei , Wang Xiu Yun , Zhang Liang
Published: June 2012

The application of waste tire rubber in highway engineering mainly focuses on the modification of asphalt rather than the asphalt mixture, which restricts the application of waste tire. The addition of rubber has an effect on the performance of the mixture because of the obvious difference between rubber and mineral aggregates. This paper makes a research on the preparation technology of the specimens made of crumb rubber modified asphalt mixture in the laboratory by means of the study of selection of rubber、aggregate gradation、compaction temperature and so on. The effect of compaction was investigated in terms of the air void of the specimens under different preparation conditions. The optimal preparation process of rubberized asphalt mixture is put forward which could be proved to effectively control the pavement damages such as loose、stripping and so on.
Technique for Construction of the Cap Beam of the Door-Shape Piers of an Overpass Transversal to the Contact Wire of an Existing Railway
Authors: Xie Xin Min
Published: June 2012

In the construction of an overpass transversal to an existing electric railway, when the overpass pier is door-shaped, and, when the clearance height from the bottom of the door-shaped pier cap beam to the contact wire electrified body is too small to use steel beam or I-beam for holding the formwork and meet the safety need prescribed by the Ministry of Railways, an innovative construction method was employed, in which D-type steel beams, originally used for railway track reinforcement, was lifted to get across the contact wire and the catenary from above with a gap more than 33.8cm, resting on the top surface of temporary buttress, and letting stocky horizontal beams hold the formwork of cap beam, so as not to affect the normal operation of the existing electric railway. This innovative technique has been granted patent for invention by the State Intellectual Property Office.
Analysis on the Site Location and Impact Factors of the High-Speed Rail Station - As a Case of the Beijing-Shanghai High-Speed Rail Stations
Authors: Yin Hong Ling , Cui Dong Xu , Li Song Kai
Published: June 2012

The site location has the crucial influence on the success of high-speed railway station area. Based on the site location type of high-speed railway station, this article analyzes the characteristics different types as a case of the Beijing-Shanghai high-speed rail stations. At last it puts forwards that the accessibility, demands for land and urban coordination are the main factors affecting the station location from both internal and external factors of the site location of high-speed railway station.
Studies on a Prefabricated Solar Collector Panels
Authors: Wang Qi , Li Song , Yu Miao , Meng Jiao , Cao Wen Long
Published: June 2012

The paper focuses on a new type of solar collector used double plastic-steel windows and covered of double common glasses. To ensure air passage closed and insulation, the collector is prefabricated made in whole. The inside and backplane of collector are covered of heated enamel in dark green with copper oxide, magnesium oxide and iron oxide; The penetrated metal mesh is placed in air passage between absorber and glasses to enhance heat transfer. The size and position of gas inlet and outlet of collector could be specified by means of simulation and analysis. Heat loss coefficients and thermal efficiency are tested. The results show that thermal efficiency of collector is superior and performance of heat preservation is good. The application of collector in solar buildings can replace the Trombe wall and be used as a type of outdoor, easy to regulate their construction process and ensure the effect of solar collector.
Analysis of Effect of CFG Pile Composite Foundation Pile Spacing on Embankment Stability Based on Centrifugal Model Tests
Authors: Zhang Jin Song , Guo Chao , Xiao Shi Wei
Published: June 2012

The cement-fly ash-gravel (CFG)pile composite foundation played an important role in increasing the soft soil foundation strength and stability, and decreasing the foundation settlement etc, because that the pile strength potentiality could be fully developed and soils bearing capacity also could be fully utilized. The analysis of interaction rules among flexible embankment, CFG pile, soils, and cushion was the key factor to keep the CFG pile composite foundation stability. Three centrifugal model tests with different CFG pile spacing were conducted to research the effect of pile spacing on the CFG pile composite foundation stability, and the surrounding soils press, pile top press, pile strain etc were measured. It was shown that the embankment instability modes were different with CFG pile spacing. CFG pile composite foundation stability was affected by pile spacing, pile quality, and embankment height etc. Instability of CFG pile composite foundation was complicated, but not only for pile or soil destroyed.
Research on Longitudinal Slope of Highway Based on Control by Flow Path Length
Authors: Zhang Zhuo , Gao Jian Ping
Published: June 2012

Flow path on the highway is longer, driving exits the more dangerous. Based on the mechanical theory, the calculation models of the flow path length in different sections were built by FDM and multiple linear regression method. The flow path length of different section and different longitudinal slope was studied. The results show that: in addition to straight line and circle curve, when the number of lane is more than 4 and longitudinal slope is greater than 4%, the flow path length at other sections almost exceeded the prescribed value. Made the flow path length as control index, the amendment value on the maximum longitudinal slope of highway is proposed.
Study on Implementation Method of Left-Turning Traffic Forbiddance Measure on Urban Road
Authors: Lu Jian , Wang Yun Xia , Dai Lei Lei , Gu Jin Gang
Published: June 2012

The left-turning traffic forbiddance measure is an important mode of traffic organization of intersection, but the traffic management departments are puzzled by the implementation condition, implementation method and efficiency evaluation. The traffic impact analysis of left-turning traffic flows and the advantages of left-turning traffic forbiddance measure is analyzed in paper, then the implementation flows is summarized. The implementation condition and method are determined, and the average delay of intersections in the whole region are chosen as the evaluation index of operation efficiency of the left-turning traffic forbiddance measure. So the calculation method of efficiency between pre and post adopted the left-turning traffic forbiddance measure is proposed. The intersections of business district in City Hengyang is chosen as example for verifying the implementation method of left-turning traffic forbiddance, and the efficiency between pre and post adopted the left-turning traffic forbiddance measure is comparatively analyzed and the VISSIM simulation software is applied for verifying the effect of the left-turning traffic forbiddance measure.
Applications and Planning Theories of the Rail Transportation System in Airport Based on Air-Rail Intermodalism
Authors: Ouyang Jie
Published: June 2012

This paper studies the planning theory of airport rail layout. Advantage and disadvantage analysis of air-rail intermodalism were mainly been mentioned. This paper separately discusses the affecting factors, system integrate, operating mode, management pattern and so on about air-rail intermodalism. Development foreground and the feasibility and effectiveness of rail-air intermodalism are put forward in our countries. At last this paper simplifies analyzes the feasibility and operating characteristic of various transportation models connecting with this airport.
Study on Equalization of Urban-Rural Public Transportation
Authors: Li Li Hui , Wang Jun
Published: June 2012

Urban - rural public transportation is meaningful for promoting the urban and rural turnover, making the benefit of passenger resources comprehensive maximization. Equalization of urban-rural public transportation is important for coordinating of urban and rural development, promoting the integration of urban and rural areas, eliminating the urban and rural development imbalance .But it' not equal between urban and rural public traffic at present due to the demand, the management model different in China. It’s necessary to clear and improve the position of urban –rural public transportation in the social security system, to establish financial support system combine fairness and efficiency, establish the assessment and evaluation mechanism of urban-rural public transportation development level to promoting the development equally of urban-rural public transportation
Application of Multiple-Factor Prediction Model on the DALIAN New Airport`s Freight Traffic Volume
Authors: Zhang Xin , Zhang Feng , Luo Lei
Published: June 2012

In this article, the authors test whether the economic growth helps predict the Dalian New Airport`s cargo volume. In regression equations explaining cargo volume, the article uses various measures of economic data, including GDP, practitioner’s number, waterway freight traffic volume, highway freight traffic volume, tourists. This article choices the high correlation economic indexes to build the prediction model, use the model test the previous data, verify the feasibility of the model, and forecast the Dalian New Airport`s Cargo volume in the future.
The Research on the Optimization of Transportation Routing for Fresh Food by Improved Genetic Algorithm
Authors: Wu Ying , Meng Zi Bo , Peng Min
Published: June 2012

In this paper, we research the problem of transportation routing for fresh food. We analyzed the limit of soft and hard time windows in transportation and formed the time window with fuzzy appointment based on customer satisfaction. The optimization of transportation routes mathematical model was structured. The improved genetic algorithm has been applied to matlab progam. This progam has found the optimal solution in the model. We used a case to prove the feasibility of the model and the algorithm. It has twelve customers and one DC need to transport services. The mathematical model is to simulate the transport of fresh food within realistic.The transportation routing is designed to improve customer satisfaction and reduce transportation costs.
Study on Tabu Search Algorithm for Multi-Cargo Loading Problem
Authors: Ren Chun Yu
Published: June 2012

The paper is focused on the Multi-cargo Loading Problem (MCLP). Tabu search algorithm is an algorithm based on neighborhood search. According to the features of the problem, the essay centered the construct initial solution to construct neighborhood structure. For the operation, 1-move and 2-opt were applied, it can also fasten the speed of convergence, and boost the search efficiency. Finally, the good performance of this algorithm can be proved by experiment calculation and concrete examples.
Road Safety in Developing Countries - The Case of Transportation Management in Dar Es Salaam City
Authors: Mzee Philemon Kazimil , Chen Yan
Published: June 2012

Countries of the developing world are characterized by rapid urbanization, high growth rates in traffic and congestion and decreasing regulation of public transport. Because the majority of the developing world's inhabitants are dependent on public transport services for their mobility needs, the need for safe, effective and efficient public transport is essential to ensure adequate, affordable, accessibility and the continuing sustainable development of livelihoods in the rural and urban. Finally, recommendations are made to reduce both the severity and number of public transport accidents in the future. This paper highlights the historical road safety and the transportation management in Dar es Salaam. In the field of road traffic control and management, the primary policy objective is to develop appropriate institutional and organizational arrangement towards further efficient road use.
Research on Reasonable Method of Determining Toll Rate for Toll-by-Weight Expressway
Authors: Wei Lian Yu , Liu Yan , Ma Shi Bin
Published: June 2012

The expressway occupies an important position in the highway network for its many feathers such as having large capacity, being fast and safe and so on, playing the role as the backbone of transport. With the rapid development of China's national economy and road transportation, the toll-by-weight expressway is being used in larger areas. To go further in research of the toll-by-weight model, it is essential to determine the charging standard by weight, so as to promote this toll-by-weight model as an important part of long-term mechanism curing overweight transport. This paper analyses several methods of the existing toll-by-weight expressway.
The Design of Sunlight Collecting Machine in the Fiber Optic Lighting System
Authors: Zhu Zong Jiu , Cai Jia Xing
Published: June 2012

As the sunlight must illuminate the optical fiber in a certain angle in the fiber optic lighting system, a sunlight collecting machine is designed. It uses the 3DU51 light activated triode to transform the changes of sunlight's intensity which is caused by the position of the sun into electrical signals. And after the processing of ADC0809 converter, the signal is sended to AT89S51 single-chip microcomputer which will produce electrical signals to control the electromagnetic relay switches closed or disconnected, realizing that the driving motor can be controlled to start rotating and stop rotating automatically. So the sunlight collecting machine can track the position of the sun, collecting the most strong direct sunlight, improving the system's efficiency of collecting sunlight.
Serviceability Based Park and Ride Choice Behaviors Influenced by Road Toll Policy for Metropolitan Commuting Corridors
Authors: Zhao Hui , Yan Xue Dong , Zhang Cui Ping , An Mei Wu
Published: June 2012

Existing park and ride (P&R) facilities may enhance the serviceability of the transportation systems by redistributing travelers from vehicles mode to mass transit. As a tool in transportation demand management, road tolling policy will have an influence on the transportation system with P&R facilities. In this paper, impact of various road tolling policies on modal choice behaviors within context of commuting corridors with P&R services are investigated from the perspective of serviceability. The related road tolling schemes contains first-best toll, distance-based toll and cordon-based toll. The probability of commuters’ modal-choice is estimated using a stochastic equilibrium model. Innovatively, the serviceability concept is adopted to evaluate performances of different travel modes. Model results illustrate how transportation system performance is influenced by the different types of road tolling policies. Some of the results are concordant with empirical findings in the literature.
Choosing Destinations of Medium and Small Airports
Authors: Qu Yun Qian , Zhu Jin Fu
Published: June 2012

Usually the major airports have lots of air routes and scheduled flights. The intense competition turns passengers and cargoes of air transport to the major airports in a multi-airport system. It takes operating loss to many medium and small airports. From the view of airports, this paper analyzed the important factors of choosing destinations, and proposed a new indicator - air passenger traffic correlation. Finally, the optional destinations were collocated with the method of the Set Pair Analysis (SPA). Through the case analysis of Wuxi airport, the validity of method in this paper was verified. It provided the basis to choose destinations for medium and small airports.
A Structural Equation Model to Analyze Interrelationship between Activity Participation and Trip-Chaining of Nuclear Household
Authors: Yang Min , Li Dan , Wang Wei
Published: June 2012

Travel is derived from the necessity to engage in spatially-separated activities. Previous researches have demonstrated that socio-demographics have effects on activity-travel behavior, but few of them focus on the interactions between activity and trip-chaining, especially the influence of trip-chaining on activity. Based on the activity-travel survey data of Suzhou, China, in 2009, complex interactions between activity participation and trip-chaining behavior of nuclear household are explored using structural equation model. Model estimation results show that trade-off and complementarity exist among different types of activities and trip chains. Besides, trip-chaining generation is deeply affected by activity participation. Subsistence activity negatively affects trip-chaining characteristics, while maintenance and leisure activities positively affect it. Furthermore, feedbacks from trip-chaining characteristics to activity participation do exist. Travel time and the number of trip-chaining have significant effects on activity duration.
Investigation on a Passive Solar House Equipped with Water Thermal Storage Wall
Authors: Wang Wei Liang , Tian Zhe , Niu Xiao Lei , Xu Xin
Published: June 2012

The numerical simulation method is employed in this paper to study the indoor thermal performance of an existent passive solar house, south internal wall of which is equipped with water thermal storage tanks. The actual measured meteorological data of 2010 in Tianjin is applied in this study to obtain the hourly indoor temperature, and the indoor condition is assessed by the adaptive thermal comfort model. The results indicate that, cooling measures are not required during the summer in Tianjin weather condition when the water thermal storage wall is used combined with natural ventilation technology, thermal storage effect of the wall can reduce the indoor maximum temperature of 4 °C while increase the minimum temperature of 3°C, and make regulation of the heating system simple and feasible in the winter.
Railway Passenger Flow Volume Prediction Model Analysis Based on Cobb-Douglas Function
Authors: Du Xue Dong , Ren Na
Published: June 2012

A prediction model of train passenger flow volume is proposed in this article to help the railway administration's analysis of running strategies. The model is analysed based on industrial economic indexes and Cobb-Douglas theory to make the prediction. The model is illustrated by applying it to a numeral example, and the analysis of the error rate is made for further research.
Instability Analysis of High Pier of Continuous Rigid Frame Bridges
Authors: Dong Xiao Mei
Published: June 2012

The linear and nonlinear stability of continuous rigid frame bridge with thin-wall piers is analyzed by using the current FEM software. Linear stability analysis indicates that coefficient of stability in cantilever stage is poorest. Two aspects are included in nonlinear stability analysis. The first one, only geometric nonlinearity is considered and the other one, geometric nonlinearity and material nonlinearity are considered simultaneously. The results show that material nonlinearity is a factor to stability coefficient that can not be overlooked. Considered the dual non-linearity, the stability coefficient descends consumedly.
Factors Analysis on the Temperature Field of PC Box-Girder Bridge
Authors: Nie Yu Dong , Zhang Wei , Wang Zong Lin
Published: June 2012

Based on the Nenjiang Bridge located in the Qi-Gan expressway and using the finite element software ANSYS, we analysis the influences of solar radiation, free air temperature, inside temperature, wind speed, thermal conductivity of concrete, section height, flange plate length and bridge pavement on the temperature field of PC box-girder in this paper. And the solar radiation, thermal conductivity of concrete and bridge pavement is presented as the leading factors for the temperature field of PC box-girder.
Rail Elevated Bridge Bearing Displacement Monitoring Based on FBG Sensor
Authors: Li Sheng , Ning Qiang , Chen Hui
Published: June 2012

In order to know the bridge bearing operation condition, monitoring bearing displacement was an alternative way. Considering the special field environment of rail elevated bridge and some existing problems of EM-based sensors, needle-shape differential FBG displacement sensors were designed which ensured the long-term stability monitoring under EMI environment. Comparing to the wire-shape FBG displacement sensor, the contact measure type through the sensor needle-shape rod in this paper not only simplified the installation process in-situ, but also could reflect the accurate test direction of bridge bearing. The good linear relationship between sensor wavelength and load verified the rationality of designed differential structure. The practicability in actual engineering application of needle-shape FBG sensor was revealed by a certain rail elevated bridge bearing displacement continuous monitoring results.
Based on the Minimal Stress Method for the Determination of the Reasonable Completed Bridge Cable Force
Authors: Gao Shao Xia , Yu Bao Chu , Gao Chao , Wang Zhen Zhen
Published: June 2012

The cable-stayed bridge is a type of the bridges that can utilize the material properties fully and rationally.They are most favored by designers both at home and abroad with its good economic performance and crossover capability. we use the method of the minimal stress with constraints to optimize the cable force of the completed bridge under dead loads. In this way, we can attain the goal of reducing the project cost.