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21 August 2000, Volume 19 Issue 4 Previous Issue    Next Issue

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Optimum cable point analysis for erecting CFST arch truss ZHOU Shui-xing, ZHANG Min, ZHOU Jian-ting 2000, 19(4): 1-4.  Abstract ( )   PDF (176KB) ( )   This paper gives out a formula for calculation cable force according to concept Zero Moment,and discussing cable optimum point,the relation to cable force,cable point,tower height and tower distance.An example is given about a CFST arch at last. Related Articles | Metrics

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Calculation and analysis of transverse temperature stress for concrete box-girder SHAO Xu-dong, LI Li-feng, BAO Wei-gang 2000, 19(4): 5-10,14.  Abstract ( )   PDF (249KB) ( )   Refering to different rules on temperature gradient in five specifications,the paper calculates transverse stresses of temperature change for concrete box-girders of three bridge types,as well as makes an analysis of temperature sensitivity.The results indicate that temperature effect is one of important reasons causing the bridge deck crack. Related Articles | Metrics

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Application of hanger rod with BBRV anchorage and HiAm anchorage to half-through arch bridges LI Shi-bin 2000, 19(4): 11-14.  Abstract ( )   PDF (174KB) ( )   In this paper,the hanger rod with BBRV anchorage and HiAm anchorage are indroduced with manufacture,testing and installation of the hanger rod of Yanan Wangjiaping Bridge as an example.The purpose is to probe into the feasibility and applicability of the hanger rod in the engineering. Related Articles | Metrics

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The feasibility analysis of applying prestressed concrete with unbonded tendonds to bridge engineering ZHAO Can-hui, LIU Ri-sheng, LIU-Dong 2000, 19(4): 15-17.  Abstract ( )   PDF (134KB) ( )   Based on the analysis of the performence of prestressed concrete with unbonded,the feasibility of applying prestressed concrete with unbonded tendonds to bridge engineering is analysed so that the use of prestressed concrete with unbonded tendonds is spreaded. Related Articles | Metrics

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The research of asphalt mixture's rate of void WANG XU-dong, YING Peng-cheng, HE Zhao-yi 2000, 19(4): 18-21.  Abstract ( )   PDF (176KB) ( )   In this paper,some questions are discussed in the void test of the asphalt mixture,for example,calculations of the theatrical density of the mixture,measurement of the practical density and calculation of the void,e.g..By a large number of testing,some beneficial results are drawn about them. Related Articles | Metrics

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Study on asphalt mixture's road performance of dense framework structure CHEN Shuan-fa, HAO Pei-wen, WU Xiao-lin 2000, 19(4): 22-25.  Abstract ( )   PDF (158KB) ( )   In order to meet the need of high-grade highway's asphalt surface performance,this paper bases it theory on summarizing the latest research at home and abroad.At the same time,it indicates that asphalt mixture of dense framework structure,together with road performance and surface function,can meet the requirements of the using function of asphalt road.Compared with the commonly-used antiskid asphalt mixture and SMA,results show that asphalt mixture of dense framework type possesses better road performance. Related Articles | Metrics

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Research of maintenance criteria of asphalt pavement for high-graded roadway WANG Yan-li, WANG Bing-gang 2000, 19(4): 26-29.  Abstract ( )   PDF (172KB) ( )   This paper sets up the performance evaluation indices of asphalt pavement for high-graded roadway,and it presents the relevant maintenance criteria of each single performance index.It is of certain reference value to maintenance engineering. Related Articles | Metrics

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A study on PE modified asphalt ZHANG Zheng-qi 2000, 19(4): 30-32,37.  Abstract ( )   PDF (173KB) ( )   In this paper,the performance of PE modified asphalt is systematically studied,and meanwhile its modification mechanism is discussed.Study results indicate that the PE modified asphalt show expected properties and promise a bright application future. Related Articles | Metrics

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Optimization design of super fine sand concrete mixture for slipform paver in pavement LI Li, JIANG He 2000, 19(4): 33-37.  Abstract ( )   PDF (211KB) ( )   This paper mainly introduces the concrete mixture determining of super fine sand concrete for pavement as well as the relationships between the strength and its affection based on the research of the pavement construction on Chongqing-Changshou expressways. Related Articles | Metrics

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Study on the influence of time on the mortar strength through the cement paste thixotropy LI Fang-yuan, YANG Li, ZHU Ting 2000, 19(4): 38-41.  Abstract ( )   PDF (173KB) ( )   This paper analyzed the influence on the strength specimen by the internal crystalline structure of the non flow-promoter flowing mortar.The conclusions can be drawn from the test results that both the short-term compressive strength and the viscosity change with the destruction of the crystalline structure during the hydration of the mortar. Related Articles | Metrics

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The basic characteristics and harness of landslide and debris flow along the highway in Liangshan region WENG Qi-neng, ZHOU Jian-ting, LAI Yong, MA Yong-tai, CHEN Hong-kai 2000, 19(4): 42-46.  Abstract ( )   PDF (232KB) ( )   On the basis of investigation in-situ and analyses,loose deposit landslide and debris flow are main geological disaster and waste-watering along the highway in Liangshan region.The development is closely related with the geological & geomorphologic environment,but controlled by neoteconic stress filed (NSF).Landslide and debris flow coupled obviously,which sharps the highway disaster's happening frequency and force.Harmful manmade projects and economic actions intensify the developing course of landslide and debris flow.The harness to the landslide and debris flow along the highway in the region should insist the basic principle:"combine dredging to draining,various project measures all act". Related Articles | Metrics

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A study of developing macropattern of water-wasterings of region highways with neoteconic stress field——Takinyg Water-wasterings of Highways in Liangshan As Examples ZHOU Fu-chun, LAI Yong, WENG Qi-neng, ZHOU Jian-ting, MA Yong-tai, CHEN Hong-kai 2000, 19(4): 47-50.  Abstract ( )   PDF (181KB) ( )   This paper analyses Neoteconic Stress Field (NSF) of the three typical area in Liangshan (the Jinhe & Hexi area,the Pingchuan area,the East in Xichang),with scheideigger method of NSF,obtain angle of strike of main compressive stress the three region——294°、92.5°、336°.Based on statistics of the run of Highways of the three regions,the paper makes a contrastire analyses.As a result,they have obviously coupling relation and the NSF controls the macropattern of water wasterings of highways. Related Articles | Metrics

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A new design thread of soil nailing for stabilization of highway excavation WU Guo-xiong, LING Tian-qing, FENG Guang-le, QIAO Rui-hua 2000, 19(4): 51-54,63.  Abstract ( )   PDF (219KB) ( )   Soil nailing is a good structure for stabilization of highway excavation,and has been used widely in the world.Firstly,this paper analyses the disadvantages of traditional design method of soil nailing for stabilization and then poses a new design thread of soil nailing for stabilization of highway excavation,in order to offer theoretic evidence for engineering use. Related Articles | Metrics

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The application of reinforced steep soil slope to Chongqing-Changsou expressway YANG Xi-wu, XU Ji-jiang, WANG Duo-ying 2000, 19(4): 55-58.  Abstract ( )   PDF (179KB) ( )   The application of reinforced steep soil slope to Chongqing Changsou expressway is introduced in this paper:including that the design of reinforced steep soil slope,the construction craft of reinforcement and the beneficial result of demonstration reinforced slope project.The demonstration reinforced slope project indicates that the reinforced steep soil slope can not only enhance the stability of high fills slope but reduce the cost of high embankment construction.The demonstration reinforced soil slope has experienced two rainy seasons,the any slipping doesn't take place on the slope,and the stability of reinforced steep soil slope is proved. Related Articles | Metrics

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Research on optimal drain mechanism of under ground water in rock slope TANG Hong-mei, CHEN Hong-kai, WENG Qi-neng 2000, 19(4): 59-63.  Abstract ( )   PDF (220KB) ( )   On the basis of analysis to features and active mechanism of ground water in rock slope a drain model is provided in this paper.Then it sets up differential drain dominated equation.Finally,optimal drain directions are determined through sensitive analysis to the equation.The results are valuable in course of research on seepage of the ground water in slope rock mass,slope stability of reservoir banks and valid drain of rock landslides,which fertilizes studies of rock mass hydraulics and mountainous disaster. Related Articles | Metrics

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The influence of the geologic hazard of Wangjiayan upon the expressway FAN Zheng-xin 2000, 19(4): 64-66.  Abstract ( )   PDF (141KB) ( )   In this paper,from the analysis of the geographic environment and geologic hazard of Wangjiayan,we recognize the certainty of the harm to the highway engineering that caused by the edge zone of high platform. Related Articles | Metrics

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Adjustment of high accuracy three dimension network in bridge CHU Dong 2000, 19(4): 67-70.  Abstract ( )   PDF (220KB) ( )   This paper introduces a method of adjustment about high accuracy three dimension network.It is effective and reliable by explaining a project case. Related Articles | Metrics

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Two-dimensional mathematical model of excavation scheme on Hejia bar of Jialing river ZHOU Hua-jun 2000, 19(4): 71-76.  Abstract ( )   PDF (264KB) ( )   Variations of flow pattern,flow velocity in deep pool and side bar,mainstream thread,and water surface,caused by excavation project,are investigated by two-dimensional mathematical model in an orthogonal curvilinear coordinate system.The change of bed-load transport rate,and redeposition rate are predicted.The influences of the excavation project on navigation are analyzed.Grid-type and flat-type excavation alternatives are proposed and discussed. Related Articles | Metrics

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The study of law of mountain area channel flow route WU Xiu-guang, WANG Ping-yi 2000, 19(4): 77-79,85.  Abstract ( )   PDF (169KB) ( )   Through analyzing and arranging the actual data measured of mountain area rivers in southwest of China,we summarize:The ideal channel flow route should have sine derivative curve flow route,harmonized flow direction,good flow route corner and bigger curve radius.In addition,we put forward the application of the law in design of engineering. Related Articles | Metrics

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The study of river changes and behaviours of water flow on the Three Gorges dam zone WU Wu 2000, 19(4): 80-85.  Abstract ( )   PDF (249KB) ( )   This paper presents the achievement of the test study of river changes and behaviours of water flow on Three Gorges dam zone. Related Articles | Metrics

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Investigation on the regulation of branch river entrances in Three Gorges Reservoir PENG Kai, SHU Yun-long, WEN Chuan-ping, GUO De-chun 2000, 19(4): 86-90.  Abstract ( )   PDF (223KB) ( )   The influence of Three Gorges project on the water way of branch river entrance and waterway problems arising from the project have been investigated and analysed in this paper.Waterway regulation measures have been studied against the main entrances in the upper reach,the middle reach and the lower reach of the reservoir alternate back water and the reach ever in back water on the basis of existing research results on branch river entrances in Three Gorges reservoir.The regulation measures can be for reference before regulation projects are executed. Related Articles | Metrics

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Multi-purpose regulation scheme for Tongnan reach of Fujiang river ZHAO Zhi-zhou, ZHOU Hua-jun, LAN Bo, YANG Sheng-fa 2000, 19(4): 91-93,101.  Abstract ( )   PDF (188KB) ( )   Variation of flow condition caused by the multi purpose regulation schemes has been investigated on the basis of measured date in river model.Flood-control of the upper river,operation of the power-station,safety of the bridge and power-station,navigation and evolution of the river are analyzed.A reasonable and feasible project alternative and the improvement measurement are proposed. Related Articles | Metrics

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Discussing on application of the analytic hierarchy process to the rational arrangement of the international container port in the Yangtze River's trunk-line TAN Huai-qiu, ZHENG Qing-xiu 2000, 19(4): 94-101.  Abstract ( )   PDF (318KB) ( )   Aiming at the problems of the development of the international container transportation in the Yangtze River's trunk-line,this article detailedly discusses the affected factors and arrangement modes of the international container port rational arrangement with the analytic hierarchy process(AHP) in the system engineering theory and method,and makes an analysis relating practice.Practice shows AHP is an effective method of system hierarchy evaluation.The conclusion of the article possesses active reference to direct the container port construction. Related Articles | Metrics

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Numerical simulation of navigation WEN Cen, CHENG Gui fu 2000, 19(4): 102-105,109.  Abstract ( )   PDF (211KB) ( )   Researching the conditions of navigation in sea-route and realizing the influences to navigation of hydraulic engineering by mathematical model are speedy and economic.The methods and equations of simulating navigation are introduced by mathematics model in this paper.The better outcome is gained by applying the methods to simulate navigation. Related Articles | Metrics

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Static games among multi-transport modes in the change of transport corridor market——In the Background of Chengdu-Chongqing Transport Corridor HUANG Cheng-feng, YANG Xiu-tai, LI Yi 2000, 19(4): 106-109.  Abstract ( )   PDF (173KB) ( )   The static games among multi-transport modes in the structure change of transport corridors are imitated,and their economic behaviors,reasons,results,rational countermeasures and macro-control measures are also analyzed. Related Articles | Metrics

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Studies of fuel saving system of carburetter——on automobile coasting behaviour ZHOU Zhong-gan 2000, 19(4): 110-113,117.  Abstract ( )   PDF (207KB) ( )   This paper discusses characteristics of fuel saving system of carburetter when automobile run on coasting behaviour.It also describes the testing method and testing results. Related Articles | Metrics

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Study of the effect on teaching by aircraft noise around airport SHEN Ying, CHEN Rong-sheng, XIONG Wei 2000, 19(4): 114-117.  Abstract ( )   PDF (180KB) ( )   By investigation,aircraft noise has affected the teaching of schools around airport badly.So the paper specially researched the evaluation index and the threshold of aircraft noise inside the school's classrooms around airport.The paper concludes that a noise limit of Leq55 dBA and LAmax65 dBA inside the school's classrooms is reasonable.At the same time,in order to eliminate the difference of effect of the aircraft noise and other traffic noises on human which are of the same grade,the paper puts forward a new method which can evaluate aircraft noise inside the school's classrooms around airport. Related Articles | Metrics

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A CAI system of finite element method for beam structures WANG Jia-lin 2000, 19(4): 118-123,128.  Abstract ( )   PDF (458KB) ( )   In this paper,a CAI system to static and dynamic analyzing bridge structures is developed in Visual C++ under the Windows9x operation system.The structure figure,displacement state under loading,internal force figure,influence lines and dominant modes can be displayed in computer screen at one time.The visual and intuitional graphical interfaces can inspire the students' interests to study finite element method and Visual C++,and improve study effects.The system can be used as a means of teaching finite element method in beam structure mechanics and computer methods in bridge engineering. Related Articles | Metrics

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The applications on engineering practice by partial differential equation LI Zu-wei, HUANG Hua-hua, ZHONG Ning 2000, 19(4): 124-128.  Abstract ( )   PDF (211KB) ( )   The arbitrary difference precise integration method (ADPIM) is advanced to solve PDEs,from improving the subdomain precise integration method.The new one contains all the merits that the older one contains,and can also describe the physical properties of inhomogeneous media and convenient treatment of various boundary conditions,while the explicit integration Schemes given by ADPIM are proved unconditionally stable. Related Articles | Metrics