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15 December 2003, Volume 22 Issue 4 Previous Issue    Next Issue

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Fuzzy comprehensive evaluation in optimal selection of old bridge's reinforcement project ZHENG Xiao-gang，XIAO Sheng-xie 2003, 22(4): 1-3.  Abstract ( )   PDF (241KB) ( )   Because the influence factors in the selection of old bridge's reinforcement porposals is fuzzy,the comprehensive evaluation method is proposed in decision making of reinforcement project.The paper introduce the math model and process of this methoh in detail along with some example for test.The result shows that method is simple and useful,worthy of referring. References | Related Articles | Metrics

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The calculation of the lofting coordinate of the ring segments for the CFST arch bridges ZHANG Min 2003, 22(4): 4-6.  Abstract ( )   PDF (202KB) ( )   It's the important work for calculating the lofting coordinate of the ring segment for the concrete filled steel tubular arch bridges.The original method,which enlarged the model,took not only long time and many works,but also need a ladge field.The directly method on lofting coordinate by means of plane gemrtry relation may calculating heavily simply the procedure and improve the lofting precise.The formula can also apply to the reinforced concrete arch.Aflow chart was given in this paper for computer program.This method has been successfully introduced in many CFST arch bridges. References | Related Articles | Metrics

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Numerical simlation of dynamic emulation on construction process in Yangzong expressway tunnel ZHANG Peng-yong，XU Lin-sheng，WANG Xin-ping 2003, 22(4): 7-10.  Abstract ( )   PDF (325KB) ( )   On the bassis of S5optimized design drawing of 皿 surrounding rock masses and measured data in site in Yangzong expressway tunnel, obtaning Eand K of surrounding rock masses by back analysis ;the dynamic emulation simulatation of construction process has been conducted with FEM methods, feedback controlling design is realized and the construction is controlled. References | Related Articles | Metrics

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Simulating influence of soft rock on channel structure by using finite element method He Bing 2003, 22(4): 11-13.  Abstract ( )   PDF (347KB) ( )   This papre establishes the Finite Element model of soft rock channel by selecting proper creep model of soft rock.Taking a highway channel as an example ,influence of construction time of anchor rod and supproting structure on deformation and stress of channel structure is analyzed.The model of this paper can be used on other underground structures at soft rock region. References | Related Articles | Metrics

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Excavating tunnel construction plan analysis for mountain ridge highway tunnel XIONG Si-hua，FAN Cao-yuan 2003, 22(4): 14-16.  Abstract ( )   PDF (252KB) ( )   Excavating and exiting tunnel are the most complicated sites in the tunnel construction condiuons , while they are also the site of the most hidden dangerous in quality and safety . If we properly choose the plan of excavating tunnel , have the aid of some subsidiary construction measures and excavate naturally tunnel , we can effectively avoil the unstability of the mountain slope evoked by brushing slope arid pulling slot . consumedly decrease the engineering construction cost of turuiel protection protect ecosystem environment . References | Related Articles | Metrics

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Discussion of the forming mechanism of reflective cracks in pavement from the angle of deformation compatibility YI Zhi-jian 2003, 22(4): 17-19.  Abstract ( )   PDF (555KB) ( )   After the asphalt pavement is added on to the base or old pavement with existing creeks , the cracks will reflect into the paveirient. In the paper the forming mechanism of the reflective cracks is analyzed fnxu the angle of defommtion compatibility relation , and the prevention way of re0ective cracks discussed. References | Related Articles | Metrics

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Closed-traverse method of center-center lines of circles in horizqnt alignment design of road interchange WU Guo-xiong，CHEN-dou 2003, 22(4): 20-24.  Abstract ( )   PDF (360KB) ( )   The piper puts forward closed-traverse method of the lines of osculation and the closed-traverse method of the center-center lines of the circles . Based on the parameter equation of the track of the instantaneous center of the circle of the easement, its characters can be obtained, and then the lines of osculation and two through lines known commented to form the closed-traverse .According the arious compound styles ,corresponding methods can be found . Atlast ,design and calculation of horizontal alignment of interchange can be accomplished by using the calculating methods of easement alignment The design methods has been approed by examples . References | Related Articles | Metrics

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The research of englneeriiig database in Integrated CAD system of hlghway YANG Hong-zhi，XU Jin-hang，YANC Thao-wei 2003, 22(4): 25-28.  Abstract ( )   PDF (399KB) ( )   Based on the analysis of the data requirements and following in the highway design ,this discusses the character of engineering databased and plans the architecture structure of highway engineering database. This paper emphasizes on the expanding research of Relational Data Model. Further more ,it constructs the relationship-OOP model as the data model of engineering database. Based on those theorise and the special requests of data marupulation in highway design process, this paper has constructed the standard data query classes, plane engineering classes etc. And by enclosing these classes, the functions of database are expannded effectively and the highway engineering database and high standard database with the functions of real-time query, real-time modification, real-time storage and supporting distributing design has been constructed. References | Related Articles | Metrics

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A method to simulate elastoplastic beam HE Bing，WANG Xiao-yi 2003, 22(4): 29-32.  Abstract ( )   PDF (232KB) ( )   According to the requirement of bridge engineering , a equivalent element group model of elastoplastic beam is presented . This equivalent eminent group is composed of a beam element and a truss element group. The formulas are deduced according to the load-deformation curve of the elastoplastic beam . This equivalent element group model of elastoplastic beam is used on the piers of a bridge ,and the seismic responses are calculated out. References | Related Articles | Metrics

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Vehicle dynamic loads caused by the surface evenness YU Qing，CAO YUAN-wen 2003, 22(4): 32-34.  Abstract ( )   PDF (218KB) ( )   In this paper , 4-degree-of-freedom's vehicle model is developed, with the comideration of the influences of vehicle roll on dynamic loads caused by pavement roughness . By using this model , the vehicle dynamic loixle under different vehicle speeds and wave-lengths but the saw wave-highs pavement roughness. References | Related Articles | Metrics

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Creep buckling of braid composite cylindrical shell HE Huang，TANG Guo-jin，JIANG Zhi-gang，WANG Ke-sheng 2003, 22(4): 35-38.  Abstract ( )   PDF (270KB) ( )   A creep buckling armlysis of braid comjxsile cylindrical shell ie given in this papre by means of theoretical armlyeis ,the instantaneous cnncal load and dumble cntilcal load of viscoelastic braid conipceite cylindrical shell are calculated. References | Related Articles | Metrics

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Study on pavement performance of different types of asphalt mixtures LIU Hong-ying 2003, 22(4): 39-42.  Abstract ( )   PDF (330KB) ( )   The different gradabon asphalt niixlurie have great influence on pavement performance . The paper uniBzed wheel tracking tist at high temperature, the bend test at low temperture and bend fatigue test to study pavement performance of SMA and large size asphalt mixture (LSM) , and then it is compared with dense gardation asphalt mixture. The results show that modified asphalt can impmve significantly technical performance, SMA and LSM have super pavement performance , the resistance to deformation in high temperture and resistance to fatigue of LSM is bettr than that of SMA , but the performance resistance to crack of SMA at low temperture is better than LSM . References | Related Articles | Metrics

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Study on mixed design method of lean concrete for road base depend on flexural strength XU Jiang-pin，WANG Qiu-rong，WANG Bing-gan 2003, 22(4): 43-44.  Abstract ( )   PDF (214KB) ( )   Applying the formula of flexural strength with water/cement ratio and the experience value of water and sand by study , this paper put forward the mixed design method of lean concrete for road base. References | Related Articles | Metrics

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The research on capillary character of the soil of the tympanitic road in Tianshan Xinjiang municipality TANG Hong-mei，CHEN Hong-kai，YE Si-qiao 2003, 22(4): 45-48.  Abstract ( )   PDF (296KB) ( )   Based on the test on two typical and original soil sample of the tympanitic road from Nalati to Gongnaisi along G218 in Tianshan Xin-jiang Municipality, authors did the soil's capillary experiment, initiating the capillary coefficient Km. By testing, the capillary coefficient Km is about 10-3cm/s. By contrasting the four condition's, we obtained some useful conclusions , research offer a beneficial way to designing the structure in tyinpanitic region . References | Related Articles | Metrics

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Study on probability of landslides along the bank of Chongqing Reservoir TANG Hong-mei，TANG Fen，LIN Xiao-song，CHEN Hong-Kai 2003, 22(4): 49-52.  Abstract ( )   PDF (323KB) ( )   In the paper,based on Analysis on sensitive disaster factors of landslide,the authors select four modeas factors .If They add to one,probability of occurring Landslides is ana1yzed according to probability statistics.As an example of Wanzhou Qingquanlu landslide, we attain its probaility is 60.1%.The fact is truth. References | Related Articles | Metrics

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The post-construction settlement prediction of the surcharge preloading embankment on soft ground ZHOU Gang，CHEN Qian-ying，ZHOU YI-qin，LING Tran-qing 2003, 22(4): 53-56.  Abstract ( )   PDF (330KB) ( )   The experience method,such as the hyperbola method, which is often used in the engineering of highway embankment on soft ground , is incompetent for considering the influence of the variation of pretend, so it can't predict the post-construction setdenient of the surcharge pre-loading embankment well . By back-analysing the settlement of an surcharge preloading embankment , this paper fistly get the coefficient of settle-ment and the average coefficient of consolidation. Then utilizing these coefficients as calculation parameters and taking the influence of the sur-charge preload into account, this paper predict the post-construction settlement of an surcharge preloading embankment approximatively.For considering the influence of the surcharge preload, the result of this method is more coincident with the fact than that of the hyperbola method and other experience methods. References | Related Articles | Metrics

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Analysis of bearing capacity about reinforced-Earth foundation based on balance theory of no return TANG Fen，HE Cuang-Chun，XIE Yuan-guang 2003, 22(4): 57-60.  Abstract ( )   PDF (311KB) ( )   Firstly,it has shown two failure state of reinforced-earth foundation in this paper. One is dense reinformed-earth failure state which forms cutting-earth under the cushion,another is spare one that forms cutting-earth up the cushion Then based on limit equilibrium theory, bearing capacity of reinforced-earth foundation has analyzed . References | Related Articles | Metrics

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Disposal analyses of smal earth slide in improving soft ground of expressway FU Guang-qi，HONG Bao-ning，QIU Guo-feng 2003, 22(4): 61-63.  Abstract ( )   PDF (256KB) ( )   This paper based on practice construction item analyzed the cause of small earth slide in construction in detail, and brought forward a simple economy flexible disposal method. According as parallel analyse and calculation of stability theory, amended construction scheme of similarity section of road in time , prevented earth slide occurring again and obtained expectant purpose . References | Related Articles | Metrics

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The research on the rainfall erode of the compress roadbed slope-surface SHEN Bo，ZHENG Nan-xiang，TIAN Wei-ping 2003, 22(4): 64-67.  Abstract ( )   PDF (361KB) ( )   Researching on the highway compress roadbed slope rainfall erode formulas trem 7 various factors ,this pape has received a series of important results, which includes the different compressed soil erode formulas of Xi'an's, and the critically eroding gradient angles in different conditions of Xi'an's compressed soil, etc.these can be made as guidee in designing the rainfall compress roadbed slpoes . References | Related Articles | Metrics

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The testing research on physical and mechanics parameter of the loose earth and its relationships TANG Xing-li 2003, 22(4): 68-71.  Abstract ( )   PDF (316KB) ( )   Based on sensitive tests , the author makes the analysis of mathematical statistics among natural unit weight , water content , cohesion and friction angle . The results obvious the relationship of natural unit weight and water displays linear relationship , and go from strength to weak-ness along with adding pressure to the loose earth.C-φ displays distinct didisliner. ω-C-φ of high pressure is physical and mechanics parameters . When the containing water or moisture is from 10% to 13%,the pressure is highest . The increase of the pressure of unsaturated soil is the advance of pressure pammeters in nature . The conclusion in the paper has the important reference value to select the proper pammeters of earth . References | Related Articles | Metrics

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Briefly discusses the survey calculation way of highway LIAO Jiang-ping 2003, 22(4): 72-75.  Abstract ( )   PDF (272KB) ( )   Based on the survey and engineering practice in recent years,the authors summarize the mine way in the reading proffesses and ending proffesses.Application status of the same others is also recommended . References | Related Articles | Metrics

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Simulated study of realizing discrete convolution and discrete correlation by using fast fourier transform FU Xiao-lin 2003, 22(4): 76-79.  Abstract ( )   PDF (288KB) ( )   Operation of discrete convolution and discrete correlation will spend too much time to process a signal in time. Aimed at this deficiency , a fast operating method of discrete convolution and correlation is presented in this paper. Computer simulation is carried out and satisfying results are obtained. References | Related Articles | Metrics

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Preliminary research on highway development objectives of Chongqing municipality in 2010 LI Shu-qing，TANG Bai-ming 2003, 22(4): 80-84.  Abstract ( )   PDF (394KB) ( )   The paper ana]yses the highway development problems of Chongqing municipality. According to the sisocial economic development pattern and zone function of it in China,this paper uses three kinds of methods , which are the contrast analysis method and highway leading todestination or travelling time method, as well as social economic adaptatation method ,to discuss the necessary highway development objectives in order to almost realize all Xiaokimg sociality References | Related Articles | Metrics

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Fuzzy assessment on customer satisfaction degree for electronic toll collection project ZHU Tai-ying，JEAN Zhi-cai，YAo Hong-wei 2003, 22(4): 85-88.  Abstract ( )   PDF (353KB) ( )   Up to now the measure of Customer Satisfaction Degree(CSD) for Intelligent Transportation System projects is an unprecedented prob-lern in China.By making a study on Electronic Toll Collection (ETU)projects.this paper presents a fuzzy assessment model of the CSD for ETC projects based on perception quality. Then by making use of the model,the paper measures some CSD values according to the different percentage of vehicles equipped with ETC tage based on simulated problem.The model will offer quantitative support for both national ard local transportation departments to understand the various ETC projects impac which brings to customers. References | Related Articles | Metrics

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Monitoring games in road transport franchise bidding LI Jian-zhang 2003, 22(4): 89-92.  Abstract ( )   PDF (404KB) ( )   In this paper, by modelling the monitoring process in road transport franchise bidding as static games and dynamic games with complete information between transport firm and supervisor,the important role of monitoring has been investigated . References | Related Articles | Metrics

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Research on forecasting model of new blocks WU Jia-you，LIU SHU-Hong 2003, 22(4): 93-95.  Abstract ( )   PDF (226KB) ( )   For new urban districts,the traditional 4-phase transportation demand forccasting model can not meet the meet of the master planning due to the lack of the trip generation & distribution phase data.There are lots of difference between new blocks and constructed blcoks. How to differntiate the difference is a problem in traffic forecastin.Analyses based on locatpn potential energy proides a way to solve the problem . References | Related Articles | Metrics

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The theory basis and construction principle of the city logistic dirtribution system in main bub city LIU Wei-hua，ZHU Jian-jun，LUO Yan-jiang 2003, 22(4): 96-102.  Abstract ( )   PDF (640KB) ( )   With the logistic development in China, city logistic distribution is also got developed.In this paper, it defined the concept of the city logistic distribution system in main hub city, bring forward the main aims and restrictions of this system.The theory basis for its consmiction of this system is logistics system theory and SCM theory. Ulterior that,this paper brins forward principle to construct the interior construction and opration of this system. According to above,the main frame of this system is made. References | Related Articles | Metrics

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Evaluation of engineering geology of regional stability in the fault of Hunhe River ZUG Jian，KONC Qing-rui，ZUO Sha 2003, 22(4): 103-107.  Abstract ( )   PDF (390KB) ( )   The fault belt area of Hunhe River is situated in the northeastern part of Liarning Praince.It is an area of the heart in the Province. Several regional great faults connect and join here. The activity of the belt directly affects the safe of the cities Shengyang and Fushun.Through field investigation,sample tests,microstmctural analysis and the limited unitary mathematics or mechanical simulation, the author sets a preliminary value on the regional stability of the area . References | Related Articles | Metrics

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Infiltration design of urban drainage structure and improvement of ecological water environment CAI Xiao-yu，LINC LING Tian-qing，LUO Rong 2003, 22(4): 108-113.  Abstract ( )   PDF (483KB) ( )   Analyzing the composition and problems of urban ecolgical water environment ,and their effects on the urban climate,the author raised a method to improve urban ecological water environment by infiltration design of drainage stucture.This paper also discusses some advanced infiltration design and evaluation of infiltration performance in Taiwan and abroad. References | Related Articles | Metrics

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Test research on prestressed concrete berthing pile XU Xi-bin，TU Zhong-ren 2003, 22(4): 114-117.  Abstract ( )   PDF (617KB) ( )   By testing on the characteristics of four prestressed concrete berthing-piles and doing theoretical calculations . This paper diecuaeed the influence caused by parameters such as initial tensile strese、strength of concrete and ratio of reinforcing bar.Based on the results,some suggestions for poetical design are given. References | Related Articles | Metrics

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The experimental study on waterway regulation for the Xialong shoal of Hongshui River YIN Chong-qing，FU Hua，PENG Kai，DU Zong-wei 2003, 22(4): 119-122.  Abstract ( )   PDF (323KB) ( )   The Xialong shoal, which lies in the upstream of the Hongshui River, is one of the important shoals with the curve and shallow characteristic . Combining with the model test result on waterway regulation for the Xialong shoal, the properties and the ahoal and the conditions of the constructing waterway is analysed in this paper. By adopting such engineering measiues as dredging, cutting the snout of the shoal and exp1oring the reef, the navigation channel is normalized, the navigation depth is increased , the gradient ratio is reduced , and the flow condition is improved.Then the problems obstructing the waterway have been effectively solved. The favourable waterway conditions have been provided for the s1ipping to safely sail. References | Related Articles | Metrics

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Design and application of the reservoir area flood control information system WANG Miao-lin，YANG Yun-yun 2003, 22(4): 123-125.  Abstract ( )   PDF (638KB) ( )   The design scheme and application of the Reservoir area flood control information system are introduced . The component and function of the system , the purpose of software design , program development tools and such are included. The system has been put in use in Chongqing flood control departments since 2001 . It is provided with the characteristics of reliable operation , easy control and good stability as the application practice proved. The accuracy and efficiency of information transmission have been improved and the work tense of the operator on duty has been mitigated after the application of the system . References | Related Articles | Metrics

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Practice and research for constrcting foible staff room powerfulto improve stalk specialty integration ability WANG Shou-xu，LING Yue-hong，ZHOU Xian，ZHOU Xue-lin 2003, 22(4): 126-128.  Abstract ( )   PDF (270KB) ( )   Teaching and sclence of foible staff room are neglected at fund, teachers, equipment, etc.This lead to impact the constrcting and developing of stalk specia1ty.and impact synthesis qualitative seriously.So foible staff room only innovate and develop with stalk specialty,and the alumni may become advanced talents with synthesis ability and qualitative . References | Related Articles | Metrics