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20 June 2001, Volume 20 Issue 2 Previous Issue    Next Issue

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Introduction of reasonable bearing form of curved-girder bridge in high-speed railway SHAN De shan,LI Qiao 2001, 20(2): 1-5.  Abstract ( )   PDF (184KB) ( )   Many scholars have been studied the reasonable str uc tural form of bridge in high-speed railway and got a lot of valuable conclusion s.But most of their work are focused on the straight girder bridges.In this pape r we discuss the reasonable structural form about curved girder bridges in high -speed railway. Related Articles | Metrics

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The Application of the COONS curved-surface in the high-level profile design of intersection WU Guo xiong,YAN Qiang,SUN Jia si 2001, 20(2): 6-8.  Abstract ( )   PDF (111KB) ( )   The bulk of time and effort go to design high-lev el profile of intersection by using existing method.Regarding the design of inters ection as that of curved surface,the paper introduces a new method which can dra w out quickly contour line of intersection by using the COONS curved-surface fu nction,and gain the elevation of random station.The designer can adjust simultan eously the design process and reach an ideal result.This design method is very f ast,convenient and efficacious. Related Articles | Metrics

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Interval FEM used in the calculation of bridge and structural response under combinatorial loads LIU Shan hong1, WEI Jian dong1, YANG Yong xian2 2001, 20(2): 9-12.  Abstract ( )   PDF (133KB) ( )   The loading uncertainties of bridge and structure ma y be expressed by the upper and lower boundaries of an interval.The interval Fin i te Element Method(FEM) is used to obtain the conservative bounds for the displac ement and force response quantities.The linear elastic beam elements are applied in the discretization of a real bridge.The bounded intervals are used in express i ng the load vector with unertainties.The conservative bounds for the response qu antities are determined by the theory of interval algebra and linear elastic pro g ramming.Then,the conservative bounds for the response can be obtained.The propos ed formulation is applied to the practical design of bridge and structure loadin g combinations.The results of an example indicate that the method used here is c onvenient and simple.This method also has small calculation work and is suitable to calculate the loading combinations of bridges and structures in the practica l design. Related Articles | Metrics

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The autostress design method for design and evaluation for steel beam bridge ZHENG Ming xun 2001, 20(2): 13-18.  Abstract ( )   PDF (136KB) ( )   This paper makes a point that the method,or the sp ec ial plastic design method of steel struction,which has be come the advanced dire ction of design or evaluation for steel beam bridge when the autostress design ( shakedown design) is analyzed and introduced. Related Articles | Metrics

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Computation of highth of the bridge model in construction ZENG De rong1, CAO Xiao chuan2 2001, 20(2): 19-21.  Abstract ( )   PDF (114KB) ( )   The paper details the principle and method of mode l of bridge in construction,and the relation of analysis advance and back.The rele vant views and methods are given by the author. Related Articles | Metrics

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Comments on the vibrational frequence equation of three-span simple supported suspension bridge CHENG Xiang yun 2001, 20(2): 22-24.  Abstract ( )   PDF (168KB) ( )   This paper deduced the vibrational frequence equat io n of three-span simple supported suspension bridge in details,which was develop ed in the reference.Corrections have also been made regarding the errors in the equation. Related Articles | Metrics

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Analysis of Yueyang Dongtinghu Bridge at construction stage XIA Gui yun 2001, 20(2): 25-29.  Abstract ( )   PDF (125KB) ( )   The stiffness matrix of constitutive model element i n cable-stayed bridge with beam-and-slab decks is deduced.Using this kind of element,space analysis of Yueyang Dongtinghu Bridge shows that the precision is enough for bridge engineering. Related Articles | Metrics

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Stiffness method for skew curved bridges JIANG Zhi gang 2001, 20(2): 30-34.  Abstract ( )   PDF (225KB) ( )   In this paper,the girder of curved bridges was tak en as normal curved beam structure.Based on the schemes of different support condi tions of skew curved bridges,the nodal-axis-system was utilised.The element st iffness matrix of skew curcular beam have been developed.The equivalent nodal fo rce vectors subjected to usual loads were also derived by force method.Some nume rical results of two examples were given.This method is simple,actual and reliab le.It can be used to calculate the skew continous curved girder bridges,the skew continous curved ridgid frame bridges and the curved ridgid fram in buildin g structures. Related Articles | Metrics

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Research of contract scale of highway construction and scale profits of construction company WANG Cheng min1,WANG Heng bin2,JIA Lian sheng2 2001, 20(2): 35-38.  Abstract ( )   PDF (161KB) ( )   This paper puts forward the problem of contract sc al e of expressway construction and scale profits of construction company,according to the practical circumstances of expressway construction in our country and the future development of expressway in the following five years.It discusses n ot only the concepet?essence and contents of the problem but also the key facto r to the solution to the problem and ways used for reference. Related Articles | Metrics

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Optimization of multiobjective resource leveling using genetic algorithms WANG Shou xu,ZHOU Xue lin 2001, 20(2): 39-45.  Abstract ( )   PDF (131KB) ( )   In this paper,a model is founded using Genetic Alg or ithms technique.Genetic operator and facet condition are studied in an arrow net work scheme,and a synthetic distribution is generated by digitizing quantities o f resources(labor, material, mechanics).According to conditions of mult iobjective optimization,a near-optimum solution is obtained.The experiments pro ve it is a method of high speed and high fidelity,and it will be used widely in civil engineering. Related Articles | Metrics

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The polymer SBS modified asphalt mechanism analysis LI Ming guo1,LIANG Nai xing2 2001, 20(2): 46-49.  Abstract ( )   PDF (122KB) ( )   Starting from polymer SBS improved performance of radical asphalt,this paper analyses the mechanism of modified asphalt by the fou r component changing in fore and aft modification.Moreover we can deduce relation s between the changes of asphalt components and pavement performance. Related Articles | Metrics

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Study on industrial parameter of SBS polymer-modified asphalt HAO Pei wen,ZHANG Yi luo,JIANG Jian kong,XU Yong ming 2001, 20(2): 50-53.  Abstract ( )   PDF (186KB) ( )   The paper studied SBS polymer modified asphalt.It an alysed effect of blend time and temperature on SBS polymer modified asphalt prop erties,and the results show the effective blend time for Japanese asphalt,SLi as p halt and LAL asphalt modified with SBS polymer are espectively 3 hours,3 hours a nd 4 hours,based on temperature susceptibility?high temperature stability and l ow temperature stability of asphalt.With the increase of the blend temperature, the temperature susceptibility of SBS polymer modified asphalt is decreased,the soft point and ductility at low temperature are increased,and it shows that incr easing of blend temperature is beneficial to compatibility between SBS polymer a nd asphalt. Related Articles | Metrics

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Method discussion of transport organization during the period of the construction of metro in metropolis MAO Hui,XIE Zhi ming 2001, 20(2): 54-58.  Abstract ( )   PDF (168KB) ( )   Based on characteristics of the metro construction,a technology route is proposed in this paper about transport organization scheme during the period of construction of metro in metropolis by using the traffic en gineering bascial theory.This paper takes the circumstance of Metro Line No2 i n Guangzhou City as an example. Related Articles | Metrics

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Analysis of mechanism of base-watering of highways and anti-destroy structure in mountainous area--Taking Base-watering of Highways in Liangshan Area as an Example ZHU Xiao yin,CHEN Hong kai,WENG Qi neng,ZHOU Fu chun 2001, 20(2): 59-64.  Abstract ( )   PDF (233KB) ( )   Base-watering of highways is the main wasting of hi ghway in mountainous area.This paper analyzes base-watering of highways in moun tainous area,taking base-watering of highways in Liangshan area as an example.A nd we suggest the effective anti-destroy structure against topography,geomorpho logy,tectonic and hydro-meteorology of this area.The base-watering of highways of this area can be divided into four types,i.e.slide inducing,mud-rock flow i nducing,river flow inducing,and foundation losing efficacy.This cl assification has enriched connotation of base-watering of highways. Related Articles | Metrics

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Research on substances startup types and mechanisms of debris flows in impact-deposit deposit debris flow valleys(Ⅰ) TANG Hong mei,WENG Qi neng,WANG Kai,WANG Rong,YUAN Jian yi,CHEN Hong kai 2001, 20(2): 65-68.  Abstract ( )   PDF (190KB) ( )   Debris flow is a kind of high indicator compound l iq uid composed of water,sand and little rock,which is the movement of solid and li quid whose particles have great difference in size.In the debris flows movemen t sand and little rock mainly move in rolling and leaping.Debris flow is a short stage phenomena for a short time in the course of the valleys radical evoluti on,and its a typical calamity course.Based on explorations in-situ spot and d eeply researches,the author analyzed the the basic characters of the highways debr is flows,also proposed the debris flows startup conditions and types. Related Articles | Metrics

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Research on substances startup types and mechanisms of debris flows in impact-deposit debris flow valleys(Ⅱ) TANG Hong mei,WENG Qi neng,WANG Kai,WANG Rong,YUAN Jian yi,CHEN Hong kai 2001, 20(2): 69-72.  Abstract ( )   PDF (136KB) ( )   In this paper,the authors analyzed the basic chara ct ers and the startup conditions of the highways debris flows,also proposed one of the debris flows startup conditions and types. Related Articles | Metrics

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Ultrasonic tomography technology and its applications in undamage test of bridge foundation piles ZHAO Ming jie,XU Rong 2001, 20(2): 73-77.  Abstract ( )   PDF (274KB) ( )   The ultrasonic tomography technology was employed in undamage test of large bridge foundation piles in order to measure damage of co ncrete in this paper.The measuring result of an engineering example indicated th at the ultrasonic tomography technology is a good method in the quality evaluati on of bridge foundation piles. Related Articles | Metrics

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Study of the Property of structure combined prestressing cables with drilling piles ZENG De rong1, LI Lin2 2001, 20(2): 78-82.  Abstract ( )   PDF (165KB) ( )   The paper details experimetns of the structure whi ch is made of prestressing cables and drilling piles,and gives results from labora tory and field,on the bass,presents some views of design of the structure.A few of problems are discussed. Related Articles | Metrics

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Application of impact compaction in Wanzhou Airport high embankment HE Zhao yi1,SUN Yong2,ZHAO Chuan1,ZHU Hong zhou1,CHEN Shong ming3,LING Xing ding3 2001, 20(2): 83-86.  Abstract ( )   PDF (130KB) ( )   Regard to Wanzhou airport high embankment construc ti on,impact compaction method used for filling reinforcement and field tests is ca rried out.The results of tests show that the impact energy of 2000 kN·m,a dista nce of 35 m and loose thickness of 40 m are reasonable. Related Articles | Metrics

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Improved L-P method and its application in strongly nonlinear problems YUAN Yi wu1, YAN Jian jun2, LIU Jie3 2001, 20(2): 87-89.  Abstract ( )   PDF (127KB) ( )   In this paper,using the improved L-P method,the a ut hor seeks to solve the initial value problems of the strongly nonlinear Duffing equation and a class of nonoscillation type differential equation.Its calcultati o n process is quite simple and the accuracy of the results of this paper is bette r than that of the improved L-P method proposed by ZHANG Y.Q. Related Articles | Metrics

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A new method of route surevys about layout side slope stakes CAO Zhi xiang 2001, 20(2): 90-93.  Abstract ( )   PDF (134KB) ( )   A new method which neither center stakes nor cross - sectional directions about route layout side slope stakes from traverse stations,is discussed in this paper.It is demonstrated high effciency in practice.The ne w method can be generalized in route layout survey. Related Articles | Metrics

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Inquiry into the treatment of highway slide slope and the tunnel cavern out on the land of Chongqing area ZHANG Xue lin 2001, 20(2): 94-95.  Abstract ( )   PDF (98KB) ( )   In this paper,we inquired into the treatment of hi ghway slide slope and the tunnel cavern out on the land of Chongqing area. Related Articles | Metrics

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Managing engineering measurement and payment by Excel HUANG Xian gui1, LU Si xin2 2001, 20(2): 96-98.  Abstract ( )   PDF (125KB) ( )   Pressing through form conformation,this paper intr od uces to make use of Excel such as the sort gather and screen out and data aducti on data functions to achieve engineering measurment and payment management.This paper has theoretical and practical value for the measurement and payment of eng ineering projects. Related Articles | Metrics

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Inquiry into the treatment of the water & soil conservati on of the mountain highway LI Guo wei1, XU Ji jiang1,LI Xin wang1,HUANG Xiao wei 2 2001, 20(2): 99-102.  Abstract ( )   PDF (127KB) ( )   In this paper,we introduced the treatment of the w ater loss and soil erosion of mountain highways side slope planting grass. Related Articles | Metrics

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An analysis of grout injection technique applied in the stregthening of the tunnel’s surrounding rock LIAO Shu zhong,ZHENG Zhi jun 2001, 20(2): 103-105.  Abstract ( )   PDF (151KB) ( )   Through combining the analysis of materials and pr in ciple of the grout injection with the engineering example,it is clear that the a pplication of grout injection technique in dealing with the problem of bad geolo gy is feasible. Related Articles | Metrics

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Main points of the design and construction technique of the Shihe tunnel beneath the railway YE Chao ming, ZHENG Zhi jun, CHEN Xiao man 2001, 20(2): 106-109.  Abstract ( )   PDF (208KB) ( )   Owing to the landslide and unsteady slop because o f the railway cut,the section of Shihe tunnel beneath the railway is very difficu lt to construct. In this engineering field,the long tubular shanty grout inject ion and some new relevant techniques are adopted.It proves that it is effective to reduce the vibration and strengthening surrounding rock. Related Articles | Metrics

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The development of JGⅡ-V30 general software in Three Gorge pivot ship model experiment CAI Chuang 2001, 20(2): 110-115.  Abstract ( )   PDF (144KB) ( )   The JGⅡ-V30 general software used in ship mode l experiment,has unique aspect in judging the stance of ship model,calculating sai l ing factors,the capacity of anti-disturbing,adjusting error,programming and the interface making etc.The software supports the CMZ-3B ship model automatic exp erimental system;realizes the rapidly continuous untou ched remote and real-time controlling with the horizontal movement.It also real izes automation of the "Z" shape whole experiment process. software is capable in data processing,drawing and showing.It improves the e xperimental efficiency and accuracy,provides the navigable ship model with power ful means,and takes an important role in Three Gorge Project navigable ship mod el experiment.? Related Articles | Metrics

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The ways of applying AutoCAD graphics files to network LI Lin 2001, 20(2): 116-120.  Abstract ( )   PDF (303KB) ( )   This article briefly introduces how to realize the s hare in network by using the picture documents drawn by AutoCAD software,as well as the way to realize different disciplines picture library(or symbol library ) into network.This way is not only easy to be realized,but also practicable.Bec ause its very simple to operate,and more convenient to use,this way is very po pular in many designers.It is believed that this way will play a more important role in the using of network,and of certain value in the popularization. Related Articles | Metrics