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20 September 2001, Volume 20 Issue 3 Previous Issue    Next Issue

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Comparison of algorithm for calculating non-stress length of cable in long-span cable-stayed bridges HAO Chao 1,PEI Min shan 2,QIANG Shi zhong 1 2001, 20(3): 1-3.  Abstract ( )   PDF (111KB) ( )   The formulas for calculating the non stress length of cable using catenary theory and parabola theory are derived. Taking Nancha cable stayed bridge of Nanjing Second Yangtz River Bridge as a numerical example,the difference of the non stress length of cable using the catenary and parabola theory is analyzed.It is concluded that using parabola theory to calculate the non stress length of cable can meet the requirement of precision. Related Articles | Metrics

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Installation technology of ropeway in suspension bridges construction application BAO Li xin,YU Yuan liang,LIN Hui yu 2001, 20(3): 4-6.  Abstract ( )   PDF (143KB) ( )   In this paper, ropeway technology has been studied, which is beam installation about suspension bridges. Two methods have been applied in analysis on the ropeway disposition and checking of suspension bridges. A fine arithmetic method is derived from theory. The example points out some significative conclusions, which is about Chongqing egongyan changjiang river bridge. Related Articles | Metrics

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Crack analysis and reinforcement for gravity abutment in Yangliu Bridge ZHOU Shui xing, ZHANG Min 2001, 20(3): 7-10.  Abstract ( )   PDF (141KB) ( )   The crack reasons for gravity abutment in Yangliu Bridge is analyzed in this paper,and it put forward reinforcement scheme based on demage reason According to this,serval suggestions for wide and high abutment in design and construction are put forward. Related Articles | Metrics

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Design of special hydrology and multi-line oblique crossing bridges in Changshao Station of Xikang railway WANG Li 2001, 20(3): 11-15.  Abstract ( )   PDF (164KB) ( )   Changshao and Bamuping Qianyou River bridge is a key bridge that controls line plan of Xikang Railway. It is also one of oblique crossed multi line bridge at home at present. In this article, special hydrology around the bridge sites, hydrotechnological model tests and the designing process are to be introduced. They are helpful to the design of multi line bridges in the future. Related Articles | Metrics

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Crack control and calculation of the PPC flexural members LIU Shan hong 1, WEI Jian dong 1, FENG Xiao 2 2001, 20(3): 16-22.  Abstract ( )   PDF (207KB) ( )   The developing cracks lead to the stiffness change of Partially Prestressed Concrete(PPC)beams.The width of cracks are controlled by the method of layout suitable non pre bar so that the serviceability of structures are controlled.The mechanism of cracks occurring is discussed according to the deformation theory and the corresponding formulae are gained.The calculation results are compared with the testing results. The cracking load levels and the cracking spaces of the calculation is fit to that of testing.More testing research and theory work are needed to do at the aspects of calculating the crack width. Related Articles | Metrics

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Evaluation for load bearing capacity of R C arch bridge with dynamic method LUO Na 1,HU Da lin 1,REN Shao qiang 2 2001, 20(3): 23-27.  Abstract ( )   PDF (185KB) ( )   By the means of experimental model,a failure test was carried out to the model. From the obtained first and second order nature frequencies of the model under each class of loading,tension(compression) resisting stiffness and anti flexure stiffness were induced adversely and can be used as computational stiffness to calibrate arch bridges internal forces and deformations, with which a comparison can be made to the results of theoretical design and static test.The comparison shows that the dynamic method has the advantages of timesaving and convenience Related Articles | Metrics

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The research of casting technology of twisting steel rope’s hot-casting sockets DENG Zhi gang, CHEN Wei feng 2001, 20(3): 28-31.  Abstract ( )   PDF (131KB) ( )   By the research of both the suspending strand of HUMEN bridge and the footbridge of JIANGYIN bridge, it is introduced at length in this article that the results of testing research and the analysis of the hot casting in the two bridges hot casting sockets.The casting technology of twisting steel ropes hot casting sockets is introduced in this article,too. Related Articles | Metrics

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Long-lasting anticorrosion coating technique and its application in Chengdu Funan River steel tuble arch bridge ZHENG Wei 2001, 20(3): 32-34.  Abstract ( )   PDF (103KB) ( )   The application of Long lasting anticorrosion coating technique in many areas is introduced in the paper.In China the anticorrosion coating is much less used for bridge, the paper introduceds in detail its application in Chengdu Funan River tuble filled steel arch bridge.Compared with other anticorrosion methods the long lasting anticorrosion coating is not only long lasting but also costs less in the long run. Related Articles | Metrics

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Application of montcaro in bridge network of optimization design CHU Dong 2001, 20(3): 35-37.  Abstract ( )   PDF (107KB) ( )   This paper discusses the method of making accidental error by Montcaro.The result what accident error of simulates attend in adjustment is consistent with result of error transmit law.It is determination feasibility of Montcaro. Related Articles | Metrics

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A brief summary of the explosion construction technique in the road and tunnel engineering ZHENG Zhi jun,LIU Li 2001, 20(3): 38-40.  Abstract ( )   PDF (145KB) ( )   Through the analysis of some key factors of explosion, the relevant technique index is presented,furthermore, some improvements are also made at last,and a construction programme of explosion on tunnel which is effective and feasible is presented. Related Articles | Metrics

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The property of crack-resistance and waterproofing of Durafibre CAO Ya hua 1, JIANG Wei zhong 2 2001, 20(3): 41-44.  Abstract ( )   PDF (130KB) ( )   Durafibre is a monosilk bundle polypropylene fibre with high strength and low modulus of elasticity.This paper studies the property of Durafibre concrete using the mechanism of fibre crack prevention and the principle of power consumption.It has been proved that Durafibre can prevent concrete from cracking very well and improve the property of leakage resistance and waterproofing effectively.Durafibre can apply to the self wateproofing structure of concrete. Related Articles | Metrics

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Study on the dynamic properties of the interaction between working installations of paver and roller compacted concrete YANG Shi min,SUN Zu wang 2001, 20(3): 45-48.  Abstract ( )   PDF (142KB) ( )   We designed the large scale test equipment and completed a large number of indoor paving experiments for Foller Compacted Concrete(RCC) pavements by means of orthogonal experiments.The regularity that the mechanical parameters of pavers working installations and RCC mix parameters influence the initial density and rollability of RCC pavements is studied.The mechanical parameters and RCC mix parameters are obtained when the results of the interaction between working installations of paver and RCC mixture are the best and the forming pavement qualities(including the initial density,pasted forming performance and rollability)are optimum. Related Articles | Metrics

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Study on the axle load conversion method of the traffic volume survey station data LIU Zhao hui, LI Yu zhi,QIN Ren jie 2001, 20(3): 49-53.  Abstract ( )   PDF (152KB) ( )   In this paper,combined with the traffic composition of Lou Zhou Road,the conversion factor of vehicle type were gained by using the weighted mean method in order to converse the traffic volume of vehicle type got by traffic volume survey station to equivalent standard axles. It can accurately converse the traffic volume survey station data to equivalent standard axle load action time for pavement structure design. Related Articles | Metrics

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The application of polyurethane coke tar on the 2nd order highway’s cement concrete parement XU Ji jiang 1, XIE Yang fu 1,QIAN Tong jun 2 2001, 20(3): 54-56.  Abstract ( )   PDF (103KB) ( )   In this paper we introduced the use of polyurethane coke tar on the 2nd order highways cement concrete pavement and contained the composition,behavior and technigue. Related Articles | Metrics

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Analysis for additional stress in pavement due to thawing settlement of permafrost subgrade CAO Dong wei,HU Chang shun 2001, 20(3): 57-61.  Abstract ( )   PDF (171KB) ( )   In the permafrost regions,the thawing settlement in the subgrade may produce an additional stress in the pavement structure.In this paper the finite element method and analytical method are adopted to analyse the additional stress,and two kinds of calculation results are compared.The formula is deduced out to calculate the additional stress and the influence of the pavements parameter are analyzed.The proposals are put forward for the design of subgrade and pavement in permafrost region. Related Articles | Metrics

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Laboratory study on stability of veneer cover soil on the slope of expansive soil subgrade HE Li jiang 2001, 20(3): 62-64.  Abstract ( )   PDF (136KB) ( )   Use of veneer cover soil on the side slope of expansive soil subgrade is a method to prevent early failure of expansive soil subgrade.But the interface between the veneer cover soil and the subgrade becomes a new weak point to the whole subgrade.That leads to another stability problem of veneer cover soil its own.To the problem of analyzing the stability of veneer cover soil of equal thickness,the most commonly used methods are based on the assumption that slopes were infinite in length. But the side slopes of subgrade are finite in length,so these methods may not be suitable to be used in that case.Through laboratory study,it is found that the actual sliding surface occurred in veneer cover soil on finite slope is different from that of commonly used methods mentioned above.According to the actual sliding surface from laboratory study,this paper develops a new formula for calculating the stability factor of veneer cover soil on the side slope of expansive soil suograde.In the end,some conclusions are also presented. Related Articles | Metrics

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Compacting factor assessment of embankment filled with coarse grained soil LAN Chao 2001, 20(3): 65-68.  Abstract ( )   PDF (124KB) ( )   This paper analyses characteristics of coarse grained soil and its compacting character, and points out that equivalent is important during compacting factor assessment of embankment filled with coarse grained soil, as well as indicates right indexes and proper methods of assessment of compacting factor that we should select. Related Articles | Metrics

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The study on fill construction controlling of Wanzhou Wuqiao Airport high embankment HE Zhao yi 1, ZHAO Chuan 1,ZHU Hong zhou 1,CHEN Shong ming 2,LIN Xin dong 2 2001, 20(3): 69-71.  Abstract ( )   PDF (109KB) ( )   Regarding to rolling tests on construction of Wanzhou Wuqiao airport high embankment, rolling tests of 33t and 50t vibratory roller were carried out in the construction site.As a result,the number of rolling passes,subsidence,thickness of loose fill material,and maximum particle of fill materials is suggested as a guidance for construction. Related Articles | Metrics

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Analysis on rational scale of highway construction company(I) WANG Cheng min 1, WANG Li ming 2,LEI Jing 2 2001, 20(3): 72-76.  Abstract ( )   PDF (156KB) ( )   This paper,based on the construction case of the guangdong changda highway construction company,explains the meaning of economics of scale and analyses the reason for gaining the scale profit.At last,it puts forward the measure to gain scale profit for construction company. Related Articles | Metrics

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An investigation on the issue of sharing responsibility for engineering accidents arising from quality TU Zhong ren 2001, 20(3): 77-79.  Abstract ( )   PDF (123KB) ( )   According to the related laws and regulations of our country,the issue of sharing responsibility for engineering accidents arising from quality,which should be beared by the project constructing action main body,has been discussed in this paper.It is very important for them to strengthen the quality consciousness and legal consciousness. Related Articles | Metrics

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On engineering measurement superision HUANG Xian gui 2001, 20(3): 80-82.  Abstract ( )   PDF (125KB) ( )   The paper brings forward the requirement of engineering measurement,and divides it into three stages.On each stage in puts forward essentials for standard fill in and examination and verification of the engineering measurement basic materials.For engineering measurement superision it provides with academic and practical reference. Related Articles | Metrics

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The evaluation of seismic slope stability analysis methods LIU Li ping 1, LEI Zun yu 1,ZHOU Fu chun 2 2001, 20(3): 83-88.  Abstract ( )   PDF (182KB) ( )   On the basis of the different seismic effects,seismic slope instabilities may be grouped in to two categories:inertial instability and weakening instability.A number of techniques for the analysis of inertial instability have been proposed,such as pseudostatic analysis,Newmark sliding block analysis,stress deformation analysis and probabilistic analysis.Weakening instability can be divided into flow failures and deformation failures.The development,application and characteristic of those methods are summarized in this paper.And the main content,the existing problem and trend to the seismic slope analysis are proposed. Related Articles | Metrics

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Symbolic stat analysis to physical and mechanic parameters of loose earth in Chongqing reservoir TANG Fen,TANG Hong mei 2001, 20(3): 89-92.  Abstract ( )   PDF (131KB) ( )   On the basis of testing in Lab to loose earth in Chongqing reservoir,the authors present probability analysis of earth characteristics including physical and mechanic parameters,then propose and test the distributions of the characters.The results verify that interior friction angle φ obeys logarithm normal distribution while cohesion c,unit weight r and water ω obey normal distribution.Therefore,sensitive parameters testing in Lab are reliable. Related Articles | Metrics

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A study on flowing velocity in aqueduct of debris flow ZHOU Fu chun 1,CHEN Hong kai 1,LIU Li ping 2, GAO De hui 3 2001, 20(3): 93-96.  Abstract ( )   PDF (135KB) ( )   This paper inqures into the energy equation of debis flow in drainage canal, according to the law of coservation of energy.Mean current velocity of any transverse section of the debris flow of the aqueduct can be ascertained from this equation.and this paper also gives the course of inference of the equation,the formula of hydraulic raidius and energy loss of the debris flow in the process of flowing.Meanwhile this paper makes concrete analysis of all parameters? 玜\-1、a\-2、a\-3、ξ\-1、ξ\-2、n\-1、n\-2 ,especially first leades into a revised coefficient K contrast debris flow with water.Finally the theory is applied to the design of aqueduct of debris flow in pinchuan.K value( K =1 3) is obtained by a model experiment, and it is revised to 1 4 by inspection of the scene, then utilizing the equation,mean current velocity of the debis flow is reached in the exit transverse section of the equeduct. Related Articles | Metrics

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Study on the form law and the causes of formation in natural alluvial river meanders WANG Ping yi 1, LAN Feng 2 2001, 20(3): 97-101.  Abstract ( )   PDF (165KB) ( )   In this paper,the general natural conditions of formation meandering are analyzed,the main views are systematically investigated on the causes of formation in the alluvial river meanders,the general characteristics of processes and fine regulation line are given in the alluvial river meanders. Related Articles | Metrics

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Study on two-dimension resistance of mountain rivers WU Xiu guang,WANG Ping yi 2001, 20(3): 102-105.  Abstract ( )   PDF (161KB) ( )   Aiming at the difficulty of defining the resistance of horizontally two dimensional calculate of flow at present,on the basic of former work,through dealing with a great deal of the measured data of flow in mountain rivers,analysed horizontally two dimensional resistance and put forward the experience formula of the rough of horizontally two dimension calculate of flow of mountain rivers.And it can be applied in calculate of flow of mountain river. Related Articles | Metrics

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Counting on the maximum scouring water depth in river bend SHEN Bo 1,ZHEN Lan xiang 1,BEI Gang 2 2001, 20(3): 106-109.  Abstract ( )   PDF (145KB) ( )   Through analyzing flow and convex band sands being acted forces in river bend sands equational transportation,this paper has built the formula of rational maximum scouring water depth. Related Articles | Metrics

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The discussion on the rationalization of choosing the prot site for Fuzhon deepwater port CAO Yu kun 2001, 20(3): 110-114.  Abstract ( )   PDF (282KB) ( )   Based on the comparison and comprehensive analysis of the selected sites for deepwater port area of Fuzhou port in aspects of natural conditions,concentration and evacuation conditions of backland,relationships between port and city development,etc.,this paper puts forward a site selection scheme for constructing a cross century deepwater port area for Fuzhou port. Related Articles | Metrics

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The higher order nonlinear geometry formulae of plane strain state WU Heng li 2001, 20(3): 115-117.  Abstract ( )   PDF (107KB) ( )   Based on the reference [2] this paper continues the discussion of the higher order nonlinear geometry formulae of plane strain state as formulae (8) and (16) in text. Related Articles | Metrics

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Study on internet information research LI Xiao ling 2001, 20(3): 118-120.  Abstract ( )   PDF (95KB) ( )   In this paper,that the characteristics of the network information research,the functions of the main research tools,the main problems of the network research and the develop direction of the network research are studied. Related Articles | Metrics

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Problems in writing abstracts and key words of scientific papers WU Cheng ping 2001, 20(3): 121-124.  Abstract ( )   PDF (123KB) ( )   A few errors in writing abstracts and key words of scientific papers for the scientific and technical periodicals are pointed out.The importance and classification of the abstracts in research journal are discussed.The methods and requirements in writing abstracts and key words of scientific papers are proposed . Related Articles | Metrics