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15 September 2003, Volume 22 Issue 3 Previous Issue    Next Issue

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A diagnosis system of parameters of bridge state and its software ZENG De-rong，XIAO Sheng-xie 2003, 22(3): 1-6.  Abstract ( )   PDF (206KB) ( )   The state and safety of bridge is an important problem which is wished to solve , some efforts are given to solve it, and some achievements are obtained, but a system of evaluating the state and safety of bridge is not established, This paper presents the works and softwares which are finished by the authors in three years. References | Related Articles | Metrics

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Discussion of the reason and research method about hurt of concrete bridge surface WU Zu-lie，YI Zhi-jian，ZHAO Feng-jie 2003, 22(3): 7-9.  Abstract ( )   PDF (181KB) ( )   In this paper , the forms, reasons and the present dealing ways of disease in concrete bridge flooring , are at the same time , the lack of knowledge to the disease mechanism is pointed out , then the author proposes some unconcerned questions and his preliminary thoughts. References | Related Articles | Metrics

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The application of database in the constructional control of long bridge SHAN De-shan，LI Qiao，BU Yi-zhi，ZHAO Lei 2003, 22(3): 10-13.  Abstract ( )   PDF (175KB) ( )   In the constructional control of cable-stayed bridge,we apply the database to dispose and manage the testing data, and the homologous software is complied by using Visual C+ + based on the operation system Windows95/ 98, In order to make the software flexible and universal,the dynamic bind and ADO techniques are us during this software compiling. References | Related Articles | Metrics

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Non-linear stability analysis of tall piers with incipient defect HE Chang，XIANG Zhong-fu 2003, 22(3): 14-17.  Abstract ( )   PDF (171KB) ( )   Tall piers, with incipient defect, are regarded as investigative object.With the considerations of the effects of geometrical and material non-linearity, the tall piers are analyzed by non-linear stability analysis through / ANSYS0 . And the obtained results are compared to those by linear analysis. References | Related Articles | Metrics

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Review on current situation to study and trend of dangerous rock mass CHEN Hong-kai，WANG Rong，TANG Hong-mei 2003, 22(3): 18-22.  Abstract ( )   PDF (829KB) ( )   Dangerous rock is one of typical geologic disasters, generally locate at steep and high slope. Dangerous rock mass is rock mass divided by mutisetting structures. Collapse are from unstable and moving dangerous rock mass. On the basis of analysis to a great number of materials about dangerous rock studies, the authors classify these materials in to three parts, i. e. dangerous rock unstable model, stability calculate method and anchor calculate method in this paper. The three parts are analysed in detail in the paper . Based on these studies before the authors ap proach trend to research on dangerous rock in future. References | Related Articles | Metrics

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The study and treatment of crack about prestressed concrete hollow slab ZHENG Sheng-bao，ZHOU Zhi-xiang 2003, 22(3): 23-24.  Abstract ( )   PDF (127KB) ( )   The article analyzes the reason of occuring cracks after the tension of prestressed concrete hollow slab, its treatment, and presents two new models of calculating cracks. References | Related Articles | Metrics

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Application of cantalever rigid frame lookum in Tianshan highway disease YI Peng- ying，CHEN Hong-kai 2003, 22(3): 25-27.  Abstract ( )   PDF (473KB) ( )   The Three projects rigid frames lookum, cantalever rigid frame lookum and retaining wall are privided to father Tianshan in K617 section of North Tianshan highway diseases. Based on the especial rerrain and geology, this paper optimizes the advantages and disadvantages of the three projects and applies cantalever rigid frame. References | Related Articles | Metrics

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Design and construction technology of pavement about diatomite modified asphalt mixture XIONG Si-hua，FAN Cao-yuan 2003, 22(3): 28-32.  Abstract ( )   PDF (791KB) ( )   Diatomite a new type of material for modifying asphalt pavement, is applied on improving physical and mechanical performance of as phalt mixture, which is only in the stage of experiment and research in our country. The paper introduces the character of design and construction on pavement about diatomite modified asphalt mixture through testing in laboratory and observing before construction and summarizing construction technology on the spot. References | Related Articles | Metrics

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The analysis and prevention of reflective cracking in asphalt pavement of expreeway CHEN Gui- feng 2003, 22(3): 33-36.  Abstract ( )   PDF (146KB) ( )   The reflective cracking is one of the major damages of the asphalt overlay on old roads and sem-irigid pavement, which badly influence the performance of the pavement. In this paper, an analysis of the reflective cracking generation mechanism, including those caused by thermal shrinkage or loading fatigue,was carried out. Then its extending on latitude and longitude direction and its destruction are stated here on the basis of fracture mechanics. Finally, the paper launched out a few new procedures on how to prevent and cure the reflective cracking. References | Related Articles | Metrics

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Study on superpave bituminous mixture performance PENG Bo，CHEN Zhong-da，DAI Jing-liang 2003, 22(3): 37-39.  Abstract ( )   PDF (105KB) ( )   A series of test are carried out to analyze the characteristics of Marshall stability , high temperature rutting , low temperature crack resistance , water stability , freeze and cleave strength ratio , texture meter , fatigue resistance and skid resistance of bituminous mixtures and denseior to the others .Finally the results show that its life has been prolonged, of better social and economic value , and it is a kind of higher-performance bituminous mixture . References | Related Articles | Metrics

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Research on the performance of the AK、SMA、OGFC and SAC' s bituminous mixture ZHANG Yi-luo，ZHI Xi-lan 2003, 22(3): 40-43.  Abstract ( )   PDF (1149KB) ( )   This paper elected four kinds of skid resistance grades for example AK-16B、SMA-16、OGFC-16 and SAM-16 according as our counrr try skid resistance grade, systematically compare with their high temperature stability, cracking resistance at low temperature, fatigue resistance and water-stability, and their skid resistance performance and the penetrating-water character. It can be reference to application of resistance mix . References | Related Articles | Metrics

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Research of the computing methods of the theoretical maximum density of bituminous mixtures WEI Jin-cheng，WEI Mi 2003, 22(3): 44-48.  Abstract ( )   PDF (170KB) ( )   Through analyzing several different computing methods of the theoretical maximum density of bituminous mixtures, the practical measurement method was regarded as the best logical way. At the same time, which aggregate density should be adopted in the caluculating method was recommended and the fact that the effective volume method, which was put forward by the authors, is not onlg able to improve the efficiency of the practical measurement method in bituminous mixtures, design but also satisfies the Precision demand of the theoretical maximum density of bituminous mixtures, was proved by test. References | Related Articles | Metrics

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A study on measuring methods of asphalt mixture bulk density LIU Hong-ying 2003, 22(3): 49-51.  Abstract ( )   PDF (116KB) ( )   Asphalt mixture bulk density is an important indictor, which has great effect on compact density and mixture design of asphalt pavement. Based on density definition of asphalt mixture, The paper shows deeply different measuring density methods effect on mixture design and quality control of asphalt pavement.The results show that the application of wax-enveloped method to measure bulk density of asphalt mixture is a fit and reliable, but is needs to pay attention to the detailed requirement of wax-enveloped. References | Related Articles | Metrics

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Comparison of the test results by sand-cone method and nuclear density meter LIN Cheng-gong，ZHAO Ming-jie，WU De-lun 2003, 22(3): 52-55.  Abstract ( )   PDF (139KB) ( )   Compaction plays an important role in controlling quality of qarthfill works , especially with extensive area and considerable thickness of soils.The type of compaction equipment and the number of roller passes are the most important two factors, which influence the maximum dry density of compacted soils .Tests for inspecting of the quality of compacted soil can be conducted in the field and in the laboratory .are two common methods in determining the dry density of compacted soils in the field , and Standard or Modified proctor Test is in common in the laboratory .This papecr focuses mainly on comparison of the test resuts by the three methods mentioned above for a compacted embankment .The field densities are related to the number of roller passes as well as the amount of coarse particles;however , the test results from the Nuclear Density Meter do not show this relationship. References | Related Articles | Metrics

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A probe into design method of fly ash concrete propotion TIAN Wen-yu 2003, 22(3): 56-58.  Abstract ( )   PDF (668KB) ( )   This paper gives a brief account of the advantages and blending methods of fly ash concrete. Then it points out and analyses the mistakes in the escessive replacement method based on the national standards of GBJ146-90. At last, the paper proposes some remedial ideas on the above-mentioned method. References | Related Articles | Metrics

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The property of crack-resistance and waterproofing of steel-fibre concrete TANG Fen，XIE Yuan-guang，TANG De-lan 2003, 22(3): 59-62.  Abstract ( )   PDF (131KB) ( )   Steel-fibre is a kind of effective reinforced material manufactured easily and mixed by available equipment with wide source .The authors study the property of steel-fibre concrete according to the theory of fibre interval , the principle of power consumption and mixture .It has been proved that steel-fibre can improve the compressive strength , tensile strength and flexural strength of concrete very well, and improve its leak-resistance and waterproofing effectively References | Related Articles | Metrics

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Study on physica-l mechanical properties of QJ type soi-l solidified agent HUANG Wei-rong,LIU Da-chao，CHEN Wei 2003, 22(3): 63-67.  Abstract ( )   PDF (866KB) ( )   Strength and physica-l mechanical properties of grave-l soil fixed by QJ type soi-l solidified agent were studied. The results showed its superiority for embankment and basecourse at a certain extent. References | Related Articles | Metrics

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Study on variation management of project manager WANG Zu-zhi 2003, 22(3): 68-70.  Abstract ( )   PDF (149KB) ( )   This paper presented the connotations and types of variations and the procedure of variation management for civil engineering contract .Based on the analysis of the Project Manager’s work in variation management , some reasonable thoughts and methods were provided . References | Related Articles | Metrics

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The comparison between the new edition published by FIDIC in 1999 and the old one of conditions of contract for construction ZHANG Gui-feng，GENG Hong-bin 2003, 22(3): 71-73.  Abstract ( )   PDF (693KB) ( )   The paper investigates the properties of conditions of contract for construction which is the new edition published by FIDIC in 1999 and explores the different items from the old edition( published in 1987) by document contrast study which has practical significance in promot-ing the application of it. References | Related Articles | Metrics

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The study of traffic crashes of cheng-yu expressway in Chongqing area GAO Jian-ping 2003, 22(3): 74-77.  Abstract ( )   PDF (177KB) ( )   n recent years, road safety problem has become an important issue in expresswaysptransportation.With the aid of / before/ after study method, several characters have been found between traffic crashes and design factors of Chongqing section of Chengdu-Chongqing expressway. This study provides a theoretical basis for taking vehicle crash precaution and safety measures properly. References | Related Articles | Metrics

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Analysis of contribution and elasticity of investment in highway construction to economic increasement ZHU Shun-ying，WANG Hong，LIU Wei，ZHANG Jian-xu，PAN Yan-rong 2003, 22(3): 78-81.  Abstract ( )   PDF (943KB) ( )   The four new models, separately production function model, logarithm linearity model, linearity-logarithm model and mixed model including linearity and logar ithm, which are used in analysis of contribution and elasticity of investment in highway construction to economic increasement, are discussed in detail and formulated. From 1980 to 1999, Chinese contribution and elasticity of investment in highway construction to economic increasement are analyzed, and come out the conclusion that investment in highway construction may gain more economic increasing than the investment in other fields. References | Related Articles | Metrics

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The sustainable development of modern highway construction in west China MA Chun-yan，WANG Jun-li 2003, 22(3): 82-85.  Abstract ( )   PDF (411KB) ( )   This paper analyses the highway construction from the point of view of society, economic, human being and environment in West China.We Put forwards the sustainable development principles and countermeasures, by which proceeding modern highway transport system. References | Related Articles | Metrics

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The new development trend of city logistic distribution in our country LIU Wei-hua，LIU Wen-hua，LIU Song-tao 2003, 22(3): 86-89.  Abstract ( )   PDF (440KB) ( )   In this paper, the development of present condition and trends of city logistic distribution in our country are analyzed and three big hot points in the new period are bronght up, respectively are common distribution, community distribution and green distribution. Then it analyzes the origin of new trend. At last, some development suggestions of the new trends in city logistic distribution are made. References | Related Articles | Metrics

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The analysis of logistics serving demands in industry corporations after joining the WTO TANG Xing-li，XIAO-Hong 2003, 22(3): 90-92.  Abstract ( )   PDF (102KB) ( )   After joining the WTO, the competition of Logistics is more severer .Modern industry corporation not only need the simple Logistical services , such as transportation or storage , but also require some advanced serving , like the whole management and information serving of goods transporting .But at present, the supply of Logistical services have not satisfied the requires of demands, for the scarcities of capital and experts. This paper suggests several advices settling the contradiction between the supply and the demands. References | Related Articles | Metrics

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The survery supervision main way of highway engineering LIAO Jiang-ping 2003, 22(3): 93-94.  Abstract ( )   PDF (98KB) ( )   Based on the survery and engineering practice in recent years, the authors summarize the main 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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Research on probability of landslide occurrence of dingzhuang industry area in fengdu TANG Fen 2003, 22(3): 95-97.  Abstract ( )   PDF (104KB) ( )   In this paper , based on Analy sis on mechanism of Dingzhuang industry area Landslides and the author , s practical experiences, the four factors of landslides occurrence are presented, which are intrinsic factor , drop in water level of reservoir , torrential and earthquake .The measurement targets and criterion are presented.occurrence probability of Dingzhuang industry area Landslides is analyzed by probability statistics and the conclusion is similar to the fact . References | Related Articles | Metrics

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A User- oriented approach for deriving the relation between activities LIU Wei-jun，XU Meng 2003, 22(3): 98-100.  Abstract ( )   PDF (117KB) ( )   It is difficulty for users to get the right relation between activities. In this paper, one approach for deriving the relation between activities is presented. By the approach, the relation between activities is distilled from the relative relation between activities. References | Related Articles | Metrics

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The model with stochastic user equilibrium assignment for elastic demand and the solving algorithm LUO Wen-chang，YUAN Chun-hua 2003, 22(3): 101-103.  Abstract ( )   PDF (139KB) ( )   In this paper we studied the model with stochastic user equilibrium assignment for elastic demand, gave some related proof and designed the solving algorithm .A simple example was given to conduct programming computation.The effect of the parameters on the result of the computation is pointed out.Finally , the direction of further study is indicated. References | Related Articles | Metrics

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The research and application of nanocomposites ZHONG Li，HAN Xi 2003, 22(3): 104-107.  Abstract ( )   PDF (397KB) ( )   The research and application of nanocomposites are reviewed, the processing and development of nano-particle are briefly summarized, the preparation and research development of the mineral and polymer carr ier nanocomposites are chiefly introduced, the characteristic and application situation of several widely used nanocomposites are discussed in this paper. References | Related Articles | Metrics

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Study on faults of electronic-control injection petrol engine based on fault tree knowledge FU Xiao-lin 2003, 22(3): 108-110.  Abstract ( )   PDF (106KB) ( )   Fault tree is a kind of graph in which the events have reverse logic relationship.In this paper, a FTA model of gasoline faults is set up. The different combinatorial pattern of the events that can cause electronic-control injection petrol engine faults and probability of the faults are confirmed ,which will lead a feasible way of further research on a practical fault diagnosis expert system. References | Related Articles | Metrics

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The study of spure- dikes protection for subgrade river side TIAN Wei- ping，LI Hui- ping，WU Yan 2003, 22(3): 111-115.  Abstract ( )   PDF (176KB) ( )   Spur-dike is a common structure for scour protection of subgrade river side, and spur-dikes are applied usually.The length and separate distance of spur-dikes are important design parameters. The flow pattern and scour law around spur-dikes in the straight and bend channel are studied based on theory analysis and model test, put forward the method to arrange spur-dikes controlled by protection region and scour depth, point out that the 1# spur-dike which is shorter and of half length of others is suitable, and others are same in length. In bend chnnel, the separate distance of spur-dikes should be shorter due to flow pattern and scour law are more complicated, but the method for the straight channel can be consulted to determine separate distance of spur-dikes.The difference between river and model channel are already considered in the method. References | Related Articles | Metrics

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Analysis of fluvial processes in Chongqing region of the Yangtze River YANG Yun-yun，FU Hua 2003, 22(3): 116-119.  Abstract ( )   PDF (194KB) ( )   In this paper , it analyses the changqing of the runway , in Chongqing region of the Yangtae River and the entrance of Jialing River to the Yangtze River , in the end of the flood season. References | Related Articles | Metrics

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Study on the flow conditions at the entrance area of shiplock approach channel in hydro- power station HUANG Bi- shan，ZHANG Xu- jin，SHU Rong-long，CHENG Gui- fu 2003, 22(3): 120-124.  Abstract ( )   PDF (198KB) ( )   This paper states navigation flow conditions at the entrance area of shiplock approach channel in Xinzheng hydro-power station in jia-ling river, studies the influence of the structure type and layout of approach wall inflnce on navigation flow condition at the entrance area, and puts forward some measures for improving navigation flow conditions at the entrance area. References | Related Articles | Metrics

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The analysis of course stability and the turning quality about the skimming boat LIU Yuan-feng，TANG Xing-li 2003, 22(3): 125-127.  Abstract ( )   PDF (127KB) ( )   According to the construction of the skimming boat and the feature of its course, this paper briefly analyses and discusses the course stability and turning quality to the skimming boat. The safety of the skimming boat can be completed and the captain can handle the ship safely on this theoretical basis. References | Related Articles | Metrics