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15 March 2003, Volume 22 Issue 1 Previous Issue    Next Issue

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Research on the experimental rock mechanics of rockburst under unloading condition XU Lin-sheng 2003, 22(1): 1-4.  Abstract ( )   PDF (776KB) ( )   As one of the geological hazards, rockburst is often met in underground engineering under excavation unloading conditions of high geostress areas. According to the actual mechanics conditions, the triaxial test is designed to simulate the excavation of tunnel in this paper. The deformation-failure characters are elaborated. These results can play important roles in the mechanics mechanism of rockburst. References | Related Articles | Metrics

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Rock stability analysis method of close-parallel tunnels and application ZHANG Xing-lai，ZHONG Yun-jian 2003, 22(1): 5-8.  Abstract ( )   PDF (618KB) ( )   It has generally two ways for high-class highways, two-way railways, urban underground, and urban light track tunnels. In recent years, the application of close-parallel tunnels have increased rapidly because of the need of planning and plane design, the constraint of terrain, surface construction, hydrology, and geology, the expansion of existed transport facilities, and the improvement of land utilizing efficiency. For the great diversity of around-rocks pressure with different construction methods, we focus our discussion on hidden-burying tunnels by Mine method or NATM. The corresponding rock stability analysis method is introduced in this article, and its application in Light Track # 2 of Chongqing City is also provided. References | Related Articles | Metrics

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Applications of SFRC in pavement and bridge engineering YANG Cheng-zhong，YUAN -Hong，CHEN Yi-fei，FAN -Jun 2003, 22(1): 9-12.  Abstract ( )   PDF (139KB) ( )   Based on the relative experimental and constructional materials at home and abroad of steel fiber and Steel Fiber Reined Concrete , the properties are analyzed.The applications of Steel Fiber Reined Concrete in highway and bridge engineering are introduced comprehensively .Finally , the aspects about the design and construction of Steel Fiber Reined Concrete in highway and bridge engineering are also related systemically . References | Related Articles | Metrics

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The application of presplitting blasting technology in the cutting slope QIU Xian-de ，WANG Xin-fei ，YU Yong-qiang ，ZHANG Yong-wu ，DU Xiao-ping ，LIU Liang ，HE Yong-cai 2003, 22(1): 13-16.  Abstract ( )   PDF (150KB) ( )   According to many in situ experiments of presplittiny blasting , the paper has researched the application of the presplitting blasting technology in the cutting slope .According to the in situ experiments and geological conditions , great blasting effects were obtained .The paper has great directive significance to the excavation of cutting slopes and obvious social and economical benefits . References | Related Articles | Metrics

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An Analysis of settlement of single piles in cohesive soils XU-Fei，SHI Ming-lei 2003, 22(1): 17-21.  Abstract ( )   PDF (237KB) ( )   Based on the application study of large diameter bored piles(LDBPs)used in bridge engineering and utilizing the data of static loaded tests and pile shaft testing , one hybrid method of finite element analysis of rod structure coupling with load transfer approach for single piles settlement was established in the result from the analysis of the methodology of predicting settlement of single piles in a sy stematic way .One program SPSA1 written in Fortran had been realized triumphantly .In the methodology of predicting settlement of single piles hereinbefore , the non -linear behavior of the relationship of stress and strain in the interface between pile shaft and media surrounding it was described by the Trilinear Model , and the softening characteristic of the relationship had be taken into account due to modification of initial stress technique in FEM . The non linear behavior of pile shaft material exerting influence on the single piles settlement was discussed.The documentation gives guidance for future research and development of the design criterion for LDBPs. References | Related Articles | Metrics

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Analysis on the effect of heavy vehicles on asphalt pavements AI Zhang-fa，YAN Jun-qiu 2003, 22(1): 22-27.  Abstract ( )   PDF (605KB) ( )   In this paper, the effect of heavy vehicles on asphalt pavements with respect to deflection and stress of pavement structures was ana lyzed quantitatively by examples. The destructive impact of heavy vehicles on asphalt pavement structures was discussed, which is of practical significance for asphalt pavement traffic management and pavement structural design. References | Related Articles | Metrics

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The application of micro surfacing in expressway maintenance NI Fu-jian，XU Zhong -ning，ZHANG Wen-hao 2003, 22(1): 28-31.  Abstract ( )   PDF (539KB) ( )   The technique of slurry seal is a good method for pavement maintenance. With the rapid developmint of polymer modified asphalt emulsion, polymer modified slurry seal, i. e. Micro-Surfacing, appears correspondingly. Micro-Surfacing is widely applied to maintenance of expressway and proved to be a method of good cost performance abroad. But it is still at a starting stage in China today. To solve this problem, the application conditions, execution effectiveness and application prospect are comprehensively analyzed in this paper on the basis of laboratory evaluation, tentative execution and subsequent field detection of the road performance after traffic. References | Related Articles | Metrics

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Studies on high temperature stability of guss-asphalt used for steel deck paving CHEN Xian-hua ，HUANG Wei ，LI Hong-tao 2003, 22(1): 32-35.  Abstract ( )   PDF (144KB) ( )   Guss -asphalt mixture is a dense gra ded mixture , when paving at steel deck, attentions should be given to its stability at high temperature .Many factors influent guss -asphalts high temperature stability .Through Marshall test, high temperature rut test and dynamic shear test, some factors about material composition such as asphalt content, the ratio of coarse and fine aggregate , ratio of miner filler and asphalt are discussed, factor about structure such as the height of test sample is also discussed at the paper .Several measurements are proposed to improve the mixtures high temperature stability . References | Related Articles | Metrics

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Research on marshall testing result of bitumen mixture's Surface drilling core sampling ZHANG Yi-lou，ZHENG Nan-xiang，ZHANG Jin-long，LU Jun-peng 2003, 22(1): 36-40.  Abstract ( )   PDF (705KB) ( )   Marshall testing of bitumen mixtures surface drilling core sampling is a method that judges the quality of bitumen mixture, but there is no standard. In the paper , mass of drilling core testing results, and making use of statistical analytic methods, we analyse systemically the drilling cores Marshall testing result of limestones asphalt concert, and study the fluency testing results on the performance parameters of the asphalt concert. It presents the method of judg ing the quality of bitumen mixture, and explains Marshall testing result of bitumen mixtures sur face drilling core sampling . References | Related Articles | Metrics

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Optimal resources disposition of the Mechanized asphalt concrete pavement construction system(I))——Static optimal disposition of the system LU Y-i zhao，GUO Xiao-hong 2003, 22(1): 41-44.  Abstract ( )   PDF (170KB) ( )   This paper discusses the relation of traffic intensity , member-amount and construction-cost of the “ mixing-paving” system that is one part of the mechanized asphalt concrete pavement construction system by applying Queuing Theory. In the mean time, it puts forward the method to solve the mathematical model easlly by using the computer. References | Related Articles | Metrics

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Appliedte technology for SBS modified asphalt waterproof layer LIU Zhao-hui，LI Yu-zhi，QIN Ren-jie 2003, 22(1): 45-48.  Abstract ( )   PDF (460KB) ( )   In this paper, characteristic and cost of different waterproof layer in asphalt pavement are compared. The characteristic, applied technology, construction technology and applied status of SBS modified asphalt waterproof layer in China is discussed. The study shows that SBS modified asphalt waterproof layer is a waterproof layer with fine performance and appropriate cost. References | Related Articles | Metrics

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The design of surface drainage of bituminous concrete pavement in expressway XIE Hong-xin，WANG Bin，CHEN 　Zhi 2003, 22(1): 49-52.  Abstract ( )   PDF (138KB) ( )   This paper analyses that expressway bituminous concrete pavement both built and being built are often damaged by water .Moreover the calculation theory , design principles , blueprint and its advantages and shortcomings of surface drain of pavement are also expatiated in this paper . References | Related Articles | Metrics

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Study on property of temperature contraction coefficient of lean concrete for roadbase XU Jiang-ping，MA Jian，JIN Lei，WANG Bing-gang 2003, 22(1): 53-55.  Abstract ( )   PDF (128KB) ( )   Temperature contraction coefficient is a parameter for material expansion and contract property when temperature becomes high ot low. Through the test in lab, the temperature contraction coefficient of lean concrete is studied and analyzed by the paper. The testing results are important parameters for calculation of temperature stress of lean concrete road base. References | Related Articles | Metrics

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Research on composite anti-slide structure with nail and anchor in project YUAN Jian-yi，CHEN Hong-kai 2003, 22(1): 56-59.  Abstract ( )   PDF (140KB) ( )   The anti-slope structure with nail and anchor is a new and an effective technique dealing with landslides .It is composed of prestressed anchor , nail and concrete grid beam, and it can make incompact soil to be a semi -rigidity mass, so as to increase the mechanics parameter of landslide .The prestressed anchor is anchored in rock, making whole structure to stand against soil press of upside and other load.The authors expound the function mechanism of the new structure in this paper , and take some applications as cases in the paper .It provides reference to similar engineering practices. References | Related Articles | Metrics

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Laboratory research abroad on the additives to improve the characteristics of the asphalt mixtures WU Shao-bo ，WANG 　Jiang，WEI 　Hong ，ZHANG Hai-long ，PAN Zhi-ke 2003, 22(1): 60-62.  Abstract ( )   PDF (142KB) ( )   Based on the early strength and water resistance of mixtures stabilized with bitumen emulsion, this paper introduced the abroad laboratory strength and other index of the mixtures stabilized by the ordinary Portland cement and another additives which indicates the ordinary Portland cement can significantly improve the early strength and water resistance References | Related Articles | Metrics

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The analysis for filled subgrade works inhomogeneous settlement and the disposal measures YAN Chun 2003, 22(1): 63-68.  Abstract ( )   PDF (612KB) ( )   Based on the simple analysis on the cause of the inhomogeneous settlement on the filled subgrade of highway , the article concludes the corresponding disposal measures and methods to protect from the settlement. References | Related Articles | Metrics

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The key problems and methods of construction on reservoir regions fill embankment HE Ren，ZHAO We-i xin 2003, 22(1): 69-72.  Abstract ( )   PDF (558KB) ( )   The purpose of this paper is to resolve the methods of construction of embankment of reservoir regions. Some key problems were discussed in this paper . Then we introduced the methods how to contro the monolithic stability and the uneven settlement. These practices we have performed showed that these methods were effectual. References | Related Articles | Metrics

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Dynamic multi-class loading problem ZHOU Xi -zhao 2003, 22(1): 73-75.  Abstract ( )   PDF (554KB) ( )   The dynamic network loading problem consists of determining on a congested network, time-dependent arc volumes, together with arc and path travel times, given the time varying path flow departure rates over a finite time horizon. The objective of this paper is to present the formulation of an analytical dynamic network loading model. The model does not require the assumption of the FIFO condition. The existence of a solution to the model is shown. References | Related Articles | Metrics

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The ARIMA model used in forecasting of traffic volume in short interval on the link ZHU Shun-ying，WANG Hong，LI Guan-shou 2003, 22(1): 76-77.  Abstract ( )   PDF (135KB) ( )   The basic model and methods for its parameters estimating, forecasitng of The ARIMA model which is used in forecasting of traffic volume in short interval on the link are discussed in detai, and then this paper analyses its applications in forecasting volume of tunnel on freeway. References | Related Articles | Metrics

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Systems study on traffic engineering overall plan of expressway netowork WANG Jian-jun，YAN Bao-jie，CHEN Kuan-min 2003, 22(1): 78-82.  Abstract ( )   PDF (167KB) ( )   On the basis of summarizing and analyzing traffic engineering overall plan reports of some provincial expressway network, this paper systematically studied main contents of traffic engineering overall plan of expressway network, and proposed some views References | Related Articles | Metrics

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Influence of the management of highway engineering cost after acceding to the WTO SHAO Hong，CHU Bin-qian，SHEN Qi-ming 2003, 22(1): 83-86.  Abstract ( )   PDF (616KB) ( )   This paper, discussas the influence and the deve-lopment tendency to highway engineering cost management. References | Related Articles | Metrics

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A grey sequence prediction model on road traffic count MAO Da-de 2003, 22(1): 87-89.  Abstract ( )   PDF (439KB) ( )   A grey prediction model on road traffic count is established by an example. The prediction precision is analyzed. The precision is higher and the compute is simpler than other ways. References | Related Articles | Metrics

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Consummating cost duty system around strengthening the bided budget WANG Xiao-kun，WU Xiaog-guang，LEI Min-zheng 2003, 22(1): 90-95.  Abstract ( )   PDF (184KB) ( )   Through the embedded analysis to the background of grandness policy and the actuality of construction corporation cost managing work in Chian , by introducing the theory and method of modern management , and taking present situation into account, this article puts forward the emphasis and working flow to construction corporation about strengthening the bided budget work and the cost duty sysytem .It has established and consummated a series of scientific and perfect cost duty stystem .If this system is carried out , the economic benefit of corporation will be enhanced notably . References | Related Articles | Metrics

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Study on objective cost control CHEN Yi -jun，GUO Yao-huang 2003, 22(1): 96-99.  Abstract ( )   PDF (151KB) ( )   The guarantee system for objective cost control is attempted to construct in this paper. The objective cost is determined by applying the objective method, a model of cost structure established accordingly and the objective programming is put to use in objective cost control References | Related Articles | Metrics

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Study on the heavy cargo wharf for xiluodu hydropower station in jinshajiang DENG Yu-zhong ，ZHANG Xu-jing ，Du Zhong-wei 2003, 22(1): 100-104.  Abstract ( )   PDF (188KB) ( )   According to the transporting need of the heavy cargo for Xiluodu hydropower station in Jinshajiang River, the following questions on the heavy cargo special wharf in Shuifu port are studied, such as thewaterway condition, site selection, load and unload technology , plane layout and hydraulic struture and so on.Because of the gentle bank slope , the larger range of the water level change and water sideline wing at the wharf , the floating crane handling technology and the sloping quay are adopted, the load and unload problem of the water -land transfer of the heavy cargo is solved.It can be refered to the similar wharf project . References | Related Articles | Metrics

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The in fluence of Three Georges Project running on sediment deposition at Wujiang Entrance MIAO Ji-lun，MU De-wei，ZHANG Xu-jing，DU Zong-wei 2003, 22(1): 105-108.  Abstract ( )   PDF (158KB) ( )   The model test methods on Wujang river entrance are introduced , the sediment deposition and river evol ement on 156m, 175m(first 30years)scheme during running of Three Georges Project are analyzed .The entrance bar formation process and the influence on ships are studied. The improved measures on navigable condition are put forward also References | Related Articles | Metrics

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Analysis on necessity of Luxikou waterway regulation of Yangtze River ZHAO Zh-i zhou，XIANG Jian 2003, 22(1): 109-112.  Abstract ( )   PDF (150KB) ( )   Luxikou River is one of shallw waterways of middle reach of Yangtze. Navigational channal changes with the fluvial process of river. In the meanwhile, the shoals exist at the entrance of Zhigan, and Zhonggang branch. It is difficult to maintain the waterway. The depth of waterway be kept upon 3. 2 meters, and the carrying capacity of tank barge must be decreased to pass through. For the demands of constructing the main channel of Yangtze River, the measements References | Related Articles | Metrics

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Reasonable discussion of automobile dynamics, economics mathematics model WEN Xiao-xia，DU Z-i xue 2003, 22(1): 113-115.  Abstract ( )   PDF (715KB) ( )   In practical application course, automobile sometimes works in no reliability status. The article associates the automobile practice status, from automobile basic theory, to take into account deeply automobile evanescence characteristic in practical use, and discusses reasonableness of automobile dynamics, economics mathematics model. References | Related Articles | Metrics

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Imagination to vehicle intelligent system on safe travelling LI Shu-qing 2003, 22(1): 116-120.  Abstract ( )   PDF (173KB) ( )   According to the situation that vehicle unsafe travelling has caused many accidents on roads, this paper has made an imagination to vehicle intelligent system on safe travelling, with the help of the concept-Intelligent Traffic System and the theory-Traffic Human Machine System, in order to make an intelligent warning and control on vehicle speeding , stability, following, passing, and so on. References | Related Articles | Metrics

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Discussion on the service quality evaluation methods of full-automatic Garage DENG Xin-dong，WANG Bo 2003, 22(1): 121-124.  Abstract ( )   PDF (161KB) ( )   Based on the analysis of the full-automatic garageps operation rule, a new method is brought up in this article to calculate the evaluation indexes of PPR( Part-Priority System) stochastic service system. And other queuing models are also compared. References | Related Articles | Metrics

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Study on the compatibility between two detergents of engine oil with neural network MA Lin-cai 2003, 22(1): 125-127.  Abstract ( )   PDF (110KB) ( )   The interaction among detergents is very complex , and is difficult to be described in a mathematic model.The Neural Network is applied to process the data from the experiment.Based on the magic extended ability of the Neural Network, the optimized rate of the two detergents is calculated.This rate tallies with the one concluded in the former article References | Related Articles | Metrics

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The hidden troubles and preventions of safety of compressed natural gas equipment in automobile ZENG Hong-da，CHEN Tong-jie，XU Wen-hu 2003, 22(1): 128-130.  Abstract ( )   PDF (121KB) ( )   Natural gas automobiles have great economic benefit and environmental protection benefit. Because natural gas is in high pressure, it is in danger. The reasons of hidden troubles are analyzed in the high pressure gas spray of mouth of a bottle explosion, the drop of bottle hanging install, the leak of gas pipe and connection, the lose efficacy of the function of decompressing valve sealing, and so on. The prevention methods are put forward each reason respectively. References | Related Articles | Metrics

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Summary of environmental protection of communication industry in china ZHOU Fu-chun 2003, 22(1): 131-134.  Abstract ( )   PDF (131KB) ( )   Firstly introduction to environmental protection in China is simply then based on the characterictics of communication industry, the history of environmental protection of communication industry is reviewed, the present situation of environmental protection of communication industry is analysed, especially the good results and problemes. Finally the future of environmental protection of communication industry is prospected. References | Related Articles | Metrics