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22 April 2000, Volume 19 Issue 2 Previous Issue    Next Issue

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Discussing on interchange aesthetics——Beautification and attire of interchange WU Guo-xiong, SUN Jia-si 2000, 19(2): 1-5.  Abstract ( )   PDF (389KB) ( )   First, this paper expounds the relations between interchange aesthetics and beautification and the relations between interchange aesthetics and attire, and then according to examples, it analyses the content, the rule and the demand of beautification from afforestation, illumination and a short piece for bulding which are classified as interchange beautification, and those of attire from alignment, color and pattern which are classified as interchange attire. The aim is to create a good design which meets function and surroundings of of interchange, and to serve operation of traffic and environment. Related Articles | Metrics

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Two problems in design and calculation of higher bridge piers CHENG Xiang-yun 2000, 19(2): 6-10.  Abstract ( )   PDF (408KB) ( )   Based on the principle of minimum potential and using Rayleigh-Ritz method, the geometric non-linear analysis of higher bridge piers wes solved in this paper. The new concept of equivalent horizontal force proposed by the author may be easily to calculate the second effect, which wes produced due to the vertical forces and resisted by the piers and rubber pad bearings incorporately. The simple formula in this paper are applicable to calculate by hand, understood clearly without computation of successive iteration, higher precision and graspable easily for the disigner. Therefore it has the practical significance. Related Articles | Metrics

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Current situation of anti-corrosion for cables of cable-stayed bridges YI Sheng-tao 2000, 19(2): 11-14,26.  Abstract ( )   PDF (440KB) ( )   This paper describes the current situation and developmental trend of anti-corrosion for cables of cablestayed bridges of han and abroad. Learning and using the new technology of other countries for reference are for the purpose of promoting further development of technology for cable-stayed bridges of our country. Related Articles | Metrics

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Study of statistical law on over-under-excavated values of highway tunnel SHE Jian, ZHONG Xin-qiao 2000, 19(2): 15-20.  Abstract ( )   PDF (389KB) ( )   In ordr to provide the reasonable parameters in the reliability analysis of tunnel structure and the criterion in the quality control of tunnel engineering, in this paper, the over-under-excavated values of the real-state outline of tunnl excavation are obtained by the nera-field photographic method. By using mathematical statistic method, the figure features and probability distributions of the over-under-excavated values of the surrounding rock,including deferent positions of same cross section, are analyzed. Related Articles | Metrics

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A general survey and development terdery of planning theories on highway network LI Shu-qing, TANG Re-qing 2000, 19(2): 21-26.  Abstract ( )   PDF (556KB) ( )   In this paper, the development progress, working program and main content of the highway network planning theory at home and abroad are elaborated. Moreover, the planning theories and methods on forecasting, distributing and appraisal are comparatively analysed. Finally, the development tendency is offered. Related Articles | Metrics

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An brief introduction of arch bridge modeling and motional image creation CHEN Zheng-bing, WU Guo-shong, ZHOU Kai-fa 2000, 19(2): 27-31.  Abstract ( )   PDF (382KB) ( )   Taking a practical arch bridge design scheme as an example, this paper introduces the application of 3 dimensional modeling approaches of 3DS. MAX to the exhibition of the bridges spatial structure and the creation of its motion image so as to completely computerize the production of bridges static and motional images. Related Articles | Metrics

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The design and control of wind cable in cable erecting tower frame HAO Xian-wu, BAI Qng-xia 2000, 19(2): 32-34.  Abstract ( )   PDF (215KB) ( )   According to the charcteristics of cable and the varing of the top dislacement of the fixed tower frame,the paper puts forward the method of design and construction control of tower frame's wind cable, which regards the permitted top displacement of the tower as the control aim. Related Articles | Metrics

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Advancement in large-span suspension bridge construction technique LUO Na, LIU Jian-xin 2000, 19(2): 35-38,49.  Abstract ( )   PDF (452KB) ( )   This Paper sums up technical foundation and advancement of large-span bridge construction with an example of the large bridge over Akasi Channel in Japan. Related Articles | Metrics

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Application of numbers pile up in neural network——Varies resources balance of neurol network WANG Shou-xu, WANG Zu-zhi 2000, 19(2): 39-43.  Abstract ( )   PDF (375KB) ( )   If time limit for construction restricted or shorted too much, under control of neurol network, varies resources (labor, materials, machines) which play decisive actions in construction apply balance and the optimum scheme, or not, can influence directly the cost of project by use numbers pile up. This paper evaluates the optimum scheme by using the neurol network optimum model which composes time,varies resources and cost in one function. Related Articles | Metrics

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The application of machine-processed sands to pouring C50 in the construction of box grider of the superstructure of Huanghuayuan bridge TANG Liang, QU Guang-yi 2000, 19(2): 44-49.  Abstract ( )   PDF (430KB) ( )   To compound C50 in the constructiion of box-girder of the superstructure of Huanghuayuan bridge, medium sands made in Jianyuang are rreplaced by composite mortars made up of machine-processed sands and sands made in Quhe. The practical application and the analysis of experimental data sow that working behavior and mechanics performance of the composite mortars are basically similar to that of concrete compounded by the medium sands made in Jianyang. Besides, the application of the composite mortars has attained remarkable economic benefits. Thereby, the development, spread and application of this kind of technology in city of Chongqing will be certain to bring about tremendously great economic benefits. Related Articles | Metrics

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Study on zero geometrical tolerance in automobile spares precision design CAO Yuan-wen 2000, 19(2): 50-52,63.  Abstract ( )   PDF (286KB) ( )   Zero geometrical tolerance were discussed with instances. Some problems difficult to understand of application zero geometrical under distinct circumstances were analysed and compared. In order to be used flexibly and rationally in automobile spares precision design. Related Articles | Metrics

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Construction technology of pile-plank wall FENG Yue-long, PU Xiao-wei 2000, 19(2): 53-55.  Abstract ( )   PDF (251KB) ( )   In ths paper, the writers take the pile-plank wall applied in the railway from Maga to Putaoqin, a feeder railway to Neijiang-Kumin railway line, as an example to introduce the structrue, the construction technology, the method of construction and the writers experience in construction. This research provides reference for the projects of the same kind. Related Articles | Metrics

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The preliminary research on navigable conditions and regulation measurements of Longwangtuo reach in Three Gorges reservoir district ZHANG Xu-jing, MU De-wei, YANG Yun-yun 2000, 19(2): 56-63.  Abstract ( )   PDF (649KB) ( )   Longwangtuo, lying in the reach of Fuling central harbour area, is known as one of the navigation-hampering shoals. This paper analyses the changes of the sediment despite and navigable new conditions in various run times of Three Gorges reservoir in Longwangtuo reach, resulted from the achievements of the hydraulic model experiments in Fuling reach. On basis of this, it puts forward to the river regulation measurements and the preliminary scheme of the regulation engineering, which presents the fundamental proof for the regulation engineering design of Longwangtuo navigation-hampering shoal at the next step. Related Articles | Metrics

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Study on the waterway condition near Xiluodu hydropower project in Jinshajiang River DENG Yu-Zhong 2000, 19(2): 64-66,70.  Abstract ( )   PDF (335KB) ( )   This paper introduces the current situations of the river rapids, based on the river current situation investigation of the back water varying sectiion of Xiluodu Reservoir and the section from Xiluodu dam to downstream Shuifu and collection and analysis of information. According to planning Ⅲ Grade channel standard, the regulation and the investment on the river course are studied. The significan reference is presented for the decision of Xiluodu hydropower project up-downstream sailing problem. Related Articles | Metrics

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Study on the technology of heating asphalt by heavy burning oil ZHANG Li-hua 2000, 19(2): 67-70.  Abstract ( )   PDF (320KB) ( )   Being the main road surface material, asphalt require to be heated during its production,store and utilization. It has been devoloping a new technology to heat asphalt by heavy burning oil. This method require less equipments to produce high thermal efficiency, and it can save energy, and reduce enviromental pollution. The paper will discuss the technology of heating asphalt by heavy burning oil, focusing on its heating mechanism, processing and the factors to be attention. Related Articles | Metrics

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Discussing gravity stiffness of suspension bridge XU Jun-lan, XIANG Zhong-fu 2000, 19(2): 71-74.  Abstract ( )   PDF (280KB) ( )   With the increasing of suspension bridge's span, the gravity stiffness of suspension cable itself is more important than vertical deflection resistance stiffness of stiffening girder which is serviced for the whole structure. In order to provide more knowledge of gravity stiffness of suspension cable, in this paper, gravity stiffness of suspension cable is formulated briefly and theoretically in case of ignoring the existing of the stiffening girder.The deformation and internal force of suspension cable can be calculated approximately in this way. Related Articles | Metrics

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Study on piezoelectric sensor array of stress sensory and its application in concrete structure monitoring XIE Dong, TUO You-kang 2000, 19(2): 75-78.  Abstract ( )   PDF (340KB) ( )   In this paper the authors discussed the sensing response of stress sensory piezoelectric sensor in mechanical properties of the practical structure. The monitoring method and technology that the passive piezolelectric sensor array embedded in concrete are presented. Related Articles | Metrics

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The present situation and prospect of the acoustic properties research in rock ZHAO Ming-jie, XU Rong 2000, 19(2): 79-85,98.  Abstract ( )   PDF (689KB) ( )   On the basis of extensive reference of literature, the present situation of the ultrasonic surveying technology and the advance of the acoustic properties research in rock engineering are summarized in detail in this paper. The authors opinion for the further studies is given in this paper. Related Articles | Metrics

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The study of bridge abutments circling flow and part scouring SHEN Bo 2000, 19(2): 86-89.  Abstract ( )   PDF (294KB) ( )   Through the theoretical liquid dynamics complex study to the bridge pier and abutment circling flow,this paper related with bridge abutment maximum clear water equilibrium scouring experiment s analyses has made out the bridge abutment's velocity circulation, maximum flow capacity per unit width, and the maximum part scouring depth counting method. Related Articles | Metrics

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Research on optimal anchorage direction of rock mass slope TANG Hong-mei, WENG Qi-neng 2000, 19(2): 90-93.  Abstract ( )   PDF (258KB) ( )   It is well known that anchorage of rock mass slope is an important research topic and content. In view of research aim that displacement along anchor direction is the biggest, and displacement equations of anchor rock mass are deduced in the paper beyond regarding rock mass as disperse medium. Solving these equations, we can identified optimal anchor direction. Optimal anchor direction can make our works on slopes anchorage from blindness and randomness. This method must paper to slope hamess. Related Articles | Metrics

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Analysis of influence of earthquake longitudinal wave on tower structure Xu Reng-sheng 2000, 19(2): 94-98.  Abstract ( )   PDF (320KB) ( )   The wave equation, continuous equation for tower structure and the method of characteristic line,are derived in this paper, and variation of structure modulus of elasticity with strain and vibration frequency being considered, state of stress on the structure affected by earthquake wave is analyzed. Related Articles | Metrics

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An analysis to water consumption determination method in standard cement consisency SUN Zeng-zhi 2000, 19(2): 99-101.  Abstract ( )   PDF (258KB) ( )   This paper analyses some possible misunderstanding of certain items related to the water consumption determination method in standard cement consistency concerned with specification T0502-94 in JTJ053-94 in the practical prodcedure. Some effective proposals are also put forward for reference. Related Articles | Metrics

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Approach to avoid formation of air-filled cavity on surface of concrete works LUO Na, LUO Tao 2000, 19(2): 102-104.  Abstract ( )   PDF (268KB) ( )   In construction of large-scale high-class highway project to eliminate the surface bubbles that could form surface defect on concrete works is always a knotty problem for construction technician and supervising personnel.Focusing on this problem the possible reasons were analyzed and the corresponding solutios were given out in this paper. Related Articles | Metrics

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An analytical expression of stress concentration factor for a finite wide plate with an eccentrically placed circular hole HAN Yong, YI Zhi-jian, CHEN Yan 2000, 19(2): 105-107.  Abstract ( )   PDF (103KB) ( )   An approximate method has been used in this paper to calculate the stress conentration factor for a finito wide plate with a small circular hole under tension. The stress concentration factor has been obtaind analytically. Related Articles | Metrics

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Interpolation perturbation method for solving boundary layer type problems of second order ordinary differential eguations with variable coefficients YUAN Yi-wu, LI Yong-chun, XU Ji-jiang 2000, 19(2): 108-111.  Abstract ( )   PDF (280KB) ( )   In this paper, by using the interpolation perturbation method, the authors obtain the first order approximate solutions of the boundary layer type problems of the second order ordinary differential equations with variable coefficients. Since the method of this paper may be formularized (See Eq. (10)), the calculating process of this paper is quite simple and its accuracy its accuracy is even higher than that of the multiple scales method. Related Articles | Metrics

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Second-class sea-crossing leveling put into practice in Xiamen Haicang bridge XIE Yuan-guang, QIU Xu-fu, LIU Cheng-long 2000, 19(2): 112-114,120.  Abstract ( )   PDF (320KB) ( )   The paer introduces second-class sea-crossing leveling put into practice in Xiamen Haicang bridge. Related Articles | Metrics

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A statistic analysis on articles and references in a Journal of Chongqing Jiaotong Institute YUAN Ben-kui 2000, 19(2): 115-120.  Abstract ( )   PDF (483KB) ( )   Taking a statistic approach, this pape makes a careful study on articles and references in this Journal during past five yeare (1995-1999), under topics such as age, sex, title of professional post of authors, distribution of authors and deciplines, publishing periods, numbers and type and the publishing year of references as well. Finally, this paper raises some relevant problems and points out the direction for future development. Related Articles | Metrics