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15 September 1994, Volume 13 Issue 3 Previous Issue    Next Issue

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Design and Construction of Shangqiao Interchange Project in Chongqing Qu Guongyi 1994, 13(3): 1-9.  Abstract ( )   PDF (480KB) ( )   In this paper,analyses and summarys for the design and consfruefion of large inferchanse have been given,and thetheory used to calculate wide-curved plefe bridgc and spoially-shaped plafc bridgc hao been sfuelied aed then a simp li-fied calculation methed References | Related Articles | Metrics

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Settling Behavior of Cohesive Sediment in Changjiang Estuary Zhou Huajun,Ren Rushu 1994, 13(3): 10-16.  Abstract ( )   PDF (366KB) ( )   The effective setling veloeity in Changjiang estuary is determined by matching the analytical model of vertical con-centration profiles to measured profiles.Detailed analyses for the validity of the method are made.It is shown that the effective settling References | Related Articles | Metrics

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The Study on Microstructure Behavior of Hydration Shell in Cement Pastes Gong Shanglong 1994, 13(3): 17-23.  Abstract ( )   PDF (485KB) ( )   This artiele introduees the hydration shells in cement pastes based on some mierophotographes taken by a scanning Electronic Mieroscope.The behavior and variation of the shells at different water-cement rations and different ages are deseribed.some reason References | Related Articles | Metrics

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One of the Curve-type Methods for Desiguing of Horizontal Alignment of Interchanges by Computer─Building-blocks Wu Guoxiong,Ren Changji,Li Fang 1994, 13(3): 24-31.  Abstract ( )   PDF (364KB) ( )   The building-block method is one of the curve-type designing methods based on alignment unit.When designing in-terchange ailgnment one canlay out the next unit if the information of the pre-existing unit such as coordinates,tangentazimuth and curature rad References | Related Articles | Metrics

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A Mathematical Model of Road Margin-Line and its Application Shi Yi,Wang Guoqiang,Zhu Zhaohong 1994, 13(3): 32-41.  Abstract ( )   PDF (462KB) ( )   By extending" the sense of the offset curve",this paper presents a mathematical model of road margin-line as wellas the centre-line and analyas the geometric proporties of the model(such as slope,curvature and the length Of curve)on the widened curve.This References | Related Articles | Metrics

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On Widening of Plane Curve of Spline Function Yang Shaowei,Zhang Naicang 1994, 13(3): 42-47.  Abstract ( )   PDF (262KB) ( )   Compared with traditional highway plane geometry,the improved spline curve has Charactertics Of reasonable ness,conformity with the traval tracc on curve and adaption to the loweraphry and speed variation.It is thcrefore a newmethod for geometric dcsign.w References | Related Articles | Metrics

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Causes and Prevention of Eearly-cracking of Bituminous Pavement in Desert High way Chen Zhongda,Dou Mingjian 1994, 13(3): 48-52.  Abstract ( )   PDF (316KB) ( )   Based on the eharacteristics of desert highway, the types of pavement structure, the conditions of construction, thecrack patterns and rcsults measured in deflection,the causcs of early-cracking of bituminous pavement in the section ofK2-K32 are analyzed References | Related Articles | Metrics

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Causes and Preventive Measures of Early-cracking on Cement Concret Pavement Xie Danhua,Lei Jianmin 1994, 13(3): 53-56.  Abstract ( )   PDF (253KB) ( )   The eauses of early-cracking have been analysed in this paper by investigationg the construetion conditions of a ce-ment eonerete pavement, some preventive measgures of early-cracking are proposed and they can serve the improvemtntof construction quality References | Related Articles | Metrics

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Analysis of Curved Thin-Walled-Box Girders by Reissner’s Principle Yuan Jianbing,Du Guohua 1994, 13(3): 57-65.  Abstract ( )   PDF (384KB) ( )   In consideration of the shear effect of warping,this paper dcrives the stiffness matrix and the load matrix of acurved element using Reissner’s principle.The relcvant programming is also presented. References | Related Articles | Metrics

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Bed Forms and Flucial Process of Shoal Bars Cheng Changhua 1994, 13(3): 66-74.  Abstract ( )   PDF (480KB) ( )   Based on the model test and the field-data analysis of pool-riffle seqnences in meandering streams, the charaeteristicsof bed-forms and mechanism of shoal bars have been imestigated and discussed in the paper. The results of thses stud-ies show dirrerent References | Related Articles | Metrics

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Characterisics of Scour-deposition around Hooked Spur-dike Cheng Changhua,Liu Jianxin 1994, 13(3): 75-82.  Abstract ( )   PDF (428KB) ( )   A moveable-bed model exporiment is introduced in this paper to study the characteristics of scour-deposition aroundthe booked spur-dike.The results show:(1) the vortex intensity near spur-dike is weakened wity the increase of D/L(ratio of hooked-length to References | Related Articles | Metrics

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Analysis of Secondary Currents of Outer Bank Erosion in Channel Bends Wang Pingyi 1994, 13(3): 83-88.  Abstract ( )   PDF (316KB) ( )   In this paper,the influence of channel gcomctric parametcrs on the outer bank cell existing usually near the apex ofbend flows is discussed.The existence of outer bank cell is shown to be related to the shift of the maximum longitudinalvelocity below the References | Related Articles | Metrics

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Research on Computer Aided Lock Design(2) Liu Hua 1994, 13(3): 89-95.  Abstract ( )   PDF (332KB) ( )   After publishing the previous paper (Preliminary Research on compater Aided Lock Design), the author presents,in this paper, new research results of computer programmdesign for two-hinged type of navigation lock structure.Thispaper gives detail descriptio References | Related Articles | Metrics

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Research on Computer Aided Lock Design(3) Lia Hua 1994, 13(3): 96-102.  Abstract ( )   PDF (335KB) ( )   After publishing the previous paper(Preliminary Research on Computer Aided lock Design),the author presents,in this paper, a programming for cantilerer type or single-hinged type of navigation lock stracture, whick was developedtog ether with the research References | Related Articles | Metrics

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A Mcthod of Calculating of Lifting force Acting on Slide Valve Lip in Condition of Submerged Flow Liu Pinchang,Lain Zitang 1994, 13(3): 103-107.  Abstract ( )   PDF (268KB) ( )   Ilnder conditions of submerged flow, the lifting force acting on the lip of slide valve was generally obtained throughmodel tests in the past. The author presents a method of calculating the lifting foree in this paper.It is assumed that flow under bottom References | Related Articles | Metrics

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A Mechomical MOdel of Lateral Traction Properties for Vehide Tinec Li Yinong 1994, 13(3): 108-111.  Abstract ( )   PDF (203KB) ( )   n this paper. a mechanical model of lateral traction propenties for vehicle tine was estaslished by means of statisticalfitting on the basis of result analysis of actual ctire tests. The model has low fitting error and is colse to actual cases.Itcan there References | Related Articles | Metrics

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On the Performance of FIDIC in the Overseas Contracting Engineeing Xu Kejian ,Xu Renquan 1994, 13(3): 112-115.  Abstract ( )   PDF (249KB) ( )   In accordance with their practice of performing contract projects abroad the authoars rsaises some issues whichshould be paid attention to by the contractor during the performance of the contract.Additionally the paper discusses theconstractor’s self-cont References | Related Articles | Metrics