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《Journal of Railway Science and Engineering》 2008-03
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Numerical analysis method of the effect modeling on supporting structures performances due to excavating layer by layer

QI Chun-ming1,NIE Chun-long1,SU Zhi-man2 (1.School of Urban Construction,Nanhua University,Hengyang 421001,China;2.School of Civil and Architectural Engineering,Central South University,Changsha 410075,China)  
A numerical analysis method based on finite element method(FEM) was proposed to simulate the staged construction process,following the rule of excavating layer by layer.The key techniques in establishing the method,including selection of simulated archetype,simulating methods,and processes design,were discussed through proposing an integrated method in estimating calculating range of the model and an alternating method in evaluating the strut prestresses,introducing the Hardening-Soil(H-S) model,respectively designing the basic construction process and scheme of strut prestressing,both considering the changes of geo-structure and construction load.The results of the numerical analysis reflect the gradually varieties in the earth-structure association and construction load and their inter-influence.
【Fund】: 湖南省自然科学基金资助项目(05JJ40082)
【CateGory Index】: TU470
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1 LIU Xiao-hong~(1,2),RAO Qiu-hua~2,XIE Hai-feng~2(1.Department of Civil and and Architectural Engineering,Hunan Institute of Science and Technology,Yueyang 414000,China;2.School of Civil and Architectural Engineering,Central South University, Changsha 410075,China);New model for the lateral soil pressure distribution of composite soil nailing bracing and its engineering application[J];Journal of Railway Science and Engineering;2006-02
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