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Retaining pile and columns difference settlement analysis of a top down method foundation pit

TANG Xiao-qiang1,2 ZHANG Zhi-hao2 ZHANG Geng-cheng2(1.Environmental Science and Engineering College,Ocean University of China,Qingdao 266100,China; 2.China Petroleum East China Survey & Design Institute Geotechnical Engineering Company,Qingdao 266071,China)  
In this paper,a project of air defense top down foundation pit was numerical computed by plaxis.And according to the above calculation,an analysis of difference settlement of supporting pile and post with a hard layer(strong weathering rock) under the bottom was presented.Pit-bottom uplift estimated by Tongji method,calculation and the results of numerical simulation coincide,indicating that the rock area basal rebound main control factor is simple unloading rebound.If reversed construction of retaining structure and columns are embedded in the rock piles,the differential settlement between the two components is very small,meeting the requirements of the structural design.
【CateGory Index】: TU753
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