- 摘 要
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雷國光，孫永超，李明
（吉林建筑大學(xué)土木工程學(xué)院, 長春 130118）
［摘要］采用FLAC3D有限差分法分析軟件建立了考慮基坑開挖與支護(hù)全過程及土體與支護(hù)結(jié)構(gòu)接觸特性的三維動(dòng)態(tài)計(jì)算模型，模擬了地鐵車站深基坑的開挖和支護(hù)全過程，分析了基坑施工中圍護(hù)墻變形、地表沉降、坑底隆起、坑外土體內(nèi)部變形的基本特性，計(jì)算得到的地表沉降曲線與已有文獻(xiàn)的經(jīng)驗(yàn)沉降曲線基本一致，驗(yàn)證了計(jì)算結(jié)果的適用性。此外，分析結(jié)果可為類似基坑工程的設(shè)計(jì)和施工提供有益參考。
［關(guān)鍵詞］FLAC3D； 基坑開挖與支護(hù)； 接觸特性； 變形分析
中圖分類號(hào)： TU473.2 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)： 1002-848X(2015)S2-0121-04
*吉林省國土資源廳軟科學(xué)研究項(xiàng)目（201304）。
作者簡介：雷國光，教授，Email:496635680@qq.com。
Three-dimensional numerical analysis of the deformation law of deep foundation pit of
subway station based on FLAC3D
Lei Guoguang, Sun Yongchao, Li Ming
(School of Civil Engineering, Jilin Jianzhu University， Changchun 130118， China)
Abstract: Three-dimensional dynamic calculation model which considering the braced excavation and the contact characteristics that between soil and the supporting structure was established, and the excavation and supporting process of deep foundation pit in subway station by FLAC3D software was simulated. The deflection of retaining walls, the settlement of ground surface, the heave of excavation bottom, and the movement of the deep strata outside the excavation were analyzed. The ground surface settlement curves of the numerical model are basically consistent with the empirical ones from the existing literatures, so its feasibility was proved. The numerical results provide a useful reference for the design and construction of similar deep excavation projects.
Keywords: FLAC3D; excavation and supporting of foundation pit; contact characteristic; deformation analysis
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