緊鄰深基坑施工相互影響的模擬分析*
黃俊光1,韓建強(qiáng)1,張瑞華2,鄒家南3
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黃俊光1,韓建強(qiáng)1,張瑞華2,鄒家南3(1 廣州市設(shè)計院,廣州 510620; 2 仲愷農(nóng)業(yè)工程學(xué)院,廣州 510225; 3 華南理工大學(xué)土木與交通學(xué)院,廣州 510640)[摘要]針對緊鄰深基坑工程設(shè)計案例進(jìn)行其相互影響分析,采用有限元分析軟件MIDAS/GTS模擬了緊鄰深基坑在不同施工工況下基坑的相互影響。分析表明,兩緊鄰深基坑在不同的施工組合下同時施工會誘發(fā)對方基坑圍護(hù)結(jié)構(gòu)發(fā)生不同程度的水平側(cè)向位移,其最大水平側(cè)向位移均出現(xiàn)在開挖至基底的施工工況中。[關(guān)鍵詞]基坑工程;緊鄰;施工影響;雙排樁;超前錨索;位移中圖分類號:TU753.1文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2012)06-0112-03Simulation on construction interactions for two adjacent deep foundation pitsHuang Junguang1, Han Jianqiang1, Zhang Ruihua2, Zou Jianan3(1 Guangzhou Design Institute, Guangzhou 510620, China; 2 Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; 3 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)Abstract: A project design adjacent to deep foundation pit was analyzed by using the finite element analysis software MIDAS/GTS,and the deep foundation pit construction in the different conditions was simulated. Based on the simulation results, the conclusion shows that when two adjacent deep foundation pits are constructed simultaneously in different conditions, the enclosure structure of another foundation pit will occur different horizontal displacement,and the maximum horizontal displacement of one foundation pit will appear when another foundation pit is excavated at the bottom.Keywords: foundation pit; adjacent; construction interaction; double-row pile; pre-anchorage cable; displacement*廣東省優(yōu)秀青年創(chuàng)新人才培養(yǎng)計劃項目(K1112616)。作者簡介:黃俊光,工程碩士,高級工程師, Email:huangjunguang@gzdi.com.參考文獻(xiàn)[1]孫靜.我國基坑工程發(fā)展現(xiàn)狀綜述[J].黑龍江水專學(xué)報,2010,37(1):50-53.[2]侯永茂,王建華,陳錦劍.超大型深基坑開挖過程三維有限元分析[J].巖土工程學(xué)報,2006,28(S1): 1374-1377.[3]陳俊生,莫海鴻,劉叔灼,等.復(fù)雜環(huán)境深基坑施工過程的模擬分析[J].巖土力學(xué),2010,31(2):649-655.[4]張程林,彭炎華.深基坑樁錨支護(hù)數(shù)值模擬及參數(shù)分析[J].施工技術(shù),2008,37(S2):45-51.[5]崔宏環(huán),張立群,趙國景.深基坑開挖中雙排樁支護(hù)的三維有限元模擬[J]. 巖土力學(xué), 2006,27(4): 662-666.[6]GJB 02—98廣州地區(qū)建筑基坑支護(hù)技術(shù)規(guī)定[S].廣州市建設(shè)委員會,廣州市建筑科學(xué)研究院,1998.