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［摘要］通過廣州珠江新城B1-7項(xiàng)目基坑支護(hù)工程，討論在場地狹窄的鬧市區(qū)并且附近有運(yùn)營的地鐵隧道的情況下，進(jìn)行基坑支護(hù)和土方開挖時產(chǎn)生的問題?？紤]地質(zhì)條件、主體結(jié)構(gòu)形式、施工場地和地鐵隧道等因素，提出采用環(huán)形結(jié)構(gòu)支撐體系作為基坑支護(hù)結(jié)構(gòu)，有效地解決了場地狹窄、阻礙主體結(jié)構(gòu)施工的內(nèi)支撐等問題。采用理正深基坑支護(hù)FSPW 5.41和MIDAS/GTS兩個軟件進(jìn)行計算，分析基坑開挖對地鐵隧道、周邊建筑物的影響。計算結(jié)果和監(jiān)測數(shù)據(jù)顯示，采用環(huán)形結(jié)構(gòu)支撐體系有效地保證了地鐵及周邊建筑物的安全。

［關(guān)鍵詞］基坑支護(hù)；深基坑；環(huán)形支撐；主體結(jié)構(gòu)；地鐵隧道

中圖分類號：TU753.1文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2012)06-0115-03

 

Liu Zhihong¹,Zhang Ruihua²

（1 Guangzhou Design Institute, Guangzhou 510620, China; 2 Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China）

 

Abstract: Based on Guangzhou Zhujiang New Town B1-7 foundation pit supporting project, the problems in pit support and soil excavation were discussed under the condition of narrow sites in city centre and the running subway tunnel nearby. Considering geological conditions, main structure forms, constructing sites and subway tunnel etc factors, annular structure supporting and protection of deep foundation pit were proposed to solve the problems in the soil excavation and the main structure construction. Using Lizheng deep pit supporting F-SPW 5.41 and MIDAS/GTS software, the effect of soil excavation on subway tunnel and buildings nearby was analyzed. The results show that the application of annular structure supporting and protecting can ensure the safety of subway and buildings nearby.

Keywords: foundation pit remaining and protection; deep foundation pit; annular support; main structure; subway tunnel

*廣東省優(yōu)秀青年創(chuàng)新人才培養(yǎng)計劃項(xiàng)目（K1112616）。

作者簡介：劉志宏，工程碩士，教授級高級工程師，Email:wendy4100@yahoo.com.cn.

 

［1］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.

［2］JGJ 120—99建筑基坑支護(hù)技術(shù)規(guī)程［S］.北京：中國建筑工業(yè)出版社，1999.