緊鄰已建車站基坑開挖近接施工影響分析
郭海柱1,2，張慶賀2
- 摘 要
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(1 深圳市地鐵集團(tuán)有限公司，深圳 518026； 2 同濟(jì)大學(xué)巖土及地下工程教育部重點實驗室，上海 200092)［摘要］以上海市軌道交通8號線和10號線換乘車站共用擴(kuò)大站廳層基坑工程為背景，采用有限元方法分析基坑開挖對已建車站結(jié)構(gòu)的影響規(guī)律。結(jié)合監(jiān)測數(shù)據(jù)，重點研究共用地下連續(xù)墻和車站結(jié)構(gòu)板的變形規(guī)律，指出緊鄰車站基坑開挖卸載引起共用地下連續(xù)墻向基坑內(nèi)變形，已建車站結(jié)構(gòu)板靠近基坑一側(cè)上浮較明顯?？偨Y(jié)了高壓旋噴樁加固、分塊鑿除共用地下連續(xù)墻等控制已建車站結(jié)構(gòu)變形的關(guān)鍵技術(shù)措施，為同類工程設(shè)計施工提供借鑒。［關(guān)鍵詞］地鐵車站；地下連續(xù)墻；深基坑；近接施工Influence analysis on excavation of deep foundation pit adjacent to operating subway stationGuo Haizhu1,2， Zhang Qinghe2(1 Shenzhen Metro Group Limited Company, Shenzhen 518026, China； 2 Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092， China)Abstract:Based on the excavation of the northeast common structures of the cross-shaped transfer subway station at the intersection of Shanghai URT Line 8 and Line 10, the effect of excavation on the constructed subway station structures with FEM was studied. According to the monitored data, the deformation of underground retaining wall and subway station structures was mainly analyzed. It was presented that the shared retaining wall deformed towards the excavation and the sides of structural slabs close to the excavation deformed upward apparently, due to the excavation adjacent to the station. Some important construction technologies of controlling structural deformation，including high-pressure rotary jetting pile reinforcing, shared retaining wall partitioning chiseling，were summarized and could be reference for design and construction of similar projects.Keywords:subway station; underground retaining wall; deep foundation pit; approaching excavation作者簡介：郭海柱，博士，工程師，Email:guohaizhu@126.com。參考文獻(xiàn)［1］仇文革.地下工程近接施工力學(xué)原理與對策的研究［D］.成都:西南交通大學(xué),2003.［2］聞毓民.兩孔平行盾構(gòu)隧道近接施工的力學(xué)行為分析［D］.成都:西南交通大學(xué),2005.［3］李永明.盾構(gòu)隧道近接基坑施工的數(shù)值模擬及地面變形分析［D］.武漢:武漢理工大學(xué),2007.［4］孔祥鵬,劉國彬,廖少明.明珠線二期上海體育館地鐵車站穿越施工對地鐵一號線車站的影響［J］.巖石力學(xué)與工程學(xué)報,2004,23(5):821-825.［5］曾遠(yuǎn),李志高,王毅斌.基坑開挖對鄰近地鐵車站影響因素研究［J］.地下空間與工程學(xué)報,2005,1(4):642-645.［6］廖少明,楊俊龍,奚程磊.盾構(gòu)近距離穿越施工的工作面土壓力研究［J］.巖土力學(xué),2005,26(11):1727-1730.［7］廖少明,余炎,李文林.地中彈性邊界對盾構(gòu)近距離掘進(jìn)位移場的影響［J］.巖石力學(xué)與工程學(xué)報,2005,24(19):3534-3540.［8］高盟,高廣運(yùn),馮世進(jìn),等.基坑開挖引起緊貼運(yùn)營地鐵車站的變形控制研究［J］.巖土工程學(xué)報,2008,30(6):818-823.［9］劉建航,侯學(xué)淵.基坑工程手冊［M］.北京:中國建筑工業(yè)出版社,1997.［10］SZ—08—2000上海地鐵基坑工程施工規(guī)程［S］.上海：上海市市政工程管理局,2000.
