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地铁车站深基坑地下连续墙优化设计研究
吴小将刘国彬李志高卢礼顺

(同济大学地下建筑与工程系上海 200092) (上海磁悬浮交通发展有限公司上海 201204)
摘要: 通过对上海软土地区几个地铁车站深基坑工程中地下连续墙弯矩和钢筋应力的跟踪监测,得到
了这些基坑地下连续墙所受弯矩的包络图,并与地下连续墙能承受的弯矩极值进行对比,得到深基坑工程地
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下连续墙的弯矩承载能力尚有一定的发挥余地。分析了导致设计中地下连续墙配筋偏大主要是由于最大裂
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缝宽度控制值 wlim = 0 2mm 引起的,若将地下连续墙的最大裂缝宽度放宽至 wlim = 0 3mm ,则可以在满足深基
坑工程地下连续墙的弯矩承载能力的同时,大大降低地下连续墙的配筋,减少工程投资,达到充分利用建设
资金的目的。
关键词: 深基坑地下连续墙承载力最大裂缝宽度
RESEARCH ON OPTIMIZATION DESIGN OF DIAPHRAGM WALL FOR METRO STATION
Wu Xiaojiang Liu Guobin Li Zhigao
(Department of Geotechnical Engineering ,Tongji University Shanghai 200092)
Lu Lishun
(Shanghai Maglev Transportation Development Co. ,Ltd Shanghai 201204)
Abstract : From the survey results of some excavations , it is found that the designs of diaphragm wall are conservative :both
the stress of reinforcing steel and the moment of wall are less than the design value. Through analyzing the theory of
diaphragm wall design , it is found that the conservative design is caused by the allowable width of structure crack wlim =
0 2mm. It is analyzed if the allowable width of structure crack is broadened to wlim = 0 3mm , the ratio of reinforcement will
be decreased , at the same time , the safety of the excavation is guaranteed and project investment will also be reduced.
Keywords : deep excavation diaphragm wall bearing capacity allowable crack width