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超深基坑开挖辅助措施研究
引用本文:詹祥元,马能先.超深基坑开挖辅助措施研究[J].建筑科学,2012,28(9):104-108.
作者姓名:詹祥元  马能先
作者单位:1. 陕西铁路工程职业技术学院,陕西渭南,714000
2. 中铁一局新运工程有限公司,陕西渭南,712000
摘    要:以某地铁线路车站基坑为背景,通过数值模拟方法,分析了基坑开挖引起的围护结构及基坑周边地表变形规律,分析了不同基坑加固方案的效果,提出了合理的加固方案。研究结果表明:在现有基坑支护条件下,基坑开挖造成连续墙最大水平变形约为70mm,地表周围沉降为50mm,超过有关规定;经计算分析采用满堂加固具有良好的控制变形能力;在建议加固方案作用下,连续墙水平位移、地表变形和坑底隆起分别减少了约29%、21%和27%,满足规定要求。并将计算值与实测值进行了对比,验证了计算分析的合理性。

关 键 词:基坑开挖  变形  地基加固  数值模拟

Auxiliary Measures for Deep Foundation Pit Excavation
ZHAN Xiang-yuan , MA Neng-xian.Auxiliary Measures for Deep Foundation Pit Excavation[J].Building Science,2012,28(9):104-108.
Authors:ZHAN Xiang-yuan  MA Neng-xian
Affiliation:1.Shaanxi Railway Institute,Weinan 714000,Shaanxi,China;2.Xinyun Project CO.,LTD of China Railway First Group,Weinan 712000,Shaanxi,China)
Abstract:This paper analyses the deformation law of the maintenance of the structure in and around pit through numerical simulation.Taking a subway line pit as the background,the analysis on different effect of different reinforcement scheme is done and a rational reinforcement scheme of the pit is put forward.The results show that with the supporting conditions for the pit,the maximum level of continuous wall deformation is about 70mm with the pit excavation;the surface settlement around is 50mm which is more than the relevant provisions of specification.Analysis and calculation show that the full reinforcement has a good ability to control the deformation.Under the proposed reinforcement scheme,the horizontal displacement of continuous wall,the uplift of surface and the deformation of crater floors reduce by about 29%,21% and 27% respectively which conform to the requirements.And the comparison between calculated and measured values has proved in good agreement.
Keywords:pit excavation  deformation  strengthening of the foundation  numerical simulation
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