近地铁隧道基坑开挖保护措施及施工建议
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摘要
地铁隧道周边的基坑开挖必然会引起周围土体应力场的改变,从而导致隧道结构产生变形。以实际工程为例,详细阐述隧道周边基坑工程施工的难点,提出地铁保护措施和施工建议,并对基坑开挖引起隧道结构的变形值进行计算和分析。实测结果表明,基坑工程的设计方案和施工措施有效控制了地铁隧道的变形,可为同类工程建设提供参考和借鉴。
Excavation of foundation pit around the subway tunnel structure will inevitably cause the change of the stress field around the soil, which can result in the deformation of the tunnel structure. Taking practical engineering as an example, the difficulties of foundation pit construction around the subway tunnel are expounded, the subway protection measures and construction suggestions are proposed, and the deformation of tunnel structure which caused by excavation of foundation pit is calculated and analyzed. The measured results show that the design method and construction measures of the foundation pit engineering effectively control the deformation of the subway tunnel, which can provide reference for similar projects.
Excavation of foundation pit around the subway tunnel structure will inevitably cause the change of the stress field around the soil, which can result in the deformation of the tunnel structure. Taking practical engineering as an example, the difficulties of foundation pit construction around the subway tunnel are expounded, the subway protection measures and construction suggestions are proposed, and the deformation of tunnel structure which caused by excavation of foundation pit is calculated and analyzed. The measured results show that the design method and construction measures of the foundation pit engineering effectively control the deformation of the subway tunnel, which can provide reference for similar projects.
引文
[1]王如路.上海软土地铁隧道变形影响因素及变形特征分析[J].地下工程与隧道, 2009, 1(1):1-6.
[2]肖同刚.基坑开挖施工监控对临近地铁隧道影响分析[J].地下空间与工程学报, 2011, 7(5):1013-1017.
[3]王立峰,庞晋,徐云福,等.基坑开挖对近邻运营地铁隧道影响规律研究[J]. 2016, 37(7):2004-2010.
[4]黄福明.既有地铁隧道上方基坑支护设计与实践[J].低温建筑技术, 2018, 40(7):116-119.
[5]徐中华,王卫东.敏感环境下基坑数值分析中土体本构模型的选择[J].岩土力学, 2010, 31(1):258-264.
[6]郑刚,杜一鸣,刁钰,等.基坑开挖引起临近既有隧道变形的影响区研究[J].岩土工程学报, 2016, 38(4):599-612.
[2]肖同刚.基坑开挖施工监控对临近地铁隧道影响分析[J].地下空间与工程学报, 2011, 7(5):1013-1017.
[3]王立峰,庞晋,徐云福,等.基坑开挖对近邻运营地铁隧道影响规律研究[J]. 2016, 37(7):2004-2010.
[4]黄福明.既有地铁隧道上方基坑支护设计与实践[J].低温建筑技术, 2018, 40(7):116-119.
[5]徐中华,王卫东.敏感环境下基坑数值分析中土体本构模型的选择[J].岩土力学, 2010, 31(1):258-264.
[6]郑刚,杜一鸣,刁钰,等.基坑开挖引起临近既有隧道变形的影响区研究[J].岩土工程学报, 2016, 38(4):599-612.