土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (1): 1-5.

• 工程实录 •    下一篇

地铁车站基坑变形规律分析——以苏州地区为例

王占生1，张佳莉2，杜江涛3   

  1. （1.苏州市轨道交通集团有限公司，江苏苏州 215004；2.苏州大学轨道交通学院，江苏苏州 215131；
    3.广州地铁设计研究院股份有限公司苏州分公司，江苏苏州 215004）
  • 收稿日期:2020-01-15 修回日期:2020-02-05 出版日期:2021-02-28 发布日期:2021-02-28
  • 作者简介:王占生（1974-），男，博士研究生，教授级高级工程师，研究方向为地下工程。
  • 基金资助:
    苏州市2018年度第十六批科技发展计划（民生科技）项目（SS201831）

Ground Deformation During the Deep Excavation of Suzhou Metro Stations

WANG Zhansheng1, ZHANG Jiali2, DU Jiangtao3   

  1. (1.Suzhou Rail Transit Group Co. Ltd., Suzhou 215004;
    2.School of Rail Transportation, Soochow University, Suzhou 215131;
    3.Suzhou Division, Guangzhou Metro Design & Research Institute Co. Ltd., Suzhou 215004)
  • Received:2020-01-15 Revised:2020-02-05 Online:2021-02-28 Published:2021-02-28

摘要： 收集苏州地铁29个采用“地下连续墙+内支撑”支护的地铁车站基坑工程实测资料，统计分析苏州地铁车站基坑变形特性。统计结果表明：（1）基坑围护结构最大侧移δhm范围在（0.13%，0.67%）He，平均值为0.32%He，He为基坑开挖深度；（2）地下连续墙最大侧移点埋深Hδhm主要落于（He-5，He+3）范围内；（3）墙后最大地表沉降δvm范围在（0.07%，0.7%）He，平均值为0.26%He，墙后地表沉降影响范围为4.5He；（4）苏州地铁车站基坑δvm/δhm范围为0.346~1.54。研究成果可为苏州地区或其他软土地区地铁车站基坑围护结构设计提供参考。


关键词: 地铁, 基坑开挖, 地下连续墙, 基坑变形, 统计分析

Abstract: The construction excavation support monitoring data of 29 metro stations in Suzhou City that using the diaphragm wall plus internal support were collected and statistically analyzed in order characterize the deformation of the deep excavation support system. The statistical data indicate that: 1) the maximum lateral deflection of the supporting structure, δhm, falls into the range between 0.13% He and 0.67%He with an average deflection value of 0.32%He, where He is the excavation depth; 2) The measured maximum deflection falls into the range from He-5 (meters) to He+3 (meters); 3) the maximum ground subsidence behind the supporting structure, δvm, is within a range between 0.07%He and 0.7%He with an average of 0.26%He; the horizontal influence zone of the ground subsidence is approximately 4.5He; 4) The ratio of ground vertical deformation behind the supporting structure over lateral deflection at the supporting structure, δvm/δhm, is between 0.346 and 1.54. 

Key words: metro subways, deep excavations, diaphragm wall, deformation during excavations, statistical analysis

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