土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (1): 17-20.

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光谷五路地铁车站基坑围护桩顶水平位移的控制机制

王正庆1，郭运华2，石振宇1，李晓晓1，王天梁3   

  1. （1.中国水利水电第四工程局有限公司，西宁 810007；2.武汉理工大学 道路桥梁与结构工程湖北省重点实验室，武汉 430070；3.中国电力建设股份有限公司，北京 100048）
  • 收稿日期:2019-04-23 修回日期:2019-06-13 出版日期:2020-04-20 发布日期:2020-04-20
  • 作者简介:王正庆（1982-），男，高级工程师，研究方向为地基处理，市政工程基坑围护。

Horizontal Displacement Control of Supporting Structures for the Deep Excavations of a Metro Station

WANG Zhengqing1, GUO Yunhua2, SHI Zhenyu1, LI Xiaoxiao1, WANG Tianliang3   

  1. (1.China Water Conservancy and Hydropower Fourth Engineering Bureau Co. Ltd., Xining 810007;
    2.Hubei Key Laboratory of Roadway, Bridge & Structure Engineering, Wuhan University of Technology, Wuhan 430070;
    3.Power Construction Corporation of China, Beijing 100048)
  • Received:2019-04-23 Revised:2019-06-13 Online:2020-04-20 Published:2020-04-20

摘要： 以武汉地铁11号线光谷五路车站深基坑工程为背景，研究环境温度、施工活动及空间效应对围护桩顶水平位移的影响机制，揭示了深基坑围护桩变形的施工活动与环境温度的控制机制，变形的空间效应受基坑支撑形式及基坑布置形式的强烈影响，对基坑总体变形控制的影响有限。

关键词: 深基坑, 围护桩, 水平位移, 温度影响, 空间效应

Abstract: The control deformation in the supporting structures in the deep excavation is mainly determined through empirical methods and these experiencebased criteria could not meet the state f the practice requirements of the increasingly larger depth, span length and quantity of excavations. This paper presents a case history of the deep excavation support for the metro station of Fifth Route of Guanggu in Metro Line N. 11. Factors, such as, ambient temperature, construction activities as well as space effect, which might potentially affect the magnitude of the horizontal deflection in the deep excavation supporting structure, are evaluated. The results indicate that the lateral deflections are strongly affected by the ambient temperature and the adjacent construction activities. The space effect is a function of supporting structure type and excavation sequence. It has less effect on the lateral deformation control criteria.

Key words: Deep Excavation, Horizontal Deflection, Temperature Effect, Space Effect

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