土工基础

›› 2016, Vol. 30 ›› Issue (5): 541-543.

• 工程实录 • 上一篇    下一篇

运营地铁上方基坑开挖工程实例分析

周 毅，彭 莹   

  1. （成都兴蜀勘察基础工程公司，成都 610070）
  • 收稿日期:2015-11-24 修回日期:2015-12-20 出版日期:2016-10-20 发布日期:2016-10-31
  • 作者简介:周 毅（1985-），男，工程师，研究方向为岩土工程。

A Case History of Deep Excavation above an Operational Metro Subway

ZHOU Yi, PENG Ying   

  1. (Chengdu Xingshu Geotechnical Investigation and Foundation Engineering Co., Chengdu 610070)
  • Received:2015-11-24 Revised:2015-12-20 Online:2016-10-20 Published:2016-10-31

摘要： 对于运营地铁上方开挖的基坑工程，对基坑的支护设计及施工是控制地铁变形的关键，以成都某一地铁上建工程为例，对地铁隧道采取了保护措施，地铁保护施工完后，基坑设计时采用了桩+锚索+支撑的形式进行开挖支护，施工中采取了控制降水水位，分层开挖，原有的地铁保护结构也发挥了减小位移、形成保护屏障的作用，位移变形在预计范围内。

关键词: 地铁, 深基坑, 基坑施工, 位移控制

Abstract: The excavation of foundations that are directly above an operational metro subway could be challenge. The design and construction of the supporting system are critical to the control of subway deformations. This paper presents a case history of the excavation above a live subway in Chengdu City. Prior to the excavation, the protective measures were installed on the metro subway. The strut supported anchored soldier piles were used for the excavation support. And the dewater technique was used for the layered excavation. The construction monitoring data indicate that, in addition to the excavation support measures, the subway protective work also helped to reduce the subway deformation and the measured deformations are acceptable.

Key words: Metro Subway, Deep Excavations, Foundation Constructions, Displacement Control