土工基础

›› 2017, Vol. 31 ›› Issue (1): 49-53.

• 工程实录 • 上一篇    下一篇

软土地区基坑支护失稳原因分析及其处治对策

夏翛   

  1. （91552部队，海南三亚 572000）
  • 收稿日期:2016-10-31 修回日期:2016-11-15 出版日期:2017-02-20 发布日期:2017-02-24
  • 作者简介:夏 翛（1975-），男，高级工程师，研究方向为建筑工程、水运工程施工等。

Failure Analysis and Mitigation of a Deep Excavation Support Failure in Soft Soils

XIA Xiao   

  1. （PLA 91552 Brigade，Sanya Hainan 572000）
  • Received:2016-10-31 Revised:2016-11-15 Online:2017-02-20 Published:2017-02-24

摘要： 软土地区的基坑施工常常因基坑周围过度堆载、地下水位波动、支护强度不够等问题发生工程事故。结合某软土基坑支护失稳案例，从地质条件、支护方案和基坑周边超载等方面查找原因，按照先控制后治理的事故处理思路，简要介绍事故处理方案和处治对策，包括加强支护结构、调整基坑土方施工方案等措施，并对此类软土基坑的施工管理经验进行了总结，为该地区的软土基坑设计和施工提供参考。

关键词: 基坑支护, 软土地区, 失稳分析, 处理措施

Abstract: As the results of overloading around the deep excavation area, water table fluctuation and the low supporting strength of the excavation support system, failures are often occur in the soft soils during the construction. This paper analyzes the failure modes of the deep excavation supporting system from the geological conditions, support scheme and loading conditions. Following the concept of control the failure first and mitigate the problem later, the guidelines for the emergency reaction, including the strengthening the supporting system and adjustment of the earth work inside the excavated area. The construction management aspects of the deep excavation are also introduced in the paper.

Key words: Deep Excavation Support, Soft Soil Area, Failure Analysis, Mitigation Measures