土工基础

›› 2015, Vol. 29 ›› Issue (3): 58-61.

• 工程实录 • 上一篇    下一篇

深基坑降水对基坑稳定影响的分析

李长山   

  1. （中铁七局技术中心，郑州 450016）
  • 收稿日期:2014-11-24 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:李长山(1963-)，高级工程师，主要研究方向为地下工程。

Dewatering Impact on the Stability of the Deep Excavations

LI Changshan   

  1. (Technical Center of China Railway No. 7 Engineering Group Co. Ltd., Zhengzhou 450016)
  • Received:2014-11-24 Online:2015-06-20 Published:2015-06-26

摘要： 以杭州地铁秋涛路站深基坑施工为例，对如何保证降水效果和基坑安全，以及如何降低深基坑施工对周围环境影响方面进行了探索，对基坑降水所引起的基坑周围地表发生沉降的原因进行了分析，并通过坑内外水位变化及地表沉降监测情况分析，得出围护结构止水效果与坑外地表沉降关系，以及在降水过程中因围护结构漏水而产生的坑外地表沉降范围和沉降量变化的发展情况，进而提出如何防止降水不利影响的措施。

关键词: 基坑降水, 对基坑稳定, 影响分析

Abstract: The deep excavation for Qiutao Road Station of Hangzhou Metro dewatering case history is presented in this paper. The dewatering induced stability at the bottom of the excavated area, the ground subsidence in the adjacent ground as well as the construction impact on the adjacent environment are discussed. Relationship between the seepage cutoff effect and the ground settlement is obtained through the groundwater monitoring on both sides of the excavation. The seepage water leakage induced additional ground subsidence is also discussed.

Key words: Dewatering in Deep Excavations, Stability of the Excavated Area, Impact Effect