土工基础

›› 2011, Vol. 25 ›› Issue (5): 48-52.

• 工程实录 • 上一篇    下一篇

基坑降水井布置与围护结构稳定性

傅志峰1，  周 伟1，  李 杰2，  熊朝辉3
   

  1. （1.武汉地铁集团有限公司,武汉 430030;
    2.华中科技大学土木工程与力学学院,武汉 430074; 
    3.中铁第四勘察设计院集团有限公司,武汉 430063）
  • 收稿日期:2010-11-22 出版日期:2011-10-20 发布日期:2011-11-23
  • 作者简介:傅志峰，1977年生，博士，高级工程师，从事地铁工程施工安全管理工作。

Layout of Well Points in Deep Excavations and the Stability of Supporting Structures

FU  Zhi  feng1， ZHOU  Wei1，LI  Jie2， XIONG  Chao  hui3
   

  1. （1. Wuhan Metro Group Co. Ltd, Wuhan 430030; 
    2. College of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan 430074; 
    3. China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan 430063, China）
  • Received:2010-11-22 Online:2011-10-20 Published:2011-11-23

摘要： 地下水丰富时降水井的设置是保障围护结构安全的必要措施。降水井的布置方式不仅决定降水效果，也决定围护结构的工作性态及其环境效应。针对坑内单井、坑内双井以及坑外对称单井三种降水井布置，采用数值方法分析降水效果、围护结构工作性态以及对周边环境的影响，进而建议了较为合理的降水井布置参数。

关键词: 基坑, 降水井布置, 围护结构工作性态, 环境效应

Abstract: Well points are often used to control groundwater and enhance stability of deep excavations in areas of shallow groundwater. The distribution of these well points not only impacts the effectiveness of the de\|watering, but also influences the performance of the supporting structures and adjacent environments. From a case history, three different well point arrangements are evaluated with numerical analyses. These well point arrangements are: single row inside the excavated area; double rows inside the excavated area and symmetric double rows outside the excavated area. The numerical approaches study the efficiency of dewatering, the performance of the supporting structure surrounding the excavated areas and the impact on the adjacent environments for each well point arrangement. Better design parameters for layout of the well points for the deep excavations are suggested in this paper.