土工基础

›› 2015, Vol. 29 ›› Issue (2): 41-44.

• 工程实录 • 上一篇    下一篇

某小区基坑工程降水方案研究

王 江1，杨 智2   

  1. (1.广东省惠州地质工程勘察院，广东惠州 516008;2.珠海大横琴股份有限公司，广东珠海 519031)
  • 收稿日期:2014-12-08 出版日期:2015-04-20 发布日期:2015-05-04
  • 作者简介:王 江（1981-），男，工程师，工学硕士，研究方向为岩土工程设计。

Dewatering for a Deep Excavation

WANG Jiang1, YANG Zhi2   

  1. (1.Guangdong Huizhou Geological Investigation Institute Co., Ltd., Huizhou, 516008
    2.Zhuhai Da Heng Qin Company Limited, Zhuhai, 519031)
  • Received:2014-12-08 Online:2015-04-20 Published:2015-05-04

摘要： 以某基坑工程为背景,结合场区工程地质及水文地质条件,比选分析确定了基坑的支护方案。在此基础上参考类似地区工程经验，确定降水的影响半径及场区综合渗透系数参考值，分别对上层滞水和承压水二种类型地下水进行了降水设计。对于上层滞水采取集水明排的措施处理；对于下层承压水采用深井降水技术进行了降水设计计算。验算结果表明:各系统井点数量及井点间距均能够满足相关规范及本工程降水要求，可以保证基坑及基础施工安全，降水方案，安全可靠，经济合理，可为该地区其他类似基坑降水工程提供指导。

关键词: 深基坑, 降水, 设计, 井点降水

Abstract: This paper presents a case history of a deep excavation supporting and dewatering design. The alternates of the supporting systems are compared and selected based on the site engineering geological and hydrological conditions. The site average permeability coefficient and radius of the dewatering cone are determined through the experience in similar site conditions. The dewatering design considered measures for both the upper perched groundwater and the lower artesian groundwater. The water collecting ditches are provided for the upper perched water. The dewatering requirements for the lower artesian water are carefully examined. The results indicate that the design point well spacing and the number of pinot wells are appropriate. The dewatering system is adequate for the deep excavation construction.

Key words: Deep Excavation, Dewatering Design, PointWell Dewatering