土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (6): 694-697.

• 工程实录 • 上一篇    下一篇

砂袋围堰在水下深基坑工程中的应用

陈 明，文建鹏   

  1. （深圳市勘察测绘院(集团)有限公司，广东深圳 518028）
  • 收稿日期:2021-06-10 修回日期:2021-06-17 出版日期:2021-12-30 发布日期:2021-12-24
  • 作者简介:陈明（1987-），男，硕士，工程师，注册岩土工程师，研究方向为岩土工程。

Sandbag as the Cofferdam in a Deep Water Excavation Project

CHEN Ming， WEN Jianpeng   

  1. (Shenzhen Geotechnical Investigation & Surveying Institute Group Co. Ltd., Shenzhen 518028)
  • Received:2021-06-10 Revised:2021-06-17 Online:2021-12-30 Published:2021-12-24

摘要： 基于北京某污水处理厂升级改造工程，结合建设单位对污水厂运营和建设的需求，阐述了采用砂袋围堰将现状水深10.5 m的污水处理厂一分为二，一侧维持污水厂正常运营，另一侧抽水后开挖基坑工程的设计思路和施工工艺。结合有限元分析软件PLAXIS 2D计算结果和现场反馈的监测数据，可知在深水中利用砂袋围堰作为挡水结构抽水后再开挖基坑工程是可行的，可为具有相似背景和条件的项目提供指导或参考。

关键词: 水下深基坑, 砂袋围堰, 有限元分析, 挡水结构

Abstract: Based on an upgrading project of a wastewater treatment plant in Beijing and combined with the need of owner’s operation requirements, this paper presents the design conception and the construction technique of the wastewater treatment plant. The entire upgrading project site has a water depth of 10.5 meters and the staged construction divided the original site into two parts by a sandbag cofferdam with one side maintained the normal operation, and the other side was dewatered and excavated. Combined with the results from the finite element analysis software PLAXIS 2D and the construction monitoring data, it is technically feasible to use the sandbag cofferdam as water retaining structure in the deepwater dewatering requirements. This project can provide some guidance or references for projects with similar background and conditions.

Key words: underwater deep excavation, cofferdam using sandbag, finite element analysis, water retention structure

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