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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

期数:

2026年02期

页码:

185-195

栏目:

岩土工程

出版日期:

2026-03-30

文章信息/Info

Title:

Numerical simulation study of rapid dewatering technology in excavation leakage emergency rescue

文章编号:

1673-2049(2026)02-0185-11

作者:

程雪松¹,邱骏¹,栗晴瀚¹,石建成¹,牛琪²,杨铖伟²,宋占伟²

(1. 天津大学 土木工程系,天津 300350; 2. 中国铁建大桥工程局集团有限公司,天津 300200)

Author(s):

CHENG Xuesong¹, QIU Jun¹, LI Qinghan¹, SHI Jiancheng¹, NIU Qi², YANG Chengwei², SONG Zhanwei²

(1. Department of Civil Engineering, Tianjin University, Tianjin 300350, China; 2. China Railway Construction Bridge Engineering Bureau Group Co., Ltd., Tianjin 300200, China))

关键词:

基坑渗漏;  抢险;  快速降水;  地下水回灌;  沉降

Keywords:

excavation leakage;  emergency rescue;  rapid dewatering;  groundwater recharge;  settlement

分类号:

TU463

DOI:

10.19815/j.jace.2024.11110

文献标志码:

A

摘要:

以天津某基坑止水帷幕渗漏水工程案例为依托,基于流固耦合数值模型,分析了基坑渗漏缝面积与所在土层透水性对渗漏水量及含水层水位变化的影响,讨论了降水井不同距离单井点和不同数量均布多井点等多种降水工况对降低渗漏的作用及对周边地表沉降的影响,研究了回灌井布设数量与开启策略等多种回灌工况在沉降控制中的作用。结果表明:富水软土地区承压含水层处发生渗漏时,直径30 cm的地连墙接缝孔洞渗漏水流量可达81 m³·d^-1; 基坑渗漏水量主要受到渗漏缝面积及渗漏位置处土层渗透性的影响; 在基坑止水帷幕出现渗漏水时,采用快速降水技术来降低含水层水压力,可使渗漏水流量减少23%～46%,为注浆封堵等治理手段创造有利条件; 采用快速降水技术降低渗漏灾害会引发基坑周边地表沉降,持续降水3 d后距基坑57.5 m处地表沉降达到6 mm,10 d后沉降将超过10 mm; 使用地下水回灌可有效减小基坑周边地表沉降,同时不影响快速降水对基坑渗漏水流量的减缓作用。

Abstract:

Based on an excavation waterproof curtain leakage project in Tianjin, the effects of leakage gap size and soil layer permeability on leakage volume and fluctuations in aquifer water levels were analyzed using a fluid-solid coupling numerical model. The effects of various precipitation conditions such as single wells placed at different distances and multiple evenly distributed wells on the reduction of leakage and the settlement of surrounding ground surface were discussed. The influence of different recharge well configurations and activation strategies in controlling settlement was also investigated. The results show that in water-rich soft soil regions, leakage through a confined aquifer can reach up to 81 m³·d^-1 through a 30 cm diameter seam in the diaphragm wall. The primary factors affecting leakage volume are the size of the leakage gap and the soil's permeability at the leakage point. When the leakage occurs in the excavation waterproof curtain, rapid dewatering techniques can reduce aquifer pressure, decreasing leakage flow by 23% to 46%, thus creating favorable conditions for remediation methods like grouting. Rapid dewatering may also cause surface settlement near the excavation. After 3 d of continuous dewatering, surface settlement at 57.5 m from the excavation reaches 6 mm, and it exceeds 10 mm after 10 d. Groundwater recharge can effectively mitigate surface settlement around the excavation while maintaining the benefits of rapid dewatering in reducing leakage flow.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2024-11-20
基金项目:国家重点研发计划项目(2023YFC3009300); 天津市杰出青年基金项目(24JCJQJC00170); 国家自然科学基金创新研究群体项目(52421005)
作者简介:程雪松(1985-),男,工学博士,教授,博士生导师,E-mail:cheng_xuesong@163.com。
通信作者:栗晴瀚(1995-),男,工学博士,助理研究员,E-mail:liqh1995@tju.edu.cn。
Author resume: CHENG Xuesong(1985-), male, PhD, professor, E-mail: cheng_xuesong@163.com; LI Qinghan(1995-), male, PhD, research assistant, E-mail: liqh1995@tju.edu.cn.

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更新日期/Last Update: 2026-04-01