|Table of Contents|

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

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

Issue:
2026年02期
Page:
185-195
Research Field:
岩土工程
Publishing date:

Info

Title:
Numerical simulation study of rapid dewatering technology in excavation leakage emergency rescue
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))
Keywords:
excavation leakage;  emergency rescue;  rapid dewatering;  groundwater recharge;  settlement
PACS:
TU463
DOI:
10.19815/j.jace.2024.11110
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.

References:

[1] 郑 刚,朱合华,刘新荣,等.基坑工程与地下工程安全及环境影响控制[J].土木工程学报,2016,49(6):1-24.
ZHENG Gang, ZHU Hehua, LIU Xinrong, et al. Control of safety of deep excavations and underground engineering and its impact on surrounding environment[J]. China Civil Engineering Journal, 2016, 49(6): 1-24.
[2]GOH A T C, ZHANG R H, WANG W, et al. Numerical study of the effects of groundwater drawdown on ground settlement for excavation in residual soils[J]. Acta Geotechnica, 2020, 15(5): 1259-1272.
[3]郑 刚.软土地区基坑工程变形控制方法及工程应用[J].岩土工程学报,2022,44(1):1-36.
ZHENG Gang. Method and application of deformation control of excavations in soft ground[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(1): 1-36.
[4]谢小创,张冬梅.基于物质点法的盾构隧道涌水涌砂模拟与应用[J].隧道建设(中英文),2023,43(6):1045-1056.
XIE Xiaochuang, ZHANG Dongmei. Simulation of water-soil gushing in shield tunnel based on material point method and its application[J]. Tunnel Construction, 2023, 43(6): 1045-1056.
[5]周红波,蔡来炳.软土地区深基坑工程承压水风险与控制[J].同济大学学报(自然科学版),2015,43(1):27-32.
ZHOU Hongbo, CAI Laibing. Risk and control of the artesian water for deep excavation engineering in soft soil area[J]. Journal of Tongji University(Natural Science), 2015, 43(1): 27-32.
[6]刘胜利,蒋盛钢,曹成勇.强透水砂卵地层深基坑地下水控制方案比选与优化设计[J].铁道科学与工程学报,2018,15(12):3189-3197.
LIU Shengli, JIANG Shenggang, CAO Chengyong. Comparison and optimization of alternatives to groundwater control for a deep excavation in highly permeable sand and gravel[J]. Journal of Railway Science and Engineering, 2018, 15(12): 3189-3197.
[7]李召峰,李术才,刘人太,等.富水破碎岩体注浆加固材料试验研究与应用[J].岩土力学,2016,37(7):1937-1946.
LI Zhaofeng, LI Shucai, LIU Rentai, et al. Development of the grouting material for reinforcing water-rich broken rock masses and its application[J]. Rock and Soil Mechanics, 2016, 37(7): 1937-1946.
[8]朱 旻,龚晓南,高 翔,等.盾构隧道注浆纠偏模型试验研究[J].铁道科学与工程学报,2020,17(3):660-667.
ZHU Min, GONG Xiaonan, GAO Xiang, et al. Model tests of correction of displaced shield tunnel using grouting technique[J]. Journal of Railway Science and Engineering, 2020, 17(3): 660-667.
[9]刘人太.水泥基速凝浆液地下工程动水注浆扩散封堵机理及应用研究[D].济南:山东大学,2012.
LIU Rentai. Study on diffusion and plugging mechanism of quick setting cement based slurry in underground dynamic water grouting and its application[D]. Jinan: Shandong University, 2012.
[10]周阳宗.明挖隧道涌水抢险中二次快速注浆的实践[J].国防交通工程与技术,2016,14(2):58-60,53.
ZHOU Yangzong. On the application of the quick two-times slip-casting to the treatment of water gush in an open-cut tunnel[J]. Traffic Engineering and Technology for National Defence, 2016, 14(2): 58-60, 53.
[11]LIU J C, TAN Y. Review of through-wall leaking incidents during excavation of the subway stations of Nantong metro line 1 in thick water-rich sandy strata[J]. Tunnelling and Underground Space Technology, 2023, 135: 105056.
[12]SU G L, XIONG C B, ZHANG G Y, et al. Coupled processes of groundwater dynamics and land subsidence in the context of active human intervention, a case in Tianjin, China[J]. Science of the Total Environment, 2023, 903: 166803.
[13]CHAI J C, SHEN S L, ZHU H H, et al. Land subsidence due to groundwater drawdown in Shanghai[J]. Géotechnique, 2004, 54(2): 143-147.
[14]ANANDAN K S, SAHAY S N, KARTHIKEYAN S. Delineation of recharge area and artificial recharge studies in the Neyveli hydrogeological basin[J]. Mine Water and the Environment, 2010, 29(1): 14-22.
[15]ZHANG Y Q, WANG J H, CHEN J J, et al. Numerical study on the responses of groundwater and strata to pumping and recharge in a deep confined aquifer[J]. Journal of Hydrology, 2017, 548: 342-352.
[16]BOURI S, BEN DHIA H. A thirty-year artificial recharge experiment in a coastal aquifer in an arid zone: the Teboulba aquifer system(Tunisian Sahel)[J]. Comptes Rendus Geoscience, 2010, 342(1): 60-74.
[17]ZHENG G, HA D, ZENG C F, et al. Influence of the opening timing of recharge wells on settlement caused by dewatering in excavations[J]. Journal of Hydrology, 2019, 573: 534-545.
[18]ZHENG G, LI Q H, CHENG X S, et al. Diaphragm wall deformation and ground settlement caused by dewatering before excavation in strata with leaky aquifers[J]. Géotechnique, 2024, 74(1): 1-17.
[19]郑 刚,栗晴瀚,程雪松,等.承压层快速减压与回灌应用于隧道抢险的理论与设计[J].岩土力学,2020,41(增1):208-216.
ZHENG Gang, LI Qinghan, CHENG Xuesong, et al. Theory and design of fast decompression and recharge of confined layer applied in tunnel emergency rescue[J]. Rock and Soil Mechanics, 2020, 41(S1): 208-216.
[20]武永霞.基坑止水帷幕对含水层渗流作用的计算方法研究[D].上海:上海交通大学,2016.
WU Yongxia. Method of barrier effect of waterproof curtain on groundwater seepage during dewatering in aquifers[D]. Shanghai: Shanghai Jiao Tong University, 2016.
[21]建筑与市政工程地下水控制技术规范:JGJ 111—2016[S].北京:中国建筑工业出版社,2017.
Technical code for groundwater control in building and municipal engineering: JGJ 111—2016[S]. Beijing: China Architecture & Building Press, 2017.
[22]ZHOU S L, CHENG X S, LI Q H, et al. Failure analysis of water gushing in excavation and application of rapid dewatering and recharge emergency measures[J]. Engineering Failure Analysis, 2024, 159: 108074.

Memo

Memo:
-
Last Update: 2026-04-01