多含水层中开挖降水作用下的圆形深基坑流固耦合分析及地层分布影响研究

doi:10.1007/s12204-024-2745-9

J Shanghai Jiaotong Univ Sci ›› 2026, Vol. 31 ›› Issue (2): 475-485.doi: 10.1007/s12204-024-2745-9

多含水层中开挖降水作用下的圆形深基坑流固耦合分析及地层分布影响研究

1. 上海交通大学土木工程系；上海市公共建筑和基础设施数字化运维重点实验室，上海200240；2. 华东建筑设计研究院有限公司上海地下空间与工程设计研究院，上海200002；3. 上海市政工程设计有限公司，上海200092

收稿日期:2023-09-07 接受日期:2023-11-26 出版日期:2026-04-01 发布日期:2024-06-21

Effect of Stratum Distribution on Deep Circular Excavation with Dewatering Above a Multi-Aquifer System by Hydro-Mechanical Coupled Numerical Analysis

严玥恒¹，李明广¹，徐中华²，潘春辉³

1. Department of Civil Engineering; Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China; 2. Shanghai Underground Space Engineering Design & Research Institute, East China Architecture Design & Research Institute Co., Ltd., Shanghai 200002, China; 3. Shanghai Municipal Engineering Design Co., Ltd., Shanghai 200092, China

Received:2023-09-07 Accepted:2023-11-26 Online:2026-04-01 Published:2024-06-21

摘要/Abstract

摘要： 在多层含水层中开展降水，其环境影响与地层分布密切相关。然而，以往的研究主要关注特定地层开挖降水作用下的环境影响，缺乏对地层分布的系统性研究。本研究基于上海中心大厦深基坑工程，建立了一个流固耦合数值模型，通过现场实测数据对模型输入参数进行了验证。在模型验证的基础上，对弱透水层的厚度、渗透性以及埋深开展了参数分析。研究表明，弱透水层的厚度以及渗透性对基坑沉降的影响较小，坑外地表沉降随着承压含水层厚度的增加而显著增加。基于数值分析，建立了一个可预测坑外最大地表沉降的拟合公式，该预测公式综合考虑基坑开挖深度、承压水头降深和多层含水层的土层分布。通过工程现场测试数据计算验证，该拟合公式适用于对上海软土深基坑的最大地面沉降进行预测。

关键词: 流固耦合分析, 深基坑, 承压降水, 地层变形, 多含水层

Abstract: Dewatering in multilayered aquifers is closely related to stratigraphic configuration. However, previous studies concentrate on the excavation response to dewatering in particular strata, lacking systematic study on the influence of stratum configuration. This study developed a hydro-mechanical coupled numerical model based on the practical engineering of Shanghai Tower deep excavation. The model and input parameters were validated by field measurements. Besides, a parametric study was conducted to investigate the effect of the thickness, permeability and depth of the aquitard on excavation performances. The analysis indicated that settlements in the excavation were insensitive to the thicknesses and permeability of aquitards, while ground surface settlement increased significantly with the increase of the confined aquifer thickness. Based on the numerical analysis, a fit relationship was established to predict the maximum ground settlements of deep excavation in Shanghai considering the excavation depth, groundwater drawdown and distribution of multilayered aquifers. The applicability of the fit equation was verified by field measurements.

中图分类号:

P641

. 多含水层中开挖降水作用下的圆形深基坑流固耦合分析及地层分布影响研究[J]. J Shanghai Jiaotong Univ Sci, 2026, 31(2): 475-485.

Yan Yueheng, Li Mingguang, Xu Zhonghua, Pan Chunhui. Effect of Stratum Distribution on Deep Circular Excavation with Dewatering Above a Multi-Aquifer System by Hydro-Mechanical Coupled Numerical Analysis[J]. J Shanghai Jiaotong Univ Sci, 2026, 31(2): 475-485.

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多含水层中开挖降水作用下的圆形深基坑流固耦合分析及地层分布影响研究

Effect of Stratum Distribution on Deep Circular Excavation with Dewatering Above a Multi-Aquifer System by Hydro-Mechanical Coupled Numerical Analysis

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