[1]李坤鹏,陈士海,叶刚楠,等.基坑开挖引起地下连续墙水平位移与地表沉降数值模拟[J].华侨大学学报(自然科学版),2025,46(3):264-271.[doi:10.11830/ISSN.1000-5013.202411014]
　LI Kunpeng,CHEN Shihai,YE Gangnan,et al.Numerical Simulation on Horizontal Displacement of Diaphragm Wall and Surface Settlement by Foundation Pit Excavation[J].Journal of Huaqiao University(Natural Science),2025,46(3):264-271.[doi:10.11830/ISSN.1000-5013.202411014]
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基坑开挖引起地下连续墙水平位移与地表沉降数值模拟()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第46卷
期数:
2025年第3期
页码:
264-271
栏目:
出版日期:
2025-05-20

文章信息/Info

Title:
Numerical Simulation on Horizontal Displacement of Diaphragm Wall and Surface Settlement by Foundation Pit Excavation
文章编号:
1000-5013(2025)03-0264-08
作者:
李坤鹏1;  陈士海1;  叶刚楠2;  陈韦羽3;  陈建福4
1. 华侨大学 土木工程学院, 福建 厦门 361021;2. 福建铭泰集团有限公司, 福建 厦门 361000;3. 福建永旺建设集团有限公司, 福建 龙岩 364000;4. 中铁十四局集团大盾构工程有限公司, 江苏 南京 210000
Author(s):
LI Kunpeng1;  CHEN Shihai1;  YE Gangnan2; CHEN Weiyu3;  CHEN Jianfu4
1. College of Civil Engineering, Huaqiao University, Xiamen 361021, China; 2. Fujian Mingtai Group Limited Company, Xiamen 361000, China; 3. Fujian Yongwang Construction Group Limited Company, Longyan 364000, China; 4. China Railway 14 Bureau Group Great Shield Engineering Limited Company, Nanjing 210000, China
关键词:
基坑工程;  三维有限元模型;  地下连续墙水平位移;  地表沉降;  修正剑桥本构模型
Keywords:
foundation pit engineering;  3-dimensional finite element model;  horizontal displacement of diaphragm wall;  surface settlement;  modified Cambridge constitutive model
分类号:
TU478
DOI:
10.11830/ISSN.1000-5013.202411014
文献标志码:
A
摘要:
为准确分析地下连续墙水平位移与地表沉降规律,利用数值模拟结合现场实测的方法,对基坑开挖变形进行系统研究。建立基坑开挖的三维有限元模型,采用修正剑桥本构模型,计算基坑开挖引起的地下连续墙水平位移与坑外地表沉降。同时,引入Pasternak双参数模型,推导挠曲微分方程并利用有限差分法计算地下连续墙水平位移。将数值模拟结果与现场实测数据,以及理论计算结果进行对比,验证数值模拟的合理性。利用数值模拟的方法进一步研究地下连续墙,内支撑等对水平位移与地表沉降的影响规律。研究结果表明:增大地下连续墙厚度、地下连续墙弹性模量、钢支撑直径能够有效减小地下连续墙水平位移与地表沉降;基坑变形具有显著的空间效应,具体表现为距离坑角20 m内,地下连续墙水平位移与地表沉降随着离坑角距离的增大而增大,20~100 m地下连续墙水平位移与地表沉降保持不变。
Abstract:
To accurately analyze the horizontal displacement of the diaphragm wall and surface settlement, a systematic study on the deformation of the foundation pit was conducted using numerical simulation combined with field measurement method. A 3-dimensional finite element model of the foundation pit excavation was established, adopting a modified Cambridge constitutive model to calculate the horizontal displace-ment of the diaphragm wall and the surface settlement outside the pit by the foundation pit excavation. The Pasternak 2-parameters model was introduced, the bending differential equation was derived, the finite difference method was used to calculate the horizontal displacement of the diaphragm wall. The numerical simulation results were compared with the field measurement data and the theory calculation results to verify the numerical simulation. The numerical simulation method was used to further investigate the influence of the diaphragm wall and internal supports, etc on horizontal displacement and surface settlement. The research results show that increasing the thickness of the diaphragm wall, the elastic modulus of the diaphragm wall, steel support diameter could effectively reduce the horizontal displacement of the diaphragm wall and surface settlement. The deformation of the foundation pit exhibits significant spatial effects, within 20 m from the corner of the pit, the horizontal displacement of the diaphragm wall and surface settlement increase with the distance from the corner of the pit; within 20-100 m, the horizontal displacement and surface settlement remain unchanged.

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备注/Memo

备注/Memo:
收稿日期: 2024-11-02
通信作者: 陈士海(1964-),男,教授,博士,博士生导师,主要从事岩土工程防灾减灾的研究。E-mail:cshblast@163.com。
基金项目: 福建省住建行业科技计划项目(2022-K-292)https://hdxb.hqu.edu.cn/
更新日期/Last Update: 2025-05-20