施工技术(中英文)
88
CONSTRUCTION TECHNOLOGY
D0I: 10.7672/sgjs2023090088
基于流固耦合效应的高地应力软岩大变形隧道
开挖稳定性分析
*
2023
年5月上
第52卷第9期
罗春雨",钱志豪
²,
刘富华
²,
康海波",杜
明
（1.四川公路桥梁建设集团有限公司公路隧道分公司，四川成都610200；
2.
西南交通大学土木工程学院，四川成都610031)
【摘要】隧道施工过程中存在多场耦合效应问题，需研究耦合效应的影响。以蓝家岩隧道为工程背景，建立三维数
值模型，基于流固耦合和不耦合工况，对比分析隧道施工过程中变形特征、初期支护受力特性及地层孔隙水压力变
化规律。研究结果表明，考虑耦合效应下，隧道拱部沉降、洞周水平位移、底部隆起均较大；不考虑和考虑流固耦合
效应下围岩与初期支护接触应力均为压应力，且分布特征相似，考虑流固耦合效应下围岩压力大于不考虑流固耦
合效应下的围岩压力，高地应力软岩隧道施工时考虑流固耦合效应可更真实地反映支护结构受力状态；隧道开挖
过程中围岩孔隙水压力增大，地下水易在隧道拱腰至拱脚位置涌出，需合理设计排水措施，并在拱底处进行降水。
【关键词］隧道;围岩；地应力；流固耦合；监测；数值模拟
[
中图分类号]
U45
Stability Analysis of Large Deformation Tunnel Excavation
in Soft Rock with High Ground Stress Based on
Fluid-solid Coupling Effect
LUO Chunyu', QIAN Zhihao², LIU Fuhua², KANG Haibo', DU Ming',
TAN Xiaojun', YANG Wenbo?
(1. Branch of Road Tunnel, Sichuan Road and Bridge Construction Co., Ltd., Chengdu, Sichuan 610200, China;
2. School of Civil Engineering , Southwest Jiaotong University , Chengdu, Sichuan 610031, China)
Abstract: The problem of multi-field coupling effect exists in the tunnel construction process and it
should be studied. Using the Lanjiayan Tunnel as the engineering background, a 3D numerical model is
established to compare and analyze the deformation characteristics, initial support force characteristics
and pore water pressure changes during the tunnel construction process based on fluid-solid coupled and
uncoupled conditions. The research results show that the settlement of the tunnel arch, horizontal
displacement around the cavern and bottom uplift are larger when the fluid-solid coupling effect is
considered. The contact stress between the surrounding rock and the initial support is compressive stress
with or without considering the fluid-solid coupling effect, and the distribution characteristics are similar.
The surrounding rock pressure with the fluid-solid coupling effect is greater than that without considering
the fluid-solid coupling effect. Considering the fluid-solid coupling effect during the construction of high
ground stress soft rock tunnel can reflect the force state of the support structure more realistically. During
the tunnel excavation process, the pore water pressure in the surrounding rock will increase, and
groundwater will easily gush out from the arch waist and the arch foot, which requires reasonable design
of drainage measures at the inverted arch.
*
国家自然科学基金（51678499）
【作者简介］罗春雨，高级工程师,
E-mail
：suidao@tunnel-co.cn
【通信作者］杨文波，博士，教授，
E-mail:yangwenbol179@hotmail.com
[
收稿日期] 2023-01-08
明"，谭小军"，杨文波
[
文献标识码]
A
[
文章编号】2097-0897(2023)09-0088-07
2023 No.9
Keywords : tunnel ; surrounding rock ;ground stress ;fluid-solid coupling;monitoring; numerical simulation
0
引言
隧道所处的不良地质环境（如高水压、高地应
力、高烈度、岩溶等）对工程施工有显著影响，水是
引起地下工程施工困难的重要因素。地下水会改
变岩体所受的应力状态和物理力学性质，从而影响
隧道周围岩体稳定性，增加隧道变形，甚至导致隧
道跨塌，使隧道施工力学过程更复杂[ 1-2]
隧道施工过程中存在流固耦合效应问题,对地
下工程施工的大多数研究常忽略耦合效应的作用，
而大量工程实践表明在地下岩土体开挖过程中进
行流固耦合效应分析是有必要的[ 3-8] 。高新强等[ 9]
以圆梁山隧道工程为背景,开展相似模型试验，对
比分析了隧道施工时有无注浆圈对渗流场变化规
律的影响,研究结果表明，注浆圈的施伌㺖䵏N
了衬砌背后的水压力。谭忠盛等[ 10] 采用模型试验
及现场测试相结合的方法，验证了全封堵条件下注
浆圈并不能有效减小衬砌背后水压力。李明等[ 1]
基于流固耦合和
基于流固耦合效应的高地应力软岩大变形隧道开挖稳定性分析（论文）.pdf
