基于数值模拟的断层破碎带隧道注浆方案优选分析
Optimization Analysis of Grouting Fault Fracture Zone Tunnel Based on Numerical Simulation
张玉印1
作者信息
- 1. 中国铁建昆仑投资集团有限公司,四川 成都 610040
- 折叠
摘要
断层破碎带会引发隧道突水突泥等地质灾害,在造成人员伤亡的同时,还会造成经济损失和工期延误.为解决断层破碎带在隧道施工过程中的突涌水问题,以大凉山1号隧道断层破碎带为工程背景,根据工程地质条件与水文地质特性将隧道划分为不同的风险等级,并提出采用纯水泥浆或水泥-水玻璃双浆注浆材料对不同风险等级的隧道段分别采用开挖后周边注浆、周边深孔预注浆、全断面深孔预注浆的注浆措施.此外,采用COMSOL软件建立注浆后的数值模型,以研究隧道应力及注浆后的渗流变化规律.研究结果显示,注浆有效缓解了应力集中现象,同时也减少了渗流集中现象,从而降低了施工过程中隧道突涌水的发生率.
Abstract
Geological disasters of water and mud inrush of tunnels occur in fault fracture zones,which may cause not only casualties but also economic losses and construction time delays.In order to solve the problem of sudden water inrush during tunnel construction,the fault fracture zone of No.1 Tunnel,Daliangshan,is taken as an example.Ac-cording to the engineering geological conditions and hydrogeological characteristics,the tunnel is divided into dif-ferent risk levels.The pure water slurry or cement-water glass double slurry grouting materials were applied in dif-ferent risk levels of tunnel sections by grouting measures such as post excavation peripheral grouting,peripheral deep hole pre grouting and full section deep hole pre-grouting.In addition,a numerical model is established by COMSOL software to study the changing law of tunnel stress and seepage after grouting.The research results show that grouting effectively alleviates stress concentration and reduces seepage concentration so that thereby reducing he incidence of sudden water inrush can be reduced in tunnels during construction.
关键词
隧道工程/断层破碎带/数值模拟/注浆加固Key words
tunnel engineering/fault fracture zone/numerical simulation/grouting reinforcement引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据