摘要
为了分析评价隧道爆破开挖对洞口段边坡稳定性的影响,以武靖高速矮子寨隧道工程为依托,采用FLAC3D软件建立了相应数值分析模型模拟隧道爆破开挖施工过程,计算分析了爆破施工对洞口段边坡稳定性的影响规律。研究结果表明:隧道爆破施工产生的振动效应会极大降低隧道洞口段边坡的安全系数,并且会增大边坡地表位移沉降;锚杆支护有助于提高振动荷载作用下处于失稳状态的边坡稳定性。
In order to analyze and evaluate effect of tunnel blasting during excavation on the slope stability of portal section, a corresponding numerical model was established with FLAC3D software lor the tunnel project of Wu-Jing highway to simulate the process of tunnel excavation by blasting and analyze the effect of blasting excavation on the slope stability of portal section. Results showed that the vibration effect caused by blasting excavation would remarkably reduce the safety factor of slope of tunnel portal section and exacerbate the displacement and subsidence of slope surface. And anchor support could help improve the stability of unstable slope under vibration loads.
出处
《矿冶工程》
CSCD
北大核心
2017年第1期25-28,共4页
Mining and Metallurgical Engineering
关键词
隧道
爆破开挖
边坡稳定性
锚杆支护
数值模拟
tunnel
blasting excavation
slope stability
anchor support
numerical simulation
