摘要
围绕开挖及施工方案对一般质量岩石隧道稳定性的影响展开研究。考虑隧道施工过程中有无支护安装与支护安装不同时机两个因素,制定施工方案。基于Hoek-Brown准则,进行隧道施工方案的FLAC3D数值模拟,探究基于收敛约束原理的隧道围岩稳定性分析。结果表明,考虑有无支护安装这一因素对隧道纵向特性曲线的形态及特征有重要影响。在考虑无支护安装的条件下,纵向特性曲线的形态及特征在不同开挖条件下的差异并不明显。考虑有无支护安装与支护安装不同时机,对围岩安全系数的影响并不大。
The impact of excavation and construction methods on the stability of tunnels with general quality rock is studied.The construction plans are developed,taking into account two factors during tunnel construction:the installation of support and the time of support installation.Based on the Hoek-Brown criteria,numerical simulations of tunnel construction plans are performed using the FLAC3D to investigate the stability of the surrounding rock of tunnels based on the convergence constraint principle.The results indicate that the factor of whether or not support is installed has a significant impact on the shape and characteristics of the longitudinal characteristic curve of the tunnels.Under the condition of considering no support installation,the differences in the shape and characteristics of the longitudinal characteristic curve under different excavation conditions are not significant.Considering the time of support installation and whether or not support is installed does not have a significant impact on the safety factor of the surrounding rock.
作者
虞永杰
张麟
宋泽仁
郎晓明
高沛沛
苏雅
YU Yongjie;ZHANG Lin;SONG Zeren;LANG Xiaoming;GAO Peipei;SU Ya(Zhoushan Transportation Engineering Management Center,Zhoushan 316100,China;Zhejiang Yong-Zhou Phase I Expressway Company,Zhoushan 316100,China;Zhoushan Bridge Construction Management Center,Zhoushan 316100,China;Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2023年第S02期284-287,共4页
Chinese Journal of Geotechnical Engineering
关键词
隧道
开挖
收敛约束法
纵向变形曲线
支护安装时机
tunnel
excavation
convergence confinement method
longitudinal displacement profile
support installation time
