摘要
为了有效控制高地应力作用下隧道施工过程中的围岩变形,以某水电站为例,通过应用FLAC3D数值模拟软件,对主厂房硐室开挖后预应力锚杆支护前后的围岩变形进行模拟。同时,结合现场主厂房开挖支护后硐室围岩收敛变形实验数据,探讨隧道开挖过程中围岩变形特点及采用预应力锚杆支护前后硐室围岩位移变化规律。研究发现,预应力锚杆支护可以有效抑制围岩变形,改善围岩受力条件,在一定程度上保障了施工安全,并为施工过程中锚杆参数的合理选取提供了一定依据。
In order to effectively control the deformation of surrounding rock during tunnel construction under high ground stress,taking a hydropower station as an example,the deformation of surrounding rock before and after the excavation of the main powerhouse chamber is simulated by using FLAC3D numerical simulation software,and the deformation of surrounding rock during tunnel excavation is discussed by combining with the experimental data of convergence deformation of surrounding rock after the excavation of the main powerhouse chamber.It is found that the prestressed bolt support can effectively restrain the deformation of surrounding rock,improve the stress conditions of surrounding rock,ensure the construction safety to a certain extent,and provide a certain basis for the reasonable selection of bolt parameters in the construction process.
作者
高强
GAO Qiang(Xinjiang Yili River Basin Development and Construction Administration,Yining 835000,Xinjiang,China)
出处
《水利科技与经济》
2021年第8期63-69,共7页
Water Conservancy Science and Technology and Economy
关键词
围岩变形
预应力锚杆
FLAC3D数值模拟
收敛变形
surrounding rock deformation
prestressed anchor
FLAC3D numerical simulation
convergence deformation
