摘要
地下洞室支护是保证围岩稳定性的重要措施。为研究某水电站地下厂房开挖支护后围岩整体稳定性,并对锚杆间排距进行合理优化,运用有限差分程序FLAC3D,以工程地质资料为基础,建立洞室群工程区三维数值模型,反演初始地应力场,模拟计算并对比毛洞工况及不同支护方案工况围岩变形、应力、塑性区分布情况。结果表明,支护方案能够有效提高地下洞室群整体稳定性,适当增加锚杆间排距对围岩稳定性影响不显著,推荐主厂房边墙选用锚杆间排距1.5 m×1.5 m支护方案。
The support measures of underground caverns are important factors affecting the stability of surrounding rock.In order to study the stability of surrounding rock after excavation and support of an underground powerhouse of a hydropower station and rationally optimize the bolt spacing,a threedimensional numerical model of the engineering area of the cavern group is established by using the finite difference program FLAC3D and based on the engineering geological data to invert the initial geostress field.The distribution of deformation,stress and plastic zone of surrounding rock under tunnel conditions and different supporting schemes is simulated.The results show that the support scheme can effectively improve the stability of underground cavern groups.Proper increase in bolt spacing has no significant effect on the stability of surrounding rock,so this paper recommendes choosing the support scheme of bolt spacing 1.5 m×1.5 m for the side wall of the main powerhouse.
作者
王艳强
刘昌斌
陈焕杰
罗滔
傅少君
WANG Yanqiang;LIU Changbin;CHEN Huanjie;LUO Tao;FU Shaojun(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250014,China;College of Water Resources and Architectural Engineering,Northwest Agricultural and Forestry University,Yangling 712100,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China)
出处
《武汉大学学报(工学版)》
CSCD
北大核心
2024年第S1期30-34,共5页
Engineering Journal of Wuhan University
基金
陕西省青年科技新星项目(编号:2022KJXX-85)
山东电力工程咨询院有限公司科技研发项目(编号:37-K2022-037)
关键词
地下厂房
围岩稳定性
FLAC3D
支护参数优化
underground powerhouse
stability of surrounding rock
FLAC3D
optimization of support parameter
