某工程浅埋大跨度地下厂房围岩块体稳定性分析  

Stability Analysis of the Surrounding Rock for a Shallow-Buried Large Span Underground Powerhouse in a Hydropower Project

作　　者：张学东[1] 王昊[1] 胡剑峰[1] 苏红瑞[1] ZHANG Xuedong;WANG Hao;HU Jianfeng;SU Hongrui(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin,300222)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水利水电工程设计》2024年第2期37-40,共4页Design of Water Resources & Hydroelectric Engineering

摘　　要：通过块体理论对某水电站工程浅埋大跨度地下厂房围岩进行块体稳定性分析,结果表明不稳定块体主要分布于顶拱部位,地下水对块体稳定影响较大;随着地震动参数的增加,块体安全系数会随之降低,但降幅不大;地应力对顶拱块体稳定性影响较大;喷混凝土与锚杆相结合的支护措施对不稳定块体加固效果较好。The block theory is applied to analyze the stability of the surrounding rock for a shallow-buried large-span underground powerhouse in a hydropower project.The results indicate that unstable blocks are primarily distributed in the crown area,and groundwater has a significant impact on block stability.As the seismic parameters increase,the safety factor of the blocks decreases,but the reduction is not substantial.The geostress has a significant impact on the stability of crown blocks.The combined support measures of shotcrete and anchor rods are more effective in reinforcing unstable blocks.

关 键 词：块体稳定性 地下厂房 大跨度 Unwedge软件 

分 类 号：TU457[建筑科学—岩土工程]