某水电站地下厂房围岩稳定性及加固效果评价

陈曦; 吴英姿; 肖诗荣; 柴子晗; 姜晓玲; 郭飞

doi:10.13928/j.cnki.wrahe.2025.S1.054

水利水电技术（中英文） ›› 2025, Vol. 56 ›› Issue (S1) : 351 -358. DOI: 10.13928/j.cnki.wrahe.2025.S1.054

工程基础

某水电站地下厂房围岩稳定性及加固效果评价

陈曦 ¹ ,
吴英姿 ¹ ,
肖诗荣 ²^,³ ,
柴子晗 ²^,³ ,
姜晓玲 ²^,³ ,
郭飞 ²^,³

作者信息 +

Evaluation of stability and reinforcement effect of surrounding rock of the underground powerhouse of a hydropower station

Xi CHEN ¹ ,
Yingzi WU ¹ ,
Shirong XIAO ²^,³ ,
Zihan CHAI ²^,³ ,
Xiaoling JIANG ²^,³ ,
Fei GUO ²^,³

Author information +

文章历史 +

PDF (17361K)

摘要

地下洞室围岩稳定性关系到地下工程的施工安全和地下建筑物后期的安全运行。以施工地质工作中的围岩类别校核和块体稳定性分析为基础，对西南某地下厂房围岩稳定性进行评价。并通过施工期围岩位移监测数据与FLAC^3D数值模拟成果的对比分析，对厂房围岩加固效果进行评价。评价结果表明，地下厂房围岩以Ⅱ类、Ⅲ类围岩为主，占比96%,Ⅳ类仅占4%,且由于加固及时，施工过程中未发生10 m³以上较大规模块体塌落现象，围岩稳定性总体较好。地下厂房围岩顶拱位移为毫米量级，顶拱围岩加固效果良好。边墙位移为厘米量级，边墙围岩加固效果较好。比较而言，顶拱加固效果比边墙加固效果好。研究成果对同类项目具有参考借鉴意义。

Abstract

The stability of surrounding rock of underground cavern is related to the construction safety of underground engineering and the safe operation of underground buildings in the later stage. The stability of surrounding rock of an underground powerhouse in southwest China is evaluated based on the type check of surrounding rock in construction geology and the analysis of block stability. And through the comparison and analysis of the displacement monitoring data of surrounding rock during construction period and the result of FLAC^3D numerical simulation, the reinforcement effect of surrounding rock is evaluated. The evaluation results show that the surrounding rock of the underground powerhouse mainly consists of class Ⅱ and Ⅲ surrounding rock, accounting for 96%, and class Ⅳ only accounts for 4%. Moreover, due to timely reinforcement, large-scale block collapse of more than 10 m³ did not occur during construction, and the surrounding rock stability is generally good. The displacement of the top arch of the surrounding rock of the underground powerhouse is millimeter, and the reinforcement effect of the top arch surrounding rock is good. The displacement of side wall is in the order of cm, and the reinforcement effect of side wall surrounding rock is preferable good. Comparatively speaking, the reinforcement effect of the top arch is better than that of the side wall. The research results can be used as reference for similar projects.