水力发电2025，Vol.51Issue(1)：74-80,7.
大型地下厂房围岩稳定性及支护措施研究
Research on the Stability and Support Measures of the Surrounding Rock of Large-scale Underground Powerhouse
摘要
Abstract
In order to study the surrounding rock stability problems and the effect of different support measures in the excavation process of large-span,high sidewall underground powerhouse,this paper takes a large hydropower station project in Southwest China as an example,and uses the three-dimensional nonlinear finite element method to analyze the surrounding rock stability of underground powerhouse.The three-dimensional geologic model is established,and the deformation of surrounding rock of underground powerhouse,the change of stress and the distribution law of plastic zone under different support conditions are compared.The results show that,(a)the top arch,bottom plate and corners of the chamber are prone to stress concentration phenomenon,and there is a risk of plastic damage in the blocks cut out of the excavated surface of the chamber;(b)compared with the excavation without support measures,the deformation amount,stress concentration phenomenon and plastic zone distribution of the underground powerhouse after taking support measures are all reduced to different degrees;and(c)the support of sprayed concrete layer+anchor+prestressed anchor cable system has the most significant effect,which is better than that of anchor+prestressed anchor cable support and sprayed concrete layer support in controlling the deformation and damage of surrounding rock.关键词
地下厂房/围岩稳定性/支护措施/变形/应力集中/塑性损伤/有限元法Key words
underground powerhouse/surrounding rock stability/support measures/deformation/stress concentration/plastic damage/finite element method分类
建筑与水利引用本文复制引用
任家辰,张辉,任旭华,张继勋,朱代富,陆嘉伟..大型地下厂房围岩稳定性及支护措施研究[J].水力发电,2025,51(1):74-80,7.基金项目
中央高校基本科研业务费专项资金资助(B2202040-01) （B2202040-01）
云南省重大科技专项计划项目(202102AF080001) （202102AF080001）
