中南大学学报（自然科学版）2017，Vol.48Issue(6)：1568-1576,9.DOI:10.11817/j.issn.1672-7207.2017.06.021
高地应力下地下厂房围岩破坏特征及地质力学机制
Geomechanics mechanism and characteristics of surrounding rock mass failure for underground powerhouse under high geostress
摘要
Abstract
Combined with the previous geological exploration,geological record during the construction and some other construction information,the cracking and deformation characteristics of the surrounding rock and supporting structure of Houziyan hydropower station were analyzed,and the geomechanics mechanism of surrounding rock deformation and failure was researched.Some corresponding engineering response measures for the subsequent excavation and support were put forward.The results show that the failure of surrounding rock in main powerhouse is mainly stress-driven,and essentially caused by high geostress and low strength stress ratio.In the sidewall between the rock anchor beam and spandrel of upstream and downstream in the main powerhouse,the tangential stress loading effect is obvious due to the stress magnitude and its direction,and the surrounding rock is easy to pressure-induced splitting.This explained why the surrounding rock mass of this area is easy to be damaged.关键词
高地应力/岩石力学/围岩劈裂/地质力学机制/猴子岩水电站Key words
high geostress/rock mechanics/surrounding rock splitting/geomechanics mechanism/Houziyan Hydropower Station分类
建筑与水利引用本文复制引用
李志鹏,徐光黎,董家兴,储汉东,王金生,陈春文..高地应力下地下厂房围岩破坏特征及地质力学机制[J].中南大学学报（自然科学版）,2017,48(6):1568-1576,9.基金项目
国家自然科学基金资助项目(41472263) （41472263）
中国水电工程顾问集团公司科研项目(P099) (Project(41472263) supported by the National Natural Science Foundation of China （P099）
Project(P099) supported by China Hydropower Engineering Consulting Group) （P099）
