地下厂房洞室块体识别与稳定分析  

Identification and Stability Analysis of Blocks in Underground Powerhouse

作　　者：方金政 肖明[1] FANG Jinzheng;XIAO Ming(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 470072,Hubei,China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉470072

出　　处：《水力发电》2021年第1期54-58,共5页Water Power

基　　金：国家重点基础研究发展计划(973计划)项目(2015C-B057904);国家自然科学基金资助项目(51579191)。

摘　　要：块体失稳在岩土工程中是一种常见的破坏形式,直接影响到地下结构的安全。在关键块体理论基础上,引入单元重构与聚合建模方法,自编程序实现关键块体的识别与定位,采用刚体极限平衡法计算块体安全系数评价块体稳定性。某水电工程地下厂房在无支护条件与系统支护条件下的块体分布及安全稳定性分析结果表明,厂区存在较多不稳定块体,对工程安全有一定危害;采用系统锚固支护措施后,关键块体的安全系数均有所提高。The instability of rock blocks is one of failure modes in geotechnical engineering,which will directly affect the safety of underground structures.Based on the key block theory and the method of element reconstruction and aggregation technique,the identification and positioning of key blocks are realized by self-programming,and the rigid limit equilibrium method is used to calculate the safety factors of blocks for evaluating block stability.The block distribution and stability of the underground powerhouse of a hydropower project under non-support condition and support condition are analyzed respectively,and the results show that there are many unstable blocks in powerhouse area,which is harmful to the safety of the project,and the safety factors of key blocks are improved with the systemic anchoring support measure.

关 键 词：地下洞室 稳定性评价 结构面 关键块体 刚体极限平衡法 

分 类 号：TU457[建筑科学—岩土工程]