复杂地质条件下的地下洞室群施工期围岩稳定分析  

Surrounding Rock Stability Analysis of Underground Caverns under Complex Geological Conditions during Construction Period

作　　者：曾继坤 彭强 陈熠 王振红[3] ZENG Jikun;PENG Qiang;CHEN Yi;WANG Zhenhong(Huadian Fuxin Zhouning Pumped Storage Co.,Ltd.,Ningde 352100,Fujian,China;PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang,China;Structural Material Institute,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]华电福新周宁抽水蓄能有限公司,福建宁德352100 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]中国水利水电科学研究院结构材料所,北京100038

出　　处：《水力发电》2019年第11期62-66,88,共6页Water Power

基　　金：国家自然科学基金资助项目(51709281)

摘　　要：地下洞室群施工建设过程中,特别是复杂地质条件下的地下洞室群,洞室开挖对围岩产生强烈扰动,造成巨大卸荷效应,对围压稳定有较大影响,关系工程的安全。以周宁抽水蓄能电站地下厂房洞室群为依托,从岩体地质条件及洞室布置实际出发,按照施工组织设计需要拟定的分层开挖及支护方案,对地下洞室群建立三维模型,采用弹塑性有限元法进行数值计算,研究设计方案下围岩的稳定性以及支护措施有效性。During the construction of underground caverns,especially in complex geological conditions,the excavation of underground caverns has a strong disturbance on surrounding rock,which results a huge unloading effect.This problem has a great impact on the stability of confining pressure and is related to the safety of project.Taking the excavation of underground caverns in Zhouning Pumped-storage Power Station as study object,the 3D model of underground caverns is constructed based on the geological conditions,actual layout of caverns and designed layered excavation and supporting scheme,and the elastic-plastic finite element method is used to perform numerical calculations to verify the stability of surrounding rock under design scheme and the effectiveness of support measures.

关 键 词：地下洞室群 围岩稳定性 支护措施 弹塑性有限元法 

分 类 号：TU457[建筑科学—岩土工程] TU257[建筑科学—土工工程]