深埋超大跨度地下洞室围岩稳定性研究  

Study on stability of surrounding rock of deep buried super-large underground cavern

作　　者：杨克克 YANG Keke(North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]华北水利水电大学,河南郑州450045

出　　处：《四川建材》2020年第3期71-73,共3页Sichuan Building Materials

摘　　要：在深埋超大跨度地下洞室的开挖过程中,若支护方式和开挖方法不合理,易导致坍塌、大变形等失稳破坏现象,保证洞室的稳定性是施工过程中的核心任务,而现阶段国内外尚无明确标准对于地下洞室的稳定性定量分析,本文采用强度折减法对于深埋超大跨度洞室围岩稳定进行理论研究,得到了不同围岩等级下的安全系数,并对地下洞室破坏形态进行研究,为支护设计提供参考。In the process of excavation of deep buried large-span underground caverns,if the support method and excavation method are unreasonable,it will easily lead to instability and damage such as collapse and large deformation.Ensuring the stability of the cavern is a core task in the construction process.At present,there is no clear standard at home and abroad for the quantitative analysis of the stability of underground caverns.In this paper,the strength reduction method is used to study the stability of surrounding rock of deep-buried super-long span caverns,and the safety factor under different surrounding rock grades is obtained.And research on the failure mode of underground caverns,and provide reference for support design.

关 键 词：大跨度洞室 强度折减法 围岩稳定性 破坏形态 

分 类 号：TU457[建筑科学—岩土工程]