开挖顺序对高边墙地下洞室围岩稳定性影响研究  

Study on Influence of Excavation Sequence on Stability of Surrounding Rock of High Side Wall Underground Cavern

作　　者：王知深 李勇[1,2] 朱维申 董振兴[1] WANG Zhi-shen;LI Yong;ZHU Wei-shen;DONG Zhen-xing(Geotechnical & Structural Engineering Research Center,Shandong University,Ji'nan 250061,China;School of Civil Engineering,Shandong University,Ji'nan 250061,China)

机构地区：[1]山东大学岩土与结构工程中心,济南250061 [2]山东大学土建与水利学院,济南250061

出　　处：《价值工程》2019年第1期120-122,共3页Value Engineering

摘　　要：地下洞室群的合理开挖方案对于围岩的稳定性和减少支护成本有着极其重要的意义。以某地下泵站厂房开挖为工程背景,建立了三维计算模型,基于快速拉格朗日法FLAC3D,对三种不同的开挖方案进行了稳定性分析,对分期开挖过程中洞室围岩的应力场、位移场和塑性区的分布规律进行了分析。提出了较优的可变更的施工顺序,为施工设计和现场施工提供了参考依据。The reasonable excavation scheme of underground caverns is of great significance to the stability of surrounding rock and the reduction of support cost.Taking the excavation of an underground pump station as the engineering background,this paper establishes a three-dimensional calculation model.Based on the fast Lagrange method FLAC3D,the stability of three different excavation schemes is analyzed,and the distribution law of stress field,displacement field and plastic zone in the surrounding rock of the tunnel is analyzed.A better and changeable construction sequence is put forward,which provides reference for construction design and site construction.

关 键 词：地下洞室 FLAC3D 数值分析 开挖优化 稳定性分析 

分 类 号：U456.31[建筑科学—桥梁与隧道工程]