【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。更多还原

【Abstract】 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.更多还原