引洮7#隧洞TBM开挖与管片衬砌支护过程的三维数值分析

Yintao 7# tunnel TBM excavation and segment lining and supporting process three-dimensional numerical analysis

结合引洮供水工程资料,采用有限元D-P屈服准则和ANSYS软件中的单元"生死"技术对隧洞的开挖和管片衬砌支护过程进行三维数值模拟。分析了开挖前后围岩的应力与变形情况、开挖不同阶段围岩的应力与变形和管片衬砌的等效应力情况。分析表明,开挖过程中围岩和管片应力与变形随开挖时间和空间不断变化,初始围岩应力对隧洞围岩和管片的应力与变形的影响较大,这为今后管片设计和隧洞施工提供了数据参考和依据。

Combining Yintao water supply project7 # tunnel,using D-P yield and ANSYS software of the unit＂birth and death＂technology for tunnel excavation and segment lining and supporting process 3-d numerical simulation to analyze the stress and deformation of the surrounding rock before and after the excavation,at different stages of surrounding rock stress and deformation and Von Mises of the segment lining. Analysis shows that the deformation and stress of surrounding rock and lining segments in the process of excavation with the excavation space and time changing,stress of initial rock stress of surrounding rock and lining segments change are bigger,the segment design and tunnel construction provide the data for the future reference and basis.