对浅埋黄土隧道开挖中围岩变形的数值模拟分析

针对西北地区某黄土隧道浅埋开挖现象,结合现场工程地质勘察和岩石力学试验,并运用有限单元法,使用MI-DAS/GTS数值模拟软件,对其进行了详细的分析和研究。通过研究,对该隧道围岩位移和应力变化规律做出了客观评价,为隧道下一步的施工方案、监测方案的制定提供决策依据,对实际施工有着重要的指导意义。

Numerical Simulation Analysis of Surrounding Rock Deformation in Shallow-Buried Loess Tunnel Excavation

In allusion to the phenomenon of excavating a shallow-buried loess tunnel in the northwest region, combined with the engineering geological prospecting and rock mechanics test, the paper implements the detailed analysis and research using finite element method and MIDAS/GTS numerical simulation software. Through the research, the change rule of displacement and stress of the surrounding rock is estimated objectively, which provides decision basis for the establishment of tunnel construction and monitoring scheme in the next step. It has important guiding significance for actual construction.