软弱围岩隧道开挖的有限元模拟

FEM Simulation of Tunnel Excavation of Soft and Weak Wall Rocks

采用非线性有限元数值模拟的方法,对软弱围岩隧道施工进行了数值分析.利用大型通用软件ANSYS提供的单元生死功能和隐式蠕变方程,就隧道上下台阶法施工作业方式进行了二维弹-粘塑性分析,并进行模拟,所揭示的规律能为工程施工提供依据和指导.

This paper carries out analysis on the numerical values in the construction of soft and weak rock tunnel by means of nonlinear FEM numerical value simulation method. Besides, by means of element active/kill function and implicit creep equation provided in the large general software ANSYS, it analyzes and simulates the top and bottom benching tunneling construction in terms of elastic visco - plasticity. It also uncovers some principles that can be used to provide bases and theoretical guides to engineering construction.