地下岔洞开挖的三维弹塑性有限元分析

Study on the Excavation of Underground-Bifurcated Tunnels by 3-D Elasto-Plastic FEM

应用弹塑性有限元法对初始地应力场、洞室开挖等效应对地下岔管围岩的应力、位移和稳定的影响进行了数值模拟分析 ;并结合实际工程 。

By use of three dimensional elasto plastic FEM, the thesis simulates and analyzes the influences of initial geotectonic stress field and tunnel excavation on the mechanical behavior of the rock mass around bifurcated tunnels. As an example, the stress, displacement, and yielding area distributions of the adjoined rock around the underground bifurcated tunnel in Wanjiazhai Yellow river water diversion project are presented.