隧洞位移的弹性空间有限元反分析研究

Inverse Analysis on Elastic 3-Dimentional Finite Element Method of Tunnel Displacement

针对地下洞室,本文提出了一种借助弹性空间有限元计算的位移反分析法——相对位移反分析法。该方法不仅可以模拟测点位移释放的过程,而且还能反映位移量测的真实情况,合理地考虑掌子面对围岩变形的空间效应影响。运用这种方法对二滩蒿草湾隧道进行了位移反分析,所得结果较为合理。

In view of underground cavern the paper presents an inverse displacement analysis method by means of elastic spatial finite element calculation——inverse analysis method of relative displacement. This method can not only simulate the release process of measuring point displacement, but also reflect the actual condition of displacement measuring, rationally estimate influence of space effect from driving face on surrounding rock deformation . The result is more reasonable by use the method for Haocaowan tunnel of Ertan Project.