地下圆形洞室塑性回填效应的解析

Analysis of Plastic Backpacking Effect in Underground Circular Tunneling

本文对洞壁和衬砌间采用塑性材料回填的地下圆形隧道,由莫尔-库仑(Mohr-Coulomb)屈服准则,求得岩体、塑性回填材料与衬砌的内力及位移场的解析解。由某工程的计算值与实测值的符合程度表明,采用某种低模量的回填材料回填的方法,可以有效地减少衬砌的应力与位移。说明在一定条件下,这是一种有前途的工程措施。

In this paper, based on the Mohr-Coulomb yield criterion, a complete analytical solution of stress and displscement field is presented for underground circular tunneling with flexible compressible plastic material filled between chamber rock and liner. The measured and calculated value of stresses or displacements is consistent satisfactorily for the practical engineering. It is a promising engineering method to fill the plastic material between chmber rock and liner for underground circular tunneling.