Research on the Effect of Different Modulus Characteristic of the Surrounding Rock to the Stress and Deformation of Roadway Tunnel

The different tensile-compressive modulus is typical characteristic of roadway tunnel rock,however,this characteristic are ignored in the stress analysis of roadway tunnel rock at present,which may induce deviation and bring safety incipient fault to engineering.For this problem,finite element program was coded based on different tensile-compressive modulus theory,and which are used to give the change rule of secondary stress field and displacement field of roadway tunnel rock with different modulus factor α.This result is compared with the result which is induce by classical elastic theory,and the incidence of different modulus factor α is presented,which offer new theoretical base for roadway tunnel support design.