The Surface Pre-grouting Technology Is Governing In Advance In Tunnel Of Shallow Cover And Oblique Load

It is an important and difficult problem of the tunnel carving safety for every tunnel constructor .The rock of tunnel determinates the tunnel carving safety. So when the rock is bad and the water content is big, it is extremely important of necessary pre-support method .According to Guangfu tunnel of Tianshan highway, the paper carries out the study of pre-support method in the surrounding rock under the status of shallow cover layer and oblique load.Finite element simulation analysis is used to analyze the difference of the grouting and the un-grouting under the status of shallow cover layer and oblique load .Then analyzing the strain and the deformation from the simulation analysis. Contrasting the results of the finite element simulation analysis and the tunnel monitoring control for the estimation of the grouting effect, it is indicated that the grouting case is proper and the reinforce effect is obvious. The study of paper is instructive and worthy of learning.