Abstract:Based on an engineering case,the mechanism of the pre-support system applied in treatment for the collapse of shallow-buried tunnel is discussed. Moreover,the internal force of the second lining is analyzed by means of FEM and the procedure to treat the collapse of shallow-buried tunnel is given. Some conclusions can be drawn based on the treatment effectiveness:(1) shed-pipe grouting technology is an effective assistant construction method,and the mechanical effect is significant;(2) the deformation of the tunnel bedding wall rock often has some abruptness;and (3) the second lining should be constructed in time so as to form the closed-end supporting system earlier,which can accelerate the stabilization process of the deformation of surrounding rock and prevent the excessive deformation of surrounding rock and tunnel collapse.