Shed-pipe grouting technique application in shallow-buried and lateral pressure tunneling

Reinforce mechanism and application of shed-pipe grouting in stratum-broken tunnel excavating is studied.Taking the weathering and broken belt of a tunnel exit as an example,we obtain a conclusion that shed-pipe grouting in the process of soft stratum tunnel excavating can notably improve stratum characteristics of physical mechanics,reduce stress concentration and heighten entire stability of tunnel itself through FEM simulation of tunneling load and deformation on the conditions of the two different measures with shed-pipe and without shed-pipe.