Numerical Simulation on the Yawing Performance of Grouting Steel Pipe in Exempt-incision Entrance Technology

Abstract

Abstract. The exempt-incision entrance technology of rock mass reinforced by grouting steel pipe is a new entrance and defense technology. By applying dynamic 3-D ANSYS/LS-DYNA10.0, this article simulated the process of GBU-28 normally penetrating into rock mass reinforced by grouting steel pipe. The analysis result proved that the grouting steel pipe contributes well to the yawing of the projectile, which can reduce the projectile's penetration depth and obviously improve the defense performance of the tunnel entrance. This technology will be widely used in defense engineering.