The development of the small pierced test system on the far side of the shield tunnel

Abstract

We should grasp the loose area on far side of tunnel which leakage of water effect in order to frame the repairing plan for the tunnel. We developed the pierced test system by the hydraulic pressure anyone is able to carry. Tip bearing capacity tends to increase on a penetration at any point, as a result of the test it the tunnel which is used by the system. We indicate the result by the pierced test system is appropriate This system seems to be able to grasp what extent the loose area on far side of tunnel is developing.