GROUNDWATER OR SEDIMENT SPILL PREVENTION DEVICE FOR TUNNEL EXCAVATION

摘要

The present invention relates to a device to prevent an outflow of underground water or soil for a tunnel excavation and, more specifically, relates to a device to prevent an outflow of underground water or soil for tunnel excavation capable of preventing a land subsidence phenomenon caused by the outflow of underground water or soil through a gap between a tunneling machine of a discharge unit and a tunnel when excavating the tunnel using the tunneling machine. According to the present invention, the device to prevent the outflow of the underground water or soil for tunnel excavation comprises: a coupling adapter buried in an inner wall of the discharge unit of a vertical tunnel, having a coupling flange on a front end, and formed into a hollow reinforcing body (12) to enable the tunneling machine to penetrate through; and an outflow preventing member coupled to the coupling adapter, preventing a gap between the tunnel and the tunneling machine by applying a water pressure to the discharge unit.