INFLOW REDUCTION METHOD FOR TRANSITION ZONE BTWEEN CUT AND COER BORED TUNNEL

摘要

PURPOSE: An inflow water processing method in a connection part between an open cut structure and an underground tunnel structure is provided to reduce water leakage in a connection part of the structure by effectually preventing subsurface water from being infiltrated into the connection part of the open cut structure and the underground tunnel structure. CONSTITUTION: An inflow water processing method in a connection part between an open cut structure and an underground tunnel structure comprises following steps. A waterproof sheet is connected to an inclined upper side of a finish wall(120) of an open-cut box structure. A connection part of the waterproof sheet is covered with a waterproof film protective layer(400) including plain concrete. An influent water cutoff layer(500) including soil cement is formed on the upper part of the waterproof film protective layer and the box structure(100).