| 摘要 |
<P>PROBLEM TO BE SOLVED: To propose a tunnel water cut off structure that prevents water flow in the axial and circumferential directions of a tunnel on the tunnel lining rear surface, and allows an area to be repaired to be limited to a relatively small area even if a waterproof sheet breaks. <P>SOLUTION: The tunnel structure 1 includes a plurality of lateral weirs 2 formed at intervals in the axial direction of the tunnel T and a plurality of longitudinal weirs 3 formed at intervals in the circumferential direction of the tunnel T. The lateral weir 2 and longitudinal weir 3 are formed with a hardening body 7 pressed in between a waterproof sheet 5 and the outer circumferential surface of a secondary lining concrete 4 of the tunnel T, the lateral weir 2 preventing ground water from moving in the axial direction of the tunnel T along the waterproof sheet 5, the longitudinal weir 3 preventing ground water from moving in the circumferential direction of the tunnel T along the waterproof sheet 5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
