STRUCTURE FOR PREVENTING FLOW IMPEDIMENT OF UNDERGROUND WATER BY SHIELD TUNNEL, LINING BODY, AND SHIELD TUNNEL

摘要

PROBLEM TO BE SOLVED: To provide a flow impediment structure that can prevent flow impediment of underground water by eliminating a mud cake layer. SOLUTION: The structure 1 for preventing flow impediment of underground water comprises a lining body 5 laid at the inner peripheral part of a shield tunnel 3; an opening 7 provided so as to penetrate the lining body 5; a water passing means 9 provided in the opening 7 and detachably insertable into the opening 7; and a washing device 11 for washing a solid-liquid separator 19 of the water passing means 9. The water passing means 9 is mounted into the opening 7 with bolts and nuts 15 so that the inner peripheral surface of the water passing means 9 projects from a back-filling material 13. COPYRIGHT: (C)2009,JPO&INPIT