WATER PERMEABLE SEGMENT AND TUNNEL USING THE WATER PERMEABLE SEGMENT

摘要

PROBLEM TO BE SOLVED: To provide a water permeable segment for use in constructing a tunnel, in which a water leading means for leading groundwater is arranged, and a water leading pipe for introducing the groundwater, and a drain pipe for draining the introduced groundwater via the water leading means to the outside, are arranged in the water leading means, the segment being simple in structure and excellent in maintenance ease, and facilitating construction of the tunnel, and to provide the tunnel constructed of the water permeable segments.;SOLUTION: The segment is for use in constructing the tunnel in the ground where groundwater is present, and a segment body has the water leading means arranged therein, as a groundwater leading channel. The segment body has formed therein guide pipes in a thickness direction of the segment body in a manner being orthogonal to the water leading means and communicating with the same. The segment body further has cleaning pipes arranged therein. Each cleaning pipe has one end thereof communicating with the water leading means in the segment body, and the other end thereof adjoining an internal surface of the segment body, and a cleaning water stop valve for maintenance is detachably arranged therein. Then the water permeable segments thus formed are assembled to construct the tunnel.;COPYRIGHT: (C)2009,JPO&INPIT