| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a grout injection port with improved stability and watertightness for mounting a socket where a grout injection pipe is connected. SOLUTION: A socket 3 with a flange where an internal thread 4 for connection of a grout injection pipe is formed at an inner periphery is inserted into a socket-mounting hole 2 that is formed at a pressure jacking pipe 1, and the socket 3 is fixed by the clamping of a nut 8 that is connected to an external thread 7 of the end part outer-periphery surface of the socket 3. A seal member 10 is provided between the opposing surfaces of a flange 6 of the socket 3 and the pressure jacking pipe 1 and between opposing surfaces of the nut 8 and the pressure jacking pipe 1, thus retaining the watertightness between the inner periphery of the socket-mounting hole 2 and the outer periphery of the socket 3. After grout is injected between the pressure jacking pipe 1 and the ground from the grout injection pipe that is connected to the socket 3, the grout injection pipe is removed, a plug 11 with a flange is engaged to the internal thread 4 of the socket 3 with a screw, the end opening of the socket 3 is blocked, and a sealing member 13 is provided between the opposing surfaces of the flange 12 and the socket 3 for retaining watertightness.</p> |
