To provide a sand removal method effective and appropriate for removing dam sediment.
The sand removal method comprises the steps of: sinking a caisson to a lake bottom surface of a sand storage dam 10 and installing a temporary vertical shaft 14; constructing a propulsion pipe 31 by a jacking method from a distal end of a sand removal tunnel 13 to the temporary vertical shaft 14 and connecting the distal end to the caisson so as to be cut off; inserting a sand removal pipe 12 from the inside of the sand removal tunnel to the inside of the propulsion pipe; cutting off the caisson and the propulsion pipe and removing the temporary vertical shaft; floating a distal end of the sand removal pipe onto a water surface of a dam lake; connecting a sediment suction device to the distal end of the sand removal pipe on a lake surface of the dam lake and sinking it; and sucking the sediment by the sediment suction device and discharging it through the sand removal pipe 12 to the distal end of the sand removal tunnel 13.
ASO TOSHIMITSU
JP2004169337A | 2004-06-17 | |||
JPH1077623A | 1998-03-24 | |||
JPH10292773A | 1998-11-04 | |||
JP2007303248A | 2007-11-22 |
Tadashi Takahashi
Takashi Watanabe
Yoshifumi Saeki