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Title:
SAND REMOVAL METHOD OF DAM SEDIMENT
Document Type and Number:
Japanese Patent JP2012255276
Kind Code:
A
Abstract:

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.


Inventors:
OSAKI YUSAKU
ASO TOSHIMITSU
Application Number:
JP2011128205A
Publication Date:
December 27, 2012
Filing Date:
June 08, 2011
Export Citation:
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Assignee:
SHIMIZU CONSTRUCTION CO LTD
International Classes:
E02B7/20; E02B8/00
Domestic Patent References:
JP2004169337A2004-06-17
JPH1077623A1998-03-24
JPH10292773A1998-11-04
JP2007303248A2007-11-22
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Yoshifumi Saeki



 
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