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Patent Searching and Data


Title:
LIQUEFACTION CONTROL DEVICE AND LIQUEFACTION CONTROL METHOD
Document Type and Number:
Japanese Patent JP2015151789
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a liquefaction control device and a liquefaction control method capable of preventing damage, such as inclination or settlement of a building constructed on the ground with accumulation of a lose sand layer and flotation of a structure buried in the ground, associated with liquefaction at the time of an earthquake.SOLUTION: A liquefaction control device is installed around a manhole A buried in the liquefaction ground. The liquefaction control device comprises: a drainpipe 1 which is buried around the manhole A; a drainage control valve 5 which is installed on an upper edge section of the drainpipe 1; a coil spring 6; and a cap 7. The drainage control valve 5 is installed in a manner that opens a drainage port 1b at the upper edge section of the drainpipe 1 by being upwardly pushed in a pipe axial direction of the drainpipe 1 with water flowing into the drainpipe 1 as excessive pore water pressure in the ground increases and closes the drainage port 1b by being downwardly pushed in the pipe axial direction of the drainpipe 1 with the coil spring 6 as the excessive pore water pressure decreases. The drainpipe 1 has a plurality of water collecting holes 1a on a periphery thereof.

Inventors:
SHIMADA SHUNSUKE
Application Number:
JP2014027438A
Publication Date:
August 24, 2015
Filing Date:
February 17, 2014
Export Citation:
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Assignee:
KYOKADO ENGINEERING CO LTD
KYOKADO ENGINEERING CO LTD
International Classes:
E02D27/34; E02D3/10; E02D27/32; E02D31/00
Attorney, Agent or Firm:
久門 享
久門 保子