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Title:
Groundwater level fall system
Document Type and Number:
Japanese Patent JP6245499
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent a pressure-reduced state in a well pipe from being made maintainable due to air flowing into the well pipe when lowering a ground-water level by using a vacuum deep well.SOLUTION: An inventive ground-water level lowering system 1 evaluates a water level h of ground-water in a well pipe 2 by water level evaluation means consisting of a water gauge 11, a differential pressure gauge 12, and a sequencer 13, when pumping up ground-water flowing into the well pipe 2 from the well pipe. The ground-water level lowering system uses the evaluation value, and thus controls a flow control valve 14 via the sequencer 13 so that the water level of the ground-water in the well pipe 2 becomes higher than a strainer 6.

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Inventors:
Yuki Yamada
Yoshihiko Morio
Application Number:
JP2013118315A
Publication Date:
December 13, 2017
Filing Date:
June 04, 2013
Export Citation:
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Assignee:
Obayashi Corporation
International Classes:
E02D19/10
Domestic Patent References:
JP2007162298A
JP11325397A
JP57179713A
JP60149925A
JP2000112533A
JP3974851B2
JP4824435B2
JP4743355B2
JP2011256670A
Attorney, Agent or Firm:
Satoshi Kubo



 
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