Title:
DEWATERING METHOD
Document Type and Number:
Japanese Patent JP3511516
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a dewatering method, by which a collecting pipe is installed easily in a borehole and water can be drained even when there are a large amount of spring water.
SOLUTION: In the dewatering method in which the collecting pipe 3 is inserted into the borehole 2 bored to a ground 1 and the ground is drained, a widening boring process in which the bored borehole 2 is widened and bored up to a fixed depth and a collecting-pipe inserting process in which the collecting pipe 3 having approximately the same diameter as an expanded diameter is inserted into the widened and bored borehole 2 are provided. In the dewatering method, a drainage section 4 with a plurality of drain inlets 41 and 42 draining water collected from the other end section 32 is mounted at one end section 31 of the collecting pipe 3. In the dewatering method, open- close means 41a and 42a for opening and closing a plurality of the drain inlets 41 and 42 respectively are secured to the drainage section 4.
Inventors:
Kameyama, Katsuhiro
Ochikawa, Takayuki
Ishii, Masanori
Ochikawa, Takayuki
Ishii, Masanori
Application Number:
JP2001344580A
Publication Date:
March 29, 2004
Filing Date:
November 09, 2001
Export Citation:
Assignee:
NISHIMATSU CONSTR CO LTD
International Classes:
E21D9/04; E21F16/02; (IPC1-7): E21D9/04; E21F16/02
Attorney, Agent or Firm:
荒船 博司 （外１名）
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