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Patent Searching and Data


Title:
DRAINAGE BORING
Document Type and Number:
Japanese Patent JP3163367
Kind Code:
B2
Abstract:

PURPOSE: To drill a hole and install a drainage pipe in the hole in less numbers of process without flowing out of sand by treating only water and prevent sand after the installation by using the drainage pipe as a screen pipe and take in only water and perfectly prevent sand from flowing out during the work and also after the work.
CONSTITUTION: A guide pipe 2 in which a cut-off box 4 is attached to the opening of hole is installed. A lost bit 6 with a check valve 5 is provided at the front end thereof. A casing 7 in which the nearby place of the front end is formed as a screen pipe 9 and the upper part is formed as a pipe 15 without holes, is inserted in the guide pipe 2. An inner rod 34 is connected to the lost bit 6 and water passing the inner rod 34 is poured from the lost bit 6 at the front end on excavating to drain water and discharge mud from the clearance around the casing 7. After completion of boring only the inner rod 34 is removed.


Inventors:
Akira Hashimoto
Masatsugu Eto
Yasuhiro Okada
Akira Higuchi
Application Number:
JP14779494A
Publication Date:
May 08, 2001
Filing Date:
June 29, 1994
Export Citation:
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Assignee:
Nittoku Construction Co., Ltd.
Higuchi Engineering Co., Ltd.
International Classes:
E02D19/10; E02D3/10; (IPC1-7): E02D3/10
Other References:
松尾新一郎・河野伊一朗著,「地下水位低下工法」,鹿島研究所出版会,1970年2月20日,p.116−123
Attorney, Agent or Firm:
Tsukasa Kubo