Title:
DRAINAGE BORING METHOD
Document Type and Number:
Japanese Patent JP3195954
Kind Code:
B2
Abstract:
PURPOSE: To bore a hole and install a drainage pipe in the hole without flowing out sand by only treating 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 casing 7 having a lost bit 6 with a check valve 5 at the front end is inserted in the guide pipe 2. Water is ejected from the lost bit 6 at the front end and water and mud are discharged from the clearance around the casing 7 during excavation. After completion of boring, a screen pipe 9 of which upper part is a pipe 15 without holes, is inserted and the lost bit 6 is left and the casing 7 is pulled out.
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Inventors:
Akira Hashimoto
Masatsugu Eto
Yasuhiro Okada
Akira Higuchi
Masatsugu Eto
Yasuhiro Okada
Akira Higuchi
Application Number:
JP14779394A
Publication Date:
August 06, 2001
Filing Date:
June 29, 1994
Export Citation:
Assignee:
Nittoku Construction Co., Ltd.
Higuchi Engineering Co., Ltd.
Higuchi Engineering Co., Ltd.
International Classes:
E02D19/10; E02D3/10; (IPC1-7): E02D3/10; E02D19/10
Domestic Patent References:
| JP4128492A |
Attorney, Agent or Firm:
Tsukasa Kubo