Title:
SAND GROUND LIQUEFACTION PREVENTING WORK METHOD
Document Type and Number:
Japanese Patent JP2743055
Kind Code:
B2
Abstract:
PURPOSE: To make a liquefaction preventing work easily even in narrow districts without producing vibration and noise and also with hardly producing discharged residual soil.
CONSTITUTION: A casing pipe 6 of 150mm or less in inner diameter at the top outer periphery of which a screw 11 is formed is pressed into a ground 2 while rotating. Also a synthetic resin net bag 17 is inserted into a casing pipe 6. Crushed stones 15 consisting primarily of those of 5 to 13mm in grain size are charged into a net bag 17 to form a crushed stone column extending to the ground. Next the casing pipe 6 is extracted. The head of the crushed stone column is formed integrally with a sand mat or crushed stone mat laied down on the ground. When the casing pipe 6 is pressed while rotating or the crushed stones 15 are charged into the net bag 17, water is supplied into the casing pipe 6 to suppress underground water from being spouted out.
Inventors:
Katsuaki Kashihara
Application Number:
JP30894893A
Publication Date:
April 22, 1998
Filing Date:
December 09, 1993
Export Citation:
Assignee:
Seiwa Kiko Co., Ltd.
International Classes:
E02D3/08; E02D3/10; (IPC1-7): E02D3/08; E02D3/10
Domestic Patent References:
| JP1226919A | ||||
| JP3125796A | ||||
| JP238617A | ||||
| JP6149018A |
Attorney, Agent or Firm:
Dozo Isono