Title:
METHOD OF MAKING CONSTRUCTION FOR LIQUEFACTION PREVENTION AT TIME OF EARTHQUAKE OF GROUND AND AIR-SUPPLY AND EXHAUST PIPE STRUCTURE USING THE SAME
Document Type and Number:
Japanese Patent JP3098466
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method of making a construction for liquefaction prevention of a ground, in which no ground is settled and the liquefaction preventive effect is continued semi-permanently even at the time of the occurrence of an earthquake.
SOLUTION: An air-impermeable film 1 is formed to a ground surface within a micro-foam mixing range for shaping the micro-foam mixing range into a ground having weak adhesion, and an air-impermeable cutoff wall 2 is formed up to specified depth in the ground from the film 1. Operation, in which air blowing pipes 4 are penetrated into the ground from the ground surface while penetrating the air-impermeable film 1 on the inside of the cutoff wall 2, micro- foams are detained into the ground while lowering a goundwater level by blowing off compressed air into the ground from the front ends of the air blowing pipes 4 and excess foams are collected by air collecting pipes 5 inserted into the ground in response to the insertion of the air blowing pipes 4 and discharged onto the ground, is repeated.
Inventors:
Shunta Shiraishi
Application Number:
JP19520497A
Publication Date:
October 16, 2000
Filing Date:
July 07, 1997
Export Citation:
Assignee:
Shunta Shiraishi
International Classes:
E02D3/00; E02D3/08; E02D27/34; (IPC1-7): E02D27/34
Domestic Patent References:
| JP7158051A |
Attorney, Agent or Firm:
Nobuyuki Hayashi