Title:
LIFTING METHOD OF SOIL BY TWIN-EARTH DRILL OF EXCAVATED SOIL IN PNEUMATIC CAISSON
Document Type and Number:
Japanese Patent JPH07310328
Kind Code:
A
Abstract:
PURPOSE: To increase the efficiency of lifting excavated soil and reduce the cycle time and make the work safe and further, meet the unmanned indoor operation.
CONSTITUTION: The first drilling bucket 33a of a soil-lifting device 20 suspended from a rotary post in an air lock 6 is positioned in a slab-pierced hole 3a for lifting soil and the second drilling bucket 33b is positioned in a hopper 7a of a soil-lifting device 8 on the ground. The bucket 33a is lowered and loaded with the excavated soil in the operation room 4 and the excavated soil in the bucket 33b is discharged and then the bucket 33a is hoisted up and the rotary post is turned by 180 degrees and the same processes are repeated.
Inventors:
MATSUI NOBUYUKI
Application Number:
JP10364394A
Publication Date:
November 28, 1995
Filing Date:
May 18, 1994
Export Citation:
Assignee:
KAJIMA CORP
International Classes:
E02F5/04; E02D23/06; E02D23/08; (IPC1-7): E02D23/06; E02F5/04
Attorney, Agent or Firm:
Toshitada Takahashi (1 outside)