Title:
EXCAVATION METHOD FOR VERTICAL SHAFT
Document Type and Number:
Japanese Patent JP2002213175
Kind Code:
A
Abstract:
To provide an excavation method for a vertical shaft, which eliminates the need for carrying out excavated sediment generated by vertical reciprocation of a bucket in the bucket type excavation method for the vertical shaft and enhances working efficiency by discharging the sediment as it is without slurrying the sediment.
The bucket (2) serving as an excavating means is supported by an end of a pipe material (1) so as to be capable of excavation, and the sediment excavated by the bucket (2) is discharged continuously out of a hole through the inside of the pipe material (1) in the same state as during excavation.
Inventors:
SHIBAZAKI MITSUHIRO
Application Number:
JP2001006087A
Publication Date:
July 31, 2002
Filing Date:
January 15, 2001
Export Citation:
Assignee:
CHEMICAL GROUT CO
International Classes:
E02F7/00; E21B11/04; E21D1/04; (IPC1-7): E21B11/04; E02F7/00; E21D1/04
Attorney, Agent or Firm:
Toshitada Takahashi (1 outside)