Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
EXCAVATION METHOD OF DEEP HOLE AND DEVICE THEREOF
Document Type and Number:
Japanese Patent JPH0420693
Kind Code:
A
Abstract:

PURPOSE: To reduce the cost of construction for a deeply excavated hole by providing rotating and percussing driving sections to the base end of a spiral rod provided with a bit in which air outlet holes are bored to continue excavation while adding to the spiral rod.

CONSTITUTION: Rotation and percussion are given to the base end of a spiral rod 1 having the front end provided with a bit 5 in which air outlet holes 9 and 10 are bored in the direction of the excavation and in the opposite direction by a rotating driving section 22 and a percussing driving section 26 on a slide 19 raising and lowering a body frame 14 in the vertical direction. In addition, excavation is made by the bit 5 while supplying air. After that, when the excavation is completed by one piece of the spiral rod 1, the spiral rod 1 is successively added to excavate. Excavated earth, etc., are collected from a a dust collecting port 61 additionally provided to a dust prevention cap 57 upward of an excavated hole section 73. According to the constitution, a deep hole excavation can be efficiently carried out.


Inventors:
ASANO JUNICHI
YAMADA KAZUO
BANDO YOSHIZO
YOSHIDA NOBUHIRO
Application Number:
JP12360390A
Publication Date:
January 24, 1992
Filing Date:
May 14, 1990
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KANSAI ELECTRIC POWER CO
KINDEN CORP
International Classes:
E21B10/18; E21B6/00; E21B6/02; E21B7/00; E21B10/44; E21B21/00; (IPC1-7): E21B7/00; E21B10/18; E21B10/44; E21C7/02
Domestic Patent References:
JPS6245951A1987-02-27
Attorney, Agent or Firm:
Akiyama Hoomi (2 outside)