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Title:
BORING DEVICE
Document Type and Number:
Japanese Patent JP2006104766
Kind Code:
A
Abstract:

To carry out boring well while minimizing striking force applied to an insertion pipe and to insert the insertion pipe in a borehole at the same time in a boring device used in the case of boring a hole in the advance natural ground to excavate a tunnel and inserting a reinforcing pipe in the borehole at the same time in a natural ground reinforcing method in a tunnel prelining construction method or the like.

This boring device applies rotary striking force to a boring bit B provided on the tip side of a boring rod 3, to bore a hole in the ground and pulls insertion pipes 4 sequentially into the borehole with the advance of the boring bit B at the same time. A buffer cylindrical body 6 through which the boring rod 3 is insertable, is provided between the boring bit B and the insertion pipe 4, and the buffer cylindrical body 6 is constituted to be relatively movable by a predetermined distance in an axial direction with respect to each of the boring bit B and the insertion pipe 4.


Inventors:
Yamamoto, Takuji
Fukuya, Yoshinori
Miyajima, Yasuyuki
Wakita, Shingo
Tsuji, Takashi
Haneuma, Toru
Application Number:
JP2004000292597
Publication Date:
April 20, 2006
Filing Date:
October 05, 2004
Export Citation:
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Assignee:
KAJIMA CORP
KFC LTD
International Classes:
E21B17/07; E21B6/02; E21B7/20; E21D9/04
Attorney, Agent or Firm:
高橋 隆二
元井 成幸



 
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