METHOD OF EXCAVATING TUNNEL, ETC., AND BORING MACHINE THEREOF

Title:

METHOD OF EXCAVATING TUNNEL, ETC., AND BORING MACHINE THEREOF

Document Type and Number:

Japanese Patent JPH0533589

Kind Code:

A

Abstract:

PURPOSE: To make it possible to form an improved longer column in an injection stirring type fore-piling method.

CONSTITUTION: In a tunnel excavation method, boring is made by means of a drill unit equipped with a double pipe mounted on a boring machine. An outer casing 21 on the outside of the double pipe is rotated in the first direction, and an inner rod 30 of the double pipe is rotated in the second direction opposite to the first direction to make boring.

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Inventors:

NAKANISHI WATARU
NAKAJIMA SHIRO
KAMEI AKIHIKO
MASUMOTO TERUO
YOSHIDA MITSUHIRO
ICHIMARU MICHIO

Application Number:

JP20891491A

Publication Date:

February 09, 1993

Filing Date:

July 26, 1991

Export Citation:

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Assignee:

NIT CO LTD
TOKIWA KENSETSU KK
SUMITOMO COAL MINING
YOSHIDA TEKKOSHO KK

International Classes:

E02D3/12; E21B4/14; E21B6/00; E21B6/02; E21D9/00; E21D9/10; (IPC1-7): E02D3/12; E21B4/14; E21B6/00; E21D9/00; E21D9/10

Attorney, Agent or Firm:

Tomisaki Motonari

Next Patent: フレキシブルプリント配線板の取付構造