EXPANSION-CONTRACTION TYPE TUNNEL EXCAVATOR, AND EXPANSION-CONTRACTION METHOD FOR BARREL PART THEREOF

Japanese Patent JP3841624

B2

PROBLEM TO BE SOLVED: To enable propulsion to be reliably obtained by taking a segment as a reaction receiver and smoothly carry out widening between a normal excavation part and a widening excavation part and the excavation of a shrinkage-of-width migration part.
SOLUTION: A shield body 1 whose front part having a cutter head capable of widening excavation is provided with a fixed barrel part 4 and a movable barrel part 5 disposed in such a manner as to move freely in a widening direction relative to the barrel part 4. The barrel part 5 is provided with a widened inner barrel 6 free to move in parallel in an expansion-contraction direction and an oscillating outer barrel 7 supported on the inner barrel 6 in such a manner as to be free to oscillate back and forth. The inner barrel 6 is provided with a movable propulsion jack for taking the segment assembled within the shield body 1 as the reaction receiver in order to propel the shield body 1 forward.

JPS55165395	METHOD OF AND APPARATUS FOR BUILDING UNDERGROUND CONSTRUCTION
JP2882481	INDUSTRIAL APPLICABILITY: Muddy water / mud pressure shield drilling combined geological gas detection method and detection device
JPS63147092	SMALL-BORE PIPE PROPULSION METHOD AND DEVICE

Hiromasa Kazumasa
Sakamoto Hirozo
Atsushi Shinkawa
Taiji Hanaoka

JP2000240524A

November 01, 2006

August 09, 2000

Click for automatic bibliography generation  

Okumura Gumi Co., Ltd.
Hitachi Zosen Corporation

E21D9/06; (IPC1-7): E21D9/06

JP5948595A
JP200238882A
JP6136497A

Yoshihiro Morimoto

Previous Patent: HANDPIECE FOR LASER TREATMENT APPARATUS

Next Patent: BARREL PART STRUCTURE OF EXPANSION-CONTRACTION TYPE TUNNEL EXCAVATOR