Title:
TUNNEL TIMBERING
Document Type and Number:
Japanese Patent JP3236568
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a tunnel timbering allowing smooth and efficient construction work for an excavated tunnel wall surface.
SOLUTION: Cutouts are provided in the bottom of the skin plate of a tunnel excavator and lower-layer piece members 1A are installed on the bottom face part of an excavated tunnel wall surface T exposed through the cutouts 14. Upper-layer piece members 1B are placed on the lower-layer piece members 1A and upper timbering pieces and top timbering pieces are connected in turn to the upper-layer piece members 1B to assemble a reduced diameter tunnel timbering A. Thereafter, the tunnel excavator 10 is advanced and fed relatively toward the excavated tunnel wall surface T from the skin plate 13 while the reduced diameter tunnel timbering A is left behind on the excavated bottom face part. Then the reduced diameter tunnel timbering A is increased in diameter and made to abut on the excavated tunnel wall surface T and the lower end face of each upper timbering piece is connected to the end face of each lower-layer piece member 1A.
Inventors:
Takayoshi Nakayama
Junji Ono
Shoji Inoue
Kazuo Nishikawa
Saburo Okuno
Junji Ono
Shoji Inoue
Kazuo Nishikawa
Saburo Okuno
Application Number:
JP36676298A
Publication Date:
December 10, 2001
Filing Date:
December 24, 1998
Export Citation:
Assignee:
Okumura Gumi Co., Ltd.
International Classes:
E21D11/12; (IPC1-7): E21D11/12
Domestic Patent References:
| JP10252397A |
Attorney, Agent or Firm:
Takuya Yamamoto