Title:
EXECUTION OF SUPPORT BODY FOR TUNNEL EXCAVATION WALL FACE
Document Type and Number:
Japanese Patent JP3236546
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide the execution method of a support body capable of accurately supporting the upper peripheral wall part of a tunnel wall face in which a bedrock is easy to collapse.
SOLUTION: A ring-like support body which is smaller diameter than a tunnel excavation wall face T by a plurality of support pieces 1, 1A, 1B and stretching a bedrock collapse prevention member 2 composed of a wire gauze on an upper half part is formed. Next, the lower support piece 1B of the ring- like support body and the support pieces 1A, 1A of both the side parts are expanded in same size by expansion jacks 5, 5, the ring-like support body is diameter-enlarged, a bedrock collapse prevention member 2 stretched on the upper half part of the ring-like support body is disposed in the state where it accurately runs along the upper peripheral wall part of the tunnel excavation wall face T without displacing the bedrock collapse prevention member 2 in the tunnel circumferential direction and loose load by the collapse of a bedrock, fall of a rock and the like locally produced on the upper peripheral wall part of the tunnel excavation wall face T is supported.
Inventors:
Takayoshi Nakayama
Junji Ono
Kazuo Nishikawa
Saburo Okuno
Kazuhiro Shikano
Junji Ono
Kazuo Nishikawa
Saburo Okuno
Kazuhiro Shikano
Application Number:
JP33492397A
Publication Date:
December 10, 2001
Filing Date:
November 18, 1997
Export Citation:
Assignee:
Okumura Gumi Co., Ltd.
International Classes:
E21D11/14; E21D11/40; (IPC1-7): E21D11/40; E21D11/14
Domestic Patent References:
| JP10252397A |
Attorney, Agent or Firm:
Takuya Yamamoto