Title:
START/ARRIVAL SHAFT FOR SHIELD MACHINE
Document Type and Number:
Japanese Patent JP3678463
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide stability after the start or arrival of a shield machine.
SOLUTION: A wall body 10 is constituted of a reinforcing bar cage 12 and concrete 14, and a low-strength section 16 having no reinforcing bar is formed at the expected penetration position of a shield machine. Multiple synthetic resin sheath pipes 18 penetrating in the vertical direction are arranged at the low-strength section 16. The sheath pipes 18 are connected by multiple synthetic resin connecting members 20. A partition plate 22 arranged at a construction joint section is provided with a synthetic resin partition section 24 at the portion penetrating the low-strength section 16. An unbonded prestressed steel product 26 is inserted into the sheath pipe 18. The prestressed steel product 26 has an unbonded steel wire 26c, the steel wire 26c is fixed to the lower section of the low-strength section 16 at its lower end and to the upper section of the wall body 10 at its upper end in the tensile state, and it is removed from the sheath pipe 18 except for the fixed section at the lower end at the time of the start or arrival of the shield machine.
Inventors:
Ikuo Fujiki
Kenjiro Numazawa
Nishio
Kenjiro Numazawa
Nishio
Application Number:
JP16955395A
Publication Date:
August 03, 2005
Filing Date:
July 05, 1995
Export Citation:
Assignee:
Tokyo Subway Co., Ltd.
Metro Development Co., Ltd.
Kurosawa Construction Co., Ltd.
Concrete Calling Co., Ltd.
Metro Development Co., Ltd.
Kurosawa Construction Co., Ltd.
Concrete Calling Co., Ltd.
International Classes:
E21D9/06; (IPC1-7): E21D9/06
Domestic Patent References:
| JP6084713B2 | ||||
| JP4118497A | ||||
| JP4016695A |
Attorney, Agent or Firm:
Masatoshi Matsumoto