Title:
WATER STOP DEVICE AND CUT-OFF METHOD FOR BURIED PIPE STRUCTURE, AND BURYING DEVICE AND BURYING METHOD
Document Type and Number:
Japanese Patent JP3767314
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a water stop device and cut-off method for a buried pipe structure, and a burying deice and a burying method allowing the pipe structure to be buried underground while maintaining cut-off performance inside and outside of a pipe, and holding good cut-off performance in the pipe after burying.
SOLUTION: This water stop device 5 is provided with an outer frame 6 disposed around a buried pipe at a ground surface part, an expandable movable seal 8a and fixed seal 8b arranged at the inside upper part and lower part of the outer frame 6 to airtightly seal the outer periphery of the buried pipe 1, a pump 10 for feeding a pressure fluid for expansion to the respective seals 8a, 8b, and a selector valve 11 disposed in a pipe line of the pump 10 and selecting the feed direction of the fluid fed into the respective seals 8a, 8b to expand one while contracting the other.
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Inventors:
Tsuyoshi Oida
Junichi Hirao
Junichi Hirao
Application Number:
JP2000112225A
Publication Date:
April 19, 2006
Filing Date:
April 13, 2000
Export Citation:
Assignee:
Obayashi Corporation
International Classes:
E02D5/04; E21D1/03; (IPC1-7): E02D5/04; E21D1/03
Domestic Patent References:
| JP5112927A |
Attorney, Agent or Firm:
Kensuke Isshiki
Noritaka Harashima
Satoshi Suzuki
Noritaka Harashima
Satoshi Suzuki