Segment for intake tunnels
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 16, 2001
Grant Date -
N/A
app pub date -
Feb 3, 1999
filing date -
Aug 13, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A segment 20 has segment units 22 obtained by dividing a cylindrical body having an appointed length into four sections along the circumferential direction. The segment units 22 are provided with a segment body 22a, a porous concrete layer 22b, water intake pores 22c, and clogging members 22d. The segment body 20a is constructed of a cast iron plate or steel plate and has an inwardly recessed portion on its outer circumferential surface. The concrete layer 22b is a porous material having water permeability, and is filled and solidified in the inwardly recessed portion 201a. The water intake pores 22c are formed on the flat bottom of two recessed portions 201a so as to penetrate the bottom, and are provided in a plurality along the circumferential direction with an appointed interval. The clogging members 22d are detachably screwed to the water intake pores 22c, wherein they clog the respective water intake pores 22c, and if the clogging members are removed, the water intake pores 22c are made open to the outside.
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