Segment for intake tunnels
US6302621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Feb 3, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D11/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.