Tunnel framings
US4439064A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | May 4, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G11/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to improvements in U-shaped tunnel framings for poured concrete constituted of two half shells or half casings in the form of a right-angled dihedron. The framings are characterized by the combination in each half casing of a horizontal beam composed of two telescopic sections, a set of panels of modular width resting on the two sections of the horizontal beam and being juxtaposed exactly with respect to it and a horizontal reinforcing beam for stiffening and supporting the bottom of the half casing and located inwardly of its vertical panel. The invention is applicable to the simultaneous construction of walls and ceilings of poured concrete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.