Tunnel wall with lining
US5332334A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1993 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Feb 18, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D11/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tunnel wall with a lining is comprised of substantially trapeze- or trapezoid-shaped tubbing stones (8-13), which are at least similar and complement each other in an even number to form a respective tubbing ring (7), the tubbing stones being held together at their end faces (14, 15) defining the annular gap after mounting by dowel-like plug connections permitting a limited transfer of shearing forces and along the oblique longitudinal gaps (16) by groove-spring connections consisting of springs (18) inserted into longitudinal grooves (17) extending along the oblique longitudinal sides. To provide the lining with resilience against the pressure of the rock formation, compressible springs (18) are provided which, in the unstressed state, hold the stones (8-13) at a distance to form longitudinal gaps and which are compressible under the pressure of the rock formation to reduce the width of the gaps, and the tubbing stones are connected at their end faces (14, 15) with the neighboring tubbing stone in the succeeding tubing ring (7) by a single center dowel (19).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.