Method and apparatus for feeding a tunnel roof support system from the roof shield of a TBM
US6468000B2 · kind B2 · utility
6Cited by
15References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/093
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A primary support for a tunnel roof comprising elongated lagging members which are “extruded” from tubes forming a shield for a tunnel boring machine. The lagging is inserted into the tubes at different times so as to avoid having the ends of adjacent lagging members coincide. As the tunneling machine progresses in the direction of boring, the lagging members emerge from the shield tubes to form a primary tunnel roof lining. Ring beams or arc beams may be installed as required by rock bolts or other fastening devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.