System and construction method of single-layer lining tunnel structure based on mine-tunnelling method
US11821316B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2023 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Apr 28, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D11/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Provided are a system and construction method of a single-layer lining tunnel structure based on a mine-tunnelling method. With the single-layer lining tunnel structure, a structural rigidity and durability of the tunnel are improved. A construction process of sprayed concrete is improved, specifically, compactness agent and durability enhancing fiber are added to concrete to improve the compactness of concrete, and a special spraying process is adopted to reduce a bound rate of the concrete, and thus to improve the impermeability of sprayed concrete to reach a impermeability level of waterproof concrete. Steel fiber, cellulose fiber, synthetic fiber and other materials are added into the concrete can improve the tensile strength, crack resistance and durability of the concrete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.