Compound-type tunneling shield
US10077657B2 · kind B2 · utility
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5Claims
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Inventors
Key dates
| Filing date | Aug 6, 2014 |
| Grant date | Sep 18, 2018 |
| Priority date | — |
| Expiry date | Jul 14, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/112
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tunnel boring apparatus includes a shield body and a cutting disc provided at a front portion of the shield body. The tunnel boring apparatus includes a high pressure liquid device, which includes a liquid storage tank for storing a predetermined amount of liquid, a pressure raising device for increasing a pressure of the liquid, and a plurality of nozzles. The pressing raising device is connected to the liquid storage tank, and to a central rotating head through a first guiding pipeline. The nozzles are provided on the cutting disc, and are connected to the central rotating head through a second guiding pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.