Low load pipe for pipe jacking
US4966494A · kind A · utility
5Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1988 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Nov 28, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
When carrying out replacement of an old main with a new one while crushing the old pipe line by a pipe jacking construction method in which the pipe line is formed by inserting pipes one by one horizontally from a launch pit without excavating the ground, application of low load is sufficient for forward movement of new main. Accordingly, a pipe for pipe jacking is able to endure to low load. Thus, there is provided an improved pipe for pipe jacking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.