Method of filling an excavated opening
US5921707A · kind A · utility
11Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1998 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Mar 6, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/025
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An excavated opening (10) through a pavement (12) of a highway and through the underlying base material (14) to expose a gas main (16) is filled by (i) mixing on site cement, foaming agent and water to produce a fluid grout (26), (ii) mixing the grout with loose excavated spoil (22) in the opening, (iii) agitating the mixture using a hand-held poker vibrator (30), (iv) and repeating this procedure until the level (40) is reached. The level (40) corresponds to the underside of a protective layer (50) which is subsequently applied. The majority of the excavated loose spoil from the opening is reused.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.