Process for holding up the lateral walls of deep ditches
US4900197A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Aug 5, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D29/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a process for propping or supporting the vertical support walls of deep ditches. After having freely constructed the ditch, to a depth compatible with the resistance of the support walls (1), a ring-shaped plate (3) is provided at the bottom of the ditch, which bears at its periphery against the vertical support walls (1), and which rests on the bottom of the ditch; after the setting of this ring-shaped plate (3), it is attached to the upper part of the support walls (1) for being supported, by means of braces (5); and then, the ditchs is continued, through the orifice (4) of the ring-shaped plate (3), down to the bottom of the work.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.