Side cutting blades for multi-shaft auger system and improved soil mixing wall formation process
US4906142A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1989 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Aug 2, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D5/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is directed to side cutting blades for use with multi-shaft auger machines which mix soil with a chemical hardener in situ to form soilcrete columns. The side cutting blades includes two parallel blades which cut the soil between the adjacent columns along planes approximately tangential to the periphery of adjacent columns. As the soil is cut by the cutting blades, the soil is thoroughly mixed with a chemical hardening agent. Adjacent soilcrete columns are integrally connected by substantial column overlap without physically moving the columns closer together or performing multiple borings on the soil adjacent to the columns formed by the initial boring. The side cutting blades are particularly suited for use with a multi-shaft auger machine which has minimal column overlap. A multi-shaft auger machine equipped with side cutting blades may be used to construct continuous in situ wall formations which are homogeneous in composition and have a minimum thickness approximately equal to the diameter of the auger shafts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.