Methods for forming a short aggregate pier and a product formed from said methods
US6354766B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Feb 9, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods for augmenting the load bearing characteristics of short aggregate piers include preloading matrix soils, adding chemical additives to matrix soils and using mesh reinforcement in matrix soils and in cooperation with the aggregate lifts associated with pier constructions. Methods for expanding the feasibility of short aggregate piers include the use of gradations of aggregate, reducing friction between the short aggregate pier and adjacent matrix soils using liners or lubricating materials, controlling liquefaction by employing aggregate drains in short aggregate pier constructions, the use of non-impact forces alone or in conjunction with vibratory forces in construction short aggregate pier lifts, and the use of indigenous materials in short aggregate pier constructions. Other methods for augmenting the construction of short aggregate piers include the use of variable dimensioned lifts, the use of interlocking aggregates and recycled materials, such as recycled concrete, the use of temporary casings to protect pier cavities, and the use of load sensors to monitor stresses within short aggregate pier constructions and pressure cells to measure load/deformation characterist…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.