Frost damage proofed pile
US4818148A · kind A · utility
28Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1988 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Mar 7, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D5/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A covering is applied onto the outer surface of a pile including a steel pipe or the like to surround a predetermined length thereof so as to reduce a frost heaving force or negative friction acting on the pile in a frigid area. The covering is closely adhered by an adhesion layer the like to the pile over a given length thereof. This given length is between 0.5 and 5 m. The covering member includes a smooth-surfaced plastic covering or elastic covering. A rugged surface covering may be provided below the smooth surfaced covering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.