Pile-forming method for compound extruded and expanded pile and pile-forming equipment for compound extruded and expanded pile
US9816244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2014 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Jul 2, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D2250/0038
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pile-forming method for a compound extruded and expanded pile, comprising using a compound extrusion and expansion drilling tool of pile-forming equipment for a compound extruded and expanded pile to drill, extrude, and expand to form a bore, wherein when upwardly rotating and lifting, expansion bodies of the compound extrusion and expansion drilling tool enlarge, and at the same time, a concrete pump is started up to pour a pile material under pressure into the pore for the pile, to reach a pile top mark height, obtaining a compound extruded and expanded pile. Pile-forming equipment for a compound extruded and expanded pile is also disclosed, comprising a compound extrusion and expansion drilling tool and a control system thereof. The compound extrusion and expansion drilling tool comprises a drill stem. A plurality of expansion bodies are provided on a threaded section of a drill bit of the drill stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.