Method for installing a screw pile

Details Method for installing a screw pile Method for installing a screw pile

2008-03-04

2008-03-04

Lagman, Frederick L. (Department: 3672)

Hydraulic and earth engineering

Foundation

Columnar structure

C405S241000, C405S252100

Reexamination Certificate

active

07338232

ABSTRACT:
A screw pile is equipped with internal grout pipes extending downwardly through the bore of the tubular pile shaft. The grout pipes connect with side-opening ports in the shaft side wall, to form conduits through which fluid grout may be injected into the surrounding ground. The grout is injected at high pressure as the pile is rotatively driven into a sub-surface target formation in which the pile is to be landed. In this way, the grout is distributed along a vertical interval of formation. It has been shown that this technique is characterized by increased load capacities of the implanted pile, relative to piles implanted without grouting or with grouting but only at landed depth.

REFERENCES:
patent: 3206936 (1965-09-01), Moor
patent: 4533279 (1985-08-01), van den Elzen et al.
patent: 5304016 (1994-04-01), Kunito
patent: 5575593 (1996-11-01), Raaf
patent: 5707180 (1998-01-01), Vickars et al.
patent: 5919005 (1999-07-01), Rupiper
patent: 5934836 (1999-08-01), Rupiper et al.
patent: 60156821 (1985-08-01), None
patent: 01039416 (1989-02-01), None

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