Covering plate assembly for steel pipe piles

Details Covering plate assembly for steel pipe piles Covering plate assembly for steel pipe piles

1999-06-02

2001-07-03

Browne, Lynne H. (Department: 3629)

Hydraulic and earth engineering

Foundation

Columnar structure

C052S301000, C405S231000, C405S229000, C403S383000

Reexamination Certificate

active

06254314

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to covering plates for reinforcing steel pipe piles used in forming concrete foundations. The piles are driven to compact the ground in the construction of buildings, bridges, and the like.
2. Description of the Prior Art
Generally, the compaction of the ground is required to increase the strength of soft ground when constructing bridges and buildings. Compaction may be accomplished by general driving (rubbles, sand, long cornerstones, prestress, etc), pile driving (wood piles, ready-mix concrete, prestress concrete piles, etc), and deep foundation driving (well foundation, submerged foundation, etc).
Covering plate assemblies for the upper ends of steel pipe piles are used to support loads of upper base structures when driving steel pipe piles.
The structure of a known covering plate assembly is shown in FIG.
1
. This known covering plate assembly
10
comprises a bottom plate
11
with a cross reinforced plate
12
welded to the lower side of plate
11
that, in turn, covers the upper side of a steel pipe pile
100
embedded into and protruding out of the ground. A plurality of iron reinforcing rods
20
are evenly spaced and welded around the periphery of plate
11
. The upper ends of reinforcing rods
20
are bent outwardly to easily bind them with other iron reinforcing rods.
However, the covering plate assembly
10
requires that a reinforced plate
12
is secured on the lower side of a bottom plate
11
. Plate
12
has to be cut, bent and produced at the construction site and then be welded to plate
11
. The iron reinforcing rods and bottom plate
11
are butt-welded with round sections. Since each attaching section is short, this results in poor tension loading for an installed foundation base.
SUMMARY OF THE INVENTION
The present invention solves the problems inherent in known covering plate assemblies by providing a covering plate assembly that has iron reinforcing rods stud-welded or bolt-jointed on the upper surface of a bottom plate of the covering plate assembly. The invention is easy to use and install, and has enhanced strength.
The invention includes a cross reinforced plate on the lower side of a bottom plate that covers the upper side of a steel pipe pile. A plurality of spaced iron reinforcing rods are secured around the upper surface of the bottom plate by appropriate jointing methods. Plural cross-arranged, tightening holes are provided in the bottom plate so that the cross reinforced plate may be secured to the lower side of the bottom plate by bolts or by welding. The lower side of the bottom plate may be secured to the upper side of the cross reinforced plate by bolts or welding. The cross reinforced plate may be provided with a plurality of threaded holes for receiving bolts through holes in a pipe to secure the cross reinforced plate to the upper end of the pipe. The iron reinforcing rods may be bent vertically or outwardly.
A plurality of threaded holes may be circumferentially spaced around the upper surface of the bottom plate for engagement by threaded ends of the iron reinforcing rods to secure the rods to the bottom plate. Moreover, the upper surface of a bottom plate and the iron reinforcing rods or round rods may be joined by welding.


REFERENCES:
patent: 1048993 (1912-12-01), Meriwether
patent: 1515257 (1924-11-01), Krasnow
patent: 1545456 (1925-07-01), Ratetter
patent: 2374624 (1945-04-01), Schwendt
patent: 3487646 (1970-01-01), Gatien
patent: 3543524 (1970-12-01), Clements
patent: 4472085 (1984-09-01), Mohler
patent: 4748778 (1988-06-01), Rafter, Sr.
patent: 5073065 (1991-12-01), Kleineke
patent: 5586417 (1996-12-01), Henderson et al.
patent: 5746036 (1998-05-01), Angelette
patent: 5961253 (1999-10-01), Okawa

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