US1960888A - Pile point - Google Patents

Description

May 29, 1934. G, ATWELL 1,960,888

PILE POINT Filed May 4, 1955 llil HQ INVENTOR. 6mg: .l. AfWe/l.

HIS A TTORNEY.

Patented May 29, 1934 UNE'FED STATES PATENT OFFICE PILE PoiN'r York,

N. Y., a corporation of New York Application May 4, 1933, Serial No. 669,296

1 Claim.

This invention relates to piles, and more particularly to a pile point adapted to engage the leading end of a pile to serve as a pilot therefor.

In driving piles, the object sought is to pene- 5 trate to a depth at which the static friction on the sides added to the resistance to the pile point will support a given load. In the majority of forms used heretofore, the only object of the point is to cause easy penetration and because 0 of the smooth sharp taper the supporting power is negligible. Piles having this sort of point are unreliable since under their rated load they may gradually penetrate a relatively hard strata and thereby cause settling of the supported structure.

In the improved form, the point not only acts as a pilot for the pile but in addition provides a bearing surface which is of course of much greater value than only friction on the sides of the pile. It will be apparent that the object of driving a pile is not penetration of hard strata so much as a proper bearing and support thereon. Accordingly the form of point to be described has the advantage of great saving in length of pile driven as Well as an improved hearing.

In the practice of the invention the pile point is provided with a pilot end and guiding surfaces to properly direct the pile and additional surfaces to provide compacting or consolidation of material upon which the end of the pile is to rest.

One object of the invention is to assure proper support of the pile in the substance wherein it is embedded.

Another object is to enable the pile point to be readily and conveniently attached to a pile.

A further object is to increase the density of the soil or embedding material beneath or in advance of the pile point and thus assure a firm seat for the pile.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference characters refer to similar parts,

Fig. 1 is a side elevation of the pile point and a pile to which it is applied.

Fig. 2 is an enlarged sectional elevation of the pile point and a portion of the pile, and

Fig. 3 is an end view of the pilot portion of the pile point.

Referring more particularly to the drawing, A designates the pile point and B a pile for which it serves as a pilot to facilitate penetration of the pile into the soil C.

The pile point A, constructed in accordance with the practice of the invention is preferably in the form of a shell, comprising a pilot portion D, preferably of conoid shape, and an extension E formed integrally with the pilot portion. The extension E is shaped to conform substantially to the interior of the pile B into which it may extend and, in such case, may be tapered exteriorly on its free end, as at F, to enable the extension to be readily entered into the pile.

In the form of the invention illustrated, as 65 where the extension E lies within instead of exteriorly of the pile, the point A is provided with an external flange G having a seating surface H which serves as an abutment for the end J of the pile. 7

The flange G, which is preferably located at the base of the pilot portion may, if desired, be of slightly larger diameter than the pile, so that, during the driving thereof the flange will effect the displacement of a slightly larger amount of embedding material than would be actually displaced by the pile itself.

In order to compress the soil in advance of the pilot portion, thus providing a firm seating for the pile, a compressing surface K is formed on the front end of the flange to engage the soil lying forwardly thereof and cause the soil particles to be pressed into a dense mass. A similar compressing surface, designated L and serving a like purpose, is provided on an annular rib O on the pilot portion, said rib 0 being located intermediate the ends of the pilot portion.

The surfaces K and L preferably lie normal to the axis of the pile point, and in concentric relationship with respect to each other and, as illus- 0 trated, are enlargements on the pilot rather than in the surface of the pilot portion.

I claim:

A pile point having a conoid pilot portion, and a plurality of laterally extending annular surfaces on the pilot portion to compress embedding material beneath the pilot portion.

GEORGE J. ATWELL.

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