US3581508A

US3581508A - Uplift pile anchorage structure

Info

Publication number: US3581508A
Application number: US850803A
Authority: US
Inventors: Ralph W Junius
Original assignee: Individual
Current assignee: Individual
Priority date: 1969-08-18
Filing date: 1969-08-18
Publication date: 1971-06-01
Anticipated expiration: 1988-06-01

Abstract

An uplift pile anchorage structure having a wooden pile with a truncated section cut near the upper end thereof. The upper end of the wooden pile including the truncated section is surrounded by a reinforcing cage and imbedded in a concrete cap. The cap may take form of a large concrete mat having a plurality of such pile structures imbedded therein.

Description

United States Patent 1,893,515 1/1933 Burrell.1............,.,........ 1,929,280 10/1933 [72] Inventor Ralph W.Juni\Ls 501 Jewel St., New Orleans, La. 70124 850,803

FOREIGN PATENTS 37,328 1936 Netherlands....,..........,. 120,250 1947 Sweden..,...

Primary Examiner-Jacob Shapiro Azwrney-Benton Blair [21} Appl. No. [22] Filed Aug. 18, 1969 [45] Patented June 1, 1971 [54] UPLIFI FILE ANCHORAGE STRUCTURE 4 Claims, 9 Drawing Figs.

E02d 5/30, E02d 5/22 a ..e. nmmw m geralaul .m V na an r hp mw uge C memm mm W-MM M c l www.mhfl mn ma e t m y cpnam a s f ABSTRACT: An uplift pile anchor wooden pile with a truncated section 2/2 7, 2 thereof. The upper end of the wooden cated section is surrounded by a rei bedded in a concrete cap. The cap in concrete mat having a pluralit bedded therein.

Field 54, 50, 52, 56.5, 49, 301, 296; 5

[56] References Cited UNITED STATES PATENTS 12/1932 PATENTEUJUN 11971 3.581. 508

sum 1 or a PATENTED JUN 1 I971 SHEET 3 OF 3 UPLIFI PILE ANCHORAGE STRUCTURE This invention relates generally to an uplift pile anchorage structure and more specifically to piles used in association with concrete footings or pile caps.

Files are used to support many forms and types of foundations for structures such as buildings, tanks, bridges, etc. by inserting them into the ground surface far enough to obtain a solid support for the principle structure and to resist pull out or uplift during the tendency of overturning such as that which can be caused by high winds.

When these pile structures are used with a large concrete mat which forms a cap, the capcovers the upper section of the wooden pile member so as to distribute the weight evenly to each pile. Additionally, the piles are normally reinforced with reinforcing bars which are also imbedded within the concrete cap so as to generally surround the upper portion of the wooden pile.

Many of the forces which act upon a structure resting on and secured to these composite piles transform themselves into vertical force components which, in effect, produce a tension on the pile structure itself. Since the pile is driven vertically into the ground, it would be desirable to transform these vertical components of force into horizontal components so that the natural resistance of the composite pile will absorb the vast majority of all stress components produced.

Accordingly, it is an object of this invention to provide an improved form of uplift pile anchorage structure for use with a concrete pile cap.

Another object is to provide a pile for use in an uplift anchorage structure having a truncated section near the upper end thereof with associated reinforcing bars for use with a concrete pile cap.

These and other objects of the invention will be better understood from the following description when taken in conjunction with the drawings wherein FIG. 1 is an elevational view of the wooden pile member of the present invention together with a partial sectional view of the associated concrete pile cap and cage structure;

FIG. 2 is a sectional view taken along lines 2-2 of FIG. 1;

FIG. 3 is a sectional view taken along lines 3-3 of FIG. 1;

FIG. 4 is a perspective view of one form of cage member which may be used with the present invention;

FIG 5, 6 and 7 illustrate the various geometrical forms which may be provided for the truncated section of the wooden pile member of FIG. 1;

FIG. Bis a plan view of modified form of the invention using a group of clustered piles; and

FIG. 9 is an elevational view showing the relationship of the piles to the concrete pile cap.

Broadly speaking, the present invention comprises a pile, or group of wooden piles, including a truncated section cut in the upper part of each of the wooden piles with a reduced area of the truncated section extending downwardly. A concrete pile cap or footing covers the upper part of the wooden piles including the truncated sections. Metallic reinforcing bars are set about the truncated section and imbedded within said concrete cap with securing means such as anchor bolts extending above said concrete pile cap.

Turning now more specifically to the drawings, there is shown in FIG. 1 the upper part of a wooden pile member 11 having its upper end terminated in a substantially flat face 12. The upper portion of this pile member is imbedded in a concrete pile cap 13, a partial section of which is shown in the drawing.

A substantially horizontal kerf 15 is cut in the upper part of the wooden pile member II to a predetermined depth. In the particular showing of FIGS. 1, 2 and 3 this kerf if out so as to terminate in the inner part of the pile with a substantially circular cut having a circumference 16. At a point 17 on the outer circumference of the wooden pile l1 and below the upper face 12, a cut is commenced and extends downwardly to terminate at the inner circumference 16 of the kerf 15. This cut may be made in any manner, and is easily accomplished by hand by using an ax or the like. The cut thus made provides a truncated section or an inverted frustum of a cone l8.

Although not limited to a specific cage structure, there is shown, for purposes of illustration, a cage having a plurality of spaced circular metal rings 19 which lie in substantially parallel horizontal planes. As is more clearly seen in FIG. 4, metal rings 19 are coupled to a plurality of substantially vertical C- members 20. Additionally, a plurality of substantially horizontal C-members 21 extend across the upper portion and are secured to rings 19 and C-members 20. There are also shown two anchor bolts 22 secured to the horizontal C-members and extending upwardly and outwardly from the upper face of the concrete cap 14.

With the provision of the truncated section 18 of the wooden pile member 11, it will be seen that any vertical relative movement of the pile member will be accompanied, of course, by a relative movement of the truncated section. This vertical movement will cause a wedging or expanding action which is resisted within the concrete cap 14 so as to resist any pull or uplift which might otherwise occur.

It is to be understood that any geometrical figure could be used for the truncated section 18 of the pile member 11. FIG. 5 is a cross-sectional view showing the truncated section as having a pyramid shape, FIG. 6 shows the truncated section having a rectangular or square shape 26, while FIG. 7 discloses a multisided geometrical figure 28.

Referring now to FIG. 8, there is shown a group of

piles

30, 31, 32 and 33 which include truncated sections as described above. However, in this particular configuration, the entire group of piles is surrounded by a circular tension material such as cage 35. It is obvious that any desirable number of piles could be used depending upon the specific requirements.

FIG. 9 is illustrative of a section of a concrete pile cap having piles 39 and 41 associated therewith.

It will be appreciated that any number of these piles may be used with the footing or concrete pile cap as necessity dictates.

Having described my invention by means of an illustrative example in the above discussion and accompanying drawings, it is to be understood that such example is not intended to limit the scope of the invention.

1 claim:

1. A method of forming an uplift anchorage structure which comprises driving at least one wooden pile into the ground,

cutting a kerf in a substantially horizontal plane to a predetermined depth in said wooden pile at a predetermined depth below the top of said pile,

cutting an inverter frustum of a cone in said pile extending integrally from the outer circumference of said pile above said kerf to the inner termination of said kerf,

placing a metallic reinforcing cage about said truncated section, and

pouring a concrete pile cap about the upper part of said pile which embraces said truncated section and said reinforcing cage.

2. The method of claim 1 wherein said metallic cage includes a plurality of anchor bolts extending outwardly from the upper part of said concrete cap.

3. A method of forming an uplift anchorage structure which comprises driving at least one wooden pile into the ground,

cutting a kerf in a substantially horizontal plane to a predetermined depth in said wooden pile at a predetermined distance below the top of said pile, cutting an inverted frustum of a pyramid in said pile extending integrally from the outer circumference of said pile above said kerf to the inner termination of said kerf,

placing a metallic reinforcing cage about said truncated section, and

pouring a concrete pile cap about the upper part of said pile which embraces said truncated. section and said reinforcing cage.

I ZIThe method of claim 3, wherein said metallic Cag I

Claims

1. A method of forming an uplift anchorage structure which comprises driving at least one wooden pile into the ground, cutting a kerf in a substantially horizontal plane to a predetermined depth in said wooden pile at a predetermined depth below the top of said pile, cutting an inverter frustum of a cone in said pile extending integrally from the outer circumference of said pile above said kerf to the inner termination of said kerf, placing a metallic reinforcing cage about said truncated section, and pouring a concrete pile cap about the upper part of said pile which embraces said truncated section and said reinforcing cage.

3. A method of forming an uplift anchorage structure which comprises driving at least one wooden pile into the ground, cutting a kerf in a substantially horizontal plane to a predetermined depth in said wooden pile at a predetermined distance below the top of said pile, cutting an inverted frustum of a pyramid in said pile extending integrally from the outer circumference of said pile above said kerf to the inner termination of said kerf, placing a metallic reinforcing cage about said truncated section, and pouring a concrete pile cap about the upper part of said pile which embraces said truncated section and said reinforcing cage.

4. The method of claim 3, wherein said metallic cage includes a plurality of anchor bolts extending outwardly from the upper part of said concrete cap.