AUGER GROUTED DISPLACEMENT PILE

• US 20100054864A1
• Filed: 10/15/2009
• Published: 03/04/2010
• Est. Priority Date: 09/08/2006
• Status: Active Grant

• Current Assignee: Ben Stroyer
• Original Assignee: Ben Stroyer
• Inventors: Stroyer, Ben
• Granted Patent: US 8,033,757 B2
• Time in Patent Office: Days
• US Class Current: 405/233
• CPC Class Codes: E02D 5/52 Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
• CPC Class Codes: E02D 5/56 Screw piles placing piles by screwing down E02D7/22

Abstract

Disclosed in this specification is a method and apparatus for placing a helical pile in the soil with minimal disturbances to the soil. The helical pile has an elongated pipe with a central chamber. The pipe has a helical blade with an opening in the trailing edge of the blade where grout is extruded. The grout fills those portions of the soil which were disturbed by the blade. Advantageously, those portions of the soil which were not disturbed by the blade are not infused with grout.

Claims

1. An auger grouted displacement pile comprising

an elongated pipe with a hollow central chamber, the pipe having a top section and a bottom section,

the bottom section further including a soil displacement head with:

at least one lateral compaction plate for forming a bore diameter with a regular diameter, the plate having a diameter that is greater than the pipe diameter;

a helical blade coiled about the lateral compaction plate, the helical blade having a leading edge and a trailing edge, the bottom section further including an opening, proximate to the trailing edge, in fluid communication with the central chamber, the helical blade having a first handedness configured to move material in the direction of the top section;

a deformation structure disposed above the lateral compaction plate for cutting into the bore diameter after it has been compacted by the lateral compaction plate, thus forming irregularities in the bore diameter.

2. The auger grouted displacement pile as recited in claim 1, the top section further including a helical auger having a second handedness which is opposite the first handedness, the auger being configured to move material toward the bottom section.

3. The auger grouted displacement pile as recited in claim 1, wherein the helical blade has a thickness that is substantially equal over its width.

4. The auger grouted displacement pile as recited in claim 1, wherein the blade surface is solid such that there is no opening in the blade surface.

5. The auger grouted displacement pile as recited in claim 1, wherein the opening is in the trailing edge of the helical blade.

6. The auger grouted displacement pile as recited in claim 1, wherein the opening is in the trailing edge of the helical blade and is an elongated opening.

7. The auger grouted displacement pile as recited in claim 6, wherein the elongated opening has a thickness that is substantially equal over its width.

8. The auger grouted displacement pile as recited in claim 6, wherein the elongated opening has a width that is at least half of the trailing edge width.

9. The auger grouted displacement pile as recited in claim 6, wherein the elongated opening in the trailing edge has a thickness that is at least 25% of the trailing edge thickness.

10. The auger grouted displacement pile as recited in claim 1, wherein the opening is in the pipe and is proximate to the trailing edge of the helical blade.

11. The auger grouted displacement pile as recited in claim 1, wherein the bottom section terminates in a point.

12. The auger grouted displacement pile as recited in claim 1, where the helical blade further comprises a mixing fin.

13. The auger grouted displacement pile as recited in claim 2, wherein the diameter of the helical auger is less than the diameter of the helical blade of the soil displacement head.

14. The auger grouted displacement piled as recited in claim 1, wherein the deformation structure is disposed on a surface of the helical blade.

15. The auger grouted displacement pile as recited in claim 1, wherein the top section further comprises a first boss coupling flange perpendicular with respect to the longitudinal axis of the pipe.

16. The auger grouted displacement pile as recited in claim 15, further comprising

a second elongated pipe with:

a second boss coupling flange transverse with respect to the longitudinal axis of the second elongated pipe;

the first boss coupling flange of the first elongated pipe and the second boss coupling flange of the second elongated pipe being joined to one another by fasteners that are parallel with respect to the longitudinal axis of the longitudinal axis of the second pipe.

17. The auger grouted displacement pile as recited in claim 16, the top section further including a helical auger having a second handedness which is opposite the first handedness, the auger being configured to move material toward the bottom section.

18. The auger grouted displacement pile as recited in claim 16, wherein the second elongated pipe includes a second helical auger coiled about the second elongated pipe.

19. The auger grouted displacement pile as recited in claim 16, wherein the second elongated pipe has a smooth surface.

20. The auger grouted displacement pile as recited in claim 18, wherein the second elongated pipe further includes a third boss coupling flange, the displacement pile further comprising a third elongated pipe with:

a fourth boss coupling flange transverse with respect to the longitudinal axis of the third elongated pipe;

the third boss coupling flange of the second elongated pipe and the fourth boss coupling flange of the third elongated pipe being joined to one another by fasteners that are parallel with respect to the longitudinal axis of the longitudinal axis of the second pipe.

21. The auger grouted displacement pile as recited in claim 20, wherein the third elongated pipe has a smooth surface.

22. The auger grouted displacement pile as recited in claim 1, wherein the deformation structure is disposed on a surface of the helical blade and coils about the elongated pipe, the deformation structure having a height that varies over its length as it coils about the elongated pipe.

23. A method for placing an auger grouted displacement pile in a supporting medium comprising the steps of

placing an auger grouted displacement pile on a supporting medium surface, the pile having a structure as recited in claim 1;

rotating the auger grouted displacement pile at a rate of rotation such that the helical blade pulls the auger grouted displacement pile into the supporting medium;

adding grout into the top section of the auger grouted displacement pile as the auger grouted displacement pile is pulled into the supporting medium at a rate that is proportional to the rate of rotation of the auger grouted displacement pile such that grout is extruded through the opening of the auger grouted displacement pile; and

allowing the grout to set while the auger grouted displacement pile is still embedded in the group.

24. The method as recited in claim 23, further comprising the step of connecting a second elongated pipe to the first elongated pipe, thus permitting the auger grouted displacement pile to be disposed to a greater depth prior to the step of allowing the grout to set.