US1746848A - Earth anchor - Google Patents

Description

w. A BATES EARTH ANCHOR Feb. 11, 1930.

Filed' Aug. 23, 1928 Patented Feb. 11, 1930' UNITED STATES PATENT ori-*fica WALTER BATES, F GARY, INDIANA, ASSIGNOR '.II'()l WALTER BATES STEEL OOR- PORATION, 0F GARY, INDIANA, A CORPORATION OF DELAWARE N EARTH ANCHOR Application led August 23, 192B. Serial No. 801,477.

present invention relates to earth an- A further object is to provide an improved method of anchoring a member within the l earth.v

A further object is to provide an improved method of anchoring members within. the earth.

Further objects will appear .as the description proceeds.

Referring to the drawings- Figure 1 represents a tower having its legs secured by means of earth anchors embodying the principles of the present invention;

Figure 2 is a view shown on a larger scale than that of Figure 1, showing the earth l anchor inserted in the earth and before it has been expanded into gripping relationshipwith the earth;

embodying the principles of the present invention in expanded gripping relationship I with-the earth and having a section of the' tower secured to said earth anchor; and .Figure 4. shows a slight modication. For the purpose ofillustrating the present invention, a tower 10 has been illustrated, which tower has a plurality of legs 11-11, which legs are illustrated as being angles. It will be understood of course that the cross'- sectional contour of the legs 11-f11 may take any preferred form and the anchor comprising the present invention will have a correscription, however, an angular form of leg will be described.

The earth anchor comprising the present invention comprises a tube 12 provided with a plurality of slits 13--13 extending longi- Figure 3 is a view showing an earth anchorv spending form. For purposes'of this de tudinally thereof, providing lacings .1a- 14. Said slits 13-13 should preferably bero equal length, equally spaced around the periphery of the tube 12 and equally spaced from the extremities of said tube 12. Said slits should terminate a short distance away from the bottom end of said tube 12, leaving a band 15 at the lower end of said tube. Above said slits 13-13 the tube is imperiorate for a considerable distance, as indicated by the numeral 16. The top portion of the tube 12 is formed for the attachment of a leg 11. In the-embodiment illustrated in Figures 2 and 3, substantially one-half of the tube has been cut away and the remaining portion has been' swaged into angular lform .having two walls 17 and 18.7 Said walls 17 and 18 are provided with bolt holes 19-19 forV attachment to corresponding legs 11-11 of the tower 10. In the embodiment in Figure 4, the top portion ofthe tube is not lcut away, sai/d top portion being merely swaged to provide the iat walls 20 and 21 disposed in angular relationship with one another, which walls 20 and 21 areprovided with the bolt holes 19.-

The hole inthe earth in which the tube 12 is mounted may be of substantially. the same diameter as the tube. 12, or may be larger if preferred. In either case, after the tube 12 has been inserted into the earth, a charge of dynamite is lowered into said tube and disposed within the lacings 14-14 near the bottom end of said tube. The dynamite the lacings 14-14, substantially as shown in Figure 3. Concrete is then poured down through thetube 12, andif said tube is disposed in a hole of greater diameter than-said tube, said concrete will also be poured down said whole outside of said tube.. Said concrete will forma ball, indicated by the numeral 22, within the region provided by theexplosion of the dynamite. Regardless of the relative diameters of the tube 12 and the hole in which it is disposed, said concrete will iiow out around the lacings 14-14, providing a rm grip upon the tube 12. As appears from an inspection of Figure 3, the

force of the explosion is not suicient to disrupt the lacings 14.--14. Y

The earth anchor yillustrated and described is -strong both in tension and com- 5 pression. A decided advantage of the pres#4 ent invention is that the lacings` 14-14, after having been expanded by the explosion, would tend to retain the earth until the concrete is poured, a vdecided advantage especiaL ly in soft or marshy ground.

Though certain preferred embodiments of the resent'in'vention have been described in detail, many modifications will occur to those 'skilled in the art. It is intended to 15 cover all such modifications that fall within the scope of the appended claims. .What is claimed `is- I 1. The method of anchoring which consists of expanding the lacin of a slitted' zo tube intermediate of the lengt thereof within the earth by means of an explosion where? by to force back said earth and to expand a said lacings into position to keep back said Y earth, and pouring concrete or the like into said tube to fill the recess provided b said exploding operation and to imbe said lacings. y

2. An earth anchorage comrising a tube disposed within the earth, sai tube having Y ao intermediate of its length but adjacent to one of its extremities lacings disposed outward-'i ly ofthe diameter of sald tube' and a concrete ball disposed and embedding said lacings. 3; he method of anchoring which comprises mounting a tube within aholein the earth, exploding a char e A within an embedded portion of said tu e to expand por-v tions thereof without vdisrupting the same 4o and to force back the earth adjacent to said'.

ortions, and -lling the region provided y'said exploding operation withf concrete or the like. t

Signed at Gary,fIndiana, this 20th day of 4e Aug., 1928.

- WALTER BATES.

Images