US2192509A - Interlocking pile construction - Google Patents

Description

.MrchS, 1940.

H N. SIMPSON INTERLOCKING PILE CONSTRUCTION Original Filed April 12, 1957 mm m .m... u moan w Patented Mar. 5, 1940 UNITED STATES 136,404. Divided and this application Decemher 5, 1939, Serial No. 307,617

3 Claims.

The invention herein described is also described, but not claimed, in my co-pending application for patent on Interlocking pile construction, filed April 12, 1937, Serial No. 136,404, of which this application is a division.

My invention herein described relates specifically to a type of interlockable reinforcement, which I deem convenient to term crib-like, to be used in concrete pile construction, and I believe the same to be preferable in some types of pile construction. A particular object of this invention is to provide interlockable reinforcements for concrete piles which may be fabricated from ordinary railroad rails, I-beams, or similar structural elements.

The details of construction and the use of my crib-like reinforcements are hereinafter described with reference to the accompanying drawing; in which Figure 1 shows a side elevation of a portion of a railroad rail which has been slitted obliquely in preparation for the lateral expanding of this rail so that it may be formed into my crib-like reinforcement Figure 1a is transverse section on the line IAIA of Figure 1;

Figure 2 is a side elevation of the'same rail after it has been laterally expanded;

Figure 3 is a transverse section taken on the line 3-3 of Figure 2.

Figure 4 is a perspective View of one unit of my crib-like interlocking reinforcement fabri cated from the rail after the same has been laterally stretched or expanded as shown by Figur 2; and

Figure 5 is a transverse section taken through a concrete pile incorporating my crib-like reinforcement.

Two lengths of railroad rails having a head a and base or flange b, as shown by Figure l, have oblique slits c, d, e, 1, made in their webs; these slits being parallel, equal-spaced and of equal length. The base or flange b, is formed into a channel-shaped coupling element as shown in Figure 1a.

After the oblique slits have been cut the rail pieces are heated and they are then expanded, in which expansion the slits c, d, e, i, become widened into spaces designated by the same letters. The head and flange of rail pieces are then connected by lattice bars g, h, i, 9' as shown in Figure 2.

One of the expanded rail pieces is then cut' longitudinally through the center of the head a and the lattice bars g, h, i, a, but base of flange I), is not cut. The two halves of the lattice bars are then bent outwardly to produce laterally oifset ribs arranged in crib form as shown by Figure 4. The other rail piece is also slit and expanded as mentioned, and is also cut longitudinally through the center of the lattice bars, but in this case the cut is extended through the channel-shaped flange 17, while the head a-is left uncut. This rail piece is also shaped into crib 10 form, similar .to that shownby Figure 4. The two halves, of the flange of this rail piece are straightened out'flat as shown at l, in Figure 5.

The two rail pieces slitted and shaped as mentioned constitute the units of my reinforcement. These units are then arranged inopposition as shown in Figure 5, and so as to overlap at their extremities, which are then securely connected, preferably welded together, so as to form a rigid crib-like reinforcement as shown by Figure 5 in which the two units of my reinforcement ar designated m and n.

The reinforcement is now complete and may be incorporated in the concrete pile as also shown 5 in Figure 5.

The laterally offset lattice bars g, h, i, a, of each unit will provide all reinforcement the concrete pile requires. f

The head a projecting exteriorly from the unit n, (Fig. 5) and the channeled base or flange b, of the unit m, constitute the coupling elements by which the reinforcements or similarly rein-' forced adjacentpiles may be coupled together.

The vabove-described method for fabricating my crib-like interlcckable reinforcement is merely such method as I deem convenient.

I claim: I

l. A unitary reinforcement for concrete piles composed of two units of crib-like form in crosss'ection, said units being oppositely arranged, each unit comprising a central longitudinal rib 40 havingtwo laterally-offset longitudinal ribs con nected therewith by an intermediate lattice web, the offset ribs of one unit being rigidly connected respectively to the offset ribs of the other unit, the central rib of each unit having a projecting coupling element adapted to be interlocked with a coupling element of the reinforcement of an adjacent pile.

2.A unitary reinforcement for concrete piles composed of two units of rectangular crib-like form in cross-section, said units being oppositely arranged, each unit comprising a central longitudinal rib having two parallel laterally-offset longitudinal ribs connected therewith by an intermediate lattice web, the offset ribs of one'unit 55 being rigidly connected respectively to the offset ribs of the other unit, the central rib oi! each unit having a projecting coupling element adapted to be interlocked with a coupling element of the reinforcement of an adjacent pile.

3. In combination with a concrete pile, a unitary reinforcement comprising parallel longitudinally extending members, one member including a coupling head having a neck of smaller 10 cross-section than that of the head, said head extending beyond the surface of the pile, the other member including a coupling channel, said channel embedded in the material of the pile and formed to receive and interlock with a complementary coupling head, a pair of laterally ofiset longitudinal ribs connected to each of said members by a lattice web, and said ribs of one member rigidly connected respectively to said ribs of the other member.

HERMAN N. SIMPSON.

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