Title:
Transload base for road joints
United States Patent 2038605


Abstract:
The present Invention relates to road joints and more particularly to load transmission base units for serving as supports for removable core units for forming air expansion voids between adjacent concrete sections of a road or similar concrete constructions. It is an object of this invention...



Inventors:
Robertson, Robert R.
Application Number:
US71514434A
Publication Date:
04/28/1936
Filing Date:
03/12/1934
Assignee:
TRANSLODE JOINT COMPANY
Primary Class:
International Classes:
E01C11/08; E01C11/14
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Description:

The present Invention relates to road joints and more particularly to load transmission base units for serving as supports for removable core units for forming air expansion voids between adjacent concrete sections of a road or similar concrete constructions.

It is an object of this invention to provide an improved load transmission base unit for an air expansion road joint.

13 It is also an object of this invention to provide an air expansion joint forming mechanism including a base unit constructed of sections slidably interfitting with one another and having anchoring means formed thereon whereby loads 1.- from adjacent sections of the concrete construction may be transmitted from one section to another.

It is a further object of this invention to provide a road joint forming mechanism for forming either expansion or contraction joints, said mechanism including improved load transmission base members one or more of which is provided with anchoring means to be embedded in concrete to permit a section or sections to be moved transversely of the road joint with the expansion and contraction of the concrete road sections due to temperature changes.

It is furthermore an object of this invention to provide a road joint mechanism including a load transmission base having load transmission anchor shoes shiftably mounted therein for supporting a void forming core unit in position.

It is an important object of this invention to provide a road joint forming mechanism with a load transmission base unit consisting of interfitting base sections having anchoring means forming thereon whereby the base sections are adapted to be transversely shifted with respect to one another due to the expansion and contraction of road sections due to temperature changes.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings: Figure 1 is a transverse vertical fragmentary section taken through a portion of a concrete road through an expansion joint forming a part thereof and including an improved load transmission road joint base embodying the principles of this invention.

Figure 2 is a fragmentary top plan view of an expansion joint forming unit having parts thereof broken away and parts shown in sections.

Figure 3 is a fragmentary side elevation of one of the load transmission anchor strips removed from the load transmission base unit. 6 Figure 4 is a reduced fragmentary vertical detail section taken on line IV--IV of Figure 1 to show the arrangement of the anchoring wings forming a part of one of the base sections.

Figure 5 illustrates a fragmentary vertical detail section taken through a section of a concrete road enclosing an expansion joint forming unit including a modified form of load transmission base for supporting a modified form of void forming core unit. 1i Figure 6 is a fragmentary horizontal sectional view taken on line VI-VI of Figure 5 with the concrete omitted and with parts broken away to show the details of construction.

As shown on the drawings: Figures 1 to 4 of the drawings illustrate a road expansion joint forming mechanism including an improved load transmission base, which as illustrated in Figure 1, is supported on a road subgrade I. Formed upon the subgrade I is a concrete upper or crown section of the road.

The crown section of the road is divided by means of a longitudinally disposed center joint and by transversely disposed contraction and expansion joints which divide the upper portion of the road into a plurality of adjacently positioned concrete sections 2 which are permitted to expand and contract with temperature changes.

The improved load transmission base unit is constructed of two transversely shiftable interfitting side units A and B. The base side unit A is constructed of comparatively light weight sheet metal which is bent into form to provide a socket section comprising a base plate 3 having temporary stop lugs or fingers 4 struck upwardly therefrom at spaced intervals. The base plate 3 is curled upwardly to form a bight portion 6 and a top plate 6 which is spaced above the base plate 3 and projects beyond the inner margin of said base plate 3. The inner margin of the top plate 6 is provided with a plurality of spaced notches leaving spaced portions which are bent upwardly at substantially right angles from the top plate 6 to form retaining flanges 7.

The base side section B comprisys a base plate of a heavy piece of metal 8 whiclhhas the inner longitudinal margin thereof projecting into the space 9 provided in the base side section A. The projection of the base plate 8 into the chamber * is. stopped when the side edge of the base a plate contacts the stop lugs 4 as clearly illustrated in Figure 1. This arrangement permits a portion of the base plate 3 to extend beneath the base plate 8. The outer longitudinal margin of the heavy base plate 8 is provided with a plurality of spaced notches 10 leaving dove-tail portions which are bent upwardly at substantially right angles, to provide anchoring blades or wings II which form a row of main anchoring members for the base section B. Struck upwardly from the outer marginal portions of the base plate 8 and staggered with respect to the main anchoring blades II are a plurality of spaced auxiliary anchoring blades 12 which are of dove-tail shape. Both the main and auxiliary anchoring blades II and 12 respectively, are adapted to be embedded in concrete as clearly illustrated in Figure 1 to securely anchor the load transmission base section B in a road section 2, whereby the base plate 8 is adapted to have sliding interfltting engagement with the base section A when the concrete section 2 in which the anchor blades I I and 12 are embedded expand or contract due to temperature changes.

Suppoited on the base plate 8 and spaced above it is an upper base plate 13 of lighter weight sheet metal which has a downwardly deflected strip 14 the margin of which is deflected outwardly to form a supporting strip or flange 15 which seats upon the top surface of the base plate I and has the longitudinal edge thereof abutting against the inner side of the auxiliary anchoring blades 12. The supporting strip 15 is spot-welded or otherwise secured rigidly to the base plate 8. The inner margin of the top plate 13 of the base section B is provided with a plurality of spaced notches and the material between the notches is bent upwardly to provide stop flanges IS.

The two interfltting base sections A and B are supported on the subgrade I in interfitting relation and have supported therein a pair of oppositely positioned interfltting anchoring shoes each of which as clearly illustrated in Figure 3 comprises a vertical or upright plate or strip 17 having the lower margin deflected outwardly at substantially right angles to form a plurality of spaced supporting feet or flanges I8 which are separated 'by spaces or openings 19 permitting the supporting feet 18 -of one anchoring plate II to project beneath the opposite anchoring plate IT as clearly illustrated in Figure 2. The supporting feet II of the anchor plates II are reversed and staggered with respect to one another and project into the chamber 9 of the base section A and into the chamber 20 formed in the base section B. As clearly illustrated in Figure 3 the notches 19 provided between the supporting feet I1 of the anchor plate IT extend a short distance above the top surfaces of the feet 18 to permit the notched inner margin of the base top plates S and II to eat in the anchoring plate I1 with the retaining flanges 1 and 16 projecting upwardly between the spaced plates 17 as clearly illustrated in Figure 1.

The anchoring plates 11 which project upwardly above the load transmission base sections A and B are spaced apart for the reception of removable core plates 21, the lower margins of which are seated between the respective retaining flanges 7 and 16 and against the inner faces of the plates 17 whereby the core plates 21 have the lower margins thereof properly spaced to provide an expansion void therebetween. The 7 upper margins of the core plates 21 may be connected by any suitable type of removable core cap similar to the arrangement illustrated in Figure 5 which will hereinafter be described.

As illustrated in Figure 3 each of the anchoring plates I1 has the upper margin thereof cut s at spaced intervals and the material resulting from said cuts is deflected outwardly to provide a plurality of anchoring blades or wings 22 which are adapted to be embedded in the concrete section 2 permitting the load from adjacent sections to be transmitted from one section to another.

In the improved form of road expansion joint forming mechanism illustrated in Figure 1, it will be noted that loads from adjacent sections of the road are not only adapted to be trans- 16 mitted from one section to another by means of the anchor plates IT but by the load transmission base section B which is anchored in one of the road sections 2 by means of the main and auxiliary anchoring blades II and 12 whereby the base plate 8I is adapted to be shifted with respect to the base section A with the expansion and contraction of the road sections in which the base unit B is anchored. The stop lugs 4 provided in the base plate 3 are simply used as a 2S temporary expedient for limiting the inward movement of the base plate 8 into the chamber I.

With the expansion of the road section in which the anchoring blades II and 12 are anchored, the base plate 8 slides inwardly over the base plate I and will deflect the stop lugs 4 downwardly or shear them off.

With the improved expansion joint forming mechanism illustrated in Figures 1 to 4 inclusive, it will be noted that the base section is constructed to permit loads from one concrete section 2 to be transferred into an adjacent section even when the anchoring shoes 17 are omitted.

It will thus be noted that with the improved joint mechanism that loads may be transferred from one section to an adjacent section by both the anchoring shoes and by means of the improved load transmitting base unit B.

Figures 5 and 6 illustrate a modified form of load transmitting unit for supporting a core form- -45 ing unit in position between adjacent concrete sections of a road.

In this form of the device, the base unit sl adapted to be seated upon the subgvade I and consists of two transversely shiftable interfltting base sections C and D. The base section C comprises a comparatively heavy sheet metal base plate 23 having one longitudinal margin thereof cut out to provide a plurality of spaced notches separated by spaced portions which are bent up- 65 wardly at substantially right angles to provide main anchoring wings or blades 24. Struck upwardly from the base plate 23 is a row of auxiliary anchoring blades or wings 21 which are formed in a row parallel to the main anchoring blades or wings 24. As clearly illustrated in Figure 6, the main and auxiliary anchoring blades or wings 24 and 25 are staggered with respect to one another. Spot-welded or otherwise rigidly secured to the top surface of the base plate 23 85 adjacent the inner side of the auxiliary anchoring blades 21 is an angle bracket or support 26 which is integrally formed on one longitudinal margin of an upper base plate 27 constructed of light weight sheet metal and disposed substantially parallel to the lower, heavier base plate 23.

The base section D comprises a base plate 21 constructed of substantially heavy weight sheet metal and is slidably supported transversely upon the top surface of the base plate 23 and projects beneath the upper base plate 21 as clearly illustrated in Figure 5. The outer longitudinal margin of the base plate 28 is provided with spaced notches leaving a plurality of spaced sections which are deflected upwardly at substantially right angles to form main anchoring blades or wings 28. Also struck upwardly from the base plate 28 are a plurality of auxiliary anchoring blades or wings 30 which are arranged in a row substantially parallel to the row of main anchoring blades or wings 29. As shown in Figure 6 the anchoring blades or wings 29 and 30 are staggered with respect to one another. Rigidly secured to the under side of the outer marginal portion of the top base plate 28 is the upper marginal flange of a deflected supporting strip 31 which has the lower flange thereof suported or resting on the subgrade 1. The supporting strip or foot member 31 serves to support the outer longitudinal portion of the upper base section 28 at a height substantially equal to the thickness of the lower base plate 23.

In this form of load transmission base unit, the two base plates 23 and 28 overlap one another and have the anchoring blades or wings thereof anchored in adjacent concrete sections 2 of the road. This arrangement permits the base plates to be moved transversely with respect to one another for the purpose of transmitting loads from one concrete section to another when the road sections expand due to temperature changes.

When the improved load transmission base unit is used in the construction of an air expansion joint for a road, a hollow core Unit is supported on the upper base plate 28 as clearly illustrated in Figure 5. The void forming core unit may be of any desired construction.

In the present joint, a core unit is used in combination with the base unit and is of the hollow, removable type comprising a grooved base 32 formed with a longitudinal middle ridge with grooves on opposite sides thereof in which the lower margins of removable core plates 33 are seaed.. The upper margins of the core plates 33 are deflected inwardly to afford shoulders upon which are temporarily seated angle members comprising mounting flanges 34/ and upright flanges 35. The Upright flanges 35 are held clamped against the upper margins of the core plates 33 by means of a corecap 36 which carries a centrally disposed downwardly projecting web or middle plate 31 which projects downwardly between the core plates and between the spacing flanges 38 secured vertically on the inner surfaces of the core plates 33. The spacing members 38 are staggered with respect to one another as clearly illustrated in Figure 6.

With the complete road joint former comprising the load transmission base unit and the void so forming core unit in position on the road subgrade, concrete. s poured upon the subgrade on opposite sides of the joint forming mechanism to embed the various-members thereof. After the concrete has been allowed to set a desired 05 amount, the core cap 38 together with the depending web or plate 37 thereof is pulled upwardly out of the concrete leaving the angle members 34-S3 with the base flanges 34 thereof embedded in the concrete while the upright flanges 35 project into the void or expansion space. With the removal of the separating or spacer plate 37 from between the core plates, the plates 33 are loosened from the concrete and are moved into the void and pulled upwardly out of the concrete leaving an expansion void or space between the concrete sections 2 of the road. The core base 32 is left in position.

After the removal of the void forming core unit members, the upright flanges 35 of the angle members are bent inwardly toward one another to receive an arched closure plate or bridge member upon which a filling of a bituminous material is deposited to close the cracks between the upper portions of the concrete sections 2. 'A construction similar to that just described may be found in my co-pending application for patent for a "Road joint mechanism with.void forming unit" filed November 17, 1933, U. 8. Serial No. 698,437.

In the form of the device illustrated in Figures 16 1 to 4 inclusive, the load transmission base unit has associated therewith anchoring angles which interfit one another, with the base flanges or feet 18 reversed and staggered with respect to one another. In the form of the device illustrated in Figures 5 and 6, the anchoring shoes are omitted and the void forming core unit is supported directly upon the load transmission base unit.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention, and it is tbhrefore not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims. I claim as my invention: 1. A road joint forming mechanism comprising a load transmission base unit having anchoring means struck therefrom, and a void forming core unit removably supported on the base unit.

2. A road expansion joint forming mechanism comprising a base unit, staggered anchoring means struck therefrom, and a core unit supported on the base unit. 3. In a road joint forming mechanism of the class described, the combination with a base unit, of interfltting angle members shiftably supported thereon, anchoring means on the angle members for anchoring the angle members in adjacent road sections, and a void forming core unit supported on the base unit between the angle members.

4. In an expansion joint forming mechanism the combination with a base unit having anchoring means thereon, of anchoring members' shiftably supported in the base unit and interfitting one another, and a void forming core unit supported on the base unit between the anchoring members. 5. In a road joint forming mechanism a base unit comprising a hollow base section, a second base section transversely shiftable therein, and anchoring means struck from the second base section. 6. A road joint forming mechanism including in combination a base unit comprising a pair of transversely shiftable interfitting base sections having rows of staggered anchoring means formed thereon for the transmission of loads from one concrete section to an adjacent section through the base unit.

7. A road expansion joint forming mechanism including in combination a load transmission base unit comprising a chambered base section, a base plate shiftably engaged therein, and rows of anchoring means on the base plate for transmitting loads across the joint from one road section to another.

8. A road expansion joint forming mechanism _ · · I including in combination a base unit comprising interfltting transversely shiftable base sections, and anchoring means integrally formed in staggered relation thereon for transmitting loads between adjacent concrete sections of a road.

9. A road expansion joint forming mechanism comprising in combination a base unit consisting of a chambered base section, a base plate transversely shiftable therein and projecting therefrom, and a plurality of staggered rows of anchoring members formed on the base plate and projecting upwardly therefrom to be embedded in concrete for transmitting loads from one concrete road section to another through the base unit.

10. In a road expansion joint forming mechanism a base unit comprising telescoping base sections having anchoring means formed thereon to be embedded in concrete road sections for transmitting loads from one road section to another through the base unit, and load transmission anchor shoes engaged in the base sections and alternately anchored in adjacent road sections.

11. A road expansion joint forming mechanism including in combination a base unit comprising transversely shiftable interfltting base sections, and a plurality of staggered rows of spaced anchoring members formed on one of said base sections to be embedded in concrete for the transmission of loads from one road section into an adjacent section through the interfitting base sections.

12. An expansion joint forming mechanism Including in combination a base unit comprising a pair of overlapping base plates transversely shiftable with respect to one another, and a plurality of staggered rows of anchoring means on said base plates to be embedded in concrete road sections for transmitting loads from one road section to another through the base unit.

13. In a road expansion joint forming mechanism the combination with a load transmitting base unit, of load transmitting members transversely shiftable with respect to the base unit and each comprising a plate, a plurality of spaced supporting members projecting outwardly from one side thereof, and a plurality of anchor members projecting outwardly from the opposite side thereof.

14. A road expansion joint forming mechanism including in combination a load transmission base unit, a void forming core unit mounted thereabove, an anchor means between the base unit and the void forming core unit, said anchor means comprising interfitting reversed angle members having a plurality of anchoring blades formed thereon and projecting In opposite direction from the void forming core unit.

15. A road expansion joint forming mechanism including in combination a load transmission device comprising a plate, a plurality of spaced supporting members Integrally formed on the lower margin thereof and projecting from one side of the plate, and a plurality of anchoring blades struck from the upper margin of the plate and projecting outwardly from the opposite side of the plate.

16. A road joint former including in combination a base unit adjustable in width and having anchoring means thereon for transmitting loads between adjacent concrete road sections in which the base unit is embedded, and alternately reversed anchor members alternately anchored in the adjacent road sections and shiftably engaged in the base unit. 17. A road joint former including in combination a core unit, and a plurality of reversed telescoping anchoring members disposed transversely of the core unit.

18. A road joint former including in combination a core unit, a plurality of reversed slidably interfitting members disposed transversely of the core unit, and anchoring means on said members to be embedded in concrete on opposite sides of the core unit. 19. A road joint former including in combination a load transmission device comprising a plate having spaced members on one margin thereof and anchoring members on an opposite margin. 20. In a road joint former, a load transmitting means comprising a pair .of plates, spaced members formed on said plates, with the members of one plate reversed and slidably interfltting between the members of the other plate, and anchoring means on said plates to be embedded in adjacent sections of a concrete road to cause transverse shifting of the plates due to the expansion or contraction of the road sections resulting from temperature changes. 85 ROBERT R. ROBERTSON.