US2038605A - Transload base for road joints - Google Patents

Description

April 28, 1936 R R. ROBERTSON Filed March 12, 1954 7 .2 vsheetssheet v2 MJIIWITTHIWU "umylmllif Patented Apr. 28, 1936 UNIT-ED STATES www PATENT OFFICE,

. 72,028,665 o 'raANsLoAn Bass fronfao'sn Lionvrs Robert s,..aobemonfsohieamfzsu.,asignar to The Translodemnlntiiompany, Chicago, Ill.,

'a corpr'ationotslllinois v Application Maren 12, 1934, serial 110.115,144

zo Claims. (0194-18) The present invention relates to road Joints and more particularly to load transmission 4base units for serving as supports for removable'y core units for forming air expansion voids betweenadjacent 5 concrete sections oi' 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. I lo It is also an object of lthis invention to provide an'air expansion Joint forming mechanism Aincluding a base unit constructed of sections slidably interitting with one another and having anchoring means' formed thereon wherebyloads 1.1 from adjacentsections of the concrete construction may be transmitted from one section to another.

It is a further object of7 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 contractionof the concrete road sections due to temperature changes.

It is'iurthermore an object of this invention to provide a'road joint mechanism'including a load 30. 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 interi'ltting 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 contrac- 40 tion of road sections due to temperature changes.

Other and further important objects of this invention will be apparentfrom the disclosures in the speciiicationeand the accompanying drawinss.

The invention (in a preferred form) is illustrated in the drawings andhereinafter morefully described. i 1

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. l

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

Figure 3 is a fragmentary side elevation of one of the load transmission anchor strips removed from the load transmission base unit. f y

Figure 4 is a reduced fragmentary vertical detail section taken online IV--IV of Figure 1 to show the arrangement of the anchoring wings forming a part of one of thebase sections.

Figurer 5 illustrates a. fragmentary vertical 10 detail section taken through a section of a concrete road enclosing an expansion IJoint forming unit including a. modiiied form of load transmission base for supporting a modified form of void forming core unit. f I3 Figure 6 is a fragmentary horizontalsectionai view taken on line VI--VI of Figure 5 with the concrete omitted and with parts brokenaway to show the details of construction.

As shown on the drawings:

VFigures l to 4 of the drawings illustrate a `road expansion joint forming mechanism including an improvedload transmission base, which as illustrated in Figure 1, is supported on a road suo-` grade I. crete upper or crown section of the ,'road. The crown section of the road is divided by means of a longitudinally. disposed center joint andby transversely disposed contraction and 'expansion joints which divide the upper portion lof 30 the road into a plurality of adjacently positioned concrete sections 2 which are permitted to expand and contract with temperature changes. f

'I'he improved load transmission base unit is constructed offtwo transversely shiftable inter- .-35 fitting side units A kand B. The base side unit-A is constructed of comparatively light weight sheet metal which isbent into form to provide a socket section comprising a base lplaten` having temporary stop lugs oriingers 4 struck upwardly 40 therefrom at spaced intervals. The base -plate 3 is curled upwardly to form a bight portion Sand a top plate 6 which is spaced above the base plate 3 and projects beyond the inner margin of vsaid base plate 3. The inner margin oi the top plate .45 6 is provided with a plurality oi!v spacednotches leaving spaced portions which are, bent upwardly at substantially right angles from the top plate 6 to form retaining flanges 1. l

The base side section B compris s abase `plate 50 of a heavy piece-of metal whic `,has 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 l is. stopped when the side edge of the base Formed upon the subgrade 'i is a con- 25 tion of the base plate 8 to extend beneath the base plate 8. the heavy base plate 8 is provided with a plurality of spaced notches -Ill 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 I2 which are of ldove-tail shape.

Both the main and auxiliary anchoring blades Il and I2 respectively, are adapted to be embedded in concrete as clearly illustrated in Figure l to -securely anchor the load transmission base section B in a road section 2, whereby the base plate 8 is adapted to have sliding interiltting engagement. with the base section A'when the concrete section 2 in which'the anchor blades Il and I2 are embedded expand jor contract due to temperature changes. i

Supported on the base plate 8 and spaced above it isan upper base plate I8 of. lighter weight sheet metal which has aV downwardly deflected strip I8 the margin of which is deflected outwardly to forma supporting strip or flange. I5 which seatsupon the top .surface of the base plate.

8 and has the longitudinal edge thereof abutting against the inner side of the auxiliary anchoring blades I2. The supporting strip I5 is spot-welded or otherwise secured rigidly to the base plate 8. The inner margin of thetop plate I8 oi' the base section B is provided with ayplurality of spaced notches and the material between the notches is bent upwardly to provide stop iianges I8.

The two interfitting base sections A and B are supported on the subgrade I. in interiltting relation and have supported therein a pair of oppositely positioned intertting anchoring shoes each of which as clearly illustrated in Figure 3 comprises a vertical or upright plateor strip I1 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 I9 permitting the supporting feet I8 'of one anchoring plate I1: tol project beneath the opposite anchoring plate I1 as clearly illustrated in Figure 2. 'I'he supporting feet I8 of the anchor plates I1 are reversed and staggered with respect to one another and project into thechamber 8 of the base section A and into the chamber 28 formed in the base section B. As clearly illustrated in Figure' 3 the notches I8 provided between the supporting feet I8 of the anchor plate I1 extend a short distance above the top surfaces of the feet I8 to permit the notched inner margin of the base top plates 8 and I8 toseat in the anchoring plate I1 with the retaining flanges 1 and I6' projecting upwardly between the spaced plates I1 as clearly illustrated in Figure 1.

The anchoring plates I1 which project upwardly above the load transmission base sections A and B are spaced `apart for the reception of removable core plates 2|, the lower margins of which are seated between the respective retaining flanges 1 and I8 and against the inner faces of the plates I1 whereby the core plates 2l have the lower margins thereof properly spaced to provide an expansion void therebetween. The upper margins of the core plates 2| may be con- The outer longitudinal margin of y ing plates I1 has the upper margin thereof cut ,plate contacts the stop lugs! as clearly illustrated in Figure 1. 'I'his arrangement permits a porcap similary `to the arrangement illustrated in Figure 5 which'will hereinafter lbe described.

As illustrated in Figure 3 each of the anchorat spaced intervals and the material resulting from said cuts is deected outwardly to provide a plurality o fanchoring 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, vit` base unit B-is anchored. The stop lugs 4 provided in the base plate 8 are simply yused as a" -temporary expedient for limiting the inward movement of the base plate 8 into the chamber 8. With the expansion ofthe road section in which the anchoring 4blades Il and I2 are anchored.l the base plate 8 slides inwardly over the base plate 8 and -will deiiect the'stop lugs] fdownwardly or shear them oil'. A

. With the yimproved expansion joint forming mechanism illustrated in Figures 1 to 4 inclusive, it will be notedfthat thebase section is constructed to permit loads from one concrete section 2 to be transferred into an adjacent section even whenthe anchoring shoes I1 are omitted. It will thus be noted ,-that with the improved joint mechanismfthat loads may be transferred from one section to an adjacent section by both the anchoring shoes land by means of the improved load transmitting base unit B.

Figures 5 and 6 illustrate a modied form ol' v load transmitting unit for supporting a core forming unit in position between adjacent concrete sections of a road.

In this form of the device, the base unit is adapted to be seated upon the subgrade I and,V consists of two transversely shiftable interfittingbase sections C and D. The base section C comprises a comparatively heavy sheet metal base plate 28 having one longitudinal margin thereof cut `out to provide a plurality of spaced notches separated'by spaced portions which are bent upwardly Vat substantially right angles to provide main anchoring wings or blades 28. Struck upwardly from the base plate 28 is a row of auxil-` iary anchoring blades or wings 28 which are formed in a row parallel to the main anchoring blades or wings 28. As clearly illustrated in Figure 6, the main andl auxiliary anchoring blades or wings 28 and 25 are staggered with respect to one another. Spot-welded or otherwise rigidly secured to the top surface of the base plate 28 adjacent the inner side ofthe auxiliary anchoring blades 25' is anangle bracket or support 28 which is integrally rformed on one longitudinal margin of an upper base plate 2 1 constructed of light weight sheet metal and .disposed substantially parallel to the lower,- heavier base plate 28.

v The base section D comprises a base plate 28 constructed of substantially heavy weight sheet metal and is slidably supported transversely upon the top surface of the base plate 28 and projects V*gin of'y the base plate. 28 is provided with spaced notches leaving a lplurality ot spaced sections which are deflected upwardlyfat substantially right angles to form main anchoring yblades'or wings 2l, Also struck upwardly froml the base plate 2l are a plurality of auxiliary` anchoring bladesor wings 3,0 which are arranged fin arow substantially parallel to the row of main anchoring blades or wings. As shown in Figurel the anchoringblades orwings 28and 30 arefstagvgered with'respect 'to one another. Rigidlysecured to the under side of the outer marginalk portion of the top base plate 28 is the upper marginal flange of a'deflected supportingfstrip Il which has the Vlower iiange thereof suported or resting on the subgrade I. The supporting-,strip or foot member 3i serves to support the outer longitudinal portion of the upper basevsection 285at a height substantially 'equal to the thickness of the lower baseplate 23. y l 1 -In this form of load transmission base unit, the two base plates 23A and 28 overlap one ,another and have the` anchoring blades or wings thereof anchored-in adjacent concrete sections-2 of fthe road.l 4This arrangement permits the baseplates to be moved transversely with respect to'one another for the purpose of transmitting loads from one concrete section to Ianothery when the road sections expand due to temperature changes.

i 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 iny Figure 5. The void forming core unit may be 'of any desiredconstruction.k .l

In the present joint, a core unit is used in combination with the base unit and is of the hollow, removable type comprising va. grooved base 32 formed with a longitudinal middle ridge with grooves on opposite sides thereof in which the lower; margins,l ofgjremovable" core plates 33 are seated.v l The .upper .margins of the core.; plates 3l are deflected inwardly to afford shoulders upon which are.' temporarily seated angle members comprising mounting . anges 3,4/ and upright ilanges 3.5. )The upright iiangesy are held clampedagainst the upper. margins vof the-core plates 2l by means ,of a corelcap J6 which carries a: centrally disposed downwardly projecting web or middle plate 31 which projects downwardly between the core plates and between the spacing nanges 38 secured vertically on the inner surfaces ofthe core plates $3. The spacing members 38 are staggered withV respect to one another as clearly illustrated in Figure 6.

With the complete road joint former compris- Iing the load transmission base unit and the .void forming core unit in position on the road'subgrade, concreteis pouredupon the subgrade on opposite sides of the joint forming mechanism to embed the various members thereof. After the concrete has been vallowed to set a desired amount, the core cap together with thel depending web or plate -31 thereof is pulled upwardly out of the concretefleaving the angle members 34,- with the base flanges 34 thereof embedded inthe concrete while the upright anges 35 project into the void or expansion space. With the removal of lthe separating or spacer plate 31 from between thecore plates, the plates 33 are loosened from the concrete and are moved into, the void and pulled upwardly out of the ooncrete leaving an expansion void or space between `the concrete sections 2 ofthe road. ooi'e- 4.base32isleft in position. f i;` I* f f 1' lAfternthe removal of the void forming core unit members, :fethe upright iianges 35 oi'the angle* members are bent inwardly' toward oneanother i toreceivean arched closure plate or bridge memberupon which a filling of a bituminous mate- "rial is deposited to close the cracks between the ,upper .portions of the concretey sections 2., "A construction similar tothat' just described may be found inimyco-pending application for pat- .ent for a .Road joint mechanism withyoid forming tunit illedNovember'l'l, 1933, U.- S.'Serial No. 698,437. n.

. v Inthe form of the deviceillustrated in Figures' 1 to 4vinclusive, the load transmission baseunit hasiassociated therewith anchoring angles vwhich interit one another, with the base flanges or feet I8 .reversed andL staggeredv with respect to one another. In the form of the device illustrated in 'Figures 5 and 6, the anchoring shoes are omitted pose `to limit the patent granted hereon other-f wisel than necessitated by the scope of the apkpended claims.

l I claim asl my invention: l

l. A* road joint forming mechanism comprising a load transmission baseunit having anchoring ymeans struck therefrom, vand' a void forming `core yunitfremov'ably supportedon the base unit.

- 2'. A roads espansion joint forming k.mechanism comprising a base unit, staggered anchoring means struck therefrom, and avcore unit ysupported on the base unit.

3. In a road joint forming mechanism of the class described, kthe' combination "with (a `base unit, of interttingf angle members vshiftably supported thereon, anchoring `means on the angle `members for anchoring Athe angle members in adjacent road `sections,-andva void forming core unit supported .onf the base unit between the angle members.' y

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 intertting one'another, and a void forming core'unit supported on the base unit between the anchoring members. v

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.

vincluding in combination a. load transmission base unit comprising a chambered base section, a base plate shiitably engaged therein, and rows of 'anchoring means onthe base plate for transmitting loads across the joint from one lroad section to another. v i

l8. -A road expansion joint forming mec including in combination a -base unit comprising'intertting transversely shiftable base sections, and kanchoring means integrally formed in staggered relation thereon for transmitting ,loads between adjacent 'concrete' sections ot a road.

9. A road expansion joint forming mechanism comprising in combinationv a base unit consisting of a chambered base section, a base plate transversely shiftable therein and projecting therefrom, and a plurality yof staggered rows oi' anchoring members formed on the base platey and projecting upwardly therefrom tobe embedded in concrete for 4transmitting loads from one concrete road section to another through the base unit. i

10. In a road expansion joint forming mechanism a base unit comprising telescoping base' `sections having anchoring means formed thereon to be embedded in 4concrete road sections for transmitting loads from one road section to 'another through the base'unit, andload transmission` anchor shoes engaged in the base sections and alternately anchored in adjacent roadsections. f.

11. A road expansion joint forming mechanism including in combination a base unit comprising transversely shii'table interiltting base sections, and a plurality oi' staggered rows oi' -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 interiltting base sectinS l2. An expansion joint formingv mechanism including in combination a base uniti' comprising a pair of overlapping base plates transversely shiftable with respect to one another, and a plurality of staggered rows oi' anchoring means on said base plates to be embedded in concrete road sections i'or transmitting loads from one road section to another through the base unit.

13. In aroad 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 o! 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 intertting reversed :angle members having a plurality ot-anchoring blades formed thereon'and, projecting in opposite direction from the void forming core unit.

15. A road expansion joint Vformingv mechanism including in combination a load transmission device .comprising a plate, a plurality o! spaced, supporting members integrallyiormed on the lower margin thereof-and projecting from one side of the plate, and a vplurality of'anchoring blades struck'i'rom vthe upper margin of the plate and projecting outwardly from 'the oppolsitefside' 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 section sin which the base unit is embedded, andalternately 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 telesceping anchoring members disposed transversely of the core unit.

18. A road joint former including in combination a core unit, a plurality of reversed slidably interiitting members disposed transversely of the core unit, and anchoring means on said members to be embedded in concrete on opposite sides ot the core unit.

19. A road joint former including in combination a loadtransmission device comprising a plate having spaced members on one margin thereof and anchoring'members on an opposite margin. y

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 anchoringmeans on said plates to be embedded in adjacent sections of a concrete road to cause transverse shifting `0I the plates due to the expansion or contraction of the road -sections resulting from temperaturechanges.

ROBERT R. ROBERTSON.

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