US2178119A - Road joint assembly and support - Google Patents

Description

Oct. 31, 1939. J. H JACOBSON ROADJOINT ASSEMBLY AND SUPPORT Filed July 22, 1935 2 Sheets-Sheet l H-IS ATTORNEY.

Oct. 31, 1939. J. H. JACOBSON 2.178.119

ROAD JOINT ASSEMBLY AND SUPPORT Filed July 22, 1935 2 Sheets-Sheet 2 Patented Oct. 31, 1939 UNITED STATES PATENT. OFFICE ROAD JOINT ASSEMBLY AND SUPPORT Application July 22, 1935, Serial No. 32,523

"lClaims.

This invention relates to highway construction and particularly to parting strips or joints such as are now being employed in concrete pavements, roadways, or the like, to provide means for dividing the pavement material into definite slabs and to accommodate the movement of the slabs during periods of volume change.

The invention relates specifically to means for supporting the so-called expansionjoints,

and cooperatively supporting the dowel bars or reinforcing steel assemblies such as are in common use today, and which dowels span the joint, engaging the adjoining sections of concrete on either side of the joint to effect load transfer 5 from one slab to the next adjoining.

My present invention is more-applicable to joint materials such as saturated felt, cork, rubber, and impregnated fiber boards of various types such as now employed, and is most ap- 0 plicable to any type of such joint where the joint material itself is pliable, soft or limber. In the assembly of such a joint in the field, it is diflicult to place the joint properly and maintain the joint and the assembly of dowels in correct alignment both horizontally and in line with the major axis of the pavement.

It is therefore a paramount object of my invention to provide a co-operating support for the joint itself in combination with the reinforcing medium. which support will maintain both the joint material and the dowels in a definite plane and against disarrangement or dis-figurement during the pouring of the fluid concrete and during the period between the time of the pouring and setting up of the concrete slab.

Further objects of my invention are:

To provide means to prevent the rotary movement of the winged anchors about the axis of the dowel bar, thereby maintaining the plane of the wings in the proper pre-determined position in relation to the position of the slab; and

To provide a definite means for reinforcing the edges of the hole through the joint material thereby preventing elongation, and thus hold the 5 wing anchors or dowel rigid and parallel with the surface of the finished road while the plastic concrete is being placed adjacent thereto; and To provide means to permit the drilling or punching vofa hole through the joint material 50 with a diameter considerably larger than that of the dowel and thus facilitate the assembling (shop or field) of the wing anchors or common dowels to the joint so as to provide means for attaching the wing anchors or common dowel 55 to the joint material in the shop with sufficient rigidity so that the handling of the joint after assembling will not loosen the dowel in the more or less soft and pliable material comprising the joint; and

To provide cooperating means for holding the 5 reinforcing steel assembly and the, joint material in position by the use of a stake pin; and

To provide means for preventing the stake pin being driven into or through any part of the joint material by providing a face plate between 19 the stake pin and the joint material; and

To provide an article which can be assembled to thejoint in the shop pre-determining. the stake pin spacing for the field installation; and which can be relocated in the field when neces- 15 sary to meet unusual conditions; and

To provide means for holding the reinforcing steel assembly and the joint material down to the road bed and prevent floating while in its initial position and also while placing the fluid so concrete; and

To provide means for preventing the joint from being displaced longitudinally by the hydrostatic pressure of the fluid concrete against the joint; and

To provide means for stiffening the limber joint material particularly at the point immediately adjacent the reinforcing assembly.

This invention has these and other objects, all of which will be explained in detail and more so readily understood when read in conjunction with the accompanying drawings (2 sheets), which illustrate one specific embodiment of the invention, it being understood that changes may be resorted to without departing from the spirit of a the invention as expressed in the appended claims.

In the drawings:

Fig. l is a perspective view of the joint support and dowel bar assembly applied to a mastic joint; 0

Fig. .2 is a like view of a modified form of support showing the omission of the stake pin.

Fig. 3 is also a view similar to Figs. 1 and 2 modified in that the dowel bar or reinforcing steel assembly has been omitted.

Fig. 4-is a perspective of the support itself with the joint material, load distribution member and the stake pin having been removed.

Fig. 5 is a view similar toFig. 2 except as in Fig. 4 the joint material and dowel have been removed; and

Fig. 6 is a view of the chair or support as illustrated in Fig. 3, and as in the case of Figs. 4 and 5 the joint material and stake pin have been omitted.

Similar reference characters refer to similar parts throughout the respective views.

The embodiment of the invention expressed in the drawings contemplates the use of a mastic, cork, or rubber joint in the form of a strip designated by the reference character 1 which is usually about three-quarters of an inch in width, eight inches in height, and long enough to span the concrete pavement transversely to the .line of traflic. The material is pliable, soft and limber, and in order to support this joint upon the subgrade or base material I provide throughout its length a series of plates formed in a channel section comprising a web member 8, with substantially parallel flanges or side walls 9, which engage the sides of the joint material I, and extend upwardly to about mid-depth of the joint. The top of the flanges 9, are flared outwardly and provided with apertured guide ribs l0, adapted to receive the usual form of stake pin II, which is passed through the apertures in the guide ribs Ill, and driven down into the subgrade or base ma terial as illustrated in Figs. 1 and 3. The flanges 9 of the channel section are also provided with aligned apertures 12- which are adapted to receive the common dowel, or preferably, as illustrated in the drawings, a dowel bar, bearing, and anchor assembly similar to that shown and described in the copending application of one Clifford H. Westcott filed May 20, 1935, Serial No. 22,308. This assembly comprises a short dowel II which passes through and extends beyond each face of the joint, the ends of the dowel having bearing in wing anchor sleeves I4 and I5 which sleeves have lateral lugs l6 protruding from opposite sides as shown. The flanges 9 of the channel section support the dowel bearing, but in order to prevent the rotary movement of the dowel and the consequent disarrangement or misplacement of the wing anchors I4 and I5, I provide a pair of anchor clips I! and I8, which are preferably formed from the material of the channel section and are adapted to engage the lugs I6 and thus lock the dowel bearing against any possible rotation about its axis which would disarrange the definite positioning of the wing anchors.

Whereas I have shown a particular type of reinforcing steel or dowel bar assembly, it must be appreciated that the same type of support is most applicable to the common dowel in use today, in that the flanges! of the channel section serve as reinforcing members which engage and support the dowel, as when the joint material itself is made of soft, pliable, and limber material, there is not enough stiffness or rigidity to the joint to sufficiently support the dowel and maintain the dowel in its proper alignment.

Fig. 6 shows the same channel section with the dowel bar support removed. Such a section serves as a means for'aligning the joint intermediate the dowel bar spacing, and further in Fig. 6 the side walls or flanges of the channel section are shown with a tongue l9 pierced from the walls inwardly so that the section of the stool or support is definitely anchored to the body of the joint, thus preventing the joint from floating dur ing the pouring of the fluid concrete.

Having thus'illustrated and described a specific embodiment of my invention, what I claim as new and desire to secureby' Letters Patent is:

1. A joint supporting unit comprising an apertured plate formed into a channel section and consisting of a web, a pair of substantially parallel flanges extending therefrom, a guide rib formed on the end of each flange and projecting in opposite directions from one another, a reinforcing assembly passing through and supported by said channel section, and anchor clips likewise projecting from each flange of the channel section and engaging portions of said reinforcing assembly and being characterized by their ability to maintain said reinforcing members against rotation and in their pre-determined position, and a stake pin passing through said guide rib to position the unit so assembled prior to and during the pouring of the fluid concrete.

2. In combination, a pair of adjoining concrete sections forming part of a concrete road or the like, an expansion joint interposed between said sections, a load transfer member spanning the joint, and means cooperating with the joint for supporting both the joint and the load transfer member prior to and during the pouring of the fluid concrete, said cooperating means comprising an apertured plate formed into a channel section and consisting of a web, a pair of substantially parallel flanges extending therefrom and engaging the expansion joint, a guide rib formed on the end of each flange and projecting in opposite directions from one another, and anchor clips likewise projecting from each flange of the channel section and engaging portions of said load transfer member and being characterized by their ability to maintain said portions against rotation and in its predetermined position, and a stake pin passing through said guide rib to position the unit so assembled prior to and during the pouring of the fluid concrete.

3. A joint supporting unit comprising a channel shaped member comprising a web and a pair or substantially parallel flanges extending therefrom, a guide rib formed on the end of each flange and projecting in opposite directions from one another, a reinforcing assembly passing through and supported by said channel section, and a stake pin passing through said guide rib to position the unit so assembled prior to and during the pouring of the fluid concrete.

4. In combination, a pair of adjoining concrete sections forming part of'a concrete road or the like, an expansion joint interposed between said sections, a reinforcing member spanning the joint, and means cooperating with the joint for supporting both the joint and the reinforcing member prior to and during the pouring of the fluid concrete, said cooperating means comprising a channel member consisting of a web and a pair of substantially parallel flanges extending therefrom and engaging the expansion joint, a guide rib formed on the end of each flange and projecting in opposite directions from one another, and a stake pin passing through said guide rib to position the unit so assembled prior to and during the pouring of the fluid concrete.

5. A joint supporting unit comprising a chan nel member consisting of a web and a pair of substantially parallel flanges extending therefrom, a guide rib formed onthe end of each flange and projecting in opposite directions from one another, a plastic joint positioned within the confines of the flanges and receiving its support therefrom, and a stake pin passing through said guide rib to position the unit so assembled prior to and during the pouring of the fluid concrete.

6. A joint supporting unit comprising an apertured plate formed into a channel, section and consisting of a web, a pair of substantially parallel flanges extending therefrom, a load transfer member passing through and supported by said channel section, and anchor clips projecting supporting both the joint and said member priorjoint, and means cooperating with the joint !or o to and during the pouring or the fluid concrete, said cooperating means comprising an apertured plate formed into a channel section having a pair of substantially parallel flanges engaging the expansion joint, and means associated with each flange of the channel section engaging portions of said member, said last mentioned means being characterized by its ability to maintain said member in a predetermined position.

JAMES H. JACOBSON.

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