US1952721A - Reenforced pavement and method of laying the same - Google Patents

Description

March 27, 1934. MQMacCHESNEY ET AL 1,952,721

REENFORCED PAVEMENT AND METHOD OF LAYING THE SAME Filed Sept. 11, 1930 3 Sheets-Sheet 1 16g 16- J69 Wen/5. M5070 March 27, 1934. c MaOCHEsNEY ET AL 1,952,721

REENFORCED PAVEMENT AND METHOD OF LAYING THE SAME s Sheets-Sheet 2 Filed Sept. 11 1930 r 5 1 bani/0715 Chester/Z flfizchesm 77/ B. WLLSOTZ/ March 27, 1934 Q MaCCHESNEY AL 1,952,721

REENFORCED PAVEMENT AND METHOD OF LAYING THE SAME 5 Sheets-Shet 3 Filed Sept. 11. 1930 Patented Mar. 27, 1934 UNITED STATES REENFORCED PAVEMENT AND METHOD OF LAYING THE SAME Chester M. MacChesney, Chicago, and Allen B. Wilson, Evanston, Ill., assignors to Acme Steel Company, Chicago, 111.,

a corporation of Illinois Application'September 11, 1930, Serial No. 481,150

10 Claims.

This invention relates to improvements in reenforced pavements and method of laying the same and the present invention is an improvement upon the inventions described and claimed in the copending applications of Allen B. Wilson, Serial No. 382,889, filed August 2, 1929 and Chester M. MacChesney, Serial No. 382,924, filed August 2, 1929. In said copending applications, there are disclosed methods of reenforcing pavement according to which the base of the pavement is provided with a metallic reenforcing mat made up of a number of units which are pivotally connected together so that a section of the reenforeing mat of the desired length may be laid' down upon the base with the metallic strips orribbons which form the units thereof presented edgewise to the base and to thesurface of the finished pavement which results from filling inthe spaces of the reenforcing mat with asphalt or other plastic paving material. Reenforced pavements of this type are particularly adapted for use as runways in shops, factories, docks, railroad platformsand the like where the trafiic is very heavy and it is frequently desirable to reenforce the pavement over a relatively long and narrow strip only. In many instances this long strip of reenforced pavement forms a runway in a shop, factory or the like and, having been superimposed upon a previously laid floor, occupies an elevated position with respect to the surrounding floor or roadway surfaces. Under these circumstances, the trafiic frequently moves crosswise over the reenforced strip of pavement and the wheels of trucks and other vehicles have a tendency to break down the edges'of the metallic reenforcement.

It is the principal object of the present invention to provide a reenforced pavement of the general type disclosed in the above-mentioned applications, in which improved means are provided along the edges of the reenforcement for permitting traffic to move crosswise over the reenforced strip without injury to the metallic reenforcement or to the concrete asphalt or other material which forms the body of the pavement. Still another object of the invention isto provide a pavement having a metallic surface reenforcement united along its edges with metallic buffer plates which are adapted to direct the traffic upwardly over the reenforced pavement when it moves crosswise thereof. A further object'of the invention is to provide 'an improved method of "reenforcing the-pavement according to which a continuous strip of flexible metallic reenforcing material'is unrolledupon the pave- (Ol. 94-8) i ment base, then united along its edges with metallic buffer plates and then filled with a body of plastic paving material-to cause the edges of the metallic reenforcing material to be presented m edgewise substantially flush with thesurfaceof the resulting pavement. Another object of the invention is to provide a reenforced pavement comprising a metallic reenforcing mass made up of a number of units which are pivotally connected together and which are provided at their edges with relatively movable pins adapted to form a connection with inclined buffer plates located along the edges of the metallic strip. Other objects relate to various features of construction H and arrangement which will appear more fully hereinafter. V

The nature of the invention will be understood from the following specification taken with the accompanying drawings in which one exam- 7 ple of the improved pavement and one example 7 of the improved method of laying the same are set forth.

In the drawings, Figure 1 shows a side eleva tion of a roll of the metallic reenforcing material before it is applied to the pavement base; I

Fig. 2 shows a top plan view of a portion of the metallic reenforcing mat illustrated in Fig.

1 after it has been separated from the end of the roll; l

Fig. 3 is a perspective view of one unit of the flexible metallic reenforcing mat with one of the pins by which this unit is connected to the next adjacent unit;

Fig. i is a perspective view of one edge portion of the metallic reenforcing mat having ap- '9 plied thereto the inclined buffer plates by which trafiic is directed upwardly over the mat;

Fig. 5 is a perspective view of one length or unit of the metallic buffer plates;

Fig. 6 is a top plan view of one edge portion of the finished pavement after the spaces of the metallic reenforcing mat have been filled with paving material;

Fig. 7 shows a top plan View of the entire I width of a portion of the metallic reenforcing mat showing the reenforcement of the opposite edges thereof by the metallic buifer plates of the present invention;

Fig. 8 shows a transverse vertical section taken on the line 8-8 of Fig. '7, and

Fig. 9 shows an enlarged detail vertical section taken on the line 9-9 of Fig. 6.

As shown particularly in Figs. 1, 2 and 3, the flexible reenforcing mat 15 is made up of a plurality of individual, transversely extending units llO' 16. Each unit 16 is formed of a sheet metal strip or ribbon which is bent bacl: and forth upon itself in zigzag fashion to form a series of reversely arranged U-shaped convolutions 16 each comprising side Walls 16 and a connecting end wall 16. The side walls 16 of one U-shaped convolution also form two side walls of two adjacent reversely directed U-shaped convolutions. At the end of the unit 16, the metal is directed outwardly to form tongues 16 which are, in effect, half portions of end walls 16 These units 16 are placed together as shown in Fig. 2 so that the U-shaped ccnvolutions of one unit intermesh with those of the next adjacent unit and the side walls 16 of the U-shaped convolutions are provided with apertures 17 which are engaged by rods 18, formed of steel wire or the like, thereby establishing a pivotal connection between adjacent units 16 throughout the mat so that it has a flexible construction and is capable of being rolled upon itself to form a cylindrical roll 20 as shown in Fig. 1. The ends of the connecting rods 18 are preferably transversely bent as shown at 18 but the remaining portions thereof are spaced so that any desired rod 18 may be withdrawn from the mat 16 by cutting off or straightening one transversely bent end when desired to separate a mat section 15 of the desired length as shown in 2 where one of the rods 18 has been withdrawn to separate a section 15 from the end of the supply roll. The lower edge of. the metal strip which forms each unit 16 rests edgewise on the underlying supporting surface and the walls 16 and 16 7 of the convolutions are directed vertically upon the supporting surface. The holes 17 are similarly located in all of the units 16 and are preferably disposed adjacent the lower edges thereof so that when the pivot rods 18 are inserted therein, the lower edges of the connecting unit 16 are capable of occupying one plane or of conforming to the curvature of the underlying surface. The reenforcing material thus formed may be made up in very long lengths which can be shipped and moved about in the form of roll 20 and then unrolled on the base of the pavement to supply the lengths or sections desired.

According to the present invention, the metallic reenforcing mat described above is adapted to be used on the base of the pavement with metallic buffer plates 25 which extend along the edge of the pavement. Each buffer plate 25 comprises an inclined body portion 25 which is integrally united at its inner edge with a downturned flange 25 The body portion 25 may be formed with a fiat surface, as shown in Fig. 4, and the down-turned flange 25 is adapted to bear against the ends of the projections 16 which are formed on the unit 16 when the mat and the buffer plate are assembled together upon the pavement base. The buffer plate is provided along its outer lower edge with a plurality of grooves 25 which extend inwardly from the outer edge of the plate and which are formed by depressing portions of the plate during the process of rolling it from hot metal. Each groove 25 has a bottom wall 25 whichis adapted to rest upon the base of the pavement and which bottom wall is united integrally with the converging side walls 25 The side walls 25 and the bottom wall 25 of each groove are united at their inner ends with the vertically extending end wall 25 which is parallel to the inner wall or flange 25 The wall 25 of each buffer plate is provided with an aperture 26 located in alignment with a similar aperture 27 formed in the end wall 25 of one of the grooves 25. The aligning holes 26 and 2'7 of each pair are adapted to receive a pin 28 which is transversely turned at its outer end as shown at 28 and sharpened at its inner end as shown at 28*. The pin 28 is adapted to engage a number of aligning apertures 29 which are formed in the side walls 16 of one of the units 16 adjacent the lower edge thereof so that after the metallic reenforcing mat section 15 has been put in place on the pavement base, the buii'er plates 25 may be moved into position along the edge of the mat and then the pin 28 may be pushed inwardly through the holes 27, 26 and 29 to unite-the buffer plates with the mat. In order that the buffer plates may be readily handled and adapted for use in any desired length, they are made up in sections 25 The body portion 25 of each section is divided at one end with 'an undercut notch 25 and at the other end it aligning apertures 29 of the adjacent mat. When the pins 28 are in position, they are prevented from turning by the engagement of the trans= versely directed ends 28 with the side walls 25 of the groove.

In the practice of the invention, the required length 15 of the flexible metallic matting is separated from the roll 20 by removing one of the rods 18 and then this section of matting is laid down upon the pavement base 30, as shown in Figs. '7 and 8 with the lower edges of the unit 16 of the mat resting edgewise upon the upper surface of the base 30 which may be formed of concrete or of wood or other suitable material. Having laid the mat sections 13 in place on the base 30, the buffer plates 25 are placed along o the edges thereof and formed by uniting a suitable number of lengths or sections 25 of the buffer plates in the manner previously described. These buiier plates are located so that the pins 28 may then be inserted through the holes 2'? and 26 into the aligning apertures 29 which are formed in the side walls of the mat unit. When the pins 28 have been inserted, the spaces between the walls of the mat units are filled with paving material 31 which may be asphalt, mastic, concrete or other material. When this paving material 31 has hardened, the pins 28 are held firmly in place and the engagement of the transversely extending portions 28 of these pins with the end walls 25 of the grooves, then serves to maintain the buffer plates firmly in position with walls 25 engaging the projections 16 of the mat units. In this way an inclined buffer plate is provided along each edge of the reenforced paving strip. It will be understood that before placing the buffer plates 25 in place, several links of metallic reenforcing mat may be united with each other along their edges by the practice of the invention described and claimed in said copending application of Chester M. MacChesney.

Although one form of the improved reenforcing material and one example of the improved method of laying the pavement have been set forth herein by way of illustration, it will be understood that the method may be practiced in various ways and that the pavement may take various forms within the scope of the appended claims.

We claim:

1. A reenforced pavement comprising a paving base, a metallic mat resting on said base, a buffer plate having a supporting surface extending continuously along the edge of said mat on said base, said buffer plate and said mat having aligning apertures therein, and a connecting member passing through said aligning apertures transversely to said edge of said mat.

2. A reenforced pavement comprising a paving base, a metallic mat resting on said base, a buffer plate extending along the edge of said mat on said base and having a supporting surface inclined upwardly from said base to the upper edge of said mat, said buffer plate and said mat having aligning apertures therein, a connecting member passing through said aligning apertures, and reenforcing material occupying the spaces of said mat and holding said rod in place.

3. A reenforced pavement comprising a paving base, a metallic reenforcing mat resting on said base, a buffer plate resting on said base along the edge of said mat and having a continuous supporting surface inclined upwardly from said base to the upper edge of said mat, and a series of detachably connecting members extending through said buffer plate into said mat transversely to said edge of said mat.

4-. A reenforced pavement carrying a paving base, a metallic reenforcing mat resting on said base and having a series of transversely extending apertures along the edge thereof, a buffer plate inclined upwardly toward the edge of said mat and having a down turned flange resting edgewise on said base adjacent said mat, and means for attaching said buffer plate to said mat.

5. A reenforced pavement carrying a paving base, a metallic reenforcing mat resting on said base and having a series of transversely extending apertures along the edge thereof, a buffer plate inclined upwardly toward the edge of said mat and having a down turned flange resting edgewise on said base adjacent said mat, said buffer plate having an inwardly extending groove with an upright apertured wall at the inner end of said groove, said flange of said buffer plate having an aperture in alignment with the aperture in said wall, and a rod extending through said apertures in said buffer plate into said apertures in said mat.

6. A reenforced pavement carrying a paving base, a metallic reenforcing mat resting on said base and having a series of transversely extending apertures along the edge thereof, a buffer plate inclined upwardly toward the edge of said mat and having a down turned flange resting edgewise on said base adjacent said mat, said buffer plate having an inwardly extending groove with an upright apertured wall at the inner end of said groove, said flange of said buffer plate having an aperture in alignment with the aperture in said wall, and a rod extending through said apertures in said buffer plate into said apertures in said mat, said rod having its outer ends bent transversely.

7. A reenforced pavement carrying a paving base, a metallic reenforcing mat resting on said base and having a series of transversely extending apertures along the edge thereof, a buffer plate inclined upwardly toward the edge of said mat and having a down turned flange resting edgewise on said base adjacent said mat, said buffer plate having an inwardly extending groove with an upright apertured wall at the inner end of said groove, said flange of said buffer plate having an aperture in alignment with the aperture in said wall, a rod extending through said apertures in said buffer plate into said apertures in said mat, said rod having its outer ends bent transversely, and paving material filling the spaces of said mat.

8. A reenforced pavement comprising a paved base, a plurality of metallic reenforcing mat sections resting edgewise on said base and intermeshing with each other, said sections having aligning apertures, metallic members engaging said aligning apertures for pivotally connecting said sections, said sections having other aligning apertures extending through the parts thereof between said members, a buffer plate resting on said base and having a support surface extending upwardly from said base to the upper edge of said mat, said buffer plate having apertures therethrough in alignment with said last named apertures in said mat sections, and connecting members engaging said apertures in said buffer plate and said last named apertures in said sections.

9. A reenforced pavement comprising a paving base, a reticulated metallic mat resting on said base, a buffer plate extending along the edge of said mat on said base and having a supporting surface inclined upwardly from said base to the upper edge of said mat, means for securing said buffer plate to said mat, and paving material occupying the spaces of said mat substantially to the level of the upper surface thereof.

10. A reenforced pavement comprising a paving base, a reticulated flexible metallic mat resting on said base, a buffer plate extending along the edge of said mat on said base and having a supporting surface inclined downwardly from the upper edge of said mat to said base, connecting means engaging said buffer plate and extending into said mat, and paving material occupying the spaces of said mat and serving to anchor said connecting means in place.

CHESTER M. MACCHESNEY. ALLEN B. WILSON.

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