US1758022A - Roadway and method of constructing the same - Google Patents

Description

May 13, 1930.

H. BEEBE ROADWAY AND METHOD OF CNSTRUCTING THE SAME Filed July 24, 1928 2 Sheets-Sheet l x qw n. 1 By ttorng' i May 13, 1930 H. BEEBE ROADWAY AND METHOD 0F CONSTRUCTING THE SAME Filed July 24, 1928 2 Sheets-Sheet 2 Inventor Harwood .Beebe Patented May 13, 1930 PATENTv OFFICE HAnwooD BEEBE, or SPARTANBURG', soU'rH CAROLINA ROADWAY AND METHOD or coNsTRUcTING THE SAME Application filed .Tuly 24,

The present invention relates to' improvements in road constructions and has for its principal object to provide a roadway consisting of spaced wooden Yheader curbings between which is built a foundation of topy soil and sand clay or other similar material as a base for bituminous types of wearing surfaces.

A further object is to provide a roadway that includes supplemental header curbs that are secured on the upper edges of the main header curbings to provide an abutment for the asphalt surface. j

Still a further obj ect is to provide a roadway construction wherein a foundation may be used initially as a road surface to secure a well bonded top soil road bed, which will a1- ways conform to a true line and grade, after which the material forming the foundation will be suitable as a base for an asphalt top surface, and the employment of the supplemental header curbs will allow the formation of a square edge at the sides of the asphalt to Itill a further obj ect is to provide a roadway and an improved method of constructing the same which is simple and inexpensive and the road will be strong and durable.

Other objects of the invention will become apparent as the nature of the invention proceeds and when taken in connection with the accompanying drawings.

In the accompanying drawings, forming apart of this application and wherein like reference characters designate like; parts throughout the several views Figure l is a sectional 'view showing. the first step in buiding my improved roadway, wherein spaced wooden header curbs are placed in an edgewise manner on the fnisghe sub-grade.

Figure 2 is a similar section showing the foundation in place between the header curb and the for-mationfofearth shouldersfat the vouter-sides ofthe header curbs.

192s.' serial No. 294,978.

Figure 3 is a similar section show-ing the. attachment of a supplemental curb to t-he upper edges of the main header curb, prior to the application of the bituminous wearing surface.

Figure 4 is a cross sectional view throughk a completed roadway constructed in accordance with the present invention and showing the manner in which the bituminous wearing surface covers the foundation and abuts the inner opposed side edges of the supplemental header curb.

Figure 5 is an enlarged fragmentary side elevation showing the connecting means between the adjacent sections of the main header curb and the manner in which the supplemental header curbs are attached to the upper edges of the main header curbs.

Figure 6 is an edge elevation looking into one end of one of the sectionsof. the main header curbs and the supplemental head-er curb which is secured thereon, and

Figure 7 is agroup perspective of the adjacentends of one pair of sections of the main header curbs.

In the dra-wings, wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numerals l and 2. designate the spaced wooden header curbs that are of rectangular formation and each of these header curbs includes a`V plurality of sections denoted by the reference characters 3 and 4 respectively, with reference more particularly to Figures 5 and 7. The adjacent ends of the sections of each main header curb are formed with cooperating dowel pins 5, and sockets 6, whereby said sections may be connected together in abutting relation and so that said sections will be disposed in` alignment with each other.

The sectional` main header curbs are disposed in an edgewise manner and the lower edges of the header curb extend slightly below the sub-grade A, as shown in' Figur-e 1. `With the' main header. curbs positionedin` the Cil manner as shown in Figure 1, the road foundation 7 which consists of a mixture of top soil, sand clay, clay gravel, or other similar material, fills up the space between the header curbs and this material is brought to a true contour even with the header curbs, parallel to the proposed finished grade. rlhc earth shoulders 8 are then built up at the outer sides of the respective header curbs and these shoulders are thoroughlyv compacted.

The road as thus far constructed can be thrown open to traiiic and machined and worked as necessary to secure a well-bonded top soil road bed. lllhen using a road machine, the timber header curbs shall be used as a gauge for maintaining the proper surface contour of the road. The road shall be kept as near as possible to the proper contour at all times.

Then the road becomes thoroughly bonded under traiiic and weather conditions, so that it is suitable to serve as a base for a bituminous wearing surface, supplemental wooden reader curbing strips 9 and 10 are secured on the upper edges of the sectional main header curbings 1 and 2 respectively, by driving nails, such as are shown at 11, through the supplemental header curbings into the respective main header curbs as shown in Figures 5 and 6 of the drawings.

These supplemental header curbs are also constructed in section and are of the same width as the width of the sections comprising' the main header curbs. These supplemental header curbing strips are rectangular in cross section and the height of the supplemental header curbing strips depends upon the thickness of the proposed asphalt top wearing surface.

lf the upper edges of the main header curbs have become worn under traffic or by the use of road machines to the extent hat a proper bearing surface cannot be secure-d for the supplemental header curbing strips, then the inain header curbs can be trued down to provide a smooth surface for properly receiving the supplemental header curbing strips.

lfhen the parts are arranged as shown in Figure 3 of the drawings, and the surface of the road bed has been thoroughly cleaned, the finishing asphalt wearing surface 12 shall be placed upon the road, the same to conformto the finished contour of the pavement. The shoulders of the road outside of the header curbs shall be built up to conform with the roads asphalt surface, as indicated at 13, in Figure 4.

The use of the rectangular shaped supplementalV header curbs will provide a means whereby a square edge will be formed at each side of the asphalt wearing surface 12, instead of forming the wearing surface with a tapered edge, which is always subject to breakage, dueto itsthinness.

A road vconstructed in the manner as described above will not only be strong and durable, but will also be inexpensive.

The use of the timber header curb enables the base of foundation of the road to be held in a rigid position thereby preventing any sloughing away of the material. The header curbs will also protect the soil base from any circulation of water under the road surface, which would sof-ten the base and allow failure of the pavement. By building up the header curbs in the manner as shown, the top soil or foundation of the road may be built up and a true surface maintained under traffic until time for scrap ing the bituminous wearing surface, and in this manner, a bon d of the base can be secured in such a manner that it is impossible to obtain by mechanical means.

lVhile I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. A method of constructing a roadway consisting in setting spaced header curbs on a finished sub-grade, covering the sub-grade between the curbs with a basel'forming composition, forming earth shoulders at the outer sides of the curbs, subsequently building up the header curbs and finally covering the base with a bituminous wearing surface, the edges of the wearing surface abutting the built up portions of the header curbs.

2. A roadway comprising spaced header curbs extending upwardly from the finished sub-grade, and a foundation of suitable material compressed between the curbs, the top surface of the foundation being arranged in the contour of the upper edges of the header curbs, shoulders built up at the outer sides of the curbs, supplemental header curbingr strips secured on the upper edges of the aforementioned header curbs, and a wear surface material covering the foundations abutting the supplemental header curbing strips. the supplemental header curbing strips being rectangular in cross section to provide square side edges for the said wearing surface.

3. A roadway comprising spaced header curbs extending upwardly from a finished sub-grade, a foundation of suitable material compressed between the curbs, the top surface of the foundation being arranged in the contour of the upper edges of the header curb, shoulders built up at the outer sides of the curbs, supplemental header curbing strips secured on the upperY edges of the aforementioned header' curbs, a Wear surface material covering the foundation abutting the supplemental header curbing strip, said shoulders being built to meet the supplemental face of the curbing strip.

4. A roadway comprising spaced sectional llO header' curbs extending upwardly from a finished sub grade, a foundation of suitable material compressed between said curbs, the top surface of the foundation being arranged in the Contour of the upper edges of the header curbs, supplemental sectional header curbing strips secured on the upper edges of the aforementioned header curbs, and a wear surface material covering the foundation abutting the supplemental header curb strip.

In testimony whereof I affix my signature.

HAR'WOOD BEEBE.

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