US2039420A - Method of constructing, repairing, and widening concrete roads - Google Patents

Description

May 5, 1936. J w s T I 2,039,420

METHOD OF CONSTRUCTING, REPAIRING, AND WIDENING CONCRETE ROADS Filed July 29, 1935 2 Sheets-Sheet l 1935- J. w. ISETT 2,039,420

METHOD OF CONSTRUCTING, REPAIRING, AND WIDENING CONCRETE RQADS Filed July 29, 1955' 2 Sheets-Sheet 2 (70km wink/[sew Patented May 5, 1936 METHOD OF CONSTRUCTING, REPAIRING,

' AND WIDENING CONCRETE ROADS John Warren Isett, Hinsdale, 111. Application July 29, 1935, Serial No. 33,682

6 Claims.

This invention relates to new and improved methods of constructing, repairing and widening concrete roads.

The main object of the invention is to provide a method whereby concrete roads may be constructed in sections and the sections may be retained in their intended positions relatively to each other and undesirable movement of the secv tions may be prevented.

Heretofore, for the purpose of tying the two sections of the road together and transmitting a portion of the wheel load from one section to the other, it has been customary to embed in the concrete being poured to form a section of road, a plurality of uniformly spaced rods usually made of metal and approximately 4 feet in length, about half of each rod being embedded, and to bend each rod so the free half extends at a right angle to the embedded portion and lies closely adjacent to the side surface of the concrete between the concrete and the form. When the form is removed, some of the free ends of the rods are pulled away from the section in which they are partly embedded and thus protrude while the adjacent road bed is being graded and prepared for pouring concrete thereon. ing is completed and before the next concrete section is poured, the bent rods are straightened so as to extend in alignment with the embedded portion, into the concrete to be poured to form the next adjacent section. This method'has serious disadvantages due to the fact that the protruding portions of the rods frequently are broken off or the steel is fractured by contact with the grading machinery and the bending and subsequent straightening of the rods weakens them and causes breakage thereby defeating their intended P p One of the objects of my invention is to provide means for tying together adjacent, separately formed sections of concrete roads without the use of tying means or slip rods which protrude from one section while an adjacent section is being graded or prepared.

Another object is to obviate the necessity for increasing the thickness of the concrete at and near the inner edges of adjacent sections which is unnecessary and expensive. By my method a portion of the wheel load is transmitted to the adjacent slab thereby making the thickened inner edges of the two sections unnecessary.

Another object is to obviate the necessity for increasing the thickness of the concrete at and near the inner edges of the adjacent sections in multiple lane roads poured in sections, in which After the gradthe proximate edges of adjacent sections are provided with the conventional groove and hinge construction. By my method the complemental concave and convex edges of the adjacent sections are securely tied together and will not sepa- 5 rate through contraction or expansion of the concrete or from any other cause.

In the drawings- Fig. 1 is a plan view of adjacent sections of concrete road constructed according to the meth- 0 0d of my invention.

Fig. 2 is a vertical sectional view through part of a section of concrete road and the removable wood form used in the construction of same. Fig. 3 is a vertical sectional View of the section 15 shown in Fig. 2 with the form removed and a second section of concrete adjacent to the first section.

Fig. 4 is an enlarged section taken on the line 4-4 of Fig. 2.

Fig. 5 is a vertical sectional view similar to Fig. 2 showing part of a section of concrete road provided with a vertical tongue and groove metal plate for forming a groove in the joint to produce a hinge-like effect between the two sections of 25 concrete and also showing the form used in constructing the section.

Fig. 6 is a vertical sectional view showing the section illustrated in Fig. 5 with the form re-' moved and with another concrete section adja- 30 cent the first mentioned section.

Fig. 7 is a vertical sectional view similar to Figs.

2 and 5, showing a concrete section provided with another form of vertical plate for producing a plane of weakness in the finished roadway, and 35 showing the form used in constructing the section.

Fig. 8 is a vertical sectional view showing the concrete section of Fig. '7 with the form removed and another concrete section adjacent to said 40 first section.

Figs. 9, 10 and 11 showmodified forms of part of the means for tying adjacent sections together in accordance with the method of my invention.

Fig. 12 shows a round, smooth rod threaded on 45 one end.

Referring to that embodiment of my invention illustrated in Figs. 1 to 4, inclusive, adjacent concrete sections are indicated at Ill and H. These sections may be sections which are disposed either 50 transversely or longitudinally of the road. A plurality of metal inserts or anchoring devices indicated as a whole at l2 each comprise an end disc l3, a body member I! which is cross shaped in cross section to form ribs l5 merging with the 55 disc I3 and a tubular body portion I6 which is internally screw threaded at H. The mouth of the tubular body I6 is provided with flanges I8 cut away at I9 to provide recesses for nails 20. According to the method of my invention conventional forms 2I are used to confine the concrete section III. The inserts I2 are nailed to the inner surface of that part of the form which defines the edge which will be adjacent to another concrete section. After the inserts have been fixed in their intended positions, from 2 to 5 feet apart, the concrete is poured to form the section I II. In due course the form 2I is removed and the flanged mouths of the internal screw threaded tubular bodies I6 are exposed. After the grading for the adjacent section II has been completed, hook bolts'22 or other suitable devices such as stud bolts, threaded rods, smooth or deformed, anchor bolts or thelike, having screw threaded ends 23, are screwed into the tubular bodies I6 as indicated in Figs. 1 and 3. The concrete to form the section II is then poured adjacent the section III to cover the devices 22. Thus separately formed sections of concrete are tied together efficiently and undesired relative movement of the sections is prevented. When sections located transversely of the roadway are constructed according to my invention, I prefer to use hook shaped tying devices 22 or other suitably formed devices which tie the concrete sections together, whereas between sections which extend longitudinally of the roadway I prefer to use smooth bolts or shear bars painted and greased so as to permit relative movement between the sections longitudinally of the roadway.

Assuming that the concrete sections I and II shown in Fig. 1 are located transversely of the roadway and that the dividing line between the two sections extends longitudinally of the roadway, I preferably use tying devices such as those illustrated at 22 in Figs. 1 to 4 for extending across said longitudinal line and use plain bolts or shear bars placed adjacent and parallel to said longitudinal joint for extending across the transverse joints between sections located longitudinally of the road. This arrangement will permit free movement of the plain bolts or shear bars in one section of the concrete and present the full section of the bolts or bars for load transmission.

The screw threaded ends of the smooth bolts or shear bars are inserted in the anchoring devices or inserts I2 after the first section has been formed, and the smooth ends are left free to slip in the adjacent section of concrete, thereby allowing for contraction and expansion of the two sections, longitudinally of the road, and permitting expansion joints to be used in transverse joints or cracks.

Referring to that embodiment of the invention shown in Figs. and 6, the adjacent concrete sections III and II indicate sections disposed transversely of the road and separated by a vertically disposed plate 26 for producing the conventional grooved longitudinal center joint. The plate 26 is known as a groove form plate and when used in constructing roads according to my invention is provided with a plurality of apertures 21 spaced apart two to five feet, longitudinally of the plate. In this embodiment of the invention the form 24 is similar to the form 2I heretofore mentioned except that it may be made out of steel or wood and is provided with apertures 25 which register with the apertures 21 of the plate 26. After the form 24 has been set up to define the section III, the plate 26 is positioned adjacent the inner surface of that part of the form which defines the side margin of the concrete adjacent the section II to be subsequently poured. Inserts I2 and the plate 26 such as heretofore described, are held in place by means 5 of headed bolts 28 which extend through the apertures in the form 24 and plate 26 into the screw threaded bodies I6 of the inserts. The inserts are spaced two to five feet apart, longitudinally of the form 24, and between the upper and lower edges of the form. After the concrete III has been poured the bolts 28 and form 24 are removed. If desired the grooved plate 26 may also be removed to be used again for forming other sections. The removal of the form 24 or of the form and plate will expose the internally screw threaded portion II of the anchoring devices or inserts I2 at that vertical face of the section III which will abut the adjacent section I I. After the grading for the section I I has been completed, hook bolts 22, straight bolts, threaded rods or other suitable devices are screwed into the inserts I2 and then the concrete to form the section II is poured adjacent the section III to cover the devices 22. The shape of the grooved plate 26 produces a hinge-like joint between the concrete sections Ill and I I which is held securely together by means of the tying devices without the unnecessary and uneconomical use of thickened center joints, thereby effecting a great saving in concrete.

Referring to that embodiment of the invention illustrated in Figs. 7 and 8, a straight plate 29, apertured at 30, is shown in lieu of the grooved plate 26. As heretofore described, the form 24, apertured at to register with the apertures 30 of the plate 29, is set up to define the section I0 to be poured. The plate 29 is positioned adjacent the inner surface of that part of the form 24 which defines the edge of the section III which will abut the section I I. The inserts I2 are fixed in their intended positions by bolts 28 extending through the form 24 and plate 29 into the screw threaded bodies I6 of said inserts I2. After the concrete III has been poured and becomes set, the bolts 28 and form 24 are removed, thus exposing the plate 29 and internally screw threaded portion I! of the inserts I2. As previously explained, suitable tying devices such as the hook bolts 22 or devices 3|, 32, 33 or 34 are screwed into the inserts I2 and the concrete to form the section I I is poured adjacent the section III to cover said tying devices.

It will be understood that the method herein described may be used in the construction, repairing, widening and resurfacing of roads, and that the form of the inserts and tying devices herein shown and described may be varied without departing from the scope of my invention. An important feature of the invention lies in the forming of reinforced screw threaded bores in the side of the concrete of one section adjacent to which another section is to be formed, whereby tying means may be fixed in one section to extend into another after the first section has been 6 formed and the grading and preparatory work for the second section has been completed.

While I prefer to use the internally screw threaded form of anchoring devices I2 herein shown and described, my invention is not limited 7 thereto, and I may use other forms of anchoring devices which are adapted to be embedded in the concrete as it is being poured and thereafter attach to an exposed portion of the anchoring device, after the concrete has been formed, suit- 7 able tying devices -to. be embedded in the concrete to be poured to form an adjacent section. It is also to be understood that when I refer to tying devices" in the claims I do not intend to be limited to hook or angle shaped devices but intend to include as well those types of tying devices which are adapted to permit relative movement of adjacent sections.

I claim:'

1. The method of constructing concrete roads which comprises embedding a plurality of nonprotruding anchoring devices in the side of one section of concrete at the time the concrete is poured, attaching tying devices to said anchoring devices after the concrete has been -formed, and pouring concrete toiorm an adjacent section and thereby embedding the tying devices secured to the first section;

2. The method of constructing concrete roads which comprises setting up a form confining a concrete section to be formed, ailixing to the form, between the upperand lower edges of the form and within the form, a plurality of spaced apart non-protruding anchoring devices, pouring concrete'within the form to cover the anchoring devices, removing the form and'exposing theends of the anchoring devices, securing tying devices to the anchoring devices so as to project in a substantially horizontal plane from said anchoring devices, and pouring a second concrete section adjacent the first and thereby embedding said tying devices in said adjacent section.

3. The method of constructing concrete roads which comprises setting up a form confining a concrete section to be formed, afiixing to the form, between the upper and lower edges of the form, a plurality of spaced apart, internally screw threaded anchoring devices, pouring concrete within the form to cover the anchoring devices, removing the form and exposing the ends of the anchoring devices, screwing tying devices into the internally threaded anchoring devices so as to project from said anchoring devices, and

pouring a second concrete section adjacent the first and thereby embedding said tying devices-in said adjacent section.

4. The method of constructing concrete roads which comprises setting up aform defining a concrete section to be formed, positioning adjacent the form a vertical, apertured plate, af-

fixing to the plate and the form a plurality of I spaced apart, internally screw threaded anchoring devices, pouring concrete within the form to cover-the anchoring devices, removing the form and thereby exposing the apertured plate and internally screw threaded ends of the anchoring devices, screwing tying devices into the anchoring devices to project beyond said concrete section and plate, and pouring a second concrete section adjacent the first and thereby embedding said tying devices in said adjacent section.

'5. The method of constructing concrete roads which comprises setting up a form defining a concrete section to be formed, positioning adjacent the form an apertured, grooved, hingeproducing plate, affixing to the hinge-producing plate and the form a plurality 'of spaced apart anchoring devices, pouring concrete within the form to cover the anchoring devices, removing the form and grooved plate and thereby exposing the ends of the anchoring devices, securing tying devices to the anchoring devices to project beyond said concrete section, and pouring a second concrete section adjacent the first and thereby embedding said tying devices in said adjacent section.

6. The method of constructing concrete roads which comprises setting up a form defining a concrete section to be formed, positioning adjacent the forman apertured, grooved, hingeproducing plate, afiixing to the hinge-producing plate and the form a plurality of spaced apart, internally screw threaded anchoring devices, pouring concrete within the form to cover the anchoring devices, removing the form and thereby exposing the apertured hinge-producing plate and the internally screw threaded ends of the anchoring devices, screwing tying devices into the anchoring devices to project beyond said concrete section and plate, and pouring a second concrete section adjacent the first and thereby embedding said tying devices in said adjacent 1

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