JPH086281B2 - Elastic pavement construction method and elastic pavement structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic pavement structure most suitable for sidewalks, golf course paths or jogging courses. More specifically, it is provided with a predetermined thickness between a pair of opposing curbs. The present invention relates to a method for constructing an elastic pavement structure in which an elastic pavement layer obtained by solidifying a chip material of rubber or elastic synthetic resin with a binder is constructed on an underlayer, and the elastic pavement structure.

[0002]

2. Description of the Related Art Exercise on a so-called hard floor made of concrete, epoxy resin, latex cement, urethane resin, etc. may cause lower limb disorders such as ankle joints and knee joints. The so-called elastic floor has been reviewed. However, these elastic floors are expensive to construct and difficult to maintain. Therefore, there is provided a so-called elastic pavement using an elastic pavement layer in which rubber, cork, elastic synthetic resin, or the like is made into small pieces or particles, and these are bonded with a binder resin. This elastic pavement is attached and fixed onto the asphalt pavement layer, which is the base layer, by a primer made of the same type of resin as the binder resin. When a sidewalk, a golf course, a jogging course, or the like is constructed with such an elastic pavement, curbs are provided at both ends in the width direction orthogonal to the extending direction, and the elastic pavement is performed between them. There is.

An example of such a conventional elastic pavement structure is
Explaining with reference to FIG. 4, in the place where the elastic pavement is constructed,
Crushed stone layer 1 with a certain width and thickness along the extending direction
And a pair of curbs 2 and 3 are laid on the crushed stone layer 1 in the extending direction and the upper surface thereof is at the same level as the elastic pavement. Next, for example, asphalt concrete is spread on these curbs 2 and 3 to form an asphalt pavement layer 4, and rubber, cork, elastic synthetic resin, or the like is made into small pieces or particles on the asphalt pavement layer 4,
The elastic pavement layer 5 in which these are bonded with a binder resin is applied. The elastic pavement layer 5 is attached and fixed to the asphalt pavement layer 4 by a primer made of the same kind of resin as the binder resin.

[0004]

[Problems to be Solved by the Invention] However, the sidewalk,
When constructing the asphalt pavement layer 4 in a relatively short area such as a golf course or a jogging course, the asphalt pavement layer 4 cannot be sufficiently compacted or the asphalt pavement layer 4 is not thick enough. Or
The temperature of the asphalt material may not be accurately controlled, and the strength, thickness, and density of the asphalt pavement layer 4 may vary widely. On the other hand, the elastic pavement layer 5
Since thermal expansion and contraction, or swelling and drying and contraction due to water absorption due to rainfall and the like are repeated, a large stress acts on the bonding portion with the asphalt pavement layer 4. Therefore, when the elastic pavement layer 5 is applied on the asphalt pavement layer 4 in the unstable state as described above, a crack is generated from the end portion 6 of the elastic pavement layer 5 and the aggregate of the asphalt pavement layer 4 is attached. It will be lifted. In such a phenomenon, when the elastic pavement is made water-permeable to prevent slippage due to water wetting, the asphalt pavement layer 4 is also made of water-permeable asphalt concrete, so the amount of asphalt is smaller than that of dense-grained asphalt concrete. Since the density is low, it occurs particularly remarkably.

Therefore, an object of the present invention is to provide a construction method capable of reliably fixing an elastic pavement layer to an underlayer by an extremely easy process.

Another object of the present invention is to provide an elastic pavement structure which does not separate from the underlayer even when it ages.

[0007]

SUMMARY OF THE INVENTION The present invention is an elastic pavement layer in which a chip material such as rubber or elastic synthetic resin is fixed with a binder on a base layer provided with a predetermined thickness between a pair of opposing curbs. In the construction method of the elastic pavement for constructing, the concave portion lower than the upper surface of the foundation layer is provided at the boundary between the foundation layer and the curb, and the elastic pavement layer is embedded in the concave portion.

The elastic pavement structure of the present invention is provided at the boundary between the underlayer and the curb, has a recess lower than the upper surface of the underlayer, and the elastic pavement layer is also embedded in the recess. It is what

[0009]

[Function] As a result, a portion extending downward is formed at the end of the elastic pavement layer along the curb, and an anchor effect occurs in this part, and the stress due to expansion and contraction of the elastic pavement layer causes cracks from the end of the elastic pavement layer. Can be prevented from entering and lifting. Therefore, even when the strength of the foundation layer is insufficient due to insufficient rolling pressure, or even when the amount of asphalt and its density are low to give water permeability like water-permeable asphalt concrete, the edges of the elastic pavement layer can be reliably lifted. Can be prevented.

Further, the elastic pavement structure of the present invention has a part extending downward at the end, and an anchor effect can be provided at this part, and the end of the elastic pavement layer is lifted by expansion or contraction. To ensure that the elastic pavement structure has water permeability, it is possible to reliably retain the ends of the elastic pavement layer even when using a low density underlayer such as water-permeable asphalt concrete. it can.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. The constituent elements that are substantially the same as those in the above-mentioned conventional example are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 1 shows a first embodiment of the present invention, in which an asphalt pavement layer 4 is placed between curbs 2 and 3 and both end portions on the side of the curbs 2 and 3 are between side faces of the curbs 2 and 3. It is constructed so as to form a gap 11 where the crushed stone layer 1 is exposed. Such a gap 11 has a width of, for example, 25 mm on the crushed stone layer 1 so that one surface of the gap 11 abuts on the opposite side surfaces of the curbs 2 and 3.
A square timber with a height of 40 mm is installed so that its upper surface is substantially aligned with the upper surfaces of the curbs 2 and 3, and the asphalt material is laid between these timbers, and the timber is used as a guide for rolling compaction to perform asphalt pavement. After forming the layer 4, the timber is removed. This gives a gap 1 with a width of 25 mm and a depth of 40 mm.
1 is formed. The elastic pavement layer 5 is applied to the asphalt pavement layer 4 to have a thickness of, for example, 20 mm, and the end portion 6 of the elastic pavement layer 5 is also integrally applied so as to be applied to these gaps 11. In this case, the end portion 6 has a width of 25
mm, length is 40 mm.

As described above, the end portion 6 of the elastic pavement layer 5 is substantially L-shaped.
It is in the shape of a letter, and its tip portion has a shape that hangs in the direction of the crushed stone layer 1 and can exert an anchor effect, and can counter the stress due to the expansion and contraction as described above. Therefore, in order to form a water-permeable elastic pavement structure, even if the asphalt pavement layer 4 is made of water-permeable asphalt concrete having a smaller amount of asphalt and a lower density than dense-grained asphalt concrete, the end portion 6 of the elastic pavement layer 5 is It doesn't lift.

The second embodiment shown in FIG. 2 is an example in which the asphalt pavement layer 4 is thick, and a substantially L-shaped gap 11 which will be described later is formed in both edge portions of the asphalt pavement layer 4 on the side of the curbs 2 and 3. The concave portions 12 corresponding to the above are formed, and the end portions 6 of the elastic pavement layer 5 are integrally formed in the concave portions 12. The recess 12 may be formed by using a square bar having an appropriate size as in the first embodiment.

In each of the above-mentioned embodiments, the end portion 6 of the elastic pavement layer 5 is integrally formed of the same material as the elastic pavement layer 5, but in the third embodiment shown in FIG. 3, the bottom of the recess 12 is formed. The filler is prepared by mixing a large number of small stones 13 and rubber chips 14 using a binder to a certain depth, and then the elastic pavement layer 5 is applied.

In order to secure the anchor effect in each of the above-mentioned embodiments, the thickness of the elastic pavement layer 5 is A, the depth of the end portion 6 is B, and the depth of the end portion 6 is as shown in FIG. Width is C
Then, it is preferable to have a relationship of A <B ≦ C.

[0017]

As described above, according to the construction method of the elastic pavement of the present invention, a recess lower than the upper surface of the foundation layer is provided at the boundary between the foundation layer and the curb, and the elastic paving layer is buried in the recess. This is a simple process, which prevents the elastic pavement layer from having an anchor effect at the end along the curb and preventing cracks from rising from the end of the elastic pavement layer due to stress due to expansion or contraction of the elastic pavement layer. You can Therefore, even if the strength of the underlying layer is insufficient due to unrolling pressure, or even if the amount of asphalt or its density is low due to the water permeability of permeable asphalt concrete, the edge of the elastic pavement layer is reliably prevented from being lifted. can do. Such a recess can be formed by a simple operation of arranging a wooden frame along a curb, for example.

Further, the elastic pavement structure of the present invention is provided at the boundary between the underlayer and the curb, has a recess lower than the upper surface of the underlayer, and the elastic pavement layer is also embedded in the recess. With a simple structure in which the side of the elastic pavement layer is embedded in the recess, it is possible to give the end an anchor effect, and it is possible to reliably prevent the end of the elastic pavement layer from being lifted due to expansion or contraction. In addition, since the elastic pavement structure is made to have water permeability, the end portion of the elastic pavement layer can be reliably held even if a low-density base layer such as water-permeable asphalt concrete is used.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of an elastic pavement structure manufactured by a construction method of the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment.

FIG. 3 is a vertical sectional view showing a third embodiment.

FIG. 4 is a vertical cross-sectional view showing an example of a conventional elastic pavement structure.

[Explanation of symbols]

 1 Crushed stone layer 2, 3 Curb 4 Asphalt pavement layer 5 Elastic pavement layer 6 Edge 11 Gap 12 Recess 13 Pebble 14 Rubber chip

Claims (2)

[Claims] 1. A method for constructing an elastic pavement in which an elastic pavement layer obtained by hardening a rubber or elastic synthetic resin chip material with a binder is applied on a base layer provided with a predetermined thickness between a pair of opposing curbs. 2. The method for constructing an elastic pavement, wherein a recessed portion lower than the upper surface of the basement layer is provided at a boundary portion between the foundation layer and the curb, and the elastic paving layer is embedded in the recessed portion. 2. An elastic pavement structure in which an elastic pavement layer obtained by hardening a rubber or elastic synthetic resin chip material with a binder is applied on a base layer provided with a predetermined thickness between a pair of opposing curbs. The elastic pavement structure according to the invention, wherein the elastic pavement layer is provided at a boundary portion between the foundation layer and the curb and has a concave portion lower than an upper surface of the foundation layer, and the elastic paving layer is also embedded in the concave portion. body.