JP2003268707A - Elastic pavement structural body and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve withstand load strength and permeability of a surface elastic layer without causing the displacement and falling thereof even after a long time is passed by surely fixing the surface elastic layer to paved road bed. <P>SOLUTION: The area of the garden of 200 m<SP>2</SP>of an amusement ground in which a high bar, a jungle gym, a slide, and a swing are fixed to a concrete part with anchor bolts around the anchor bolts is dug 80 mm deep, rolled by a damping roller for compacting, crushed stones with diameters of 5 to 20 mm are paved and compacted to a height of 50 mm, and urethane as a primer is filled into a crushed stone layer to bond the crushed stones to each other for complete integration. Rubber particles crushed to those of averaged grain sizes of 3 to 5 mm are mixed into urethane resin liquid, bedded on an inorganic aggregate layer 2 with a thickness of 20 mm, and color rubber chips of 1 to 3 mm in grain size are paved to a thickness of 10 mm to integrally form the entire part of the structural body. <P>COPYRIGHT: (C)2003,JPO

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 and its construction method. More specifically, the present invention provides
Mainly composed of inorganic aggregate layer, primer thin film layer, base elastic layer, and surface elastic layer, and improved overall construction stability, load bearing strength, water permeability, cushioning property, etc. The present invention relates to a pavement structure and a construction method thereof.

[0002]

2. Description of the Related Art The term "elastic pavement structure" used in the present invention is broadly defined as a structure provided on a roadbed and having a surface layer made of a rubber elastic material.

The elastic pavement structure uses the rubber chip directly for the cushioning effect, provides a comfortable walking feeling with the cushioning effect, and has a sound absorbing effect, and the elasticity and cushioning effect peculiar to the rubber prevent the injury from falling. The purpose is.

As an application suitable for this purpose, the elastic pavement structure is used in various sports courts, promenades, kindergartens, parks, amusement parks, shopping malls, schoolyards and the like.

Various elastic pavement constructions have been proposed in the past. For example, Japanese Patent Laid-Open No. 9-228308 discloses
On the roadbed where crushed stone or asphalt concrete is placed, an elastic layer in which rubber chips are bonded with a binder such as urethane resin is formed, and an uneven protective layer of urethane resin is formed on the surface of the elastic layer. An elastic structure with sand filled with sand is described above. In this conventional technique, the elastic layer in which the rubber chips are bonded by the binder such as urethane resin is directly formed on the crushed stone laid on the roadbed, so that the crushed stones move to each other during a long time, and as a result, However, there is a drawback that the layer above the crushed stone layer is displaced or peeled off.

Japanese Unexamined Patent Publication No. 2000-199201 discloses a tile rubber made of a synthetic resin having flexibility, in which a mixture layer made of elastic chips, an inorganic aggregate such as crushed stone, and a binder is formed on a roadbed. An elastic pavement structure having a block pattern is described. This elastic pavement structure
The elastic layer formed on the inorganic aggregate layer such as crushed stone has only one elastic layer made of a tile-shaped rubber block, and thus the elasticity of the entire pavement structure is insufficient. Therefore, even if this elastic pavement structure is laid around, for example, a playground in a kindergarten, amusement park, or a park, it is not possible to sufficiently prevent an injury or the like when an infant falls.

All the above-mentioned elastic pavement structures are lacking in elasticity as a whole, construction stability on roadbeds, load bearing strength and the like. Therefore, the conventional elastic pavement structure cannot sufficiently exhibit the effects of the elastic pavement structure described above, and therefore its use is limited.

[0008]

The problem to be solved by the invention is that the rubber elastic layer, which is the outermost surface layer, is securely fixed to the roadbed to be paved, and remains the outermost surface layer even after a long time elapses. It is impossible to prevent the rubber elastic layer from slipping off or coming off.

Another problem to be solved by the invention is that the pavement structure cannot be sufficiently provided with load bearing strength and water permeability in the thickness direction.

Still another problem to be solved by the invention is that when the pavement structure is used in various sports courts, promenades, kindergartens, parks, amusement parks, shopping malls, schoolyards, etc., the user may be injured even if he or she falls. The point is that it is not possible to provide sufficient cushioning properties to minimize the above.

Still another problem to be solved by the invention is to pave a park, an amusement park, a schoolyard, a kindergarten, etc. in which playground equipment such as a swing, a bar, a jungle gym, and a slide are fixed to concrete parts with anchor bolts. In this case, the entire road surface cannot be completely paved without removing those playground equipment.

[0012] Further problems and advantages to be solved by the invention will be successively revealed below.

[0013]

In order to solve the above-mentioned problems, the present inventor has found that on a subbase, a subbase consisting of a lower subbase and an upper subbase, a base layer on the subbase, and an elastic layer on the base sublayer. Reference was made to full-scale asphalt pavement in which the surface layers of the body were sequentially laminated and integrated.

As a result, according to the invention, an inorganic aggregate layer, which has been primed and bonded to each other, on various roadbeds,
An elastic pavement structure is provided in which a primer thin film, a base elastic layer, and a surface elastic layer are sequentially laminated and integrated.

Further, according to the present invention, a step of digging the roadbed around the anchor bolt to a predetermined depth without removing various swingers, jungle gyms, iron bars, slides, etc. fixed to the concrete portion with anchor bolts. Then, the step of compacting the dug roadbed, laying crushed stones on it, and compacting it to form an inorganic aggregate layer, and pouring a primer treatment agent into the inorganic aggregate layer, bonding the crushed stones together and completely integrating And simultaneously form a thin film of the primer on the surface of the inorganic aggregate layer, and a mixture of rubber particles and a resin liquid is spread on the inorganic aggregate layer through the thin film of the primer to form the base elastic layer. Provided is a method for constructing an elastic pavement structure, which comprises a step of forming and a step of spreading color rubber chips forming a surface elastic layer on a base elastic layer and integrating the whole. .

The configuration of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a subgrade, which is a portion under the pavement and is sometimes referred to as a foundation. INDUSTRIAL APPLICABILITY The present invention can be used for roadbeds of various sports courts, promenades, kindergartens, parks, amusement parks, shopping malls, schoolyards, etc., in addition to ordinary roads.

Reference numeral 2 is an inorganic aggregate layer. As the inorganic aggregate used in the present invention, various kinds of natural and artificial aggregates can be used. The most preferable aggregate in the present invention is crushed stone having an average particle size of 5 to 20 mm. Examples of crushed stone include aggregate for concrete (JIS A5005) and road (JIS
A5001), which is used for laying railway track beds.

When the average particle size of the inorganic aggregate is 5 mm or less,
It is not preferable because the water permeability of the entire pavement structure after the construction is completed is lowered. On the other hand, if the average particle size of the inorganic aggregate is 20 mm or more, the water permeability of the entire pavement structure after the construction is completed is increased, but the load bearing strength is somewhat decreased, which is not preferable.

The thickness of the inorganic aggregate layer 2 is 30 to 50 mm. When the thickness of the inorganic aggregate layer 2 is 30 mm or less, the roadbed lacks stability and load bearing strength. On the contrary, when the thickness of the inorganic aggregate layer 2 is 50 mm or more, the construction cost is increased, which is not preferable.

After laying the inorganic aggregate layer 2 in a predetermined thickness, it is necessary to compact the inorganic aggregate by rolling to apply it to the roadbed.

After the inorganic aggregate layer 2 is spread to a predetermined thickness, it is compressed to compact the inorganic aggregate and apply it to the roadbed, and then it is treated with a primer to separate the inorganic aggregates from each other. Combine and stabilize. At this time, it is important that the primer sufficiently penetrates the entire inorganic aggregate layer 2 to bond the inorganic aggregates together, and at the same time, to form the resin thin film 3 on the surface of the inorganic aggregate layer 2. Urethane is preferred as the primer.

Reference numeral 4 is a base elastic layer. The base elastic layer 2 is obtained by mixing rubber particles having an average particle diameter of 3 to 5 mm with a primer, for example, a urethane resin liquid, and spreading the rubber particles uniformly on the primer thin film 3 as a base. The thickness of the base elastic layer 2 is not particularly limited, but is preferably in the range of 10 to 30 mm. When the thickness of the base elastic layer 2 is 10 mm or less, sufficient cushioning properties cannot be exhibited after construction. On the contrary, when the thickness of the base elastic layer 2 is 30 mm or more, not only the construction cost is raised but also the physical properties become excessive, which is not preferable.

The material of the rubber particles used for the base elastic layer 2 is not particularly limited, but if various used rubbers such as cut pieces of various rubber products, used tires, used weather strips, etc. are reused. It is also preferable because it contributes to resource saving.

Reference numeral 5 is a surface elastic layer. Surface elastic layer 5
Is finished with so-called color rubber chips that are colored in the desired color according to the application, the request of the owner, etc. The surface elastic layer 5 is
Color rubber chips with an average particle size of 1 to 3 mm and a thickness of 5 to 2
Finish to 0 mm. The thickness of the surface elastic layer 5 is preferably changed according to the application. The thickness of the surface elastic layer 5 is 5
If it is less than mm, sufficient load bearing strength and cushioning properties cannot be obtained, which is not preferable. The thickness of the surface elastic layer 5 is 2
When it is 0 mm or more, not only the construction cost is raised, but also the physical properties become excessive, which is not preferable.

In the elastic pavement structure of the present invention thus constructed, the inorganic aggregates constituting the inorganic aggregate layer 2 are completely bonded by the primer, so that a strong roadbed is formed. In the conventional elastic pavement structure, there is an example in which an elastic material is laid directly on sand or gravel, but in the case of this conventional technique, the elastic layer of the surface layer may be displaced from the sand or gravel layer or may be peeled off. However, the elastic pavement construction of the present invention overcomes this disadvantage of the prior art.

In the elastic pavement structure of the present invention constructed as described above, since the inorganic aggregates constituting the inorganic aggregate layer 2 are completely bonded with the primer, a strong roadbed is formed at the same time. Since the thin film 3 of the primer formed on the surface of the inorganic aggregate layer 2 and the rubber particles constituting the base elastic layer 4 mixed with the primer liquid are completely adhered,
The inorganic aggregate layer 2 and the base elastic layer 4 are the thin film 3 of the primer.
It is completely integrated through.

In the elastic pavement structure of the present invention thus constructed, the inorganic aggregate layer 2, the base elastic layer 4, and the surface elastic layer 5 are composed of particles in a specific range, so that the whole structure is obtained. Immediately permeable.

The elastic pavement structure of the present invention thus constructed has the surface elastic layer 5 and the base elastic layer 4 underlying the surface elastic layer 5.
In addition, since rubber particles having different average particle diameters are used, the cushioning effect of both layers acts synergistically as compared with the case where there is only one elastic layer or the case where there is one thick elastic layer. , Great cushioning effect.

In the elastic pavement structure of the present invention thus constructed, the base elastic layer 4 supports the surface elastic layer 5,
There is an effect that the load applied together with the surface elastic layer 5 is dispersed and transmitted to the inorganic aggregate layer 2. At this time, the primer thin film 3 interposed between the base elastic layer 4 and the inorganic aggregate 2 also contributes to the action of dispersing the load stress.

By the way, asphalt pavement is a typical pavement method for "flexible pavement" on the road surface. Asphalt pavement is a method in which asphalt pavement is performed on a sufficiently solid base layer such as concrete, or gravel roads are treated with asphalt such as straight emulsion, cutback asphalt, or aggregate.

The asphalt pavement has an advantage that it can pave a relatively large area at low cost, but has the following drawbacks. That is, asphalt pavement requires relatively large-scale equipment and facilities such as an asphalt distributor, an asphalt kettle, an asphalt mixer, an asphalt spreader, an asphalt sprayer, and a macadam roller. Therefore, when asphalt paving a park, amusement park, schoolyard, kindergarten, etc. where playground equipment such as horizontal bars, jungle gyms, slides, and horizontal bars is already installed, these playground equipment must be completely removed. Furthermore, asphalt curing requires at least 7 days, which is a factor that prolongs the construction period and raises construction costs.

However, according to the invention, the swing,
When paving a park, amusement park, schoolyard, kindergarten, etc. where playground equipment such as horizontal bars, jungle gyms, slides, etc. are fixed to the concrete part with anchor bolts, without pausing those playground equipment, the road surface around the anchor bolts must be removed. Can be dug by hand and constructed. This is particularly advantageous, for example, when a play equipment such as a jungle gym fixed to the concrete portion with dozens of anchor bolts is already installed. Further, the pavement method of the present invention requires no curing, and the surface elastic layer can be applied immediately after the completion of the groundwork, so that the advantages of both are combined, and the construction period is greatly shortened compared to asphalt pavement.

The present invention will be described in detail below with reference to examples.

[Examples] A kindergarten garden having an area of 200 m2 in which an iron bar, a jungle gym, a slide, and a swing are fixed to a concrete portion by anchor bolts was constructed with the elastic pavement structure of the present invention.

First, the iron rod, the jungle gym, the slide, and the swing were not removed, and the periphery of the anchor bolt was dug 80 mm. The dug roadbed 1 was compacted by rolling with a tamping roller. A crushed stone having a diameter of 5 to 20 mm is laid on it, and it is rolled with a tamping roller to give a thickness of
It was compacted to 0 mm to form the inorganic aggregate layer 2.

Then, urethane was poured into the inorganic aggregate layer 2 as a primer to bond the crushed stones to each other so that they were completely integrated. At this time, the primer thin film 3 was formed on the surface of the inorganic aggregate layer 2.

Next, a recovered weather strip manufactured by Hiroshima Kasei Co., Ltd., and rubber particles obtained by crushing cutting scrap rubber to have an average particle size of 3 to 5 mm are mixed with a urethane resin liquid to form an inorganic aggregate layer 2
20mm thick with a thin film of primer 3
The base elastic layer 4 was formed.

Finally, a particle size of 1 to 3 m is formed on the base layer 4.
m color rubber chips were spread to a thickness of 10 mm, the whole was integrated, and the construction was completed.

The elastic pavement structure of the present invention thus constructed has a total thickness of 80 mm and a weight of 2 per 1 m 2.
It was 9.5 kg,

[0039]

According to the invention described in claim 1, the thin film 3 of the primer formed on the surface of the inorganic aggregate layer 2, the rubber particles constituting the base elastic layer 4 mixed with the primer liquid, and the surface elastic layer. Since the respective layers 5 are completely adhered and integrated, the rubber chip constituting the surface elastic layer 5 does not shift or peel off from the base elastic layer 4 of the base, and the water permeability, cushioning property, and resistance An elastic pavement structure excellent in load strength and the like is provided.

According to the second aspect of the present invention, by changing the particle size of the crushed stone of the inorganic aggregate layer 2 in the range of 5 to 20 mm, it is possible to impart a desired load bearing strength to the base.

According to the third aspect of the invention, by using the rubber particles of the base elastic layer 4 in a particle size range of 3 to 5 mm, desired cushioning properties can be imparted.

According to the invention described in claim 4, the effect of the elastic pavement structure of the present invention can be maximized.

According to the invention described in claims 5 to 8, when paving a park, amusement park, schoolyard, kindergarten or the like in which play equipment such as a bar, a jungle gym, a slide, and a bar is fixed to a concrete portion with anchor bolts. , You can dig the road surface around the anchor bolts manually without removing those playground equipment, and because it does not require long-term curing like asphalt pavement, these advantages are combined and the construction period can be improved. Significantly shortened.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of an elastic pavement structure of the present invention.

[Explanation of symbols]

1 roadbed 2 Inorganic aggregate 3 Primer thin film 4 Base elastic layer 5 Surface elastic layer

Claims (8)

[Claims] 1. An inorganic aggregate layer 2, a primer thin film 3, a base elastic layer 4, and a surface elastic layer 5, which are treated with a primer and bonded to each other, are sequentially laminated and integrated on various subgrades. Elastic pavement construction. 2. The inorganic aggregate layer 2 has an average particle size of 5 to 20 mm.
The elastic pavement structure according to claim 1, which is composed of crushed stone. 3. The elastic pavement structure according to claim 1, wherein the base elastic layer 4 is composed of rubber particles having a particle diameter of 3 to 5 mm. 4. The thickness of the inorganic aggregate layer 2 which is treated with a primer and bonded to each other is 30 to 50 mm, the thickness of the base elastic layer 4 is 10 to 30 mm, and the thickness of the surface elastic layer 5 is 5-2.
The elastic pavement construction of claim 1 having a thickness of 0 mm. 5. (a) The roadbed 1 around the anchor bolt is dug down to a predetermined depth without removing various swingers, jungle gyms, iron bars, sliding fittings, etc. that are fixed to the concrete part with anchor bolts. Process, (b) A process of compacting the dug roadbed, crushing stones on it, compacting to form the inorganic aggregate layer 2, and (c) pouring a primer treatment agent into the inorganic aggregate layer 2. A step of binding the crushed stones to be completely integrated, and at the same time forming the thin film 3 of the primer on the surface of the inorganic aggregate layer, and (d) a mixture of the rubber particles and the resin liquid on the inorganic aggregate layer, A step of forming a base elastic layer 4 by laying it through a thin film of a primer, and (e) a step of laying a color rubber chip forming a surface elastic layer 5 on the base elastic layer 4 and integrating the whole. Elastic pavement Construction method of the body. 6. The inorganic aggregate layer 2 has an average particle size of 5 to 20 mm.
The construction method according to claim 5, which is composed of crushed stone. 7. The method according to claim 5, wherein the base elastic layer 4 is composed of rubber particles having a particle diameter of 3 to 5 mm. 8. The thickness of the inorganic aggregate layer 2 bonded to each other by a primer treatment is 30 to 50 mm, the thickness of the base elastic layer 4 is 10 to 30 mm, and the thickness of the surface elastic layer 5 is 5 to 2.
It is 0 mm, The construction method of Claim 5.