JPH04126902U - Paved road subgrade structure - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention provides a subgrade structure for paved roads that can absorb and alleviate pressure, shock, and vibration caused by heavy vehicles running on the road. [Structure] This is a paved road subgrade structure in which rubber pieces are randomly scattered in the gravel layer that makes up the subgrade.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the structure of the ground or roadbed of a paved road.

0002

[Conventional circumstances]

The roadbed of a paved road is generally made of gravel, with asphalt on top. The road surface is constructed by forming a layer. This asphalt layer is originally formed to increase the durability of the road surface. However, as is well known, repeated pressure, shock, and vibration caused by the traffic of heavy vehicles etc. This can lead to distortions such as cracks and unevenness in the road surface itself, as well as depressions and road damage caused by shifting of gravel on the road bed. It causes phenomena such as shoulder collapse, which not only hinders traffic but also poses a problem in terms of appearance. was there. It should be noted that repeated road repair work is not only uneconomical, but also destroys the construction itself. This can also cause traffic problems.

0003

[Problem that the idea aims to solve]

This invention was made in view of the conventional situation, and is suitable for heavy vehicles running on road surfaces. To provide a subgrade structure for paved roads that can absorb and alleviate to some extent the pressure, shock, and vibration caused by It is something.

0004

[Means to solve the problem]

In order to solve the above problems, the present invention provides rubber pieces 3 to the gravel layer 1 constituting the roadbed. It is randomly mixed and scattered to form the subgrade structure of a paved road. In this case, the size of the rubber pieces 3 should be the average size of the gravel particles 2 to ensure uniform mixing. The amount of rubber pieces 3 mixed is preferably 10 to 2 per 100 of the gravel grains 2. It is desirable to set it to 0 in order to maintain an appropriate relative stress relationship.

[0005]

[Action and effect]

When a heavy vehicle passes on the paved road surface, the road surface asphalt layer 4 and the ground Heavy pressure loads, impact forces, vibrations, etc. are transmitted to the subgrade. However, in the roadbed of the present invention, rubber pieces 3 are randomly mixed into the gravel layer 1 as described above. Because they are scattered, the above-mentioned heavy pressure loads, impact forces, vibrations, etc. are absorbed by the rubber on this roadbed. It is absorbed and relaxed by the elastic action of the pieces.

[0006] To explain in more detail, because the rubber piece 3 is interposed between the gravel grains 2, it is possible to The force applied by the rubber piece 3 is used as a medium to relieve the pressure. It acts as an absorbing force against shock and as a blocking force against vibration. and that The sum of these stresses can cause local or overall displacement, depression, distortion, etc. of the subgrade or road surface. It is possible to prevent this and reduce the force exerted on others, such as the collapse of the road shoulder. As a result, not only traffic safety but also the appearance of the road is maintained, and road repair work is possible. It extends the cycle and is economically advantageous. The rubber piece 3 can be made from recycled and processed waste rubber, so it is economical from a material standpoint. can ensure sex.

[0007]

【Example】

The following will be explained with reference to the embodiments of the drawings. In Fig. 1, 1 is gravel constituting the roadbed. In the layer, rubber pieces 3 of the average size of the gravel grains 2 are added to the gravel grains 2 that make up the gravel layer 1. It is formed by randomly mixing and scattering at a ratio of 10 to 20 to 100 of gravel grains 2. The road surface is constructed by forming an asphalt layer 4 on top of the roadbed structure.

[Brief explanation of drawings]

[Figure 1] Longitudinal side view showing the subgrade structure of the present invention

[Explanation of sign]

1 Gravel layer 2 Gravel grains 3 Rubber piece 4 Asphalt layer

Claims (3)

[Scope of utility model registration request] 1. A roadbed structure for a paved road, characterized in that rubber pieces 3 are randomly mixed and scattered in a gravel layer 1 constituting the roadbed. 2. The roadbed structure of a paved road according to claim 1, wherein the rubber pieces 3 have an average size of the gravel particles 2. [Claim 3] The amount of mixed rubber pieces 3 is equal to the amount of gravel grains 2 equal to 10.
3. The roadbed structure of a paved road according to claim 1 or 2, wherein the ratio is 10 to 20 compared to 0.