JPH1082010A - Road structure in which noise by vibration of structure is reduced - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent noises due to the vibrations of a structure by laying a paving material, in which aggregate and a small piece or powder-shaped rubber are bonded by polyurethane, on the foundation road surface of a viaduct. SOLUTION: A paving material 3 is composed by bonding aggtrgate consisting of pebbles, sand, metallic chips, fiber chips, etc., and a small piece or powder- shaped rubber obtained by crushing a waste tire by polyurethane. A rood structure is formed by laying the paving material 3 on a viaduct road-surface foundation made up of reinforced concrete placed on a support 1 at the time of the execution of works. the road structure consisting of two layers is formed by laying an asphalt paving material on the viaduct road-surface foundation composed of reinforced concrete 2 and laying the paving material 3 on the asphalt paving material in place of the road structure. Road structure made up of two layers is formed by laying the paving material 3 on the viaduct road-surface foundation composed of reinforced concrete 2 and laying the asphalt paving material on the paving material 3 in place of the road structure consisting of the two layers. Accordingly, the generation of noises from the structure with the travelling of a car can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road structure for reducing noise generated by vehicles traveling on viaducts such as elevated roads, and more particularly, to noise caused by vibration of structures such as viaducts. The present invention relates to a road structure with reduced traffic.

[0002]

2. Description of the Related Art In recent years, the transportation of cargo by vehicles and the transfer to recreational areas have been frequently performed, and thus the expressway network has been expanded. However, traveling by vehicle has become extremely convenient, but on the other hand, the deterioration of the environment due to the noise during the traveling of the vehicle has been increasing.

In particular, noises generated from highways include noise directly transmitted by noise sources such as engine noise of a vehicle, wind noise of a vehicle, and running noise generated from tires;
In particular, a viaduct or the like is excited as the vehicle travels, and is roughly divided into noise that propagates through a structure where noise is generated. However, for noise transmitted directly from the above-mentioned noise source to the human ear, noise prevention measures or sound absorbing walls are installed on both sides of the road to prevent noise.

[0004]

At present, however, no effective countermeasure has been taken against the latter noise that propagates through the structure. In other words, the pillars, viaducts, asphalt pavements, and the like that constitute viaducts and the like do not have a structure that actively absorbs vibrations from the traveling vehicle, so that such noise cannot be reduced. . An object of the present invention is to provide a road structure for reducing the latter noise, that is, the noise that propagates through a structure generated when a structure such as a viaduct is excited as the vehicle travels. is there.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the invention is to combine aggregates made of pebbles and sand and small pieces or powdery rubber with polyurethane. This is laid on a basic road surface on a viaduct, and relates to a road structure in which noise caused by vibration of a structure is reduced.

[0006] In other words, a pavement material in which aggregate and small pieces or powdery rubber are bonded by polyurethane is laid on the foundation road surface on the viaduct, and the running vehicle is isolated from the structure constituting the viaduct. It is intended to provide a road structure in which noise due to vibration is reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a conventional structure such as a viaduct, a road surface foundation of a reinforced concrete is provided on a support of a steel frame or a steel reinforced concrete, and asphalt pavement is performed on the road surface foundation. The foundation, asphalt pavement, and the like do not have a structure that absorbs vibration generated from a traveling vehicle.

[0008] Considering a vehicle traveling on a viaduct, a load is applied to the elevated structure due to the weight of the vehicle itself. However, since the vehicle is running, the load applied to the elevated structure constantly changes and fluctuates.
This causes the elevated structure to vibrate and generate a structure sound. Similar vibration is also caused by a vehicle or the like that gets over a step on a road surface.

The present invention lays a material in which aggregate and small pieces or powdery rubber are combined with polyurethane on a foundation road surface on a viaduct, thereby reducing noise caused by vibration of a structure caused by running of a vehicle. It was done.

[0010] The aggregate used here is pebbles,
Sand, metal chips, fiber chips, etc., are included to ensure the strength and wear resistance of the finished pavement material.
The small pieces or powdery rubber imparts elasticity to the pavement material, and those obtained by pulverizing waste tires or the like can be used as they are. These materials are bonded by polyurethane, and constitute a binder for both.

That is, the above-mentioned pavement material is a material in which stone and sand ensure the strength and wear resistance of the completed pavement, and rubber imparts elasticity to the pavement material. Thus, the vibration caused by the running of the vehicle can be reduced, and the generation of the structure noise can be suppressed.

[0012] The pavement material laid on the base surface of the viaduct may form the road surface itself, but may be used as a material for shutting off between the traveling vehicle and the elevated structure. Asphalt pavement may be performed on this paving material, or conversely, a pavement material may be laid on the asphalt pavement.

[0013]

The present invention will be further described below with reference to examples. The pavement used according to the invention was obtained as follows. That is, 25% of pebbles having a particle size of about 2 mm, 25% of sand,
Rubber pieces 20% of approximately 1.5 mm or less, polyurethane 30
% And other hardening materials (each weight%) were kneaded to obtain a pavement material.

(Example 1) As shown in FIG. 1, the paving material 3 was laid on a viaduct road surface foundation consisting of a reinforced concrete 2 struck on a pillar 1, and this was used as a road structure as it was.

(Embodiment 2) As shown in FIG. 2, an asphalt pavement material 4 is laid on an elevated road surface foundation consisting of a reinforced concrete 2 struck on a column 1, and the pavement material 3 is further laid thereon. And a road structure consisting of two layers was constructed.

(Embodiment 3) As shown in FIG. 3, the paving material 3 is laid on an elevated road surface foundation composed of a reinforced concrete 2 struck on a column 1, and an asphalt paving material 4 is further placed thereon. And a road structure consisting of two layers was constructed. In this case, the structure between the asphalt pavement material 4 and the viaduct 1 is blocked by the pavement material 3.

[0017]

As described above, the present invention uses a special pavement material on a road surface foundation on a viaduct, so that the generation of noise from a structure accompanying the traveling of a vehicle can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a road structure according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of the road structure according to the present invention.

FIG. 3 is a sectional view showing a third embodiment of the road structure according to the present invention.

[Explanation of symbols]

 1) pillars forming viaducts; 2) reinforced concrete forming road surfaces; 3) the pavement material of the present invention; 4) asphalt pavement materials.

Claims (2)

[Claims] 1. A road structure in which noise caused by vibration of a structure is reduced, wherein a pavement material in which aggregate and small pieces or a powdery rubber are bonded with polyurethane is laid on a foundation road surface on a viaduct. 2. A method of laying a pavement material in which aggregate and small pieces or powdery rubber are combined with polyurethane on a foundation road surface on a viaduct to block a running vehicle from a structure constituting the viaduct. Road structure with reduced noise caused by vibration.