JPH0835202A - Irregular road construction method for test course - Google Patents

Abstract

PURPOSE:To make it possible to construct a test course with ease and with accuracy by erecting two rod-like form materials, whose height is indefinite substantially in parallel and filling up a pavement material between the frame materials and scraping and removing the portions of a ground which exceed the height of the frame materials of the pavement material with an equalizing means. CONSTITUTION:The surface of a sub-layer is smoothly prepared to some extent, thereby producing a rough-graded ground surface. A bonding agent 3 is applied to the bottom of rod joints 2 where a release paper 4 is pasted on the coated surfaces. Then, the rod joints 2 are bonded with the ground surfaces on both sides. A form member 1 is then loaded thereon. A pavement material 5 is filled up between them. Then, an equalizing means is adapted to move along the form member 1, thereby eliminating scrapingly the portion of the pavement material which exceeds the height of the form member 1. Since it is possible to grasp the level of uneven road surface by way of a numerical value, positive data is available in various kinds of tests.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an irregular road construction method for a test course.

[0002]

2. Description of the Related Art A test course is a test route for testing the performance of automobiles, tires, etc., and there are various types. For example, road surfaces with various smoothness to check brake performance and tire friction force, slopes to check the center of gravity and inclination of automobiles, irregular roads for testing tire cushioning properties and shock absorbers (irregularities). Road) etc.

[0003] An irregular road is constructed by imitating an uneven road surface formed by subsidence or abrasion of a paved road or a ground road. Among them, it is the most difficult to construct (pave) a road surface having the same unevenness. It is a thing. For example, even if you try to research and experiment on an actual paved road with unevenness, you cannot naturally do it there. Therefore, a test course having the same degree of unevenness will be constructed, and various experiments will be conducted there.

As described above, when trying to reveal a specific unevenness, conventionally, a photograph is taken, a distance or a height is measured, or a mold is plastered, and the test course is performed based on the data. In this case, a person has done this by raising cement or the like in places on a smooth road surface, or by cutting a paved road to various depths with a cutting machine.

[0005]

However, this conventional human-made heaping method is very troublesome and requires a skilled worker. Also, since human beings excite appropriately, we could not expect accurate things. In addition, the cutting method naturally requires a large amount of work, and it is impossible to precisely cut the pavement. Therefore, fine adjustment may be required again.

In reality, it is impossible to construct a test course having a desired degree of unevenness. Therefore, there has been a long-felt need in the industry for a method capable of easily constructing an irregular road having a predetermined unevenness.

[0007]

[Means for Solving the Problems] In view of such a current situation,
The present inventor has completed the method for constructing an irregular road of the present invention as a result of earnest research, and the feature thereof is that the road surface is
Laying two rod-shaped members whose heights are not constant almost in parallel,
A pavement material is filled between the mold members, and then a portion of the pavement material which is higher than the height of the mold member is scraped off by a leveling tool to cure the pavement material.

Here, the road surface is an ordinary ground surface,
The background is usually adjusted. The background adjustment mentioned here means that it is smoothed to some extent, although any method may be used.

The mold member is a frame material for hardening a fluid such as cement to a predetermined shape when the fluid is hardened. Therefore, it is removed after curing. But,
Since it is a test course here, the mold member does not necessarily have to be removed. The rod-like shape simply means that it is elongated. The size is basically free. The cross section is generally rectangular, and the bottom surface and one side surface are preferably flat. However, it may be a triangle or an inverted trapezoid. If an inverted trapezoid is used, the paved road will have a trapezoidal shape and the corners will not be easily chipped.
Further, the metal type may be a channel, an angle, or a box type. The same applies to wooden ones.

The height of the die member is the basis of the present invention, and it is the degree of irregularity of the irregular road, in other words, the degree of unevenness. When a general bumpy road is duplicated, it can be measured and the curve according to the degree of deformation can be used as the height. In the present invention, it is very easy to reproduce the actual road surface measured in this way, and an unrealistic road surface different from the actual one can be easily formed. The manufacturing method may be appropriately cut by humans, but from the measured data on the road surface, a device called a Fourier transform machine is used to analyze the data and determine the cycle and amplitude of that data, and in particular the cycle of the unevenness to be manufactured. , The amplitude may be selected and the material of the mold member may be cut accordingly. According to this method, it is possible to easily calculate, cut, and manufacture a road surface or the like having finer irregularities (having a high frequency). Of course, a person may appropriately determine the height, or a large unevenness may be created for experiments instead of copying.

The mold members may have the same height in the direction perpendicular to the longitudinal direction (the left and right mold members have exactly the same shape and are aligned and placed), or may have different heights. . When the heights are different, the positions of the left and right mold members may be shifted or different mold members may be used. This can also be designed by calculation.

When the left and right heights are constant, the road is different from the actual road, but when a car passes, the unevenness in the longitudinal direction only has to be a problem, so there is no problem as a test course. Therefore, the height is usually about 5 to 50 mm.

Further, the bonding width (width of the bottom surface) is required to such an extent that the mold member does not tip over or bend due to the pressure of the paving material.
Of course, depending on the filling thickness, about 20 to 50 mm was suitable. If it is thin, a brace may be fixed to prevent it from falling.

The material of the mold member is preferably made of plastic, of which polyolefin foam is most preferable. For example, it seems that a foam having a low foaming ratio of about 5 times that of polyethylene is optimal. This is because it is cheap, lightweight, and easy to manufacture and process. Of course, metal or wood may be used.

This mold member is usually adhered so as to stand on the road surface. In this method, an adhesive is linearly applied to the road surface, and a mold member is placed on the adhesive. However, since it is difficult to apply linearly in this method, it is easy to apply an adhesive to the bottom surface of the mold member and attach a release paper on it. Further, when it is still difficult to place it in a straight line, for example, when the mold member is very long and does not have the hardness of a plate, etc., a linear so-called elastic adhesive on both front and back surfaces ( A method of adhering a rod joint to which a pressure-sensitive adhesive) is applied to a road surface and placing a mold member thereon is simple.

The first feature of the present invention is that an irregular path can be easily constructed. This is done by using a plastic foam which is easy to process and can be easily cut on site, and is bonded in a straight line. Is significantly increased by using stick joints coated with adhesive on both front and back sides separately.

The mold members are placed on the left and right sides, and the paving material is filled between them. In this case, the left and right mold members are usually molded in the same shape and placed so as to have the same shape. Therefore, the direction perpendicular to the longitudinal direction is horizontal. The left and right mounting intervals may be about 50 to 100 cm, and may be determined by the width of the tire of the automobile or other object to be tested. In the case of a four-wheeled vehicle, the width may be increased, or two rows may be separately constructed for tires on both sides. The construction length is determined by what is tested, but it is usually about 100 to 300 m.

The pavement material may be any as long as it hardens and can withstand the passage of automobiles. However, it is usually a mixture of cement with aggregate, a mixture of mastic asphalt mixture with aggregate, or a mixture of resin with aggregate. As the resin, acrylic resins such as MMA, epoxy resins and the like are suitable. As the aggregate for resin, there are pebbles, glass beads, plastic beads and the like. These sizes are limited by the height of the mold member, and are usually about 1 to 5 mm. Further, a pigment or the like may be added for identifying by color. Further, there is no problem even if the additives are added so that they are usually mixed.

The leveling tool is simply a straight-line tool and is used to make the paving material, which is piled up above the height of the mold member, at the same height as the mold member. This need only be moved along the mold member. Therefore, it may be a simple plate. Also,
When the pavement material is automatically machine-filled, it may be provided at the rear part of the moving machine. The term "equal to or more than the height of the mold member" as used herein means that it is above a line connecting the mold members on both sides with a straight line, and it does not matter whether the line is a horizontal line.

After the leveling tool is leveled in this way, the paving material is cured, and the process is completed. However, in order to change the friction coefficient of the surface of the irregular road thus formed, small unevenness may be provided on the surface before curing. Moreover, you may perform other surface treatments after hardening.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is a perspective view showing an example of a mold member 1 used in the present invention. In this example, no adhesive is applied to the bottom surface. FIG. 2 is a perspective view showing an example of the rod joint 2 used in the example of the present invention, and the adhesive 3 is applied to both front and back surfaces.
Is applied, and the release paper 4 is attached to both surfaces thereof.

FIG. 3 (a) is a perspective view showing the stick joints 2 of FIG. 2 bonded to the road surface at predetermined intervals. This figure is a schematic view of the figure as seen from above the side surface. In this figure, the release paper on the back side has already been removed, and the release paper on the top surface has been removed by adhering it to the road surface. FIG. 3B shows the die member 1 bonded on the rod joint 2.

FIG. 3 (c) shows the pavement material 5 filled in the gap portion of FIG. 3 (b). This completes when the paving material 5 is cured. The mold member 1 and the rod joint 2 may or may not be removed.

[0024]

As described above, the construction method of the present invention has the following great advantages. It is very easy to make irregular roads. Since the mold member is simply placed on the road surface, the construction period is short and it is easy to rework and change the position on site. Furthermore, a large-scale device is not required and it can be easily constructed anywhere. It is easy to restore the actual road just by molding the mold members. You can easily create irregular road surfaces that do not actually exist. Since the degree of unevenness of the road surface (flatness of the road) can be grasped numerically, reliable data can be obtained in various tests.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a mold member used in the method of the present invention.

FIG. 2 is a perspective view of a bar joint used in an example of the present invention.

FIG. 3 is a perspective view showing a work process of the present invention.

[Explanation of symbols]

 1 type member 2 bar joint 3 adhesive 4 release paper 5 paving material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ito 740 Makabe Katsuta-cho, Katsuta-gun, Okayama Prefecture Sumitomo Rubber Industries, Ltd. (72) Inventor Makio Mizokawa 2-31 Tenma, Kita-ku, Osaka Matsumura Gumi (72) Inventor Akira Kobayashi 2-31 Tenma, Kita-ku, Osaka Matsumura Gumi Co., Ltd. (72) Inventor Shoichiro Suzaki 1-6-5 Shimbashi, Minato-ku, Tokyo Japan Road Co., Ltd. (72) Inventor Yoshihisa Kataoka 1-2-12 Minamishinmachi, Chuo-ku, Osaka City Japan Road Co., Ltd. Kansai Branch (72) Kenro Aoki 1-2-12 Minamishinmachi, Chuo-ku, Osaka City Japan Road Kansai Co., Ltd. Within the branch

Claims (1)

[Claims] 1. A rod-shaped die member having a non-uniform height is laid on the road surface substantially in parallel, and a paving material is filled between the die members.
Next, a method for constructing an irregular road for a test course, characterized in that a portion of the paving material having a height higher than a height of the mold member is scraped off with a leveling tool to cure the paving material.