JPS61106809A - Surface structure in steel floor panel paved road surface - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the improvement of the surface structure of a steel deck pavement, and is applied to bridges such as road bridges and viaducts.

[Conventional technology]

According to the results of repeated experiments and studies by the inventor of the present invention, the important points of the surface structure of the above-mentioned steel deck paved road surface are as follows. That is, (al) Ability to increase slip resistance when the road surface is wet.

(b) Even if the road surface is worn out, as long as grooves with a predetermined groove depth or more remain, the slip resistance of the road surface will hardly change.

(C) It should be able to follow the deformation of the road surface while the vehicle is running, and reliably prevent damage to the surface layer.

(d) The length of the drainage path to the road shoulder due to the grooves provided in the surface layer is short, improving the drainage performance of the road surface and greatly preventing the occurrence of hydroplaning.

However, with the surface structure of conventional steel deck pavement,
At present, nothing that satisfies each of the above points has yet been developed.

For example, the one described in Japanese Patent Application Laid-Open No. 50-88829,
There are drawbacks such as insufficient slip resistance and tires slipping especially when the road surface is wet.
- In the case of the one described in Publication No. 37203, due to the difference in abrasion resistance between the small resin opening and the asphalt, not only does the slip resistance change due to road abrasion, but also when the road surface deforms due to the difference in steel properties, the cloak body and asphalt There are still many problems, such as peeling at the interface and loss of the mantle body.

[Purpose of the invention]

Therefore, an object of the present invention is to provide an excellent surface structure for a steel deck paved road surface that can satisfy all of the important points of the surface structure for a steel deck paved road surface mentioned above.

[Structure of the invention]

That is, the present invention provides a base layer laid on the surface of a steel deck;
In a steel deck pavement road surface consisting of a surface layer disposed on the surface of the base layer via an adhesive layer, the surface layer is mainly formed of a flexible polymeric material, and the surface of the surface layer is ″ The value of groove length/road surface area is 1/
10,100 (t') or more, and the angle θ between the groove and the vehicle running direction is 30° or more when viewed from the acute angle side. The gist of this study is the surface structure of paved roads.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

Fig. 1 is a partially cutaway explanatory perspective view showing the overall structure of a steel deck pavement road surface to which a surface layer according to an embodiment of the present invention is applied, and Fig. 2 shows the main part of the same, that is, the grooves provided in the surface layer. FIG. 3 is an enlarged explanatory plan view showing the pattern, and FIG. 3 is an enlarged explanatory cross-sectional view taken along the line A-A in FIG.

In the figure, the overall structure of the steel deck pavement surface G is steel deck 1
0, and a surface layer 40 disposed on the surface of the base layer 20 with an adhesive layer 30 interposed therebetween.

In the present invention, in particular, the surface layer 40 is mainly formed of a flexible polymer material such as rubber or plastic, and the value of groove length/road surface area is 1 on the surface of the surface layer 40. /10100(') or more, and the angle θ formed by each 'a41 with the vehicle running direction is 30° or more when viewed from the acute angle side.

To explain further, in this embodiment, the above-mentioned surface layer 4
The number 141 provided on the surface of 00 is set at an angle θ of 60° with respect to the running direction of the vehicle, and is provided in a grid pattern with 50 crane pitches. The ratio of the grooves 41 to the surface of the surface layer 40 is 1/25 (
xi/m').

In addition, in this embodiment, the upper layer portion 4 of the surface layer 40 described above
As shown in FIG. 3, short fibers 43 having abrasion resistance are mixed in the fibers 2.

This surface layer 40 can also be molded in a factory using a flexible polymeric material such as rubber or plastic.
The short fibers 43 mixed in the upper layer 42 include short fibers (cut fibers) such as steel fibers, synthetic fibers, and glass fibers, and aggregates such as ceramic powder, silica sand, and slag, either alone or in combination. .

Therefore, the paved surface is covered with the short fibers 43 having wear resistance.
It is possible to obtain a rough surface with a mixture of microscopic irregularities due to the grooves 41 and macroscopic irregularities due to the large number of grooves 41 described above, and it is possible to obtain a paved surface with excellent wear resistance and high slip resistance.

In addition, in the present invention, the macroscopic unevenness created by the grooves 41 can significantly increase the slip resistance, so unlike the embodiment, there is no microscopic unevenness (although the slip resistance is sufficient for practical use) without mixing short fibers. It is also possible to obtain sex.

[Experiment Example 1] One of the characteristic values that indicates the slip resistance of a road surface is the slip resistance value (B P N) of the road surface measured by the British Votaple Ski 7 Dres resistance tester, and the BPN when the road surface is wet is 55 or more. It is known that it is possible to ensure practically sufficient slip resistance.

FIG. 4 shows the results of testing the relationship between the angle θ between the groove 41 and the vehicle running direction and the wet BPN ratio.

The specifications of the surface layer 40 used in this experiment are as follows.

- Marked ○ in the material diagram for the upper surface layer... Marked △ in the diagram containing rubber mixed with cut wire...
Silica sand-containing plastic・Groove length/road surface area value 1/10 to 1/30 (Ryu-1)・Groove width・・・・・・・・・・・・5 to 15 1・Groove pitch... ...20 to 30 m1 Groove pattern...parallel arrangement As is clear from FIG. Approach the direction perpendicular to the direction of travel (
As time progressed, the BPN ratio increased in a quadratic manner.

In addition, in this experimental example, when a cut wire is mixed as short fibers 43 in the upper layer 42 of the surface layer 40 (○ in the figure)
mark), the tire is in the direction perpendicular to the groove 41" (
, Z7'r4 VT 0) B P NU; t, i41
The height is about twice as high as when sliding in the 〒 direction.

Furthermore, it was observed that as the groove length per unit surface area increased, the BPN also tended to increase.

[Experiment example 2] The specifications of the surface layer 40 used in this experiment are as follows.

・Material of upper surface layer...Rubber mixed with cut wire ・Groove length/road surface area value...1/10100 (' )
・Groove width・・・・・・・・・20mm・Groove, chi・
...1001 m -Groove pattern...parallel arrangement In this Experimental Example 2, the angle θ of the groove 41 with the vehicle running direction when the specifications of the surface layer 40 are as described above, and the wet condition As a result of testing the relationship between the BPN ratios, we obtained experimental results equivalent to those obtained in Experimental Example 1 described above and indicated by O in FIG. 4, and the angle θ between the groove 41 and the vehicle running direction was The BPN when the road surface was wet at 30° and 30° was 50 and 55, respectively.

From the results of the above-mentioned experiments, if the grooves 41 whose angle with the vehicle running direction is 30 degrees or more are arranged so that the value of groove length/surface area is 1/10100 (') or more,
It can be seen that it is possible to secure a BPN of 55 or more on a wet road surface.

In addition, if short fibers are not mixed and there are no microscopic irregularities,
The value of groove length/surface area when θ=90゛ is 115 (m
m-') or more is preferable.

〔Effect of the invention〕

As described above, the present invention provides a steel deck pavement road surface consisting of a base layer laid on the surface of a steel deck and a surface layer placed on the surface of the base layer via an adhesive layer, the surface layer comprising:
The surface layer is mainly formed of a flexible polymer material, and the groove length/road surface area value is 1/10100.
(a') or more, and the angle θ between the valley groove and the vehicle running direction is 30° when viewed from the acute angle side.
The following effects can be achieved by ensuring that the temperature is at least 5°. In other words, (al) The surface layer is mainly formed of a flexible polymer material, and even if the upper surface of the surface layer wears out due to long-term use, grooves with a predetermined groove depth or more will remain. For example, the slip resistance of the road surface hardly changes.

(b) In addition, since the surface layer is mainly formed from a flexible polymer material, the road surface deforms uniformly even when used on steel deck pavements, which undergo relatively large deformations due to wheel loads during vehicle running. can follow. Therefore, conventional road surfaces that ensure slip resistance by combining different materials (Japanese Patent Laid-Open No. 58-3720
As seen in Publication No. 3), there is no risk of damaging the surface layer.

(C) The value of groove length/road surface area is 1/100 (關-1
) and moreover, the angle θ between the valley groove and the direction of vehicle travel is 30° or more when viewed from the acute angle side, so the distance of the drainage path to the road shoulder is short. This allows rainwater etc. to be quickly guided to the drainage ditch through the groove, greatly improving the drainage performance of the road surface. Therefore, the thickness of the water film on the road surface can be reduced, and the possibility of hydroplaning occurring when driving at high speed in the rain can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway explanatory perspective view showing the overall structure of a steel deck pavement road surface to which a surface layer according to an embodiment of the present invention is applied, and Fig. 2 shows the main part of the same, that is, the grooves provided in the surface layer. FIG. 3 is an enlarged plan view showing the pattern, FIG. 3 is an enlarged cross-sectional view taken along the line A-A in FIG. 1, and FIG. It is a figure showing a relationship. DESCRIPTION OF SYMBOLS 10... Steel deck slab, 20... Base layer, 30... Adhesive layer, 40... Surface layer, 41... Groove, θ... Angle formed by the groove with the vehicle running direction.

Claims (1)

[Claims] In a steel deck pavement road surface consisting of a base layer laid on the surface of the steel deck and a surface layer placed on the surface of this base layer via an adhesive layer, the surface layer is mainly made of a flexible polymer material. At the same time, grooves are provided on the surface of this surface layer so that the value of groove length/road surface area is 1/100 (mm^-^1) or more, and each groove is formed in the direction of vehicle travel. A surface structure of a paved road surface of a steel deck slab, characterized in that the angle θ formed by the angle θ is 30° or more when viewed from the acute angle side.