JPS60159204A - Pavement structure - 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 [Technical Field of the Invention] The present invention relates to a pavement structure, and more particularly to a pavement structure for a road surface, such as a bridge, which is subject to large deflection under load such as when a vehicle is running.

[Conventional technology]

According to the results of research conducted by the inventors of the present invention, an important point in the construction of the above-mentioned pavement structure is that +11 rutting is difficult to occur on the surface.

(2) It has excellent followability against deflection and is less prone to cracking.

(3) A smooth and continuous paved surface that follows the curvature and slope of the surface to be paved can be easily obtained.

(4) A paved surface with excellent wear resistance and high slip resistance can be obtained.

(5) The thickness of the pavement can be reduced, and the weight per unit area can be reduced.

(6) Easy construction, especially the surface layer can be produced in a factory.

It is.

However, the current situation is that a conventional pavement structure that satisfies each of the above points has not yet been developed.

[Purpose of the invention]

Therefore, an object of the present invention is to provide an excellent pavement structure that can satisfy all the important points of the above-mentioned pavement structure.

[Structure of the invention]

That is, the present invention includes a base layer laid on the surface of a steel deck plate,
It consists of a surface layer placed on the surface of this base layer via an adhesive layer, and this surface layer is molded from a flexible polymer material, and at least the upper layer has a wear-resistant part flat on the surface. Its gist is a pavement structure characterized by being buried so that it is exposed on the surface of the layer.

[Embodiments of the invention]

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

FIG. 1 is a partially cutaway perspective explanatory diagram showing a pavement structure according to an embodiment of the present invention, and FIG.
Figure 3 is an enlarged explanatory view of the cross section taken along the line A-A in the second embodiment, Figure 4 is an enlarged explanatory view of the cross section taken along the arrow A-A in Figure 1 in the third embodiment. FIG. 3 is an enlarged cross-sectional explanatory diagram.

In the figure, E indicates a pavement structure according to an embodiment of the present invention, which includes a base layer 20 laid on the surface 10a of the pressure regulating plate 10, and a surface [40] disposed on the surface 20a of the base layer 20 with an adhesive layer 30 interposed therebetween. The surface layer 40 is formed of a flexible polymer material, and at least the upper layer 41 thereof is made of a flexible polymer material.
The upper part 42u of the wear-resistant member 42 is the surface 40 of the surface layer 40.
It is constructed by burying it so that it is exposed at a.

To further explain this structure, the pressure regulating plate 10 constitutes the base of pavement applied to bridges such as road bridges and viaducts, and in this embodiment, after removing rust by blasting etc. A steel plate with anti-rust coating is used.

Further, the base layer 2 laid on the surface 10a of this pressure regulating plate 10
0 mainly performs unevenness correction of about 5H due to irregularities scattered on the surface 10a of the pressure regulating plate 10, that is, the surface to be paved, such as build-up of welded parts, traces of cutting and removal of hanging pieces, etc.
After being laid on the pressure regulating plate 10 to a thickness of about 51 to 40 mm, it is hardened.

The base Ji20 is made of materials such as bituminous, bituminous rubber, resin such as epoxy resin and urethane resin, bituminous resin, and rubber, and in addition to these materials, bones such as ceramic powder, silica sand, and slag are added. By mixing materials, fibers, and anti-corrosion materials, or embedding various waterproof sheets such as non-woven fabric, paper cloth, mesh sheets, mesh sheets, etc. in the base layer 20, it is possible to make it easier to pave to a uniform thickness, and to improve waterproofness. It is better to prevent rutting (flow deformation) due to wheel loads. In particular, when the base layer 20 is mainly made of bitumen or bituminous rubber, a material with a high aggregate ratio such as asphalt concrete is used, or when booth asphalt is used, a honeycomb-shaped wire mesh, etc. Burying can further prevent rutting (flow deformation) caused by wheel loads.

Note that the base layer 20 described above can be omitted if the adhesive layer 30 can prevent corrosion or correct unevenness of the pressure regulating plate 10.

The adhesive layer 30 may be made of a resin-based adhesive such as an epoxy resin or a urethane resin, a liquid adhesive such as a rubber-based adhesive, a bitumen-based adhesive, a bituminous rubber-based adhesive, a bituminous resin-based adhesive, a hot melt rubber, a naturally vulcanized rubber, or the like. A rubber material is used.

In this example, the adhesive 1if30 uses a two-component mixed room temperature curing high modulus epoxy adhesive that has elasticity and is excellent in stretchability and cent resistance.
Fins to 5 dragons are preferred.

The surface layer 4o, which is laid on the surface 20a of the base layer 2° via this adhesive layer 30, is formed of a flexible polymeric material as described above, and the upper layer 41
The wear-resistant member 42 is embedded so that the upper portion 42U is exposed on the surface 40a of the surface layer 40.

Therefore, the paved surface is covered by the wear-resistant member 42.
In addition to improving abrasion resistance, it is possible to make a rough surface and obtain a pavement surface with high gouge resistance, and furthermore,
The wear-resistant member 42
can be strengthened, and the occurrence of ruts on the surface 40a of the surface layer 40 can be reliably prevented.

The surface layer 40 is mainly made of a flexible polymeric material such as rubber or plastic and is molded in a factory. Since the surface layer 4o is formed of a flexible polymeric material in this way, it can be easily joined along the curvature or slope of the pressure regulating plate 10 or the base layer 2° laid on its surface. In addition to being able to obtain a smooth paved surface, it has excellent ability to follow the deflection of the steel deck plate due to vehicle running, etc., and can prevent the occurrence of cracks.
This surface layer can be easily manufactured in a factory.

Note that the medium dimension of this surface layer 40 has a limit depending on the capacity of the production equipment, but the length dimension can be continuously formed into a long length, and in this example, the length is the same as the length of the expansion joint on the bottom surface. It is molded.

Further, as described above, the wear-resistant member 42 embedded in the upper layer portion 41 of the surface layer 40 such that its upper portion 42u is exposed on the surface 40a of the surface layer 40 is shown in FIG. 2 in the first embodiment. As shown in the figure, it is composed of a large number of metal needles.

In this embodiment, the wear-resistant member 42 consisting of a large number of metal needles has a reinforcing layer 43 embedded therein as shown in the figure, and is mainly made of a flexible polymeric material such as rubber or plastic. Wear-resistant members 42 made of a large number of implanted metal needles are implanted on the upper surface of the lower layer 44 at required intervals to a height of several meters to 201 meters. The space between them is filled with an upper layer material 41a so as to be buried except for its upper end.

In this embodiment, the upper layer material 41a is made of a two-component mixture of epoxy resin and urethane resin, which has elasticity and cures at room temperature, or a ceramic powder in addition to these resin materials.

Abrasion-resistant aggregates such as silica sand and slabs, short fibers such as steel fibers, synthetic fibers, and glass fibers (cut fibers)
A material containing these alone or in combination is used.

The filling of the above-mentioned upper layer material 41a into the space of each metal needle-shaped wear-resistant member 42 is carried out by placing a wear-resistant member consisting of a large number of metal needles on the upper surface of the lower layer portion 44 constituting the main surface layer 40. After planting 42, it is carried out at the factory.

Note that the metal needle-shaped wear-resistant member 42 described above has a surface layer 4.
In order to increase the adhesive force with the flexible polymer material which is the main material of the 0, it is preferable to perform a surface treatment before implantation.

Furthermore, the wear-resistant member 4 made up of a large number of metal needles described above
When the space between 2 is filled with the upper layer material 41a mixed with the wear-resistant aggregate and short fibers, the pavement surface will have macroscopic irregularities caused by the wear-resistant member 42 and aggregates and short fibers. The surface 41a of the surface layer 4o can have a rough surface mixed with microscopic irregularities, which can further improve wear resistance and slip resistance.
It is possible to reliably prevent ruts from occurring in the area 0a.

Next, regarding the second embodiment of the wear-resistant member 42 described above,
Briefly explained with reference to FIG. 3, the wear-resistant member 42 in this embodiment is composed of a large number of spikes.

The wear-resistant member 42 made of spikes is made of a wear-resistant material such as metal, plastic, or ceramic, and is molded into a short right cylindrical shape with a disc-shaped locking part at the bottom, as shown in the figure. ing.

The wear-resistant members 42 made of spikes are also planted on the upper surface of the lower layer 44 at required intervals, as in the first embodiment described above.
The space between them is filled with an upper layer material 41a so as to be buried except for its upper end.

Furthermore, the third embodiment of the above-mentioned wear-resistant member 42 will be briefly described with reference to FIG. 4. The wear-resistant member 42 in this embodiment is composed of a large number of flat objects.

The wear-resistant member 42 made of a flat object is made of ceramic or metal lined with ceramic.

Using wear-resistant materials such as steel fiber reinforced concrete, FRP, and plastic, we can create plaid, flat cylindrical,
Molded into honeycomb, net, or woven shapes.

The wear-resistant member 42 made of a flat material is also implanted on the upper surface of the lower layer 44 at a required interval, as in the first embodiment described above, and the implanted wear-resistant member 42
The upper layer material 41a may be filled into the space between the layers so that the upper end portion thereof is buried, or alternatively, as shown in FIG. 41a, with its upper end left intact.

In particular, as shown in FIGS. 2 to 4, the wear-resistant member 42, which has a higher elastic modulus than the two-layer material 4La, is placed so that its upper end surface is flush with the surface 40a of the surface layer 40. If it is buried, when the wheel load acts on the surface layer 400 surface 40a as a uniformly distributed compressive force while the vehicle is running, the surface layer 40
Since the deformation of the wear-resistant member 42 is smaller than the deformation of the upper layer material ILa of the surface 40a, the upper part 40u of the wear-resistant member 42 apparently protrudes from the surface 40a of the surface layer 40,
High slip resistance can be obtained.

In addition, when forming the surface layer 40, if the length is formed to be the same as the interval between expansion joints of the bridge, the joints of the butt portions of the surface layer 40 that cross the vehicle traveling direction can be formed on the bridge surface. It is possible to significantly improve the running performance and riding comfort of the vehicle. Furthermore, if the above-mentioned upper layer material 41a is rubbed into the joints created by the middle butt portions of the surface layer 40 after construction, a paved surface without joints can be obtained, improving the running performance of the vehicle and the riding comfort. can be further improved.

In this embodiment, the reinforcing layer 43 embedded inside the surface layer 40 has one or more layers of reinforcing material having excellent tensile strength, such as steel cord or steel fabric. It is strongly molded integrally with the flexible polymer material that is the main material. Therefore, the load caused by vehicle running etc. can be dispersed, and the surface 40a of the surface layer 40 can be
It is possible to reliably prevent the formation of ruts on the surface, while also controlling thermal expansion and contraction of the surface layer due to temperature changes.The above-mentioned reinforcing layer may be used alone, and synthetic fiber cords or It may be used in combination with synthetic fiber fabric.

Further, a large number of surface grooves (not shown) may be arranged on the surface 40a of the two continuous surface layers 40 in the long plane direction, that is, parallel to the horizontal axis, and in the middle direction, that is, perpendicular to the bridge axis.

This longitudinal surface groove has a width of 31 to 10 mm in the groove, ensuring the necessary slip resistance for vehicle running, reducing noise and also taking into account wear.

Seedling pitch: 10++s~20n, R depth: 5m+
It is preferable to set the width between + and 15cm, and the surface grooves in the middle direction should be several tens of centimeters in length so that each of the two longitudinal grooves communicates with each other, mainly in consideration of securing the drainage effect.
It is preferable to arrange it in a pinch of several meters.

Further, back surface grooves (not shown) are formed at required intervals on the back surface of the surface layer 40, that is, on the base layer 20 side.
If the surface J-40 is arranged in the middle direction of 0, that is, perpendicular to the horizontal axis, when bonding the surface J-40 to the surface 20a of the base layer 20 via the adhesive layer 30, the adhesive constituting the adhesive layer 30 will be It is filled in each back groove, and can increase the contact area between the adhesive Ff 30 and the surface layer 40, and can significantly improve the adhesive force of the surface layer 40 to the base layer 20.

This back groove is formed by, for example, a net-like seal l-
Of course, it is also possible to integrally embed them to form an uneven portion on the back surface.

〔Effect of the invention〕

As described above, the present invention consists of a base layer laid on the surface of the pressure regulating plate and a surface layer placed on the surface of the base layer via an adhesive layer, and this surface layer is made of a flexible polymer material. Since the wear-resistant member is embedded in at least the upper layer of the molded member so that the upper part thereof is exposed on the surface of the surface layer, the following effects can be achieved. (1) As mentioned above, since the surface layer is formed from a flexible polymer + material A, it can be easily joined along the curvature or slope of the pressure regulating plate or the base layer laid on its surface. It is possible to obtain a smooth paved surface, it has excellent followability to the deflection of the pressure regulating plate due to vehicle running, etc., it can prevent the occurrence of cracks, and furthermore, this surface layer can be easily produced in a factory. I can do it.

(2) Furthermore, since the wear-resistant member was buried in the surface layer so that its upper part was exposed on the surface of the surface layer, the pavement surface can improve FJ wear resistance with the above-mentioned wear-resistant member, and the surface roughness can be improved. It is possible to obtain a paved surface with high slip resistance, and the surface of the surface layer can be strengthened by a wear-resistant material, which reliably prevents the formation of ruts on the surface of the surface layer. can do.

(3) Furthermore, as mentioned above, this pavement structure is composed of a base layer laid on the surface of the steel deck plate and a surface layer placed on the surface of this base layer via an adhesive layer, so the pavement surface is uniform. The surface condition of the pavement can be improved, and the running performance and riding comfort of the vehicle can be greatly improved. On the other hand, the thickness of the pavement can be made thinner, and the weight per unit area can be reduced.
Furthermore, construction can be greatly facilitated.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective explanatory diagram showing a pavement structure according to an embodiment of the present invention, and FIG.
Figure 3 is an enlarged explanatory view of the cross section taken along the line A-A in the second embodiment, Figure 4 is an enlarged explanatory view of the cross section taken along the arrow A-A in Figure 1 in the third embodiment. FIG. 3 is an enlarged cross-sectional explanatory diagram. 10...Steel deck plate, 10a...Steel deck plate surface, 20.
... Base layer, 20a... Surface of base layer, 30... Adhesive layer, 40... Surface layer, 40a... Surface of surface layer,
41... Upper layer of surface layer, 42... Wear-resistant member 4
2u... Upper part of the wear-resistant member. Agent: Patent Attorney Shin Ogawa − Patent Attorney Ken Noguchi Teru Patent Attorney Kazuhiko Saishita Figure 1 ξ Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] It consists of a base layer laid on the surface of the steel deck plate, and a surface layer placed on the surface of the base layer via an adhesive layer. , a pavement structure characterized by having a wear-resistant member buried so that the upper part thereof is exposed on the surface of the surface layer.