JPH1088673A - Expansion joint structure for prestressed concrete pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide expansion joint structure, in which the falling of a rubber gasket body to the lower section of a rail joint gap section is prevented effectively even when the tires of an aeroplane and a tow car are placed on the horizontal section of the rubber gasket body of the rail Joint gap section. SOLUTION: In the expansion joint structure, trapezoidal sectional engaging recessed sections 7 are formed to the side faces of holding fittings 13 while receiving sections 8 projected to the rail joint gap section X side are formed integrally to lower sections. A rubber gasket body 10 is installed to the rail joint gap section X of prestressed concrete pavement slabs 1a, 1b, and projecting engaging projections 11 engaged with the engaging recessed sections 7 are formed to side faces while support surfaces 12 abutted against the receiving sections 8 are formed to a base in the rubber gasket body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic joint structure for pavement of prestressed concrete used in airport aprons, runways, roads, etc., and more particularly, to a predetermined gap formed between prestressed concrete pavement slabs. The present invention relates to a telescopic joint structure for prestressed concrete pavement in which a wheel of an airplane or towing vehicle is effectively prevented from falling into a play area.

[0002]

2. Description of the Related Art Conventionally, an apron at an airport uses a pavement slab made of prestressed concrete having a high tensile strength, since a heavy-load aircraft repeatedly comes and goes.
In airport aprons, prestressed concrete paving slabs of a predetermined size are laid at predetermined intervals, and the gap between the prestressed concrete paving slabs absorbs the expansion and contraction of the pavement slabs and allows rainwater to flow. The rubber gasket is fitted so as not to get into the part.

[0003]

For example, as a conventional structure between prestressed concrete paving slabs, as shown in FIG. 2, prestressed concrete paving slabs 1a and 1b formed with a play portion X having a predetermined gap therebetween. The holding metal fittings 3 having the engaging recesses 2a, 2b formed on the side surfaces are fixed to the opposing upper end surfaces, respectively, and the engaging recesses 2a, 2b are formed on the side surfaces of the prestressed concrete paving slabs 1a, 1b. Engaging projections 4a, 4b that engage with
, And a rubber gasket main body 4 having a cavity 6 formed therein via a rib 5 is mounted therein.

However, the conventional support structure of the rubber gasket main body 4 as described above is such that the engagement recesses 2a and 2b formed on the side surface of the holding fitting 3 are provided with the convex engagement projections 4a and 4a of the rubber gasket main body 4. 4b, the rubber gasket main body 4 has a convex shape when a large load acts on the support surface 4c of the rubber gasket main body 4 of the play space X on the support surface 4c of the airplane or towing vehicle. In some cases, the engagement protrusions 4a, 4b having the shape of a circle are disengaged from the engagement recesses 2a, 2b of the holding fitting 3, and fall below the joint play space X.

[0005] The support surfaces 4c on both upper sides of the rubber gasket main body 4 are provided on the prestressed concrete pavement 1.
Since the rubber gasket main body 4 is formed horizontally so as to be flush with the surfaces a and 1b, the support surfaces 4c on both upper sides are opened when the rubber gasket main body 4 is contracted. Also, there is a problem that sand, pebbles, etc. enter.

The present invention has been devised in view of such a conventional problem. Even when a tire of an airplane or a towing vehicle rides on a horizontal portion of a gasket main body in a play space, the rubber gasket main body is connected to the joint play space. Can be effectively prevented from dropping below the part, and when the rubber gasket body is attached, a gap is prevented from forming between the upper side surface of both shoulders of the rubber gasket body and the prestressed concrete paving slab, and the rubber gasket body An object of the present invention is to provide a telescopic joint structure for prestressed concrete pavement that can effectively prevent rainwater, sand, pebbles, and the like from entering between a side surface and a holding bracket.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a prestressed concrete paving slab formed with a predetermined gap between play sections, and has a trapezoidal cross section on the side. While forming the engagement recess,
A holding fitting integrally provided with a receiving part projecting toward the play part side at a lower part is fixed, and a convex engagement protrusion which engages with the engagement recess on a side surface is provided at a play part of the prestressed concrete paving slab. And a rubber gasket body having a support surface formed on the bottom surface in contact with the receiving portion, and the rubber gasket body has a horizontal portion forming a horizontal plane with a prestressed concrete paving slab on both sides of an upper surface.
A V-shaped concave portion is formed on the upper surface at the center in the width direction toward the lower side of the play portion, the support surface is formed on both sides of the bottom surface, and a V-shaped portion is formed at the center portion toward the lower side of the play portion. -Shaped convex part is formed integrally, and inside the rubber gasket main body,
The gist is that a hollow portion is defined by a central vertical rib and a horizontal rib provided in the middle in the width direction.

In addition, the rubber gasket main body has a tapered side surface which is open outward before the rubber gasket main body is mounted on the holding bracket of the prestressed concrete paving slab. is there.
According to the present invention, the supporting surfaces provided on both sides of the bottom surface of the rubber gasket main body are supported by the receiving portions provided on the holding fitting, and the side surfaces are engaged with the engaging concave portions and the engaging protrusions. Even if the load of the airplane or towing vehicle tires is applied to the horizontal portion of the rubber gasket body in the play area, the gasket body is supported without falling below the joint play area, and both sides of the rubber gasket body After the tapered side surface formed on the upper side surface of the shoulder is attached to the holding bracket of the prestressed concrete paving slab, the tapered side surface of both shoulders is in close contact with the inner wall surface of the holding bracket, and the rubber gasket is used. Prevents the formation of a gap between the side of the main body and the holding bracket, effectively preventing rainwater, sand, pebbles, etc. from entering between the side of the rubber gasket and the holding bracket. One in which prevention can be.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 is a cross-sectional view showing an embodiment of the present invention, wherein 1a and 1b are prestressed concrete pavement plates formed with a play space X having a predetermined gap therebetween, and 13 is a relative surface of the prestressed concrete pavement plates 1a and 1b. A holding fitting attached to the upper end face of the holding fitting 13 is shown. An engaging recess 7 having a trapezoidal cross section is formed on an inner wall surface of the holding fitting 13, and a receiving part 8 projecting toward the play portion X is provided at a lower part. It is formed integrally.

[0010] The prestressed concrete paving slab 1
A rubber gasket main body 10 is mounted in the gap portion X between a and 1b. The gasket main body 10 has a convex engaging projection 11 that engages with the engaging concave portion 7 on a side surface, and the receiving hole on the bottom surface. A support surface 12 that contacts the part 8 is formed. The rubber gasket body 10 has a horizontal portion 14 connected to the prestressed concrete paving slabs 1a and 1b on the upper surfaces of both shoulders, and the rubber gasket body 10 has a prestressed concrete pavement on the upper side surfaces of both shoulders. Before the plates 1a and 1b are mounted on the holding bracket 13, a tapered side surface portion 14a which is open outward is formed as shown by a chain line.

The tapered side surface portion 14a is elastically deformed to become a vertical surface after being fitted to and mounted on the holding bracket 13 of the prestressed concrete paving slabs 1a and 1b, and closely adheres to the inner wall surface of the holding bracket 13. is there. Also, a V-shaped recess 15 is formed on the upper surface at the center in the width direction of the horizontal portion 14 toward the lower side of the play portion X, and the support surface 12 is formed on both sides of the bottom surface, A V-shaped convex portion 16 is integrally formed at the center toward the lower side of the play portion X.

In the rubber gasket main body 10, a hollow portion 19 is defined by a central vertical rib 17 and a horizontal rib 18 provided in the middle in the width direction. In the embodiment of the present invention, the holding surfaces 1 provided on both sides of the bottom surface of the rubber gasket main body 10 are configured as described above.
3 is supported by a receiving portion 8 provided on the side surface of the gasket main body 10 mounted on the play portion X. Even if a load acts on the tires of the vehicle, the rubber gasket main body 10 is supported by the receiving portion 8 and the engaging concave portion 7 provided on the holding bracket 13, so that the rubber gasket main body 10 falls below the joint play space portion X. It is supported without.

When the rubber gasket body 10 is contracted, that is, when the rubber gasket body 10 is fitted and mounted on the holding bracket 13 of the prestressed concrete paving slabs 1a and 1b, the tapered side surface portion 1 is provided.
4a is elastically deformed to become a vertical surface and closely adheres to the inner wall surface of the holding bracket 13, so that no gap is formed between the upper side surface of the rubber gasket body 10 and the holding bracket 13, and the side surface of the rubber gasket body 10 It is possible to effectively prevent rainwater, sand, pebbles, and the like from entering between the holding fitting 13.

[0014]

According to the present invention, an engaging recess having a trapezoidal cross section is formed on the side surface of the opposing upper end face of the prestressed concrete paving slab formed with a play portion having a predetermined gap as described above. , Fixing the holding bracket integrally provided with a receiving portion projecting toward the play portion side at a lower portion,
At the play portion of the prestressed concrete paving slab, a convex engagement protrusion that engages with the engagement concave portion is provided on a side surface, and a rubber gasket body having a support surface formed on the bottom surface that contacts the receiving portion is mounted. The rubber gasket main body has a horizontal portion forming a horizontal plane with a prestressed concrete paving slab on both sides of an upper surface, and a V-shaped concave portion formed on the upper surface at the center in the width direction toward the lower side of the play portion, and on both sides of the bottom surface. The support surface is formed, and a V-shaped convex portion is integrally formed at a central portion toward a lower side of the play portion. Since the cavity is defined by the horizontal ribs provided in the direction, even if the load of the tire of an airplane or towing vehicle rides on the horizontal portion of the rubber gasket body of the play area, the rubber gasket body is Because it is supported by the receiving portion and the engaging recess provided in the lifting bracket it can effectively prevent the falling down of the joint Joint Gap portion.

Further, since the rubber gasket main body is formed on the upper side surface of both side shoulders with tapered side parts which are opened outward before the rubber gasket main body is mounted on the holding metal fitting of the prestressed concrete paving slab, the rubber gasket is formed. When the main body is contracted and fitted to the holding metal fitting of the prestressed concrete paving slab, the tapered side part is elastically deformed to become a vertical surface and adheres tightly to the inner wall surface of the holding metal fitting. There is no gap between the holding metal fittings, and it is possible to effectively prevent rainwater, sand, pebbles, and the like from entering between the side surface of the rubber gasket main body and the holding metal fittings.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional elastic joint structure for prestressed concrete pavement.

DESCRIPTION OF SYMBOLS 1a, 1b Prestressed concrete paving slab 7 Engaging recess 8 Receiving portion 10 Rubber gasket main body 11 Engaging projection 12 Support surface 13 Retaining metal 14 Horizontal portion 14a Tapered side surface portion 15 Recess 16 Convex portion 17 Vertical rib 18 Side rib 19 Cavity X Playing area

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ken Miyauchi 1769-3 Terasaki, Sakura City, Chiba Prefecture

Claims (2)

[Claims] 1. An opposing upper end face of a prestressed concrete pavement slab formed with a play portion having a predetermined gap therebetween, and an engaging recess having a trapezoidal cross section is formed on a side face,
A holding fitting integrally provided with a receiving part projecting toward the play part side at a lower part is fixed, and a convex engagement protrusion which engages with the engagement recess on a side surface is provided at a play part of the prestressed concrete paving slab. And a rubber gasket body having a support surface formed on the bottom surface in contact with the receiving portion, and the rubber gasket body has a horizontal portion forming a horizontal plane with a prestressed concrete paving slab on both sides of an upper surface.
A V-shaped concave portion is formed on the upper surface at the center in the width direction toward the lower side of the play portion, the support surface is formed on both sides of the bottom surface, and a V-shaped portion is formed at the center portion toward the lower side of the play portion. -Shaped convex part is formed integrally, and inside the rubber gasket main body,
A stretchable joint structure for prestressed concrete pavement, wherein a cavity is defined by a central vertical rib and a horizontal rib provided in the middle in the width direction. 2. The rubber gasket body according to claim 1, wherein the rubber gasket body has tapered side surfaces that are open outward before being mounted on a prestressed concrete paving slab. Telescopic joint structure for prestressed concrete pavement.