JPH0516808U - Expansion joints for prestressed concrete pavement - Google Patents

Abstract

(57) [Summary] [Purpose] To provide stretch joints that can be used for joints of PC pavement slabs that have large stretch amounts. [Structure] Gasket holding metal fittings 6 and 6 are fixed to end surfaces of PC paving slabs 2 and 2 which face each other. A hollow cylindrical rubber gasket 4 between both gasket holding metal fittings 6 and 6.
Is inserted in a compressed state. A ridge 9 is integrally formed on both side surfaces of the gasket 4, and the ridge 9 is fitted into the groove 8 of the gasket holding fitting 4 to prevent the ridge from coming off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to expansion joints provided between PC pavement plates in prestressed concrete (hereinafter referred to as PC) pavement.

[0002]

[Prior Art]

 Generally, in concrete pavement, expansion joints are placed between the end faces of adjacent pavement plates in order to absorb the expansion and contraction of the pavement plate due to temperature changes. Generally, asphalt-based joint material is poured into a joint gap in a heated state, and asphalt-based joint material is pre-formed into a plate shape and a joint plate is intervened during concrete pouring. It was.

[0003]

[Problems to be solved by the device]

 However, in recent years, there has been a problem that a single pavement plate for PC pavement tends to be elongated, and therefore the amount of expansion and contraction of joints increases, and conventional expansion and contraction joints cannot sufficiently follow up.

Further, since the conventional expansion joint is not considered for repair, there is a problem that it cannot be repaired even if it is damaged.

In view of such conventional problems, the present invention is capable of sufficiently elastically following even a joint having a large expansion / contraction amount between PC paving slabs, and can be easily replaced and repaired for PC paving expansion / contraction. The purpose is to provide joints.

[0006]

[Means for achieving the object]

 The features of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose are that gasket holding metal fittings are integrally provided on each end face of the prestressed concrete pavement plate facing each other, and each gasket holding metal fitting is provided. It is an expansion joint for prestressed concrete pavement in which a joint material consisting of a hollow cylindrical gasket made of rubber is supported in a compressed state.

According to the present invention, the both sides of the gasket and the surface of the gasket holding metal fitting are provided with concave and convex lines which are fitted to each other in the horizontal direction, and by fitting the concave and convex lines, the end surface of the press-rest concrete pavement plate is fitted. A gasket may be held between them, and the upper and lower surfaces of the gasket have a low V-shaped cross-section center, and a vertical partition wall is provided between the central portions of the upper and lower cross-sections. In the meantime, a horizontally oriented partition whose side is vertically inclined may be integrally provided.

[0008]

[Action]

 The expandable joint for PC pavement of the present invention uses a hollow rubber gasket as a joint material and inserts it in the joint space in a compressed state. Therefore, the elastic joint tends to expand when expanding the joint space. It expands in the width direction, and conversely, when the joint spacing is reduced, it is reduced by the pressure.

Further, by holding the gasket holding fitting by fitting the concave-convex ridges, it is possible to easily replace the gasket when the damage or the elastic force is reduced. Furthermore, a vertical partition is provided in the center of the gasket, the upper and lower surfaces are V-shaped, and there is a horizontal partition in the same direction as the V-shape in which the vertical partition side is lowered, so that the central part is downward during compression. It will bend, and it will never project above the road surface beyond the joint spacing.

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is a roadbed, 2 is a PC paving slab, 3 is a joint spacing between both PC paving slabs 2, 2 is a gasket housed within the joint spacing 3.

A PC steel material 5 is inserted into each of the PC paving slabs 2 and 2, and stress is introduced by tensioning and fixing the PC steel material 5 at both ends. Gasket holding metal fittings 6, 6 are fixed to the upper facing surfaces of both PC paving slabs 2, 2. The gasket holding metal fitting 6 has a dowel reinforcing bar 7 fixed to its back surface and is embedded and fixed in the PC paving slab 2. Further, the gasket holding metal fitting 6 is provided with a concave groove 8 for horizontally fitting a gasket at the center of the front surface thereof which is continuous in the horizontal direction.

The gasket 4 is made of a rubber material and is formed into a hollow cylindrical shape. On both side surfaces, projections 9 that fit into the grooves 8 of the gasket holding fitting 6 are integrally formed by projection. In addition, the gasket 4 has upper and lower surfaces 10 and 11 formed in a V-shaped cross-section having a low center, and a vertical partition 12 is integrally formed in the center of the interior. Horizontally-formed partition walls 14, 14 ... In which the vertically-oriented partition wall side is lowered are integrally formed.

In the above-mentioned embodiment, the case where the PC paving slabs 2 and 2 are adjacent to each other through the joint is shown. However, as shown in FIG. When an RC plate 15 made of cast-in-place concrete that does not apply prestress is interposed between the plates 2 and 2, the gasket holding metal fitting 6 is integrally fixed to the end surface of the RC plate 15, and the same as above. To hold the gasket 4.

The gasket 4 configured as described above is inserted into the joint space 3 in a state where both side surfaces are compressed, and expands and contracts following the large expansion and contraction of the long PC paving slabs 2 and 2. The compressed state is always maintained, and the watertight state of the joint space 3 is also maintained.

[0016]

[Effect of the device]

 As described above, the expansion joint for PC pavement of the present invention is capable of following a large expansion and contraction, that is, a large change in the joint interval, by accommodating the rubber hollow cylindrical gasket in the joint interval in the compressed state. The watertightness can be maintained.

Further, when the gasket has reduced elasticity or is damaged due to some cause, it can be easily replaced. Furthermore, since the entire cross section is V-shaped, it will bend downward when compressed, and it will not project to the surface of the paving slab, and there will be an effect such as good running performance of the vehicle.

[Brief description of drawings]

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

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

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Roadbed 2 PC Pavement Plate 3 Joint Spacing 4 Gasket 5 PC Steel Material 6 Holding Metal 7 Gibel Reinforcing Bar 8 Groove 9 Groove 10 and 11 Upper and Lower Surface 12 Vertical Partition 13 Side Wall 14 Horizontal Partition 15 RC Plate

Continuation of the front page (72) Inventor Ken Miyauchi 1769-3 Terasaki, Sakura City, Chiba Prefecture

Claims (3)

[Scope of utility model registration request] 1. A gasket holding metal fitting is integrally provided on each end surface of the prestressed concrete pavement plate facing each other, and a joint material made of a rubber hollow cylindrical gasket is compressed by being supported by each gasket holding metal fitting. Expansion joints for prestressed concrete pavement. 2. A concave-convex strip that fits with each other is provided in a horizontal direction on both side surfaces of the gasket and a surface of the gasket holding metal fitting, and the gasket is held between the end faces of the prestressed concrete pavement plate by fitting the concave-convex strip. The stretch joint for prestressed concrete pavement according to claim 1. 3. The upper and lower surfaces of the gasket have a low V in the center of the cross section.
A vertical partition wall is provided between the central portions of the upper and lower surfaces in cross section, and a horizontal partition wall is provided integrally between the vertical partition wall and both side walls, with the vertical partition wall side being inclined low. Item 3. A stretch joint for prestressed concrete pavement according to Item 1 or 2.