JPH0754305A - Face plate for extensible device of bridge - Google Patents

Abstract

PURPOSE:To shorten any step generated in the extensible joint of a bridge so as to reduce shocks against traveling cars and improve the comfortableness and further, increase the durability of a road surface. CONSTITUTION:In the face plates 15 buried respectively on the opposite sides of the extensible joint of a bridge road surface comb-teeth like protrusions 15b fitting to respective opposite sides of each face plates 15 are provided. Rather longer comb-teeth like protruded members 15c are provided at the side opposite to the mutually confronting sides. The protruded members 15c are inclined against the longitudinal direction of the road, two-dimensionally and the front end of the protruded members 15c are bent downward, three- dimensionally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a face plate for an expansion / contraction device in which a slight gap is interposed in a joint portion in order to absorb a linear expansion due to a temperature change of a bridge.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show an example of a conventional expansion / contraction device for steel girders, in which 1 is an abutment side, 2 is a steel girder side, 3 is an end steel material on the end girder side, 4 is the end steel material on the steel girder side,
5 and 6 are anchor bars, 7 is rebar, 8 is end steel 3,4
A face plate is provided horizontally above, and 9 is a paving layer formed on the same plane as the face plate 8.

7 and 8 show an example of a conventional expansion / contraction device for a concrete girder, in which 10 is a concrete girder, 11 is an anchor bolt in which a base is embedded in the concrete girder, and 12 is a concrete girder. This anchor bolt 1
The receiving plate is supported by a nut 13 screwed to 1, and in this case, the face plate 8 is placed on the receiving plate 12 and is fixed to the anchor bolt 11 by the nut 14.
Reference numeral 7 is a reinforcing bar, and 9 is a pavement layer formed on the same plane as the face plate 8.

[0004]

However, when the above-described conventional expansion / contraction device is used for the joint portion of the bridge road surface,
Due to the relative strength difference between the face plate 8 and the pavement layer 9 adjacent to the face plate 8, the wear amount of the pavement layer 9 is far greater than that of the face plate 8 when used for a long period of time. Since it is large, the surface of the pavement layer 9 is lower than the surface of the face plate 8 and a step is generated at the joint between the face plate 8 and the pavement layer 9, and as a result, the vehicle receives an impact during traveling and the riding comfort deteriorates. In addition, since the impact sound is generated and the expansion device itself is damaged, there is a problem that it takes a lot of labor and cost to repair and maintain the expansion device.

[0005]

In order to solve the above problems, according to the present invention, face plates embedded in opposite sides of an expansion joint of a bridge road surface are fitted to opposite sides of the face plate. In addition to providing a comb-tooth-shaped protrusion, a long comb-tooth-shaped protrusion is provided on the opposite side of the opposite side, and the protrusion is planarly inclined with respect to the longitudinal direction of the road and The tip of the ridge is bent downward to form a face plate for a bridge telescopic device.

[0006]

As described above, in the face plate of the present invention, a long comb tooth-shaped ridge is provided on the opposite side of the opposite side, and the ridge is planarly inclined with respect to the longitudinal direction of the road. ,
Since the tip of the ridge is curved downward in a vertical direction, even if the pavement layer is worn, the tip of the ridge will be downward downward in the area adjacent to the face plate. There is a long ridge that is curved to eliminate sharp steps. Therefore, the impact on the traveling vehicle is reduced, the riding comfort is improved, and the durability of the expansion device and the pavement layer are improved.

Further, since the long ridges of the face plate of the present invention are two-dimensionally inclined with respect to the longitudinal direction of the road, no rut is formed between the long ridges. Therefore, accidents due to ruts on motorcycles and the like can be reduced, and traffic safety can be improved.

Further, according to the present invention, since a large step is not formed at the joint between the face plate and the pavement layer as described above, the cutting edge of the snow removing machine in the snowy region catches the step and digs up the face plate. There are no accidents.

[0009]

Embodiments of the present invention will be described below with reference to FIGS. In the figure, the same symbols as the above-mentioned symbols indicate the same items. That is, FIGS. 1 and 2 show an embodiment in which the present invention is applied to a telescopic device for steel girders.
In the figure, 1 is the abutment side, 2 is the steel girder side, 3 is the end steel material on the end platform side,
4 is an end steel material on the steel girder side, 5 and 6 are anchor bars, and 7 is a reinforcing bar.

In this embodiment, the strip-shaped base 15a is used.
A comb tooth-shaped projection 15b is provided on one side edge, and a long comb tooth-shaped protrusion 15c is projected on the other side edge opposite to the comb-shaped projection 15b.
The ridge 15c is inclined with respect to the longitudinal line L (see FIG. 2) of the road by an angle θ in plan view, and as shown in FIG. 1, the tip end of the ridge 15c is faced downward. It is curved to form the face plate 15 for the expansion and contraction device of the bridge.

To attach the face plate 15, the receiving plates 3a provided on the upper surfaces of the steel members 3 and 4 at the end portions,
The base body 15a of the face plate 15 is placed on the surface 4a, and the bolts 16 are inserted into the stepped holes 15d provided in the face plate 15 and the holes provided in the receiving plates 3a, 4a and fastened with the nuts 17. After that, the pavement layer 9 may be laid as usual.

3 and 4 show an embodiment in which the present invention is applied to a telescopic device for a concrete girder, in which 10 is a concrete girder and 11 is a concrete girder with a base portion. An embedded anchor bolt 12 is a receiving plate supported by a nut 13 screwed to the anchor bolt 11. The face plate 15 is the same as that of the above-described embodiment, in which case the face plate 15 is placed on the receiving plate 12 and fixed to the anchor bolt 11 by the nut 14. Reference numeral 7 is a reinforcing bar, and 9 is a pavement layer formed on the same plane as the face plate 15.

[0013]

As described above, in the face plate 15 of the present invention, a long comb tooth-shaped protrusion 15c is provided on the opposite side of the opposing side, and the protrusion 15c is planarly arranged in the longitudinal direction of the road. Since the tip end of the protrusion 15c is curved downward while being inclined with respect to the vertical direction, even if the pavement layer 9 is worn, the portion adjacent to the face plate 15 is raised. Long ridge 1 with the tip curved downward in a plane
Since there is 5c, there is no sharp step. Therefore, according to the present invention, it is possible to obtain the effects of reducing the impact on the traveling vehicle, improving the riding comfort, and improving the durability of the expansion device and the pavement layer.

Further, since the long ridges 15c of the face plate 15 of the present invention are two-dimensionally inclined with respect to the longitudinal direction of the road, no rut is formed between the long ridges 15c. Therefore, according to the present invention, there is also an effect that accidents due to rutting of a motorcycle or the like are reduced and traffic safety can be improved.

Further, according to the present invention, since a large step is not formed at the joint between the face plate 15 and the pavement layer 9 as described above, the cutting edge of the snow removing machine in the snowy region catches the step and digs the face plate 15. It also has the effect of eliminating accidents such as those that occur.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a face plate of the present invention is attached to a telescopic device for steel girders.

FIG. 2 is a plan view of the face plate of FIG.

FIG. 3 is a vertical cross-sectional view showing a state in which the face plate of the present invention is attached to a telescopic device for a concrete girder.

FIG. 4 is a plan view of the face plate of FIG.

FIG. 5 is a vertical cross-sectional view showing a state in which a conventional face plate is attached to a telescopic device for steel girders.

FIG. 6 is a plan view of the face plate of FIG.

FIG. 7 is a vertical cross-sectional view showing a state in which a conventional face plate is attached to a telescopic device for a concrete girder.

FIG. 8 is a plan view of the face plate of FIG.

[Explanation of symbols]

 1 Abutment side 2 Steel girder side 3 Abutment side end steel material 4 Steel girder side end steel material 5 Anchor bar 6 Anchor bar 7 Reinforcing bar 8 Conventional face plate 9 Pavement layer 10 Concrete girder 11 Anchor bolt 12 Receiving plate 13, 14 Nut 15 Face plate of the present invention 15a Strip plate-shaped substrate 15b Comb-shaped protrusion 15c Long comb-shaped protrusion 15d Stepped hole 16 Bolt 17 Nut

Claims (1)

[Claims] 1. A face plate embedded in each of opposite sides of an expansion joint of a road surface of a bridge, provided with comb-teeth-like protrusions which are fitted to each other on opposite sides of the face plate, and has a long side opposite to the opposite sides. Characterized in that a comb tooth-shaped ridge is projected, the ridge is planarly inclined with respect to the longitudinal direction of the road, and the tip of the ridge is curved downward in a vertical manner. Face plate for expansion and contraction device of bridge.