JPS6253644B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a road joint expansion and contraction device.

As an example of a road joint expansion/contraction device, one end of a steel tooth-shaped plate, which has a tooth-shaped end face on the side of the flat plate, is fixed to the opposite road end with a clearance with an anchor bolt, and both tooth-shaped plates are meshed together. There is an interlocking type, but during construction, the position of the anchor bolts installed in advance at the edge of the road and the bolt holes in the steel tooth profile plate tends to be misaligned, making it difficult to perform quick and accurate construction. There is a problem.

In addition, as another example of the above-mentioned interlocking type expansion and contraction device, there is also a so-called finger joint in which a steel face plate formed in the shape of a finger is supported by a web and a lower plate. Since the joint is fixed to the steel girder, it is difficult to construct the joint using retrofitting methods, that is, after the slab is poured. Furthermore, both the steel tooth profile plate and the face plate have the problem that machining of the end face on the clearance side takes time and effort, making them relatively expensive.

In addition, since both the above-mentioned steel tooth profile plate and face plate are widely exposed on the road surface, when pouring post-cast concrete, the concrete is difficult to wrap around the bottom of the tooth profile plate or face plate, and the concrete is poured. This may result in insufficient equipment and lower load-bearing strength.Furthermore, in the case of tooth-shaped plates, a separate template must be installed below the tooth-shaped plate when pouring concrete, which is a problem in that workability is poor. There is.

In view of these points, the present invention provides a method of constructing the above-mentioned interlocking type road joint expansion/contraction device with ease, and solves the above-mentioned conventional problems.

That is, the construction method according to the present invention is a method for obtaining an interlocking type road joint expansion and contraction device by combining a pair of vertical plates and a plurality of unit road surface members, and the vertical plates are provided with intervals in the road width direction. A plurality of upwardly opening notches are formed at the road surface member, and a horizontal part is formed at the upper end of the road surface member. Place them facing each other so as to face between the notches of the other vertical plate,
Next, the road surface members in each notch of both vertical plates are fitted to make the horizontal part of the road surface member approximately match the road surface height, and the front end of the road surface member is placed between both vertical plates, and the rear end is placed between the vertical plates. This is characterized by the fact that the two vertical plates each protrude from the back of the plate, and concrete is poured into the back of both vertical plates.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below based on embodiments with reference to the drawings.

Example 1 This example is shown in FIGS. 1 to 4, and consists of three steps: a preparation step, an assembly step, and a finishing step.

First, the preparation step is shown in FIGS. 1 and 2, and is a step of preparing the joint member so that it can be easily constructed at the road joint. In Figure 1,
Reference numerals 1 and 1 denote vertical plates, and a plurality of concave notches 2 opening upward are formed at the upper part of each vertical plate 1 at intervals S in the road width direction. Both vertical boards 1, 1 are arranged so that the notches 2 of each other appear alternately in the road width direction, that is, the notches 2 of one vertical board 1 are aligned with the notches 2 of the other vertical board 1. Both side parts of a sealing member 3 formed with a flexible material such as rubber and having a U-shaped cross section are fixed to the opposing inner surfaces of both vertical plates 1, 1, facing between the parts 2. . Furthermore, anchor bars 4 are provided protruding from the back surfaces of both vertical plates 1, 1.

FIG. 2 shows a road surface member 5 to be combined with the vertical plate 1.
It is shown. This road surface member 5 is a plate material that is long in the bridge length direction and has a width W equivalent to the notch 2 of the vertical board 1, that is, a width that can fit into the notch 2.
A horizontal portion 6 is formed at the upper end. A recess 7 is formed in the center of the road surface member 5 by a predetermined length l from the front end thereof and opens downward, and the front end corner 7a of the recess 7 is formed at a substantially right angle. Further, anchor lines 8, 8 protrude downward from the recess 7. The wall thickness t above the recess 7 of the road surface member 5 substantially matches the depth of the notch 2 of the vertical plate 1, and the portion having the length l becomes a protrusion 9, which will be described later.

The assembly process is shown in FIG. 3, and is a process of assembling the vertical plate 1 and the road surface member 5 to the road joint. The figure shows an example of the retrofitting method.

First, after the floor slab 10 is cast and the pavement 11 is applied, cutout steps 13, 13 are formed at opposing road edges with a gap 12 in between. This notch step portion 13 may be formed by a so-called box cutting method using a template when pouring the floor slab 10. After that, a horizontal rod 14 is attached to the upper ends of the pair of vertical plates 1, 1 connected by the seal member 3, and both ends of the horizontal rod 14 are bridged onto the pavements 11, 11 on both sides of the notched steps 13, 13. By doing so, both vertical plates 1, 1 are connected to both notched step portions 13,
Hang it in the center between 13. As a result, the upper ends of both vertical plates 1, 1 are substantially aligned with the road surface height at the road joint, and the notch 2 of one vertical plate 1 is not connected to the notch 2 of the other vertical plate 1. They will face each other so as to face between the openings 2.

Next, a weir plate 15 for preventing concrete leakage into the clearance space 12 is fixed to the lower end of the back surface of the vertical board 1, and anchor bars 4 protruding from the back surface of the vertical board 1, through bars 16 arranged in the road width direction, and the floor are fixed. Each intersection of the U-shaped stirrup strips 17 previously buried in the end of the plate is connected by welding or the like to support the vertical board 1 at the road joint. After removing the horizontal rod 14, the road surface member 5 is fitted into each notch 2 of the vertical board 1 at the front end of the recess 7, and the vertical surface of the front corner 7a of the recess 7 is The inside, that is, the play area 12
The road surface member 5 is positioned by bringing it into contact with the side surface. With this positioning, the front end of the road surface member 5 protrudes toward the play area 12 to form a protrusion 9, the length of which is l in FIG. 1
In other words, it approximately coincides with the road surface height. After that, the intersections of the anchor bars 8, 8 projecting downward from the road surface member 5, the through bars 16, the anchor bars 4 projecting from the back surface of the vertical plate 1, and other reinforcing bars are joined by welding or the like to form a road surface member. I support 5.

In the finishing process, concorite is poured into the notched steps 13, 13 on the backs of the vertical boards 1, 1 to the height of the horizontal part 6 of the road surface member 5, and then the concrete is compacted and the concrete surface is finished. As shown in the figure, post-cast concrete 18 is formed to complete the construction. In this finishing process, the vertical plate 1
serves as a template for pouring concrete, and since each road surface member 5 is vertically long and spaced apart in the road width direction, and does not cover the road surface widely, concrete is poured from both sides of the road surface member 5. The concrete will wrap around the lower surface of the road surface member 5, and concrete placement will not be insufficient. In addition, in the figure,
Reference numeral 19 indicates a distribution bar of the floor slab 10.

In the road joint expansion/contraction device obtained in this example, the horizontal part 6 of the road surface member 5 is flush with the road surface, and between the protruding parts 9 of each road surface member 5 that protrude from one vertical plate 1 to the clearance 12. , the joint clearance 20 that is open to the road surface and is exposed to the protrusion 9 of the road surface member 5 that protrudes from the other vertical plate 1 has a wavy shape. Furthermore, the boundary line between the vertical plate 1 and the joint member 5 and the post-cast concrete 18 also has a wave shape (comb shape).

The interval S between each fitting part 2 of the vertical plate 1, that is, the interval between each road surface member 5, is about 15 to 200 mm, and since the tires of the vehicle run on the road surface member 5, the wear of the post-cast concrete 18 is reduced. Prevented. In order to prevent such wear, it is preferable that the distance S is narrower than the tire width, and in some cases, it may be approximately the same as the width of the road surface member 5. The width of the road surface member 5 is 15
~35mm is preferable. Further, the length of the protruding portion 9 of the road surface member 5 is preferably about 1/3 to 1/6 of the length of the entire road surface member in consideration of load-bearing strength.

In addition, in the case of the pre-casting method, after the floor slab 10 is placed and before paving is applied, the vertical plates 1 and the road surface members 5 are assembled into the notch steps 13, and after the post-cast concrete 18 is formed, the paving is applied. It turns out.

Embodiment 2 This example is a case using the super advance construction method and is shown in FIG. In other words, the vertical board 21 used in this method
has a bottom plate 22 fixed to its lower end, and the back surface of the vertical plate 21 and the top surface of the bottom plate 22 are connected by a reinforcing plate 23, and the bottom plate 22 has mounting holes for high-strength bolts 24. A through hole 25 into which concrete is inserted is provided in the plate 23.

During construction, first attach the bottom plate 22 at the lower end of the vertical plate 21 to the upper flange 27 of the steel girder 26 using high-strength bolts 2.
4, and then the notch 2 at the top of the vertical plate 21.
The road surface member 5 is fitted to. After that, the floor slab is placed up to the back of the vertical board 21 and paved.

Note that an anchor bar may be provided on the vertical plate 21 in place of the reinforced plate 23, and this reinforcing plate 23
and anchor muscles may be used together.

Next, modified examples of the road surface member will be explained based on FIGS. 6 to 14.

The road surface member 30 shown in FIG.
is formed, and anchor lines 8, 8 protrude from the lower surface. The road surface member 30 of this example can be set by appropriately changing the protrusion length of the road surface member 30 into the gap at the construction site.

The road surface member 33 shown in FIG. 7 has an L-shaped notch formed on its lower surface to form a protrusion 34, and a horizontal portion 35 extending over its entire length is formed at its upper end. The road surface member 33 of this example is as shown in FIG.
By cutting two pieces out of a single rectangular plate, it is possible to cut the pieces with less leftover material.

A road surface member 37 shown in FIG. 9 has a lower end of a protruding portion 38 at the front end extending downward longer than the road surface member 5 shown in FIG. 2, and a horizontal portion 39 is formed at the upper end. When a wheel load acts on the protrusion 38, the road surface member 37 receives a force in a clockwise direction using the bottom of the notch in the vertical plate as a fulcrum in the illustrated example, but the protrusion 38 is greatly extended downward and vertically Since it is in contact with the plate, the rear end of the road surface member 37 is prevented from floating upward, resulting in high stability.

The road surface member 40 shown in FIG. 10 has a rear end portion 41 that protrudes significantly downward, contrary to the road surface member 40 shown in FIG. 9, and a horizontal portion 42 is formed at the upper end. In this example, the rear end portion 41 is deeply buried in the concrete portion, resulting in good stability. Note that a front downward taper 43 is formed at the front end of the horizontal portion 42 .

The road surface member 45 shown in FIG.
A protruding portion 46 is formed by cutting out a letter shape, and the upper end has a horizontal portion 47 on the front side and an inclined portion 48 on the rear side that slopes downward following the horizontal portion 47. By cutting out two road surface members 45 from a single rectangular board as shown in FIG. 12, it is possible to cut out the planks with less remaining material.

In the case of this example, the road surface member 45 is placed in the notch 2 of the vertical board 1.
In the fitted state, the horizontal part 47 matches the road surface height, and when concrete is poured on the back of the vertical board 1, the inclined part 48 is buried in the concrete. The inclined portion 48 is partially exposed when the concrete surface of the road is worn out due to rutting or the like, and allows the tires of the vehicle to smoothly transition from the worn concrete surface to the horizontal portion 47, thereby maintaining good vehicle running performance. In addition, in a road bridge in a snowy area, the slope portion 48
Even if exposed, the scraper of the snowplow will slide on the slope 48, and the scraper will collide with the road surface member 45.
And damage to the vertical plate 1 is prevented.

The inclined portion may be sloped downward in a straight line, or may be sloped downward in a curved shape with a predetermined curvature.
In the case of a linear downward slope, the slope with respect to the horizontal part is 10 to 35 degrees, preferably 15 to 20 degrees.

The joint member 50 shown in FIG.
1, and a horizontal portion 52 and an inclined portion 53 similar to those shown in FIG. 11 are formed at the upper end. In the case of this example, by fitting the fitting groove 51 into the vertical plate 1, the joint member 50 and the vertical plate 1 can be integrated.

The joint member 55 shown in FIG.
A horizontal section 56 and an inclined section 5 similar to those shown in the figure.
7, and a recess 58 similar to that shown in FIG. 2 is formed in the lower part. In this example, even if the scraper of the snowplow hits the slope, the joint member 55 is prevented from shifting forward by the concrete interposed in the recess 58.

Among the road surface members described above, the taper 43 is formed in the road surface member 40 shown in FIG. 10, but such a taper may also be formed in other road surface members.

In the first embodiment, each road surface member alternately protrudes from the opposing vertical plate in the road width direction, but as shown in FIG. 10, a plurality of road surface members may protrude alternately. That is, in the same figure, the vertical plates 61, 61 have relatively narrow intervals.
A set of two notches 62, 62 opened after S ₁
are arranged in the road width direction with a relatively wide interval S ₂ , and a road surface member 63 is fitted into each notch 62 .

Incidentally, in the case of a diagonal bridge, the side surface (rising surface) of the notch in the vertical board is diagonal to the longitudinal direction of the vertical board,
The road surface member and the vertical board intersect diagonally.

In addition, in this specification, concrete means
In addition to regular cement concrete, it refers to civil engineering materials that can be poured and hardened, such as asphalt concrete, resin mortar, and resin concrete synthetic resin.

In addition to steel bridges in which the present invention forms deck slabs on steel girders, prestressed concrete (PC) girder bridges, reinforced concrete (RC) girder bridges,
Of course, it can also be applied to steel slab bridges.

As described above, according to the present invention, the combination of the vertical plate and the road surface member reduces the wear of concrete that has a corrugated joint clearance and has a corrugated boundary between the concrete and the joint means. It is possible to obtain an interlocking type expansion/contraction device with good runnability, and the members constituting the joint means are simple in shape, and the manufacturing cost is lower than that of conventional interlocking type expansion joint members. The height and mounting position can be determined simply by fitting the vertical plate, and the vertical plate can also be used as a template for pouring concrete, making construction easier.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIGS. 1 to 4 relate to Embodiment 1. FIG. 1 is a perspective view showing a pair of vertical plates in an assembled state, and FIG. 2 shows a joint member. 3 is a sectional view cut in the bridge length direction showing the process of assembling the vertical plate to the road joint part; FIG. 4 is a perspective view showing the road joint expansion/contraction device taken in cross section in the bridge length direction; FIG. The figures are similar to FIG. 3 in Embodiment 2, FIGS. 6, 7, 9, 10, and 11 are perspective views showing other examples of road surface members, and FIG. 8 is a diagram similar to FIG. FIG. 7 is a plan view showing an example of planking of the road surface member, FIG. 12 is a plan view showing an example of planking of the road surface member shown in FIG. 11, and FIGS. 13 and 14 are other examples of joint members. Side view showing 15th
The figure is a plan view showing an interlocking type road joint expansion and contraction device different from the first embodiment. 1, 21, 61... Vertical plate, 2, 62... Notch, 4, 8... Anchor bar, 5, 30, 33, 3
7, 40, 45, 50, 55, 63... Road surface member, 6, 31, 35, 42, 47, 52, 56...
...Horizontal part, 9, 34, 38, 46...Protrusion part, 1
0...Floor slab, 11...Pavement, 12...Playroom, 13
... Notch step, 18 ... Post-cast concrete, 20
...Joint play.

Claims (1)

[Claims] 1. A vertical board has a plurality of upwardly opening notches formed at intervals in the road width direction, and a road surface member has a horizontal part formed at the upper end, and It has a width that can fit into the notches, and a pair of vertical plates are placed opposite each other at the road joint so that the notches in one vertical plate face between the notches in the other vertical plate. Then, the road surface member is fitted into each notch of both vertical plates to make the horizontal part of the road surface member approximately match the height of the road surface, and the front end of the road surface member is inserted between both vertical plates. A method for constructing a road joint expansion/contraction device, characterized in that the rear ends are made to protrude from the backs of vertical plates, respectively, and concrete is poured on the backs of both vertical plates.