JPS6253643B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a road joint expansion and contraction device constructed at a joint part of a road bridge.

As an example of a road bridge, there is a so-called steel bridge in which concrete slabs are poured on top of steel main girders. In these steel bridges, finger joints have been more commonly used as main girder anchoring road joint expansion and contraction devices. This finger joint has a pair of horizontal face plates with corrugated end faces on the side of the road joint, which are interlocked with each other with a joint gap, and each face plate is supported by the main girder via the web and the lower plate. This is an interlocking type telescoping device, but because it takes time and effort to manufacture, it has to be relatively expensive. In addition, it is difficult to fill the bottom surface of the face plate with post-battery material, resulting in poor durability.
When the paved surface on the back of the face plate is worn out due to rutting, etc., a step between the face plate and the paved surface that extends in a straight line along the entire length of the road width device impedes vehicle drivability, and also causes noise and noise.
There is a problem in that road traffic pollution is caused by vibrations.

In view of the above, the present invention configures an interlocking type expansion/contraction device by combining a pair of support members and a unit road surface member, thereby eliminating the need for complicated processing such as corrugation processing required for conventional face plates. The objective is to reduce manufacturing costs and to prevent deterioration of vehicle running performance due to abrasion of the concrete surface and insufficient filling of post-casting material.

That is, the road joint expansion/contraction device of the present invention installs a pair of support members each having a bottom plate at the lower end of the vertical plate at the ends of the main girder or steel deck facing each other with a clearance between the main girders and the steel deck slab. Fixed by joining the steel deck and bottom plate,
The upper end of the vertical plate is made to substantially match the road surface, and a plurality of fitting parts opening upward are formed on this vertical plate at intervals in the road width direction, and each road surface member having a horizontal part on the upper surface is It fits into the fitting part and aligns the horizontal part with the road surface, and also causes the front end of the road surface member to protrude toward the clearance side from the vertical board, and the rear end to protrude toward the back of the vertical board, and also to make the clearance from one vertical board. The front end of the road surface member that protrudes from the other vertical board faces between each road surface member that protrudes to the side, and by pouring post-casting material such as concrete on the back of both vertical boards, the vertical board and the road surface are separated. It is characterized in that, depending on the combination of the members, both the play area side and the back-beating material side have a corrugated shape.

Embodiments of the present invention will be described below based on the drawings.

Example 1 This example is illustrated in FIGS. 1-3. 1st
In the road joint expansion/contraction device 1 shown in the figure, 2, 2 are steel main girders facing each other with a girder gap 3 at the road joint, and are constructed on bridge piers (not shown). Floor slabs 4, 4 are cast on the main girders 2, 2, and in the case of this example, notched step portions 4a, 4a are formed at the ends of the floor slabs 4, 4 by box cutting. And main girder 2,
Support members 5, 5 are respectively fixed to the ends of 2, a road surface member 6 is attached to each support member 5, 5, and post-casting materials 7, 7 are cast on the backs of both support members 5, 5. There is. 8 is pavement.

As shown in FIG. 2, the support member 5 is
It has a structure in which a bottom plate 10 is fixed to the lower end of the vertical plate 9, and a plurality of fitting portions 11 opening upward are formed at the upper end of the vertical plate 9 at intervals S in the road width direction. This fitting part 11 is formed by cutting out the vertical plate 9 into a rectangular shape, and its opening width and depth are determined according to the width W and wall thickness T of the road surface member 6, which will be described later. It is made so that it can be combined.
The front and bottom surfaces of a reinforcing plate 12 are fixed to the back surface of the vertical plate 9 and the top surface of the bottom plate 10. In addition, the reinforcing plate 12
A through hole 13 is provided in the through hole 13, through which the post batting material 7 cast on both sides of the reinforcing plate 12 is connected, and through which the reinforcement 21 can be passed. ing. Further, a sealing member 14 is fixed to the opposing inner surfaces of both vertical plates 9, and an anchor wire 15 is fixed to the back surface of the vertical plate 9.

On the other hand, as shown in FIG. 3, the road surface member 6 is
This is a rectangular parallelepiped plate with a rectangular cutout in the center of its lower part to form a recess 16 that opens downward.
is about 15-35mm, length is about 150-500mm, recessed part 1
The wall thickness t above 6 is about 20 to 50 mm, and the portion of length l extending from the recess 16 to the front end becomes a protrusion 17 to be described later. Further, a horizontal portion 18 is formed on the upper surface of the road surface member 6 over its entire length, and furthermore, the recessed portion 1
The corner side corner portion 16a of No. 6 is made at a substantially right angle, and the recessed portion 16
Anchor bars 19 are provided to protrude downward from.

At the road joint, the vertical plates 9, 9 of the support members 5, 5 face each other with a predetermined interval, and the bottom plates 10, 10 are connected to the upper flanges 2a of the main girders 2, 2 by bolts 20, respectively. . It is designed to appear in and,
Each road surface member 6 has a vertical plate 9 at the front end of the recess 16.
The front corner 1 of the recess 16 fits into the fitting part 11 of the recess 16.
The vertical surface of 6a is in contact with the inner surface of vertical plate 9. As a result, the upper surface horizontal portion 18 of the road surface member 6 substantially coincides with the road surface, and the front end portion of the road surface member 6 protrudes from the vertical plate 9 toward the clearance side to form a protruding portion 17 and protrudes from one of the vertical plates 9. Each protrusion 17,1
7, a protrusion 1 protruding from the other vertical plate 9 between...
7, 17,... are coming.

Further, the anchor bars 15 of the vertical plate 9, the anchor bars 19 of the road surface member 6, and the through bars 21 extending in the road width direction are connected at their intersections by welding or the like.

As the post-casting material 7, commonly used civil engineering materials that are poured and hardened, such as cement concrete, asphalt concrete, resin concrete, resin mortar, and synthetic resin, are used.

In the above road joint expansion/contraction device 1, the joint clearance 22 opened to the road surface has a wave shape, and the vehicle has a protrusion 17 protruding from one vertical plate 9.
Since the vehicle runs with its tires always in contact with the road surface toward the protrusion 17 protruding from the other vertical plate 9, the vehicle has good running performance. In addition, since the road surface member 6 is exposed to the road surface in the area where the backing material 7 is placed, vehicle tires often pass over the road surface member 6, which reduces wear on the backing material 7. . In addition, the vertical board 9, the road surface member 6, and the backing material 7
Since the boundary between the rear panel and the rear panel is corrugated in the road width direction, even if the rear panel 7 is slightly worn and a level difference occurs between the vertical plate 9 and the road surface member 6 and the rear panel 7, the vehicle running performance is greatly improved. There is no obstruction.

The interval S between each road surface member 6 is preferably narrower than the tire width of the vehicle (for example, about 100 mm) in order to prevent wear of the trailing material 7 and improve vehicle running performance.

In addition, like the road surface member 6 of this example, a recess 1 is provided at the lower part.
6, the trailing material 7 interposed in the recess 16 prevents the road surface member 6 from shifting forward, increasing the stability of the road surface member 6.

During construction, first, the main girder 2 is erected on the pier, and then the pair of supporting members 5, 5 shown in FIG. , the bottom plate 10 is connected to the upper flange 2a of the main girder 2 with bolts 20. After that, the slab concrete is poured with the edges of the slab cut out. Then, the road surface member 6 is fitted into each fitting portion 11 of the vertical plate 9, and the front corner portion 16a of the road surface member 6 is engaged with the corner formed by the bottom surface of the fitting portion 11 and the inner surface of the vertical plate 9. The road surface member 6 is positioned using the same steps and fixed by welding or the like. Then, each intersection of the anchor reinforcements 15, 19 and the through reinforcements 21 of the vertical board 9 and the road surface member 6 is connected, and the backing material 7 is placed on the back of the vertical board 9, and the bridge surface is paved. (Advanced construction method).

In the above-mentioned construction, since the vertical plate 9 serves as a template for casting the post-casting material 7, there is no need to provide a separate template, and the construction is easy. In addition, with conventional finger joints, the post-casting material does not wrap around the lower surface of the face plate easily, which tends to result in insufficient casting, but in the case of the present invention, since the road surface member 6 is vertically long, the road surface member 6 The backing material 7 from both sides is the road surface member 6
This will prevent insufficient pouring.

In addition, in the construction, first, the supporting members 5 are installed, and the floor slab is cast without a box, and then, before the road surface members 6 are installed, temporary filling material is filled into the box and the paving is started. There is a retrofitting method in which the pavement and temporary filling material above the box-cutting part is removed, and then the road surface members 6 are installed and the post-packing material 7 is cast, or the support members 5 and the road surface members 6 are first installed. It is possible to adopt a super-first construction method in which paving is applied after the floor slabs and post-padding materials have been installed and paved together.

Example 2 This example is shown in FIG. 4, and is an example in which the structure of the road surface member is different from Example 1.

That is, in the road joint expansion/contraction device 31 of this example, the road surface member 32 has a higher overall height than that of the first example, and has a horizontal portion 33 in the front half of the upper surface.
is formed, and an inclined part 34 that slopes downwardly toward the rear following the horizontal part 33 is formed in the rear half of the upper surface. An engaging portion 35 that opens downward is formed at the lower part of the front portion of the road surface member 32.
The opening width of No. 5 is matched to the thickness of the vertical plate 37 of the support member 36, and the road surface member 32 is fitted into the fitting part 38 opened upward of the vertical plate 37, and the engaging part 35 is fitted to the vertical plate 37. I'm stuck in 37. In addition, road surface member 3
A through hole 39 is formed in 2, and the backing material 7 is interposed in this through hole 39.

In addition, in FIG. 4, the same reference numerals as in the first embodiment are used for components that are substantially the same as those in the first embodiment. Regarding this symbol, the same applies to the following embodiments.

In the case of this example, even if the trailing material 7 is worn out, the road surface member 3
The sloped portion 34 of No. 2 is exposed, the tires of the vehicle smoothly transition from the sloped portion 34 to the horizontal portion 33, and good vehicle running performance is maintained for a long period of time. Further, even when a snowplow passes through a snowy area, the scraper only skims the top of the slope 34, so the road surface member 32 or the vertical plate 37 will not be damaged. Further, since the rear batting material 7 is interposed in the through hole 39 of the road surface member 32, the road surface member 32 and the rear batting material 7 are interposed in the through hole 39 of the road surface member 32.
It also has a high bonding power.

Example 3 This example is shown in FIG. 5, and is an example in which the structure of the road surface member is different from the previous example.

That is, in the road joint expansion/contraction device 41 of this example, the road surface member 42 is formed at the same height as the vertical plate 44 of the support member 43, and the lower surface is fixed to the bottom plate 45 of the support member 43. has the function of increasing the strength of the support member 43 similarly to the reinforcing plate 12 of the first embodiment.

Further, a horizontal portion 46 is formed on the upper surface of the road surface member 42, and the road surface member 42 further includes a through hole 47 through which the rear batting material 7 is inserted and an engaging portion 48 that engages with the vertical plate 44. It fits into the fitting part 49 of.

In this example, since the road surface member 42 has a function as a reinforcing plate, the number of parts is reduced and the mounting strength of the road surface member 42 is increased. Note that the road surface member 42 may be provided with an inclined portion 50 as shown by a chain line.

Example 4 This example is shown in FIG. 6, and is an example in which the arrangement method of road surface members is different from Example 1.

That is, in the road joint expansion/contraction device 51 of this example, the vertical plates 53 of the support member 52 have relatively narrow intervals.
A pair of fitting parts 54, 54 opened with S ₁
are arranged in the road width direction with a relatively wide interval S ₂ , and a road surface member 55 is fitted into each fitting portion 54 .

Next, other embodiments of the road surface member will be described based on FIGS. 7 to 15.

The road surface member 60 shown in FIG.
A horizontal portion 62 is formed following the taper 61 and extending rearward. The road surface member 60 of this example can be set by appropriately changing the protrusion length of the road surface member 60 into the gap at the construction site. The taper 61 as in this example may be attached to the road surface member shown in the previous embodiment or the road surface member described below.

The road surface member 65 shown in FIG. 8 has an L-shaped notch at its lower part to form a protruding part 66, and a horizontal part 67 is formed on its upper surface over its entire length. The road surface member 65 of this example is 1 as shown in FIG.
By cutting two pieces out of a single rectangular board, it is possible to cut the board without leaving any remaining material.

The road surface member 70 shown in FIG. 10 has a lower end of a protruding portion 71 at the front end extended downward longer than the road surface member 6 shown in FIG. 3, and a horizontal portion 72 is formed on the upper surface. When a wheel load acts on the protrusion 71, the road surface member 70 receives a force in a clockwise direction in the illustrated example using the bottom of the fitting part of the vertical plate as a fulcrum, but the part where the protrusion 71 is extended significantly downward Back side 73
will come into contact with the vertical plate, so the road surface member 70
The rear end is prevented from floating upwards, providing good stability.

A road surface member 75 shown in FIG. 11 has a rear end portion 76 that significantly protrudes downward, contrary to the road surface member 75 shown in FIG. 10, and a horizontal portion 77 is formed on the upper surface. In the case of this example, stability is good because the rear end portion 76 is deeply buried in the backing material 7. In addition, the rear end portion 7
6 may be fixed to the bottom plate of the support member.

The road surface member 80 shown in FIG. 12 has an L-shaped notch at the lower part and a protrusion 81 similar to the one shown in FIG.
is formed, and the upper surface has a horizontal part 82 on the front side and an inclined part 8 that slopes downwardly toward the rear following the horizontal part 82 on the rear side.
3 is formed. In this example, as shown in Fig. 13, by taking two pieces from a rectangular plate,
It is possible to perform board cutting with less residual material.

The road surface member 85 shown in FIG. 14 is equipped with a horizontal portion 86, an inclined portion 87, and an engaging portion 88 opening downward, similar to the road surface member 32 shown in FIG. 4, and anchor bars 19 are provided in place of the through holes 39 in FIG. Note that anchor bars may also be provided on the road surface member 32 shown in FIG. 4.

A road surface member 90 shown in FIG. 15 has a horizontal part 91 and an inclined part 92 formed on the upper surface, and a recessed part 93 formed in the lower part.

Next, a modification of the method (FIG. 5) in which the road surface member is fixed to the bottom plate of the support member to function as a reinforcing plate will be explained based on FIGS. 16 to 18.
Note that the same reference numerals as in FIG. 5 are used for the supporting members.

In the example shown in FIG. 16, a road surface member 101 is formed into an inverted L-shape and has a protruding portion 102 formed therein, a horizontal portion 104 is formed on the upper surface, and a vertical portion 10 extending downward is formed.
3 has its front and lower surfaces fixed to a vertical plate 44 and a bottom plate 45, respectively. Note that the front surface of the vertical portion 103 and the vertical plate 44 do not necessarily need to be fixed to each other.

In the example shown in FIG. 17, the lower end of the protrusion 106 of the road surface member 105 is extended below the bottom of the fitting portion 49 of the vertical plate 44 to form a locking portion 107, which is attached to the upper surface of the road surface member 105. A horizontal portion 108 is formed. Vertical section 109 is similar to that of FIG.

In the example shown in FIG. 18, the road surface member 110 is provided with a protruding portion 111 at the front end, a vertical portion 112 extending downward at the rear end, and the vertical portion 112 is provided at the rear end.
A communication hole 113 for interposing the post-beating material 7 is formed between the vertical plate 12 and the vertical plate 44, and a horizontal portion 114 is formed on the upper surface.

In addition, although some of the road surface members explained above do not have an inclined part, it goes without saying that an inclined part may be provided. If a sloped part is provided, the slope with respect to the horizontal part is 10 to 35 degrees, preferably 15 to 20 degrees.
degree. The slope portion may be sloped downward in a straight line, or may be sloped downward in a curve with a predetermined curvature.

Furthermore, in the above embodiments, the bottom plate of the support member is fixed to the main girder, but it may also be fixed to the steel deck plate of a steel deck bridge.

Incidentally, in the case of a diagonal bridge, the side surface (rising surface) of the fitting part of the vertical plate is diagonal to the longitudinal direction of the vertical plate,
The vertical board and the road surface member intersect diagonally. of course,
Even in the case of a straight bridge, the vertical plates and road surface members may intersect diagonally.

As described above, according to the present invention, a wave-shaped joint clearance can be formed by combining the vertical plate and the road surface member, and the boundary between the vertical plate and the road surface member and the rear impact material on the back thereof. becomes a waveform,
This improves vehicle running performance, and prevents wear of the backing material on the road surface member, maintaining good vehicle running performance over a long period of time.Furthermore, by providing a bottom plate on the support member, it is possible to improve vehicle running performance. The mounting strength is increased, and since the combination of the vertical plate and the road surface member forms a corrugated shape, the manufacturing cost is lower than that of conventional finger joints, which is an excellent effect.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a perspective view showing a road joint expansion and contraction device of Example 1 cut in the bridge length direction, FIG. 2 is a perspective view showing a support member of the same example, and FIG. Figure 3 is a perspective view showing the road surface member of the same example;
The figure is a sectional view cut in the bridge length direction showing the road joint expansion and contraction device of Example 2, FIG. 5 is a view similar to FIG. 4 in Example 3, and FIG. The plan view and FIGS. 7 to 15 respectively show other examples of road surface members.
10 to 12 are perspective views, FIG. 9 is a plan view showing an example of planking of the road surface member shown in FIG. 8, and FIG. 13 is a plan view showing an example of planing of the road surface member shown in FIG. , Figures 14 and 15 are side views;
6 to 18 are sectional views of essential parts showing embodiments of the type in which the road surface member is fixed to the bottom plate of the support member. 1, 31, 41, 51... road joint expansion and contraction device,
2...Main girder, 3...Playroom, 4...Floor slab, 5,3
6, 43, 52...Supporting member, 6, 32, 42,
55, 60, 65, 70, 75, 80, 85, 9
0,101,105,110...Road surface member, 7...
...Following material, 8...Pavement, 9,37,44,53...
...Vertical plate, 10,45...Bottom plate, 11,38,4
9, 54... Fitting portion.

Claims (1)

[Claims] 1. The bottom plates of a pair of support members each having a bottom plate at the lower end of the vertical plate are fixed to the ends of the main girders or steel deck plates that face each other across the clearance at the road joint, and the upper end of the vertical plate is close to the road surface. In addition, a plurality of fitting parts opening upward are formed on the vertical plate at intervals in the road width direction, and in these fitting parts, a road surface member with a horizontal part provided on the upper surface is placed horizontally. The front end of each road surface member is fitted in such a way that it is aligned with the road surface, and the front part is projected from the vertical board toward the clearance side. A road joint expansion/contraction device characterized in that the front end of the road surface member faces out, and a backing material is placed on the back of both vertical plates.