JP2635930B2 - Construction method of joint structure of road bridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a joint structure of a road bridge.

[0002]

2. Description of the Related Art As a joint structure of a road bridge, a pair of corrugated vertical plates which are bent in a zigzag manner and extend in the longitudinal direction of the joint are erected so that a concave portion and a convex portion of the joint face each other at the joint portion. A corrugated space extending in the longitudinal direction of the joint by bending in a zigzag manner is formed, and concrete is formed on the back of both corrugated vertical plates to form a concavo-convex concrete plate. -513
No. 24). In this case, the height of the corrugated vertical plate is formed to be about 15 cm to the road surface, and therefore, the thickness of the concrete uneven plate on the back thereof is comparable to the height of the corrugated vertical plate.

In recent years, a road bridge having a thicker slab has been constructed to cope with an increase in the number of vehicles having a large load, or a thicker slab of an existing road bridge has been constructed. Since a vehicle with a large load travels on a road bridge having a thick floor slab and a large load-bearing strength as described above, even in the joint structure of the road bridge as described above, a concrete uneven plate with a corrugated vertical plate is further added. It is necessary to increase the load carrying strength by increasing the thickness.

[0004] On the other hand, as a joint structure of a steel bridge,
As described in JP-B-57-25568, a tall corrugated vertical plate rising from the upper surface of the steel girder to the road surface is formed, and the bottom plate at the lower end of the corrugated vertical plate is connected to the steel girder by high-strength bolts. There is a proposal to do so. According to this,
A concrete uneven plate having a high load-bearing strength can be formed on the back of the corrugated vertical plate.

Further, Japanese Patent Publication No. 60-17883 discloses a proposal in which an upper corrugated vertical plate and a lower corrugated vertical plate are partially overlapped and welded to each other to form a tall corrugated vertical plate. Have been described.

[0006]

However, among the above-mentioned prior arts, in the case of a method in which a bottom plate is fixed to a steel girder and a corrugated vertical plate is set up, a tall corrugated vertical plate equivalent to the thickness of a floor slab is used as a flat plate. It is necessary to manufacture by bending, but this is difficult and the manufacturing cost increases. Moreover, there is a problem that it is difficult to adjust the upper end of the corrugated vertical plate to the road surface height.

That is, the thickness of the floor slab of the road bridge is not formed to be constant over the entire length of the road width. For example, the center portion of the width is thick and both ends are thin in order to create a cross slope on the road surface. Also, when concrete is cast, it may become slightly thicker or thinner than the design thickness, and the camber of the girder does not return as designed and the height of the end of the floor slab goes wrong There is. Therefore, it is necessary to manufacture the corrugated vertical plates each time according to the thickness of the floor slab of each road joint, and it is necessary to prepare a large number of corrugated vertical plates having different heights. In addition, it is actually difficult to adjust the upper end of the corrugated vertical plate to the road surface height, and if the upper end of the corrugated vertical plate is higher than the road surface, the traveling performance of the vehicle becomes extremely poor.

Further, in the case where a rubber sealing material is bonded by baking to the opposing inner surfaces of the pair of corrugated vertical plates, for example, both corrugated vertical plates are fixed in a vulcanizing mold, and the unvulcanized rubber material is subjected to both corrugated rubber plates. Heating and pressurization is applied to the vertical plate, but since the corrugated vertical plate is tall, it is necessary to manufacture a large die, and the cost of baking the sealing material increases.

On the other hand, in the case of the above-mentioned prior art in which the upper corrugated vertical plate and the lower corrugated vertical plate are partially overlapped, it is not necessary to make the upper and lower corrugated vertical plates tall. In addition, the manufacturing difficulty is reduced, and the total height can be adjusted by changing the amount of superposition of the upper and lower corrugated vertical plates. However, there is a problem that it is difficult to overlap the upper and lower corrugated vertical plates without gaps. .

That is, in order to perform such superposition, it is necessary to adjust the pitch of the waves of the upper and lower corrugated vertical plates so that they can be superposed, and it is necessary to increase the dimensional accuracy thereof. However, it is extremely difficult to actually produce such a corrugated vertical plate, and it is often impossible to perform the desired superposition. When the road surface has a cross slope, the upper corrugated vertical plate needs to be slightly inclined according to the gradient of the road surface, which means that the upper corrugated vertical plate is arranged substantially horizontally. , Which also makes it difficult to overlap the upper and lower corrugated vertical plates. Further, when the upper corrugated vertical plate and the lower corrugated vertical plate are overlapped, it is necessary to make the height of each corrugated vertical plate extra high for the overlapping.

Further, if an existing joint member is damaged and is replaced with the above-mentioned corrugated joint member, the same problem occurs.

Accordingly, the present invention provides a joint structure having a large load-bearing strength and excellent manufacturability and workability of a member, and a method of constructing the joint structure.

[0013]

SUMMARY OF THE INVENTION The present invention provides
For such a problem, the upper corrugated vertical plate and the lower corrugated vertical plate do not necessarily have to be overlapped, and even if simple welding is performed by butting up and down, there is no difference in load carrying strength. The present inventors have found that the production cost of the member can be reduced and the construction can be facilitated, and the present invention has been completed. That is, the present invention
A pair of upper corrugated vertical plates bent zigzag;
A pair of lower waves bent in a zigzag like a corrugated vertical plate
Vertical plate, and a pair of L-shaped vertical plate and horizontal plate
An L-shaped plate is prepared, and the lower end of the lower corrugated vertical plate is
The lower surface covers the lower surface of the back portion of the convex portion for each convex portion and the lower surface corresponds to the lower portion.
Bottom formed to be flush with the back of the concave part of the corrugated vertical plate
The board is fixed and there is no play space at the seam of the road bridge.
The opposite road edge so that the upper surface of the steel girder end is exposed.
Cut out to form a notch step,
The upper corrugated plate and the pair of lower corrugated plates are flush with each other.
In the state of being connected upside down
Place the pair of corrugated vertical plates at the seam of the above road bridge
So that the concave and convex portions face each other in the bridge length direction.
And the upper end is arranged to match the road surface height,
The vertical plate of the L-shaped plate is placed on the back of the concave portion of the vertical plate and the back of the bottom plate.
And the horizontal plate portion of the L-shaped plate is
Fixed on the upper surface, on the back of the connected upper and lower corrugated vertical plate
Road bridge joints characterized by casting concrete
It is a method of constructing a part structure.

According to the present invention,
The lower corrugated vertical plate fits the upper end of the upper corrugated vertical plate to the road surface height.
So that the L-shaped plate is joined to the lower corrugated vertical plate
The upper edge of the upper corrugated vertical plate to the road surface height
It becomes easier. That is, the L-shape previously fixed to the steel girder
After connecting the plate and the lower corrugated vertical plate,
When connecting the corrugated vertical plates, the L-shaped plate and the lower
Unless the joining position with the corrugated vertical plate is strictly adjusted, the upper part
Although the upper end of the corrugated vertical plate no longer matches the road surface, the present invention
Then, such inconvenience would be eliminated.

The upper and lower corrugated vertical plates are arranged flush with each other.
Therefore, the concrete plate behind these corrugated vertical plates
A concrete plate formed on the back of a single corrugated vertical plate
There is virtually no change, and the load bearing strength is also high.
You. Also, it is necessary to overlap the upper and lower corrugated
There are no vertical corrugations.
Can be manufactured easily,
It is not necessary to strictly adjust the pitch of the waves
Becomes easier.

A bottom plate is provided for each projection of the lower corrugated vertical plate.
The bottom plates of adjacent protrusions are not continuous
Therefore, the bottom plate can be easily manufactured. In other words, adjacent convex portions
If a continuous bottom plate is used, the bottom plate
Similar to the wavy shape of the vertical plate, it is bent in a zigzag and
It is necessary to form a difficult corrugated side surface that extends in the direction
However, this is not necessary in the case of the invention, and the production of the bottom plate is
Becomes easier. Further, the bottom plate continuous between the adjacent convex portions described above.
In the case of, the gap between the L-shaped plate and the lower corrugated plate
The lower corrugated vertical plate is separated from the L-shaped plate by the distance.
Overhang and disadvantageous in load bearing strength
However, according to the present invention, this is solved.

Furthermore, the back of the concave portion of the lower corrugated vertical plate and
The vertical plate of the L-shaped plate is joined to the back of the bottom plate and the bottom of the L-shaped plate.
Since the plate is joined to the steel girder, the lower corrugated vertical plate is
And is firmly supported by the steel girder via the L-shaped plate.
In particular, the back of the concave portion of the lower corrugated vertical plate and the vertical plate portion of the L-shaped plate
Because it is directly connected, the lower corrugated vertical plate is L-shaped.
Support strength is high. Moreover, the lower wavy vertical
The contact between the back of the concave portion of the plate and the back of the bottom plate and the vertical plate of the L-shaped plate
Adjust the height of the upper corrugated vertical plate by adjusting the joint position.
The upper end of the upper corrugated vertical plate is aligned with the road surface.
It becomes easy to make it.

Here, the upper corrugated vertical plate and the lower corrugated vertical plate
Are arranged so as to be flush with each other, but the present invention
Those requiring both corrugated vertical plates to be completely flush
Rather, it is sufficient to arrange them so that they are almost flush.
And the connection of the upper and lower corrugated vertical plates
Only partial welding (point welding) is required.

The wave shape of the corrugated vertical plate will be described later.
The present invention is not limited to the trapezoidal wave shape as in
Adopt various shapes such as re-wave shape and sine curve shape
Can be. In addition, the seam of the road bridge is a road bridge and a road bridge.
In addition to the seam part, the seam part between the road bridge and the abutment is included. Ma
In addition, road bridges are not limited to steel bridges.
Trest concrete girder bridge and reinforced concrete
Includes concrete bridges such as girder bridges.

[0020]

Therefore, according to the present invention, a pair of upper corrugated vertical plates, a pair of lower corrugated vertical plates, and a pair of L-shaped plates are prepared, and a bottom plate is fixed to a lower end of the lower corrugated vertical plates. A notch step is formed at the joint of the road bridge, and the pair of upper corrugated vertical plates and the pair of lower corrugated vertical plates are connected to each other. At the seam portion of the bridge, the concave and convex portions of the bridge are arranged so as to face each other in the bridge length direction and the upper end thereof matches the road surface height. And the horizontal plate portion of the L-shaped plate was fixed to the upper surface of the steel girder, and concrete was cast on the back of the connected upper and lower corrugated vertical plates. Manufactured with a height shorter than that of the method of stacking corrugated vertical plates and requiring no high dimensional accuracy While using readily waveform vertical plate,
It is possible to form a concrete slab with high load-bearing strength similar to the case of providing a conventional tall corrugated vertical plate,
In addition, the effect that the height of the upper corrugated vertical plate can be easily adjusted is obtained, and the load resistance of the concrete slab is increased while facilitating the manufacture of the bottom member including the bottom plate and the L-shaped plate. And the transportation of such materials is also facilitated.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

-Structure- In FIG. 1, 1 is an upper corrugated vertical plate, 2 is a lower corrugated vertical plate,
Reference numeral 3 denotes a steel girder, 4 denotes a concrete floor slab, and a wavy gap 6 is formed by a gap between a pair of upper corrugated vertical plates 1 and 1 and a gap between a pair of lower corrugated vertical plates 2 and 2. Concrete is cast on the back of the upper corrugated vertical plates 1 and 1 and the lower corrugated vertical plates 2 and 2 to form concrete uneven plates 9 and 9.

More specifically, the upper corrugated vertical plates 1 and 1 are bent in a zigzag manner as shown in FIG. 2 to extend in the longitudinal direction of the seam of the road bridge, and the concave portions and the convex portions are opposed to each other. The wave gap 6 is thus formed. As shown in FIG. 3, the lower corrugated vertical plates 2 and 2 are also bent in a zigzag manner like the upper corrugated vertical plates 1 and 1 and extend in the longitudinal direction of the seam. The wavy gap 6 is thus formed.

That is, the upper and lower corrugated vertical plates 1 and 2 are arranged so as to be flush with each other, and the lower end of the upper corrugated vertical plate 1 and the upper end of the lower corrugated vertical plate 2 are butted up and down. Partially spot-welded (at multiple locations in the seam longitudinal direction). The abutment is located lower than the pavement. Anchors 12 are protrudingly provided on the back surfaces of the upper and lower corrugated vertical plates 1 and 2, and the anchors 12 are embedded in the concrete uneven plate 9. Further, the lower corrugated vertical plate 2 has a bottom plate 5 formed so as to cover a lower surface of a back portion of each convex portion and to have a back surface flush with a back surface of a concave portion of the lower corrugated vertical plate 2 for each convex portion. Has been fixed.

On the back surface of the concave portion of the lower corrugated vertical plate 2 and on the back surface of the bottom plate 5, an L-shaped vertical plate portion 14a and a horizontal plate portion 14b are connected in an L-shape and extend linearly continuously in the longitudinal direction of the joint. The vertical plate portion 14 a of the plate 14 is joined so as to extend over the back surface of the concave portion and the back surface of the bottom plate 5. The horizontal plate portion 14b of the L-shaped plate 14 is connected to the upper flange of the steel girder 3 by a high-strength bolt.

The concrete concavo-convex plate 9 has an end face formed by the upper and lower corrugated vertical plates 1 and 2 to have irregularities.

A sealing member 17 made of rubber is interposed between the corrugated gaps 6 of the upper corrugated vertical plates 1, 1, and both sides of the sealing material 17 are provided on inner surfaces of the upper corrugated vertical plates 1, 1. It is baked and adhered. A filler 18 made of sand, liquid rubber, or the like is packed inside the sealant 17. Note that the sealing of the wavy gap 6 is performed only by pouring the liquid sealing rubber in place of the sealing material 17, or a sponge-like elastic body having a rectangular cross section is attached to the inner surface of the upper corrugated vertical plates 1, 1. You may make it seal. In FIG. 1, reference numeral 15 denotes a through bar extending in the longitudinal direction of the joint, and 19 denotes a pavement of the concrete floor slab 4.

-Construction method-The construction method of the joint structure will be described with an example in which a damaged existing joint member is replaced with the joint member of the above embodiment.

First, upper and lower corrugated vertical plates 1 and 1 on which the concave and convex portions are combined so that they face each other, the seal material 17 is baked and adhered, and the anchor 12 is projected, and the bottom plate 5
Are prepared and the lower corrugated vertical plates 2 and 2 on which the anchors 12 are provided are provided. The upper and lower corrugated vertical plates 1 and 2 are connected in such a manner that the upper and lower corrugated vertical plates 1 and 2 are flush with each other. This connection may be performed at a factory or at a construction site.

At the construction site, the concrete parts on both sides of the existing joint members are cut off, the existing joint members are removed, and the upper surface of the end of the steel girder 3 is placed on both sides of the steel girder gap. An exposed notch step is formed. Then, the L-shaped plate 14,
Put 14 in.

The connected upper corrugated vertical plates 1 and 1 and lower corrugated vertical plates 2 and 2 are arranged at the center between the cutout steps. The two connecting corrugated vertical plates are temporarily attached to the lower surface of the hanging rod, and both ends of the hanging rod are supported on the upper surfaces of the pavements 19, 19, and the hanging rod is cut out by the notch. The upper end of the upper corrugated vertical plates 1 and 1 is adapted to the road surface height by being installed on the step portion.

The vertical plate portion 14a of the L-shaped plate 14 is joined to the back surface of the concave portion of the lower corrugated vertical plate 2 and the back surface of the bottom plate 5, and the horizontal plate portion 14b of the L-shaped plate 14 is connected to the steel beam 3 To the upper surface of the upper flange. Then, concrete is cast on the back of the upper and lower corrugated vertical plates 1 and 2 to form the concavo-convex concrete plate 9.

When a new road bridge is to be constructed, a formwork is arranged so that the cutout steps are formed at the road joints, floor concrete is poured, and furthermore, the concrete is placed on the floor concrete. Then, the pavement 19 is applied in series on the formwork. Then, a cut is made in the longitudinal direction of the seam with a concrete cutter on the pavement on both sides of the formwork, the pavement on the padding is crushed and removed by a concrete crusher, and the formwork is further removed. Form a part. Subsequent steps are the same as the case of replacing the existing joint member described above.

Further, in the above embodiment, the concrete uneven plate 9 has a single layer, but may have a two-layer structure of an upper layer and a lower layer as required.

[Brief description of the drawings]

FIG. 1 is a sectional view of a joint structure of a road bridge.

FIG. 2 is a plan view of an upper corrugated vertical plate and its anchor.

FIG. 3 is a plan view of a lower corrugated vertical plate and an L-shaped plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper corrugated vertical plate 2 Lower corrugated vertical plate 3 Steel girder 4 Floor slab 5 Bottom plate 6 Corrugated play 9 Concrete uneven plate 12 Anchor 14 L-shaped plate 14a Vertical plate portion 14b Horizontal plate portion 17 Rubber seal material 19 Pavement

Claims (1)

(57) [Claims] 1. A pair of upper portions each formed by zigzag bending
The corrugated vertical plate and the upper corrugated vertical plate are bent in a zigzag like
The pair of lower corrugated vertical plates, and the vertical plate and the horizontal plate are L-shaped
A pair of L-shaped plates connected in the shape of
At the lower end of the vertical plate, cover the lower surface of the back of each convex
And the back surface is flush with the back surface of the concave portion of the lower corrugated vertical plate.
The bottom plate formed as above is fixed, and at the seam of the road bridge, there is a gap between the opposite road ends.
By cutting off the upper part of the end of the steel girder.
A pair of upper corrugated vertical plates and a pair of lower corrugated vertical plates.
Butted up and down so that they are flush with each other
Then, this pair of connected corrugated vertical plates is
Part, the concave and convex parts face each other in the bridge length direction.
So that the upper end of the lower corrugated vertical plate and the lower surface of the bottom plate
The vertical plate of the L-shaped plate is joined, and the horizontal plate of the L-shaped plate is joined.
Is fixed to the upper surface of the steel girder, and concrete is placed on the back of the connected upper and lower corrugated vertical plates.
Construction method of joint structure of road bridge characterized by casting
Law .