JP3579784B2 - Expansion joint for bridge and expansion limiting device used for the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an expansion joint for a bridge and an expansion restricting device used for the expansion joint.
[0002]
[Prior art]
As an expansion joint for bridges, for example, there is one as shown in FIG. 9. As shown in FIG. 9, the joint main body J has a groove 10 on the upper surface extending in a direction perpendicular to the bridge axis direction of the bridge H, An elastic strip 1 having a substantially constant thickness 10 and a groove 11 on the lower surface side; a reinforcing steel plate 2a embedded in an upper region between the grooves 10 in the elastic strip 1; and a groove in the elastic strip 1 11, a reinforcing steel plate 2b buried in the lower region on both the left and right sides, and an elastic band-shaped portion between the adjacent grooves 10 and 11 serves as a shear deformation portion 12.
[0003]
In this expansion joint, as shown in FIG. 9, the joint main body J is installed in such a manner that each reinforcing steel plate 2b is fixed to each bridge H by an anchor bolt AB, and expansion and contraction of the bridge H due to a change in environmental temperature or the like is sheared. It is absorbed by the deformation of the deformation part 12.
[0004]
However, this expansion joint cannot absorb the separation between the large bridges H and H when an abnormality (earthquake) occurs.
[0005]
Therefore, in recent years, an expansion joint for a bridge as shown in FIG. 10 has been proposed to absorb a large separation between the bridges H, H.
[0006]
In this expansion joint for bridges, as shown in FIG. 10, one end of the receiving plate 3 is embedded in the end surface of each bridge H, and the receiving plate 3 is moved within a certain range when a tensile force acts on the other end of the receiving plate 3. The joint body J is bolted or the like in such a manner as to be mounted on the receiving plate 3 protruding from the bridge H. In addition, in this expansion joint, when the large bridges H and H are separated from each other, the joint body J is prevented from being in an excessively extended state, thereby making it impossible to safely support the vehicle. Are connected by a slack chain or the like.
[0007]
However, this expansion joint for bridges has the following problems.
{Circle around (1)} The fixing of heavy chains to the receiving plates 3 and 3 is performed locally, which is troublesome.
(2) A heavy chain or the like is suspended, and there is a danger of causing a fall accident.
(3) The presence of a chain or the like may cause noise due to vibration and wind force.
[0008]
Therefore, in the industry using this type of expansion joint, there is a demand for the development of an expansion joint for bridges that is easy to construct and does not require a component that may cause a fall accident or noise.
[0009]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide an expansion joint for a bridge that can sufficiently absorb a large separation between bridges, is easy to construct, and does not require a component that may cause a fall accident or noise. Further, it is another object of the present invention to provide an expansion limiting device which is easy to construct and has almost no possibility of causing a fall accident or noise.
[0010]
[Means for Solving the Problems]
(Invention of claim 1)
According to the present invention, a horizontal receiving plate is buried in each end face of an opposing bridge so as to be able to be pulled out by a fixed amount, and a joint body that expands and contracts due to rubber elasticity is bridged between receiving plate portions protruding from each bridge. An expansion joint for a bridge, which is fixed by bolts and fixed or bolted by spanning an expansion restricting device, wherein the expansion restricting device is configured such that each end of a high-tensile sheet material or a high-tensile line is attached to a mounting plate. Along with being fixed, the mounting plate is fixed or bolted to the receiving plate, and the high-tensile sheet material or the high-tensile line is in a slack state at a normal distance between bridges. When the high-tensile sheet material or the high-tensile line is in a tensioned state between the opposing bridges, elongation of the joint body is prevented.
(Invention of claim 2)
The expansion joint for a bridge according to the present invention relates to the invention described in the first aspect, wherein the mounting plate of the expansion restricting device is jointly fastened by bolts in a manner of being sandwiched between the receiving plate and the joint main body.
(Invention of claim 3)
The expansion joint for a bridge according to the present invention relates to the invention according to claim 1 or 2, wherein the mounting plate is formed of a high-tensile sheet material or two plates that sandwich each end of the high-tensile wire. The plate members and the plate member and the high-tensile sheet member or the high-tensile line are in a fixed state.
(Invention of Claim 4)
An expansion joint for a bridge according to the present invention relates to the invention described in claim 1 or 2, wherein the expansion limiting device flattens a high-tensile sheet material or a high-tensile line formed in a loop shape and sets the high-tensile sheet. A mounting plate is inserted into one end and the other end of the flat loop of the material or the high tension wire, and the mounting plate and the high tension sheet material or the high tension wire are fixed.
(Invention of claim 5)
The expansion joint for bridges according to the present invention relates to the invention described in claim 1 or 2, wherein the expansion limiting device is configured by fixing each end of a high-tensile sheet material or a high-tensile wire to one surface of a mounting plate. The surface of the mounting plate to which the high-tensile sheet material or the high-tensile wire is fixed is the fixing surface to the receiving plate.
(Invention of claim 6)
According to the present invention, a horizontal receiving plate is buried in each end face of an opposing bridge so as to be able to be drawn out by a fixed amount, and a joint body that expands and contracts due to elasticity of rubber is bridged between receiving plate portions protruding from each bridge. An expansion limiting device used for an expansion joint for bridges, wherein each end of a high-tensile sheet material or a high-tensile wire is fixed to a mounting plate, and one of the mounting plates is In the receiving plate, the other mounting plate is fixed or bolted to the other receiving plate, respectively, and at a normal distance between bridges, the high-tensile sheet material or the high-tensile line is in a loosened state. When the high-tensile sheet material or the high-tensile line is in a tensioned state between the opposing bridges, the extension of the joint body is prevented.
(Invention of claim 7)
The expansion limiting device according to the present invention relates to the invention according to claim 6, wherein the mounting plate is formed of a high-tensile sheet material or two plates that sandwich each end of the high-tensile wire. The plate material and the high tension sheet material or high tension wire are in a fixed state.
(Invention of claim 8)
An expansion limiting device according to the present invention relates to the invention according to claim 6, wherein the high-tensile sheet material or the high-tensile line formed in a loop shape is flattened, and the high-tensile sheet material or the high-tensile line is flattened. A mounting plate is inserted into one end side and the other end side of the loop, respectively, and the mounting plate and a high-tensile sheet material or a high-tensile wire are fixed.
(Invention of claim 9)
The expansion limiting device according to the present invention relates to the sixth aspect of the present invention, wherein each end of the high tension sheet material or the high tension wire is fixed to one surface of the mounting plate.
[0011]
The functions of the expansion joint for bridges of the present invention and the expansion restricting device used therein will be described in the following embodiments of the present invention.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an expansion joint for a bridge according to an embodiment of the present invention and an expansion limiting device used for the same will be described in detail with reference to the drawings.
[Embodiment 1]
In the expansion joint for bridges of this embodiment, as shown in FIGS. 1 and 3, a horizontal receiving plate 3 is buried in each end face of the opposing bridges H, H so as to be able to be drawn out by a fixed amount, and each bridge H The joint body J is provided between the receiving plate portions 3 and 3 projecting from the base plate, and the extension limiting device 4 is jointly fastened with bolts B at the portion where the receiving plate 3 and the joint body J overlap. .
(About mounting the receiving plate 3 on the end face of the bridge H)
As shown in FIGS. 1 to 3, the receiving plate 3 is made of a steel plate having a plurality of long holes 30 on a side embedded in the bridge H, and the receiving plate 3 is attached to an end surface of the bridge H. The bolt AB embedded in the bridge H is inserted into the elongated hole 30.
(About fitting body J)
As shown in FIG. 1, the joint main body J includes an elastic band-like body 1 having a substantially constant thickness and having grooves 10 and 10 on the upper surface side and grooves 11 on the lower surface side extending in a direction perpendicular to the bridge axis direction of the bridge H. A reinforcing steel plate 2a buried in the upper region between the grooves 10, 10 in the elastic band 1 and reinforcing steel plates 2b buried in lower regions on both left and right sides of the groove 11 in the elastic band 1. In addition, the elastic band portion between the adjacent grooves 10 and 11 is defined as a shear deformation portion 12. In this joint body J, as shown in FIG. 3, bolt insertion holes 13 are formed near both edges of the elastic band-shaped body 1, and a reinforcing steel plate 2b corresponding to the bolt insertion holes 13 is formed. Further, a through hole h1 is provided in a rubber material portion on the lower surface thereof.
[0013]
The elastic strip 1 has a thick wall that is long in a direction perpendicular to the bridge axis direction, and is made of a rubber material (for example, chloroprene rubber) having excellent weather resistance and wear resistance.
(About expansion restriction device 4)
As shown in FIG. 4, the expansion restricting device 4 includes a high-tensile sheet material 40 and mounting plates 41 fixed to the ends of the high-tensile sheet material 40, respectively. Each end of the high-strength sheet material 40 is sandwiched between two plates 41a, 41a constituting the mounting plate 41, and the plates 41a, 41a and the plate 41a and the high-tensile sheet 40 are bonded to each other with an adhesive or the like. It is formed so as to be fixed. The mounting plate 41 has a through hole h2 for inserting the holt B.
[0014]
Here, the high-tensile sheet material 40 is formed by weaving a high-tensile wire made of any one of glass fibers, carbon fibers, polymer fibers such as aramid fibers and nylon fibers, iron-based wires, and stainless-based wires. There is as a fabric.
(About the aspect in which the joint body J and the expansion restricting device 4 are erected and fixed between the receiving plates 3 and 3 projecting from the bridges H and H)
As shown in FIG. 3, the joint body J and the expansion restricting device 4 are such that the bolts B inserted from the bolt insertion holes 13 of the joint body J are inserted into the through holes h1 and h2 and screwed into the receiving plate 3. Fixed.
(About the function of expansion joints for bridges against changes in environmental temperature)
The bridges H, H mutually approach and separate from each other as the environmental temperature changes, but the approach and separation of the bridges H, H mutually are absorbed by the shear deformation of the shear deformation portion 12 and the expansion and contraction of the grooves 10, 10. .
(About the function of expansion joints for bridges against large vibrations such as earthquakes)
When the bridges H and H are largely separated from each other, the high-tensile sheet material 40 that has been loosened with the elongation of the joint body J becomes in a tensioned state as shown in FIG. 5, and further elongation of the joint body J is prevented. Then, when the separation between the bridges H and H is even greater than this, the receiving plate 3 is pulled out from the bridge H as shown in FIG. Therefore, in this expansion joint for bridges, as is clear from FIG. 6, even when the distance between the bridges H, H is greatly increased, the bridge can be sufficiently absorbed, and the vehicle can pass safely.
[0015]
In addition, since the expansion limiting device 4 having the same function as the chain described in the section of the prior art is configured to be fastened together with the receiving plate 3 and the joint body J via the bolt B, the components such as the chain are locally installed. Need not be welded.
[0016]
Further, the high-tensile sheet material 40 is a woven fabric formed by weaving a high-tensile wire made of any of polymer fibers such as glass fiber, carbon fiber, aramid fiber and nylon fiber, iron-based wire, and stainless-based wire. Therefore, the danger of causing a fall accident and noise is extremely low.
[0017]
When the bridges H and H come close to each other, the joint main body J contracts and deforms in substantially the same manner as when the bridges H and H are directly laid directly between the bridges H and H.
[Embodiment 2]
In the expansion joint for a bridge of this embodiment, as shown in FIG. 7, the end of the receiving plate 3 is projected to the area of the groove 11 of the joint body J, and the partial upper surface of the receiving plate 3 is projected to the area of the groove 11 of the receiving plate. The mounting plate 41 is fixed (or bolted or both).
[0018]
That is, the receiving plates 3 in a horizontal state are buried in the respective end faces of the facing bridges H and H so as to be able to be pulled out by a fixed amount, and the joint body J is stretched between the receiving plates 3 protruding from the respective bridges H. The same operation and effect as those of the first embodiment can be obtained as long as the expansion restricting device 4 is bolted and the expansion restricting device 4 is hung and fixed or bolted.
[Other Embodiments of Extension Limiting Device 4]
The expansion restricting device 4 is not limited to the one described in the first embodiment. As shown in FIG. 8, the expansion restricting device 4 includes a high-tensile sheet material 40 formed in a flat loop, The high-strength sheet material 40 and the mounting plate 41 may be formed by attaching the mounting plate 41 to one end and the other end of the flat loop of the sheet material 40, respectively. Good. When this expansion limiting device 4 is used, the tensile strength is almost double that of the first embodiment.
[0019]
Further, the expansion limiting device 4 is not limited to the above-described first embodiment. The expansion limiting device 4 may be formed by fixing the end of the high-strength sheet material 40 to one surface of the mounting plate 41. It is also possible. In this case, it is preferable that the surface of the mounting plate 41 to which the high-tensile sheet material 40 is fixed is fixed to the upper surface of the receiving plate 3 with an adhesive or the like.
[0020]
Further, the expansion restricting device 4 is not limited to the one in the first embodiment, and may adopt a mode in which a plurality of high tension wires are fixed to the mounting plate 41 in parallel. As the high tension wire, glass fiber, carbon fiber, polymer fiber such as aramid fiber or nylon fiber, iron wire, stainless steel wire, or the like can be used.
[Other Embodiments of Joint Body J]
The joint body J of the first embodiment is merely an example, and any joint body J that can expand and contract in the bridge axis direction and is fixed to the receiving plate 3 by bolts B can be used.
[0021]
【The invention's effect】
As is clear from the contents of the embodiments of the present invention, for bridges that can sufficiently absorb a large separation between bridges, are easy to construct, and do not require components that may cause a fall accident or noise. An expansion joint can be provided, and further, an expansion limiting device which is easy to construct and has almost no possibility of causing a fall accident or noise can be provided.
[Brief description of the drawings]
FIG. 1 is a sectional view of a bridge expansion joint according to a first embodiment of the present invention.
FIG. 2 is a plan view of the expansion joint for a bridge.
FIG. 3 is a partially enlarged view of the bridge expansion joint.
FIG. 4 is a front view of an expansion restricting device constituting the bridge expansion joint.
FIG. 5 is a sectional view showing a state of a bridge expansion joint when opposing bridges are separated from each other.
FIG. 6 is a cross-sectional view showing a state of the expansion joint for bridges when bridges facing each other further than the state of FIG. 5 are separated from each other;
FIG. 7 is a cross-sectional view of a bridge expansion joint according to a second embodiment of the present invention.
FIG. 8 is a front view of an expansion limiting device according to another embodiment.
FIG. 9 is a cross-sectional view of a prior art expansion joint for a bridge.
FIG. 10 is a cross-sectional view of a prior art expansion joint for bridges.
[Explanation of symbols]
B Bolt H Bridge J Joint body 3 Receiving plate 4 Expansion limiting device 40 High tensile sheet material 41 Mounting plate

Claims (9)

A horizontal receiving plate is buried in each end face of the opposing bridge so as to be able to be pulled out by a fixed amount, and a joint body that expands and contracts due to rubber elasticity is stretched between the receiving plate portions protruding from each bridge and bolted. And an expansion joint for a bridge, which is fixed or bolted by extending the expansion restriction device together with the expansion restriction device, wherein each end of the high tension sheet material or the high tension wire is fixed by a mounting plate. And the mounting plate is fixed or bolted to the receiving plate, and the high-tensile sheet material or the high-tensile line is in a slack state at a normal distance between the bridges. An expansion joint for a bridge, characterized in that the expansion of the joint body is prevented when the high tension sheet material or the high tension wire is in a tensioned state due to the expansion. 2. The expansion joint for a bridge according to claim 1, wherein the mounting plate of the expansion restricting device is jointly fastened by bolts in a manner sandwiched between the receiving plate and the joint body. The mounting plate is composed of two high-strength sheet materials or two plates that sandwich each end of the high-tensile wire, and the plate materials are mutually fixed, and the high-tensile sheet material or the high-tensile wire is fixed to each other. The expansion joint for a bridge according to claim 1 or 2, wherein: The expansion restricting device flattens the high-tensile sheet material or the high-tensile line formed in a loop shape, and at the one end side and the other end side in the flat-shaped loop of the high-tensile sheet material or the high-tensile line, respectively. The expansion joint for a bridge according to claim 1 or 2, wherein the mounting plate is inserted, and the mounting plate and the high-tensile sheet material or the high-tensile wire are fixed. The expansion restricting device is configured such that each end of the high-tensile sheet material or the high-tensile line is fixed to one surface of the mounting plate, and the surface of the mounting plate to which the high-tensile sheet material or the high-tensile line is fixed is a receiving plate. The expansion joint for a bridge according to claim 1 or 2, wherein the expansion joint is a fixing surface. Each bridge has a horizontal support plate that can be pulled out by a fixed amount on each end face of the opposite bridge so that it can be pulled out, and a joint body that expands and contracts due to the elasticity of rubber between the support plates protruding from each bridge. An expansion limiting device used for a joint, wherein each end of a high-tensile sheet material or a high-tensile wire is fixed to a mounting plate, and one mounting plate is attached to one receiving plate. , The other mounting plate is fixed or bolted to the other receiving plate, respectively, and the high-tensile sheet material or the high-tensile line is in a slackened state at a normal distance between the bridges. An expansion restricting device, characterized in that when a high tension sheet material or a high tension line is in a state of tension due to expansion between bridges, extension of the joint body is prevented. The mounting plate is composed of two high-strength sheet materials or two plates that sandwich each end of the high-tensile wire, and the plate materials are mutually fixed, and the high-tensile sheet material or the high-tensile wire is fixed to each other. 7. The expansion restricting device according to claim 6, wherein: The high-tensile sheet material or the high-tensile line formed in a loop shape is flattened, and mounting plates are inserted through one end and the other end of the flat-shaped loop of the high-tensile sheet material or the high-tensile line, respectively. 7. The expansion restricting device according to claim 6, wherein said mounting plate and a high-tensile sheet material or a high-tensile wire are fixedly attached. 7. The expansion restricting device according to claim 6, wherein each end of the high tension sheet material or the high tension wire is fixed to one surface of the mounting plate.

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