JP2000073306A - Expansion joint for bridge and expansion limiting device used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion joint for a bridge that can sufficiently absorb large separation between bridges while facilitating work execution and dispensing with a constituent member with the possibility of causing a fall accident or noise, and to provide an expansion limiting device facilitating work execution and hardly having the possibility of causing the fall accident or noise. SOLUTION: Receiving plates 3 in the horizontal state are respectively embedded in the respective end faces of opposed bridges H, H so as to be able to be pulled out by the fixed quantity. A joint body J is suspended between the receiving plate 3 parts protruded from the respective bridges H, and fastened by bolts to form an expansion joint for a bridge. In an expansion limiting device 4, each end of high tension sheet material 40 or a high tension wire is supported by a fitting plate 41 which is a part to be fastened or bolt-fastened to the receiving plate 3, and the high tension sheet material 40 or high tension wire is in a loosened state at the time of normal distance between the bridges H, H. In the expansion limiting device 4, each end of the high tension sheet material 40 or high tension wire is supported by the fitting plate 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. 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]

2. Description of the Related Art As an expansion joint for a bridge, for example, FIG.
The joint body J has an upper surface-side groove 10, 10 and a lower surface-side groove 11 extending in a direction perpendicular to the bridge axis direction of the bridge H, as shown in FIG. A thick elastic band 1, a reinforcing steel plate 2 a buried in an upper region between the grooves 10 in the elastic band 1, and the elastic band 1
And reinforcing steel plates 2b buried respectively in lower regions on both left and right sides of the groove 11 of the first embodiment, and the elastic band-shaped portion between the adjacent grooves 10 and 11 serves as a shear deformation portion 12.

In this expansion joint, as shown in FIG. 9, the joint 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 the joint H of the bridge H due to a change in environmental temperature or the like. The expansion and contraction is absorbed by the deformation of the shear deformation portion 12.

[0004] However, this expansion joint cannot absorb the separation between the large bridges H and H when an abnormality (earthquake) occurs.

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.

In this expansion joint for bridges, as shown in FIG. 10, one end of the receiving plate 3 is embedded in the end face of each bridge H, and when a tensile force acts on the other end of the receiving plate 3, the receiving plate 3 is closed. Is pulled out from the bridge H only to a certain extent, and the joint body J is bolted or the like in such a manner as to be placed 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, so that it is impossible to safely support the vehicle. Are connected by a chain or the like in which the ends are loosened.

However, in this expansion joint for bridges,
There are the following problems. The attachment of heavy chains to the receiving plates 3 and 3 is performed locally, which is troublesome. A heavy chain or the like is in a suspended state, which may cause a fall accident. The presence of chains and the like can cause noise due to vibration and wind force.

Accordingly, 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 components that may cause a fall accident or noise.

[0009]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a bridge which can sufficiently absorb a large separation between bridges, is easy to construct, and does not require components which may cause a fall accident or noise. Another object of the present invention is to provide an expansion joint which is easy to construct and hardly causes a fall accident or noise.

[0010]

SUMMARY OF THE INVENTION 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 receiving projecting from each bridge. An expansion joint for a bridge formed by spanning a joint main body between plate portions and bolting and extending and limiting or bolting an expansion limiting device, wherein the expansion limiting device is a high-tensile sheet material or a high-strength sheet material. Each end of the tension line is supported by a mounting plate, and the mounting plate is fixed or bolted to a receiving plate. At a normal distance between bridges, a high-tensile sheet material or a high The tension line is loose. (Invention according to claim 2) The expansion joint for a bridge of the present invention is:
According to the first aspect of the present invention, 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. (Explanation of Claim 3) The expansion joint for bridges of the present invention is
According to the first or second aspect of the present invention, the mounting plate is composed of a high-tensile sheet material or two plate materials sandwiching each end of the high-tensile wire, and the plate materials are mutually connected, and the plate material and the high-tensile sheet are interposed. The materials or the high tension wires are in a fixed state. (Explanation of claim 4) The expansion joint for bridges of the present invention is:
According to the first or second aspect of the present invention, the expansion restricting device flattens the high-tensile sheet material or the high-tensile line formed in a loop shape, and forms the flat sheet of the high-tensile sheet material or the high-tensile line. A mounting plate is inserted through one end and the other end of the loop, and the mounting plate and a high-tensile sheet material or a high-tensile wire are fixed to each other. (Invention according to claim 5) The expansion joint for a bridge of the present invention is:
According to the first or second aspect of the present invention, the expansion restricting device is configured such that each end of the high-tensile sheet material or the high-tensile wire is fixed to one surface of the mounting plate. The surface to which the high tension wire is fixed is the surface to be fixed 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 pulled out by a fixed amount, and a joint body is suspended between receiving plate portions protruding from each bridge. An expansion restricting device used for a bridge type expansion joint for a hand-over type, wherein each end of a high-tensile sheet material or a high-tensile line is supported by a mounting plate. Is that one mounting plate is fixed or bolted to the other mounting plate, respectively. (The invention according to claim 7) In the expansion restricting device according to the present invention, in the invention according to claim 6, the mounting plate is constituted by a high-tensile sheet material or two plate materials sandwiching each end of the high-tensile wire. The plate material and the plate material and the high-tensile sheet material or the high-tensile wire are in a fixed state. (The invention according to claim 8) The expansion restricting device according to claim 6, wherein the high tension sheet material or the high tension wire formed in a loop shape is flattened and the high tension sheet is formed. Attachment plates are respectively inserted into one end and the other end of the flat loop of the material or the high tension wire, and the attachment plate and the high tension sheet material or the high tension wire are fixed. (The invention described in claim 8) According to the invention described in claim 6, the expansion restricting device according to the present invention is configured such that each end of a high-tensile sheet material or a high-tensile wire is fixed to one surface of a mounting plate. .

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] The expansion joint for a bridge of this embodiment is shown in FIG.
As shown in FIG. 3 and FIG. 3, a horizontal receiving plate 3 is buried in each end face of the bridges H and H facing each other so as to be able to be drawn out by a fixed amount, and the receiving plates 3 projecting from each bridge H are interposed between the receiving plates 3. A joint main body J is mounted on the base plate, and the extension limiting device 4 is jointly fastened with bolts B at a portion where the receiving plate 3 and the joint main body J overlap. (Regarding attachment of the receiving plate 3 to the end face of the bridge H) The receiving plate 3 is made of a steel plate having a plurality of long holes 30 on the side embedded in the bridge H, as shown in FIGS. The mounting of the receiving plate 3 to the end face of the bridge H is performed by inserting a bolt AB embedded in the bridge H into the elongated hole 30. (Joint Body J) As shown in FIG. 1, the joint body J has grooves 10 and 10 on the upper surface side and a groove 11 on the lower surface side extending in a direction perpendicular to the bridge axis direction of the bridge H and having a substantially constant thickness. The elastic strip 1, a reinforcing steel plate 2 a buried in the upper region between the grooves 10, 10 in the elastic band 1, and the reinforcing steel plates buried in lower regions on both left and right sides of the groove 11 in the elastic band 1. 2b, and the elastic band-shaped portion between the adjacent grooves 10 and 11 serves 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.

The elastic strip 1 has a thick wall which 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 abrasion resistance. (Regarding the expansion restricting device 4) As shown in FIG. 4, the expansion restricting device 4 includes a high-tensile sheet material 40 and the high-tensile sheet material.
The mounting plate 41 is fixed to each end of the high-strength sheet material 40. More specifically, each end of the high-strength sheet material 40 is formed by two plate members 41a, 41a constituting the mounting plate 41. While holding, the plate members 41a, 41a mutually, and the plate member 41a
And the high-tensile sheet material 40 are fixed to each other with an adhesive or the like. The mounting plate 41 has a through hole h2 through which the holt B is inserted.

Here, the high-tensile sheet material 40 is formed by weaving a high-tensile wire made of any one of polymer fibers such as glass fiber, carbon fiber, aramid fiber and nylon fiber, iron-based wire, stainless steel-based wire and the like. As a woven fabric. (About the aspect in which the joint body J and the expansion limiting 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
The bolt B inserted from the bolt insertion hole 13 of the joint body J is fixed so as to be inserted into the through holes h1 and h2 and screwed into the receiving plate 3. (Regarding the function of the expansion joint for bridges with respect to the change in environmental temperature) The bridges H and H will approach and separate from each other with the change in environmental temperature. Is absorbed by the shear deformation of the groove and the expansion and contraction of the grooves 10, 10. (About the function of the expansion joint 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 extension of the joint body J is in a tensioned state as shown in FIG. , And further elongation of the joint body J is prevented. Then, when the separation between the bridges H and H is further larger than this, the receiving plate 3 is pulled out from the bridge H as shown in FIG. Therefore, in this bridge expansion joint, as is clear from FIG. 6, even when the distance between the bridges H, H is greatly increased, the vehicle can pass safely.

Further, since the expansion limiting device 4 having the same function as the chain described in the section of the prior art is structured so as to be fastened together with the receiving plate 3 and the joint body J via the bolt B, the structure of the chain or the like is used. The members need not be welded on site.

Further, the high-tensile sheet material 40 is 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, stainless steel-based wire and the like. Since the fabric is formed, the danger of falling accidents and noise is extremely low.

When the bridges H and H approach each other, the joint main body J contracts and deforms in substantially the same manner as when the bridges H and H are directly erected directly between the bridges H and H. [Embodiment 2] In the expansion joint for bridges of this embodiment, as shown in FIG. 7, the end of the receiving plate 3 is projected to the region of the groove 11 of the joint body J, and the region of the groove 11 of the receiving plate is formed. The mounting plate 41 is fixed (or bolted or both) to the upper surface of the portion protruding from.

That is, a horizontal receiving plate 3 is buried in each end face of the bridges H and H facing each other so as to be able to be pulled out by a fixed amount, and the joint body J is inserted between the receiving plates 3 protruding from each bridge H. The same operation and effects as those of the first embodiment can be obtained as long as the expansion restricting device 4 is fixedly fixed or bolted while being extended and bolted. [Another Embodiment of Expansion Limiting Device 4 ] The expansion limiting device 4 is not limited to the one described in the first embodiment, and the expansion limiting device 4 is formed into a flat loop as shown in FIG. A high-strength sheet material 40 and mounting plates 41 respectively inserted at one end and the other end of the flat loop of the high-tensile sheet material 40. May be fixedly formed. When the expansion restricting device 4 is used, the tensile strength is almost double that of the first embodiment.

The expansion restricting device 4 is not limited to the above-described first embodiment. The expansion restricting device 4 is formed by fixing the end of the high-tensile sheet material 40 to one surface of the mounting plate 41. It is also possible to make it. In this case, the mounting plate
It is preferable that the surface of the side 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.

Further, the extension restricting device 4 is used in the first embodiment.
However, the present invention is not limited to this, and a mode in which a plurality of high tension wires are fixed to the mounting plate 41 in parallel can be adopted. As the high tension wire, glass fiber, carbon fiber, polymer fiber such as aramid fiber and nylon fiber, iron-based wire,
Stainless steel wire or the like can be used. [Other Embodiments of Joint Body J ] The joint body J of Embodiment 1 is 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 is used. Can be adopted.

[0021]

As is clear from the description of the embodiment of the present invention, the components that can sufficiently absorb the large separation between the bridges, are easy to construct, and may cause a fall accident or noise. It is possible to provide an expansion joint for bridges that is not required, and to provide an expansion restricting device that is easy to perform and hardly causes a fall accident or noise.

[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 a bridge when the bridges further facing each other 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 bridges.

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 limiter 40 High tension sheet material 41 Mounting plate

Claims (9)

[Claims] 1. 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 predetermined amount, and a joint body is hung and bolted between receiving plate portions projecting from each bridge. An expansion joint for a bridge, which is fixed or bolted over an expansion limiting device, wherein the expansion limiting device is configured such that each end of a high-tensile sheet material or a high-tensile line is supported by a mounting plate. A bridge, wherein 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. Expansion joints. 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 so as to be sandwiched between the receiving plate and the joint body. . 3. The mounting plate is composed of a high-tensile sheet material or two plates that sandwich each end of the high-tensile wire.
The plate material and the plate material and the high-tensile sheet material or the high-tensile wire are fixed to each other.
Or the expansion joint for bridges according to 2. 4. An expansion restricting device for flattening a high-tensile sheet material or a high-tensile line formed in a loop shape, and an end of the high-tensile sheet material or a high-tensile line in a flat loop. The expansion joint for a bridge according to claim 1 or 2, wherein a mounting plate is inserted into each of the other end sides, and the mounting plate and a high-tensile sheet material or a high-tensile wire are fixed. 5. The expansion restricting device according to claim 1, wherein each end of the high-tensile sheet material or the high-tensile line is fixed to one surface of the mounting plate, and the high-tensile sheet material or the high-tensile line on the mounting plate is fixed. The expansion joint for a bridge according to claim 1 or 2, wherein the surface side is a surface fixed to the receiving plate. 6. An expansion joint for bridges in which 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 predetermined amount, and a joint body is suspended between receiving plate portions protruding from each bridge. An expansion limiting device used for the high tension sheet material or the high tension wire is configured such that each end of the high tension wire is supported by a mounting plate, and one mounting plate is attached to one receiving plate and the other Wherein the mounting plate is fixed or bolted to the other receiving plate. 7. The mounting plate is composed of a high-tensile sheet material or two plates that sandwich each end of the high-tensile wire.
7. The sheet material, and the sheet material and the high-tensile sheet material or the high-tensile wire are in a fixed state.
The expansion limiting device as described. 8. A high-tensile sheet material or a high-tensile line formed in a loop shape is flattened, and one end and the other end of the flat loop of the high-tensile sheet material or the high-tensile line are respectively provided. The expansion restricting device according to claim 6, wherein the mounting plate is inserted, and the mounting plate and the high-tensile sheet material or the high-tensile wire are fixed. 9. 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.