JP6191369B2 - Telescopic device for road bridge - Google Patents

Description

  The present invention relates to a telescopic device for a road bridge.

A road bridge includes, for example, an abutment disposed at both ends in the bridge axis direction and one or more floor slabs arranged in the bridge axis direction between the abutments as elements constituting the road bridge. Yes.
The joint between the abutment and the floor slab and the joint between the floor slabs are configured to include a road bridge expansion and contraction device.
In general, the expansion device for a road bridge is provided at each end of the elements constituting the road bridge, that is, at the end of the abutment and the end of the floor slab facing each other, or at the end of the floor slab facing each other. An attached joint member, and a water stop member that is disposed below the joint member between the joint members and can expand and contract in the bridge axis direction are provided.
Many of the joint members have a surface plate that is flush with the upper surface of the road bridge. An uneven gap is formed extending in the direction orthogonal to the bridge axis direction between the ends of the surface plates facing each other. This uneven gap increases or decreases according to the expansion and contraction of the floor slab in the direction of the bridge axis, and absorbs the expansion and contraction of the floor slab.
In such a road bridge telescopic device, an uneven gap is formed, and depending on the size of the gap, the wheels of the two-wheeled vehicle may get stuck in the gap, which may hinder travel.
In view of this, a road bridge expansion and contraction device in which a part of the gap is compensated by a filling member has been proposed (see Patent Document 1).

JP 2000-96503 A

However, in the above prior art, the interlining member has an elongated rectangular plate shape, and the linear portion is connected via the bent portion according to the unevenness of the gap. There is a concern that the gap between them may become large, and the wheels of a two-wheeled vehicle passing through the road bridge may get stuck in this gap and cause wheel removal.
This invention is made | formed in view of such a situation, and it aims at providing the expansion-contraction apparatus for road bridges advantageous when filling the clearance gap formed between joint members reliably.

  In order to achieve the above object, a road bridge telescopic device according to the present invention includes a pair of joint members, a water stop member, and a padding member, together with opposite ends of elements constituting the road bridge. A joint portion of a road bridge is configured, and the pair of joint members have surface plates that are respectively attached to the opposite end portions and are flush with the upper surface of the road bridge, and end surfaces of the surface plates facing each other An uneven gap extending in a direction intersecting with the direction in which the road bridge extends is formed, and the water stop member is extendable in the direction of the bridge axis, and between the opposite ends below the surface plate The interlining member is a road bridge expansion and contraction device disposed in the uneven gap so as to make up a part of the interspace, and the interlining member has an axial direction in the vertical direction. The entire length of the concavo-convex gap inserted into the concavo-convex gap A plurality of elastically deformable cylindrical members disposed across, a connecting portion connecting the plurality of cylindrical members, and provided on the cylindrical member or the connecting portion and engageable with the lower surface of the surface plate. The cylindrical member is configured with a locking portion that prevents the cylindrical member from being pulled upward from the upper surface of the surface plate, and the plurality of cylindrical members are mounted on the water stop member at their lower end surfaces, Their upper end surfaces are exposed from the gap to the upper surface side of the surface plate.

  According to the present invention, since the interposing member is disposed in the gap, a part of the gap is compensated for, so that the wheels of a two-wheeled vehicle such as a bicycle or a motorcycle are prevented from entering the gap. In addition, since the tubular member of the padding member has a tubular cross section, the cross-sectional area of the portion exposed on the road bridge is larger than that of a conventional elongated rectangular plate member. Therefore, the gap filling area is increased as compared with the conventional case, and it is possible to more reliably prevent the wheel from being removed into the gap. In addition, since the cylindrical member is made of an elastic material, the expansion and contraction of the facing road bridge causes damage to the cylindrical member even if the cylindrical member is pinched between the two ends. Since it can suppress, it becomes advantageous when maintaining the function of the expansion device for road bridges over a long period.

It is a perspective view which shows the structure of the expansion device 10 for road bridges in 1st Embodiment. It is sectional drawing which shows the structure of the expansion-contraction apparatus 10 for road bridges in 1st Embodiment. It is explanatory drawing which shows the structure of the padding member 16 in 1st Embodiment, (A) is a top view, (B) is a perspective view. It is explanatory drawing which shows the behavior of the filling member 16 at the time of expansion and contraction of the road bridge in the bridge axis direction, (A) shows the time when the road bridge is extended, and (B) shows the time when the road bridge is reduced. It is explanatory drawing which shows the structure of the filling member 16 at the time of providing a reinforcement layer. It is explanatory drawing which shows the structure of the padding member 16 in 2nd Embodiment, (A) is a top view, (B) is a perspective view.

(First embodiment)
Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 2, the road bridge is configured by arranging a large number of floor slabs 2 supported by piers in the direction of the bridge axis, and the joint portions 4 of the floor slabs 2 are the ends of the floor slabs 2 facing each other. Part (equivalent to the mutually opposing end part of the elements constituting the road bridge) and the road bridge telescopic device 10.
As shown in FIGS. 1 and 2, the road bridge telescopic device 10 includes a pair of joint members 12, a water stop member 14, and a padding member 16.

The pair of joint members 12 are respectively attached to the opposite ends of the floor slab 2 and move in the bridge axis direction integrally with the floor slab 2 according to the expansion and contraction of the floor slab 2 in the bridge axis direction.
The joint member 12 includes a surface plate 18, a side plate 20, and an anchor member 22, and the surface plate 18 and the side plate 20 are integrally formed of a steel material.
The surface plate 18 extends over the entire length in the direction orthogonal to the bridge axis direction at the end of the floor slab 2 and is flush with the upper surface of the bridge pavement 3 (the upper surface of the road bridge) formed on the upper surface of the floor slab 2. An upper surface 1802, a lower surface 1806 positioned opposite to the upper surface 1802, and an uneven end surface 1804.
The pair of joint members 12 are arranged so that the uneven end surfaces 1804 are engaged with each other with the gap S between the ends of the floor slabs 2 facing each other. Therefore, when viewed in plan by the concave and convex end surfaces 1804 of the pair of joint members 12 attached to the ends of the floor slabs 2 facing each other, the projections in the direction orthogonal to the bridge axis direction are repeated in the bridge axis direction. An uneven gap S extending over the entire length is formed, and the dimension of the gap S in the bridge axis direction increases or decreases according to the expansion and contraction of the floor slab 2 in the bridge axis direction.

The side plate 20 extends over the entire length of the front plate 18 in the longitudinal direction, is suspended from the end opposite to the uneven end surface 1804 of the front plate 18, and the lower end of the side plate 20 is placed on the bottom surface of the recess 2A. ing.
The side plate 20 has an inner side surface 2002 positioned on the gap S side and an outer side surface 2004 positioned on the opposite side, and an anchor member 22 projects from the outer side surface 2004.
Post-cast concrete 13 is placed between the outer side surface 2004 and the recess 2 </ b> A, and the joint member 12 is fixed to the end portion of the floor slab 2 via the anchor member 22 and the post-cast concrete 13.

The water stop member 14 prevents the rainwater that enters from the gap S from flowing down during the rain or the like.
The water stop member 14 is made of a conventionally known elastic material such as rubber.
The water stop member 14 extends over the entire length in a direction orthogonal to the bridge axis direction of the joint member 12, and the water stop members 14 are respectively attached to the inner side surfaces 2002 facing each other. That is, the water stop member 14 connects between the end portions of the floor slab 2 facing each other below the surface plate 18.
A plurality of recesses extending in a direction orthogonal to the bridge axis direction are provided on the upper surface 1410 and the lower surface 1412 of the water stop member 14 at intervals in the bridge axis direction. The water stop member 14 has a bellows shape, and the joint member 12. It expands and contracts in the direction of the bridge axis following the movement.

The filling member 16 is for filling a part of the gap S formed between the end faces 1804 of the surface plate 18.
As shown in FIGS. 3A and 3B, the padding member 16 includes a plurality of cylindrical members 24 that can be elastically deformed, a connecting portion 25 that connects the plurality of cylindrical members 24, and the cylindrical member 24. Is provided with a locking portion 26 that prevents the upper portion from being extracted upward from the gap S.
As shown in FIGS. 1 and 2, the plurality of cylindrical members 24 are inserted into the concavo-convex gap S with their axial directions directed in the vertical direction, and are positioned over the entire length of the concavo-convex gap S. Has been placed.
In the present embodiment, the cylindrical member 24 has a cylindrical shape, but the shape of the cylindrical member 24 is not limited to a cylindrical shape, and may be a rectangular cylindrical shape, a polygonal cylindrical shape, or the like.
The filling member 16 is made of an elastic material, and various conventionally known elastic materials such as rubber can be used as the elastic material.

As shown in FIGS. 3A and 3B, four types of cylindrical members 24 </ b> A to 24 </ b> D having the same height and different diameters are used as the cylindrical member 24, and the cylindrical members 24 </ b> A and 24 </ b> C having large diameters are used. The cylindrical members 24B and 24D having small diameters are alternately arranged.
The diameter of the cylindrical member 24 is determined according to the maximum width of the gap S. That is, the diameter of the cylindrical member 24 is set to a value within a range in which the wheels of the two-wheeled vehicle do not fit into the gap between the side surface 2406 of the cylindrical member 24 and the end surface 1804 of the joint member 12 below the maximum width of the gap S. .
In addition, although the diameter of all the cylindrical members 24 may be made the same, when the cylindrical members 24 having different diameters are used as in the present embodiment, the diameter increases when the gap S reaches the maximum width. It is advantageous in that the gap S can be largely compensated at the location where the cylindrical members 24A and 24C are located, and when the gap S becomes the minimum width, the cylindrical members 24B and 24D having a small diameter can provide a large diameter cylinder. It is advantageous in that a space for compressive deformation of the shaped members 24A and 24C can be secured.

  As shown in FIG. 2, the height of the tubular member 24 is determined in accordance with the upper surface 1410 of the water stop member 14 and the upper surface of the bridge pavement 3 (the upper surface 1802 of the surface plate 18). That is, the height of the cylindrical member 24 is formed such that the upper end surface 2402 is exposed from the gap S to the upper surface 1802 of the surface plate 18 when the cylindrical member 24 is placed on the upper surface 1410 of the water blocking member 14. (See FIG. 1). More specifically, the height of the cylindrical member 24 is set so that the upper end surface 2402 of the cylindrical member 24 does not exceed the upper surface 1802 of the surface plate 18, and in FIG. It is located slightly below the upper surface 1802 of the surface plate 18.

The connecting portion 25 connects the plurality of cylindrical members 24 in a state in which the axial direction of the cylindrical member 24 is arranged in the direction perpendicular to the axial direction of the cylindrical member 24 with the axial direction of the cylindrical member 24 in the vertical direction.
In a state where the plurality of cylindrical members 24 are connected by the connecting portion 25, the upper end surface 2402 and the lower end surface 2404 of the plurality of cylindrical members 24 are respectively located on the same plane.
In the present embodiment, the side surfaces 2406 of the plurality of cylindrical members 24 are attached to each other, and the connecting portion 25 is formed at a location where the side surfaces 2406 of the plurality of cylindrical members 24 are attached. ing.
Moreover, in this Embodiment, the some cylindrical member 24 is bent and connected by the connection part 25 so that it may become the shape along the uneven | corrugated clearance S. As shown in FIG. Since the cylindrical member 24 is elastically deformable, the plurality of cylindrical members 24 may be connected in a straight line, but the plurality of cylindrical members 24 are bent into a shape along the uneven gap S. When connected, it is possible to more easily perform the work of arranging the interspace member 16 in the gap S, and it is advantageous in increasing the assembly work efficiency of the road bridge telescopic device 10.

The locking portion 26 can be locked to the lower surface 1806 of the surface plate 18, and the tubular member 24 is pulled upward from the upper surface 1802 of the surface plate 18 when the floor slab 2 (road bridge) expands and contracts in the bridge axis direction. It will be prevented from being released.
The locking part 26 has a dimension larger than the maximum width of the gap S in the bridge axis direction of the road bridge.
The locking part 26 is provided at the lower end of the cylindrical member 24. More specifically, the locking part 26 protrudes radially outward of the cylindrical member 24 from two places on the side surface of the lower end passing through the diameter of the cylindrical member 24. The lower surface of 26 is located on the same plane as the lower end surface 2404 of the cylindrical member 24. Therefore, in the present embodiment, the locking portion 26 prevents the interlining member 16 from being pulled upward from the upper surface of the surface plate 18 when the floor slab 2 (road bridge) expands and contracts in the bridge axis direction. And functions as a mounting surface for placing the tubular member 24 on the water-stopping member 14 in a stable manner.
Although the locking portion 26 may be provided on all the cylindrical members 24, one locking portion 26 is provided for each of the plurality of cylindrical members 24 in the present embodiment.
In addition, although the latching | locking part 26 may be provided in the connection part 25 or may be provided in the upper part of the cylindrical member 24, if it provides in the lower end of the cylindrical member 24 like embodiment, a cylindrical member will be provided. In order to increase the stability of the standing state of the cylindrical member 24 by lowering the center of gravity of the cylindrical member 24, and to further improve the stability of the standing state of the cylindrical member 24 by functioning as a mounting surface of the cylindrical member 24. It will be advantageous.

Furthermore, in the present embodiment, the plurality of tubular members 24 are connected by the connecting portions 25 with a length shorter than the length of the uneven gap S in the direction intersecting with the extending direction of the road bridge, and the locking portions 26. A plurality of cylindrical member units 28 are provided.
Therefore, the padding member 16 includes a plurality of cylindrical member units 28.
For example, as shown in FIGS. 3A and 3B, the cylindrical member unit 28 includes four types of cylindrical members 24 </ b> A to 24 </ b> D having different diameters, and a total of eight cylindrical members 24 are connected to the connecting portion 25. Are connected to each other, and two cylindrical members 24 are provided with locking portions 26.
In the cylindrical member unit 28, eight cylindrical members 24 may be linearly connected, or may be connected by being bent in accordance with the gap S.
Providing such a cylindrical member unit 28 is advantageous in enhancing the versatility of the interposing member 16 for road bridges having different widths.
When the width of the road bridge on which the road bridge telescopic device 10 is installed is determined, a plurality of cylinders are arranged so that the cylindrical member 24 is positioned over the entire length of the gap S instead of using the cylindrical member unit 28. A single filling member 16 in which the shaped member 24 is bent and connected at the connecting portion 25 or connected linearly may be used.

In addition, you may make it attach the side surface 2406 of the one part cylindrical member 24 of the some cylindrical member 24, and the side plate 20 of the coupling member 12. FIG. For example, the side surface 2406 of the cylindrical member 24 that is in contact with the end surface 1804 of the joint member 12 at the maximum width of the gap S (see FIG. 4A) is joined to the side plate 20 of the joint member 12 by bonding or screws.
Thus, fixing a part of the filling member 16 to the joint member 12 is advantageous in preventing creep of the filling member 16 due to long-term deformation.
That is, it is assumed that the space member 2 is compressed and deformed for a long period of time between the two end faces 1804 facing each other because the floor temperature 2 is extended in the direction of the bridge axis and the gap S is shortened because the environmental temperature becomes high. . Eventually, when the floor slab 2 shrinks in the direction of the bridge axis and the gap S widens with a decrease in the environmental temperature, the filling member 16 is forcibly extended following the side plate 20 to cause the filling member due to long-term deformation. 16 creep is prevented.

Next, the effect of the road bridge telescopic device 10 will be described.
As shown in FIG. 2, since the cylindrical member 24 is disposed in the gap S, the gap S is compensated, so that a wheel of a motorcycle such as a bicycle or a motorcycle is prevented from getting stuck in the gap S.
At this time, since the cylindrical member 24 has a cylindrical cross section, the cross-sectional area of the portion exposed on the road bridge is larger than that of a conventional elongated rectangular plate member. Therefore, the filling area of the gap S is larger than that in the conventional case, which is advantageous in preventing the wheel S from being removed from the gap S more reliably.
Further, since the interposing member 16 includes the locking portion 26, there is no problem that the tubular member 24 is dropped from the gap S, and the tubular member 24 is always disposed in the gap S. Therefore, it is advantageous in maintaining the function of filling a part of the gap S formed between the end faces 1804 of the surface plate 18 (between the joint members 12) for a long period of time.

In the present embodiment, since the cylindrical member 24 has elasticity, the expansion and contraction of the road bridge causes the cylindrical member 24 to be elastically deformed even if the cylindrical member 24 is sandwiched between the two end surfaces 1804. Since it can respond by doing and can suppress the damage of the cylindrical member 24, it will become advantageous when maintaining the function of the expansion device 10 for road bridges over a long period of time.
FIGS. 4A and 4B are explanatory views showing the behavior of the padding member 16 when the road bridge extends and contracts in the bridge axis direction. FIG. 4A shows when the road bridge is extended, and the maximum width of the gap S is S1. FIG. 4B shows the time when the road bridge is reduced in the bridge axis direction, and the minimum width of the gap S is S2.
As described above, the diameter of the cylindrical member 24 is not more than the maximum width S1 of the gap S, and the range in which the wheels of the two-wheeled vehicle do not fit in the gap S between the side surface 2406 of the cylindrical member 24 and the end surface 1804 of the joint member 12. Even when the road bridge extends and the gap S increases as shown in FIG. 4A, the wheels of the motorcycle do not get stuck in the gap S.
As shown in FIG. 4B, when the road bridge is reduced and the gap S is reduced, the tubular member 24 is elastically deformed so that the volume of the tubular member 24 is accommodated in the gap S, and the gap member The function as 16 can be maintained.

In the present embodiment, since the cylindrical member 24 is made of an elastic material, for example, a two-wheeled vehicle that has higher rigidity in the vertical direction (gravity direction) than a foamed material such as a sponge and passes through a road bridge. It is possible to more reliably support the wheels and the like.
Further, since the elastic material has a higher restoring force with respect to the long-term compression than the foam, it is possible to reduce the possibility that the padding member 16 that can be in a compressed state for a long time is plastically deformed.
Further, a reinforcing layer such as a metal such as steel or cloth may be provided inside the cylindrical member 24. More specifically, for example, as shown in FIG. 5, a reinforcing layer 32 is provided along the circumferential direction inside the cylindrical member 24. Thereby, the support force of the vertical direction of the padding member 16 can be raised more, maintaining the rigidity which can follow the deformation | transformation to the expansion-contraction direction (horizontal direction) of a road bridge.

  Further, in the present embodiment, the interstitial member 16 is constituted by a plurality of cylindrical member units 28, whereby replacement work due to wear due to long-term use or the like can be easily performed. That is, when the tubular member 24 that fills the gap S is deteriorated or damaged, only the tubular member unit 28 including the tubular member 24 that needs to be replaced is easily replaced without performing a large-scale operation. can do. Therefore, it is advantageous in maintaining the function of the road bridge telescopic device 10 while reducing the maintenance cost.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.
The second embodiment is different from the first embodiment in the configuration of the connecting portion 25. In addition, the same code | symbol is attached | subjected to the part or member which is the same as that of 1st Embodiment, or a member, description is abbreviate | omitted, and a different part is demonstrated intensively.
In the second embodiment, a connecting portion 25 that connects a plurality of cylindrical members 24 is constituted by a connecting member 30.
The connecting member 30 extends in a direction intersecting with the axial direction of the cylindrical member 24 and connects adjacent cylindrical members 24 to each other.
The connecting member 30 has a rectangular plate shape, and a pair of long side portions are joined to the side surface 2406 of the adjacent cylindrical member 24.
The length of the long side portion is the same as the length of the cylindrical member 24, and therefore, the short side portion on the upper side of the connecting member 30 having a rectangular shape is located on the same plane as the upper end surface 2402 of the cylindrical member 24, The lower short side portion is located on the same plane as the lower end surface 2404 of the cylindrical member, and the lower short side portion of the connecting member 30 also functions as a mounting surface for holding the cylindrical member 24 upright.

The cylindrical member 24 and the connecting member 30 may be formed separately, and the side surface 2406 of the cylindrical member 24 and the long side portion of the connecting member 30 may be bonded, or the cylindrical member 24 and the connecting member 30 may be bonded together. May be integrally formed.
Since the connecting member 30 has a smaller volume and lower rigidity than the cylindrical member 24, the connecting member 30 is easily deformed. For this reason, it becomes advantageous when installing the interposing member 16 simply by deform | transforming the connection member 30 according to the uneven | corrugated shape of the clearance gap S. FIG.
That is, according to the second embodiment, it is a matter of course that the interposing member 16 can be easily installed even if the shape of the interposing member 16 and the uneven shape of the gap S do not exactly match. Even if it is the filling member 16 which arranged the linear member 24 in linear form, installation of the filling member 16 becomes easy by deform | transforming the connection member 30. FIG.
In the second embodiment, the connecting member 30 has a rectangular plate shape. However, the present invention is not limited to this. For example, the connecting member 30 protrudes in a rod shape from the side surface 2406 of the cylindrical member 24 outward in the radial direction of the cylindrical member 24. It is good.

  In addition, although embodiment demonstrated the case where the joint member 12 was attached to the edge part of the floor slab 2 which mutually opposes, the joint member 12 is with the edge part which mutually opposes the element which comprises a road bridge. The joint member 12 may be attached to the end portion of the abutment and the end portion of the floor slab 2 that constitute a joint portion of the road bridge.

S Gap 4 Seam 10 Road bridge expansion and contraction device 12 Joint member 14 Water stop member 16 Filling member 18 Surface plate 1802 Upper surface 1804 End surface 1806 Lower surface 20 Side plate 24 Cylindrical member 2402 Upper surface 2404 Lower surface 2406 Side surface 25 Connecting portion 26 Stop part 28 Cylindrical member unit 30 Connecting member 32 Reinforcing layer

Claims (8)

A seam portion of the road bridge is configured with a pair of joint members, a water stop member, and a padding member, together with opposite ends of elements constituting the road bridge,
The pair of joint members have surface plates that are respectively attached to the end portions facing each other and are flush with the upper surface of the road bridge;
An uneven gap extending in the direction intersecting with the extending direction of the road bridge is formed between the end faces of the face plates facing each other,
The water stop member is extendable in the direction of the bridge axis and connects between the opposite ends under the surface plate,
The interstitial member is a road bridge expansion and contraction device arranged in the uneven gap so as to compensate a part of the gap,
The interstitial members are inserted into the concavo-convex gap with the axial direction directed in the up-down direction, and are arranged over the entire length of the concavo-convex gap. A connecting portion that connects members, and a member that is provided on the cylindrical member or the connecting portion and that can be locked to the lower surface of the surface plate and prevents the cylindrical member from being pulled upward from the upper surface of the surface plate. It consists of a stop and
The plurality of cylindrical members have their lower end surfaces placed on the water stop member, and their upper end surfaces are exposed from the gap to the upper surface side of the surface plate,
A telescopic device for road bridges. A plurality of cylindrical member units that are connected by the connecting portion with a length shorter than the length of the uneven gap in the direction in which the plurality of cylindrical members intersect the extending direction of the road bridge are provided. And
The padding member is composed of the plurality of tubular member units.
The road bridge telescopic device according to claim 1. The side surfaces of the plurality of cylindrical members are attached,
The connecting portion is formed at a location where the side surfaces of the plurality of tubular members are attached.
A telescopic device for a road bridge according to claim 1 or 2. An elastically deformable connecting member that extends in a direction intersecting the axial direction of the cylindrical member and connects the adjacent cylindrical members is provided,
The connecting portion is formed of the connecting member.
A telescopic device for a road bridge according to claim 1 or 2. The plurality of cylindrical members are bent and connected by the connecting portion in a shape along the uneven gap,
The expansion / contraction apparatus for road bridges as described in any one of Claim 1 to 4 characterized by the above-mentioned. For the cylindrical member, at least two types of cylindrical members having different diameters are used,
The cylindrical member having a large diameter and the cylindrical member having a small diameter are connected by the connecting portion so as to be alternately positioned.
The road bridge telescopic device according to any one of claims 1 to 5. Inside the cylindrical member, a cloth or metal reinforcement layer along the circumferential direction is provided,
The expansion / contraction device for a road bridge according to any one of claims 1 to 6. The pair of joint members have side plates attached to the end portions,
The surface plate protrudes from the top of the side plate,
Side surfaces of some of the cylindrical members and the side plates are attached,
The road bridge telescopic device according to any one of claims 1 to 7.

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