JP2016023408A - Expansion joint for road bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress breaking of a seal member due to a torsional load applied.SOLUTION: An expansion joint for a road bridge includes: a corrugated plate 1 bent in a zigzag shape and extending in a longer-side direction of a joint of a road bridge; a horizontal plate 2 having a concave-convex part at an edge corresponding to a concave part and a convex part of the corrugated plate 1 and forming a joint gap 3 between the corrugated plate 1 and the horizontal plate; a first support member 7 installed on the corrugated plate 1 and having a first vertical plate 7a that extends linearly connecting adjacent convex parts of the corrugated plate 1 over the concave part of the corrugated plate 1, on a side below the horizontal plate 2; a second support member 19 installed below the horizontal plate 2 and having a second vertical plate 19a that linearly extends opposite the first vertical plate 7a; and a groove-form seal member 4 having an end 4a fixed on the first vertical plate 7a and the other end 4b fixed on the second vertical plate 19a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an expansion joint for a road bridge, and particularly relates to measures against damage to a seal member.

  Conventionally, as an expansion joint for a road bridge, it has a corrugated plate extending in a zigzag manner in the longitudinal direction of the seam of the road bridge, and a corrugated portion corresponding to the concave portion and convex portion of the corrugated plate at the tip, Some have a transverse plate that forms a corrugated gap in between. A groove-shaped seal member is interposed between the gaps, and rainwater falling from the gap is received by the seal member (see Non-Patent Document 1).

“Expanding Devices for Bridge Extension Standard Collection Vol. VI” Japan Road Joint Association January 2000, p. [6-10]

  However, in the expansion joint for road bridge, one end of the seal member is fixed to the concave or convex portion of the corrugated plate, and the other end is fixed to the concave and convex portion of the horizontal plate. Here, the concave portion or the convex portion of the corrugated plate or the concave and convex portion of the horizontal plate has a portion extending obliquely with respect to the longitudinal direction of the joint of the road bridge. For this reason, in the diagonally extending portion, the seal member expands and contracts obliquely and twists with respect to the reduction direction of the play. And it received the torsional load, and there existed a problem that a sealing member will be damaged in a comparatively short period.

  This invention is made | formed in view of this point, The objective is to suppress that a sealing member is damaged by receiving a torsional load.

  The invention according to claim 1 is directed to an expansion joint for a road bridge constructed so as to straddle the road bridge main body on both sides of the gap of the road bridge joint portion or to straddle the road bridge main body and the abutment on both sides of the gap. And the expansion joint for road bridge according to the present invention has a corrugated plate extending in a zigzag manner in the joint longitudinal direction of the road bridge, and an uneven portion corresponding to the concave portion and convex portion of the corrugated plate at the tip, A horizontal plate that forms a wavy gap between the corrugated plate and a corrugated plate provided on the corrugated plate, and connecting adjacent convex portions of the corrugated plate across the concave portion of the corrugated plate below the horizontal plate. A first support member having a first vertical plate extending linearly, and a second support having a second vertical plate provided below the horizontal plate and extending linearly so as to face the first vertical plate And a groove-shaped seal member having one end fixed to the first vertical plate and the other end fixed to the second vertical plate.

  In the invention according to claim 1, the seal member has one end fixed to the first vertical plate and the other end fixed to the second vertical plate. Here, both the first vertical plate and the second vertical plate extend linearly in the joint longitudinal direction of the road bridge, that is, in the direction orthogonal to the reduction direction of the play. That is, the first vertical plate and the second vertical plate do not have a portion extending obliquely with respect to the joint longitudinal direction of the road bridge. For this reason, when the clearance is reduced, the seal member does not expand and contract diagonally, and a torsional load is not applied to the seal member.

  Moreover, the 1st vertical board which a 1st supporting member has is located below the horizontal board. For this reason, it is possible to avoid interference between the first support member and the convex portion of the horizontal plate when the clearance is reduced.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the seal member is located below the convex portion of the horizontal plate and is filled with a filler.

  In the invention which concerns on Claim 2, popping out of the filler packed in the sealing member is suppressed. That is, during expansion of the play, a force for pushing the filler upward from the seal member is generated, and the convex portion of the horizontal plate exists above the seal member. For this reason, the protrusion of the filler is suppressed by the convex portion.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein one end of the seal member is detachably fixed to the first vertical plate, and the second support member is a removable filler. It is a plate.

  In the invention which concerns on Claim 3, while removing one end part of a sealing member from a 1st vertical board, only removing the filler plate to which the other end part of the sealing member was fixed, removing a sealing member from the expansion joint for road bridges Can do. For this reason, maintenance and maintenance of the seal member are facilitated.

  In the invention which concerns on Claim 4, in the invention which concerns on any one of the said Claims 1-3, the said 1st supporting member further has the obstruction | occlusion part which plugs up the recessed part of the said corrugated board by upper surface view. It is characterized by.

  In the invention which concerns on Claim 4, the recessed part of a corrugated board is block | closed by top view by the obstruction | occlusion part. For this reason, the gap in the gap becomes small as viewed from above.

  According to the first aspect of the present invention, it is possible to prevent the seal member from being damaged by preventing a torsional load from being applied to the seal member when the gap is reduced. That is, the lifetime of the seal member can be extended.

  According to the invention which concerns on Claim 2, the protrusion of a filler can be suppressed by the said convex part by providing the sealing member by which the inside was filled with the filler in the downward direction of the convex part of a horizontal plate.

  According to the invention which concerns on Claim 3, a sealing member can be easily removed from the expansion joint for road bridges. For this reason, maintenance and maintenance of the seal member can be facilitated.

  According to the invention which concerns on Claim 4, the external appearance of the expansion joint for road bridges can be improved by making the clearance gap in a play small in top view.

FIG. 1 is a perspective view showing an expansion joint according to an embodiment of the present invention. 2 is a cross-sectional view showing a II-II cross section of FIG. FIG. 3: is an exploded perspective view which shows the expansion joint which concerns on embodiment of this invention, Comprising: (A) shows the part by the side of an abutment part, (B) shows the part by the side of a steel floor slab bridge main body. Yes.

Embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.
<Embodiment 1>
1 and 2, 10A is an abutment part, 10B is a steel floor slab bridge body, 11A is a pavement forming a road surface on the side of the abutment part 10A, 11B is a pavement forming a road surface on the steel floor slab bridge body 10B side, and 12 is a free space , 13 is an expansion joint provided so as to close the gap 12, and 14 is post-cast concrete placed on the abutment part 10A side of the back of the expansion joint 13.

  The expansion joint 13 includes a corrugated plate 1, a horizontal plate 2, a plurality of anchor bolts 6 provided on the back surface of the corrugated plate 1, a support plate 7 provided on the side of the corrugated plate 1, and the horizontal plate 2. A filler plate 19 provided below and a seal member 4 provided between the support plate 7 and the filler plate 19 are provided. The support plate 7 constitutes a first support member of the present invention, and the filler plate 19 constitutes a second support member of the present invention.

  The corrugated plate 1 extends in a zigzag manner in the longitudinal direction of the seam of the road bridge, and the horizontal plate 2 has an uneven portion corresponding to the concave portion and the convex portion of the corrugated plate 1 at the tip. The corrugated plate 1 and the horizontal plate 2 are disposed so that the concave portions and the convex portions thereof are opposed to each other, whereby a corrugated gap 3 is formed between the tips.

  On the back surface of the corrugated plate 1, anchor bolts 6, which are formed in a substantially L shape by bending a plurality of straight rods and tips at the bottom, are protruded from the back of the corrugated plate 1.

  A notch step portion 15 is formed at the end of the abutment portion 10A where the corrugated plate 1 is installed. The anchor bolt 6 is disposed so as to intersect with the U-shaped line 16 and the through-line 17 that are planted in advance in the notch step part 15, and the intersecting part is welded so that the anchor bolt 6 is notched. It is fixed to. And the corrugated board 1 is installed in the abutment part 10A by placing the post-cast concrete 14 in the notch step part 15 so that it may become substantially flat with the upper surface of the corrugated board 1.

  The steel deck slab bridge main body 10 </ b> B on which the horizontal plate 2 is installed includes a deck plate 18 (steel deck), and a filler plate 19 is engaged with the upper surface of the deck plate 18. A packing rubber 21 is sandwiched between the horizontal plate 2 and the filler plate 19. Bolts are inserted through a plurality of mounting holes 20 provided in the horizontal plate 2, and the horizontal plate 2 is fixed to the deck plate 18.

  As shown in FIGS. 1, 2, and 3 (A), the support plate 7 is fixed to the side surface of the corrugated plate 1 and closes the concave portion of the corrugated plate 1. The support plate 7 includes a first vertical plate 7a that extends linearly in the joint longitudinal direction of the road bridge, and a plurality of blocking portions 7b that are continuously formed at the upper end of the first vertical plate 7a.

  The first vertical plate 7 a is a flat plate-like portion that extends linearly so as to connect adjacent convex portions of the corrugated plate 1 across the concave portion of the corrugated plate 1. The first vertical plate 7a closes the concave portion of the corrugated plate 1 in a side view below the horizontal plate 2. In other words, the upper end of the first vertical plate 7 a is located below the lower surface of the horizontal plate 2. The front surface (right side surface in FIG. 2) of the first vertical plate 7 a is along the vertical surface, and the back surface is fixed to the tip surface of the convex portion of the corrugated plate 1.

  The plurality of blocking portions 7b are plate-like portions formed along the horizontal plane at positions corresponding to the concave portions of the corrugated plate 1, respectively. The blocking portion 7b is formed in a trapezoidal plate shape that becomes narrower from the proximal end side (right side in FIG. 2) toward the distal end side. The peripheral edge portion of the blocking portion 7b is formed along the side surface of the concave portion of the corrugated plate 1, and is fixed to the side surface. Thereby, the closing part 7b has closed the recessed part of the corrugated board 1 by upper surface view.

  As shown in FIGS. 1, 2, and 3 (B), the filler plate 19 is a plate-like member having a substantially L-shaped cross section and is engaged with the upper surface of the deck plate 18 as described above. Yes. The filler plate 19 can be removed from the deck plate 18 together with the horizontal plate 2 by removing the bolts fixing the horizontal plate 2 to the deck plate 18.

  The flat plate-like portion bent downward at the tip end portion (left side portion in FIG. 2) of the filler plate 19 is a second vertical plate 19a extending linearly in the longitudinal direction of the seam of the road bridge so as to face the first vertical plate 7a. Is configured. The surface of the second vertical plate 19a (the left side surface in FIG. 2) is along the vertical plane, and faces the first vertical plate 7a in parallel.

  As shown in FIGS. 1 and 2, the seal member 4 is formed by forming a rubber plate extending in the longitudinal direction of the seam of the road bridge into a groove shape (substantially U shape), and includes a support plate 7 and a filler plate. 19 is provided. Specifically, the seal member 4 has one end portion 4a (left end portion in FIG. 2) detachably fixed to the first vertical plate 7a by, for example, screwing, and the other end portion 4b (right end portion in FIG. 2). ) Is fixed to the second vertical plate 19a. The seal member 4 is located below the convex portion 2 a of the horizontal plate 2. Inside the seal member 4, the steel floor slab bridge main body 10 </ b> B expands and contracts due to temperature changes, that is, allows the expansion and contraction of the gap 12, and in order to protect the seal member 4 from rainwater and foreign matter, sand, liquid rubber The filling material 5 is packed.

-Effect of the embodiment-
In the expansion joint 13 of the present embodiment, one end 4a of the seal member 4 is fixed to the first vertical plate 7a, and the other end 4b of the seal member 4 is fixed to the second vertical plate 19a. For this reason, it is possible to prevent the seal member 4 from being twisted when the clearance 12 is reduced, and to prevent the seal member 4 from being damaged. That is, the lifetime of the seal member 4 can be extended.

  In addition, a seal member 4 filled with a filler 5 is provided below the convex portion 2 a of the horizontal plate 2. For this reason, the protrusion of the filler 2 can be suppressed by the convex portion 2a.

  One end portion 4a of the seal member 4 is detachably fixed to the first vertical plate 7a. Further, the filler plate 19 to which the other end portion 4 b of the seal member 4 is fixed can be removed from the deck plate 18 together with the horizontal plate 2 by removing a bolt for fixing the horizontal plate 2 to the deck plate 18. For this reason, the seal member 4 can be easily removed from the expansion joint 13, and maintenance and maintenance of the seal member 4 can be facilitated.

Further, the concave portion of the corrugated plate 1 is blocked by the closed portion 7b of the support plate 7 in a top view. For this reason, the clearance gap in the gap 3 can be made small by the top view, and the external appearance of the expansion joint 13 can be improved.
<Other embodiments>
In the above-described embodiment, the support plate 7 is formed separately from the corrugated plate 1 and is fixed to the corrugated plate 1. It may be.

  Moreover, in the said embodiment, although the obstruction | occlusion part 7b is continuously formed in the upper end of the 1st vertical board 7a, it is not restricted to this, For example, the obstruction | occlusion part 7b is separated from the 1st vertical board 7a. You may make it comprise the support plate 7 by forming and fixing both.

  Moreover, in the said embodiment, although the filler plate 19 comprises the 2nd support member, it is not restricted to this, For example, the flat plate member which was separate from the filler plate 19 and was fixed to this filler plate 19 May constitute a second support member.

  Moreover, in the said embodiment, although the surface of the 1st vertical board 7a and the 2nd vertical board 19a is all along the vertical plane, it is not restricted to this, The surface is inclined to some extent with respect to the vertical plane. May be.

DESCRIPTION OF SYMBOLS 1 Corrugated plate 2 Horizontal plate 2a Convex part 3 Spacing 4 Seal member 4a One end part 4b Other end part 5 Filler 7 Support plate (1st support member)
7a First vertical plate 7b Blocking portion 13 Expansion joint 19 Filler plate (second support member)
19a Second vertical plate

Claims (4)

An expansion joint for a road bridge constructed so as to straddle the road bridge body on both sides of the gap of the road bridge joint part, or to straddle the road bridge body and abutment on both sides of the gap,
A corrugated plate extending in a zigzag manner in the longitudinal direction of the seam of the road bridge;
A lateral plate having a concave and convex portion corresponding to the concave portion and convex portion of the corrugated plate at the tip, and forming a corrugated gap with the corrugated plate;
A first support member having a first vertical plate that is provided on the corrugated plate and extends linearly so as to connect adjacent convex portions of the corrugated plate across the concave portions of the corrugated plate below the horizontal plate When,
A second support member having a second vertical plate provided below the horizontal plate and extending linearly so as to face the first vertical plate;
An expansion joint for a road bridge, comprising: a groove-shaped sealing member having one end fixed to the first vertical plate and the other end fixed to the second vertical plate. In claim 1,
The expansion joint for road bridges, wherein the seal member is located below the convex portion of the horizontal plate and is filled with a filler. In claim 1 or 2,
One end of the seal member is detachably fixed to the first vertical plate,
The expansion support for a road bridge, wherein the second support member is a removable filler plate. In any one of Claims 1-3,
The expansion support for road bridges, wherein the first support member further includes a blocking portion that closes the concave portion of the corrugated plate in a top view.

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