JP5374347B2 - Drainage structure of road bridge joints - Google Patents

Description

  The present invention relates to a drainage structure at a road bridge joint.

  In patent document 1, the expansion joint extended in the width direction installed in the road bridge joint part is provided with a pair of joint members, and has the vertical plate part installed so that the joint members may face each other. It describes a drainage structure when a water-permeable pavement is applied to the road surfaces on both sides sandwiching the expansion joint. The drainage structure is a bridge shaft between the joint members by forming opposing through holes in the vertical plate portions of the pair of joint members and connecting the through holes with a flexible connecting pipe. By providing a vertical drainage channel that drains in the direction, and further by providing a horizontal channel component plate with a certain gap from the vertical plate part on the back of the vertical plate part of the joint member on the road bridge vertical gradient high position side, A horizontal drainage channel that drains in the width direction is provided. In addition, a large number of through holes for allowing water to pass through are formed in the horizontal water channel constituting plate.

  According to this drainage structure, rainwater that has penetrated into the permeable pavement that forms the road surface on the high side of the road bridge vertical gradient flows into the horizontal water channel from the through hole of the horizontal water channel component plate, and on the road bridge vertical gradient high position side. Enters the vertical drainage channel from the through hole opened in the vertical plate portion of the joint member, flows out from the through hole opened in the vertical plate portion of the joint member on the lower side of the longitudinal gradient through the vertical drainage channel, and It is discharged to the permeable pavement that spreads behind the joint member.

JP-A-10-237806

  Snow bridges in snowy cold districts such as Hokkaido often have snowplow snow plows caught on joint members during snow removal work and damage the joint members and the road surface. To prevent this, plow guide plates on both or one of the joint members Is installed. The front end surface of the plow guide plate is welded to the vertical plate portion of the joint member, and the upper end surface of the plow guide plate gradually increases toward the front and is formed to be the same height as the upper end of the joint member. With this shape, the plow guide plate guides the snow plow of the snowplow onto the joint member.

  In general, the road surfaces on both sides of the expansion joint are made of concrete, but in snowy cold areas where plow guide plates are installed, the lower layer can be made of concrete and the upper layer can be made of asphalt pavement. Many. This is because the asphalt pavement surface is easily worn by a tire chain or the like, whereas the concrete pavement surface is hardly worn, and a step is likely to occur at the boundary between the asphalt pavement surface and the concrete pavement surface. If there is a step on the road surface, the vehicle traveling performance is significantly deteriorated, and the snow plow is caught by the step, and the concrete pavement surface is destroyed. To avoid this, asphalt pavement is also applied to the road surface on both sides of the expansion joint in snowy cold regions.

  By the way, when water-permeable asphalt pavement is applied to the road surfaces on both sides of the expansion joint, rainwater penetrates the water-permeable pavement and moves down the impervious concrete below it along the road bridge longitudinal gradient. It flows to the position side. However, since the flow is blocked by the joint member extending in the width direction at the road bridge joint, water accumulates at the back of the vertical plate portion of the joint member. If this water continues to collect without being drained, the adhesive strength between the asphalt and the aggregate is remarkably reduced in the water-permeable pavement, leading to early breakage of the water-permeable pavement. In addition, the accumulated water freezes in winter, and cracks occur in the permeable pavement on the back of the vertical plate due to the volume expansion. Further, if the expansion joint continues to come into contact with water, the influence of the road surface anti-freezing agent is also added, and the steel in the member rusts, causing deterioration and breakage of the expansion joint itself.

  On the other hand, in the invention described in Patent Document 1, it is difficult to install a horizontal water channel component plate for an expansion joint in a snowy cold region because a plow guide plate is provided, Since the horizontal water channel formed by the horizontal water channel constituting plate and the vertical plate part creates a gap on the road surface, there is a problem that the snow plow of the snowplow gets caught in this gap and breaks the horizontal water channel constituting plate and the expansion joint. In addition, when the vehicle passes through this gap, the tires are subject to shock and vibration and noise are generated. The upper part of this horizontal waterway is open, so it is easy to clog the earth and sand, and maintenance management such as removal of earth and sand is necessary. There were problems such as becoming.

  Therefore, in order to solve the above-mentioned problems, the present invention enables an expansion joint provided with a plow guide plate to drain rainwater penetrating into the pavement and collecting on the back of the vertical plate portion of the joint member in the longitudinal direction of the road bridge joint. It is.

That is, the invention of this application is installed at the road bridge joint so as to constitute the expansion joint of the road bridge, and a pair of joint members having vertical plate portions facing each other and extending in the longitudinal direction of the joint,
A plow guide plate that is provided on the back of the vertical plate portion and is disposed at intervals in the longitudinal direction of the seam of the road bridge to guide the snow plow of the snowplow so as to pass over the expansion joint;
Post-cast concrete placed on the back of the vertical plate,
In the back part of the vertical plate part, provided on the post-cast concrete, pavement forming a road surface,
A water guide that is arranged at the boundary between the post-cast concrete and the pavement, extends in the longitudinal direction of the road bridge joint along the back of the vertical plate part, and introduces water penetrating from the pavement into the end of the road bridge. With a member,
The water guiding member is embedded under a road surface.

  Therefore, according to the present invention, rainwater that has penetrated into the pavement on the back of the joint member of the expansion joint on which the plow guide plate is installed flows into the water guide member installed on the back surface of the vertical plate part of the joint member, and the road inside the water guide member It flows to the low position side according to the bridge crossing gradient. Therefore, since rainwater is drained without accumulating on the back of the joint member, it is possible to prevent deterioration and damage of the pavement and the expansion joint on the back of the joint member. Moreover, since the water guide member is embedded under the road surface, the front end of the plow guide plate can be connected to the back surface of the joint member, and the snow plow can be smoothly guided onto the joint member. Further, since there is no need to provide a gap on the road surface, the drainage channel is clogged with earth and sand, and vibration and noise when the vehicle is passing can be prevented.

  In a preferred embodiment, the water guide member penetrates the plow guide plate.

  As described above, according to the present invention, rainwater that has permeated into the pavement on the back of the joint member of the expansion joint on which the plow guide plate is installed flows into the water guide member installed on the back surface of the vertical plate part of the joint member. Since the inside of the member flows to the low position side according to the road bridge crossing gradient, rainwater collected at the back of the joint member can be drained. And since the water guide member is embed | buried, the function of a plow guide plate is not impaired.

It is a longitudinal cross-sectional view in the joint part of the road bridge which has the portal expansion joint which concerns on Embodiment 1 of this invention. It is the top view seen from the upper part of the road bridge joint part before the post-cast concrete of the same form is laid. It is the perspective view made into the partial cross section which shows the drain pipe joint part of the same form. It is a longitudinal cross-sectional view in the joint part of the road bridge which has a T-type expansion joint which concerns on Embodiment 2 of this invention. It is the top view seen from the upper part of the road bridge joint part before the post-cast concrete of the same form is laid. It is a longitudinal cross-sectional view which shows the principal part of invention which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

<Embodiment 1>
This embodiment is shown in FIGS.

  As shown in FIG. 1, 1 is a road bridge body, 2 is a gap between the road bridge bodies 1, 3 is an expansion joint installed above the gap 2, and 4 is a drain pipe serving as a water guiding member. A plow guide plate 5 that guides the snow plow of the snowplow to pass over the expansion joint 3 is installed on the front side of the expansion joint 3 in the vehicle traveling direction, and the wheel load applied to the expansion joint 3 when the vehicle is passing on the opposite side. The rib plate 6 for dispersing the is installed. A notch 7 for installing the expansion joint 3, the plow guide plate 5 and the rib plate 6 is formed at opposite ends of the road bridge body 1, and the notch 7 includes the expansion joint 3 and the plow. After the guide plate 5 and the rib plate 6 are installed, post-cast concrete 8 is placed. Further, a water-permeable pavement 9 is provided on the post-cast concrete 8 to form a road surface.

  The expansion joint 3 includes a pair of joint members 10. Both joint members 10 each include a vertical plate portion 11 extending in the longitudinal direction of the joint and a horizontal plate portion 12 provided at the upper end thereof. Both joint members 10 are provided so that the vertical plate portions 11 face each other in the direction of the bridge axis, and the respective horizontal plate portions 12 protrude toward each other, and their tips have a gap 13 therebetween. It is formed in a meshing tooth profile.

  The front end surface of the plow guide plate 5 is coupled to the vertical plate portion 11 and extends in the bridge axis direction with the plate surface vertical. The upper surface of the plow guide plate 5 is inclined so as to gradually increase toward the front end, and the foremost end of the upper surface is the same height as the horizontal plate portion 12. On the front end surface of the plow guide plate 5 coupled to the vertical plate portion 11, a notch portion 14 is formed at a position corresponding to the boundary between the post-cast concrete 8 and the water-permeable pavement 9. In addition, a through hole 15 is formed in the plow guide plate 5, and a thread 16 is passed through the through hole 15. The through bars 16 are connected to other reinforcing bars and are fixed to the road bridge body 1. In each figure, other reinforcing bars are omitted. As shown in FIG. 2, the plow guide plates 5 are spaced apart in the longitudinal direction of the road bridge joint, and the thread 16 extends through the plurality of plow guide plates 5 in the longitudinal direction of the road bridge joint. ing.

  The rib plate 6 has a front end surface coupled to the vertical plate portion 11 and extends in the bridge axis direction with the plate surface vertical. The upper surface of the rib plate 6 is the same height as the upper surface of the post-cast concrete 8. A notch portion 17 is formed at the upper corner of the front end surface of the rib plate 6 that is coupled to the vertical plate portion 11. Further, a through hole 18 is formed in the rib plate 6, and a thread 16 is passed through the through hole 18 in the same manner as the through hole 15 of the plow guide plate 5. As shown in FIG. 2, the rib plates 6 are arranged at intervals in the longitudinal direction of the road bridge joint, and the thread 16 penetrates the plurality of rib plates 6 and extends in the longitudinal direction of the road bridge joint.

  As shown in FIG. 1, the drain pipe 4 is welded to the back surface of the vertical plate portion 11 so as to be fitted to the notch portion 14 of the plow guide plate 5 or the notch portion 17 of the rib plate 6. It is provided at the boundary between the concrete 8 and the water-permeable pavement 9. Moreover, as shown in FIG. 2, the drain pipe 4 is provided so that it may extend in the longitudinal direction of a road bridge joint, and the downstream end is connected to the drain at the end of the road bridge.

  As shown in FIG. 3, the drain pipe 4 has a joint 20 at the joint 19 of the joint member 10. The joint 21 has a U-shaped cross section, and its front end surface is connected to the vertical plate portion 11. The drain pipe 4 is connected by fitting the joint 21 to the two adjacent drain pipes 4 from the side of the joint 20. As a result, when the post-cast concrete 8 is placed in the cutout portion 7 to the same height as the upper surface of the drainage pipe 4, the joint 20 of the drainage pipe 4 is not blocked by the post-cast concrete 8. The drain pipe 4 has a large number of through holes 22 formed on at least the upper surface thereof, and rainwater that has permeated into the permeable pavement 9 flows into the drain pipe 4 through the through holes 22.

  A dustproof material 23 is installed under the horizontal plate portion 12 to prevent sand and the like from entering through the gap 13 in the horizontal plate portion. An internal protective plate 24 is installed under the dustproof material 23, and further functions to increase the durability of the elastic seal material 25 installed therebelow. The elastic sealing material 25 is fixed by a high elastic backup material 26. Reference numeral 27 denotes a flexible ridge that is supported by the vertical plate portion 11 and suspended.

  Therefore, in the case of the expansion joint 3 provided with the drain pipe 4 as described above, it penetrates into the water-permeable pavement 9, and the boundary between the water-permeable pavement 9 and the post-cast concrete 8 moves to the lower position side according to the road bridge longitudinal gradient. The rainwater that has flowed and penetrated to the back of the joint member 10 flows into the drainage pipe 4 from the through hole 22 of the drainage pipe 4 attached to the back surface of the vertical plate portion 11, and the inside of the drainage pipe 4 is low according to the road bridge crossing gradient. It flows to the position side and flows into the drainage basin at the end of the road bridge. Therefore, even if the expansion joint 3 is provided with the plow guide plate 5, rainwater that has penetrated into the water-permeable pavement 9 does not collect on the back of the joint member 10. Moreover, the function of the plow guide plate is not impaired.

<Embodiment 2>
This embodiment is shown in FIGS.

  The present embodiment is the same as the first embodiment, and the joint member 10 is formed such that the convex portions projecting laterally on both sides and the concave portions relatively recessed are alternately arranged in the longitudinal direction. It is characterized by having a double-toothed lateral plate portion 28.

  Therefore, even if the expansion joint 3 is composed of the joint member 10 having the above-described double-toothed lateral plate portion 28, the drainage pipe 4 does not impair the function of the plow guide plate 5, and the water-permeable pavement 9. Rainwater that has permeated into can be drained.

<Embodiment 3>
This embodiment is shown in FIG.

  The present embodiment is similar to the first embodiment, and is characterized in that a water guide tape 29 is provided as a water guide member so as to penetrate the notch portion 14 of the plow guide plate 5.

  The notch portion 14 of the plow guide plate 5 is formed at the boundary between the post-cast concrete 8 and the water-permeable pavement 9 so as to be positioned on the post-cast concrete 8.

  The water guide tape 29 is a tape having a porous structure made of a nonwoven fabric or the like. The water guide tape 29 can absorb water penetrating from the water-permeable pavement 9 by a capillary phenomenon caused by the porous structure. Two water guide tapes 29 pass through the plow guide plate 5 through the notch 14 and extend in the width direction, one of which is attached to the surface of the post-cast concrete 8 and the other one. Is attached to the back of the vertical plate 11. The downstream end of the water guide tape 29 is connected to a drain at the end of the road bridge.

  Further, when the rib plate 6 is arranged instead of the plow guide plate 5, the surface of the post-cast concrete 8 is not formed in the rib plate 6 but is cast to the same height as the upper end surface of the rib plate 6. The water guide tape 29 may be disposed on the surface.

  The water guide tape 29 may be disposed only on either the surface of the post-cast concrete 8 or the back surface of the vertical plate portion 11.

  Therefore, even in the drainage structure constituted by the water conveyance member using the water conveyance tape 29 as described above, it penetrates into the water permeable pavement 9 and the boundary between the water permeable pavement 9 and the post-cast concrete 8 is lowered according to the road bridge longitudinal gradient. The rainwater that flows to the position side and penetrates to the back of the joint member 10 is sucked into the water guide tape 29 provided through the notch 14 and guided to the low position side of the road bridge crossing gradient by the water guide tape 29. , Led to the drainage basin at the end of the road bridge.

  Therefore, even if the expansion joint 3 is provided with the plow guide plate 5, rainwater that has penetrated into the water-permeable pavement 9 does not collect on the back of the joint member 10. Moreover, the function of the plow guide plate is not impaired.

  The present invention can also be applied to the case where the plow guide plate 5 is installed on both sides of the joint member 10. Further, the present invention can be applied to a road bridge joint portion where the plow guide plate 5 and the rib plate 6 are not provided. In the present invention, the form of the expansion joint 3 is not limited, and the vertical plate portion 11 may be a corrugated plate that is bent zigzag and extends in the longitudinal direction of the road bridge joint.

DESCRIPTION OF SYMBOLS 3 Expansion joint 4 Water guide member 5 Plow guide plate 8 Post-cast concrete 9 Pavement 10 Joint member 11 Vertical plate part

Claims (2)

A pair of joint members installed at the road bridge joint so as to constitute an expansion joint of the road bridge, and having a vertical plate portion facing each other and extending in the longitudinal direction of the joint;
A plow guide plate that is provided on the back of the vertical plate portion and is disposed at intervals in the longitudinal direction of the seam of the road bridge to guide the snow plow of the snowplow so as to pass over the expansion joint;
Post-cast concrete placed on the back of the vertical plate,
In the back part of the vertical plate part, provided on the post-cast concrete, pavement forming a road surface,
A water guide that is arranged at the boundary between the post-cast concrete and the pavement, extends in the longitudinal direction of the road bridge joint along the back of the vertical plate part, and introduces water penetrating from the pavement into the end of the road bridge. With a member,
A drainage structure for a road bridge joint, wherein the water guiding member is buried under a road surface. In claim 1,
A drainage structure of a road bridge joint, wherein the water guide member penetrates the plow guide plate.

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