JP2013053434A - Water cut-off structure and method of road bridge joint part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cut-off structure of road bridge joint part that can be constructed easily and has excellent water cut-off performance.SOLUTION: Floor slabs (road bridge bodies) 1,1 on both sides of a joint gap 3 of a road bridge joint part (or road bridge bodies and bridge abutments on both sides of the joint gap) are fixed to a pair of support rails 17 extending in the longitudinal direction of the road bridge joint part. The pair of support rails 17 support a seal plate 18 for preventing water leakage to below the road bridge so as to be movable.

Description

  The present invention relates to a water stop structure and a water stop method for a road bridge joint.

  The joint of the road bridge is equipped with an expansion / contraction device that allows the displacement of the end of the road bridge body so that the vehicle can travel on the bridge surface without hindrance, and prevents water leakage from the bridge surface to the bottom of the road bridge. A water stop member is provided. For example, in Patent Document 1, an expansion / contraction device is configured by a pair of joint members each having a face plate (horizontal plate) and a web plate (vertical plate), and an upper portion serving as a water stop member is provided between the opposing web plates. It is described that a seal plate is provided, and a lower seal plate as a water stop member is further provided below the upper seal plate. Both the upper seal plate and the lower seal plate are fixed to the web plate with bolts or the like.

Japanese Patent No. 3499843

  It is effective for making the water stop more complete that the seal plate for the water stop is continuous over the entire length of the road bridge width. That is, if there is a seam in the seal plate, the end portions of the seal plate are overlapped and bonded with an adhesive, or the end portions of the seal plate are butted against each other so that another connection seal plate is straddled over both seal plates. Even if they are bonded together, adhesion is likely to be incomplete, and a gap is formed due to aging deterioration of the adhesive, and water leakage is likely to occur.

  In this regard, in Patent Document 1 described above, it is described that the seal plate is continuous over a plurality of web plates arranged in the longitudinal direction of the road bridge joint, but there is a problem that the construction is difficult. That is, in the construction, after arranging a plurality of web plates in the longitudinal direction of the road bridge joint portion, the seal plate is fixed to the web plate with a bolt or the like. However, fixing the seal plate to the inner surface of the web plate requires bolting from a narrow gap between the face plates, which makes the operation extremely difficult. Further, even when the seal plate is fixed to the back side of the web plate (post-cast concrete side), the anchor on the back side of the web boot and the existing reinforcing bars of the floor slab are in the way, and the work is difficult.

  In addition, when the existing seal plate is deteriorated or damaged, it is repaired (replaced), but the water stop after the repair tends to be incomplete, and the satisfactory solution to the water leakage problem at the road bridge joint has not been achieved. is the current situation.

  In other words, since the road bridge repair work is accompanied by traffic restrictions, avoid the full width construction (full traffic regulation) of the effective width normally, and construct the effective width in half so that partial traffic regulation is achieved. Has been. In that case, the seal plate installed in one half of the effective width and the seal plate installed in the other half are discontinuous at the center of the effective width. For this reason, both the seal plates are connected. However, as described above, it is difficult to complete the connection, and there is a problem that water leakage from the connecting portion is likely to occur.

  In addition, there is a problem that it is difficult to replace a deteriorated seal plate. That is, when the seal plate is fixed to the inner surface side of the opposed web plate with a bolt or the like, the operation of removing the bolt and removing the deteriorated seal plate, and the operation of inserting a new seal plate between the web plates and tightening the bolt Must be performed from a narrow gap between the faceplates. The series of operations is complicated and time-consuming, and is very difficult. This also hinders proper repair work.

  In addition, when the seal plate is fixed to the back side of the web plate with bolts or the like, it is necessary to scoop and remove post-cast concrete to remove the seal plate from the web plate, which is a large-scale construction. At the same time, repair work cannot be completed in a short time, and traffic regulation will take a long time.

  Then, this invention provides the water stop structure and water stop construction method of the road bridge joint part which solve the above problem.

  In order to solve the above-mentioned problems, the present invention changed the idea from the conventional idea of fixing the water-stopping member to an expansion device or the like, and made the water-stopping member a suspended movable type.

  That is, the water stop structure of the road bridge joint portion presented here extends in the longitudinal direction of the road bridge joint portion on the road bridge body on both sides of the road bridge joint portion or on the road bridge body and the abutment on both sides of the gap. A pair of support rails are fixed, and a water stop member for preventing water leakage under the road bridge is movably supported on the support rails.

In a preferred embodiment, the road bridge joint includes a telescopic device that allows displacement of the end of the road bridge body and allows the vehicle to travel on the bridge surface, and a primary water stop to prevent water leakage under the road bridge. Means are provided,
The water stop member supported by the support rail is located below the primary water stop means and constitutes a secondary water stop means.

Another aspect of the present invention is a water stop construction method for a road bridge joint for obtaining the above water stop structure,
A pair of support rails extending in the longitudinal direction of the seam portion are fixed to the road bridge main body on both sides of the gap of the road bridge joint, or to the road bridge main body and the abutment on both sides of the gap,
The water stop member for preventing water leakage from the gap between the gap and the road bridge is installed by being inserted between the gap between the pair of support rails from the longitudinal end of the road bridge joint.

  Further, another aspect of the present invention is a repair method, wherein the water stop member related to the water stop structure of the above-mentioned road bridge joint is moved in the longitudinal direction of the road bridge joint and extracted from the above-mentioned gap. A water stop member is installed between the pair of support rails from an end in the longitudinal direction of the road bridge joint, and is inserted and installed in the play.

  Therefore, according to the present invention, since the water stop structure for supporting the water stop member on the support rail is adopted, the water stop member is installed from the longitudinal end of the road bridge joint portion when the water stop member is installed. It is only necessary to insert it in the play between it and the construction becomes extremely simple. In repairing, the deteriorated water stop member may be pulled out from the longitudinal end of the road bridge joint to the side of the road bridge, and a new water stop member may be placed on the support rail and inserted in the play. Therefore, construction from a narrow gap between the face plates is unnecessary, the water stop member can be installed reliably, and if only the water stop member is repaired, there is no need to perform traffic regulation. An effect is obtained.

It is the perspective view made into the partial cross section which shows the road bridge joint part concerning Embodiment 1. FIG. It is sectional drawing which shows the secondary water stop means of the same form. It is the sectional view on the AA line of FIG. It is sectional drawing which longitudinally cut the road bridge joint part of the form with the centerline of the expansion-contraction apparatus. It is a perspective view which shows the edge part of the seal plate of the same form. It is a perspective view which shows the road bridge joint part which concerns on Embodiment 2 in a partial cross section, and abbreviate | omits one part. It is sectional drawing which shows another example of the movable support structure with respect to the support rail of a sealing plate.

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

<Embodiment 1>
In the joint portion of the road bridge shown in FIG. 1, 1 is a floor slab constituting the road bridge body, and 2 is a bridge pavement. Between the floor slabs 1 and 1, there is provided a gap 3 that allows deformation of the road bridge body such as expansion and contraction accompanying the temperature change of the road bridge body and vertical movement of the end of the beam. A telescopic device 5 is provided above the gap 3 of the roadway portion 4 to allow deformation of the road bridge body and smooth traffic on the road surface. An expansion / contraction device 7 connected to the expansion / contraction device 5 of the roadway portion 4 is provided between the play of the ground cover portion 6. Reference numeral 8 denotes post-cast concrete which is cast after the expansion devices 5 and 7 are installed at the road bridge joint.

  The telescopic device 5 of the roadway part 4 is comprised by a pair of joint member extended in the longitudinal direction (direction crossing a bridge axis) of a road bridge joint part. Each joint member is formed in an inverted L shape by a web plate (vertical plate) 11 and a face plate (horizontal plate) 12. On one side of the face plate 11, recesses and projections that go in and out in the bridge axis direction are alternately formed in the joint portion longitudinal direction. Both joint members are provided so that the web plates 11 and 11 face each other with a space therebetween, and the face plates 12 and 12 form corrugated gaps with the concave and convex portions facing each other. ing. In addition, since it is a well-known thing, although specific illustration is abbreviate | omitted, in the roadway part 4, the some web plate 11 of length 1-2m is installed in the seam part longitudinal direction.

  The expansion and contraction device 7 of the ground cover portion 6 includes a pair of joint members in which a face plate 13 is provided on the upper end of the same web plate 11 as the roadway portion 4, and gradually increases from the roadway portion 4 side toward the road bridge side end. It is arranged with a gradient so as to be. The face plates 13 and 13 extend straight in the longitudinal direction of the joint portion, and thus the clearance between the face plates 13 and 13 is also straight.

[Water stop structure]
A fixed primary water stop means is provided at the upper part between the web plates 11 and 11 (interval), and a movable secondary water stop means is provided at the lower part. The primary water stop means is formed by filling a rubber seal material 15 on a backup material 14 made of a sponge material or the like extending in the longitudinal direction of the joint. As shown in FIG. 2, the backup material 14 is supported by a support member 16 fixed to the inner surface of the web plate 11. The secondary water stop means is configured such that a seal plate 18 as a water stop member is movably supported on support rails 17 and 17 extending in the longitudinal direction of the joint portion fixed to the web plates 11 and 11. The specific structure of the secondary water stop means is shown in FIGS.

  As shown in FIG. 2, the support rail 17 has a rectangular cross section and is fixed to the inner surface side of the web plate 11 by bolts 19. Between the web plate 11 and the support rail 17, a water-stopping packing 21 is interposed. A slit 22 extending in the longitudinal direction of the joint is opened in the bottom wall of the support rail 17.

  The seal plate 18 is formed by bending a rubber plate into a U-shaped or V-shaped cross section. Each side portion of the seal plate 18 is passed through a slit 22 of the support rail 17, and a roller 23 is provided at the upper end portion. That is, as shown in FIG. 3, the seal plate 18 is provided with rollers 23 spaced apart in the longitudinal direction of the joint portion, and each roller 23 is positioned below the support rail 17 on both sides of the slit 22 of the support rail 17. It is movably engaged with the wall.

  As shown in FIG. 4, the seal plate 18 continuously extends from one ground covering portion 6 of the road bridge to the other ground covering portion (not shown). The seal plate 18 is lowest in the vicinity of the boundary between the roadway portion 4 and the ground cover portion 6 because of the road surface gradient of the roadway portion 4. The drain pipe 24 is coupled to the bottom of the seal plate 18 at the lowest position. A drain pipe 24 is coupled to the bottom of the seal plate 18 also on the center side of the roadway portion 4. A bellows-shaped water stop lid 25 shown in FIG. 5 is provided at the end of the seal plate 18 in the longitudinal direction of the joint portion so that rainwater does not flow out of the seal plate 18.

  According to the water stop structure, the rain water on the road surface is prevented from entering between the web plates 11 by the rubber seal material 15 of the primary water stop means. Even if rainwater enters between the web plates 11 due to aging deterioration of the rubber seal material 15, the rainwater is received by the seal plate 18 constituting the secondary water stopping means and is prevented from leaking under the road bridge. Rainwater received by the seal plate 18 flows on the seal plate 18 in the longitudinal direction of the seam and is discharged from the drain pipe 24. Since the seal plate 18 is continuous over the entire length of the road bridge width and is seamless, there is no problem of water leakage from the seal plate joint.

  Even if the water-stopping effect by the primary water-stop means is somewhat reduced due to the aging deterioration of the rubber seal material 15, the rain water on the road surface is basically blocked by the rubber seal material 15. Therefore, the amount of rainwater received by the seal plate 18 of the secondary water stop means is small and the rainwater is discharged to the drain pipe 24, so that it is avoided that the rainwater overflows in the seal plate 18.

[Water stop method]
The case of new construction will be described.

  As for the telescopic devices 5 and 7 of the roadway portion 4 and the ground covering portion 6, a support member 16 and a support rail 17 are fixed to each web plate 11. A roller 23 is attached to the seal plate 18.

  A notch 9 is formed in the floor slabs 1 and 1 of the road bridge joint. The telescopic devices 5 and 7 are installed at the road bridge joint, and an anchor (not shown) provided on the back surface of the web plate 11 is coupled to the existing reinforcing bar of the floor slab 1. Post-cast concrete 8 is placed in the notch step 9 on the back of the expansion devices 5 and 7.

  From the space between the face plates 12 of the expansion devices 5 and 7, the backup material 14 is inserted between the web plates 11 and supported by the support member 16. The back-up material 14 is filled with a rubber seal material 15 (installation of primary water stop means).

  On both sides of the road bridge (longitudinal end of the road bridge joint), both side portions of the seal plate 18 are bridged over the support rails 17 of the web plates 11 and 11. That is, the roller 23 of the seal plate 18 is engaged with the support rail 17 of the web plate 11. In this state, the roller 23 is rolled on the bottom wall of the support rail 17 and the seal plate 18 is inserted between the web plates 11 (gap). When the insertion of the seal plate 18 is completed, a stopper is provided on the support rail 17 to hold the seal plate 18 (installation of secondary water stop means).

  Therefore, it is not necessary to insert the seal plate 18 between the web plates 11 from the play between the face plates 12 at the construction site of the road bridge. Moreover, the operation | work which fixes the sealing board 18 to the web plate 11 with a volt | bolt, an adhesive agent, etc. is unnecessary. Therefore, it becomes advantageous for quick construction.

  In some cases, post-cast concrete is placed after the primary water stop means and the secondary water stop means are installed.

  Next, when the desired water stop effect cannot be obtained due to deterioration or damage of the rubber seal material 15 constituting the primary water stop means or the seal plate 18 constituting the secondary water stop means, it is necessary to replace them. The repair construction will be explained.

  First, in repairing the primary water stop means, traffic regulation is applied, the damaged rubber seal material 15 and the backup material 14 are removed from the space between the face plates 12, and a new backup material 14 is packed between the web plates 11. Then, the rubber sealing material 15 is filled.

  However, when the traffic regulation cannot be applied, or when the rubber seal material 15 and the backup material 14 cannot be removed upward from the play between the face plates 12, the seal plate 18 of the secondary water stop means is connected to the road bridge side by the support rail 17. The damaged rubber seal material 15 and backup material 14 can be dropped below the gap 3 and removed. Then, the backup material 14 can be packed from the side of the road bridge and the rubber seal 15 can be filled with the nozzle.

  In repairing the secondary water stop means, the damaged seal plate 18 is extracted from between the web plates 11 to the side of the road bridge. In this case, since the seal plate 18 is engaged with the support rail 17 by the roller 23, the extraction operation can be performed smoothly. Then, in the same manner as at the time of new construction, from the side of the road bridge, the roller 23 of the new seal plate 18 is engaged with the support rail 17 and inserted between the web plates 11, and the seal plate 18 is inserted into the support rail 17. Hold.

  Therefore, in the repair of the secondary water stop means, it is not necessary to extract or install the seal plate 18 from the road surface, and the seal plate 18 can be replaced without restricting traffic. Moreover, also in repair of a primary water stop means, as mentioned above, it can construct without applying traffic regulation.

<Embodiment 2>
This embodiment is shown in FIG. This embodiment is a case in which a pair of corrugated plates 32 that are bent and extended in a zigzag manner in the longitudinal direction of the seam are used as the expansion device 31.

  That is, the pair of corrugated plates 32 are disposed to face each other so as to form a corrugated space. A bottom plate 33 is fixed to the bottom of the corrugated plate 32 on the back side. The corrugated play is provided with an upper seal plate 34 having a U-shaped or V-shaped cross section as primary water stopping means, and both side portions of the upper seal plate 34 are fixed to the corrugated plate 32. An anchor 35 is provided on the back of the corrugated plate 32.

  Thus, a lower seal plate 18 having a U-shaped or V-shaped cross section as a secondary water stop means is provided below the expansion / contraction device 31. The lower seal plate 18 is movably supported by rollers on the support rail 17 as in the first embodiment. The support rail 17 is fixed to a support plate 36 fixed to the back of the corrugated plate 32 and the bottom plate 33. The lower seal plate 18 extends continuously over the entire length of the road bridge width, as in the first embodiment.

  Therefore, also in this embodiment, since the lower seal plate 18 is supported by the support rail 17 with respect to the secondary water stop means, the same operational effects as those of the first embodiment can be obtained.

  In the above embodiment, the seal plate 18 is movably supported on the support rail 17 having a rectangular cross section by a roller. However, the movable support means is not necessarily limited to the above embodiment. For example, as shown in FIG. Alternatively, sliders 37 that engage with the support rails 17 may be provided on both sides of the seal plate 18.

  Moreover, although the said embodiment is related to the structure of the seam part of road bridge main bodies, this invention is applicable also to the seam part of a road bridge main body and an abutment. Further, the type of the road bridge body is not limited to the steel bridge, and the present invention can be applied to other types such as a concrete girder bridge and a steel deck bridge.

1 Floor slab (road bridge body)
2 Bridge pavement 3 Free play 4 Roadway part 5 Stretching device 6 Ground cover part 7 Stretching device 8 Post-cast concrete 11 Web plate 12 Face plate 17 Seal plate 18 Support rail

Claims (4)

  A pair of support rails extending in the longitudinal direction of the road bridge joint is fixed to the road bridge main body on both sides of the road bridge joint or between the road bridge main body and the abutment on both sides of the play bridge. A water stop structure for a road bridge joint, wherein a water stop member for preventing water leakage is movably supported. In claim 1,
The road bridge joint is provided with a telescopic device that allows displacement of the end of the road bridge body and allows the vehicle to travel on the bridge surface, and primary water stop means for preventing water leakage under the road bridge,
The water stop structure of the road bridge joint portion, wherein the water stop member supported by the support rail is located below the primary water stop means and constitutes a secondary water stop means. A pair of support rails extending in the longitudinal direction of the seam portion are fixed to the road bridge main body on both sides of the gap of the road bridge joint, or to the road bridge main body and the abutment on both sides of the gap,
A water stop member for preventing water leakage from the gap between the gap and the road bridge is installed by being inserted between the gap between the pair of support rails from the longitudinal end of the road bridge joint. Water stop method for bridge joints.   The water stop member according to the water stop structure of the road bridge joint portion according to claim 1 is moved in the longitudinal direction of the road bridge joint portion and extracted from the gap, and a new water stop member is removed along the length of the road bridge joint portion. A water-stop construction method for a road bridge joint portion, wherein the water bridge is installed between the pair of support rails from an end in a direction and inserted into the play.

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