JP6378043B2 - Construction method for filling materials for bridge joints - Google Patents

Description

The present invention relates to a filling material used for a joint portion of a bridge. In particular, the present invention relates to a filling material disposed in a groove-like space between joint members in a joint portion of a road bridge.

In road bridges, bridge girder (floorboard) ends are placed on bridge piers and abutments. Here, an elastic member called a joint is disposed between the ends of the bridge girder (girder end) or between the end of the girder and the abutment. The joint absorbs bridge girder shrinkage, load changes, and earthquake displacement due to temperature changes.

In addition to dimension absorption, the joint is required to have a seal such as rainwater between the joint members and a noise prevention function. In recent years, the following joints called modular joints have been developed.

For example, Patent Literature 1 discloses a joint for a bridge in which a water stop rubber and a soundproof material are provided on a joint member (middle beam). In the bridge joint, the soundproof material is engaged with an engagement portion of the middle beam. It is disclosed that the soundproofing material can be securely held in the joint.

JP 2004-353305 A

In the following description, a member corresponding to the soundproofing material in Patent Document 1 will be described as a “sintering material” that is a superordinate concept. The filling material is an elastic member provided so as to fill a gap between the joint members, and also functions as a soundproofing material when the filling material also has soundproofing properties.
In the joint for bridges as in the above-mentioned document, there are the following difficulties when attaching the filler to the joint member, and improvements are required. When installing the filling material after the joint member is attached to the end of the beam, or when repairing the damaged filling material after use on the road, push the filling material into the gap between the joint members. It is necessary to install it. This operation is performed by using the elasticity of the filling material, but the filling material is easily caught on the side surface of the joint member, and the workability is poor.

In addition, due to the difficulty of the push-in operation, it is difficult to arrange the finished shape of the soundproof material, that is, the finishing of the filling material tends to be messy. Further, since the filling material is a member having elasticity, that is, stretchability, the filling material is attached in a state where the filling material is stretched or shrunk in the longitudinal direction of the filling material during the pushing operation. There is a risk of adversely affecting the secure installation of the filling material.

An object of the present invention is to improve the workability of a filling material used in a bridge joint.

As a result of intensive studies, the inventor has provided double-sided tape and tape-like release paper on both sides of the elastic rod-like padding material, which improves the handling of the padding material. As a result, it was found that the workability was improved, and the present invention was completed.

The present invention is a method for constructing a bridging joint filling material that is fixed so as to straddle the joint member in a groove-like space between adjacent joint members in a bridge joint portion of a road bridge, The padding material is formed in a square bar shape by a foamed resin material having elasticity, and double-sided tape is attached to the side surfaces on both sides of the padding material along the longitudinal direction of the padding material over the entire length. One side of the double-sided tape is affixed to the side surface of the filling material, and the other side of the double-sided tape is covered with a tape-like release paper that does not substantially expand and contract , The method for constructing the filling material is a step of preparing the filling material so that the width of the filling material is larger than the width of the grooved space, leaving the release paper on both sides of the filling material, While compressing the filling material in the width direction, The step of pushing into the groove-like space between the int members, the tape-like release paper in the state where the filling material is arranged at a predetermined position and the filling material is held by the elasticity of the foamed resin material following the pushing step. This is a method for constructing a bridge joint filler for bridges, which includes a step of pulling out the groove from the groove-like space, sticking the double-sided tape to the joint member, and fixing the filler to the joint member (first invention).

In the first invention, at least one of the double-sided tape, and release paper covering the double-sided tape, at least one end between filling material, is provided in such a way as to wrap around the end face from the side between filling material In the pushing step, it is preferable that the step of pushing in the interstitial material is performed in a state where the part of the release paper provided on the end face is peeled from the double-sided tape and the peeled part is bent in the pulling direction (second invention). ).

According to the construction method (first invention ) of the bridge joint filler for bridges according to the present invention, the workability of the work of pressing and fixing the filler between the joint members is improved. Moreover, it is prevented that it is constructed in a state where the filling material expands and contracts during construction.

Further, in the case of the second invention , it is possible to connect the interlining materials in the longitudinal direction, and to increase the strength of the intercalating material construction, and to pull out a part of the release paper provided on the end face It is possible to increase the efficiency of the work of pulling out the release paper at the time of construction by providing the work in a state bent in the direction.

The perspective view and sectional drawing of the filling material of 1st Embodiment. The cross-sectional schematic diagram which shows the construction method which attaches the filling material to 1st Embodiment to a joint part. The perspective view of the edge part of the filling material of 2nd Embodiment. The perspective view which shows the state which folded the release paper when constructing the filling material of 2nd Embodiment. The perspective view of the edge part of the filling material of 3rd Embodiment. The perspective view which shows the state which folded the release paper when constructing the filling material of 3rd Embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings, taking as an example a filling material used in a modular joint for a road bridge as described in Patent Document 1. In addition, this invention is not limited to the separate embodiment shown below, The form can also be changed and implemented. For example, the filling material of the following embodiments can be used not only for a modular joint but also for other types of joints.

In FIG. 1, the perspective view and sectional drawing of the filling material of 1st Embodiment are shown. The rod-shaped filling material 1 is formed in a square bar shape by a foamed resin material having elasticity. Double-sided tapes 2 and 2 are attached to the side surfaces of both sides of the filling material 1 along the longitudinal direction of the filling material 1. One side of each double-sided tape 2 is affixed to the side surface of the filling material 1, and the other side of the double-sided tape 2 is covered with a tape-like release paper 3. The release paper 3 is adhered to the double-sided tape 2 in a peelable state.

Examples of the foamed resin material constituting the filling material 1 include foamed rubber, foamed urethane resin, and other foamed resin compositions. The foamed resin material may be configured by mixing rubber or resin. Since the filler is a member exposed to the external environment, it should be composed of a foamed composition containing a rubber having excellent weather resistance, such as chloroprene rubber (CR) and ethylene propylene diene rubber (EPDM). Is preferred. The elasticity of the foamed resin material is adjusted in consideration of the degree of elasticity required for the filling material.

As the cell structure of the foamed resin material constituting the filling material 1, various cell structures can be adopted as necessary. Examples of the cell structure include a closed cell structure, an open cell structure, and a semi-open cell structure in between. The foaming ratio and the like of the foamed resin material are adjusted so as to achieve the intended function and elasticity. When the padding material 1 is provided with a soundproofing function and the padding material 1 is provided as a soundproofing material, it is preferable that the foamed resin material has an open cell structure or a semi-open cell structure. Alternatively, when it is desired to provide the sealing material 1 with a sealing function against rainwater or the like, it is preferable that the foamed resin material has a closed cell structure or that a skin layer is left on the upper surface or the lower surface of the packing material 1.

The filling material 1 of the present embodiment is formed in the shape of a square bar having a rectangular cross section.
Typically, the width of the cross-section of the filling material is about 40 to 100 mm, the height is about 30 to 100 mm, and the length is about 30 cm to 2 m. The form of the filling material is not limited to the form of a square bar as in the present embodiment, and may be a shape with chamfered or rounded corners as in the embodiments described later, and the side or upper surface. Any form may be used as long as grooves and protrusions are provided on the lower surface, that is, a rectangular bar form.

Double-sided tape 2 and tape-like release paper 3 are provided along the longitudinal direction of the filling material 1 on both side surfaces of the square bar shape of the filling material. Preferably, the double-sided tape 2 and the release paper 3 are provided over the entire length of the filling material. In particular, it is particularly preferable that the double-sided tape 2 and the release paper 3 are provided continuously over the entire length of the filling material 1 because the filling material is easily maintained in a rod shape and does not break down and improves the handleability.

As the double-sided tape 2, a tape-like base material coated with an adhesive can be used. Moreover, you may use what formed the adhesive in tape shape without using a base material, and was used as the double-sided tape. As the pressure-sensitive adhesive, it is particularly preferable to use a material excellent in adhesiveness to a filling material or a counterpart member, for example, an acrylic pressure-sensitive adhesive.

On the side surfaces on both sides of the filling material 1, one adhesive surface of the double-sided tape 2, 2 is attached to a predetermined position on the side surface of the filling material. The other adhesive surface of the double-sided tape 2 is covered with a tape-shaped release paper 3. The release paper 3 is adhered to the other adhesive surface of the double-sided tape 2, and the other adhesive surface does not adhere to other members or the like until the filling material 1 is manufactured and applied. Can play a protective role. As will be described later, the release paper 3 is peeled off from the double-sided tape 2 in the process of applying the filling material 1. As the release paper 3, for example, paper coated with a silicone release agent or the like can be used. As the release paper 3, release paper based on paper that does not substantially have elasticity can be used.
The tape-shaped release paper 3 may be the same size (width) as the double-sided tape, or may be provided wider than the double-sided tape 2.

The filling material 1 can be used as a filling material for a bridge joint used in a bridge joint portion of a road bridge such as a modular joint. The filling material 1 is arranged in the groove-like space S between the joint members 4 and 4 adjacent to each other in the joint portion. The filling material 1 is fixed so as to straddle the joint members 4 and 4 adjacent to the grooved space S by double-sided tape provided on the side surfaces of both sides. FIG. 2 (e) shows a state in which the filling material 1 is disposed and fixed in the groove-like space between the joint members 4 and 4 in a sectional view.
In this state, the filling material 1 is required for the filling material as needed for the joint portion to be applied, such as soundproofing, sealing rainwater, and preventing dust accumulation while deforming according to the expansion and contraction deformation of the joint portion. Fulfills the function.

The construction method of the filling material 1 in the above embodiment will be described. FIG. 2 is a diagram illustrating a process of applying a filling material between joint members in a modular joint as disclosed in Patent Document 1. In FIG. 2, only one set of joint members 4 and 4 (members described as “middle beam” in Patent Document 1) and only the waterstop rubber 5 among the constituent members of the modular joint. The other components are not shown in the figure. Even if it is between other sets of joint members, or the joint members have other structures, the filling material 1 may be similarly applied.

As shown in FIG. 2A, the joint members 4 and 4 extend in the width direction of the bridge (the depth direction on the paper surface) so as to be spaced a predetermined distance in the bridge axis direction (the left-right direction in the drawing). . In the present embodiment, a substantially U-shaped waterstop rubber 5 is provided so as to straddle the joint members 4, 4, and rainwater or the like that has entered between the joint members 4, 4 by the waterstop rubber 5, It is designed not to leak downward. A groove-shaped (saddle-shaped) space S is formed between the joint members 4 and 4 so as to be surrounded by the flanges 41 and 41 on the upper side of the joint member and the waterproof rubber 5. The filling material 1 is disposed and fixed in the groove-like space S through the following steps.

As shown in FIG. 2A, the filling material 1 is prepared so that the width of the filling material 1 is larger than the width of the groove-shaped space S, that is, the width between the joint member flange portions 41 and 41. . By doing in this way, when the filling material 1 is attached, the filling material is compressed in the bridge axis direction, and the attachment becomes more reliable.

As shown in FIG. 2 (b), compressing the filling material 1 in the width direction of the filling material (left and right direction in FIG. 2) while leaving the release papers 3 and 3 attached to the filling material 1. Meanwhile, the filling material 1 is pushed into the groove-shaped space S. At this time, since the release papers 3 and 3 are left on both sides of the interstices, the interstices can be pushed in while compressing the interstitial materials using the release papers 3 and 3 as a guide. It is suppressed from being caught by the part, and the insertion operation is facilitated.

Further, since the release sheets 3 and 3 are left on both sides of the filling material, expansion and contraction in the length direction of the filling material 1 is suppressed. Therefore, it is possible to prevent the filling material from expanding and contracting in the length direction during the insertion operation, and to push in the filling material only in the compressed state in the width direction, thereby improving the construction quality.

It adjusts so that the whole filling material 1 may be arrange | positioned in the predetermined position of the groove-shaped space S (FIG.2 (c)). Also at this time, since the release papers 3 and 3 are still left, the double-sided tape does not stick and it is easy to finely adjust the position.

In a state where the filling material 1 is inserted at a predetermined position, the release papers 3 and 3 are peeled off from the double-sided tape, pulled out from the groove-shaped space S and removed (FIG. 2D). The release paper 3 can be removed by folding the end portion substantially upward and sequentially pulling it upward from the end portion. When the release sheets 3 and 3 on both sides of the filling material are removed, the double-sided tapes 2 and 2 are exposed and adhere to the flange 41 and the waterproof rubber 5 of the joint member 4, and the filling material 1 is joined to the joint member at that position. 4 (FIG. 2E).

In order to smoothly remove the release paper 3, the end of the release paper 3 is folded upward in advance prior to the operation of pushing in the intercalating material, and is peeled off from the folded end during the removal operation. It is preferable to perform the operation. The folding direction may be folded in the direction in which the release paper is pulled out. The release papers 3 and 3 may be removed by removing the release papers on both sides at the same time. However, it is preferable to perform the release paper removal operation for each side because the attachment position of the interstitial material can be accurately determined.

The effect of the filling material 1 of the said embodiment is demonstrated.
Since the double-sided tapes 2 and 2 are attached to the side surfaces on both sides along the longitudinal direction of the filling material 1 and the double-sided tapes 2 and 2 are covered with the release papers 3 and 3, The release papers 3 and 3 are attached to both side surfaces of the filling material 1. Therefore, the stick-shaped form of the filling material 1 is easily maintained by the stiffness of the release paper. That is, since the release papers 3 and 3 are substantially not stretchable, the bending material 1 is prevented from being bent and deformed in a direction perpendicular to the longitudinal direction.

If the release paper 3 is not provided on both sides of the filling material, the elastic filling material is freely deformed into a string shape, so that it is difficult to push it into the grooved space S at a certain height. Although the appearance quality of construction is likely to deteriorate, in the interlining material 1 in the above embodiment, the rod-like form of the intercalating material is firmly maintained, and it is easy to push into the grooved space S at a certain height.
Moreover, if the rod-like form of the filling material 1 is maintained, the handling property at the time of transporting or storing the filling material 1 is improved.
From the viewpoint of maintaining the rod-like form of the filling material, the release papers 3 and 3 are preferably continuous over the entire length of the filling material 1.

Further, if the operation of pushing into the groove-shaped space S while leaving the release papers 3 and 3 is performed, the release papers 3 and 3 reduce friction with the joint member, and the release paper 3 serves as a guide and a filling material. Make the pushing operation of 1 easier. Even in the pushed state, the position of the filling material 1 can be finely adjusted as long as the release paper remains. And since the release papers 3 and 3 are substantially non-stretchable, it is possible to effectively suppress the interposing material 1 from being pushed in while being stretched in the longitudinal direction.

Then, with the intercalating material placed in a predetermined position, the tape-shaped release paper is pulled out from the groove-shaped space, the double-sided tape is adhered to the joint member, and the intercalating material is fixed to the joint member. The installation of the filling material is simple and reliable, and the construction quality is improved.

The present invention is not limited to the above embodiment, and can be implemented with various modifications. Other embodiments of the present invention will be described below. However, in the following description, portions different from the above embodiment will be mainly described, and detailed descriptions of the same portions will be omitted. In addition, the embodiments described below can be implemented by combining some of them or replacing some of them.

In FIGS. 3 and 4, the end portion of the filling material of the second embodiment is shown enlarged. In the second embodiment, the filling material 1 is formed in the shape of a square bar whose lower side is chamfered. When it is chamfered, the insertion operation into the grooved space S is easy.

In the present embodiment, the end portions of the double-sided tape 2 and the release paper 3 are provided so as to go from the side surface of the filling material to the end surface.
The double-sided tape and release paper on both sides may be made in this way, but only the double-sided tape and release paper on one side may be wrapped around in this way. Typically, the double-sided tape and release paper provided on one side surface of the filling material are provided on the other side surface of the filling material while causing the double-sided tape and release paper to wrap around the end surface of one end portion of the filling material. You may make it make a double-sided tape and a release paper wrap around the end surface of the other edge part of a filling material.

When constructing the filling material in the second embodiment, the part of the release paper that has wrapped around the end surface of the filling material 1 is peeled off from the double-sided tape, and the release paper is moved upward at the end of the side of the filling material. That is, it is bent so as to be folded back in the pulling-out direction of the release paper, and in this state, the pushing operation into the groove-like space S between the joint members is performed (FIG. 4). In this embodiment, since the double-sided tape is provided on the end face of the filling material, it is possible to integrate the filling materials continuous in the longitudinal direction of the filling material, contributing to the improvement of the reliability of the attachment of the filling material. To do. In addition, since there is a portion where the end portion of the release paper 3 is folded upward, the portion can be easily grasped and the release paper can be easily pulled out, and forgetting to pull out the release paper can be prevented.

5 and 6 show an enlarged end portion of the filling material in the third embodiment. In 3rd Embodiment, although the structure of the filling material 1 and the double-sided tape 2 is the same as that of 1st Embodiment, the edge part of the tape-shaped release papers 3 and 3 exceeds the end surface of the filling material 1. , Extended so as to extend.

The tape-shaped release papers 3 and 3 are peeled off at the end position on the side surface of the filling material so that the extended portion is directed upward by the end portion extending beyond the end surface of the filling material 1. The paper can be bent so as to be folded upward (FIG. 6). In this state, if the operation of pushing into the grooved space S between the joint members is performed, the release paper is pulled out by the portion where the end of the release paper 3 is folded upward, as in the second embodiment. This makes it easier to forget to pull out the release paper.

The filling material of the above-described embodiment can be used for the joint provided between the end of the bridge girder (the end of the girder) or between the end of the girder and the abutment in the road bridge. Is expensive.

DESCRIPTION OF SYMBOLS 1 Filling material 2 Double-sided tape 3 Release paper 4 Joint member 41 Flange part 5 Waterproof rubber

Claims (2)

In a bridge joint portion of a road bridge, a method for constructing a bridging joint filling material that is fixed so as to straddle the joint member in a groove-like space between adjacent joint members,
The filling material is formed in a square bar shape from a foamed resin material having elasticity,
Double-sided tape is affixed to the side surfaces on both sides of the filler material along the longitudinal direction of the filler material over the entire length ,
While one side of the double-sided tape is affixed to the side surface of the filling material,
The other surface of the double-sided tape is covered with a tape-like release paper that does not substantially expand and contract ,
The construction method of the filling material is
A step of preparing the filling material so that the width of the filling material is larger than the width of the groove-shaped space;
The process of pushing into the groove-like space between the joint members while compressing the filling material in the width direction while leaving the release paper on both sides of the filling material,
Subsequent to the pressing step, the intercalating material is placed in a predetermined position, and the intercalating material is held by the elasticity of the foamed resin material, and the tape-like release paper is pulled out from the grooved space, and the double-sided tape is joined. Adhering to the member and fixing the interstitial material to the joint member;
A method for constructing a bridge joint filler for a bridge . At least one of the double-sided tape and the release paper covering the double-sided tape are provided so as to go around from the side surface of the filling material to the end surface at at least one end of the filling material ,
In the pushing step, the portion of the release paper provided on the end face is peeled from the double-sided tape, and the step of pushing in the filling material is performed with the peeled portion folded in the pull-out direction.
The construction method of the joint joint filling material for bridges of Claim 1.

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