JP2021004469A - Water cut-off structure - Google Patents

Abstract

To provide a water cut-off structure at a joint part of a bridge which maintains sufficient water cut-off performance for a long period of time.SOLUTION: A water cut-off structure provided at a joint part 2 of a bridge to prevent water leakage from the joint part 2 includes opposing bridge structures with the joint part 2 therebetween. At least a part of the bridge structure comprises: a vertical steel plate 31 having a steel joint member 3 on an upper surface side of a side end part and vertically suspended at a lower end part at a tip of the steel joint member 3; and a water cut-off member 5 interposed in the joint part 2. Each of the pair of opposing bridge structures often has the steel joint member 3 on the upper side of each side end and comprises the vertical steel plate 31 suspended from the lower end part at the tip of the steel joint member 3. It is preferable that a reinforcing member 31a be bridged between the steel joint member 3 and the vertical steel plate 31. Further, it is preferable that a water cut-off member support steel plate 31b be stretched on the vertical steel plate 31 toward the side of a joint part 1.SELECTED DRAWING: Figure 6

Description

The present invention relates to a water blocking structure at a joint portion of a bridge. More specifically, the present invention relates to a water blocking structure at a joint of a bridge in which sufficient water stopping is maintained for a long period of time.

Conventionally, joints are provided between a bridge pier such as a viaduct and a bridge girder, and between bridge girders at predetermined intervals. This joint is formed as a gap (play space) for absorbing elongation due to temperature changes of the bridge girder or the like. Further, it is known that a waterproof structure is provided at the joint portion (see, for example, Patent Document 1). The water-stop structure has the function of suppressing the ingress of water such as rainwater into the play space and preventing downward water leakage, as well as suppressing the noise generated on the upper surface of the bridge from being transmitted downward through the play space. It has functions such as suppressing direct collision between bridge girder ends displaced due to an earthquake or the like, mitigating the impact at the time of collision, and suppressing damage.

Japanese Unexamined Patent Publication No. 2014-55422

Examples of the waterproof structure as described above include the waterproof structure described in Patent Document 1. In this water-stop structure, an elastic sealing material is arranged between a pair of bridge girders facing each other across the joint portion, and a gutter-shaped sheet member having an open upper portion is arranged below the elastic sealing material. A water blocking material is placed in the gutter-shaped space. This water blocking material is a sponge-like elastic body having a water stopping function, and has a water guiding channel extending along a joint portion and a connecting passage penetrating from the upper surface of the water blocking material to the water guiding channel. As described above, in the water blocking structure described in Patent Document 1, a specific elastic sealing material and a sheet member are arranged, and a water blocking material having a specific configuration is arranged on the sheet member. Therefore, a sufficient water stopping effect is maintained for a predetermined period.

On the other hand, as a conventional water blocking structure in a bridge, as shown in FIG. 16, the steel joint member 3 of the bridge girder 11 having a steel plate and the end face of the bridge having the abutment 13 (or the bridge girder 12 having a concrete plate). A waterproof structure is known in which an elastic sealing material 51 is interposed between a steel plate for concrete 13a (or a steel plate for bridge girder end face 12a).

Further, as shown in FIG. 17, a water-stopping structure similar to that in FIG. 16 in which a water-stopping material 52 made of a rubber member is interposed instead of the elastic sealing material 51 is also known. However, in the water blocking structures of FIGS. 16 and 17, since the area of the end face of the steel joint member 3 is small, the elastic sealing material 51 or the water blocking material 52 made of the rubber member is peeled off from the end face of the steel joint member 3. There is a problem that it falls off and leaks water.

Further, if the steel joint member 3 is made thicker and the contact area between the elastic sealing material 51 or the water blocking material 52 made of the rubber member and the end face of the steel joint member 3 is increased, peeling and falling off can be suppressed. it can. However, since the weight of the steel joint member 3 becomes large and there are problems such as an increase in material cost and processing cost in the manufacturing process, the current situation is that products having a small contact area are distributed.

The present invention has been made in view of the above-mentioned situation, and the joint area between the steel material and the water-stopping member is formed by suspending the vertical steel plate on the steel joint member for joining the water-stopping member. It is an object of the present invention to provide a water-stopping structure in which the water-stopping member is prevented from peeling off and falling off, and sufficient water-stopping is maintained for a long period of time.

The present invention is as follows.
1. 1. It is a water-stop structure provided at the joint of the bridge to prevent water leakage from the joint.
A bridge structure facing each other with the joint portion in between is provided.
At least a part of the bridge structure has a steel joint member on the upper surface side of the side end portion.
A vertical steel plate vertically installed at the lower end of the tip of the steel joint member,
A water-stopping structure including a water-stopping member interposed in the joint portion.
2. 2. Each of the pair of the bridge constructs facing each other has the steel joint member on the upper surface side of each side end portion, and the hanging is vertically provided at the lower end portion of the tip end portion of the steel joint member. The above 1. The waterproof structure described in.
3. 3. The reinforcing member is bridged between the lower surface of the steel joint member and the surface of the hanging steel plate opposite to the joint portion. Or 2. The waterproof structure described in.
4. A water blocking material support steel plate is stretched on the vertical steel plate toward the joint portion side. To 3. The waterproof structure according to any one of the above.
5. The water blocking material supporting steel plate is stretched over the entire length in the width direction of the hanging steel plate. The waterproof structure described in.
6. The water blocking material supporting steel plate is intermittently provided in the width direction of the hanging steel plate. The waterproof structure described in.
7. The water blocking material supporting steel plate is stretched on each of the facing vertical steel plates, and the water blocking material supporting steel plate is arranged at a position facing each other in the width direction of the hanging steel plate, and one of the stops. 4. The water material supporting steel plate and the other water blocking material supporting steel plate are arranged at different positions in the vertical direction of the hanging steel plate. To 6. The waterproof structure according to any one of the above.
8. The bridge structure is a bridge girder in which steel plates for bridge girder end faces are arranged on the front end faces. To 7. The waterproof structure according to any one of the above.
9. The bridge structure is a pier on which a steel plate for the end face of the pier is arranged on the front end face. To 7. The waterproof structure according to any one of the above.
10. The water-stopping member includes an elastic sealing material arranged above the joint portion and a water-stopping material arranged below the elastic sealing material. ~ 9. The waterproof structure according to any one of the above.
11. The water blocking material is a semi-open cell type synthetic rubber foam, a closed cell type synthetic rubber foam, or a semi-open cell type synthetic resin foam. The waterproof structure described in.
12. The water blocking material has a headrace extending along the joint portion and a connecting passage penetrating the headrace from the upper surface of the water blocking material. Or 11. The waterproof structure described in.

In the waterproof structure of the present invention, at least a part of the bridge structure has a steel joint member on the upper surface side of the side end portion, and a hanging steel plate hangs down at the lower end portion of the tip end portion of the steel joint member. It is installed. Therefore, the water-stopping member interposed in the joint is supported by the tip of the steel joint member and the hanging steel plate, and the water-stopping member is prevented from peeling off or falling off, and sufficient water-stopping is maintained for a long period of time. Is maintained.
Further, each of the pair of bridge constructs facing each other has a steel joint member on the upper surface side of each side end portion, and is a vertically suspended steel plate suspended from the lower end portion of the tip end portion of the steel joint member. When the above is provided, both side surfaces of the water blocking member interposed in the joint portion are sandwiched between the tip end portion of the steel joint member and the hanging steel plate suspended from the lower end portion thereof, so that the water stoppage is stopped. Peeling and falling off of the members are more sufficiently prevented.
Further, when a reinforcing member is bridged between the lower surface of the steel joint member and the surface opposite to the joint portion of the suspended steel plate, it is pressed by the intervening water blocking member and vertically installed. It is prevented that the steel plate is deformed so as to warp on the side opposite to the joint portion.
Further, when the water blocking material support steel plate is stretched on the hanging steel plate toward the joint portion side, the water blocking member interposed in the joint portion supports the water blocking material from the lower end surface side thereof. Since it is supported by the steel plate, the water-stopping member is sufficiently prevented from peeling off, and the water-stopping member is surely prevented from falling off.
Further, when the water blocking material supporting steel plate is stretched over the entire length of the vertical steel plate in the width direction, the water blocking member interposed in the joint portion extends over the entire length in the width direction. It is supported by the water blocking material support steel plate, and the water stopping member is more reliably prevented from falling off.
Further, when the water blocking material supporting steel plate is intermittently provided in the width direction of the hanging steel plate, the water blocking material supporting steel plate can be easily provided and for water blocking interposed at the joint portion. It is possible to sufficiently prevent the members from falling off.
Further, a water blocking material supporting steel plate is stretched on each of the facing vertical steel plates, and the water blocking material supporting steel plate is arranged at a position facing each other in the width direction of the hanging steel plate, and one of the water blocking materials When the support steel plate and the other water stop material support steel plate are arranged at different positions in the vertical direction of the hanging steel plate, even if the end girder and the abutment, especially the bridge girder, extend in summer or the like, one stop Collision between the tips of the water-stopping material-supporting steel plate and the other water-stopping material-supporting steel plate can be prevented, and damage to not only the water-stopping material-supporting steel plate but also the hanging steel plate can be prevented.
When the bridge structure is a bridge girder in which a steel plate for the end face of the bridge girder is arranged on the front end face, or a bridge base in which the steel plate for the end face of the bridge is arranged on the front end face, the tip of the opposing steel joint member. It is possible to more sufficiently prevent the water-stopping member interposed between the portion and the hanging steel plate from peeling or falling off.
Further, when the water blocking member includes an elastic sealing material arranged at the upper part of the joint portion and a water blocking material arranged below the elastic sealing material, the water stopping members having different properties are provided. By arranging it in two stages, the upper part and the lower part, water leakage can be prevented more reliably.
Further, when the waterproof material is a semi-open cell type synthetic rubber foam, a closed cell type synthetic rubber foam, or a semi-open cell type synthetic resin foam, it easily follows the expansion and contraction of the bridge girder and the like, and deforms. It has excellent followability and resilience, and even if the bridge girder and the like are repeatedly expanded and contracted, peeling from the tip of the steel joint member and the hanging steel plate is prevented.
Further, when the water blocking material has a headrace extending along the joint portion and a continuous passage penetrating the headrace from the upper surface of the water blocking material, even if water leakage occurs from the elastic sealing material, the water leakage is caused. Moves from the continuous passage to the headrace, flows out from the headrace to the outside of the water stop member, and can prevent water from staying inside the water stop structure.

The present invention will be further described in the following detailed description with reference to the plurality of references mentioned with reference to non-limiting examples of typical embodiments according to the invention, but similar reference numerals are in the drawings. Similar parts are represented through several figures.
It is a schematic diagram which shows a part of a bridge seen from the side. It is a schematic perspective view of each end portion of the bridge structure facing each other with the joint portion in between. FIG. 2 is a schematic perspective view when a vertical steel plate is vertically installed under a steel joint member. It is an enlarged view of the part A of FIG. 3, and is a schematic view when the water blocking material support steel plate is not stretched on the vertical steel plate. It is an enlarged view of the part A of FIG. 3, and is a schematic view when a water blocking material support steel plate is stretched on a vertical steel plate. It is a schematic diagram when the water stop material support steel plate is L-shaped steel joined to the lower end portion of the vertical steel plate. It is a schematic perspective view when the continuous water stop material support steel plate made of L-shaped steel is stretched at the lower end part of the vertical steel plate. It is a top view of the hanging steel plate and the water blocking material support steel plate continuously stretched at the lower end portion thereof. It is a schematic perspective view which shows the form in which the waterproof material support steel plate made of L-shaped steel is intermittently stretched on the vertical steel plate. It is a top view of the form in which the water blocking material support steel plate of FIG. 9 is intermittently stretched. It is a schematic cross-sectional view which shows that the position in the vertical direction of the water-stopping material support steel plate stretched at the lower end portion of the vertical steel plate vertically hung on the lower part of the facing steel joint member is different. It is a schematic cross-sectional view which shows that the position in the vertical direction of the water stop material support steel plate stretched in the middle part of the vertical steel plate vertically hung on the lower part of the opposed steel joint member is different. 9 is a schematic perspective view showing a form in which a wire or a rope is arranged on the water blocking material support steel plate of FIG. 9. FIG. 3 is a plan view of a form in which a wire or a rope is arranged on the water blocking material support steel plate of FIG. 13 as viewed from above. It is a schematic perspective view which shows the form in which a wire or a rope is arranged on a hanging steel plate. It is a schematic perspective view which shows the conventional water-stopping structure in which an elastic sealing material is interposed in the joint part. It is a schematic perspective view which shows the conventional water-stopping structure in which the water-stopping material made of a rubber member is interposed in the joint part.

The water blocking structure of the present invention is provided at the joint portion 2 (see FIG. 1) of the bridge 100 to prevent water leakage from the joint portion 2, and is a bridge configuration facing the joint portion 2 in between. The body 1 is provided, and at least a part of the bridge structure 1 has a steel joint member 3 (see FIGS. 1, 2, etc.) on the upper surface side of the side end portion, and is a tip portion of the steel joint member 3. It includes a hanging steel plate 31 (see FIG. 3 and the like) suspended at the lower end portion, and a water blocking member 5 (see FIGS. 4, 5, and 6) interposed in the joint portion 2.

The type and structure of the bridge 100 are not particularly limited. Examples of the type of the bridge 100 include a viaduct overland, a so-called bridge over a river, the sea, and the like. The bridge 100 is a bridge structure that is supported by, for example, a substructure of a bridge such as a pier 4 and a bridge base 13 and a superstructure of a bridge such as a bridge girder composed of a main girder, a floor slab, and the like. 1 is provided (see, for example, FIG. 1). The upper structure of the bridge 100 is supported on the lower structure by a bearing member 6 (see FIG. 1).

The structure of the bridge girder is not particularly limited. The form of the main girder and the floor slab is not particularly limited, but for example, a bridge girder 11 having a steel slab as a floor slab (see FIG. 1 etc.) and a bridge girder 12 having a concrete slab as a floor slab (see FIG. 3 etc.). It can be in the form of such as. Further, the main girder and the floor slab may be integrally formed, and in this case, the main girder and the floor slab can be integrally formed as a prestressed concrete structure.

The size, number, and the like of the joint portions 2 in the bridge 100 are not particularly limited. The joint portion 2 is formed between the bridge structures 1 facing each other. Further, the bridge structure 1 may be configured by the above-mentioned superstructure facing the joint portion 2 in between, and is formed between the superstructure and the side end surface of the abutment 13 which is a substructure on the superstructure side. It may have been. The steel plate constituting the bridge structure 1 facing the bridge structure 1 with the joint portion 2 in between has excellent weather resistance on the surface on which the water blocking member 5 is interposed and the other surfaces, that is, the entire surface of the steel plate. It is also possible to improve the durability of the bridge structure 1 by applying a paint or the like.

The joints 2 are provided between bridge girders that expand and contract in the length direction due to temperature and the like, and between the bridge girders and the pier, and the gaps between the joints 2 prevent the tips of each other from colliding with each other during extension. The dimensions of the joint portion 2 in the length direction of the bridge 100 are set based on the expansion and contraction dimensions of the bridge girder and the pier, particularly the bridge girder, and the viewpoint of alleviating the impact received by the vehicle traveling on the joint portion 2.

The dimensions of the joint portion 2 in the length direction of the bridge 100 can be set by the steel joint member 3 fixed to the upper end surface of at least a part of the side end faces of the bridge structure 1 by the fixing bolts 33. (See FIGS. 1 and 2). The steel joint member 3 is made of a fixing bolt 33 or steel stud welded to fix the steel deck 11a and the steel joint member 3 to the upper end surface of the side end surface of the bridge girder 11 provided with the steel deck. It is fixed to the bridge structure 1 by the fixing bolts 33 and nuts that penetrate the steel deck 11a from the joint member 3. The steel joint member 3 includes a finger joint having a corrugated tip surface (see FIG. 2 and the like), a joint having a flat tip surface, and a combination of a finger joint having a corrugated tip surface and a joint having a flat tip surface. can do.

A water blocking member 5 is interposed in the joint portion 2. In other words, between the steel joint members 3, between the steel joint members 3 and the steel plate 13a for the end face of the abutment (see FIGS. 2, 4, 5 and 6), or the bridge girder 12 provided with the steel joint members 3 and the concrete slab. It is interposed between the steel plate 12a for the end face of the bridge girder (see FIGS. 3, 4, 5 and 6). In this case, at least one surface side of the water blocking member 5 is in contact with the tip surface of the steel joint member 3 and is interposed, but the area of the tip surface of the steel joint member 3 is not so large. , The water blocking member 5 may peel off and fall off.

Therefore, the vertical steel plate 31 is vertically installed at the lower end of the tip of the steel joint member 3. As a result, the water blocking member 5 comes into contact with the tip surface of the steel joint member 3 and one surface of the vertical steel plate 31, and peeling and falling off of the water blocking member 5 are prevented, or at least suppressed. (See FIG. 4). Further, when each of the pair of bridge structures 1 facing each other has the steel joint member 3 on the upper surface side of each side end portion, it hangs down at the lower end portion of the tip end portion of any steel joint member 3. The installation steel plate 31 is vertically installed. As a result, peeling and falling off of the water blocking member 5 can be more reliably prevented or suppressed. The thickness of the vertical steel plate 31 is not particularly limited, but it should be about 6 to 9 mm in order to prevent it from being easily deformed by being pressed by the water blocking member 5 and to prevent it from becoming excessively heavy. Can be done. Further, the vertical steel plate 31 may be vertically hung over the entire length of the steel joint member 3 in the width direction, or may be hung intermittently, but is usually the steel joint member 3. It is laid vertically over the entire length in the width direction. In this case, continuous steel plates may be vertically laid over the entire length, but when construction or the like is not always easy, a plurality of steel plates may be continuously laid.

The hanging steel plate 31 can be vertically hung at the time of manufacturing the steel joint member 3. On the other hand, when the vertical steel plate 31 is vertically installed on the steel joint member 3 of the bridge girder 11 provided with the steel deck as the floor slab of the existing bridge 100, the steel joint member 3 already arranged is fixed. The fixing bolt 33 is loosened once, the steel joint member 3 is removed, then the hanging steel plate 31 is fixed by welding or the like, and then the steel joint member 3 to which the hanging steel plate 31 is fixed is fixed again. It can be vertically installed by the step of fixing it to the bridge girder 11 provided with the steel deck slab by the bolt 33.

Further, when the water blocking member 5 comes into contact with one surface of the hanging steel plate 31, the hanging steel plate 31 is pressed by the water stopping member 5 and deformed so as to warp on the side opposite to the joint portion 2. Is possible. Therefore, in order to prevent such deformation, it is preferable that the reinforcing member 31a is bridged between the lower surface of the steel joint member 3 and the surface of the vertical steel plate 31 opposite to the joint portion 2. The reinforcing member 31a may be a steel plate having a right triangle in a plan view (see FIGS. 3 to 6 and the like), or may have a shape like a shelf support.

Further, it is more preferable that the hanging steel plate 31 is stretched with the water blocking material support steel plate 31b toward the joint portion 2. By supporting the water blocking member 5 from the lower surface side thereof in this way, peeling of the water blocking member 5 is more sufficiently suppressed, and even if the water stopping member 5 is peeled off, it is prevented from falling off and water leakage is also suppressed. The method of stretching the water blocking material supporting steel plate 31b is not particularly limited, and for example, the lower end portion of the vertical steel plate 31 can be stretched by bending it toward the joint portion 2 at a substantially right angle (see FIG. 5).

Further, the water blocking material support steel plate 31b can be stretched by joining an L-shaped metal fitting to the joint portion 2 side of the vertical steel plate 31 (see FIG. 6 and the like). Further, a steel plate punched into the shape of the tip surface of the steel joint member 3, for example, a shape along the corrugation, may be joined to the side surface or the lower end surface of the vertical steel plate 31 on the joint portion 2 side and stretched. Yes (see Figure 8).

Further, the water blocking material support steel plate 31b may be stretched over the entire length in the width direction of the vertical steel plate 31 (FIG. 7 in which continuous L-shaped metal fittings are joined and stretched, and made of steel. A steel plate punched into a shape along the waveform of the tip surface of the joint member 3 is joined and stretched (see FIG. 8). On the other hand, the water blocking material support steel plate 31b may be intermittently stretched in the width direction of the vertical steel plate 31 (see FIGS. 9 and 10 in which L-shaped metal fittings are joined and stretched). Further, the water blocking material support steel plate 31b is usually stretched near the lower end portion in the vertical direction of the vertical steel plate 31 (see FIG. 11), but a water blocking member 5 having a required thickness is interposed in the joint portion 2. If it can be mounted, it may be stretched above the lower end of the vertical steel plate 31 (see FIG. 12).

Further, each of the bridge structures 1 facing each other with the joint portion 2 in between is a steel joint member 3, and a water blocking material supporting steel plate 31b is stretched on each of the facing vertical steel plates 31. When the water blocking material supporting steel plate 31b is arranged at positions facing each other in the width direction of the hanging steel plate 31, one water blocking material supporting steel plate 31b and the other water blocking material supporting steel plate 31b are placed on the hanging steel plate 31. It is preferable that the steel sheets are stretched at different positions in the vertical direction (see FIGS. 11 and 12). As a result, when the bridge girder and the abutment, especially the bridge girder, are extended due to temperature or the like, the tips of one water blocking material supporting steel plate 31b and the other water blocking material supporting steel plate 31b collide with each other, and the suspended steel plate 31 is deformed. , And the deformation and damage of the water blocking material support steel plate 31b are prevented.

Further, when one water blocking material supporting steel plate 31b and the other water blocking material supporting steel plate 31b are stretched at different positions in the vertical direction of the vertical steel plate 31, as long as collision of the tip portions thereof is prevented. , It is preferable that the separation distance in the vertical direction is small. As a result, deformation of the water blocking member 5 at the contact portion with the water blocking material supporting steel plate 31b can be minimized.

When the bridge structure 1 is a bridge girder 12 (see FIG. 3) having a concrete slab on which a steel plate 12a for the bridge girder end face is arranged on the front end face, and when the bridge structure 1 is a bridge end face on the front end face. In the case of the abutment 13 (see FIG. 2) on which the steel plate 13a is arranged, the area of each steel plate is considerably larger than the area of the tip surface of the steel joint member 3. Therefore, it is possible to sufficiently prevent the water blocking member 5 from peeling off or falling off without vertically suspending the hanging steel plate 31.

Further, the water blocking material support steel plate 31b may be attached to the bridge girder end face steel plate 12a and the abutment end face steel plate 13a. In this case, the water blocking material support steel plate 31b can be stretched by joining an L-shaped metal fitting to the joint portion 2 side of the bridge girder end face steel plate 12a and the abutment end face steel plate 13a. Further, the water blocking material support steel plate 31b may be stretched over the entire length in the width direction of the bridge girder end face steel plate 12a and the abutment end face steel plate 13a, or may be stretched intermittently in the width direction. Good. Further, the water blocking material supporting steel plate 31b stretched on the bridge girder end face steel plate 12a and the bridge base end face steel plate 13a is formed in the width direction of the water blocking material supporting steel plate 31b stretched on the hanging steel plate 31 and the bridge structure 1. When they are arranged at opposite positions, it is preferable that one water blocking material supporting steel plate 31b and the other water blocking material supporting steel plate 31b are arranged at different positions in the vertical direction of the bridge structure 1. As a result, collision of the tip portions of the water blocking material supporting steel plates 31b with each other is prevented, and deformation of the hanging steel plate 31 and deformation and damage of the water blocking material supporting steel plate 31b are prevented.

The configuration of the water blocking member 5 interposed in the joint portion 2 is not particularly limited as long as water leakage from the joint portion 2 is prevented or at least suppressed. Examples of the water-stopping member 5 include a water-stopping member 5 including an elastic sealing material 51 arranged above the joint portion 2 and a water-stopping material 52 arranged below the elastic sealing material 51. (See FIGS. 4, 5 and 6). By using the two types of members in combination in this way, water leakage from the joint portion 2 can be efficiently prevented, and peeling and dropping of the water blocking member 5 can be suppressed.

The elastic sealing material 51 is interposed over the entire length of the joint portion 2, but depends on the shape of the steel joint member 3, the bridge girder end face, and the tip surface of the abutment end face, for example, whether it is a corrugated surface or a flat surface. The elastic sealing material 51 may be integrated over the entire length of the joint portion 2, and the elastic sealing material 51 in a form in which a plurality of divided members are integrally continuous so as to be easily intervened. You can also do it. The elastic sealing material 51 can be interposed in the joint portion 2 in a state of being appropriately compressed, and can be interposed by joining to the tip surface of the steel joint member 3 or the like, if necessary.

In the case of joining, when the elastic sealing material 51 is a material that can be joined by heating, the joining surface such as the tip surface of the steel joint member 3 can be heated, joined, and intervened. On the other hand, when the material cannot be joined by heating, it can be joined by using an adhesive or the like and interposed.

The material of the elastic sealing material 51 is not particularly limited as long as it has elasticity that can be compressed and interposed in the joint portion 2. For example, various rubbers such as polybutadiene-based, silicon-based, urethane-based, ethylene / propylene copolymer rubber, ethylene / propylene / diene copolymer rubber, and polyisoprene rubber can be used. When these rubbers are used, if necessary, the uncrosslinked product can be molded and then crosslinked by a conventional method such as heating to form the shape of the elastic sealing material 51.

Below the elastic sealing material 51, a water blocking material 52 is interposed over the entire length of the joint portion 2 so that the upper end surface is in contact with the lower end surface of the elastic sealing material 51. The water blocking material 52 also covers the entire length of the joint portion 2 due to the same waveform as the tip surface of the steel joint member 3, the shape of the vertical steel plate 31 which is a flat surface, and the shapes of the bridge girder end surface and the abutment end surface. The water blocking material 52 can be integrally formed, or the water blocking material 52 can be formed in a form in which a plurality of divided members are integrally continuous so as to be easily intervened.

Further, when the divided members of the water blocking material 52 are integrally continuously interposed, it is preferable to divide the water blocking material 52 at the same position as the elastic sealing material 51. The water blocking material 52 can be interposed in the joint portion 2 in a state of being appropriately compressed, and can also be interposed by joining to the surface of the hanging steel plate 31 or the like on the side of the joint portion 2 as needed. ..

The material of the water blocking material 52 is not particularly limited as long as it has elasticity that can be compressed and interposed in the joint portion 2. For example, it can be a foamed resin such as polyurethane foam. The material of the water blocking material 52 is the above-mentioned various rubbers, polyolefin resins, polyamide resins, synthetic resins such as polyester resins, olefin-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, polyester-based thermoplastic elastomers, and styrene-based materials. Various elastomers such as a thermoplastic elastomer and a urethane-based thermoplastic elastomer may be used.

The water blocking material 52 is usually arranged in a compressed state. As a result, when the width of the joint portion 2 of the bridge 100 changes due to a temperature change or the like, the joint portion 2 is sufficiently held and adheres to the elastic sealing material 51, so that the elastic sealing material 51 and the water blocking material 52 are formed. Water is prevented from entering during. Both the elastic sealing material 51 and the water blocking material 52 are interposed in a compressed state at a predetermined position of the joint portion 2 even at the assumed maximum width of the joint portion 2 so as not to fall off. , It is provided by setting the compression rate.

The form in which the water blocking material 52 has a water blocking function is not particularly limited, and examples thereof include foams made of synthetic rubber, synthetic resin, and the like. As the foam, a foam having a semi-open cell type, a closed cell type, or small-diameter bubbles and having low air permeability is preferable. In addition, a foam having a waterproof film on the surface, a foam impregnated with a water repellent agent added, a foam having a water repellent coated on the surface, and a hydrophobic foam produced using a hydrophobic raw material. You can also use your body.

Further, as the preferable foam, a semi-open cell type synthetic rubber foam, a closed cell type synthetic rubber foam, and a semi-open cell type synthetic resin foam are preferable, and a semi-open cell type synthetic rubber foam, A closed cell type synthetic rubber foam is more preferable.

Further, the water blocking material 52 may have a water guiding channel 52a extending along the joint portion 2 and a connecting passage 52b penetrating the water guiding channel 52a from the upper surface of the water blocking material 52. The headrace 52a can be formed, for example, by inserting a water guide member penetrating the water stop material 52 in the length direction (see FIGS. 4, 5 and 6; in these figures, the cross section of the water stop material 52 is shown. However, the headrace 52a penetrates in the length direction of the water blocking material 52).

The water blocking material 52 is often formed of a foam, particularly a semi-open cell type foam, but since it is compressed and interposed in the joint portion 2, it may penetrate into the water blocking material 52. Water may be difficult to drain. Therefore, if necessary, a headrace 52a can be provided in the water blocking material 52 to secure a drainage route. The material, shape, number, etc. of the headrace 52a are not particularly limited, and for example, a form in which glass fibers, resin fibers, etc. are bundled into a rod-like body, and a tube wall made of resin fibers, metal fibers, etc. are reticulated or spiral. It can be in the form of a tubular body having water permeability formed in the above.

The number of headraces 52a, the arrangement position, and the like are not particularly limited. Normally, one headrace 52a may be provided at a substantially central portion in the cross-sectional direction of the water blocking material 52 (see FIGS. 4, 5 and 6), but a plurality of headraces 52a may be provided depending on the inflow speed of the infiltrating water, the amount of water, and the like. For example, two headraces 52a may be provided at substantially equal intervals on the left and right sides of the substantially central portion of the cross section in the vertical direction, and may be provided at substantially equal intervals on the vertical and horizontal directions in the cross section. A book headrace 52a may be provided.

Further, the water blocking material 52 may be provided with a communication passage 52b that penetrates and communicates with the headrace 52a from the upper surface of the water blocking material 52. The form of the communication passage 52b is also not particularly limited, but for example, a form including a slit formed so as to communicate the upper surface of the water blocking material 52 and the water guide 52a in the extending direction of the water guide 52a (for example, FIG. 3, 4, 5), and a form in which a plurality of through holes communicating the upper surface of the water blocking material 52 and the headrace 52a are provided in the extending direction of the headrace 52a, or the like. .. By providing the communication passage 52b in this way, the water that has soaked into the interface between the elastic sealing material 51 and the water blocking material 52 can be easily guided to the headrace 52a, and the soaked water can be more efficiently guided. Can be drained.

Further, the water blocking member 5 composed of the elastic sealing material 51 arranged above the joint portion 2 and the water blocking material 52 arranged below the elastic sealing material 51 is a natural environment in which the bridge 100 is provided, for example. , Urban areas, mountainous areas, beach areas, etc., and whether it is a cold area or a warm area, or the sunshine time, etc., greatly affects the ease and difficulty of deterioration. Therefore, in consideration of such a natural environment, good water stopping is taken into consideration such as replacing the water stopping member 5 so that the water stopping member 5 does not peel off from the bridge structure 1 and fall. It is preferable to try to maintain the action.

Further, when the water blocking material supporting steel plate 31b is stretched toward the joint portion 2 on the hanging steel plate 31, the bridge girder end face steel plate 12a, and the abutment end face steel plate 13a, the water blocking material supporting steel plate 31b is particularly provided. In the form of the vertically provided steel plate 31 or the like intermittently provided in the width direction (see FIGS. 9 and 10 in which L-shaped metal fittings are joined and stretched), a wire or a wire or a wire or a wire or a wire or a wire or a wire or the like between adjacent water blocking material supporting steel plates 31b. The rope 32 can be arranged (see FIG. 13 which is a schematic perspective view and FIG. 14 which is a plan view of FIG. 13 as viewed from above). Further, the wire or rope 32 can also be arranged on the vertical steel plate 31 (see FIG. 15 which is a schematic perspective view). In particular, when the vertical steel plate 31 is intermittently suspended in the width direction of the steel joint member 3, it is preferable to dispose the wire or rope 32 on the vertical steel plate 31.

As a wire, a product made of steel, stainless steel, aluminum, copper, brass, piano wire, etc., and as a rope, a highly durable product made by twisting a wire made of chemical fiber, natural fiber, metal fiber, etc. And so on. When the wire or rope 32 is arranged on the water blocking material supporting steel plate 31b and the hanging steel plate 31, the wire or rope 32 engages with the engaging portion 32a provided on the water blocking material supporting steel plate 31b and the hanging steel plate 31. It can be combined and arranged. The form of the engaging portion 32a is not particularly limited, and examples thereof include a member having an insertion hole fixed to the water blocking material support steel plate 31b and the hanging steel plate 31, and a wire or rope 32 is inserted into the insertion hole and arranged. Will be set up. Further, the wire 32 can be arranged on the waterproof material supporting steel plate 31b and the vertical steel plate 31 by welding.

As described above, by disposing the wire or rope 32 on the water blocking material supporting steel plate 31b and / or the hanging steel plate 31, especially the water blocking material supporting steel plate 31b, the water blocking material supporting steel plate 31b or the hanging steel plate 31b or the hanging steel plate is provided. It is possible to prevent the 31 from being partially corroded and falling under the bridge, causing damage to vehicles, passersby, and the like. Further, it is possible to prevent the water blocking member 5 from falling downward due to aged deterioration of the water stopping member 5 interposed in the joint portion 2 and / or a pressing force from the road surface side. It is preferable that the wire or rope 32 is not arranged in a tension state such that an excessive tension acts in the length direction, but is arranged so that the tension does not act. As a result, it is possible to prevent the wire or rope 32 from being broken when the bridge girder or the like is subjected to some kind of stress and is displaced.

The present invention can be used as a water blocking structure at joints of various bridges such as viaducts.

100; Bridge, 1; Bridge structure, 11; Bridge girder with steel slab, 11a Steel slab ,; 12; Bridge girder with concrete slab, 12a; Steel plate for bridge girder end face, 13; Bridge stand, 13a; For bridge end face Steel plate, 2; joint part, 3; steel joint member, 31; hanging steel plate, 31a; reinforcing member, 31b; waterproof material support steel plate, 32; wire or rope, 32a; engaging part, 33; fixing bolt 4, 4; bridge piers, 5; water blocking members, 51; elastic sealing materials, 52; water blocking materials, 52a; headraces, 52b; communication passages, 6; support members.

Claims (12)

It is a water-stop structure provided at the joint of the bridge to prevent water leakage from the joint.
A bridge structure facing each other with the joint portion in between is provided.
At least a part of the bridge structure has a steel joint member on the upper surface side of the side end portion.
A vertical steel plate vertically installed at the lower end of the tip of the steel joint member,
A water-stopping structure including a water-stopping member interposed in the joint portion. Each of the pair of the bridge constructs facing each other has the steel joint member on the upper surface side of each side end portion, and the hanging portion is vertically provided at the lower end portion of the tip end portion of the steel joint member. The waterproof structure according to claim 1, further comprising a steel plate. The water blocking structure according to claim 1 or 2, wherein a reinforcing member is bridged between the lower surface of the steel joint member and the surface of the hanging steel plate on the side opposite to the joint portion. The water-stopping structure according to any one of claims 1 to 3, wherein a water-stopping material supporting steel plate is stretched on the hanging steel plate toward the joint portion side. The water-stopping structure according to claim 4, wherein the water-stopping material supporting steel plate is stretched over the entire length in the width direction of the hanging steel plate. The water-stopping structure according to claim 4, wherein the water-stopping material supporting steel plate is intermittently provided in the width direction of the hanging steel plate. The water blocking material supporting steel plate is stretched on each of the facing vertical steel plates, and the water blocking material supporting steel plate is arranged at a position facing each other in the width direction of the hanging steel plate, and one of the stops. The water-stopping structure according to any one of claims 4 to 6, wherein the water-stopping steel plate and the other water-stopping material-supporting steel plate are arranged at different positions in the vertical direction of the hanging steel plate. The water blocking structure according to any one of claims 1 to 7, wherein the bridge structure is a bridge girder in which a steel plate for a bridge girder end face is arranged on a front end face. The water-stop structure according to any one of claims 1 to 7, wherein the bridge structure is a bridge on which a steel plate for the end face of the bridge is arranged on the front end face. The water-stopping member according to any one of claims 1 to 9, further comprising an elastic sealing material arranged above the joint portion and a water-stopping material arranged below the elastic sealing material. The described waterproof structure. The waterproof structure according to claim 10, wherein the water blocking material is a semi-open cell type synthetic rubber foam, a closed cell type synthetic rubber foam, or a semi-open cell type synthetic resin foam. The water-stopping structure according to claim 10 or 11, wherein the water-stopping material has a water-stopping channel extending along the joint portion and a continuous passage penetrating the water-stopping material from the upper surface of the water-stopping material.

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