JP6227280B2 - Telescopic device for road - Google Patents

Description

  The present invention relates to a road expansion and contraction device used for road bridges, road viaducts, and the like.

  In road bridges and road viaducts, expansion and contraction due to temperature changes and vibration expansion and contraction due to earthquakes and the like occur. In order to absorb such expansion and contraction, a gap is provided between the bridge and the bridge or the abutment, and an extension device is disposed so as to cover the gap (see Patent Document 1).

  In patent document 1, the some expansion-contraction apparatus is arrange | positioned along with the width direction of a road bridge. Moreover, in order to prevent water leakage from the gap, a water stop material is disposed below the expansion device. The telescopic device is formed with a predetermined length, mainly with a standard length. On the other hand, the water-stopping material is composed of a single seamless sheet. In order to improve strength and durability, the waterstop material often contains reinforcing fibers.

JP 2010-18949 A

By the way, road surfaces such as road bridges are not necessarily flat because of not only the recesses and protrusions (folding points) that were intentionally formed at the time of design, but also the undulations and aging that occurred during construction, Moreover, since the shape is not constant, the position and size of the unevenness cannot be specified.
Therefore, when installing the telescopic device, the product manufactured on the flat surface is installed in a state that matches the current road surface.

  However, the waterstop material disposed below the expansion / contraction device is composed of a single sheet without any joints and includes reinforcing fibers, so that the elasticity is relatively low. Therefore, it cannot follow the unevenness | corrugation of a road surface, and a wrinkle etc. arise in a water stop material. Thereby, durability of a water stop material falls.

  Then, the objective of this invention is providing the expansion-contraction apparatus for roads which has the water stop material in which durability improved rather than before.

The road expansion and contraction device of the present invention includes a plurality of upper expansion joints arranged in the width direction of the road, and a lower waterstop material disposed below the plurality of upper expansion joints,
The lower water blocking material is arranged in the width direction of the road, and a plurality of first lower seal members including reinforcing fibers and two adjacent first lower seal members in the width direction of the road are opposed to each other. And a second lower seal member that covers the entire region including the two end portions on at least one surface,
The stretchability of the second lower seal member is higher than the stretchability of the first lower seal member,
A connection position of the two upper expansion joints adjacent to each other in the width direction of the road and a connection position of the two first lower seal members adjacent to each other in the width direction of the road are arranged so as to overlap in the vertical direction.

  According to the present invention, since the reinforcing fibers included in the first lower seal member are not continuous at the bending position (concave portion or convex portion) of a road bridge or the like, the second lower seal member connecting the first lower seal member is Bend flexibly. Thereby, since the bending stress which acts on a 1st lower seal member can be reduced, the fatigue of a 1st lower seal member can be reduced. Therefore, the durability of the lower water stop material can be improved. Here, the “bending position of a road bridge or the like” is a pseudo gradient change point at an expansion / contraction device connecting portion that matches the road surface.

  In the present invention, it is preferable that the two first lower seal members adjacent in the width direction of the road are separated from each other.

  In the above configuration, the first lower seal member including the reinforcing fiber does not exist at the bending position of the road bridge or the like. Therefore, the bending stress acting on the first lower seal member can be reduced as compared with the case where the first lower seal member is not separated. Thereby, durability of a lower water stop material can be improved.

  Furthermore, it is preferable that the second lower seal member covers an area including two opposite ends of the two first lower seal members adjacent to each other in the width direction of the road on both surfaces over the entire width.

  In the above configuration, since the first lower seal member has a three-layer structure of the first lower seal member and the second lower seal member at the connection position of the first lower seal member (bending position of the road bridge or the like), Thickness increases. Thereby, durability of a lower water stop material can be improved more.

  According to the present invention, since the reinforcing fibers of the first lower seal member are not continuous at the bending position (concave portion or convex portion) of the road bridge or the like, the second lower seal member connecting the first lower seal member is flexible. Turn to. Thereby, since the fatigue of a lower water stop material can be reduced, durability of a lower water stop material can be improved.

(A) is sectional drawing (cross-sectional view along the traveling direction of a vehicle) of the expansion-contraction apparatus which concerns on embodiment of this invention, (b) is another sectional drawing (cross-section along the width direction of a road) of expansion-contraction apparatus. Figure). (A) is a perspective view which shows the connection position periphery of collar parts, (b) is sectional drawing along the BB line of Fig.2 (a). It is the perspective view which showed the connection method of the collar part in order. It is the perspective view which showed the connection method of the collar part of the modification 1 in order. It is the perspective view which showed the connection method of the collar part of the modification 2 in order. It is sectional drawing which shows the connection structure of the collar part of another modification.

  Hereinafter, embodiments of the present invention will be described.

  Here, the telescopic device 100 according to the embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1A, the expansion / contraction device 100 includes an upper expansion joint 1 exposed on the road surface and a lower water blocking material 2 disposed below the expansion expansion joint 1 and is adjacent to the vehicle traveling direction 2. Two bridges 10 and 20 are arranged. Each of the bridges 10 and 20 has floor plates 11 and 21 and post-cast concrete 12 and 22 applied thereon.

  The upper expansion joint 1 includes a joint support member 31 disposed across the bridges 10 and 20, two upper reinforcing plates 32 and 33 embedded in the joint supporting member 31, a lower reinforcing plate 34, and a side reinforcing plate 35. , 36. The upper reinforcing plate 32 is disposed above the bridge 10, and the upper reinforcing plate 33 is disposed above the bridge 20. The lower reinforcing plate 34 is provided across the bridge 10 and the bridge 20. The side reinforcing plates 35 and 36 are formed in an L shape and are arranged on both sides of the upper reinforcing plates 32 and 33 and the lower reinforcing plate 34.

  The joint support material 31 is a rubber plate member. As shown in FIG. 1A, the joint support member 31 is formed with four grooves 31a, 31b, 31c, and 31d that are open toward the road surface along the running direction. The joint support member 31 is also formed with grooves 31e and 31f that are recessed toward the road surface. These grooves can absorb expansion and contraction of the upper expansion joint 1 in the traveling direction.

  L-shaped bolts 5 are embedded in the concrete 12 and 22. The upper expansion joint 1 is fixed to the upper end portion of the bolt 5 with a nut 6.

  As shown in FIG.1 (b), the some upper expansion joint 1 is arrange | positioned along with the width direction of the road. The connection position of the upper expansion joint 1 and the upper expansion joint 1 is arranged at the apex of the convex part (mountain part) of the road, the bottom of the concave part (valley part), or the flat part (including between adjacent irregularities). Yes. In FIG.1 (b), a connection position is arrange | positioned at the vertex part of a convex part, and the two upper expansion joints 1 and 1 are mountain-shaped along the convex part of a road.

  As shown in FIG. 1A, the lower water blocking material 2 includes a flange portion (first lower seal member) 41 disposed between the bridge 10 and the bridge 20, and a holding portion 42 that holds the flange portion 41. , 43. The holding parts 42 and 43 have bars extending in the horizontal direction and are supported by the reinforcing bars 7. The holding parts 42 and 43 also function as reinforcing plates that reinforce the mutually facing ends of the bridges 10 and 20. Buffer plates 44 and 45 are disposed above the holding portions 42 and 43. The buffer plates 44 and 45 are disposed so as to be in contact with the bottom surface of the upper expansion joint 1 and alleviate the impact received from the upper expansion joint 1.

  The collar portion 41 is formed in a substantially U shape in the cross section in the vertical direction. The collar portion 41 is fixed to the holding portions 42 and 43 by bolts and nuts.

  As shown in FIG.1 (b), the some collar part 41 (41A, 41B) is arrange | positioned along with the width direction of the road. Two flange portions 41A and 41B adjacent in the width direction are connected by a seal member (second lower seal member) 61. The lower water blocking material 2 is formed in a mountain shape along the road surface as a whole by the seal member 61 being curved along the convex portion of the road surface.

  As shown in FIG. 2A, the seal member 61 is formed in a sheet shape, and includes all inner surfaces and outer surfaces in the periphery of the opposite ends of the flange portions 41A and 41B (regions including the end portions). The peripheral surface is covered over the entire width.

  As shown in FIG. 1B and FIG. 2A, the two flange portions 41A and 41B are separated from each other in the width direction of the road, and a seal member 61 exists between them. The connection position of the upper expansion joints 1 and 1 is disposed above the seal member 61 existing between the flange portions 41A and 41B (see FIG. 1B). Thus, the connection position of the upper expansion joints 1, 1 and the connection position of the flanges 41 </ b> A, 41 </ b> B of the lower water blocking material 2 overlap in the vertical direction.

  The collar part 41 (41A, 41B) has the same length as that of the telescopic device 100, and in FIG. 1B, these connection positions are arranged at the apex part of the convex part. In FIG. 2 and subsequent figures, a case where the connecting positions of the flange portions 41A and 41B are linear (state before being placed along the concave portion or the convex portion) is shown.

  As shown in FIG. 2B, the flange portions 41 </ b> A and 41 </ b> B have reinforcing fibers 71 and an elastic material 72 that covers the periphery thereof. By including the reinforcing fiber 71, the strength and durability are improved, but the stretchability is slightly inferior to the case of only the elastic material 72 (material having elasticity).

  On the other hand, the seal member 61 is made of an elastic material such as rubber or urethane resin, and does not include reinforcing fibers. Therefore, it is excellent in stretchability than the collar part 41 (41A, 41B). In addition, the seal member 61 is easily bent flexibly along the concave and convex portions of the road even when bent in a U shape.

  Next, a method for connecting the collar portions 41A and 41B will be described with reference to FIG.

  First, as shown in FIG. 3A, the flange portions 41A and 41B are brought close to each other, and the adhesive 80 is applied to the inner side surface and the outer side surface around the opposite ends. And the edge part (area | region including the part which apply | coated the adhesive agent 80) of the collar parts 41A and 41B is covered with the sealing member 61. FIG. The seal member 61 is attached to the flange portions 41 </ b> A and 41 with an adhesive 80. Here, unvulcanized rubber (unvulcanized rubber) is used for the seal member 61.

  Next, the sealing member 61 is heated and pressurized in a mold (vulcanization molding). The seal member 61 becomes vulcanized rubber, and the elasticity and stretchability are improved (see FIG. 3B).

  As described above, according to the telescopic device 100 of the present embodiment, the following effects can be obtained. Since the reinforcement part 71 is contained in the collar part 41 (41A, 41B), the stretchability of the collar part 41 is slightly inferior to the case where the reinforcement fiber 71 is not included. However, since the reinforcing fiber 71 is not continuous at the road bending position (a quasi-gradient change point at the expansion / contraction device connection portion adapted to the road surface), the seal member 61 that connects the flange portion 41 bends flexibly. Thereby, since the bending stress concerning the lower water blocking material 2 can be reduced, the fatigue of the lower water blocking material 2 can be reduced. Therefore, the durability of the lower water blocking material 2 can be improved.

  Further, since the flange 41A and the flange 41B adjacent to each other in the width direction of the road are separated from each other, only the seal member 61 exists at the road bending position, and the flange 41 (41A including the reinforcing fiber 71) is present. , 41B) does not exist. Thereby, in the bending position of a road, the sealing member 61 bends flexibly compared with the case where the collar part 41A and the collar part 41B are not separated. Moreover, since the bending stress which acts on the collar part 41 can be reduced more, durability of the lower water blocking material 2 can be improved more.

  Further, at the connection position between the flange 41A and the flange 41B, the inner and outer peripheral surfaces of the flanges 41A and 41B are covered with the seal member 61 to form a three-layer structure. Therefore, the thickness of the lower water blocking material 2 increases in the connection position of the collar parts 41A and 41B. Thereby, durability of the lower water blocking material 2 can be improved more.

  Next, a modification of the first embodiment will be described with reference to FIGS. In addition, about the structure same as 1st Embodiment mentioned above, the same code | symbol is used and the description is abbreviate | omitted suitably.

[Modification 1]
The modification 1 is different from the first embodiment in the connection method of the flange portions 241 (241A, 241B) as shown in FIG. The collar part 241 (241A, 241B) has a reinforcing fiber 71 and an elastic material 72 covering the periphery thereof, like the collar part 41 (41A, 41B) of the first embodiment (FIG. 2B). )reference).

  First, as shown in FIG. 4A, the plate-shaped flange portions 241A and 241B are brought close to each other, and the adhesive 80 is applied to the upper surface and the bottom surface around the opposite end portions. Then, the rectangular parallelepiped seal member 261 is disposed across the two flange portions 241A and 241B (portions where the adhesive 80 is applied) (see FIG. 4B). Thereby, the sealing member 261 is affixed on the upper surface and the bottom surface of the flange portions 241A and 241B, respectively. The seal member 261 is made of the same material as the seal member 61 of the first embodiment, and here, unvulcanized rubber (unvulcanized rubber) is used.

  Next, the seal member 261 is heated and pressurized in a mold (vulcanization molding). The seal member 261 becomes vulcanized rubber, and the elasticity and stretchability are improved (see FIG. 4C). In addition, the flange portions 241A and 241B are covered with the seal member 261 over the entire width in the region including the end portions facing each other. Furthermore, since a part of the seal member 261 has moved between the flange 241A and the flange 241B during the vulcanization molding, the seal member 261 exists between the flanges 241A and 241B.

  Thereafter, the flange portions 241A and 241B and the seal member 261 are bent into a U shape.

  As described above, also in the modification 1, as in the above embodiment, the reinforcing fibers 71 included in the flange portion 241 are not continuous at the connection position of the flange portion 241 (241A, 241B). The seal member 261 bends flexibly. Thereby, since the bending stress which acts on the collar part 241 can be reduced, durability of a water stop material can be improved.

[Modification 2]
The modification 2 is different from the first embodiment in the connection method of the flange portions 341 (341A, 341B) as shown in FIG. The collar part 341 (341A, 341B) has the reinforcing fiber 71 and the elastic material 72 covering the periphery thereof, like the collar part 341 (341A, 341B) of the first embodiment (FIG. 2B). )reference).

  First, as shown in FIG. 5A, the plate-shaped flange portions 341A and 341B are brought close to each other, and the adhesive 80 is applied to the upper surface and the bottom surface around the opposite ends. Then, a fluid seal member 361 is filled in a mold (not shown) around the opposite ends of the flanges 341A and 341B (around the portion where the adhesive 80 is applied) (see FIG. 5B). Moreover, when a clearance gap exists between the collar part 341A and the collar part 341B, you may fill with the sealing member 361 between these. For the seal member 361, urethane resin or the like can be used.

  Next, the seal member 361 is cured by heating (see FIG. 5C). The cured seal member 361 is bonded to the flange portions 341A and 341B by the adhesive 80. In addition, the flange portions 341A and 341B are covered with the seal member 361 over the entire width in the region including the end portions facing each other. The collar part 341A and the collar part 341B are separated from each other, and a seal member 361 exists between them.

  Thereafter, the flange portions 341A and 341B and the seal member 361 are bent into a U shape.

  As described above, according to the modified example 2, similarly to the above embodiment, the reinforcing fiber 71 included in the flange portion 341 is not continuous at the connection position of the flange portion 341 (341A, 341B), and the sealing member that connects them. 361 bends flexibly. Thereby, since the bending stress which acts on the collar part 341 can be reduced, durability of a water stop material can be improved.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

  For example, in the present embodiment, the inner peripheral surface and the outer peripheral surface of the two flange portions 41 </ b> A and 41 </ b> B are covered with the seal member 61, but only one of the surfaces may be covered with the seal member 61. For example, as shown in FIG. 6A, only the inner peripheral surfaces of the flange portions 41A and 41B may be covered with the seal member 461. In Modification 1, the upper and bottom surfaces of the two flange portions 241A and 241B are covered with the seal member 61. In Modification 2, the upper and bottom surfaces of the two flange portions 341A and 341B are covered with the seal member 361. However, only the upper surface or the bottom surface of the collar portion may be covered with the sealing material.

  In the present embodiment, the two flange portions 41A and 41B are separated from each other, and the seal member 61 is present between the flange portion 41A and the flange portion 41B. However, the flange portions 41A and 41B may not be separated from each other. . For example, as shown in FIG. 6 (b), the flange portion 41A and the flange portion 41B are in contact with each other, and the seal member 61 may not exist between them. In the first and second modified examples, the two flanges 241A and 241B (341A and 341B) are separated from each other, and the seal member 261 (361) exists between them. There may be no sealing member.

  Furthermore, in this embodiment, the seal member 61 exists between the two flange portions 41A and 41B, but the seal member may not exist between the flange portions 41A and 41B that are separated from each other. Further, in the first and second modified examples, the seal member 261 (361) exists between the two flange portions 241A and 241B (341A and 341B), but the seal member does not exist between the two separated flange portions. May be.

  Moreover, the method of connecting a collar part and a collar part is not restricted to the method demonstrated by this embodiment and the modification, It can change. For example, in this embodiment and Modification 1, unvulcanized rubber is used as the seal member 61, and this is heated and pressurized. However, the seal member 61 is not limited to unvulcanized rubber, and vulcanized rubber is used. Also good. In this case, heating and pressurization may or may not be performed. In the second modification, the seal member 361 is heated, but the seal member 361 may not be heated.

  Further, the upper expansion joint 1 is not limited to the configuration shown in FIG. 1 and can be changed.

DESCRIPTION OF SYMBOLS 1 Upper expansion joint 2 Lower water stop material 10,20 Bridge 31 Joint support material 41,41A, 41B, 241,241A, 241B, 341,341A, 341B A collar part (1st lower seal member)
61 Seal member (second lower seal member)
71 Reinforcing fiber 72 Elastic material 100 Telescopic device

Claims (3)

A plurality of upper expansion joints arranged in the width direction of the road, and a lower water stop material disposed below the plurality of upper expansion joints,
The lower water stop material is
A plurality of first lower seal members that are arranged in the width direction of the road and that include reinforcing fibers,
A second lower seal member that covers a region including two opposite ends of the two first lower seal members adjacent to each other in the width direction of the road on at least one surface over the entire width;
The stretchability of the second lower seal member is higher than the stretchability of the first lower seal member,
The connection positions of the two upper expansion joints adjacent to each other in the width direction of the road and the connection positions of the two first lower seal members adjacent to each other in the width direction of the road are arranged so as to overlap in the vertical direction. Telescopic device for road.   The expansion / contraction apparatus according to claim 1, wherein the two first lower seal members adjacent in the width direction of the road are separated from each other.   The said 2nd lower seal member coat | covers the area | region containing the two edge parts which mutually adjoin each other of the said 1st lower seal member adjacent to the width direction of a road on both surfaces over a full width. The telescopic device according to 1 or 2.

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