JP2010059627A - Expansion joint device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion joint device adaptable to heavy traffic by securing continuity at a joint having an expansion gap. <P>SOLUTION: In this expansion joint device, an extensible pavement part 31 is placed on structures 2, 2 having joint end parts 3, 3 opposed to each other. A closing body 21 is installed in the expansion gap K between the opposed joint end parts 3, 3. A permanent magnet 25 is attached to the closing body 21 to connect the closing body 21 and the joint end parts 3, 3 by a magnetic force. Since the expansion gap K is closed by the closing body 21 installed between the expansion gap K, and the closing body 21 is connected to the joint end parts 3, 3 by the magnetic force, a structure in which the portion between the opposed joint end parts 3, 3 is made continuous by the closing body 21 can be obtained. In this case, even if the expansion gap K between the joint end parts 3, 3 is extended or retracted, or the portion between the joint end parts 3, 3 is vertically displaced, the connected state thereof can be maintained since the joint end parts are connected to each other by the magnetic force. Also, since the joint end parts are connected by the magnetic force, the closing body 21 can be installed easily, and the construction period can be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to expansion joint structures such as bridges and roads used for structures such as bridges and ordinary roads.

  Various products or materials have been developed as expansion joints and expansion joints used for structures such as bridges and general roads.

  The stretch joint material is located on the road surface that is repeatedly subjected to loads and shocks by traffic vehicles, etc., so friction and damage of products and materials are severe, especially on roads with heavy traffic, which can be used for repair and replacement of parts within a short period of time. When repairs are made, traffic congestion may occur during repairs, and repairs may gradually be maintained, and vibration and noise generated from expansion joints and expansion joints will increase as vehicles pass through, especially in urban areas. It has become.

  Due to these needs, recently, joints and joints have been developed in a form that integrates the pavement and stretchable parts with a highly stretchable pavement material, and maintains the continuity of the paved road surface. It is noticed and popular.

As a conventional general expansion joint structure, the following method is implemented.
(1) Method of interposing a steel joint (2) Method of interposing a rubber joint (3) Method of continuously paving so as to cover the gap between road bridge joints (4) Method of providing joints in the pavement (1) In the method of (2), because the material different from the pavement is exposed on the road surface, a road step is generated due to the difference in friction coefficient, causing vibration and noise, and the equipment itself is progressively damaged. There is a problem to do.

  In the above methods (3) and (4), the joint material and the pavement itself cannot be expected to absorb expansion and contraction and vibration, and there is a problem that the breakage of the pavement edge proceeds in a short time.

  Furthermore, in the method using the rubber joint of (2) above, the frictional resistance is small, and there is a problem that a difference in frictional resistance from other road parts occurs. There is a drawback that the center of the rubber joint is raised.

  In the methods (1) and (4), noise and vibration are likely to be generated at discontinuous portions. In the methods (1) and (2), friction between the steel joint and the rubber joint portion is caused. There is a risk of slip due to low resistance.

  Further, in the method of continuously paving the seam portion as in the method of (3) above, since the load cannot be sufficiently supported in the gap, it cannot withstand heavy traffic, and the stretchability of the pavement material of the stretchable portion is Since it is not large, it cannot be used when the amount of expansion and contraction of the girder is large.

Therefore, in the road joint portion structure that is continuously paved so as to cover the gap allowing the expansion and contraction of the road bridge body, each road bridge body on both sides of the gap is formed with a step portion that is lower than the upper surface of the road bridge body, A pair of plates are provided in each of the two stepped portions so as to be movable in the bridge axis direction, and the two plates are formed in a concavo-convex shape with one side facing each other in the bridge axis direction. The recesses face each other with a gap, and the projections of each other protrude beyond the play and on the stepped part of the other party, and the gap is formed with a portion that obliquely crosses the gap. A joint structure (for example, Patent Document 1) in which continuous pavement is provided on both plates has been proposed.
Japanese Patent No. 3544369

  In the above seam structure, the generation of cracks in the pavement can be suppressed, but in the pair of plates, the convex portion and the concave portion are separated via a gap, and both plates are not fixed to the bridge body.

  Then, an object of this invention is to provide the expansion joint apparatus which can ensure continuity in the joint which has a gap, and can respond to heavy traffic.

  The present invention relates to an expansion joint device in which a pavement is provided on a structure provided so that joint ends face each other, and a closing body is installed between the play between the facing joint ends. The joining end portions are connected by magnetic force.

  Further, according to the present invention, permanent magnets are provided on both sides of the closing body, and members to be attracted that are attracted by the permanent magnets are respectively provided on the upper surfaces of the opposing joining end portions.

  Moreover, this invention provides the sliding part which slides on the said to-be-sucked member in the said obstruction body.

  According to the above configuration, a structure is obtained in which the gap is closed by the closing body laid across the gap, the closing body is connected to the joining end portion by magnetic force, and the connecting end portions facing each other are continuous by the closing body. In this case, since they are connected by magnetic force, the connected state can be maintained even if the gap between the joint ends expands or contracts or the joint ends are displaced in the vertical direction. Moreover, since it connects by magnetic force, installation of a closure body is easy and shortening of construction time is attained. Further, when a fixing means such as a bolt is used, the fixing means may be destroyed at the time of an earthquake. However, since the closing body is fixed by a magnetic force, the structure is strong against earthquakes.

  Further, according to the above configuration, since the permanent magnets provided on both sides of the closing body respectively attract the attracted members at the joining end portions, even if a vertical displacement occurs between the facing joining end portions, the connected state Can be held.

  Further, according to the above configuration, when the gap between the joint end portions expands and contracts, the sliding portion of the closing body slides on the sucked member and can maintain the connected state.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, an unconventional expansion joint device is obtained by adopting a new expansion joint device different from the conventional one, and the expansion joint device will be described.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 7 show a first embodiment of the present invention. An expansion joint device 1 is provided between structures 2 and 2 constituting a bridge, a road, and the like. As this structure 2, a floor made of concrete or the like is used. A version is illustrated.

  The joint ends 3 and 3 of the structures 2 and 2 forming a pair face each other, and a gap K is provided between the joint ends 3 and 3. Further, a step portion 6 is formed between the joint end portion upper surface 4 continuous to the joint end portion 3 and the upper surface 5 of the structure 2, and the joint end portion upper surface 4 is formed lower than the upper surface 5 of the structure 2. Yes.

  Attachment plates 11, 11 as attachment means are fixed to the joint end surface 4, 4 of the structures 2, 2, and a plurality of cylinders 12 are spaced on the attachment plate 11 in the longitudinal direction of the gap K. Projecting vertically. An attracted member 13 is provided at an end of the mounting plate 11, and the attracted member 13 is made of a metal plate attracted by a magnet. The sucked member 13 is fixed to the mounting plate 11 and has a bottom plate portion 13A partially protruding into the gap K, an upward engagement edge portion 13B formed at an end portion on the gap K side, and an end portion on the other side. The side plate portion 13C is integrally formed. A gap for absorbing expansion and contraction is provided between the upward engagement edges 13B and 13B of the two structures 2 and 2.

  The pair of sucked members 13 and 13 are connected by a closing body 21 that is a load-supporting sliding body having a substantially flat plate shape, and the closing body 21 is made of a resin material such as dicyclopentadiene (DCP). As described above, by using a resin product having excellent shock absorption and a predetermined strength for the closed body 21, excellent durability is achieved. And since the obstruction | occlusion body 21 consists of an elastic board, it is excellent in shock absorption, and since it is resin, rust does not generate | occur | produce.

  Leg portions 22 and 22 are provided at both lower portions of the closure body 21, and a recess 23 is formed between the leg portions 22 and 22. The recess 23 is higher than the lower surface of the leg portion 22. The inner ends 22T and 22T of 22 are engaged with the upward engaging edges 13B and 13B. A gap is formed between the upward engaging edge 13B and the recess 23. The leg portion 22 is provided with a slide pad 24 as a sliding portion. The slide pad 24 is made of a rubber mat obtained by solidifying a waste tire chip with an asphalt binder, a thermoplastic elastomer, or the like, and the sucked member 13 slides on the bottom plate portion 13A. The slide pad 24 has less frictional resistance than the closing body 21.

  Permanent magnets 25 are provided on both sides of the closing body 21, and neodymium magnets are used for the permanent magnets 25. A cylindrical mounting recess 25A is formed on the upper surface of the closing body 21, and a plurality of the mounting recesses 25A are provided at intervals in the longitudinal direction of the gap K corresponding to the leg portion 22. A cylindrical permanent magnet 25 is fixed in the recess 25A. The permanent magnet 25 is not exposed on the lower surface of the leg portion 22 and attracts the bottom plate portion 13A by a magnetic force through the leg portion 22 below the recess 25A. Further, as shown in FIGS. 5 and 6, the slide pad 24 is provided between the permanent magnets 25, 25. Moreover, the height of the upper surface of the said obstruction | occlusion body 21 and the upper edge of the said side-plate part 13C is substantially equal in use condition. Further, in the initial state (before expansion and contraction), the cover plate 26 is placed on the side plate portions 13C and 13C on both sides, and the cover plate 26 is not fixed, so that the gap K can be expanded and contracted.

  In addition, semicircular curved portions 27 and 27 are formed at both ends of the closing body 21, respectively, and a height difference is generated between the joint end portion upper surfaces 4 and 4, and as shown by a chain line in FIG. Even if the angle becomes slanted, the closed body 21 does not interfere with the sucked member 13 because there are no corners at both ends. In addition, a gap is formed between both ends of the closing body 21 and the side plate portion 13 </ b> C, and the gap is filled with a filler 28 having flexibility.

  A pavement 31 is provided on the upper surface of the structure 2 except for the joint end upper surface 4, and an elastic pavement 32 is provided on the joint end upper surfaces 4, 4 and the closing body 21.

  Next, the effect | action is demonstrated about the said structure. In on-site construction, the attachment plate 11 to which the sucked member 13 is fixed is fixed to the joint end portion upper surface 4, or the attachment plate 11 is fixed to the joint end portion upper surface 4 and then welded to the attachment plate 11 as appropriate. After fixing the member 13 to be sucked and arranging the members 13 and 13 to be sucked on both sides of the gap K, the closing member 21 is placed between the members 13 and 13 to be sucked on both sides. Since the closing plate 21 is provided with a plurality of permanent magnets 25 having a high magnetic force, the gap K is closed only by placing both sides of the closing body 21 on the bottom plate portions 13A and 13A of the attracted members 13 and 13. be able to. After attaching the closing body 21 in this way, the lid plate 26 is covered so as to close the space between the side plate portions 13C and 13C on both sides, and then the stretchable pavement portion 32 is formed.

  In the expansion joint device 1 configured as described above, the closing body 21 is disposed across the gap K, and both sides of the closing body 21 are connected to the attracted members 13 and 13 by the permanent magnet 25. Can be ensured, and even when a heavy load is applied due to heavy traffic, a strength that can withstand this can be obtained. In particular, the use of DCP for the closing body 21 can ensure durability, reduce the weight, and improve the workability.

  When the gap K expands and contracts, the slide pad 24 slides on the bottom plate portion 13A in a state where the closing body 21 and the member to be attracted 13 are connected by the permanent magnet 25. Even when the gap K is widened and only the slide pad 24 on one side of the closing body 21 is slid, the inner end 22T of the closing body 21 is locked to the upward engagement edge 13B, and the connection is not released. After locking, the slide pad 24 on the other side slides. Note that the elastic pavement 32 also expands and contracts corresponding to the expansion and contraction of the gap K.

  Further, even when the height difference is generated between the structures 2 and 2 on both sides and the closing body 21 is inclined as shown by the chain line in FIG. . In particular, by using a neodymium magnet as the permanent magnet 25, a high attractive force due to magnetic force can be obtained.

  Thus, in the present embodiment, corresponding to the claims, in the expansion joint device in which the pavement portion 31 is provided on the structures 2 and 2 provided so that the joint end portions 3 and 3 are opposed to each other. Since the closing body 21 is installed in the gap K between the joint ends 3 and 3 and the closing body 21 and the joining ends 3 and 3 are connected by magnetic force, the clearance K is formed by the closure body 21 extending across the gap K. The closed body 21 is connected to the joining end portions 3 and 3 by closing and magnetic force, and the opposing joining end portions 3 and 3 are continuously connected by the closing body 21. In this case, since the connection is made by magnetic force, the connection state is maintained even if the clearance K between the joint ends 3 and 3 expands or contracts or the height between the joint ends 3 and 3 is displaced in the vertical direction. it can. Moreover, since it connects by magnetic force, installation of the obstruction | occlusion body 21 is easy and it becomes possible to shorten construction time. Furthermore, when fixing means such as bolts are used, the fixing means may be destroyed during an earthquake. However, since the closure body 21 is fixed by a magnetic force, the structure is strong against earthquakes.

  As described above, in this embodiment, corresponding to the claims, the permanent magnets 25 are provided on both sides of the closing body 21, and the joined end portions 3, 3 facing the attracted members 13, 13 attracted by the permanent magnet 25. Since the permanent magnets 25 provided on the upper surfaces 4 and 4 and on both sides of the closing body 21 respectively attract the attracted member 13 of the joining end 3, the permanent magnets 25 are arranged in the vertical direction between the facing joining ends 3 and 3. Even if displacement occurs, the connected state can be maintained.

  Further, in this embodiment, since the slide pad 24 as the sliding portion that slides on the sucked member 13 is provided in the closing body 21 in accordance with the claims, the clearance K between the joint end portions 3 and 3 is provided. When it is extended and contracted, the slide pad 24 of the closing body 21 can slide on the sucked members 13 and 13 to keep the connected state.

  Further, in this embodiment, since the curved portions 27 are provided on both end sides of the closing body 21, the vertical displacement occurs between the joining end portions 3 and 3, and the closing body 21 is obstructed even when the closing body 21 is inclined. Both sides of the body do not interfere with the sucked member.

  Furthermore, as an effect on the embodiment, since the cylindrical body 12 protruding from the joint end portion upper surface 4 is provided and the cylindrical body 12 is embedded in the stretchable pavement portion 31, the stretchable pavement portion 31 and the joint end portion are provided. The upper surface 4 can be integrated.

  FIG. 8 shows a second embodiment of the present invention, where the same reference numerals are given to the same parts as those of the first embodiment, and detailed description thereof is omitted. In this example, instead of the mounting plate 11, The attachment band plate 41 and the reinforcing bars 42 are used as attachment means, and a plurality of attachment band plates 41 are arranged in the longitudinal direction of the gap K on the joint end upper surface 4, and the plurality of reinforcing bars 42 of these attachment band plates 41 are arranged. The suction member 13 is integrally provided on the attachment band plate 41 by welding or the like. Further, the cylindrical body 12 is fixed to the attachment band plate 41. Alternatively, the suction member 13 may be fixed to the attachment band plate 41 in advance, and the suction member 13 may be attached to the upper surface 4 of the joining end portion together with the attachment band plate 41.

  Therefore, support plates 43 and 43 are disposed on the opposing surfaces of the joint end portions 3 and 3, respectively, and a sealing material 44 such as a rubber plate is disposed between the support plates 43 and 43, and the joint end portion upper surface 4 is provided with concrete. The mounting plate 41 and the reinforcing bar 42 are attached to the structure 2 by filling a fixing filler (not shown) such as the support plate 43 instead of a mold and hardening the fixing filler. The sucked member 13 that is fixed and fixed to the attachment band plate 41 is fixed to the joint end surface 4.

  Thus, also in the present embodiment, the same operation and effect as in the first embodiment are achieved, and the sucked member 13 is simply joined to the joining end portion by the mounting means including the mounting band plate 41 and the reinforcing bars 42 and the fixing filler. It can be attached to the upper surface 4.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible.

It is sectional drawing of the principal part of Example 1 of this invention. FIG. It is sectional drawing of the principal part of the obstruction body which made the sliding part the cross section same as the above. It is sectional drawing of the principal part of a closure body same as the above. It is a top view of the principal part of a closure body same as the above. It is a perspective view under construction same as the above. It is a perspective view of an expansion joint apparatus same as the above. It is a perspective view during construction of Example 2 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Expansion joint apparatus 2 Structure 3 Joint end part (joint end surface)
4 Joint end top surface 11 Mounting plate (mounting means)
13 To-be-sucked member 21 Occlusion body (load support type sliding body)
24 Slide pad (sliding part)
25 Permanent magnet 27 Curved portion 32 Elastic pavement (pavement)

Claims (3)

In an expansion joint device in which a pavement is provided on a structure provided so that the joint ends face each other, a closing body is installed between the opposing joint ends, and the closure body and the joint ends. The expansion joint apparatus characterized by connecting these by magnetic force. The expansion joint device according to claim 1, wherein permanent magnets are provided on both sides of the closing body, and members to be attracted by the permanent magnets are respectively provided on the upper surfaces of the opposing joint ends. The expansion joint device according to claim 2, wherein a sliding portion that slides on the sucked member is provided in the closing body.

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