JP5277086B2 - Joint assembly and expansion joint for bridge - Google Patents

Description

  The present invention relates to a joint assembly and an expansion joint for a bridge which is installed at a joint of a bridge structure such as an overpass or an elevated road and absorbs deformation of the bridge structure due to temperature change, load of transportation, impact or vibration. .

  Expansion joints (flexible joints) constructed between a pair of bridge floor slabs provided between play formed at a joint of a road bridge are known. As shown in FIG. 8, a known expansion joint (30) is formed of a pair of joint assemblies (40) arranged at a fixed distance from each other and an elastic material such as synthetic rubber, for example. A water stop member (36) disposed in a gap between the assemblies (40). As shown in FIG. 9, each joint assembly (40) includes a plurality of metal corrugated plates (37) and a plurality of joints (40) fixed to the inflection portions (31, 32) of the corrugated plates (37) at regular distance intervals. An anchor bar (34) and a flat mold plate (35) fixed to the bottom of the corrugated plate (37) at right angles to the corrugated plate (37) by spot welding are provided. The corrugated plate (37) includes a plurality of inner inflection portions (31), a plurality of outer inflection portions (32) curved in the opposite direction to the inner inflection portion (31), and an adjacent inner inflection portion ( 31) and a connecting portion (33) connecting the outer inflection portion (32) and having a continuous wave shape by the inner inflection portion (31), the connecting portion (33) and the outer inflection portion (32). It is formed. Each anchor bar (34) is fixed to and extends from each inner inflection (31) and each outer inflection (32) of the corrugated plate (37).

  The expansion joint (30) shown in FIG. 8 is, for example, a corrugated sheet having a portion perpendicular to the traveling direction of the vehicle, less than the expansion joint formed by a metal plate having a concavo-convex cross section disclosed in Patent Document 1 below. There is an advantage that it is possible to reduce the impact noise between the vehicle tire and the expansion joint that occurs when passing.

  A plurality of reinforcing bars are embedded in the bottom wall (53) forming a step (52) at the end of the concrete floor slab (51) provided on the road bridge, and the expansion joint (30) is placed on the bottom wall (53). The anchor bar (34) was placed, and the anchor bar (34) was welded at the crossing portion to the rising reinforcing bar (55) of the embedded reinforcing bar and the through-bar (56) crossing the anchor bar (34), and the step ( The corrugated space surrounded by the corrugated plate (37) of the side wall (54), bottom wall (53) and expansion joint (30) forming 52) is filled with concrete, and the reinforcing bar and anchor bar (34) are placed inside the concrete. When it is buried in, only the top of the corrugated plate (37) and the upper surface of the water stop member (36) are exposed on the road surface.

  During use of the expansion joint (30), the corrugated sheet (37) may be deformed or cracked in the concrete due to the load, impact and vibration of the vehicle passing through the road surface. Therefore, it is necessary to give the corrugated sheet (37) with a sufficient thickness and a sufficient height, and at the same time, fill the corrugated space with a sufficient amount of concrete to prevent the expansion joint (30) from being damaged. However, when the thickness or height of the corrugated plate (37) is increased, not only the weight of the corrugated plate (37) is increased, but also the processing and transporting of the corrugated plate (37) becomes difficult. Generally, when rolling a rolled structural steel plate to a corrugated sheet (37), the thickness of the corrugated sheet (37) is limited to 15 mm, and if it exceeds 15 mm, the corrugated sheet (37) is processed into a desired shape. Can not do it. Further, when the amount of concrete to be filled increases, the construction period becomes longer and the construction cost increases. In addition, when removing the expansion joint (30) together with the reinforcement when replacing the aged or damaged expansion joint (30), a large amount of labor and time is conventionally required to remove the concrete and joint assembly (40). Met. For this reason, there was a request to reduce the amount of concrete, but it could not be realized.

JP 2004-332358 A

  Therefore, if the vertical height of the corrugated sheet (37) is lowered, the amount of concrete placed in the expansion joint (30) can be reduced, and if the thickness of the corrugated sheet (37) is decreased, the corrugated sheet (37) It is clear that the work efficiency of the removal of the concrete and the joint assembly (40) can be improved. However, simply reducing the height and thickness of the corrugated plate (37) reduces the amount of concrete to be cast, which reduces the overall strength of the expansion joint (30) against bending moments, loads and impacts. occured.

  Therefore, an object of the present invention is to provide a joint assembly for a bridge and an expansion joint that can provide sufficient mechanical strength even with a corrugated sheet having a reduced height. Another object of the present invention is to provide a bridge joint assembly and an expansion joint that can reduce the amount of concrete to be filled in the expansion joint, thereby reducing the cost, labor, and time for replacement of the expansion joint. .

  The bridge joint assembly (20) of the present invention includes a plurality of inner inflection portions (11), a plurality of outer inflection portions (12) curved in a direction opposite to the inner inflection portion (11), and adjacent inner portions. A connecting portion (13) connecting the inflection portion (11) and the outer inflection portion (12), and the inner inflection portion (11), the connection portion (13) and the outer inflection portion (12). Connected to a continuous corrugated metal corrugated plate (1) and a pair of connecting parts (13) facing each outer inflection part (12) and connected to the outer inflection part (12) The metal reinforcing plate (2), a plurality of metal first anchor bars (3) connected at right angles to each reinforcing plate (2), and the first anchor bar (3) in parallel A metal second anchor bar (4) connected to the inner inflection part (11). When the reinforcing plate (2) is connected between the pair of connecting portions (13) so as to face the outer inflection portion (12), the outer inflection portion (12), the pair of connecting portions (13), and the reinforcing plate (2) A truss structure having a triangular cross section including the outer inflection portion (12) is formed as a vertex. Therefore, the load applied to the joint assembly (20) is reduced and distributed by the truss structure, thereby effectively reducing the deformation amount of the corrugated sheet (1) and concrete due to external force, in other words, the joint assembly. The mechanical strength of (20) can be remarkably increased. Therefore, since the mechanical strength of the joint assembly (20) increases, the corrugated plate (1) maintains sufficient strength against external force even if the height and thickness of the corrugated plate (1) are reduced. The joint assembly (20) can effectively prevent deformation of the corrugated sheet (1) due to external force caused by a vehicle passing through a road in which the expansion joint (10) is embedded. The plurality of first anchor bars (3) connected to the reinforcing plate (2) firmly supports the reinforcing plate (2) constituting the bottom side of the truss structure (25) and the reinforcing plate (2). The mechanical strength of the concrete solidified inside can be further increased. For this reason, even if the height of the corrugated sheet (1) is reduced and a reduced amount of concrete (57) is placed inside the joint assembly (20), the corrugated sheet of reduced thickness ( Even if 1) is used, a sufficiently strong bridge joint assembly can be obtained. Therefore, when the expansion joint (10) is periodically replaced, the concrete (57) can be easily removed and the thickness of the corrugated sheet (1) used can be reduced by the amount that the amount of concrete (57) used can be reduced. The corrugated plate (1) can be easily machined by the amount that can be reduced. Furthermore, since the inclination angle of the connecting part (13) with respect to the traveling direction of the road can be increased and the curvature radii of the outer inflection part (12) and the inner inflection part (11) can be reduced, the conventional expansion joint (30) As compared with the above, it is possible to reduce the impact sound and the collision sound between the vehicle tire and the expansion joint (10) generated when the vehicle passes.

  Further, the expansion joint for a bridge according to the present invention includes a pair of joint assemblies (20) arranged at a predetermined distance from each other, and an elastic water stop member (6) arranged between the pair of joint assemblies (20). With. Each of the pair of joint assemblies (20) includes a plurality of inner inflection portions (11), a plurality of outer inflection portions (12) curved in the opposite direction to the inner inflection portion (11), and an adjacent inner deformation portion. It has a connecting part (13) connecting the curved part (11) and the outer inflection part (12) and is continuous by the inner inflection part (11), the connecting part (13) and the outer inflection part (12). Corrugated metal corrugated metal plate (1) and a pair of connecting parts (13) connected to the outer inflection part (12) facing each outer inflection part (12) Metal reinforcing plate (2), a plurality of metal first anchor bars (3) connected at right angles to each reinforcing plate (2), and the inner side in parallel with the first anchor bar (3) A metal second anchor bar (4) connected to the inflection portion (11). Since the expansion joint (10) can be formed by a combination of a pair of joint assemblies (20) having the same shape and the same structure and capable of mass production, production efficiency can be improved.

  According to the present invention, it is possible to obtain a highly reliable bridge joint assembly and expansion joint that have sufficient strength and can be easily replaced.

The top view which shows embodiment of the joint assembly for bridges of this invention The top view which shows embodiment of the expansion joint for bridges of this invention Sectional view along line III-III in FIG. Sectional view along line IV-IV in FIG. Perspective view of the expansion joint for bridges in FIG. The perspective view which shows the state which laid the expansion joint for bridges of FIG. 2 between floor slabs The perspective view which shows the state which embed | buried the expansion joint for bridges of FIG. 6 in concrete Plan view of a conventional expansion joint for road bridges laid between floor slabs Plan view of a conventional bridge joint assembly

  Embodiments of a joint assembly for a bridge and an expansion joint according to the present invention will be described below with reference to FIGS.

  The joint assembly (20) of the present embodiment shown in FIG. 1 is welded to a corrugated metal plate (1) formed in a regular and continuous corrugated shape and a bottom (1a) of the corrugated plate (1). A metal flat formwork plate (5) fixed by a plurality of substantially rectangular metal reinforcing plates (2) fixed to the corrugated plate (1) at regular intervals, and each reinforcing plate ( 2) Three metal first anchor bars (3) having respective ends connected at right angles to 2), and metal fixed to the corrugated plate (1) in parallel with the first anchor bars (3) And a second anchor bar (4) made of metal. The corrugated plate (1) includes a plurality of inner inflection portions (11), a plurality of outer inflection portions (12) curved in the opposite direction to the inner inflection portion (11), and an adjacent inner inflection portion ( 11) and a connecting portion (13) that connects the outer inflection portion (12) and has a continuous wave shape by the inner inflection portion (11), the connecting portion (13), and the outer inflection portion (12). It is formed. The reinforcing plate (2) is connected by welding to a pair of connecting portions (13) connected to the outer inflection portion (12) so as to face each outer inflection portion (12), and the second anchor bar ( One end of 4) is fixed to each inner inflection portion (11) by welding in parallel with the first anchor bar (3).

The corrugated plate (1) and the reinforcing plate (2) are formed by press forming, roll forming, bending, or forging of a steel material, preferably a general structural rolled steel material, for example, SS400 (JISG3101). For the purpose of weight reduction, the reinforcing plate (2) has a rectangular cross-section lower notch (24) formed on the bottom (2a) and a top portion for the purpose of reducing the weight of concrete before flowing into the joint assembly (20). And an upper notch (26) having an inverted trapezoidal cross section formed in (2b). The reinforcing plate (2) has, for example, a normal length L = 227 mm and a height H ₂ = 125 mm. However, the lower notch (24) of the height H ₃ = 30 mm is provided at the lower portion (2a) of the reinforcing plate (2). And an upper notch (26) having a height H ₄ = 30 mm is provided in the upper part (2b). The lower notch (24) can easily pass the aggregate of the concrete (57) of about 2.5 mm, and can smoothly fill the concrete (57) around the expansion joint (10). The upper notch (26) reduces the area of the upper part (2b) of the flat reinforcing plate (2) exposed from the concrete (57), and the frictional sound with the tire of the vehicle traveling above the expansion joint (10) Decrease. The first anchor bar (3), the second anchor bar (4), and the formwork plate (5) are formed by press molding, roll molding, bending, forging from a corrosion-resistant iron material such as soft iron, steel, and stainless steel. It is formed. The corrugated plate (1), the reinforcing plate (2), the first anchor bar (3), the second anchor bar (4) and the formwork plate (5) are made of the same metal or part or all of them by different metals. Can be formed. As the first anchor bar (3) and the second anchor bar (4), the same anchor bar as in the conventional case can be used.

A substantially constant plate thickness over the entire length: a corrugated plate (1) having a thickness in the range of 9 to 15 mm, preferably 12 mm, has an inner surface (1c) for fixing the reinforcing plate (2) and the second anchor bar (4). And an outer surface (1d) formed on the back side of the inner surface (1c), and both ends (2c) of the reinforcing plate (2) formed by inclined surfaces that match the inner surface (1c) of the connecting portion (13). ) Is welded between the inner inflection part (11) and the outer inflection part (12). If the thickness t of the corrugated sheet (1) is less than 9 mm, the corrugated sheet (1) does not have sufficient strength to withstand the external force of the vehicle, but a metal sheet having a thickness exceeding 15 mm cannot be formed into a corrugated shape by ordinary bending. The height H ₁ of the corrugated plate (1) is in the range of 100 to 150 mm, preferably 125 mm. When the height H ₁ of the corrugated plate (1) is less than 100 mm, the cross-sectional area of the corrugated plate (1) decreases, and the corrugated plate (1) can be easily formed by the vertical bending stress generated when the vehicle passes. There is a risk of deformation. If the height H ₁ of the corrugated plate (1) exceeds 150 mm, it can not be laid as a bottom wall (53) does not reduce the expansion joint (10) of the slab (51), in this case, the floor plate (51 ) The strength of itself decreases.

  In the present specification, “welding” or “welding” may be any one or a combination of known spot (point) welding, butt welding (butt welding, upset welding), arc welding, gas welding, and the like. In the illustrated example, the reinforcing plate (2) is welded with a slight displacement from the middle between the inner inflection part (11) and the outer inflection part (12) to the outer inflection part (12) side. Since it is difficult to weld a plurality of reinforcing plates (2) to the connecting portion (13) by physically aligning them exactly on the same plane, the reinforcing plate (2) from the outer inflection portion (12) The welding position or welding angle may be different or displaced.

  FIG. 2 shows a bridge according to the present invention comprising a pair of joint assemblies (20) arranged at a certain distance from each other, and an elastic water stop member (6) arranged between the pair of joint assemblies (20). An expansion joint is shown. Each of the pair of joint assemblies (20) shown in FIG. 2 is the same as that shown in FIG. 1, has the same shape and structure, and is a combination of a pair of joint assemblies (20) that can be mass-produced. Thus, since the expansion joint (10) can be formed, the production efficiency can be improved. In the state of enforcement shown in FIG. 2, when a pair of corrugated plates (1) having the same shape are rotated and opposed to each other by 180 degrees, the outer surfaces (1d) of the pair of corrugated plates (1) are complementary to each other. Therefore, the inner inflection part (11) and the outer inflection part (12) of one corrugated plate (1) are respectively the inner inflection part (12) and the inner inflection part (12) of the other corrugated plate (1). The end portions (1e) in the wave direction of the pair of corrugated plates (1) disposed on the edge portion (5a) of the mold plate (5) are opposed to the curved portion (11).

  As shown in FIG. 3, the bottom portion (2a) of the reinforcing plate (2) is fixed to the mold plate (5) by welding except for the lower notch portion (24), and as shown in FIG. The top part (2b) of 2) is arranged at the same height as the top part (1b) of the corrugated sheet (1) except for the upper notch part (26). The reinforcing plate (2) is formed in an almost H shape by the lower notch (24) and the upper notch (26), but the uncured concrete (57) is formed by the lower notch (24) and the upper notch. If a sufficient amount of concrete (57) is filled in each part of the corrugated space after passing through (26), the lower notch (24) and the upper notch (26) can be formed into arbitrary shapes. The mold plate (5) is formed of, for example, an iron plate having a thickness of about 6 mm, and uncured concrete (57) filled in the joint assembly (20) is formed between the pair of corrugated plates (1). To prevent spillage.

  For example, one end of each of the three first anchor bars (3) spaced apart from each other and arranged in parallel is welded to a flat reinforcing plate (2) by stud welding (arc welding), and the reinforcing plate ( Each other end of the first anchor bar (3) is extended in a direction away from 2). Conversely, the reinforcing plate (2) on which the three first anchor bars (3) are welded may be later welded to the corrugated plate (1). Conventionally, only the diameter of up to 19 mm can be normally used for the anchor bar (34). However, in the present embodiment, since the reinforcing plate (2) has a large surface area, for example, an anchor bar having a diameter of 22 mm or more ( 3,4) can be used. Further, by using the reinforcing plate (2), the length of the first anchor bar (3) is increased by the length from the outer inflection portion (12) to the reinforcing plate (2). ), The strength against the bending moment of the first anchor bar (3) can be increased.

  One end of the second anchor bar (4) is at the same height as the first anchor bar (3) from the form plate (5), and similarly to the inner inflection (11) of the corrugated plate (1). The other end is stretched in a direction away from the corrugated plate (1). The second anchor bar (4) having a shorter length than the first anchor bar (3) may have the same diameter as the first anchor bar (3). In the illustrated expansion joint (10), the distance between the three first anchor bars (3) and the distance between the first anchor bar (3) and the second anchor bar (4) are different, but the width is large. Weld the reinforcing plate (2) with a flange to the connecting part (13) on the inner inflection part (11) side, so that all the first anchor bars (3) and the second anchor bars (4) are at the same distance It may be arranged and welded. As shown in FIG. 1, the outer edge (5a) of the mold plate (5) formed in the same shape as the wave shape of the corrugated plate (1) is welded to the bottom (1a) of the corrugated plate (1), The inner edge (5b) of the form plate (5) formed in a straight line is welded to the inner inflection (11) of the corrugated sheet (1).

  As shown in FIG. 5, the expansion joint (10) includes a pair of joint assemblies (20) including corrugated plates (1) arranged opposite to each other and spaced apart from each other, and each joint assembly (20 ) And a water stop member (6) disposed between the corrugated plates (1). The pair of joint assemblies (20) have the same shape. The water-stop member (6) is formed of, for example, a synthetic rubber material fixed between a pair of corrugated plates (1) or a synthetic rubber material having a V-shaped cross section, as in the prior art.

In the conventional expansion joint (30) shown in FIG. 8, the amplitude W ₁ of the corrugated plate (37) between the outer inflection portion and the inner inflection portion is of the order of about 65～140Mm, shown in FIG. 2 The “amplitude” W ₂ of the corrugated sheet (1) between the expansion joint (20) of the expansion joint (20) of the present embodiment and the inner bending section (11) is about 150 to 375 mm. Thus, since the corrugated plate (1) of the expansion joint (20) of the present invention has a larger amplitude than the conventional corrugated plate (37), the inner curved portion (11) and the outer curved portion ( The reinforcing plate (2) can be disposed in the space between the first anchor bar (3) and the reinforcing plate (2). When the expansion joint (10) is disposed between the pair of side walls (54) forming the bridge slab (51) shown in FIG. 6, it is closer to the side wall (54) by about 85 to 235 mm than the conventional corrugated sheet (37). Since the inner end (11a) of each inner inflection part (11) of the corrugated plate (1) can be arranged, the length of the second anchor bar (4) extending from the corrugated plate (1) to the side wall (54) Can be shortened. Further, in the present embodiment, the reinforcing plate (2) and the floor are compared with the conventional anchor bar (34) extending between the outer inflection portion (32) and the side wall (54) of the floor slab (51). The length of the first anchor bar (3) extending between the side wall (54) of the plate (51) can be shortened. Furthermore, not only the corrugated plate (1), the first anchor bar (3) and the second anchor bar (4) but also the reinforcing plate (2), the load, impact and vibration applied to the expansion joint (10) from above. Can be supported.

  As in the prior art, the first anchor bar (3) and the second anchor bar (4) are fixed to the rising muscle (55) and the through-bar (56) provided on the floor slab (51). Next, after covering the upper surface of the corrugated plate (1), the water blocking member (6) and the reinforcing plate (2) with the sheet (14), the corrugated plate (1) and the side wall (54) of the floor slab (51) The space between is filled with uncured concrete (57). When filling, the uncured concrete (57) passing through the lower notch (24) of the reinforcing plate (2) enters the triangular space (25) formed by the outer inflection (12) and the reinforcing plate (2). Since it flows in, a sufficient amount of concrete (57) can be filled into the triangular space (25). Furthermore, the flowable concrete (57) reaching the top (1b) of the corrugated plate (1) leaves the top (2b) of the reinforcing plate (2) and the upper notch (26) of the reinforcing plate (2). Filled beyond. Thereafter, an appropriate vibration is applied to the uncured concrete (57) with a vibrator, so that the interior and exterior of the triangular space (25) can be filled with the uncured concrete (57) evenly and sufficiently.

  After the concrete (57) is cured, the expansion joint (10) is fixed to the floor slab (51) by removing the sheet (14) from the top surface of the corrugated sheet (1), the water blocking member (6) and the reinforcing sheet (2). The reinforcing portion shown in FIG. 7 is completed. At this time, the top (2b) of the reinforcing plate (2) and the top (1b) of the corrugated plate (1) are exposed from the concrete (57), and the upper notch (26) of the reinforcing plate (2) is made of concrete ( 57), but the area of the top (2b) of the reinforcing plate (2) exposed from the concrete (57) is reduced, so that the vehicle tire passing through and the top (2b) of the reinforcing plate (2) Impact noise can be reduced. As long as sufficient mechanical strength is obtained, the top notch (26) is formed on the entire top (2b) of the reinforcing plate (2), and the top (2b) of the reinforcing plate (2) is not exposed from the concrete (57). It is good also as a structure.

  In the present embodiment, when the reinforcing plate (2) is connected between the pair of coupling portions (13) so as to face the outer inflection portion (12), the outer inflection portion (12), the pair of coupling portions ( A truss structure (25) having a triangular cross section constituted by 13) and the reinforcing plate (2) is formed with the outer inflection part (12) as a vertex. Therefore, for example, when an external force P is applied to the apex of the outer inflection part (12), P × is applied to the pair of connection parts (13) forming the outer inflection part (12) according to the principle of the truss structure (25). The load due to the external force P is dispersed with a force of 1 / √2. Further, the load is further dispersed at the connecting portion between each connecting portion (13) and the reinforcing plate (2). Thus, the truss structure (25) formed in the outer inflection part (12) has an action of reducing the acting external force by at least about 30% and distributing it to each connecting part (13). The amount of deformation of the plate (1) can be effectively reduced, in other words, the mechanical strength of the corrugated plate (1) can be significantly increased. Therefore, even if the corrugated plate (1) is reduced in height and thickness by the increase in mechanical strength, the corrugated plate (1) maintains sufficient strength against external force, so the joint assembly (20) In addition, it is possible to effectively prevent deformation of the corrugated sheet (1) due to an external force caused by a vehicle passing through a road in which the expansion joint (10) is embedded. The plurality of first anchor bars (3) connected to the reinforcing plate (2) firmly supports the reinforcing plate (2) constituting the bottom side of the truss structure (25) and the reinforcing plate (2). The mechanical strength of the concrete solidified inside can be further increased. For this reason, even if the height of the corrugated sheet (1) is reduced, and the reduced amount of concrete (57) is placed inside the expansion joint (10), the corrugated sheet (1) of reduced thickness is also used. Can be used to obtain a sufficiently strong bridge joint assembly. Therefore, when the expansion joint (10) is periodically replaced, the concrete (57) can be easily removed and the thickness of the corrugated sheet (1) used can be reduced by the amount that the amount of concrete (57) used can be reduced. The corrugated plate (1) can be easily machined by the amount that can be reduced. Furthermore, since the inclination angle of the connecting part (13) with respect to the traveling direction of the road can be increased and the curvature radii of the outer inflection part (12) and the inner inflection part (11) can be reduced, the conventional expansion joint (30) As compared with the above, it is possible to reduce the impact sound and the collision sound between the vehicle tire and the expansion joint (10) generated when the vehicle passes.

  In the present specification, compressive force, tensile force, shearing force, bending moment, buckling load, impact load, and vibration to the bridge joint assembly are collectively referred to as external force. When the reinforcing plate (2) is connected to the pair of connecting portions (13) so as to face the outer inflection portion (12), the outer inflection portion (12), the pair of connecting portions (13), and the reinforcing plate (2) Since the triangular space (25) is formed and the reinforcing plate (2) becomes a fixing member (bracket), the deformation of the adjacent connecting portions (13) in the direction of approaching or separating from each other and the inner inflection portion (11), The mechanical strength of the corrugated plate (1) with respect to deformation due to external force of the connecting portion (13) and the outer inflection portion (12) is remarkably increased. As a result, even if the height and thickness of the corrugated sheet (1) are reduced, the corrugated sheet (1) maintains sufficient strength against external forces, and the joint assembly (20) forms the expansion joint (10). When doing so, it is possible to prevent deformation of the corrugated plate (1), the reinforcing plate (2), and the anchor bar (3,4) due to external force caused by the vehicle passing above the expansion joint (10).

  Since the first anchor bars (3) are fixed to the reinforcing plate (2), the height of the corrugated plate (1) is reduced and the amount of concrete (57) placed in the expansion joint (10) Even if it decreases, sufficient strength can be imparted to the concrete (57) and the expansion joint (10) accompanying the removal of the concrete (57) can be easily replaced periodically. In addition, compared to the conventional bridge joint assembly in which the anchor bar is connected to the curved surface or the inclined surface of the corrugated plate, the plurality of first anchor bars (3) can be easily connected to the reinforcing plate (2), A joint assembly (20) can be formed. Further, even if the vehicle passes through the top (1b) of the corrugated plate (1) having a curved shape with almost no plane perpendicular to the traveling direction of the vehicle, the vehicle tire and the expansion joint (10) Impact and impact noise can be reduced and reduced. Since the strength of the corrugated plate (1) is improved by the reinforcing plate (2), the corrugated plate (1) can be formed by an easy process using a metal plate thinner than the conventional one.

With the above structure, each part of the joint assembly (20) maintains sufficient strength against external forces even when the height of the corrugated sheet (1) is reduced, and the joint assembly (20) forms the expansion joint (10). In doing so, it is possible to prevent the corrugated sheet (1) from being buckled by the load of the vehicle passing above the expansion joint (10). Therefore, the height of the corrugated plate (1) can be reduced, and the amount of concrete (57) placed around the expansion joint (10) can be reduced. Together with the removal of the concrete (57), the expansion joint (10) can be easily replaced periodically. The height of the conventional corrugated plate (37) is about 175 to 230 mm, whereas the height H ₁ of the corrugated plate (1) of the present embodiment is formed in the range of about 100 to 150 mm. Can do. Therefore, since the thickness of the concrete (57) filled in the expansion joint (10) is reduced by about 75 to 80 mm, the gap between the corrugated plate (1) and the reinforcing plate (2) and the floor slab (51) is reduced. Since the amount of concrete (57) filled in can be reduced and anchor bars (3, 4) having a large diameter can be used, the mechanical strength of the constructed expansion joint (10) does not decrease.

Further, the amplitude W ₂ of the corrugated plate (1) between the outer inflection portion (12) and the inner inflection portion (11) is 1.5 to 2.5 times the height H ₁ of the corrugated plate (1). Preferably, when set to 2.3 times, a sufficient space to be arranged in the reinforcing plate (2) is formed between the inner inflection portion (11) and the inner inflection portion (11). ) A plurality of first anchor bars (3) can be fixed. When the expansion joint (10) is installed in the step (52) of the floor slab (51), an appropriate gap for disposing the water stop member (6) is formed between the pair of corrugated plates (1).

  The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made. When the first anchor bar (3) is fixed to the reinforcing plate (2), the first anchor bar (3) is inserted into or attached to the recess or the through hole formed in the reinforcing plate (2). The anchor bar (3) may be welded to the reinforcing plate (2). Similarly, when the second anchor bar (4) is fixed to the corrugated plate (1), the second anchor bar (4) is inserted or mounted in a recess or a through hole formed in the corrugated plate (1). The second anchor bar (4) may be welded to the corrugated plate (1).

  The length of the corrugated plate (1) and the reinforcing plate (2), the inner inflection portion (11), the outer inflection portion (12), the first anchor bar (3) and the second anchor of the corrugated plate (1) The number of bars (4) can be changed as appropriate depending on the size and conditions of the bridge. In order to remove the reinforcing part of concrete (57) in a short time, it is better to reduce the height of the corrugated sheet (1), but the corrugated sheet (1) of the same height as the conventional one is attached with the reinforcing sheet (2). It may be attached. In consideration of the load applied to the expansion joint (10), the number of the first anchor bars (3) fixed to the single reinforcing plate (2) may be three or more or two. In the plan view of FIG. 2, the reinforcing plate (2) is offset and fixed by the one and the other corrugated plate (1), but the reinforcing plate (2) is placed on one and the other corrugated plate (1) in a straight line. It may be fixed. Also, the first anchor bar (3) fixed at the center of one corrugated plate (1) and the second anchor bar (4) of the other corrugated plate (1) are arranged in a line or shifted from each other. You may arrange. Furthermore, the dimensions and shape of the reinforcing bars (55, 56) that fix the height of the first anchor bar (3) and the second anchor bar (4) fixed to the corrugated plate (1) or the reinforcing plate (2). Or you may change according to a position. The first anchor bar (3) and the second anchor bar (4) having not only a circular cross section but also a square cross section may be used.

  If uncured concrete (57) flows into the triangular space (25), the lower notch (24) may be formed in another shape such as a circle. Further, the lower notch (24) may be formed on the entire bottom (2a) without being limited to a part of the bottom (2a) of the reinforcing plate (2). The height of the top portion (2b) of the reinforcing plate (2) may be formed lower than the height of the top portion (1b) of the corrugated plate (1), and the reinforcing plate (2) may be filled with concrete (57).

The amplitude W ₂ of the corrugated plate (1) is 1.5 to 2.5 times, preferably 2.3 times the height H ₁ of the corrugated plate (1). Therefore, the amplitude W ₂ of the corrugated plate (1) is in the range of 150 to 375 mm, preferably 285 mm. The amplitude W ₂ of the corrugated plate (1) is the height H less than 1.5 times the _first corrugated plate (1), the inner curved portion of the plate adjacent the wave (1) (11) large enough between This space cannot be formed, and the flat reinforcing plate (2) cannot be fixed to the outer inflection portion (12) of the corrugated plate (1). In addition, when the expansion joint (10) is laid between the side walls (54) of the floor slab (51), the distance between the two corrugated sheets (1) is greatly separated, so that The area of the rubber (6) that adheres to the vehicle increases, and the impact sound with the vehicle passing through the expansion joint (10) increases. Further, since the distance between the wave (1) and the side wall (54) is widened, the amount of concrete (57) filled around the expansion joint (10) is increased. The amplitude W ₂ of the corrugated plate (1) exceeds 2.5 times the height H ₁ of the corrugated plate (1) can not be installed expansion joint (10) Joint Gap formed seam bridges.

  The present invention can be satisfactorily applied to an expansion joint and an assembly thereof installed at a joint of a road bridge.

  (1) ・ ・ Corrugated plate, (1a) ・ ・ Bottom, (1b) ・ ・ Top, (2) ・ ・ Reinforcement plate, (2a) ・ ・ Bottom, (2b) ・ ・ Top, (3) ・ ・1 anchor bar, (4) ·· 2nd anchor bar, (5) · · form plate, (6) · · waterstop, (10) · · expansion joint, (11) · · inward bending (11a) ・ ・ Tip, (12) ・ Outside inflection, (13) ・ ・ Connection, (20) ・ Bridge joint assembly, (24) ・ Lower notch, (26)・ ・ Upper notch, (51) ・ ・ Floor slab, (54) ・ ・ Side wall,

Claims (6)

Inner inflection having a plurality of inner inflection parts, a plurality of outer inflection parts curved in the opposite direction to the inner inflection part, and a connecting part connecting the adjacent inner inflection part and the outer inflection part A corrugated metal plate formed in a continuous wave shape by a portion, a connecting portion and an outer inflection portion;
A metal reinforcing plate connected to a pair of connecting parts connected to the outer inflection part facing each outer inflection part,
A plurality of metal first anchor bars connected at right angles to each reinforcing plate;
A bridge joint assembly, comprising: a metal second anchor bar connected to the inner inflection portion in parallel with the first anchor bar.   The bridge joint assembly according to claim 1, wherein a lower notch is provided at the bottom of the reinforcing plate.   The joint assembly for bridges according to claim 1 or 2, wherein a flat formwork plate is fixed to the bottom of the corrugated sheet.   The bridge joint assembly according to any one of claims 1 to 3, wherein an upper notch is provided at the top of the reinforcing plate.   The amplitude of the corrugated sheet between the outer inflection part and the inner inflection part of the corrugated sheet is 1.5 to 2.5 times the height of the corrugated sheet. Joint assembly for bridges. A pair of joint assemblies that are spaced apart by a certain distance, and an elastic water stop member that is disposed between the pair of joint assemblies,
Each of the pair of joint assemblies includes a plurality of inner inflection portions, a plurality of outer inflection portions that are curved in the opposite direction to the inner inflection portion, and a connection that connects the adjacent inner inflection portion and the outer inflection portion. And a corrugated metal plate that is formed into a continuous wave shape by an inner inflection part, a connecting part and an outer inflection part, and
A metal reinforcing plate connected to a pair of connecting parts connected to the outer inflection part facing each outer inflection part,
A plurality of metal first anchor bars connected at right angles to each reinforcing plate;
An expansion joint for bridges, comprising: a metal second anchor bar connected to the inner inflection portion in parallel with the first anchor bar.

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