JP2017075448A - Connecting structure of net-shaped body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure which can efficiently connect net-shaped bodies which are formed by connecting band-shaped steel plates in a construction site.SOLUTION: Band-shaped steel plates 11 having widths in a vertical direction, bent in a horizontal direction, and processed so that protrusions and recesses are alternately aligned in a longitudinal direction at both sides are aligned in a plurality of pieces, and net-shaped bodies 10a, 10b which are coupled to each other in a form that the protrusions which are protruded from both the adjacent steel plates are overlapped on each other, are connected in a continuous direction. A plurality of the steel plates 11a-a are alternately protruded at joining end parts of both the connected net-shaped bodies, and the plurality of the steel plates 11a-a which are protruded from one of the two net-shaped bodies at the joining are located in positions which are made to intrude between a plurality of the steel plates 11a-b which are protruded from the other net-shaped body. The steel plates 11a-a, 11a-b which are protruded from both the net-shaped bodies, and adjoin each other are overlapped on each other at the protrusions which are hung out to directions which oppose each other, and coupled to each other by punching processing.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a reticulated body formed by joining a plurality of strip-shaped steel plates, and relates to an asphalt mixture layer such as pavement, a joined structure of a reticulated body embedded in a compacted roadbed or ground. Is.

A technique for embedding a net in an asphalt mixture layer used for road paving is known. This mainly disperses the tensile strain acting on the asphalt mixture layer by the network, and is disclosed in Patent Document 1 and Patent Document 2, for example.
The technique described in Patent Document 1 embeds a net-like body 65 in an asphalt pavement 64 that is continuous over both sides of a gap 63 between a bridge girder 61 and a girder 62 or between a gap between a girder and an abutment as shown in FIG. . Along with the shrinkage of the girders 61 and 62, the pavement 64 has a tensile stress and a tensile strain, which are dispersed by the mesh 65 embedded in the pavement base layer 64a.

  Moreover, the technique described in Patent Document 2 forms a flexible foot plate 74 made of an asphalt mixture layer on a back soil 72 adjacent to a concrete structure 71 such as an abutment as shown in FIG. A steel net 75 is embedded in the tread plate. The flexible foot plate 74 is loosened when the back soil 72 is squeezed and sinks, or when the back soil 72 is deformed due to an earthquake and a step is produced with the concrete structure 71. It is possible to suppress the occurrence of a large step or steep slope on the road surface due to deformation. A steel net 75 is embedded in a footboard made of this asphalt mixture layer, and the tensile stress and strain are dispersed to suppress bending of the asphalt mixture layer or bending with a small radius of curvature. Yes.

  On the other hand, it is also conceivable that a net-like body formed by combining strip-shaped steel plates is used by being embedded in an asphalt mixture layer formed for the purpose other than the pavement base layer and the flexible tread board. For example, as shown in FIG. 11, a subsidence suppression layer 85 made of an asphalt mixture is provided between an upper layer subbase 84 and a lower subbase 83 on both sides of a portion where the structure of a roadbed or a road body changes suddenly. 85 can be embedded with a steel net 87. As a result, it is possible to suppress the occurrence of a step or a steep slope on the road surface at a portion where the structure of the road bed or the road body changes suddenly. Moreover, it is also conceivable to use it in a compacted roadbed or embedded in the ground.

JP 11-93105 A JP-A-8-151602

A net-like body formed by combining the strip-shaped steel plates is manufactured in a factory, and a panel-like one is carried into a site where it is laid. The range in which the mesh body is laid is generally larger than the size of the panel-like mesh body, and a plurality of mesh bodies are connected in the field and are continuously laid.
In the connection of the net-like bodies, the band-like steel plates of the net-like bodies connected to each other are abutted and these are joined by welding. However, it takes much work time to connect each of the strip-shaped steel plates constituting the mesh body by welding.

  The present invention has been made in view of the circumstances as described above, and the purpose thereof is a connection structure for a net-like body that enables efficient connection at a site where a net-like body to which strip-shaped steel plates are combined is laid. Is to provide.

  In order to solve the above-mentioned problems, the invention according to claim 1 is processed so that it has a width in the vertical direction, is bent in the horizontal direction, and convex portions and concave portions are alternately arranged in the longitudinal direction on both sides. A plurality of strip-shaped steel plates are juxtaposed in parallel, and protruding portions projecting from both adjacent steel plates are overlapped with each other, and are connected to each other. A plurality of the steel plates are protruded every other end of each of the mesh bodies to be joined, and a plurality of steel plates projecting from one of the two mesh bodies to be joined are The protruding portions of the steel plates that are adjacent to each other and that protrude from both meshes are overlapped and joined at a position that is inserted between a plurality of steel plates that protrude from the body. Net To provide a connection structure.

In the connection structure of the mesh body, the belt-shaped steel plates protruding from both of the mesh bodies to be connected to each other can be overlapped, and the overlapped portions can be joined together. Therefore, it is possible to employ the same means for joining the steel plates adjacent to each other when the mesh body is manufactured. In other words, it can be joined by means other than welding, for example, by punching the overlapped steel plates and crimping them, or by means of scissors or bolts. Thereby, while being able to shorten the work time in a field, it can control that the unevenness of intensity or rigidity arises in the connected part and other parts.
Moreover, the position which connects each of the steel plate which became strip | belt becomes the position shifted | deviated to every other of the paralleled steel plate, and it can suppress that a connection part becomes a weak point.

  The invention according to claim 2 is the network connection structure according to claim 1, wherein the steel plate is bent so that an inner angle is larger than 90 degrees and smaller than 180 degrees, and the convex portions and the concave portions are formed. The mesh body is a steel hexagon panel in which hexagonal columnar spaces partitioned by the steel plates are formed in a honeycomb shape between adjacent steel plates.

  In this net-like body, the strip-shaped steel plate has a polygonal line shape in a planar shape, and is overlapped with adjacent steel plates at a straight line portion. Therefore, the steel plates protruding from both nets can be joined to each other by overlapping adjacent steel plates at a portion where the planar shape is a straight line. Thereby, the operation | work which couple | bonds can be performed efficiently and the state by which the hexagonal column-shaped space was arranged without a gap also in a connection part is maintained.

  The invention according to claim 3 is the connecting structure for a mesh body according to claim 1 or claim 2, wherein the steel sheet projects from every other one end of the steel sheet projecting from one side of the mesh body. It is assumed that the steel sheet is overlapped with the front end of the steel plate and bonded together.

  In this network connection structure, all the steel plates of the mesh connected to each other are joined so that a tensile force is directly transmitted from the steel plate of one mesh body to the steel plate of the other mesh body.

  The invention according to claim 4 is the network connection structure according to any one of claims 1 to 3, wherein the joining of the overlapping portions of the steel plates is performed by punching both steel plates. Assume that they are joined by deformation of the peripheral edge of the opening.

  In this connection structure of the mesh body, the steel sheets of both mesh bodies to be connected at the site where the mesh body is laid can be overlapped and punched to join the respective steel sheets easily and in a short working time. . Therefore, the nets can be connected efficiently.

  As described above, in the network connecting structure according to the present invention, the same means is used as that for joining adjacent steel plates when manufacturing a network by joining strip steel plates, It is possible to connect the mesh bodies efficiently at the site where they are laid.

It is a schematic perspective view which shows the example of the mesh body which can apply the connection structure which concerns on this invention. It is a schematic perspective view which shows the manufacturing method of the mesh body shown in FIG. FIG. 2 is a schematic perspective view showing a structure for connecting the mesh body shown in FIG. 1 according to an embodiment of the present invention. It is an enlarged plan view which shows the part to which the mesh body shown in FIG. 3 was connected. It is an enlarged plan view which shows the other example of the part which couple | bonds each steel plate of the mesh body used as the panel shape connected mutually. It is an enlarged plan view which shows the other example of the part which couple | bonds each steel plate of the mesh body used as the panel shape connected mutually. It is other embodiment of this invention, Comprising: It is a schematic plan view which shows the connection structure of the mesh body comprised by the some steel plate bent so that a planar shape might become a waveform. It is a schematic plan view which shows the other connection structure of the mesh body comprised by the some steel plate bent so that a planar shape might become a waveform. It is a schematic sectional drawing which shows the usage example of the mesh body which can apply the connection structure of this invention. It is a schematic sectional drawing which shows the other usage example of the mesh body which can apply the connection structure of this invention. It is a schematic sectional drawing which shows the other usage example of the mesh body which can apply the connection structure of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing an example of a mesh body to which the connection structure of the present invention can be applied. FIG. 2 is a schematic perspective view showing a method of manufacturing the mesh body.
A plurality of the net-like bodies 10 are arranged in such a manner that the width direction of the strip-shaped steel plates 11 is up and down, and these adjacent steel plates are joined together to form a net shape. As shown in FIG. 2, each of the strip-shaped steel plates is bent at a predetermined interval so that the inner angle is approximately 120 degrees in the horizontal direction with the width direction up and down, and the two portions 12a bent in the same direction. And two places 12b bent at approximately 120 degrees on the opposite side are alternately provided in the length direction of the strip-shaped steel plate. And the part 13a, 13b which protruded in the direction which these adjacent steel plates 11a, 11b oppose is piled up and couple | bonded. By being combined in this way, as shown in FIG. 1, a substantially hexagonal columnar space 15 partitioned by steel plates becomes a net-like body 10 arranged in a honeycomb shape. It is desirable that the steel plates 11 are bonded so that the stacked steel plates are punched out and caulked by deformation of the peripheral portion of the punched portion 14. Further, the punching may be performed by punching out a portion where a circular or elliptical opening is provided in advance so that the opening is enlarged.
As the steel sheet, for example, a steel sheet having a thickness of about 0.1 mm to 3.0 mm can be used, and preferably a steel sheet having a thickness of about 0.4 mm to 1.6 mm is used. The width can be about 3 mm to 100 mm. In this embodiment, the thickness is 0.8 mm and the width is 20 mm. Each of the hexagons having a honeycomb shape can have a maximum dimension between apex angles of about 30 mm to 200 mm.

  Such a net-like body 10 has a large rigidity against deformation that bends the net-like surface because a plurality of strip-shaped steel plates 11 are arranged with the width direction being up and down and these are joined. That is, it is difficult to carry out transportation or the like by deforming it so that it is wound up. Therefore, such a net-like body 10 is manufactured in the form of a panel in a factory or the like, and is used by being connected in the field.

The network 10 can be connected as follows.
FIG. 3 is a schematic perspective view showing a structure for connecting the mesh body shown in FIG. 1 according to an embodiment of the present invention.
When the band-like steel plates 11 are combined in a factory or the like to form a panel shape, the mesh body 10 is configured so that a plurality of steel plates having the same length in a band shape are alternately displaced in the length direction by a predetermined amount. Are combined. Thereby, as shown in FIG. 3, at the end in the length direction of the strip-shaped steel plate 11, a plurality of joined steel plates 11 are protruded every other one. When the ends of the mesh-like bodies 10a and 10b having such a panel shape are brought into contact with each other, the strip-shaped steel plates 11a-a and 11a-b protrude from both sides. Then, the steel plates 11a-a protruding from one panel-like net 10a are inserted between the steel plates 11a-b protruding from the other panel-like net 10b, and the steel plates 11a-b protruding from the other are adjacent to each other. You can superimpose with things. That is, the protruding steel plate 11a is bent so as to meander on both sides, and as shown in FIG. 3 or FIG. 4, the steel plates protruding from both panel-like nets 10a and 10b protrude in opposite directions. The portions 16a and 16b can be overlapped. Further, the protruding end portion 11d of the steel plate 11a-a is a portion in contact with the adjacent steel plate, and is in contact with the leading end portion 11e of the steel plate 11b-b between the protruding steel plate 11a-b from the other panel-like mesh. Can be. In this way, both the panel-like nets are joined by overlapping and joining the steel plates 11a-a and 11a-b protruding from both panel-like nets 10a and 10b to be joined.

The overlapping steel plates 11a-a and 11a-b are joined by punching the laminated steel plates in the same manner as when joining adjacent steel plates when producing a panel-like net. Can do. That is, an opening is provided by performing a punching process on the steel sheet, and a peripheral edge of the opening protrudes as a so-called burr in the punching direction. Since the burrs protruding from the two stacked steel plates are deformed in close contact with each other, both are caulked and combined.
In addition, in FIG. 3, the punching process part 11c blacked out is a coupling | bond part which performed the punching process in the field in order to join the two mesh bodies 10a and 10b. The hollow punched portion 11d is a joint portion that has been processed when the mesh body is manufactured into a panel shape.

  The bonding of the strip-shaped steel plate 11 may be performed by punching as described above, forming holes in both the stacked steel plates, and caulking with a scissors, Bolts and nuts may be used, but it is desirable to join by punching in order to join efficiently and inexpensively.

In the connection structure of the mesh bodies 10a and 10b described above, the steel plates 11a-a and 11b-b of both of the mesh bodies to be connected face each other so that the tips are abutted, and both are adjacent portions of the adjacent steel plates 11ab. Is bound to. Tensile force is not transmitted between the opposing steel plates 11a-a and 11b-b so as to face each other, but the two panel-like nets are connected so that the tensile force is transmitted by superimposing them. You can also That is, as shown in FIG. 5, the steel plate 21a-a protruding from one panel 20a is inserted between the steel plates 21a-b protruding from the other mesh 20b, and the tip A protrudes. It overlaps with the tip B of the steel plate 21b-b between the steel plates. Then, these steel plates can be joined together by caulking by superposing three steel plates with adjacent portions C of the adjacent steel plates 21a-b and performing a punching process. Moreover, as shown in FIG. 6, each steel plate 31a-a protruding from one mesh body 30a is overlapped with the steel plate 31b-b of the other mesh body 30b at a portion separated from the adjacent steel plate 31a-b. Can be combined. That is, the steel plate 31a of both of the mesh bodies 30a and 30b to be connected at the portion where the steel plate 31b-b of the mesh body 30b moves from the position 32a in contact with one of the adjacent steel plates on both sides to the position 32b in proximity to the other steel plate. -A and 31b-b can be overlapped and these can be joined by punching.
In addition, in the connection structure of the mesh body shown in FIG.4, FIG.5 and FIG.6, the protrusion length of the steel plate which protrudes every other from the mesh body used as the panel shape is limited to the length shown in each figure. Can be set appropriately

The connection structure of the mesh body of the present invention is not limited to the mesh body in which each steel plate is bent at a predetermined angle, but is applied to a mesh body in which a steel plate is bent into a wave shape as shown in FIG. You can also
The mesh bodies 40a and 40b are arranged in such a manner that a plurality of steel plates are arranged in parallel on a flat surface with the width direction of each of the steel plates 41 bent in a wavy shape extending upward and downward, and projecting to opposite sides of adjacent steel plates. This is a combination of contacted parts. Adjacent steel plates are joined by providing an opening in the abutting portion and inserting the rod 42 to deform and crimp the tip portion of the rod.

With respect to such a net-like body, two panel-like ones can be connected as follows.
When the net-like body is manufactured in a factory or the like, a plurality of steel plates 41 having the same length bent in a wavy shape are alternately arranged in parallel in the length direction, and adjacent steel plates are joined to each other. It has a panel shape. Therefore, every other steel plate protrudes at the end in the length direction of the steel plate 41 bent into a wave shape. When the ends of the mesh bodies 40a and 40b that are connected to each other are opposed to each other, as shown in FIG. 7, the steel plates 41a-a and 41a-b protrude from every other side as shown in FIG. The steel plate 41a-a protruding from the reticulated mesh body 40a is inserted between the steel plates 41a-b protruding from the other, and the tip portion D of each steel plate 41a-a is formed into the other panel shape 40b. Are overlapped with the tip E of the steel plate 41b-b that is not protruding. Moreover, the front-end | tip part F of the steel plate 41a-b which protruded from the net-like body 40b used as the other panel shape is similar to the front-end | tip part G of the steel plate 41b-a which is not protruded of the net-like body 40a used as one panel shape. Overlapping. And the net-like bodies 40a and 40b which became two panel shape by couple | bonding with the collar 42 can be connected. As shown in FIG. 7, the position where the front end portions of the steel plates are overlapped is set to a position where adjacent steel plates are combined with each other, and the three steel plates can be overlapped and combined. Moreover, as shown in FIG. 8, the steel plates 51a-a and 51a-b to be connected are connected to the steel plates 51b and 51c adjacent to each other at positions 52 and 53 that are connected to each other. It is also possible to combine them using superposition and ridges 54.
Even in such a network connection structure, the protruding length of the steel plate protruding every other network in the form of both panels is limited to the length shown in FIG. 7 or FIG. Instead, it can be set appropriately.

The network connection structure described above can be applied as follows in the usage examples of the network shown in FIGS.
In the usage example of the mesh body shown in FIG. 9, the mesh body 65 is embedded in the base layer 64a of the pavement formed so as to extend across the gap 63 between the bridge beam 61 and the bridge beam 62 in the bridge portion of the road. The bridge girders 61 and 62 expand and contract due to temperature change, drying shrinkage, and the like, and the gap 63 changes. As a result, the pavement 64 on the gap is stretched or contracted. However, the pavement 64 is placed on the bridge girders 61 and 62 with a sheet 66 or the like interposed between the bridge girders 61 and 62 and the pavement 64. The mesh body 65 disperses the distortion of the pavement 64 over a wide range. When the amount of change between play is large, the mesh 65 needs to be laid so as to be continuous over a wide range and disperse the strain, and is used by connecting a panel-like mesh. The panel-like net-like body 65 is laid with a sheet for sliding on the bridge girder and arranged thereon. Then, the connection portions are sequentially connected by applying the connection structure of the present invention to form a net-like body 65 that is continuous in a predetermined range. A base layer asphalt mixture is spread so as to embed the network 65, and the base layer 64a is formed by rolling. And the surface layer 64b is formed on it and the continuous pavement which straddles the gap 63 is completed.

An example of the use of the net shown in FIG. 10 is that a flexible tread plate 74 is provided on the back soil 72 of the abutment 71, which is a road structure, connected to the abutment 71, and this flexible tread plate is provided. 74 is used by embedding a net 75. On the back soil 72, a roadbed 73 is formed by rolling a mixture of crushed stone, sand or the like whose particle size is adjusted, and a flexible tread plate 74 made of an asphalt mixture is provided thereon. And the pavement 76 which continues from the part on a bridge girder is formed on it.
The range in which the flexible tread plate 74 is provided is determined in consideration of the possibility of large deformation of the back soil 72 during an earthquake or the like in addition to the settlement of the back soil due to repeated application of a load from the road surface. desirable. That is, when a large deformation occurs in the back soil 72, the flexible tread plate 74 is gently deformed to reduce the level difference or steep slope on the road surface and maintain the vehicle traffic. It is preferable to define a range in which the flexible tread plate 74 is provided so that such a function can be exhibited. Therefore, the flexible tread plate 74 may be provided long in the direction of the road lane, and the mesh 75 is continuously embedded in this range.

  When the flexible strut plate 74 is formed, the net-like body 75 is laid out in the form of a panel having a predetermined size on the rolled roadbed, and the end portion thereof is connected to the abutment 71 via a joint fitting 77. Concatenated with And the connection structure which concerns on this invention is applied, and it is set as the net | network body which continues in a predetermined range, and an asphalt mixture is spread | laid and squeezed so that this may be embedded.

The usage example shown in FIG. 11 uses a net-like body for the pavement structure of the road bed or the part of the road body under the road bed where the structure of the road body changes suddenly.
This pavement structure is formed so as to be continuous on both sides of the boundary between the existing ground 81 and the backfill soil 82 after excavation, and is made of an asphalt mixture between the lower layer roadbed 83 and the upper layer roadbed 84. A settlement suppression layer 85 is formed. And the base layer 86a and the surface layer 86b are laminated | stacked on the upper-layer roadbed, and the pavement 86 is comprised.
The subsidence suppression layer 85 is obtained by laying a net-like body 87 on a compacted lower roadbed 83, and laying and rolling the asphalt mixture so as to embed it. Such a settlement suppression layer 85 allows deformation and is reinforced by the mesh body 87 to disperse the strain. Therefore, when a step or a steep slope occurs between the existing ground 81 and the backfill soil 82. In addition, it is possible to suppress the generation of a step or a steep slope on the road surface by being gently deformed. Such a subsidence suppression layer 85 is provided in a range over both sides of the road bed or the sudden change portion of the road body, and the net-like body 87 is used as a continuous one in the above-mentioned range by connecting panels.

  In addition to the boundary between the existing ground and backfill soil after excavation, the part where the structure of the road bed or the road body under the road bed changes suddenly is the area where the structure is provided and this Examples include a boundary portion between adjacent backfill soils and a boundary portion between cut and fill.

  In the example described above, the mesh body is used by being embedded in an asphalt mixture, but in addition to this, the mesh body may be used by being embedded in a roadbed, or may be used by being embedded in a compacted ground. By applying the connection structure of the present invention, it can be laid continuously over a wide range.

10: Net-like body, 11: Strip steel plate, 12: Folded portion of steel plate, 13: Overhanging portion of adjacent steel plate, 14: Extruded overlapped steel plate, 15: Hexagonal column 16: a portion where adjacent steel plates overhang in opposite directions,
20: mesh body, 21: strip-shaped steel plate,
30: Reticulated body, 31: Strip steel plate,
40: mesh body, 41: strip-shaped steel plate, 42: cocoon,
50: Net-like body, 51: Strip-shaped steel plate, 52, 53: Position where adjacent steel plates are joined, 54: Fence,
61: Bridge girder, 62: Bridge girder, 63: Yuma, 64: Pavement, 65: Reticulated body, 66: Sheet,
71: Abutment, 72: Back soil, 73: Roadbed, 74 Flexible footboard, 75: Mesh body, 76: Pavement body, 77: Joining metal fitting,
81: Existing ground, 82: Backfill after excavation, 83: Lower roadbed, 84: Upper roadbed, 85: Subsidence suppression layer, 86: Pavement, 87: Reticulated body

Claims (4)

A plurality of strip-shaped steel plates that have a width in the vertical direction, are bent in the horizontal direction, and are processed so that convex portions and concave portions are alternately arranged in the longitudinal direction on both sides are juxtaposed and project from both adjacent steel plates The projecting portions are overlapped with each other and are connected to each other in a connecting structure for connecting the mesh bodies in the direction in which the steel plates are continuous,
In each joining end part of both nets joined, a plurality of the above-mentioned steel plates are projected every other,
A plurality of steel plates protruding from one of the two mesh bodies to be joined are in positions respectively inserted between a plurality of steel plates protruding from the other mesh body,
A connecting structure for a net-like body, characterized in that protrusions projecting from both net-like bodies and adjacent to each other and protruding in opposite directions are overlapped and joined. The steel sheet is formed such that the convex portion and the concave portion are formed by bending so that the inner angle is larger than 90 degrees and smaller than 180 degrees.
The connection of the mesh body according to claim 1, wherein the mesh body is a steel hexagon panel in which a hexagonal columnar space partitioned by the steel plates between adjacent steel plates is formed in a honeycomb shape. Construction.   The front ends of the steel plates protruding from one side of the mesh body are overlapped with the front ends of the steel plates between the steel plates protruding every other from the other, and are connected to each other. The network connection structure according to claim 1 or 2.   The connection of the part where the said steel plate was piled up is couple | bonded by the deformation | transformation of the peripheral part of an opening produced when both steel plates are piled and punched. The connection structure of the mesh body described in 1.

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