JP6645795B2 - Connection structure of mesh - Google Patents

Description

  The present invention relates to a net-like body formed by combining a plurality of strip-shaped steel sheets, and relates to a joining structure of an asphalt mixture layer such as a pavement, a net-like body embedded in a compacted roadbed or ground. Things.

2. Description of the Related Art There is known a technique for embedding a net in an asphalt mixture layer used for pavement of a road or the like. This is to disperse mainly the tensile strain acting on the asphalt mixture layer by the network, and is disclosed in Patent Documents 1 and 2, for example.
The technique described in Patent Literature 1 embeds a mesh body 65 in an asphalt pavement 64 that is continuous over both sides of a gap 63 between a girder 61 and a girder 62 or a gap between a girder and an abutment, as shown in FIG. 9. . A tensile stress and a tensile strain are generated in the pavement 64 as the girders 61 and 62 shrink, and are dispersed by the net 65 embedded in the base layer 64a of the pavement.

  Further, according to the technique described in Patent Document 2, as shown in FIG. 10, a flexible footboard 74 made of an asphalt mixture layer is formed on a back soil 72 adjacent to a concrete structure 71 such as an abutment. The steel mesh member 75 is embedded in the step board. When the back soil 72 is compacted and settled, or when the back soil 72 is deformed during an earthquake and a step is formed between the back soil 72 and the concrete structure 71, the flexible footboard 74 is gently moved. It is intended to suppress the occurrence of large steps and steep gradients on the road surface due to deformation. A steel mesh body 75 is embedded in the stepping plate made of the asphalt mixture layer to disperse the tensile stress and the tensile strain, thereby suppressing the asphalt mixture layer from being bent or having a small radius of curvature. I have.

  On the other hand, it is also conceivable to use a net-like body formed by joining strip-shaped steel sheets embedded in an asphalt mixture layer formed for a purpose other than the above-described pavement base layer or flexible footboard. For example, as shown in FIG. 11, a settlement control layer 85 made of an asphalt mixture is provided between an upper subbase 84 and a lower subbase 83 on both sides of a portion where the structure of the subgrade or the road body changes suddenly. A steel mesh body 87 can be embedded in 85. As a result, it is possible to suppress the occurrence of a step or a steep gradient on the road surface at a portion where the structure of the roadbed or the road body changes suddenly. It is also conceivable to use it in a compacted roadbed or embedded in the ground.

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

The reticulated body combining the strip-shaped steel plates is manufactured in a factory, and is carried into a site where the panel-shaped one is laid. The range in which the nets are laid is generally larger than the size of the panel-shaped nets, and a plurality of nets are connected on site and laid continuously.
The connection of the nets is performed by butt-joining strip-shaped steel plates of the nets connected to each other, and joining them by welding. However, it takes a lot of work time to connect each of the strip-shaped steel sheets constituting the net-like body by welding.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a connection structure for a net-like body that enables efficient connection at a site where a net-like body to which a strip-shaped steel plate is joined is laid. It is to provide.

In order to solve the above-mentioned problems, the invention according to claim 1 has a width in a vertical direction, is bent in a horizontal direction, and is processed so that convex portions and concave portions are alternately arranged on both sides in a longitudinal direction. A plurality of strip-shaped steel plates are juxtaposed, and convex portions projecting from both adjacent steel plates in directions facing each other are overlapped, and the meshes connected to each other are connected in a direction in which the steel plates are continuous. A plurality of steel plates protruding at every other joining end of the two meshes to be joined, and a plurality of steel plates projecting from one of the two meshes to be joined are formed. The steel plates protruding from one of the meshes are located at positions inserted between the plurality of steel plates protruding from the other mesh, and both of the steel plates protruding from the other mesh and being adjacent on both sides. and, a pair each other It engaged convex portion protruding in a direction is superimposed to provide a connection structure of the mesh-like body coupled.

In this connection structure of a net-like body, a strip-like steel plate protruding from both of the net-like bodies to be connected to each other is overlapped, and these overlapped portions are connected to each other for connection. Therefore, the same means as joining the steel plates adjacent to each other when manufacturing the net can be employed. In other words, it is possible to join by means other than welding, for example, by punching a stacked steel plate and caulking it, or by using studs or bolts. Thereby, the working time at the site can be shortened, and the occurrence of uneven strength and rigidity between the connected portion and other portions can be suppressed.
In addition, the position where each of the strip-shaped steel plates is connected is a position shifted every other steel plate in a row, and it is possible to prevent the connection portion from becoming a weak point.

  The invention according to claim 2 is the connection structure of the mesh body 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 portion and the concave portion are formed. The mesh-like body is a steel hexagonal panel in which a hexagonal prism-shaped space partitioned by the steel plates is formed between adjacent steel plates in a honeycomb shape.

  In this net-like body, the strip-shaped steel plate becomes a broken line in a planar shape, and is overlapped with the adjacent steel plate at a straight line portion. Therefore, the steel plates protruding from both nets can be overlapped with each other at the portion where the planar shape becomes a straight line, and can be joined to each other. Accordingly, the joining operation can be performed efficiently, and the state where the hexagonal prism-shaped spaces are arranged without gaps at the connection portion is maintained.

  According to a third aspect of the present invention, in the connection structure for a mesh body according to the first or second aspect, the steel sheet protrudes from one side of the mesh body, and the steel sheet protrudes every other from the other side. It is assumed that they are overlapped with the tip of a steel plate between them and are connected to each other.

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

  According to a fourth aspect of the present invention, in the connection structure for a mesh body according to any one of the first to third aspects, the joining of the portions where the steel plates are overlapped is performed when both the steel plates are overlapped and punched. It is assumed that the openings are connected by the deformation of the peripheral portion of the opening.

  In the 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 are overlapped and subjected to the punching process, so that the respective steel sheets can be combined easily and in a short working time. . Therefore, the connection of the net can be efficiently performed.

  As described above, the connection structure of the mesh body according to the present invention employs the same means as joining the steel sheets adjacent to each other when fabricating the mesh body by combining the strip-shaped steel sheets, and forming the mesh body. It is possible to connect the nets efficiently at the installation site.

1 is a schematic perspective view showing an example of a mesh body to which a connection structure according to the present invention can be applied. It is a schematic perspective view which shows the manufacturing method of the net-like body shown in FIG. FIG. 2 is a schematic perspective view showing a structure for connecting the nets shown in FIG. 1 according to one embodiment of the present invention. FIG. 4 is an enlarged plan view showing a portion to which the net shown in FIG. 3 is connected. It is an enlarged plan view which shows the other example of the part which couple | bonds each steel plate of the panel-shaped net-shaped body connected mutually. It is an enlarged plan view which shows the other example of the part which couple | bonds each steel plate of the panel-shaped net-shaped body connected mutually. It is another embodiment of this invention and is a schematic plan view which shows the connection structure of the net-like body comprised by the some steel plate bent so that planar shape became 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 planar shape became a waveform. It is an outline sectional view showing the example of use of the net which can apply the connection structure of the present invention. It is an outline sectional view showing other examples of use of a net to which the connection structure of the present invention can be applied. It is an outline sectional view showing other examples of use of a net to which the connection structure of the present invention can be applied.

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.
A plurality of the net-like bodies 10 are arranged such that the width direction of the strip-shaped steel plate 11 is up and down, and these adjacent steel plates are joined together to form a net-like shape. As shown in FIG. 2, each of the strip-shaped steel plates is bent at predetermined intervals so that the inner angle is approximately 120 degrees in the horizontal direction with the width direction up and down, and two places 12a bent in the same direction are formed. And two places 12b bent at approximately 120 degrees on opposite sides are provided alternately in the length direction of the strip-shaped steel plate. The portions 13a, 13b of these adjacent steel plates 11a, 11b projecting in the opposite direction are overlapped and joined. By being connected in this manner, as shown in FIG. 1, a substantially hexagonal prism-shaped space 15 partitioned by a steel plate becomes a mesh-like body 10 arranged in a honeycomb shape. It is desirable that the steel plates 11 be joined by punching out the superposed steel plates and crimping them by deformation of the periphery of the pushed-out portion 14. In the punching process, a portion in which a circular or elliptical opening or the like is provided in advance may be punched so that the opening is enlarged.
The steel plate may have a thickness of, for example, about 0.1 mm to 3.0 mm, and preferably, a thickness of about 0.4 mm to 1.6 mm. The width can be about 3 mm to 100 mm. In the present embodiment, the thickness is 0.8 mm and the width is 20 mm. In addition, each of the hexagons in the honeycomb shape can have a maximum dimension between the apex angles of about 30 mm to 200 mm.

  Such a net-like body 10 has a large rigidity against a deformation that bends a net-like surface because a plurality of belt-like steel plates 11 are arranged with the width direction up and down and are connected to each other. In other words, it is difficult to carry out transportation or the like by deforming it into a wound shape. Therefore, such a net-like body 10 is manufactured in the form of a panel at a factory or the like, and is used by being connected on site.

The connection of the mesh body 10 can be performed as follows.
FIG. 3 is a schematic perspective view showing an embodiment of the present invention and showing a structure for connecting the nets shown in FIG.
The mesh body 10 is configured such that a plurality of strip-shaped steel plates having the same length are alternately shifted in the length direction by a predetermined amount when the strip-shaped steel plates 11 are combined and formed into a panel shape in a factory or the like. Are combined. As a result, as shown in FIG. 3, at the longitudinal end of the strip-shaped steel plate 11, the plurality of bonded steel plates 11 protrude every other. When the joining ends of the panel-shaped nets 10a and 10b are abutted against each other, belt-shaped steel plates 11a-a and 11a-b protrude from both ends. Then, the steel plates 11a-a protruding from the one panel-shaped net 10a are inserted between the steel plates 11a-b protruding from the other panel-shaped net 10b, and adjacent to the steel plates 11a-b protruding from the other. Can be superimposed on things. That is, the protruding steel plate 11a is bent so as to meander to both sides, and as shown in FIG. 3 or FIG. 4, the protruding steel plates protrude from both panel-like nets 10a and 10b in directions facing each other. The overlapped portions 16a and 16b can be overlapped. Moreover, the tip part 11d of the protruding steel plate 11a-a is in contact with the adjacent steel sheet, and abuts with the tip part 11e of the steel sheet 11b-b located between the steel sheets 11a-b protruding from the other panel-shaped mesh. Can be In this way, the two panel-shaped nets are joined by overlapping and joining the steel plates 11a-a, 11a-b protruding from both panel-shaped nets 10a, 10b to be joined.

Bonding of the superposed steel plates 11a-a and 11a-b is performed by performing a punching process on the superposed steel plates in the same manner as connecting adjacent steel plates when manufacturing a panel-like net-like body. Can be. That is, an opening is provided by performing a punching process on a steel plate, and a peripheral portion of the opening projects as a so-called burr in the punching direction. The burrs protruding from the two superposed steel plates are deformed in close contact with each other, so that both are caulked and joined.
In FIG. 3, a punched-out portion 11c that has been blackened out is a joining portion that has been subjected to a punching-out process in order to join the two nets 10a and 10b. The blank punching portion 11d is a joint portion that has been processed when the net-like body is manufactured into a panel shape.

  The connection of the strip-shaped steel plates 11 may be performed by punching as described above, or by forming a hole in both superposed steel plates and caulking with studs, Although a bolt and a nut may be used, it is preferable that the bolts and the nuts be joined by punching for efficient and inexpensive joining.

In the connection structure of the meshes 10a and 10b described above, the steel plates 11a-a and 11b-b of the two meshes connected to each other are opposed to each other so that the tips are abutted, and the continuous portions of the steel plates 11ab adjacent to each other. Is joined to. No tensile force is transmitted between the steel plates 11a-a and 11b-b opposed to each other so as to abut each other, but the two panel-like net-like bodies are connected so that the tensile force is transmitted by overlapping these. You can also. That is, as shown in FIG. 5, the steel plates 21a-a protruding from one of the panel-like nets 20a are inserted between the steel plates 21a-b protruding from the other net-like body 20b, and the tip A is protruding. And the front end portion B of the steel plate 21b-b between the steel plates. Then, these three steel plates can be joined together by caulking by superimposing the three steel plates with the continuous portion C of the adjacent steel plates 21a-b and performing a punching process. Also, as shown in FIG. 6, each steel plate 31a-a protruding from one of the nets 30a overlaps with the steel plates 31b-b of the other net 30b at a portion separated from the adjacent steel plates 31a-b. Can also be combined. In other words, at the portion where the steel plate 31b-b of the net 30b transitions from the position 32a in contact with one of the steel plates adjacent on both sides to the position 32b close to the other steel plate, the steel plate 31a of the two nets 30a and 30b to be connected is connected. -A, 31b-b can be overlapped and they can be joined by a punching process.
In the connection structure of the meshes shown in FIGS. 4, 5 and 6, the protruding lengths of the steel plates projecting from the panel-like meshes every other are limited to the lengths shown in the respective drawings. Can be set appropriately

The connection structure of the mesh body of the present invention is not limited to a mesh body in which each steel sheet is bent at a predetermined angle, but is applied to a mesh body in which a steel sheet is bent in a wave shape as shown in FIG. You can also.
The net-like bodies 40a and 40b are arranged by laying a plurality of steel plates side by side on a flat surface with the width direction of each of the steel plates 41 bent in a wavy shape up and down, and projecting to adjacent sides of the adjacent steel plates. Are joined by abutting portions. The joining of the adjacent steel plates is such that an opening is provided in a contacting portion, and a stud 42 is inserted to deform and crimp the tip portion of the stud.

As for 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 of the same length that are bent in a wavy shape are alternately arranged side by side while shifting the position in the length direction, and adjacent steel plates are joined together. It has a panel shape. Therefore, at the end in the length direction of the steel plate 41 bent in a wavy shape, a plurality of steel plates are projected every other. When the ends of the two panel-shaped mesh members 40a and 40b to be connected are opposed to each other, steel plates 41a-a and 41a-b protrude from every other as shown in FIG. The steel plates 41a-a protruding from the reticulated body 40a are inserted between the steel plates 41a-b protruding from the other, and the leading end D of each of the steel plates 41a-a is connected to the other panel-shaped reticulated body 40b. Of the steel plate 41b-b which does not protrude. In addition, the front end portion F of the steel plate 41a-b protruding from the other panel-shaped mesh member 40b is similarly connected to the front end portion G of the non-projecting steel plate 41b-a of the one panel-shaped mesh member 40a. Overlap. Then, two panel-shaped nets 40a and 40b joined by the studs 42 can be connected. The position where the tips of the steel plates are overlapped is set at a position where the adjacent steel plates are joined together as shown in FIG. 7, and three steel plates can be overlapped and joined. Also, as shown in FIG. 8, the steel plates 51a-a, 51a-b to be connected have their tips H, L between the positions 52, 53 where they are joined to the steel plates 51b, 51c adjacent on both sides. It is also possible to superimpose and connect using a stud 54.
In addition, even in such a connection structure of a net, the protruding length of the steel plate protruding every other one of the nets in the form of both panels is limited to the length shown in FIG. 7 or FIG. Instead, it can be set appropriately.

The mesh connection structure described above can be applied as follows in the usage examples of the mesh shown in FIGS. 9 to 11.
In the use example of the mesh body shown in FIG. 9, the mesh body 65 is embedded in a base layer 64 a of a pavement formed so as to be continuous over a gap 63 between a bridge girder 61 and a bridge girder 62 in a bridge portion of a road. The bridge girders 61 and 62 expand and contract due to temperature change, drying shrinkage, and the like, and the play 63 changes. Accordingly, the pavement 64 in the play space undergoes an elongation or shrinkage strain, but the pavement 64 is placed on the bridge girder 61, 62 by interposing a sheet 66 or the like between the bridge girder 61, 62 and the pavement 64. The net 65 allows the strain of the pavement 64 to be dispersed over a wide range. When the amount of change in play is large, it is necessary to lay the mesh member 65 so as to be continuous over a wide range to disperse the strain, and the mesh member 65 is used by connecting panel-like mesh members. The panel-shaped mesh body 65 is provided with a sheet for sliding on the bridge girder, and is arranged thereon. Then, the connection portions are sequentially connected by applying the connection structure of the present invention to form a net 65 continuous in a predetermined range. The asphalt mixture of the base layer is spread so as to embed the net-like body 65, and is pressed to form the base layer 64a. Then, a surface layer 64b is formed thereon to complete a continuous pavement straddling the play space 63.

An example of the use of the net-like body shown in FIG. 10 is that a flexible footboard 74 is provided on a back soil 72 of an abutment 71 as a road structure so as to be connected to the abutment 71. 74 is used by embedding a reticulated body 75. On the back soil 72, a roadbed 73 formed by rolling a mixture of crushed stone, sand, or the like whose grain size has been adjusted is formed, and a flexible footboard 74 made of an asphalt mixture is provided thereon. Then, a pavement 76 continuous from a portion on the bridge girder is formed thereon.
The range in which the flexible stepping plate 74 is provided should be determined in consideration of the possibility that the back soil 72 will be greatly deformed during an earthquake or the like, in addition to the settlement of the back soil caused by the load repeatedly applied from the road surface. desirable. In other words, when a large deformation occurs in the back soil 72, the flexible footboard 74 is gently deformed to reduce the occurrence of steps or steep slopes on the road surface, thereby maintaining the traffic of the vehicle. The range in which the flexible step board 74 is provided may be determined so that such a function can be exhibited. Therefore, the flexible step board 74 may be provided long in the direction of the lane of the road, and the mesh member 75 is continuously embedded in this range.

  When the flexible stepping plate 74 is formed, the net-like body 75 is formed by laying out a panel-shaped one having a predetermined size on the rolled roadbed, and the end portion thereof is connected to the abutment 71 via a joint fitting 77. Is linked to Then, the connection structure according to the present invention is applied to form a continuous mesh in a predetermined range, and the asphalt mixture is spread and pressed so as to embed the mesh.

The example of use shown in FIG. 11 uses a net-like material for a pavement structure in a portion where the structure of a roadbed or a road body below the roadbed 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 roadbed 83 and the upper roadbed 84. A subsidence suppression layer 85 is formed. The base layer 86a and the surface layer 86b are laminated on the upper roadbed to form the pavement 86.
The subsidence suppressing layer 85 is formed by laying a net-like body 87 on the compacted lower subbase 83 and spreading the asphalt mixture so as to embed the net-like body 87 and rolling it. Such a subsidence suppressing layer 85 allows deformation and is reinforced by the mesh body 87, and the strain is dispersed. Therefore, when a step or a steep gradient occurs between the existing ground 81 and the backfill soil 82, In addition, it is possible to suppress the occurrence of steps and steep gradients on the road surface due to gentle deformation. Such an anti-settling layer 85 is provided in a range extending over both sides of the roadbed or the suddenly changing portion of the road body, and the net-like body 87 is connected as a panel-like body and is used as a continuous one in the above range.

  In addition, the part where the structure of the roadbed or the road body under the roadbed changes suddenly is not only the boundary between the existing ground and the excavated backfill soil, but also the area where the structure is provided and A boundary portion between the adjacent backfill soil and a boundary portion between the cut soil and the embankment are exemplified.

  In the example described above, the mesh is used by being embedded in the asphalt mixture.In addition, it is also possible to use the network by being embedded in the roadbed, or to be used by being embedded in the compacted ground, The connection structure of the present invention can be applied to continuously lay over a wide range.

10: Reticulated body, 11: Strip-shaped steel plate, 12: Bent portion of steel plate, 13: Portion of adjacent steel plate projecting in the opposite direction, 14: Portion of laminated steel plate punched out, 15: Hexagonal column Space, 16: a portion where adjacent steel plates protrude in directions facing each other,
20: reticulated body, 21: strip-shaped steel sheet,
30: reticulated body, 31: strip-shaped steel sheet,
40: reticulated body, 41: strip-shaped steel plate, 42: tack,
50: Reticulated body, 51: Strip-shaped steel plate, 52, 53: Position where adjacent steel plates are joined, 54: Tack,
61: Bridge girder, 62: Bridge girder, 63: Yuma, 64: Paved body, 65: Reticulated body, 66: Sheet,
71: Abutment, 72: Back soil, 73: Roadbed, 74 Flexible footboard, 75: Reticulated body, 76: Pavement, 77: Joint fitting,
81: Existing ground, 82: Backfill soil after excavation, 83: Lower subgrade, 84: Upper subgrade, 85: Subsidence control layer, 86: Pavement, 87: Reticulated body

Claims (4)

A plurality of strip-shaped steel plates having a width in the vertical direction, bent in the horizontal direction, and processed so that the convex portions and the concave portions are alternately arranged in the longitudinal direction on both sides are arranged in parallel, and both of the adjacent steel plates are Convex portions projecting in opposite directions are overlapped, and the mesh structure is connected, the mesh structure connecting the steel plate in a continuous direction,
At each joint end of the two mesh bodies to be joined, the plurality of steel plates are projected every other,
A plurality of steel plates protruding from one of the two nets to be joined are located at positions respectively inserted between the plurality of steel plates protruding from the other net,
Each of the steel sheets protruding from one of the reticulated bodies is characterized in that both of the steel sheets protruding from the other reticulated body and adjacent on both sides are overlapped with and bonded to the protruding portions protruding in the directions facing each other. Connection structure of the mesh. The steel plate is bent so that the inner angle is larger than 90 degrees and smaller than 180 degrees to form the convex portion and the concave portion,
The connection of the mesh body according to claim 1, wherein the mesh body is a steel hexagonal panel in which a hexagonal column-shaped space partitioned by the steel plates is formed between adjacent steel plates in a honeycomb shape. Construction.   The tip of the steel plate protruding from one of the meshes is overlapped with and joined to the tip of a steel plate between the steel plates protruding every other from the other. A connection structure for a mesh body according to claim 1.   The joint of the parts where the steel plates are overlapped is joined by deformation of the peripheral portion of the opening, which occurs when both steel plates are overlapped and punched out, and wherein the steel plates are joined together. 3. The connection structure of a mesh body according to 1.

Images