JP3999804B2 - Wall material connection method - Google Patents

Description

The present invention relates to a method for connecting wall materials. More particularly, the wall material to reinforce the retaining wall, such as outer wall or slope which can be the embankment, coupled laterally is suitably employed when large, wall material using the wall connector of a special structure It relates to the connection method.

  Conventionally, roads have been added to valleys and depressions by embankment methods, river embankments and steep sabo walls are constructed by embankment methods, shrub forests are opened and farms, crops, flowers, fruit trees, etc. When changing to a cultivated land that can be cultivated, leaving the embanked flat surface in bare land causes problems such as erosion, landslides due to increased water content, and soil drainage due to rainwater. In that case, there was a problem that ground subsidence and dissimilar (equal) subsidence occurred.

In order to solve such problems, wall materials are arranged on steeply inclined surfaces with an angle of 45 degrees or more with respect to the horizontal plane to prevent soil runoff due to landslides and rainwater, and to reinforce the embanked soil. In order to prevent shearing of the embankment and stabilize the strength of the embankment, a plurality of embankment reinforcing materials are widely attached to the embankment ground (inside) in the flat soil. The steeply inclined retaining wall is made of an expanded metal wall surface material (hereinafter, this may be abbreviated as an L-shaped EPM wall surface material) whose side surface structure as the wall surface material is L-shaped. It is reinforced (see, for example, Japanese Patent Publication No. 63-11488 and Japanese Patent Laid-Open No. 8-284173). Further, it is reinforced by a lattice-shaped wall surface material (hereinafter, this may be abbreviated as an L-shaped lattice-shaped wall surface material) in which a metal bar is welded vertically and horizontally to make the side structure L-shaped (for example, (See JP-A-5-287750, JP-A-2001-49668, etc.).

  When retaining walls such as outer walls or slopes created by embankment are wide in the vertical and horizontal directions when viewed from the front, L-shaped EPM wall materials or L-shaped lattice wall materials are stacked and connected in multiple layers. Built. For example, in the case of widening up and down, a geogrid or resin net embankment reinforcement is connected to the flat part of the wall material (the side buried with the embankment soil), and embankment is placed on this embankment reinforcement. Then, the next wall material is stacked on top of this to form a retaining wall, and the same is embanked to form the second layer, and this procedure is repeated to obtain a predetermined height as a plurality of layers. (For example, refer to Japanese Patent Laid-Open No. 5-287750).

On the other hand, in the case of widening to the left and right, a method is adopted in which the lateral ends of the wall surface material are brought into contact with each other and connected to form a wide width. As a method for connecting the end portions of the wall surface in the lateral direction, Japanese Patent Application Laid-Open No. 2001-49668 describes a method of connecting with a wire, a wire clip, a bolt / nut, or the like. However, the method using a wire has a drawback that the connecting operation is complicated and skill is required. In addition, the method of connecting with wire clips, bolts and nuts, etc. is complicated and requires skill, and in cold seasons and cold areas, it is difficult to work with the hands of workers and it takes time. there were.
Japanese Patent Laid-Open No. 08-218314

Under these circumstances, the present inventors have reached the present invention as a result of intensive studies to provide a connection technique that eliminates the above-mentioned conventional drawbacks. That is, the object of the present invention is as follows.
1. To provide a method for connecting wall materials using a connector having a special structure that facilitates connection work when connecting the end portions in the horizontal direction of the wall materials.
2. To provide a method for connecting wall materials that do not require skill in connection work and are not easily affected by the season.

In order to solve the above-described problems, in the present invention, when the lateral end portions of the metal wall surface material (A) are brought into contact with each other and connected, first, a metal plate having a square planar shape is formed at a substantially central portion in the length direction, and the side surface. A U-shaped gap is formed by bending so that the shape exhibits a U-shape, and the tops face each other at a position closer to the opening than the center of the opposing surface along the U-shaped opening. Using a wall material connector (I) in which a U-shaped bent portion having a U-shape is provided so as to have a narrow width, and the opening interval of the U-shaped gap is made larger than that of the other facing surface. After fitting the upper end of one metal wall material to be connected to the gap of the wall material connector (I), slide the wall material connector (A) to the other metal wall material side to be connected The upper end of the metal wall material is connected to the upper end of the two metal wall materials. Then, by folding the long metal rod at the substantially central portion in the length direction, a U-shaped bent portion is provided, and slightly longer from the central portion in the length direction of the two long parallel metal rod portions. A U-shaped bent portion having a U-shaped side surface is provided opposite to the offset portion to form a hook and hook shape, and the tip of the U-shaped bent portion is maintained while maintaining the parallelism of the two metal rod portions. Use the wall material connector (II), which has an enlarged opening with the side bent slightly outward, and have two openings on the tip side of the U-shaped bent portion of the wall material connector (II) After protruding from the lower back side of the horizontal strand etc. to the front side with the vertical strand of the metal wall material (A) or the metal rod at the side end in between, the horizontal strand etc. is fitted to the U-shaped bent part And let the front ends of the two metal rods be a horizontal strand of metal wall material (A). By is positioned under the back of the equal, characterized by connecting the elevation portion of the metal wall material, to provide a method of connecting the wall material.

The present invention is as described in detail below, has the following effects, and has an extremely great industrial utility value.
1. In the method of the present invention , a wall surface material connector (I) (a saddle type connection device) having a special structure is used. Since both the reinforcing bar and the metal bar are fitted and connected to each other, even if there is a load from the back surface of the upright portion of the L-shaped wall material, a load from the layer stacked on the upper side, etc. Only the wall surface material (A) does not protrude and displace to the surface side of the retaining wall, and the surface of the retaining wall is not uneven.
2. The method of the present invention employs a method of connecting wall materials using a wall material connector (I) (saddle type connector) and wall material connector (II) (hook type connector) having a special structure . , the number of parts used as compared with the conventional method using bolts and nuts is less, without requiring skilled work, seasonal regardless can also be very efficiently connected.

Hereinafter, the present invention will be described in detail.
The wall surface material connector (I) used in the method of the present invention is prepared from a metal plate having a square planar shape. A U-shaped gap is formed by bending a metal plate having a square planar shape at a substantially central portion in the length direction so that the side surface has a U-shape. The U-shaped gap portion is a reinforcing rod at the upper end of the wall surface material (A) in a state where both ends of the two wall surface materials (A) are abutted when connecting the two wall surface materials (A). Even if there is a load from the back of the elevation part of the L-shaped wall material and a load from the layer stacked on the upper side, a single wall material (A) Only functions so that it does not protrude to the whole surface or sink downward.

In the wall material connector (I), further along the opening of the U-shaped gap, the top is opposed to and close to the position closer to the opening than the center of the facing surface. A “character-shaped bent portion” that is bent into a “character-shaped” is provided, and the distance between the openings of the U-shaped gap is made larger than the distance between the other opposing surfaces (see FIG. 1 below). The square-shaped bent portion makes it difficult to remove the wall surface material connector fitted to the metal round bar at the upper end of the wall surface material (A) and functions as a rib that reinforces the wall surface of the wall surface material connector (I). . Since the wall surface material connector (I) has an appearance similar to a riding saddle, it can be referred to as a “saddle-shaped connector”.

The metal plate constituting the wall surface material connector (I) is selected from an iron plate, a stainless steel plate, and other alloy steel plates. If the thickness of the metal plate is too thin, the strength as the wall material connector (I) will not be sufficient, and if it is too thick, it will be heavy and difficult to handle. ~ 2 mm is preferred. Wall material connector (I) length (dimension from top to bottom opening when wall material is connected) and width (dimension from one end to the other in the direction perpendicular to the length direction) ) Depends on the size of one wall material to be connected, but the length can be selected within the range of 2 to 8 cm and the width of 5 to 20 cm.

The wall surface material connector (II) is prepared by a long metal rod. A “U-shaped bent portion” is provided by bending a long metal rod at substantially the center in the length direction. The U-shaped bent portion grips the side end strands or side end metal rods of two adjacent wall surfaces between two long parallel metal rods extending from the bent portion. It functions so as not to spread between wall materials. Between the U-shaped bent portions, the dimensions are such that the side end strands or the vertical metal bars vertically arranged at the side ends can be gripped by being arranged on the rising surface portions of two adjacent metal wall materials. Is preferred.

The wall material connector (II) has two long metal rod parts after the U-shaped bent part is formed, and two metal parts on the part slightly away from the center in the longitudinal direction. A U-shaped bent portion having a U-shaped side surface is provided with the rod portion maintained parallel. The wall surface material connector (II) provided with the U-shaped bent portion and the U-shaped bent portion in this way has an appearance similar to a hook and hook used in sewing, and is therefore referred to as a “hook-type connected device”. be able to. The U-shaped bent part is a pair of adjacent metal wall material strands, strand crossing parts, or horizontal metal bars arranged horizontally on the wall surface material (hereinafter these are abbreviated as horizontal strands or the like). It functions so that a gap is not formed in this part or the gap is not enlarged.

  The wall surface material connector (II) is further bent with the front end side of the U-shaped bent portion slightly outward to form an enlarged opening (see FIG. 2 described later). If the opening is made large, workability when connecting the wall material coupler (II) by inserting and holding two adjacent metal wall material horizontal strands in the U-shaped bent part Is preferable.

  The metal rod constituting the wall surface material coupler (II) can be prepared from iron, stainless steel, other alloys, etc., and may be a hollow pipe. The thickness or diameter of the metal bar depends on the type of metal, but if it is too thin, the strength will be insufficient, and if it is too large, the bending process will be complicated and the cost will be high. Among them, 3 to 8 mm is particularly preferable. The length of the wall material connector (II) (the dimension from the outer end of the U-shaped folded part to the outside of the U-shaped folded part) and the width (the dimension between the two parallel metal rod part outer ends) are: Although depending on the size of one wall material to be connected, the length can be selected within the range of 3 to 10 cm and the width within the range of 2 to 10 cm.

The wall material connected by the above-mentioned wall material connector (I) (saddle type connector) is a reinforcement that can be fitted to the U-shaped bent portion of the wall material connector (I) at the upper end portion of the wall surface material. There is no particular limitation as long as a bar, metal bar, etc. are provided, and the wall surface material connected by the wall surface material connector (II) (hook type connector) is connected to the wall surface material connector (II ) Is not particularly limited as long as it has a transverse strand or the like that can be fitted into the U-shaped bent portion.

  Specific examples of the wall surface material (A) include, but are not limited to, an L-shaped EPM wall surface material (A1) or an L-shaped lattice wall surface material (A2). The expanded metal (EPM) constituting the L-shaped EPM wall material (A1) is manufactured by engraving a predetermined cut in a thin steel plate and extending it in one direction. Specifically, those having a diamond-shaped or turtle-shaped mesh shown as a schematic plan view in FIG. Examples of the types of steel sheets for EPM production include general structural rolled steel sheets, hot rolled steel sheets, cold rolled steel sheets, and the like. The thickness of the steel sheet before stretching is 3 to 15 mm, the stretching ratio in the vertical and horizontal directions is selected in the range of 3 to 10 times, and the planar structure is a rhombus or turtle shell-shaped mesh.

The thickness of the metal strands forming the diamond-shaped or turtle-shaped mesh is 3 to 10 mm in diameter, and the size of the mesh (gap) of the turtle-shaped mesh is the long diameter (in the case of turtle-shaped, the length from the head to the tail of the mesh) )) Is preferably 50 to 200 mm, and the short diameter (in the case of the turtle shell shape) is preferably in the range of 20 to 300 mm between the parallel strands forming the mesh. The size of the turtle shell shape can be adjusted by the thickness of the steel plate, the length of the cuts to be cut in the steel plate, the density to be cut, the draw ratio, and the like.

The lattice-shaped structure constituting the L-shaped lattice-shaped wall surface material (A2) includes a plurality of metal bars (a1) and a plurality of metal bars (a2) arranged at right angles to each other in a lattice shape. It is a structure manufactured by welding at a portion where both are orthogonal to each other, and has a structure shown as a schematic plan view in FIG. The metal rod (a1) and the metal rod (a2) constituting the lattice wall material can be prepared from iron, stainless steel, other alloys, etc., and may be hollow pipes. The cross section of the metal bar cut at right angles to the length direction may be either a circle or a polygon such as a rectangle, but a circle is preferred from the standpoint of availability and cost. For the purpose of preventing rust after the metal rod is welded in a lattice shape, it is preferable to apply rust prevention plating, application of a rust prevention paint, coating with a resin or the like to the surface.

  The diameter of the metal bar (a1) and metal bar (a2) depends on the type of metal, but if it is too thin, the strength will be insufficient, and if it is too large, it will become heavy and the cost will be high. In this case, it is preferable to select in the range of 3 to 10 mm, and 5 to 8 mm is particularly preferable. The sizes of the metal bar (a1) and the metal bar (a2) may be the same or different, and the diameter can be changed depending on the position where the metal bar (a1) and the metal bar (a2) are arranged in the lattice structure.

  If one wall material (A) is too wide or too long, the production and bending of the wall material (A) will become complicated, and it will be too heavy for storage, transportation, construction work, etc. Since it becomes difficult, it is usually preferable to select in the range of 0.3 to 2.5 m. The wall surface material (A) is a L-shaped EPM wall surface material (A1) or L-shaped lattice wall surface material (A2) having a square planar structure, and the length direction is substantially at the center of the length direction. The L-shaped EPM wall surface material (A1) or the L-shaped lattice-shaped wall surface material (A2) is bent at a right angle to the surface. The upright part of the L-shaped wall material forms the outer wall or slope of the wall formed by embankment, and the flat part of the L-shaped wall material is connected to embankment reinforcement such as geogrid or resin net The The bending angle of the wall material is selected in the range of 45 to 90 degrees.

Next, a method of connecting the wall surface material (A) using the wall surface material connector (I) (a saddle type connector) having a special structure will be described. First, the upper end part of one metal wall surface material (A) which should be connected is fitted to the space | gap part of wall surface material connector (I). Next, the upper end portion of the other metal wall surface material (A) to be connected, which is disposed adjacent to one metal wall surface material (A) and the wall surface material connector (I) is disposed in contact with the width direction end portion. It is slid to the side, and is positioned so as to straddle two adjacent metal wall member upper ends (see FIG. 6 described later).

  Next, a method of connecting the wall surface material (A) using the wall surface material connector (II) (hook type connector) will be described. First, the opening side end of the wall material connector (II) is sandwiched between the side end strands of the two metal wall surface materials (A) or the vertical metal round bars arranged vertically on the side ends. It protrudes from the lower back side to the front side, such as horizontal strands that are arranged horizontally on the vertical surface of the material. Next, a horizontal strand or the like is fitted into the U-shaped bent portion, and the tip end portions of the two metal rod portions are positioned on the lower back side of the horizontal strand of the metal wall material (A) (see FIG. 7 described later). ).

The wall surface material connector (I) (saddle-shaped connector) is used only when linking across the upper ends of two adjacent metal wall materials. Wall material connector (II) (hook type connector) is used when connecting two horizontal strands of two adjacent metal wall materials, and straddling the upper end of the metal wall material. Can also be used when In particular, the upper end of the metal wall material is connected by the wall material connector (I) (a saddle type connector), and the central portion in the height direction of the vertical portion of the metal wall material is connected to the wall material connector (II) ( Combining the methods of connecting with a hook-type connector) is particularly preferable because the connection can be made more firmly and surely, and the vertical surface portion of the wall surface material is less likely to be displaced.

Hereinafter, the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to the following description examples as long as the gist thereof is not exceeded.

FIG. 1 is a perspective view of an example of a wall surface material connector (I) (a saddle type connector) used in the method of the present invention , and FIG. 2 is a perspective view of an example of a wall surface material connector (II) (a hook type connector). 3 is a schematic plan view of an example of an expanded metal having a rhombus mesh, FIG. 4 is a schematic plan view of an example of an expanded metal having a turtle shell shape, and FIG. 5 is a schematic plan view of an example of a lattice wall material. FIG. 6 is a perspective view showing a state in which two metal wall materials are connected by the wall material connector (I), and FIG. 7 is a state in which two metal wall materials are connected by the wall material connector (II). It is a perspective view shown.

  The wall surface material connector (I) can be easily manufactured by bending a metal plate having a square planar shape. The plane shape is substantially the center in the length direction of the rectangular metal plate, and the side shape is bent so as to be U-shaped to provide a U-shaped gap 11, which is opposed to the opening 12 of the U-shaped gap. At the position of the opening side from the center part of the surface, there is provided a rectangular bent portion 13 that exhibits a “shaped shape” so that the tops are opposed to each other and become narrower, and the distance between the openings 12 is opposite to the other. Make it larger than the distance between the faces.

The wall surface material connector (II) can be easily manufactured by bending a long metal bar. A U-shaped bent portion 21 is provided by bending a long metal rod at a substantially central portion in the length direction, and a portion of the two long parallel metal rod portions slightly offset from the central portion in the length direction. In addition, a U-shaped bent portion 22 having a U-shaped side surface is provided to form a “hook-and-hook shape”, and the distal end portion 23 of the U-shaped bent portion is slightly outside while maintaining the parallelism of the two metal rod portions. The opening 24 is bent and enlarged.

  3 and 4, 31 and 41 are strands, 32 and 42 are gaps, 33 and 43 are joints, FIG. 3 is a rhombus mesh, and FIG. 4 is a tortoiseshell shape. A mesh is formed. In FIG. 5, 51a and 51b are metal bars, 52 is a welding part, 53 is a space | gap part.

In FIG. 6, the vertical round bars 61a and 61b at the side ends of the two L-shaped lattice wall materials 60a and 60b are arranged in contact with each other, and are connected by the wall material connector (I) (a saddle connector). Shows the state. In order to make it like FIG. 6, the upper end part 61a of one metal wall surface material 60a which should be connected is first fitted to the U-shaped space | gap part of wall surface material connector (I). Next, the other metal wall surface material 60b to be connected is placed with the side end portions 61a and 61b in contact with each other, and the wall surface material connector (I) is slid on the upper end portion 61a of the metal wall surface material 60a, As shown in FIG. 6, the wall surface material coupler (I) may be positioned so as to straddle the upper end portions 61a and 61b of the two adjacent metal wall surface materials 60a and 60b. FIG. 6 shows an example in which the wall surface material coupler I has a width extending over each of the two vertical round bars of the L-shaped lattice-shaped wall surface materials 60a and 60b. The wall material connector (I) may have a width extending over three vertical round bars.

  In FIG. 7, the vertical round bars 61a and 61b at the side ends of the two L-shaped lattice wall materials 60a and 60b are arranged in contact with each other, and are connected by a wall material connector (II) (hook type connector). Shows the state. To make it as shown in FIG. 7, first, the opening on the front end side of the U-shaped bent portion of the wall surface material connector (II) is used as a vertical round bar at the side end portions of the two metal wall surface materials 60a and 60b. It protrudes from the lower side of the horizontal round bars 62a and 62b to the front side, which is the back side of 61a and 61b. Next, the opening 24 of the wall material connector (II) is applied to the horizontal round bars 62a and 62b, the horizontal round bars 62a and 62b are fitted into the U-shaped bent part from the opening 24, and the tip 23 is set to the horizontal round bar 62a. , 62b. In addition, 63a and 63b are vertical round bars.

According to the method of the present invention, a retaining wall such as an outer wall or a slope made by embankment can be widened by connecting it laterally by means of a specially constructed wall material connector (I), and at the same time a metal by a wall material connector (II). It can be reinforced by connecting the elevations of the wall material . According to the method of the present invention, bolts and nuts are not used, and the number of parts used is small compared to the conventional method, so it is suitable when working in a low temperature period or a cold region, or when there is no skilled worker. is there.

It is a perspective view of an example of the wall surface material connector (I) used by this invention method . It is a perspective view of an example of wall surface material connector (II). It is a plane schematic diagram of an example of an expanded metal of a rhombus mesh. It is a plane schematic diagram of an example of an expanded metal of a turtle shell-shaped mesh. It is a plane schematic diagram of an example of a lattice wall material. It is a perspective view which shows the state which connected two metal wall surface materials by wall surface material connector (I). It is a perspective view which shows the state which connected two metal wall surface materials with wall surface material connector (II).

Explanation of symbols

I: Wall material connector (I)
II: Wall material connector (II) (hook type connector)
11: U-shaped gap portion 12: Opening portion 13: Square-shaped bent portion 21: U-shaped bent portion 22: U-shaped bent portion 23: Tip portion 24: Opening portion 31, 41: Strand 32, 42: Gaps Parts 33 and 43: Coupling parts 51a and 51b: Metal rod 52: Welding part 53: Cavity part
60a, 60b: Metal wall materials 61a, 61b: Vertical round bars 62a, 62b: Horizontal round bars at the side ends

Claims (3)

When contacting and connecting the lateral end portions of the metal wall surface material (A), first, the plane shape of the metal plate is bent at a substantially central portion in the length direction so that the side surface has a U-shape. A U-shaped gap is provided, and a U-shaped gap is formed along the U-shaped opening so that the tops face each other and become narrower at a position closer to the opening than the center of the facing surface. Using a wall surface material connector (I) in which a U-shaped bent portion is provided and an opening interval of the U-shaped gap portion is larger than that of the other facing surface, After the upper end portion is fitted into the gap of the wall material connector (I), the wall material connector (A) is slid to the other metal wall material side to be connected, and the upper ends of the two metal wall materials To connect the upper end of the metal wall material, and then connect the long metal rod in the length direction. A U-shaped bent portion is provided by bending at the central portion, and the side shape of the two long parallel metal rod portions is U-shaped at a portion slightly closer to the tip side from the central portion in the length direction. A U-shaped bent portion is provided oppositely to form a hook-and-hook shape, and an opening portion in which the distal end side of the U-shaped bent portion is slightly bent outward and expanded while maintaining the parallelism of the two metal rod portions; The wall surface material coupler (II) is used, and the opening on the tip side of the U-shaped bent portion of the wall surface material coupler (II) is connected to the longitudinal strands or sides of the two metal wall surface materials (A). After protruding from the lower back side of the horizontal strand etc. to the front side with the metal rod at the end in between, the horizontal strand etc. is fitted to the U-shaped bent part and the tip of the two metal rod parts is metal By placing it on the lower back side of the horizontal strand of the wall material (A), the gold Characterized by connecting the elevation part of manufacturing wall material, method of connecting the wall material. Metal wall material (A) is a plane structure of strands diamond or hexagonal shape is the mesh shape, the side shape is a metal wall material made of expanded metal, which is an L-shaped, according to claim 1 Method of connecting wall materials. The metal wall material (A) is arranged in a grid pattern on a plurality of other metal round bars at right angles to the plurality of metal round bars, and the intersecting portions are welded to form an L-shaped side surface. The method for connecting wall materials according to claim 1, wherein the wall materials are metal lattice wall materials.

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