JPH09228372A - Banking reinforcing material and its connecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the connecting strength of banking reinforcing materials by providing a weft strand clearance part a specified number of times the weft strand clearance of the mesh structure of the banking reinforcing material in one or more longitudinal positions, and winding a connecting bar into warp strands. SOLUTION: A weft strand clearance 1.1-100 times the weft strand clearance of the general mesh structure of a banking reinforcing material 7 is provided in the longitudinal direction of the reinforcing material. When mesh grids are mutually connected, they are superposed in such a manner that the end parts having the extended weft strand clearance are mutually reversed. Two warp strands 14 are held by finger tips and twisted several times, and a connecting bar 13 is inserted to the center part. The warp strands 14 of the whole width are treated from the next one in the same manner, whereby the banking reinforcing materials 7 are mutually connected with a high connecting strength in a short time, and the strength in the warp strand 14 direction of the banking reinforcing material is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embankment reinforcement material in which mesh grids having a mesh structure produced by various manufacturing methods are strongly connected for connection or reinforcement, and a connection method thereof.

[0002]

2. Description of the Related Art Conventionally, a mesh grid used for reinforcing embankments, a so-called embankment reinforcement connecting method, is shown in FIG.
The connection end pieces 22 and 23 are folded back by an appropriate length so as to wrap the metal rods 24 and 25 by the connection pieces 22 and 23 of 21.
Perforated metal plate 2 by aligning the upper and lower parts of the overlapping part
There is a method of connection using 8, bolts 26, nuts 27 and ropes 29. However, this method uses a lot of materials such as the perforated metal plate 28, the bolts 26, the nuts 27, the metal rods 24 and 25, and the ropes 29, so that the cost is high, the connection time is long, and a higher connection strength is required. When trying to obtain, there was a problem that many accessory parts were required.

Further, as shown in FIGS. 8 and 9, a plurality of points are arranged at predetermined intervals in the length direction of the mesh grid 30.
The connection weft strand densely arranged portion 34, in which the weft strands 32 are arranged by a predetermined length L at a disposition density of 1.5 times or more the disposition density of the weft strands 32 of the mesh structure part 33, constitutes the whole. Using a mesh grid in which a synthetic resin is impregnated and solidified, the connecting weft strand multi-density arranging portions 34 of the mesh grid are overlapped, the front and rear meshes are vertically aligned, and the rope 42 or the metal is formed at appropriate intervals. A method for inserting and connecting a rod or the like has been proposed (Japanese Patent Laid-Open No. 7-1).
27065).

However, this method has the merit that the connecting time is shortened and the material cost is also small, but in the resin grid, the connecting portion is formed when a considerable tension is applied to the portion of the insertion hole which is in contact with the metal rod. It has the drawback of tearing. Further, a grid made of a woven or knitted fabric has a drawback that although it exhibits a considerable connection strength, it cannot obtain a connection strength close to the breaking strength held by the warp strand. Furthermore, this method is intended to prevent the stress from being propagated in the next weft strand 32 even if the first weft strand 32 is displaced by increasing the number of weft strands, and as a result, to make it difficult to break. 31
However, it has the drawback that no higher tensile strength is applied directly to it and a higher bonding strength cannot be obtained. In addition, 35 and 36 are ear tissue parts of a mesh grid, 37 and 38 are connected mesh grids, 39 and 40 are connected mesh grid end parts, 4
1 is a mesh hole.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the drawbacks of the conventional method for connecting embankment reinforcements and to provide a embankment reinforcement having a strong connection and a method for connecting embankment reinforcements.

[0006]

The present invention adopts the following means in order to solve the above problems. That is, in the embankment reinforcement of the mesh structure, the present invention has a weft strand gap (B) which is 1.1 to 100 times as large as the weft strand gap (A) of the ordinary mesh structure in the embankment reinforcement of the ordinary mesh structure. The embankment reinforcing material is characterized in that the reinforcing material is provided at one or more locations in the length direction of the reinforcing material, and a connecting tool is provided in the weft strand gap (B) for connection.
Further, the present invention relates to a method for connecting embankment reinforcements having a mesh structure, wherein a part of the embankment reinforcement in the length direction is 1.1 to 100 times as large as the weft strand gap (A) of the ordinary mesh structure. A method for connecting embankment reinforcements, characterized in that a gap (B) is provided, and the weft strand gap (B) provided in the same manner as other embankment reinforcements is connected using a connecting tool.

Hereinafter, the present invention will be described in detail. Figures 1 and 2
2 is a plan view of a mesh grid used as an embankment reinforcing material, and in FIG. 1, the gap between the weft strands 1 and 1 of the wide mesh portion 3 is equal to that of the weft strands 1 and 1 of the normal mesh portion 2. The relationship is three times as large as the gap, and two positions are shown in FIG. 4 is an ear tissue part of the mesh grid. In FIG. 2, four wide mesh parts 3 are shown. The weft strand gap B is 1.1 to 100 times the weft strand gap A. If it is less than 1.1 times, it is difficult to insert the connecting tool, and if it is thin to facilitate insertion, the strength of the connecting portion is lowered, which is not preferable. On the other hand, 1
If it exceeds 00 times, the gap B is too large and the distance of the part without the weft strands of the mesh grid itself becomes long, and the form is apt to become unstable. Moreover, in manufacturing, the width and width of the mesh grid may be increased during the process. Occurs. More preferably, the weft strand gap B is a normal mesh portion gap A.
1.3 to 10 times is preferable. The weft strand gap may be provided over the entire width or may be provided partially.
That is, if a part of the number of warped strands arranged is omitted at regular intervals, a slightly larger gap (insertion hole) can be formed at a place where warped strands are omitted, but this is also included in the present invention.

If the connecting member is rod-shaped, it is made of metal or FR.
Composite material such as P (fiber reinforced plastic), GFRP (glass fiber reinforced plastic), CFRP (carbon fiber reinforced plastic) may be used, and the cross section may be round cross section, square cross section, elliptical cross section, solid or hollow. good.
These rod-shaped ones may have slit-shaped notches or the like over a part or the whole width, such as a combination of solid rod-shaped ones and hollow rod-shaped ones, hollow rod-shaped ones and slit-shaped notches one It may be combined with the one with.

A coil-shaped connecting member other than the rod-shaped member may be used in combination with the above-mentioned rod-shaped member. Fixing jigs such as U bolts and nuts may be used together, and the combination is free. However, the present invention describes using a weft strand gap and a rod shape or a jig having a similar function. A strong connection force is obtained by the effect of tightening the warp strand itself of the mesh grid by utilizing the force of earth pressure applied when laid in the soil. It also includes twisting the warp strands of the insertion hole generated by the weft strand gap and inserting the connecting tool. In this case, the effect of significantly increasing the frictional force between the warp strands caused by twisting is evoked, and this produces a high connection strength by combining the connecting tools. These are also possible with the insertion holes. The surface of these connecting tools may be subjected to uneven processing as a slip stopper. In addition, the connection includes both the connection between one reinforcing member and the other reinforcing member or the connection by itself. The weft strand arrangement interval of the invention is one place or two places with a fixed length.
It is not particularly difficult to provide more than one place, and in the case of a grid made of a resin plate, it is sufficient to make a slit longer than other slits at the time of slits before stretching (after stretching, it becomes a vertical length mesh) at the time of manufacturing, and a grid made of woven or knitted fabric Then, the timing for inserting the weft thread should be changed accordingly. The same applies to other grids. However, if the distance is too long, it will be difficult to keep the width in manufacturing.
Depending on the mesh size, up to about 1 m is the limit range for maintaining quality.

[0010]

FIG. 3 is a perspective view in which the mesh grid shown in FIG. 1 is connected to a concrete wall 8, and a metallic anchor 6 having a ring-shaped head is installed on the concrete layer 8 at appropriate intervals. . The weft strand is pulled out at the left end of the embankment reinforcement 7 to form a gap, three connecting rods 4 are inserted using the gap and the ring portion of the anchor, and the U-bolt 5 and the nut 10 are connected, and the warp strand Reference numeral 14 denotes a structure in which the connecting rods 4 are respectively wound.

FIG. 4 shows an expanded metal 11 and a mesh grid 7 which is a reinforcing material connected by a coil-shaped metal fitting 12 and a connecting rod 4. When connecting, the coil-shaped metal fitting is inserted while rotating. is there.

FIG. 5 shows an example in which mesh grids, which are reinforcements, are connected to each other. The ends of the type shown in FIG. Hold two of them 14 at the fingertips, twist them one to several times, insert the connecting rod 13 in the central part, and similarly treat the full width warp strands 14 from the next.

FIG. 6 also shows an example in which mesh grids are connected to each other. A metal rod 19 having a small diameter wound with the mesh grid is inserted into a thick hollow pipe 18 having slits in the width direction from the end. Prepare two sets of things,
The hollow pipe 18 is fastened with bolts 16, nuts 15 and a fastening plate 17. 3 to 6
In some of the methods, the connecting rod rotates when tensile tension begins to work, so when winding the mesh grid around the connecting rod, divide the mesh grid into two equal parts in the width direction to prevent rotation and reverse each other. It can be solved by getting involved.

[0014]

【Example】

Examples 1 to 4 and Conventional Examples 1 to 2 Using a sample having a length of 20 cm and a width of 20 cm of a mesh grid having a breaking strength of 135 kg of one warped strand (20 cm width is 12 warped strands) and FIG.
The strength of the connecting part connected with the connecting tool of ~ 6, the tensile tester UCT-25T of ORIENTEC
It was measured using Tensilon and is shown in Table 1. Note that, for comparison, the same measurements were performed for those shown in FIGS.

[0015]

[Table 1]

The strong contribution rate in Table 1 is obtained by the following equation. Strength contribution rate (%) = [average breaking strength / (breaking strength of one warped strand × 12)] × 100

From Table 1, the following was confirmed. The strength contribution rate is a little different from 100% when the tensile strength is pulled by a tensile tester, the 12 war strands within 20 cm do not always receive the uniform tension. It is pulled into the shape of, and then pulled one after another, and when it breaks, it does not break all at once, but rather breaks from the early pulled warp strands. This is because the grid itself has a considerable hardness, and 12 pieces cannot be evenly attached to the chuck part of the tensile tester. In the conventional method of FIG. 7, the strong contribution rate is 60.
Although it was ˜65%, it took 30 minutes to connect the mesh grids having a width of 2.1 m by two persons because of a troublesome connection time. Further, in the method of FIG. 9, the connection time between mesh grids was as short as 3 minutes for two people, but the strength contribution rate was 55% at best. On the other hand, FIG.
In the method of the present invention of Nos. 4 and 6, two persons took 10 to 15 minutes, but the strong contribution rate was as high as 70%, and in the method of the present invention of FIG. 5, two persons took 5 minutes, and the strong contribution rate was It was a very high value of 86.9%.

[0018]

The embankment reinforcing material of the present invention is a embankment reinforcing material having a high connection strength, and the method of the present invention is to connect embankment reinforcing materials with a high connection strength for connection in a short time or to embankment reinforcement. This has the effect of increasing the strength in the warp strand direction inside the material.

[Brief description of drawings]

FIG. 1 is a plan view of a mesh grid.

FIG. 2 is a plan view of another example of the mesh grid.

FIG. 3 is a perspective view in which a mesh grid is connected to a concrete wall.

FIG. 4 is a perspective view in which the expanded metal and the mesh grid are connected by another connecting tool.

FIG. 5 is a perspective view in which mesh grids are connected to each other by another connecting tool.

FIG. 6 is a perspective view in which mesh grids are connected to each other by another connecting tool.

FIG. 7 is a sectional view of a conventional connecting portion.

FIG. 8 is a plan view of a conventional mesh grid.

FIG. 9 is a plan view of a connecting portion of a conventional mesh grid.

[Explanation of symbols]

 1 Weft Strand 2 Normal Mesh Part 3 Wide Mesh Part 3'Mesh Grid Ear Tissue Part 4 Connecting Rod 6 Metal Anchor 7 Embankment Reinforcement A Normal Mesh Structure Weft Strand Gap B Weft Strand Gap

Claims (6)

[Claims] 1. The embankment reinforcing material having a mesh structure, wherein the weft strand gap (A) of the ordinary mesh structure is 1.1 to 1.
A embankment reinforcement material comprising 100 times as many weft strand gaps (B) provided in one or more locations in the longitudinal direction of the reinforcing material, and connecting means provided in the weft strand gaps (B). . 2. The embankment reinforcement material according to claim 1, wherein one or several connecting rods are wound as warp strands as a connecting tool. 3. The embankment reinforcement material according to claim 1, which is a pipe with a slit in which a metal rod is housed as a connecting tool. 4. A method for connecting embankment reinforcements having a mesh structure, wherein a part of the embankment reinforcement in the longitudinal direction is 1.1 to 100 times as large as the weft strand gap (A) of the ordinary mesh structure weft strand gap. A method for connecting embankment reinforcements, characterized in that (B) is provided and the weft strand gaps (B) provided in the same manner as other embankment reinforcements are connected using a connecting tool. 5. The method for connecting embankment reinforcements according to claim 4, wherein one to several connecting rods are wound as a connecting tool by means of warp strands and connected. 6. The method for connecting embankment reinforcements according to claim 4, wherein a pipe with a slit in which a metal rod is housed is used as the connecting tool.