Fiber gabion

Abstract

To provide a fiber gabion capable of suppressing side bulging due to lateral pressure of a filling material and ensuring a regular rectangular finished shape.SOLUTION: A fiber gabion 1 of the present invention comprises a substantially box-shaped gabion body 10 made of knitted fabric, and a plurality of restraining bodies 20 stacked vertically within the gabion body 10. Each restraining body 20 is formed by filling a substantially box-shaped inner bag 21 with a filling material 22, the width and length of each restraining body 20 being substantially equal to the width and length of the gabion body 10, and the height of the stacked plurality of restraining bodies 20 being substantially equal to the height of the gabion body 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fiber futon cage, and particularly to a fiber futon cage capable of suppressing the side bulging due to the side pressure of the filling material and ensuring a neat rectangular shape.

Background Art

[0002] In bank protection work and slope reinforcement work in rivers and coasts, etc., a futon cage filled with filling material such as crushed stone inside the cage body is used. In recent years, for the purpose of corrosion prevention and weight reduction, etc., instead of the conventional iron wire futon cage, a fiber futon cage composed of a knitted fabric has become popular. Patent Document 1 discloses a fiber futon cage that suppresses the side bulging due to the internal pressure of the filling material by mutually restraining the opposing side surfaces with a restraining rope arranged inside the cage body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the conventional fiber futon cage is entirely made of a flexible knitted fabric, when the filling material is filled, the side surface bulges out and is easily deformed due to the internal pressure of the filling material. In particular, when a restraining rope is not used, there is a risk that the deformation becomes significant. Also, by repeatedly lifting and turning it before placing it at the construction position, the deformation accumulates, and the shape may collapse greatly at the final installation. When the shape of the futon cage is greatly deformed, not only does the formed shape deteriorate, but stacking becomes difficult and the construction accuracy decreases.

[0005] In addition, since the mesh size of the cage body is often designed to be about several tens of millimeters according to the size of the crushed stones, when using in-situ generated soil as the filling material, it is necessary to arrange an inner bag with a small mesh size inside the cage body and fill the in-situ generated soil into the inner bag. When arranging the inner bag inside the cage body, the inner bag becomes an obstacle and the restraint rope cannot be extended. For this reason, the restraint effect of the restraint rope does not work, resulting in protrusion on the side surface and deteriorating the shape of the fiber futon cage. Especially, since the earth and sand have higher fluidity than the crushed stones, the lateral pressure is large, and there is a risk that the protrusion becomes remarkable. On the other hand, in order to use the inner bag and the restraint rope in combination, it is necessary to cut the inner bag and pass the restraint rope through the cut for extension, but there is a risk that the earth and sand will leak out from the vicinity of the cut part. In addition, since the operator will cut the inner bag on site, there will be variations in the quality of the product.

[0006] An object of the present invention is to provide a fiber futon cage for solving at least one of the above problems.

Means for Solving the Problems

[0007] The fiber futon cage of the present invention includes a substantially box-shaped cage body made of a knitted fabric, and a plurality of restraint bodies vertically stacked and accommodated inside the cage body. The restraint body is formed by filling a filling material into a substantially box-shaped inner bag. The width and length of the restraint body are substantially equal to the width and length of the cage body, and the height of the plurality of restraint bodies stacked is substantially equal to the height of the cage body.

[0008] The fiber futon cage of the present invention may include a restraint rope connecting between two opposing side surfaces of the cage body, and the restraint rope may be sandwiched between two vertically adjacent restraint bodies.

[0009] The fiber futon cage of the present invention may accommodate two restraint bodies vertically stacked inside the cage body, and the restraint rope may be sandwiched between the two vertically stacked restraint bodies.

[0010] In the fiber-made futon cage of the present invention, both ends of the restraint rope may branch into a plurality of connecting wire materials, and the tips of the plurality of connecting wire materials may be connected to the side surface of the cage body.

[0011] In the fiber-made futon cage of the present invention, four side surfaces of the cage body may be respectively connected to the opposing side surfaces by a plurality of restraint ropes, and two intersecting restraint ropes may be joined at the intersection point.

Advantages of the Invention

[0012] The fiber-made futon cage of the present invention can disperse the internal pressure acting on the side surface of the cage body by dividing and restraining the stuffing material with a plurality of stacked inner bags, and can secure a neat rectangular shape without using a restraint rope. Thereby, the labor of stretching the restraint rope can be saved, and the working efficiency can be improved.

[0013] Also, when it is desired to further improve the shape, a restraint rope can also be used. In this case, the stuffing material is divided into a plurality of stages of restraint bodies, and the restraint rope is sandwiched between the upper and lower restraint bodies, so that the restraint rope can be stretched without cutting the inner bag. Thereby, by the cooperation of the restraint of the stuffing material by the inner bag and the restraint of the opposing side surfaces of the cage body by the restraint rope, the bulging of the side surface can be suppressed, and the shape can be further improved. Furthermore, since cutting work on the inner bag at the site becomes unnecessary, the working efficiency is improved and the uniformity of the product quality can be achieved.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0015] Hereinafter, the fiber futon cage of the present invention will be described in detail with reference to the drawings.

Example

[0016] [Fiber Futon Cage] <1> Overall Configuration (Fig. 1) The fiber futon cage 1 is a structure mainly used for civil engineering applications. The fiber futon cage 1 includes at least a cage body 10 and a plurality of restraint bodies 20 stacked vertically and accommodated therein. In this example, it further includes a restraint rope 30 connecting between two opposing side surfaces 13 of the cage body 10, and the fiber futon cage 1 is composed of a combination of one cage body 10, two restraint bodies 20, and one restraint rope 30. In Fig. 1, for the convenience of explanation, the lid surface 11 of the cage body 10 and the upper restraint body 20 are shown in a state of being cut in half. The width and length of the restraint body 20 are substantially equal to the width and length of the cage body 10. The height of the stacked restraint bodies 20 is substantially equal to the height of the cage body 10. In this example, the height of each restraint body 20 is set to half of the height of the cage body 10. The restraint rope 30 is arranged between two restraint bodies 20 stacked vertically. In this example, the restraint rope 30 is extended at a position half of the height of the cage body 10. The fiber futon cage 1 has a feature in that it has a structure capable of restraining the lateral pressure due to the load of the filling material 22 in cooperation with the cage body 10 and the restraint body 20.

[0017] <2> Cage Body (Fig. 2) The cage body 10 is a box-shaped body made of a knitted fabric. The cage body 10 has a substantially box-shaped configuration composed of a lid surface 11, a bottom surface 12, and four side surfaces 13, each made of a fiber knitted fabric. Specifically, for example, thick strands knitted in a loop shape are arranged vertically and used as the upper and lower sides of the side surface 13. The space between the upper side and the lower side is connected by a Raschel knitted fabric made of thin strands to form the side surface 13. A rectangular knitted fabric is connected within the loop of the upper side to form the lid surface 11, and a rectangular knitted fabric is connected within the loop of the lower side to form the bottom surface 12. In this example, a polyester fiber net is adopted as the knitted fabric constituting the cage body 10. However, the knitted fabric is not limited to the polyester fiber net, and it may be a polyethylene fiber net or other materials.

[0018] <3>Restraining body (Figure 3) The restraining body 20 is a structure that restrains the filling material 22 inside. The restraining body 20 includes at least an inner bag 21 and the filling material 22 filled inside the inner bag 21. The inner bag 21 has a substantially box-shaped outer shape corresponding to the outer shape of the cage body 10 and is provided with an openable lid piece 21a at the upper part. A sealing string (not shown) is attached to the lid piece 21a. In this example, as the inner bag 21, a polypropylene bag body that can be expanded in the width direction at the upper part is adopted. However, the material of the inner bag 21 is not limited to polypropylene, and polyester, polyethylene, nylon, vinylon, aramid fiber, etc. may be adopted. Also, the fiber can adopt multifilament, monofilament, flat yarn, etc. The fabric can adopt woven fabric, non-woven fabric, knitted fabric, etc. In this example, earth and sand (locally generated soil) are adopted as the filling material 22. However, the filling material 22 is not limited to earth and sand, and crushed stone, natural stone, concrete debris, asphalt debris, etc. can be adopted.

[0019] <4>Restraining rope (Figure 4) The restraining rope 30 is a component that connects between two opposing side surfaces of the cage body 10 and restrains each other. In this example, a polyester fiber rope is adopted as the restraining rope 30. However, it is not limited to this, and any other material may be used as long as it has sufficient tensile strength for restraining the side surface 13. In this example, the restraining rope 30 is composed of a single restraining wire 31 and a plurality of connecting wires 32 branched from both ends of the restraining wire 31. Here, the restraining wire 31 may be a single continuous wire, or may be formed by joining two wires at the center to form a single wire. In this example, the number of connecting wires 32 is three at each of both ends of the restraining wire 31, and both ends of the restraining rope 30 branch into a Y-shape in plan view. Note that the number of connecting wires 32 is not limited to three, and may be two or four or more. Or only the restraining wire 31 may be provided without the connecting wires 32. The tip of each connecting wire 32 is tied and connected to the strands on the side surface 13 of the cage body 10.

[0020] <5>Manufacture of the fiber futon cage The fiber futon cage 1 is manufactured, for example, by the following method. The cage body 10 with the lid surface 11 open is placed in a mold corresponding to the outer shape of the fiber futon cage 1. The mold may be a steel mold, or the ground may be simply excavated in the outer shape of the fiber futon cage 1, and the cage body 10 may be placed inside it to also serve as the mold. An inner bag 21 is placed inside the cage body 10, the inner bag 21 is filled with the stuffing material 22, the lid piece 21a is closed, and the lid piece 21a is sealed with a sealing string (manufacture of the lower restraining body 20). The restraining body 20 is roll-pressed from above using a rammer or the like. Due to the roll-pressing, the stuffing material 22 tends to bulge out laterally, but the inner bag 21 at half the height of the cage body 10 restrains the stuffing material 22 from the side, suppressing the bulge at the central part of the height of the cage body 10. Subsequently, the restraining rope 30 is extended inside the cage body 10. Specifically, the restraining rope 30 is placed on the restraining body 20 in the longitudinal direction of the cage body 10, and the tips of the respective connecting wires 32 are tied and connected to the strands of the two opposing side surfaces 13. It is desirable to connect the restraining rope 30 with a slightly tense feeling. The inner bag 21 of the upper restraining body 20 is placed on the lower restraining body 20 and the restraining rope 30, and the inner bag 21 is filled with the stuffing material 22. The lid piece 21a is closed and sealed with a sealing string (manufacture of the upper restraining body 20), and roll-pressing is performed from above. After compaction, the cover 11 is placed on the upper restraining body 20, and the side edge of the cover 11 and the upper edge of the side surface 13 are woven with a cover-closing rope to seal them together. This completes the fiber futon basket 1.

[0021] <6> Comparison with conventional technology (Fig. 5) The finished shapes of the fiber quilt basket 1 of the present invention (Example) and the fiber quilt basket of the prior art (Comparative Example) were compared. [Example] Basket body: Width 1,000mm x Length 2,000mm x Height 500mm Inner bag: Width 1,000mm x Length 2,000mm x Height 250mm x 2 bags Finished size: Width 1,050mm x Length 2,030mm x Height 555mm [Comparative Example] Basket body: Width 1,000mm x Length 2,000mm x Height 500mm Inner bag: Width 1,000mm x Length 2,000mm x Height 500mm Finished size: Width 1,110mm x Length 2,080mm x Height 520mm [Comparison of finished product] In the fiber futon basket of the comparative example, the sides of the basket body bulged out due to filling and rolling compaction of the filling material, and the center of the lid surface caved in, causing the shape to be significantly distorted. In contrast, the fiber futon basket of the example maintains a regular rectangular shape regardless of the filling and compaction of the fill material. This is thought to be due to the combination of the side restraint effect, in which the middle part of the sides of the basket body, which is the part that traditionally experiences the greatest deformation, is restrained by the restraining rope, and the fill material restraint effect, in which the upper and lower inner bags divide and restrain the fill material, effectively suppressing side bulging. [Example]

[0022] [Example without restraining rope] In the first embodiment, the opposing side surfaces 13 of the basket body 10 are restrained by the restraining ropes 30, but the restraining ropes 30 are not an essential component. In this example, although there is no side restraint effect by the restraint rope 30, by dividing and restraining the inner packing material 22 with the stacked inner bags 21, the internal pressure acting on the side surface 13 of the cage body 10 can be dispersed, and a neat rectangular shape can be ensured.

Example

[0023] [Example of intersecting restraint ropes] In Example 1, the restraint ropes 30 were arranged only between the two short-side side surfaces among the two opposing side surfaces 13 of the fiber futon cage 1. However, in this example, two restraint ropes 30 are intersected to connect the two short-side side surfaces and the two long-side side surfaces in two directions (Fig. 6). There is no limitation on the number of restraint ropes 30. For example, the side surfaces 13 on the short-side are connected by one restraint rope 30, and the side surfaces 13 on the long-side are connected by two restraint ropes 30. Also, knots are provided at the intersections of the restraint ropes 30 to connect them to each other. As a result, the plurality of intersecting restraint ropes 30 restrain each other in the orthogonal direction, improving the shape retention function of the entire fiber futon cage 1.

Example

[0024] [Example where the restraint body has three or more stages] In Example 1, the restraint body 20 was made into two upper and lower stages, but it is not limited to this. For example, the restraint body 20 may be made into three upper and lower stages, and the restraint ropes 30 may be extended between each stage. Or the restraint body 20 may be made into four upper and lower stages, and the restraint ropes may be extended only between the second and third stages. That is, it is not necessary to extend the restraint ropes 30 between all the restraint bodies 20 stacked vertically. It is sufficient to extend the restraint ropes 30 between at least two adjacent restraint bodies 20 stacked vertically.

Explanation of reference numerals

[0025] 1 Fiber futon cage 10 Cage body 11 Cover surface 12 Bottom surface 13 Side surface 20 Restraint body 21 Inner bag 21a Cover piece 22 Intermediate packing material 30 Restraining rope 31 Restraining wire 32 Connecting wire

Claims

1. A substantially box-shaped cage body made of a woven fabric, and a plurality of restraint bodies vertically stacked and accommodated in the cage body, wherein the restraint body is formed by filling a stuffing material into a substantially box-shaped inner bag, the width and length of the restraint body are substantially equal to the width and length of the cage body, and the height of the stacked plurality of restraint bodies is substantially equal to the height of the cage body, characterized in that it is a futon cage. Futon cage

2. Comprising a restraint rope connecting between two opposing side surfaces of the cage body, characterized in that the restraint rope is sandwiched between two vertically adjacent restraint bodies, The futon cage according to Claim 1.

3. Two of the restraint bodies are vertically stacked and accommodated in the cage body, characterized in that the restraint rope is sandwiched between the two vertically stacked restraint bodies, The fiber-made futon cage according to Claim 2.

4. Both ends of the restraint rope branch into a plurality of connecting wires, characterized in that the tips of the plurality of connecting wires are connected to the side surface of the cage body, The fiber-made futon cage according to Claim 2 or 3.

5. Characterized in that four side surfaces of the cage body are respectively connected to the opposing side surfaces by a plurality of the restraint ropes, and two intersecting restraint ropes are joined at the intersection point, The fiber-made futon cage according to Claim 2 or 3.

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