Bag body for civil engineering work, structure for civil engineering work, and manufacturing method of structure for civil engineering work

Abstract

To provide a bag body for a civil engineering work, a structure for a civil engineering work, and a manufacturing method of a structure for a civil engineering work which have both a shape retaining function when hoisted and a shape retaining function when installed.SOLUTION: A bag body 1 for a civil engineering work comprises: a bag main body 10 having a storage portion 11 consisting of a bottom portion 11a and side portions 11b, and a lid portion 12; a lifting belt 20 extending upward from the center of the bottom portion 11a; and a plurality of restraining belts 30 extending upward from an outside of the side portions 11b. A length of the restraining belts 30 is long enough to restrain an outer periphery of the bag main body 10 by a belt portions 31 when it is lifted. A structure A for a civil engineering work comprises a bag body 1 for a civil engineering work and a filling material B filled in the storage portion 11. A manufacturing method of a structure for a civil engineering work comprises a filling step S1, a connecting step S2, and a restraining step S3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a bag for civil engineering work, a structure for civil engineering work, and a method for manufacturing a structure for civil engineering work, and more particularly to a bag for civil engineering work, a structure for civil engineering work, and a method for manufacturing a structure for civil engineering work that have both a shape retention function during lifting and a shape retention function during installation.

Background Art

[0002] In civil engineering applications such as temporary revetment work for levees, earth retaining work for slopes, rockfall protection work, and countermeasures for soft ground, a civil engineering structure formed by filling a bag with a filling material is used. The civil engineering structure is manufactured at the construction site by filling the inside of the bag with earth and sand and fastening the bag mouth, and is lifted by a crane or a backhoe and placed at the installation location. Since civil engineering structures are stacked and arranged in multiple units, if the outer shape collapses during installation, it will have an adverse effect on the overall shape of the earth retaining work or the like. Therefore, the shape retention performance during installation is important. In addition, when lifting, the bottom surface may bulge or the side surface may deform due to the load of the filling material. If there is deformation during lifting, it will be difficult to arrange them closely, and the overall appearance will deteriorate. Therefore, shape retention performance during lifting is also required. Patent Documents 1 and 2 disclose a rectangular parallelepiped bag whose upper part can be opened and closed, and a suspension body that connects the center of the bottom surface of the rectangular parallelepiped bag and a plurality of points on the diagonal line and extends upward. According to the civil engineering structure manufactured from this bag, it is said that when lifting, the filling material is compressed in the central direction and solidifies into a rectangular parallelepiped shape, so that the shape can be stabilized during lifting.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] The prior art has the following problems. <1> When lifting, a compressive force acts on the filling material in the substantially triangular portion in side view extending from the bottom surface 12 to the fixing point 20a of the suspended body (FIG. 5(B) of Patent Document 1), but no restraint acts on the upper outer portion. For this reason, it is impossible to suppress the bulging deformation of the side surface due to lifting. <2> Since it is a structure that restrains the filling material from the inside, after installation, the load in the filling material is dispersed and the restraint is released. For this reason, it is impossible to maintain the shape during lifting after installation.

[0005] An object of the present invention is to provide a bag body for civil engineering work for solving the above problems of the prior art.

Means for Solving the Problems

[0006] The bag body for civil engineering work of the present invention includes a bag main body having a storage portion composed of a bottom portion and a side portion, and a lid portion, a lifting belt extending upward from the center of the upper surface of the bottom portion, and a plurality of restraint belts extending upward from the outside of the side portion. The restraint belt has a belt portion connected to the outside of the side portion at a part, and a loop portion provided at the upper portion of the belt portion. The length of the restraint belt is such that when the storage portion is filled with a filling material and the upper portion is covered with the lid portion, and the lifting belt is communicated and lifted in the loop portions of the plurality of restraint belts, the outer periphery of the bag main body can be restrained by the belt portion.

[0007] In the bag body for civil engineering work of the present invention, a part of the restraint belt may be connected to the bottom surface of the bottom portion.

[0008] The bag body for civil engineering work of the present invention may have an outer shape substantially in the shape of a rectangular parallelepiped, in which the bag main body includes a storage portion composed of a rectangular bottom portion and four side portions, and a rectangular lid portion.

[0009] The bag body for civil engineering work of the present invention is provided with four restraint belts, and a part of the belt portions of the four restraint belts may be sewn along the height direction on the outside of the four side portions respectively.

[0010] The bag body for civil engineering work of the present invention may be provided with a belt hole for inserting a lifting belt at the center of the lid portion.

[0011] The bag body for civil engineering work of the present invention may be provided with a lid portion including two inner lids covering the opening of the accommodating portion from both sides and one outer lid covering the surfaces of the two inner lids.

[0012] The civil engineering structure of the present invention includes a bag body for civil engineering work and a filling material filled in the accommodating portion, and is characterized in that the upper portion of the filling material is covered with a lid portion, and a lifting belt is communicated within the loop portions of a plurality of restraint belts.

[0013] The manufacturing method of the civil engineering structure of the present invention includes a filling step of filling the accommodating portion with a filling material and covering the upper portion with a lid portion, a connecting step of communicating a lifting belt within the loop portions of a plurality of restraint belts, and a restraining step of restraining the bag body together with the filling material from the outside by a plurality of restraint belts by lifting the bag body with the lifting belt.

Effect of the Invention

[0014] The bag body for civil engineering work, the civil engineering structure, and the manufacturing method of the civil engineering structure of the present invention have at least one of the following effects due to the above configuration. <1> Shape retention function during lifting Since it is a structure that restrains the bag body from the outer periphery by the restraint belts fixed to the side portions of the bag body, it is possible to effectively suppress the bulging to the outside of the bottom portion and the side portions during lifting. <2> Shape retention function during installation Since the loop portions of the restraint belts are bound to the lifting belt by lifting and the restraint is not released even after installation, it is possible to prevent the outer shape from collapsing after installation. <3> Self-restraint function By simply cutting the ground with the hanging means, the outer periphery of the bag body can be automatically restrained by the restraint belt using the load of the internal filling material. Also, since the bag body can be restrained simultaneously with the hoisting into the installation location, the construction efficiency is extremely high. <4>Improvement in the finished shape By maintaining the three-dimensional shape of the individual civil engineering structure, the finished shape of the entire structure such as the earth retaining work can be improved.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4A

Figure 4B

Figure 5A

Figure 5B

Figure 6A

Figure 6B

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0016] Hereinafter, with reference to the drawings, the civil engineering bag, the civil engineering structure, and the manufacturing method of the civil engineering structure of the present invention will be described in detail.

Examples

[0017] [Civil engineering bag] <1>Civil engineering bag (Figure 1) The civil engineering bag 1 is a bag for manufacturing the civil engineering structure A. The bag body 1 for civil engineering work includes at least a bag main body 10, a lifting belt 20, and a plurality of restraint belts 30. The lifting belt 20 extends upward from the upper surface of the bottom 11a of the bag main body 10. The restraint belt 30 extends upward from the outside of the side portion 11b of the bag main body 10. In this example, the bag main body 10 has four side portions 11b, and a total of four restraint belts 30 are connected to the outside of each side portion 11b, one for each.

[0018] <2>Bag main body (Figure 2) The bag main body 10 is a member for filling the inner packing material B. The bag main body 10 has a storage portion 11 composed of a bottom 11a and side portions 11b, and a lid portion 12 that covers the opening of the storage portion 11. In this example, the bag main body 10 has a substantially rectangular parallelepiped outer shape, the storage portion 11 has a rectangular bottom 11a and four side portions 11b, and the lid portion 12 has a rectangle corresponding to the bottom 11a. In this example, as the material of the bag main body 10, a polypropylene sheet kneaded with carbon black is adopted. However, the material of the bag main body 10 is not limited to this, and a polyethylene sheet, a polyester sheet, or other synthetic resin fiber sheets may be adopted as long as they have a predetermined rigidity and weather resistance.

[0019] <2.1>Lid portion The lid portion 12 is a member that covers the opening of the storage portion 11. In this example, as the lid portion 12, a combination of two inner lids 12a that cover the opening of the storage portion 11 from both sides in the width direction and one outer lid 12b that covers the surfaces of the two inner lids 12a is adopted. Specifically, inner lids 12a having a length of about half of the opening width are provided on both sides of the opening of the storage portion 11. One or a plurality of closing strings (not shown) are attached to the end edges of the inner lids 12a for closing. Alternatively, a pair of hook-and-loop fasteners may be attached to the end edges of the inner lids 12a for closing. An outer lid 12b having substantially the same shape as the opening is provided on one side of the opening of the storage portion 11 that is orthogonal to the two inner lids 12a. In this example, a belt hole 13 through which the lifting belt 20 is inserted is provided at the center of the outer lid 12b. Note that the structure of the lid portion 12 is not limited to the above. For example, it may have a structure with only the outer lid 12b without providing the inner lid 12a. Also, the outer lid 12b may have a double-opening structure consisting of two outer lids 12b, similar to the inner lid 12a.

[0020] <3>Hoisting Belt (Fig. 1) The hoisting belt 20 is a belt-like body for hoisting the bag body 10. The hoisting belt 20 includes a belt portion whose lower end is connected to the center of the bottom 11a of the accommodating portion 11, and a loop portion provided at the upper end of the belt portion. In this example, a polypropylene belt is adopted as the hoisting belt 20. However, the material of the hoisting belt 20 is not limited to this, and other synthetic resin fiber belts may be adopted.

[0021] <4>Restraining Belt (Fig. 1) The restraining belt 30 is a belt-like body for restraining the bag body 10 from the outside. The restraining belt 30 includes a belt portion 31 whose part is connected to the outside of the side portion 11b of the accommodating portion 11, and a loop portion 32 provided at the upper part of the belt portion 31. In this example, four polypropylene belts are adopted as the restraining belt 30, and a part of the belt portion 31 of each restraining belt 30 is sewn and connected along the height direction to the outside of the side portion 11b of the accommodating portion 11. Specifically, for example, two restraining belts 30 are used by providing loop portions 32 at both ends of a long belt portion 31 and connecting them, and the center of the belt portion 31 is passed through the bottom of the bag body 10 and sewn to the bottom 11a and the side portion 11b. By doing this in two directions orthogonal to the bag body 10, four restraining belts 30 are provided. However, the material and structure of the restraining belt 30 are not limited to this. The length of the restraining belt 30 will be described later.

[0022] <5>Structures for Civil Engineering Works (Fig. 3) The structure A for civil engineering works is a structure used for civil engineering applications such as temporary revetment works for dikes, earth retaining works for slopes, and rockfall protection works. The civil engineering structure A is formed by filling the filling part 11 of the civil engineering bag 1 with the filling material B. Specifically, the filling material B is filled into the filling part 11 of the bag body 10, the upper part is covered with the lid part 12, and the lifting belt 20 is communicated in the loop part 32 of the plurality of restraint belts 30, and the outer periphery of the bag body 10 is restrained by the restraint belt 30 to construct. In this example, earth and sand are adopted as the filling material B. However, it is not limited to this, and crushed stones, boulders, concrete debris, brick pieces, incineration ash, etc. can be adopted. The civil engineering structure A can be lifted by a heavy machine such as a crane or a backhoe and installed at an arbitrary location. Further, a plurality of civil engineering structures A can be stacked in multiple stages and used as an integral structure.

[0023] <6> Manufacturing method of civil engineering structure The civil engineering structure A can be manufactured by a method including a filling step S1, a connecting step S2, and a restraining step S3.

[0024] <6.1> Filling step (Figs. 4A, 4B) The filling step S1 is a step of filling the filling material B into the bag body 10. The filling step S1 is specifically implemented by, for example, the following method. The civil engineering bag 1 with the lid part 12 open is placed in a formwork corresponding to the outer shape of the filling part 11. Note that without using a formwork, the ground may be simply excavated into a concave shape corresponding to the outer shape of the filling part 11, and the civil engineering bag 1 may be placed inside. In order to prevent the lifting belt 20 from being buried in the filling material B, a single pipe or the like is passed through the loop part of the lifting belt 20 and suspended from above the filling part 11, and the filling material B is filled into the filling part 11 using a backhoe or a scoop (Fig. 4A). After the filling of the filling material B, the two inner lids 12a are closed and connected with a closing string (Fig. 4B), and the surface of the inner lid 12a is covered with the outer lid 12b. At this time, the lifting belt 20 is pulled out to the outside of the outer lid 12b through the belt hole 13.

[0025] <6.2> Connecting step (Figs. 5A, 5B) The connecting step S2 is a step of connecting the restraining belt 30 to the lifting belt 20. The connecting step S2 is specifically implemented, for example, by the following method. Arrange the four restraining belts 30 toward the center of the outer lid 12b, and communicate the lifting belt 20 into the four loop portions 32. Specifically, for example, first, communicate the lifting belt 20 in an S shape into the loop portions 32 of two opposing restraining belts 30 (Fig. 5A). Subsequently, rotate the angle of the lifting belt 20 by approximately 90 degrees in plan view, and communicate it in an S shape into the loop portions 32 of the remaining two restraining belts 30 (Fig. 5B). Note that the communication method of the lifting belt 20 is not limited to this. For example, it may be communicated clockwise with respect to the four restraining belts 30.

[0026] <6.3> Restraining step (Figs. 6A, 6B) The restraining step S3 is a step of restraining the bag body 10 with the restraining belt 30. The restraining step S3 is specifically implemented, for example, by the following method. Hang the hanging means C on the loop portion of the lifting belt 20. When the civil engineering bag body 1 is cut by a heavy machine (Fig. 6A), the lifting belt 20 that was bent in an S shape is stretched straight, and the belt-shaped lifting belt 20 is tightly squeezed from multiple directions into the loop portion 32 of the restraining belt 30. As a result, the lifting belt 20 and the multiple loop portions 32 are bound by friction (Fig. 6B). Thus, the civil engineering structure A is completed.

[0027] <7> Installation of the civil engineering structure (Fig. 7) The civil engineering structure A can be lifted by a heavy machine such as a crane or a backhoe by hanging the hanging means C on the loop portion of the lifting belt 20. During lifting, the bottom 11a of the bag body 10 tends to hang downward and deform outward (downward and laterally) around the connecting portion with the lifting belt 20. On the other hand, four restraint belts 30 connected to the lifting belt 20 lift the bottom 11a and the side 11b of the bag body 10 from the outside and restrain them in the central direction (Fig. 7), thereby suppressing the sagging of the outside of the bottom 11a and the deformation of the civil engineering structure A (self-restraint function). As a result, the outer shape of the bag body 10 can be maintained, and the shape of the civil engineering structure A can be improved. After the civil engineering structure A is installed, the tip of the lifting belt 20 protruding above the loop portion 32 can be folded back and sandwiched between the upper surface of the lid portion 12 and the gap of the restraint belt 30, or tied to the belt portion 31 of the restraint belt 30 with a binding string (not shown) for fixation.

[0028] <8>Length of the restraint belt In order for the civil engineering structure A to exhibit the self-restraint function, the restraint belt 30 should not be too long and needs to be within a predetermined length range. Specifically, the length of the restraint belt 30 should be such that in the state where the civil engineering structure A filled with the filling material B is lifted, the belt portion 31 can support the bulge of the bag body 10 from the outside. Specifically, for example, the length of the portion of the restraint belt 30 extending upward from the side 11b of the bag body 10 can be equal to the distance from the side edge to the center on the lid portion 12. Thereby, when the central lifting belt 20 is lifted by the crane of the crane, due to the self-weight of the filling material B, the restraint belt 30 restrains the filling material B from the outside, so that the shape of the civil engineering structure A can be maintained.

Example

[0029] [Other shapes of the bag body] The outer shape of the bag body 10 is not limited to a substantially rectangular parallelepiped shape. The outer shape of the bag body 10 may be, for example, a substantially cylindrical shape (Fig. 8), a substantially triangular prism shape, a substantially hexagonal prism shape, or other three-dimensional shapes.

Explanation of reference numerals

[0030] 1 Civil engineering bag 10 Bag body 11 Accommodation part Bottom of 11a Side of 11b Cover part 12 Inner cover 12a Outer cover 12b Belt hole 13 Lifting belt 20 Restraining belt 30 Belt part 31 Loop part 32 Structures for civil engineering works A Inner filling material B Lifting means C Filling process S1 Connecting process S2 Restraining process S3

Claims

1. A bag body having a storage part consisting of a bottom part and side parts, and a lid part; A lifting belt extending upward from the center of the upper surface of the bottom part; A plurality of restraint belts extending upward from the outside of the side parts, and comprising: Each of the restraint belts has a belt part connected to the outside of the side part and a loop part provided at the upper part of the belt part; The length of the restraint belt is such that when the storage part is filled with a filling material and the upper part is covered with the lid part, and the lifting belt is connected and lifted through the loop parts of the plurality of restraint belts, the outer periphery of the bag body can be restrained by the belt part, which is characterized in that it is a bag body for civil engineering work. A bag body for civil engineering work.

2. Characterized in that a part of the restraint belt is connected to the bottom surface of the bottom part, The bag body for civil engineering work according to Claim 1.

3. Characterized in that the bag body comprises a storage part consisting of a rectangular bottom part and four side parts, and a rectangular lid part, and has a substantially rectangular parallelepiped shape on the outer surface, The bag body for civil engineering work according to Claim 1.

4. Comprising four of the restraint belts, Characterized in that a part of the belt parts of the four restraint belts are respectively sewn along the height direction to the outside of the four side parts, The bag body for civil engineering work according to Claim 3.

5. Characterized in that a belt hole for inserting the lifting belt is provided at the center of the lid part, The bag body for civil engineering work according to Claim 1.

6. The lid part is, Two inner lids covering the opening of the storage part from both sides, And one outer lid covering the surfaces of the two inner lids, which is characterized in that it is a bag body for civil engineering work according to any one of Claims 1 to 5. The bag body for civil engineering work according to any one of Claims 1 to 5.

7. The bag body for civil engineering work according to any one of Claims 1 to 5, and A filling material filled in the storage part, and comprising: The upper part of the filling material is covered with the lid part, Characterized in that the lifting belt is connected through the loop parts of the plurality of restraint belts, A structure for civil engineering work.

8. A method for manufacturing the structure for civil engineering work according to Claim 7, comprising: A filling step of filling the storage part with a filling material and covering the upper part with the lid part; A connecting step of connecting the lifting belt through the loop parts of the plurality of restraint belts; A restraining step of lifting the bag body with the lifting belt so that the bag body is restrained from the outside together with the filling material by the plurality of restraint belts, which is characterized in that it is a method for manufacturing a structure for civil engineering work. A method for manufacturing a structure for civil engineering work.

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