WO2018163303A1

WO2018163303A1 - Bag body for civil engineering work

Info

Publication number: WO2018163303A1
Application number: PCT/JP2017/009083
Authority: WO
Inventors: 村上　義則; 慎吾井坂
Original assignee: 前田工繊株式会社
Priority date: 2017-03-07
Filing date: 2017-03-07
Publication date: 2018-09-13
Also published as: JPWO2018163303A1; PH12018500643A1; JP6188184B1; PH12018500643B1

Abstract

[Problem] To provide a bag body for civil engineering work such that tearing of knitted fabric of the bag body is effectively prevented. [Solution] The bag body 20 has a storage part 22 for a filling material, a hoisting rope attachment part 24, and a surplus length part 26, and the vertical pitch of multiple vertically long mesh openings 25 formed in multiple stages in the hoisting rope attachment part is larger than vertical pitch of standard mesh openings 23 formed in the storage part 22.

Description

Civil engineering bag

The present invention relates to a civil engineering bag that can be used for various civil engineering work in the ocean or on land.

Referring to FIGS. 7 and 8, a civil engineering structure 90 constituted by filling a bag 91 for civil engineering 91 with a filling material 95 such as stone has a weight of 1 to 4 tons (patent) References 1-3).
The conventional civil engineering bag body 91 includes at least a mesh-structured bag body 92 and a suspension rope 93 attached near the opening of the bag body 92.
A fiber knitted fabric is used for the bag body 92, and the opening size of the mesh 96 is formed around 50 mm in order to restrict leakage of the filling material 95.
The suspension rope 93 is composed of a single rope material. After the bag body 92 is circulated while inserting one end of the rope material into a plurality of meshes, both ends of the rope material are connected to form an endless structure.
When the civil engineering structure 90 is moved to a predetermined location, the suspension rope 93 is pulled out from a plurality of meshes (for example, six locations) of the bag body 92, and the pulled-out loop portions 94 are grouped to have a crane function. It is lifted by a hook 96 or the like.

JP-A-11-131447 JP 2008-274698 A JP 2012-131532 A

The conventional civil engineering bag has the following several problems.
<1> FIG. 8A shows a form in which

adjacent loop portions

94a and 94b are pulled out through the mesh 96 of the bag body 92, and FIG. 8B shows a form in which the two

loop portions

94a and 94b are lifted. ing.
When the

loop portions

94a and 94b are lifted, the

meshes

96a and 96b anchored by the

loop portions

94a and 94b are pulled away from each other.
Since the openings of the

meshes

96a and 96b are formed with a small dimension of about 50 mm in consideration of leakage of the filling material 95, the distance that each of the

meshes

96a and 96b can be expanded is relatively short.
Therefore, there is a problem that part of the knitting yarns of the

meshes

96a and 96b is cut and the knitted fabric is torn.
<2> As one of the methods for preventing the tearing of the mesh 26, it is conceivable to increase the opening size of the mesh 96 of the entire mesh constituting the bag body 92. However, if the opening size of the mesh 96 is increased, the bag There arises a problem that the filling material 95 comes out through the mesh 96 of the main body 92.
<3> If there is a large difference in the pull-out intervals of the plurality of loop portions 94, when the bag body 92 is lifted, nonuniform tension is applied to the bag body 92 and the mesh 96 is easily torn.
<4> As another method for preventing the mesh 26 from being torn, there is a method of pulling the suspension rope 93 by skipping one or more meshes 96.
In this method, the number of meshes 96 (the number of meshes that pass through the rope material and the number of meshes that fly without passing through the rope material) must be accurately counted when the suspension rope 93 is attached. Not only does it take time and effort, it is easy to make mistakes in counting eyes.
<5> Furthermore, as another problem when the rope material is inserted by skipping the number of meshes 96, the drawing position of the suspension rope 93 is very difficult to understand.
There is a method of attaching a plurality of marking tapes to the knitted fabric in accordance with the pulling position of the suspension rope 93 in order to make the pulling position easy to see, but the manufacturing process of the bag body is increased.

The present invention has been made in view of the above points, and the purpose thereof is high in the effect of preventing tearing of the knitted fabric of the bag body, and the insertion work and the drawing work of the hanging rope can be performed easily and in a short time. The purpose is to provide civil engineering bags.

The present invention includes a mesh-shaped bag body capable of accommodating a filling material therein, a suspension rope attached at a position separated from the opening of the bag body, and a mouth attached in the vicinity of the opening of the bag body. A bag body for civil engineering work that suspends the bag body through a plurality of loop portions formed by pulling out a part of the suspension rope from a plurality of locations of the bag body, the plurality of bag bodies A portion for attaching a filling material having a reference mesh of the above and a portion for attaching a suspension rope, and attaching a suspension rope attachment portion integrally formed adjacent to the accommodation portion at the upper end of the accommodation portion, and a binding rope And a surplus length portion integrally formed adjacent to the suspension rope attachment portion at the upper end of the suspension rope attachment portion, and a plurality of vertically long meshes are formed in multiple stages on the suspension rope attachment portion. Formed on the hanging rope attachment Vertical pitch of the plurality of elongated mesh are in greater dimensional relationship than the vertical pitch of the reference network formed in the housing part has.
In another aspect of the present invention, the plurality of vertically formed meshes formed in multiple stages are a suspension rope insertion mesh formed adjacent to the uppermost reference mesh of the housing portion, and an upper rank of the suspension rope insertion mesh And an intermediate mesh formed adjacent to the suspension rope insertion mesh, and a relaxed mesh formed adjacent to the intermediate mesh and the lowest reference mesh of the extra length portion.
In another embodiment of the present invention, the developed shape of the reference mesh and the plurality of vertically long meshes is a polygon.
In another embodiment of the present invention, the developed shape of the reference mesh and the suspension rope insertion mesh of the bag body is a quadrangle or a hexagon.
In another embodiment of the present invention, the opening size of the reference mesh is a size that can regulate the escape of the filling material.
In another embodiment of the present invention, the bag body is formed of a Russell net formed by knitting knitting yarns in a single or double manner.

The present invention can obtain at least one of the following effects.
<1> Even if a tensile force directed in the tearing direction acts on the plurality of vertical meshes of the suspension rope attachment part through which the suspension rope is inserted, the plurality of vertical meshes expand horizontally so as to follow the displacement of the loop part. Therefore, the effect of preventing tearing of the knitted fabric of the bag body is remarkably enhanced.
<2> Since the amount of deformation of the vertical mesh of the suspension rope attachment portion formed on the bag body is larger than the reference mesh of the housing portion formed on the bag body, when passing the suspension rope through the mesh, troublesome skipping There is no need to apply marking tape to the position where the rope material is drawn.
For this reason, the suspension rope insertion work and the suspension rope drawing work can be performed easily and in a short time.

Front view of the civil engineering bag that constitutes the civil engineering structure Enlarged view of the knitted fabric of the civil engineering bag before lifting the civil engineering structure Enlarged view of the knitted fabric of the civil engineering bag when lifting the civil engineering structure It is explanatory drawing of the manufacturing method of the structure for civil engineering, (a) is explanatory drawing of the process of setting the bag for civil engineering work in a formwork, (b) is a filling material in the bag for civil engineering work. (C) is an explanatory diagram of the lifting process of the civil engineering structure, (d) is an explanatory diagram of the completed civil engineering structure A plan view of the civil engineering structure under construction as seen from the opening side Perspective view of the upper part of the civil engineering bag when lifting the civil engineering structure The perspective view of the structure for civil engineering construction which this invention presupposes BRIEF DESCRIPTION OF THE DRAWINGS It is an enlarged view of the knitted fabric of the bag for civil engineering construction which this invention presupposes, (a) is an enlarged view of the knitted fabric before a deformation | transformation, (b) is an enlarged view of the deformed knitted fabric.

Hereinafter, the present invention will be described with reference to the drawings.

<1> Civil Engineering Bag Body Referring to FIG. 1, the civil engineering bag body 10 (hereinafter referred to as “bag body 10”) is filled with a filling material 40 such as stones, and the civil engineering structure body. 60.
The civil engineering bag 10 includes a mesh-structured bag main body 20 filled with the filling material 40, an endless suspension rope 30 attached near the opening 21 of the bag main body 20, and an opening of the bag main body 20. 21 and a tying rope 32 attached at a position closer to 21.

<2> Bag Main Body The bag main body 20 is a bottomed bag body formed in a drawstring bag shape, and is a part to which the bag-shaped storage portion 22 that directly stores the filling material 40 and the suspension rope 30 are attached. A tubular suspension rope attachment portion 24 integrally formed adjacent to the accommodation portion 22 at the upper end of the portion 22 and a part for attaching the tying rope 32, and a suspension rope attachment portion at the upper end of the suspension rope attachment portion 24 24 and a cylindrical extra length portion 26 formed integrally adjacent to each other.
In this example, the overall shape of the bag body 20 is shown as a taper shape with a diameter reduced toward the bottom 28 closed from the opening 21, but a cylindrical shape formed with a uniform diameter from the opening 21 toward the bottom 22. It may be a form.
The accommodating part 22, the rope attachment part 24, and the extra length part 26 can be knitted as a continuous knitted fabric by a known knitting machine.
The volume of the bag body 20 is appropriately selected according to the intended use, but is practically in the range of 1 m ³ to 4 m ³ .

<2.1> Material of knitted fabric As the knitted fabric material of the bag body 20, for example, a knotless knitted fabric (for example, a Russell net, a knotless net, etc.) in which knitting yarns are knitted into a single layer or a double layer or more can be used.
As the knitting yarn of the knitted fabric, for example, synthetic fiber yarns such as polyester fiber yarns, polyamide fiber yarns and polyacrylic fiber yarns, or natural fiber yarns such as cotton yarn and hemp yarn can be used alone or in combination.
Practically, a Russell network in which synthetic fiber yarns such as polyethylene (400 d / 90 pieces, strength 140 kgf / 2 leg) are knitted double can be used.
The mesh of the bag body 20 is set to a dimension that does not leak the filling material 40.

<2.2> Mesh of Bag Body The bag body 20 has a hexagonal or rhombic mesh. In this example, a case where the mesh has a hexagonal shape will be described.
The overall mesh of the bag body 20 is not uniform, and the mesh of the suspension rope attachment portion 24 is formed vertically with respect to the mesh of the accommodating portion 22 and the extra length portion 26. Details will be described below.

<2.2.1> Mesh of storage portion and extra length portion The mesh of the bag body 20 will be described with reference to FIG.
The accommodating portion 22 and the surplus length portion 26 are configured by

reference meshes

23 and 27 each having a uniform hexagonal shape on all sides.
The reference mesh 23 of the housing portion 22 has a size that does not leak the filling material 40, and varies slightly depending on the size of the filling material 40, but the scale size of the

reference meshes

23 and 27 is preferably in the range of 25 to 50 mm in practice.
There is no special restriction on the reference mesh 27 of the extra length portion 26, and in this example, the reference mesh 27 is formed with the same mesh size as the reference mesh 23 of the accommodating portion 22.

<2.2.2> Mesh of Suspension Rope Attachment Portion The suspension rope attachment portion 24 is composed of a plurality of longitudinal meshes 25 having a hexagonal shape whose oblique sides are longer than the reference meshes 23 and 27.

The plurality of vertically long meshes 25 include a suspension rope insertion mesh 25a adjacent (space filling) to the uppermost reference mesh 23 of the accommodating portion 22, and an intermediate mesh 25b adjacent to the suspension rope insertion mesh 25a above the suspension rope insertion mesh 25a. The intermediate mesh 25b, the lowermost reference mesh 27 of the surplus length portion 26, and the adjacent relaxed mesh 25c are formed, and the plurality of meshes 25a to 25c are formed in multiple stages.

The lower oblique side of the hanging rope insertion mesh 25a and the upper oblique side of the reference mesh 23 are common.
Further, the upper oblique side of the hanging rope insertion mesh 25a and the lower oblique side of the intermediate mesh 25b are common, and the upper oblique side of the intermediate mesh 25b and the lower oblique side of the relaxation mesh 25c are also common.

The suspension rope insertion mesh 25a is a mesh for inserting the suspension rope 30. When the suspension rope 3032 is lifted, the upper slope of the suspension rope insertion mesh 25a is a reference mesh so that the suspension rope insertion mesh 25a can be deformed from a vertically long shape to a horizontally long shape. 23 and 27 are longer than one side.

The intermediate mesh 25b is a mesh provided to allow free deformation without restricting the deformation of the suspension rope insertion mesh 25a, and each oblique side of the intermediate mesh 25b is formed longer than one side of the reference meshes 23 and 27. Yes.

The relaxed mesh 25 c is a mesh for connecting the intermediate mesh 25 b to the lowest reference mesh 27 of the extra length portion 26, and the lower hypotenuse of the relaxed mesh 25 c is formed longer than one side of the reference meshes 23, 27.

<2.2.3> Relationship between Mesh Pitches The pitches in the vertical and horizontal directions of the reference meshes 23 and 27 and the longitudinal mesh 25 in a state where the knitted fabric is stretched will be described.
Regarding the horizontal pitch, the reference meshes 23 and 27 and the vertical mesh 25 are both in the same relationship.
Regarding the vertical pitch, the suspension rope insertion mesh 25 a has a larger dimensional relationship than the reference mesh 23.
That is, the vertical pitches of the reference meshes 23 and 27 are P ₁ and P ₅ , the vertical pitch of the suspension rope insertion mesh 25a is P ₂ , the vertical pitch of the intermediate mesh 25b is P ₃ , and the vertical pitch of the relaxation mesh 25c is P ₄ . In this case, the vertical pitches (P ₂ , P ₃ , P ₄ ) of the vertically long hanging rope insertion mesh 25a, the intermediate mesh 25b, and the relaxation mesh 25c are larger than the vertical pitches (P ₁ , P ₅ ) of the reference meshes 23, 27. Dimensional relationship.

In this example, although the vertical pitch P ₁ of the reference mesh 23 of the accommodating portion 22 and the vertical pitch P ₅ of the extra length portion 27 are both equal (P ₁ = P ₅ ), the extra length portion 27 is bound. since it may be a network capable of inserting the rope 32, the vertical pitch P ₅ that there is no particular limitation.

In other words, the dimensional relationship between the reference mesh 23 and the vertical mesh 25 may be such that the total side length of each

mesh

25a, 25b, 25c constituting the vertical mesh 25 is longer than the total side length of the reference mesh 23.

<3> Suspension rope The suspension rope 30 is a rope material used for lifting the structure 60 for civil engineering work, and is attached around the suspension rope attachment portion 24 near the opening 21 of the bag body 20.
More specifically, one end of the rope material of the suspension rope 30 is inserted into the suspension rope insertion mesh 25a shown in FIG. 2 without skipping, and the both ends are connected to form an endless structure.

<4> Tying Rope The tying rope 32 is a rope material for closing the opening 21 of the bag body 20, and is attached around the extra length portion 26.
In addition to tying both ends of the tying rope 32 to form an endless structure, the tying rope 32 may not have to tie both ends of the rope material.
The tying rope 32 is positioned higher than the suspension rope 30 (on the side closer to the opening 21) and is inserted through the reference mesh 27 and attached.
The reason for positioning the tying rope 32 above the suspension rope 30 is to close the opening 21 of the bag body 20 without being affected by the suspension rope 30 and to prevent the blocking portion of the opening 21 from protruding upward. This is to avoid it.

<5> Filling material For the filling material 40, for example, natural aggregates such as cobblestone, concrete glass, fired bodies of various wastes, and the like can be used.

[Manufacturing method for civil engineering structure]
Next, a method for manufacturing the civil engineering structure 60 using the bag 10 will be described with reference to FIG.

<1> Set of bag body (Fig. 4 (a))
A mold 50 having an inverted frustoconical shape (mortar shape) is prepared by opening up and down.
The bag body 20 is accommodated in the mold 50. The bag body 20 that has been widely opened is folded back and covered over the upper opening of the mold 50.

<2> Filling the filling material (FIG. 4B)
A predetermined amount of filling material 40 is put into the accommodating portion 22 of the bag body 20 using a heavy machine such as a backhoe.
Since the reference mesh 23 of the housing portion 22 has an opening size that does not allow the filling material 40 to come out, the inserted filling material 40 does not come out of the bag body 20.

<3> Draw out the hanging rope (Figure 5)
The suspension rope 30 is pulled out from a plurality of locations (for example, 6 locations) of the bag body 20 to form a plurality of loop portions 31.
Since the suspension rope 30 is inserted into the rope insertion mesh 25a having a large deformation amount, it is not necessary to accurately count the number of marks as in the prior art or to attach a marking tape to the drawing position. The drawing interval may be rough.

<4> Temporary lifting of hanging rope (Fig. 4 (c))
The pulled-out multiple loop portions 31 are collected and hung on a hook 95 having a crane function and slightly lifted.
The plurality of loop portions 32 are lifted to such an extent that the bottom of the bag body 20 is slightly lifted from the ground to eliminate the looseness of the knitted fabric of the bag body 20.
Since the tension of the suspension rope 30 does not act on the surplus length portion 26 of the bag body 20 located inside the suspension rope 30, the surplus length portion 26 remains slack (FIG. 5).

<5> Narrowing the tying rope (Fig. 4 (d))
Next, the tying rope 32 inserted into the extra length portion 26 of the bag body 20 is narrowed down, and the opening 21 of the bag body 20 is closed to complete the production of the civil engineering structure 60.
For example, after pulling out the tying rope 32 from two places and narrowing down the bag body 20, the pulling portions of the tying rope 32 are tied together so that the rope cannot be unwound.

<6> Demolding and moving The civil engineering structure 60 taken out from the mold 50 by lifting the plurality of loop portions 31 is moved to a predetermined position.
As the plurality of loop portions 31 are lifted, tension is applied to the entire suspension rope 30, and as a result, the suspension rope attachment portion 24 of the bag body 30 is narrowed down in the diameter reducing direction.

<7> Prevention of mesh splitting FIG. 2 shows a model diagram of the knitted fabric before the tension action, FIG. 3 shows a model diagram of the knitted fabric at the time of tension action, and FIG. 6 shows the civil engineering structure 60 at the time of lifting. An upper perspective view is shown.
The deformation of the mesh of the hanging rope attachment portion 24 will be described in detail with reference to FIGS.
When a tensile force acts on the two left and

right loop portions

31, 31 shown in FIG. 2 and the two

loop portions

31, 31 are pulled away from each other, as shown in FIG. The meshes 25a to 25c formed in multi-stages are greatly deformed from vertically long to horizontally long, allowing the left and

right loop portions

31, 31 to be separated.
As a result, even when the two left and

right loop portions

31 and 31 are largely separated from each other, the meshes 25a to 25c are greatly expanded in the left and right direction following the separation of the two left and

right loop portions

31 and 31.
At this time, since excessive tension does not act on the knitting yarn, it is possible to reliably prevent the meshes 25a to 25c of the hanging rope attachment portion 24 from being torn.

<7.1> Mesh Change With reference to FIGS. 2 and 3, each mesh 25 a when a tensile force is applied to the suspension rope insertion meshes 25 a and 25 a through the two left and

right loop portions

31 and 31 in the tearing direction. The shape change of ˜25c will be described.

<7.1.1> Change in Shape of Suspension Rope Insertion Mesh In the suspension rope insertion meshes 25a and 25a, the apex position is pulled by the two left and

right loop portions

31 and 31 and expands in the left and right direction. The hanging rope insertion mesh 25a, which has been in the shape of a vertically long hexagon, is deformed into a horizontally inclined hexagon while allowing the two left and

right loop portions

31, 31 to be separated. Since the suspension rope insertion mesh 25a has a larger dimensional relationship than the reference mesh 23, deformation of the suspension rope insertion mesh 25a is not hindered by the reference mesh 23.

<7.1.2> Change in shape of intermediate mesh The intermediate mesh 25b sharing the hypotenuse with the suspension rope insertion mesh 25a and the relaxation mesh 25c is dragged by the expansion displacement of each suspension rope insertion mesh 25a, and is formed from a vertically long hexagon. It transforms into a horizontally long, roughly diamond shape.
By deforming the intermediate mesh 25b, the deformation of the hanging rope insertion mesh 25a is not hindered.

<7.1.3> Shape Change of Relaxation Mesh Relaxation mesh 25c sharing the hypotenuse with intermediate mesh 25b is dragged by the expansion displacement of intermediate mesh 25b and expands in the left-right direction. The relaxed mesh 25c having a vertically long hexagon is deformed into a horizontally inclined hexagon while allowing deformation of the intermediate mesh 25b.
Since the relaxed mesh 25 c has a dimensional relationship larger than that of the reference mesh 27, the deformation of the relaxed mesh 25 c is not inhibited by the reference mesh 27.

As described above, when the expansion force is applied to the suspension rope insertion mesh 25a by being pulled by the loop portion 31, the intermediate mesh 25b and the relaxation mesh 25c are deformed following the lateral deformation of the suspension rope insertion mesh 25a. In addition, since each of the meshes 25a to 25c can be freely deformed according to the tensile force of the loop portion 31 without being affected by the reference meshes 23 and 27, the knitting yarn of the hanging rope insertion mesh 25a is difficult to cut.
If the dimensions of the suspension rope insertion mesh 25a and the relaxation mesh 25c (longitudinal pitches P ₂ and P ₄ ) are reduced, the opening amount of the suspension

rope insertion mesh

25a and 25a is reduced, and therefore the suspension rope insertion mesh 25a and the relaxation mesh 25c It is desirable that the dimension of the dimension is a dimension relationship more than twice the dimension of the reference meshes 23 and 27 (vertical pitches P ₁ and P ₅ ).

<7.2> Reason why the amount of change in the mesh of the suspension rope attachment portion is large For example, when it is assumed that the intermediate mesh 25b and the relaxation mesh 25c are omitted, the hypotenuse on the upper portion of the suspension rope insertion mesh 25a is used as a reference for the extra length portion 26 Even if an attempt is made to share with the hypotenuse of the mesh 27, the knitted fabric itself cannot be knitted because the hypotenuses have different lengths.
Even if the knitted fabric can be knitted, the suspension rope insertion mesh 25a cannot be greatly expanded and deformed in the left-right direction under the influence of the reference meshes 23 and 27. In other words, if the intermediate mesh 25b and the relaxation mesh 25c are omitted, the amount of deformation of the hanging rope insertion mesh 25a becomes small, and the knitted fabric is easily torn.

On the other hand, by combining the three types of meshes of the suspension rope insertion mesh 25a, the intermediate mesh 25b, and the relaxation mesh 25c, the suspension rope can be inserted utilizing the vertically long shape without being affected by the reference meshes 23 and 27. Since the mesh 25a can be greatly expanded and deformed, tearing of the knitted fabric of the hanging rope attachment portion 24 can be reliably prevented.

DESCRIPTION OF SYMBOLS 10 ... Civil engineering bag body 20 ... Bag main body 21 ... Bag main body opening 22 ... Bag main body storage part 23 ... Reference mesh 24 ... Suspension rope attachment part 25 of bag body ... Long vertical mesh 25a of suspension rope attachment part ... Suspension rope insertion mesh 25b ... Intermediate mesh 25c ... Relaxation Net 26 ... Extra length 27 of bag body ... Standard net 28 of extra length ... Bottom of bag body 30 ... Suspension rope 31 ... Loop Portion 32 ... Tying rope 40 ... Filling material 50 ... Formwork 60 ... Structure for civil engineering work

Claims

A mesh-shaped bag main body that can accommodate a filling material therein, a suspension rope attached at a position separated from the opening of the bag main body, and a tying rope attached in the vicinity of the opening of the bag main body A civil engineering bag body that lifts the bag body through a plurality of loop portions formed by pulling a part of the suspension rope from a plurality of locations of the bag body,
The bag body is a portion for attaching a filling material having a plurality of reference meshes, and a suspension rope attachment portion, and a suspension rope attachment portion integrally formed adjacent to the accommodation portion at the upper end of the accommodation portion, It is a part to which a tying rope is attached, and has an extra length part integrally formed adjacent to the hanging rope attaching part at the upper end of the hanging rope attaching part,
A plurality of vertically long meshes are formed in a multistage manner on the hanging rope attachment part,
The vertical pitch of the plurality of vertical meshes formed in the hanging rope attachment part is in a dimensional relationship larger than the vertical pitch of the reference mesh formed in the housing part,
Civil engineering bag.
The plurality of vertically long meshes formed in multiple stages are adjacent to the suspension rope insertion mesh formed on the suspension rope insertion mesh formed adjacent to the uppermost reference mesh of the accommodating portion, and on the suspension rope insertion mesh. The civil engineering bag according to claim 1, wherein the intermediate mesh is formed by combining the intermediate mesh formed with the relaxation mesh formed adjacent to the intermediate mesh and the lowest reference mesh of the extra length portion. body.
2. The civil engineering bag according to claim 1, wherein the developed shape of the reference mesh and the plurality of vertically long meshes is a polygon.
The civil engineering construction bag according to claim 3, wherein a developed shape of the reference mesh and the suspension rope insertion mesh of the bag body is a quadrangle or a hexagon.
The civil engineering bag according to claim 1, wherein the opening size of the reference mesh is a size capable of restricting the escape of the filling material.
2. The civil engineering bag according to claim 1, wherein the bag body is formed of a Russell net knitted with single or double knitting yarns.