JP2016061124A - Bag body for civil engineering work, and structure for civil engineering work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable restraint on not only deformation of a cross-sectional shape of a structure for civil engineering work but also deformation of the whole shape, and enhance the effect of preventing a breakage of a bag body for the civil engineering work.SOLUTION: A bag body for civil engineering work includes an embracing bag 20 that has an annular space 21 with an opened upper port, an annular filling material 30 that is housed in the embracing bag 20, and embracing bag opening closing means for closing an opening of the annular space. The embracing bag 20 closes the opening of the annular space, and circumferentially embraces the annular filling material 30 to form annular restraining earth 30a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a civil engineering bag and a civil engineering structure that can be used for various civil engineering works in the ocean or on land, and more particularly to a civil engineering bag and a civil engineering structure that restrain displacement of a filling material.

Civil engineering structures in which a bag is filled with a filling material are widely known (Patent Documents 1 and 2).
Patent Document 3 discloses a civil engineering structure in which an intermediate connecting material is pulled out from the bottom of a bag body through an opening, and the bottom net and the upper net are connected by an intermediate connecting material.

Japanese Utility Model Publication 1-1141815 JP-A-11-131447 JP 2003-129444 A

The above-mentioned civil engineering structure has the following problems.
<1> A conventional structure for civil engineering is a structure in which an inner filling material is movably enclosed by tying the mouth of a purse-like bag body with a string or the like.
For this reason, the bag is worn out and damaged early due to repeated movement of the filling material by external force.
<2> The civil engineering structure disclosed in Patent Document 3 encloses the filling material in a state in which a certain degree of movement is allowed in order to ensure followability against unevenness.
For this reason, when a large wave force or the like acts, the filling material moves inside the bag body, and the bag body still has a problem of being damaged.
<3> In the civil engineering structure of Patent Document 3, the tightening force of the intermediate connecting material is not evenly transmitted to the entire bag body.
For this reason, the restraining force of the filling material by the bag body becomes weaker as the distance from the middle connecting material increases, resulting in variations in the restraining effect of the filling material.
<4> Since the civil engineering structure of Patent Document 3 is a structure in which the upper part of the intermediate connecting member is simply tied with a tying rope provided at the mouth of the bag, after the civil engineering structure is installed The connecting part and the fixing part of the mouth part are loosened, and the binding force of the filling material is weakened.

The present invention has been made in view of the above points, and an object of the present invention is to provide at least one of the following civil engineering construction bags and civil engineering structures.
<1> Not only the deformation of the cross-sectional shape of the civil engineering structure but also the deformation of the overall shape can be restricted.
<2> The effect of preventing damage to the civil engineering pouch is improved.
<3> The construction of civil engineering structures is easy.
<4> To reduce the weight of civil engineering structures, reduce production costs, and improve transportability and handling.

The present invention is an annular civil engineering bag body filled with a filling material inside and having a central hole in the center, and an annular space having an upper opening opened between an inner opening and an outer opening A holding bag for filling the annular space with the filling material, and means for closing the holding bag for closing the annular space so as to hold the filling material over the entire circumference. To do.
The present invention is also a civil engineering structure in which a bag body is filled with a filling material, and has a central hole in the center and an annular space with an upper opening opened between an inner opening and an outer opening. A holding bag, an annular filling material accommodated in the holding bag through the annular space, and a holding means for closing the holding bag for closing the annular space, the holding bag closing the annular space, An annular constraining soil is formed by holding the annular filling material over the entire circumference.
In another embodiment of the present invention, a winding string that can be wound around the outer periphery of the holding bag using the central hole is further provided.
In another aspect of the present invention, the closing means of the holding bag is a closing string, and the closing string is used to allow mutual transmission of a load between the inner port and the outer port of the holding bag. To do.
In another embodiment of the present invention, the holding bag includes an inner lace arranged in the circumferential direction of the inner opening and an outer lace arranged in the circumferential direction of the outer opening, and the inner lace or the outer lace At least one of these may also be used as the wound string.
In another embodiment of the present invention, at least one of the inner lace or the outer lace may be used as the closing string.

The present invention has at least one of the following effects.
<1> The holding bag holds the filling material over the entire circumference to form the annular constrained soil, thereby restraining not only the deformation of the cross-sectional shape of the civil engineering structure but also the deformation of the entire shape. Thus, the stability of the civil engineering structure is improved.
<2> Since wear between the filling material and the holding bag is unlikely to occur, the effect of preventing the holding bag from being damaged due to wear can be remarkably improved, and the civil engineering structure can be maintained over a long period of time. .
<3> A structure for civil engineering can be manufactured by a simple operation of closing the annular space of the holding bag after the filling material is accommodated in the annular holding bag.
<4> Since the external force can be distributed to the entire holding bag, the external force does not concentrate on the closing portion of the holding bag.
Therefore, the opening of the holding bag after the installation of the civil engineering structure can be reliably suppressed.
<5> Even if the holding bag is loosened after installation of the structure for civil engineering work, the loosening of the holding bag can be easily eliminated by retightening the closing means of the holding bag, and maintenance after installation Easy.
<6> At least one of the inner lace or the outer lace provided in the holding bag can also be used as a wound string or a closing string. In the case where the inner lace or the outer lace is also used, a dedicated winding string or closing string can be omitted, and the construction of the civil engineering bag can be simplified.

The perspective view of the structure for civil engineering works concerning Example 1 which omitted a part The perspective view of the cylinder which constitutes the civil engineering construction bag Perspective view of civil engineering bag Perspective view of a civil engineering structure with a part broken away Enlarged cross-sectional view of a civil engineering structure The top view of the structure for civil engineering which concerns on Example 3 which equipped with the winding string Sectional view of VII-VII in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

<1> A civil engineering construction bag (FIGS. 1 and 2).
The civil engineering bag body 10 has a central hole 11 in the center, and has an annular space 21 having an upper opening opened between an inner opening 23a and an outer opening 24a, and the filling material 30 is placed in the annular space 21. The holding bag 20 to be filled and the closing means for the holding bag 20 for closing the annular space 21 so as to hold the filling material 30 over the entire circumference.

<2> Structure for civil engineering work (FIGS. 1 and 2).
The civil engineering structure A has a central hole 11 in the center and a holding bag 20 having an annular space 21 with an upper opening opened, and a filling material 30 accommodated in the annular space 21 of the holding bag 20. And means for closing the holding bag 20 for closing the opening of the holding bag 20.
In other words, the civil engineering structure A is composed of the civil engineering bag 10 and the filling material 30.

<3> A holding bag.
The holding bag 20 is a semi-cylindrical object having an annular shape with the upper part opened, and an annular space 21 is formed therein. For example, the holding bag 20 before the upper mouth is stitched has an annular body having a substantially U-shaped cross section as if the upper half of the floating ring is horizontally cut.
The bottom surface 22 and the inner and outer surfaces 23, 24 of the holding bag 20 each have an annular shape, and an annular inner port 23 a and an outer port 24 a are formed above the side surfaces 23, 24.
A space surrounded by the bottom surface 22 and the inner and outer side surfaces 23 and 24 is an annular space 21.
The cross-sectional size (cross-sectional area), maximum diameter, minimum diameter, total length, etc. of the holding bag 20 are appropriately selected according to the intended use.

<3.1> Material for holding bag.
In this example, the holding bag 20 is shown as being formed of a synthetic fiber net, but the present invention is not limited to this.
The holding bag 20 may be a net, a sheet, or a combination thereof excellent in flexibility and durability. A water-permeable or water-impermeable (water-impervious) material, or a stretchable or non-stretchable material may be used.
The material of the holding bag 20 is appropriately selected according to the use of the civil engineering structure A.

<3.2> Mouth string.
An inner lace 25 and an outer lace 26 are inserted into the mouth portions of the inner and outer side surfaces 23 and 24 of the holding bag 20 along the annular inner and outer openings 23a and 24a.
The inner opening string 25 is a string body that regulates the diameter of the inner opening 23a, and the outer opening string 26 is a string body that regulates the diameter of the outer opening 24a.
By loosening both the mouth straps 25 and 26, the diameters of both the mouths 23a and 24a can be expanded, and by narrowing the both mouth straps 25 and 26, the diameter of both the mouths 23a and 24a can be reduced.

<4> Closing means for holding bag.
In this example, a case where one or a plurality of closing strings 27 are used as closing means for opening the holding bag 20 will be described.
As will be described later, the opening of the holding bag 20 is closed by sewing between the inner port 23a and the outer port 24a of the inner and outer side surfaces 23, 24 of the holding bag 20 with a closing string 27.
The closing means of the holding bag 20 is configured so that the inner port 23 a and the outer port 24 a can be held along the circumferential direction of the holding bag 20 so that the entire circumference of the filling material 30 can be held via the holding bag 20. What is necessary is just to be able to connect between firmly, Clips etc. can also be used besides a string-like thing.

The holding bag 20 is closed in order to hold the entire filling material 30 to form the annular restraint soil 30a and to transmit the load between the inner port 23a and the outer port 24a of the holding bag 20. To make it possible.
Therefore, there is no problem even if the inner opening 23a and the outer opening 24a are slightly separated after the holding bag 20 is closed.

<5> Filling material.
The filling material 30 is a hard granule that does not compressively deform, and for example, aggregates such as crushed stones and cobblestones, lightweight aggregates, concrete glass, incinerated ash granules, and earth and sand can be used.
The material, specific gravity, size, and the like of the filling material 30 are appropriately selected according to the use of the civil engineering structure A.

<6> Annular constrained soil (FIGS. 4 and 5).
The annular constrained soil 30 a is an aggregate of annular filling materials 30 that are held around the entire circumference by the civil engineering bag 10.
Since the filling material 30 meshes with each other not only at the surface layer but also at the center portion of the annular constrained soil 30a (interlocking effect), not only can the cross-sectional shape be maintained, but also the bending strength over the entire length of the annular constrained soil 30a. , Compressive strength and shear strength become very high.
Note that the annular constraining soil 30 a allows some deformation due to the expansion and contraction of the holding bag 20.

[Manufacturing method for civil engineering structure]
Next, an example of a manufacturing method of the civil engineering structure A will be described with reference to FIGS.

<1> Preparatory work for a civil engineering construction bag (FIGS. 2 and 3).
This example demonstrates the case where the holding bag 20 is formed using the cylindrical cylinder 20a.
In the vicinity of the openings at both ends of the cylindrical tube 20a, an inner lace 25 and an outer lace 26 are respectively inserted along the circumferential direction.

The holding bag 20 having a bottomed double cylinder structure is formed by folding the cylindrical cylinder 20a at its center. A central hole 11 is formed inward of the inner opening 23a.
When the holding bag 20 is formed, the inner mouth strap 25 is squeezed to reduce the diameter of the inner mouth 23a of the holding bag 20, and the outer mouth strap 26 is loosened to increase the diameter of the outer mouth 24a. The opening size of the upper portion of the annular space 21 is determined by the difference in diameter between the two ports 23a and 24a.

<2> Filling with filling material (FIG. 3).
The inside filling material 30 is filled until the entire annular space 21 is filled in the state where the upper opening of the holding bag 20 is maintained.
The filling amount of the filling material 30 is set such that the filling material 30 can be restrained by the holding bag 20 when the annular space 21 of the holding bag 20 is closed.
Moreover, if the inner opening 23a and the outer opening 24a of the holding bag 20 are held using a production frame (not shown), the filling operation of the filling material 30 can be performed smoothly.

<3> Closing of the holding bag (FIGS. 4 and 5).
The construction of the civil engineering structure A is completed by stitching (connecting) the inner bag 23a and the outer bottle 24a of the holding bag 20 with a closing string 27 along the circumferential direction. By closing the holding bag 20 with the closing means, the holding bag 20 has a sealing structure like a seamless tube, and holds the entire circumferential surface of the annular filling material 30.
The civil engineering structure A is used for a desired civil engineering work in the ocean or land.
The diameter of the central hole 11 of the civil engineering structure A is appropriately set according to the use of the civil engineering structure A.
The inner lace 25 and the outer lace 26 are shortly tied so as not to get in the way.

[Functions of civil engineering structures]
<1> Prevention of breakage of the holding bag (FIG. 3).
As described above, the civil engineering structure A according to the present invention can secure a large holding area of the filling material 30 by the holding bag 20 as compared with the conventional structure, so that the free movement of the filling material 30 is ensured. And can be effectively restrained.
Therefore, wear of the holding bag 20 due to the free movement of the filling material 30 is prevented, and the durability of the holding bag 20 is remarkably improved.

  For example, it is possible to constrain the outer peripheral surface of a lump of filling material even if the filling material is fully packed in a drawstring bag and the top of the bag is closed. A large contact area between the material and the bag cannot be secured. Therefore, the binding force varies between the surface layer and the center portion of the filling material.

On the other hand, in the present invention, paying attention to this contact area, the annular holding bag 20 is used as the bag body, and the inner packing material 30 is also arranged in an annular shape, so that the entire circumferential surface of the inner packing material 30 is used. The holding area (restraint area) of both the members 20 and 30 that hold the bag with the holding bag 20 is ensured.
When the civil engineering structure A of the present invention is compared with a conventional civil engineering structure in which a purse-like bag is packed with a filling material, if the filling material 30 of both structures is the same amount In addition, the civil engineering structure A of the present invention has a significantly larger holding area with the filling material 30 than in the prior art.
Therefore, in the civil engineering structure A, not only the holding force does not vary between the surface layer and the central portion of the filling material 30 but also the civil engineering structure A is installed even in the ocean. Since the free displacement can be reliably restrained, damage due to wear of the holding bag 20 can be prevented over a long period of time.

<2> Prevention of deformation of civil engineering structures (Figs. 4 and 5).
When only one cross section of the civil engineering structure A is captured, most of the holding bag 20 is strained by the weight of the filling material 30, but the weight of the filling material 30 acts on the upper portion of the holding bag 20. I'm not nervous because I don't.
Therefore, when the space between the inner port 23a and the outer port 24a of the holding bag 20 is tightened by the closing string 27, the inner side surface 23 and the outer side surface 24 are tensioned to hold the filling material 30 toward the center.
The tightening force by the closing string 27 may be a force that can cover the filling material 30 in a state in which the upper half of the holding bag 20 is not slack.
Thus, the holding bag 20 is tensioned over the entire circumference of one cross section, and the filling material 30 is held (restrained) through the holding bag 20 over the entire circumference.
Since the holding (restraining) action of the filling material 30 by the holding bag 20 described above acts over the entire cross section (full length) of the structure A for civil engineering, the filling material 30 having an annular shape is The bag is held (restrained) by the holding bag 20.
Therefore, since the civil engineering structure A is difficult to deform not only in its cross-sectional shape but also in the overall shape, for example, even when the civil engineering structure A is installed at a site where large waves act, A is difficult to move from the installation location.

<3> Prevention of opening of the holding bag.
By closing the opening of the holding bag 20 with the closing string 27, load transmission between the inner opening 23a and the outer opening 24a is possible.
Therefore, since the external force that has acted on a part of the civil engineering structure A can be distributed throughout the holding bag 20, the external force does not concentrate on the closing portion of the holding bag 20.
Therefore, the opening of the holding bag 20 after the civil engineering structure A is installed can be reliably prevented.

<4> Re-tension of the holding bag.
It is expected that the holding bag 20 will be loosened for some reason after the civil engineering structure A is installed.
In such a case, for example, loosening of the holding bag 20 can be eliminated by retightening the closing means (closing string 27).
That is, the inner bag 23a and the outer bag 24a of the holding bag 20 can be tightened to re-tension the holding bag 20 to eliminate slack.

<5> Action of the central hole.
The civil engineering structure A having a donut shape has a central hole 11 at the center thereof.
When this civil engineering structure A is installed at a site such as a sea where a torrent or a huge wave force acts, the central hole 11 exhibits a plurality of beneficial effects as described below.

<5.1> Reduction of lift.
When the civil engineering structure A according to the present invention and the conventional civil engineering structure in which the same volume of filling material is packed in the purse-like bag body are installed in the above environment, the civil engineering structure is determined depending on the presence or absence of the central hole. There is a large difference in the lift generated in the construction structure. A specific comparison will be described.

In a conventional civil engineering structure having a cushion shape without a central hole, the lift acting surface caused by the water flow is the entire bottom surface of the civil engineering structure.
Therefore, it was necessary to make the total weight of the civil engineering structure a weight that can oppose the lift acting on the entire bottom surface.

  On the other hand, in the civil engineering structure A according to the present invention having the central hole 11, the annular bottom area on which the lift due to the water flow acts is smaller than the conventional area, and the lift can be released through the central hole 11. Therefore, the total weight of the civil engineering structure A can be reduced, and the transportation and handling of the civil engineering structure A can be improved.

Even if both the present invention and the conventional civil engineering structure have water permeability, the water permeability of the civil engineering structure decreases due to clogging over time.
Therefore, the civil engineering structure A according to the present invention having the central hole 11 has an advantage that it is less susceptible to lift than a conventional civil engineering structure having no central hole.
In other words, in the civil engineering structure A according to the present invention, the movement limit flow velocity is increased as compared with the civil engineering structure having no central hole.

<5.2> Damping action of water flow.
The presence or absence of the central hole causes a large difference in the roughness coefficient due to the resistance of the civil engineering structure.

  A conventional civil engineering structure that has a cushion shape without a central hole has a flat shape with few irregularities on the outer surface, so the roughness coefficient of the civil engineering structure is small and a large damping effect is obtained against water flow. I can't.

  On the other hand, in the civil engineering structure A of the present invention, since the central hole 11 is recessed in the center, the roughness coefficient of the civil engineering structure A is larger than that of the conventional structure, so that A great damping effect is obtained.

<5.3> Anti-scouring action.
As described above, the civil engineering structure A according to the present invention having the central hole 11 has a greater damping effect on the water flow than the conventional civil engineering structure having no central hole. The scouring prevention effect at the bottom of the body A downstream is high.

  In the following, other embodiments will be described. In the description, the same parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

<1> Other opening and closing means of the holding bag.
In previous Example 1, it demonstrated to the form which uses the exclusive closure string 27 as a closing means of opening of the holding bag 20. FIG.
As the closing means for the other opening of the holding bag 20, either the inner mouth strap 25 or the outer mouth strap 26, or both may be used.
The inner strap 25 or the outer strap 26 to be attached to the holding bag 20 is secured in advance for a long length, and after the filling bag 30 is filled with the filling material 30, it is loosened as shown in FIG. The opening of the holding bag 20 is closed using the extra length portions of the drawn out mouth straps 25 and 26.
As a specific closing method, for example, a method in which the extra length portions of both mouth straps 25 and 26 are connected to each other, and an extra length portion of one of the mouth straps 25 and 26 is connected to the inner port 23a or the outer port 24a facing each other. There is a method of sewing.

<2> Effects of this example.
In this example, in addition to the effect of the first embodiment, the inner lace 25 or the outer lace 26 can be used as a closing means for the opening of the holding bag 20 and the dedicated closing lace 27 is omitted. Can do.

<1> An embodiment in which a wound string is added.
With reference to FIGS. 6 and 7, an embodiment in which a winding cord 28 that can be wound around the outer periphery of the holding bag 20 using the central hole 11 is added will be described.

<2> Wound string.
The winding cord 28 is one or a plurality of restraining members, and has a length capable of being wound around the holding bag 20 and a strength capable of restraining the filling material 30.
As the wound string 28, a rope material, a belt material, a band material, or the like can be used.
The winding string 28 is wound around the outer periphery of the holding bag 20 by using the central hole 11, or the winding string 28 is wound alone or spirally.
The winding interval of the winding cord 28 is not limited to the equal interval shown in FIG. 6, and the winding interval may be changed as appropriate.

<3> Combined use of string.
The winding cord 28 may be dedicated, but either the inner mouth cord 25 or the outer mouth cord 26, or both can be used.
When the inner lace 25 or the outer lace 26 is also used as the wound string 28, a length that can be wound around the holding bag 20 is secured in advance.
By using the inner mouth strap 25 or the outer mouth strap 26 and wrapping around the holding bag 20 and tightening the filling material 30, the dedicated winding cord 28 can be omitted.

<4> Effects of this example.
In the embodiment described above, the annular restraining soil 30a that is difficult to deform is formed by holding the entire circumferential surface of the annular filling material 30 by the holding bag 20.
In this example, in addition to the effects of the first embodiment, by additionally arranging the winding cord 28, the annular annular restraint soil 30a is divided into a plurality of pieces and partitioned by the winding cord 28. The holding power of the section can be further increased.
Therefore, the displacement prevention effect of the filling material 30 is enhanced as compared with the previous embodiment, and the overall shape of the civil engineering structure A is further difficult to deform.
Moreover, since the winding cord 28 covers the holding bag 20 and restrains deformation and displacement of the holding bag 20, the effect of preventing the holding bag 20 from being damaged is also enhanced.
The civil engineering structure A in this example is suitable for a site where a very large loading load or a huge wave force acts.

  In addition, as another winding form of the winding cord 28, the winding cord 28 (not shown) may be additionally wound so as to surround the outermost periphery of the holding bag 20 without passing through the central hole 11.

A ··· Civil engineering structure 10 · · · Civil engineering bag 11 · · · Central hole 20 · · · Holding bag 21 · · · Ring space 22 · · · .... the bottom surface 23 of the holding bag ... the inner side surface 23a of the holding bag ... the inner port 24 ... the outer side surface 24a of the holding bag ... the outer port 25 ... ... Inner lace 26 ... Outer lace 27 ... Closure tie 28 ... Wound tie 30 ... Filling material 30a ... Ring-restraint soil

Claims (10)

An annular civil engineering bag that is filled with a filling material and enclosed inside,
A holding bag that has a central hole in the center, has an annular space with an upper opening opened between the inner opening and the outer opening, and fills the annular space with a filling material;
A holding bag closing means for closing the annular space so as to hold the filling material over the entire circumference,
Civil engineering bag.   The civil engineering bag according to claim 1, further comprising a winding string that can be wound around the outer periphery of the holding bag using the central hole.   The closing means of the holding bag is a closing string, and the closing string is used to close the opening so as to allow mutual transmission of load between the inner port and the outer port of the holding bag. Item 3. A civil engineering bag according to item 1 or 2.   The holding bag includes an inner lace arranged in a circumferential direction of an inner opening and an outer lace arranged in a circumferential direction of an outer opening, and at least one of the inner lace or the outer lace is attached to the wound string. The civil engineering work bag according to any one of claims 1 to 3, wherein the bag for civil engineering work is also used.   The holding bag has an inner lace arranged in the circumferential direction of the inner opening and an outer lace arranged in the circumferential direction of the outer opening, and at least one of the inner lace or the outer lace is used as the closing string. The bag for civil engineering work according to any one of claims 1 to 3, wherein the bag for civil engineering work is also used. A civil engineering structure in which a bag is filled with a filling material,
A holding bag having an annular space having a central hole in the center and an upper opening opened between the inner opening and the outer opening;
An annular filling material housed in a holding bag through the annular space;
A holding means for holding a holding bag for closing the annular space,
The holding bag closes the annular space and forms the annular restraint soil by holding the annular filling material over the entire circumference.
Civil engineering structures.   The civil engineering work according to claim 6, further comprising a winding string that can be wound around the outer periphery of the holding bag using a central hole, wherein the winding string is wound around the outer periphery of the holding bag. Structure.   The closing means of the holding bag is a closing string, and the closing string is used to close the opening so as to allow mutual transmission of load between the inner port and the outer port of the holding bag. Item 8. The civil engineering structure according to item 6 or 7.   The holding bag includes an inner lace arranged in a circumferential direction of an inner opening and an outer lace arranged in a circumferential direction of an outer opening, and at least one of the inner lace or the outer lace is attached to the wound string. The civil engineering structure according to any one of claims 6 to 8, characterized in that it is also used as a structure.   The holding bag has an inner lace arranged in the circumferential direction of the inner opening and an outer lace arranged in the circumferential direction of the outer opening, and at least one of the inner lace or the outer lace is used as the closing string. The civil engineering structure according to any one of claims 6 to 8, wherein the civil engineering structure is also used.

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