JP6625327B2 - Greening sandbag, method of forming greening sandbag using the same, method of retaining and greening - Google Patents

Description

  The present invention relates to a greening sandbag bag that can be used for forming earth retaining or earthworks on a slope or the like, and that can be greened after construction, and a method for forming a green sandbag using the green sandbag bag. And also relates to methods of retaining and greening.

  Today, natural disasters such as landslides are increasing, and slopes may collapse. In such a case, a sandbag is used to prevent the collapsed portion from spreading or to provide an emergency protection for preventing the collapsed portion from occurring.

  Patent Literature 1 describes an earth retaining method in which a sandbag having a through hole in a vertical direction is vertically stacked to obtain sufficient strength as a permanent structure in a short period of time. Patent Document 2 discloses an embankment in which a container in which reinforcements made of a rigid material are laid in a substantially horizontal direction is filled with earth and sand to form a large sandbag, and the sandbags are continuously arranged in parallel to form an earthwork. Are described.

  As described above, the earthworks and earth retaining portions formed by the sandbags have sufficient strength, and thus may be left as they are. It is conceivable that the neglected sandbags may be damaged due to deterioration, and the earth and sand may overflow. Therefore, in anticipation of being left as it is, a large sandbag is formed using a sandbag having weather resistance.

JP 2010-203114 A JP-A-6-57752

  However, the state in which the sandbags are arranged for a long period of time impairs the landscape, and there is room for improvement.

  The present invention has been made in consideration of the above-described matter, and can easily form a large sandbag efficiently, and can quickly form an earthwork or earth retaining material, and in the long term after construction. The present invention provides a green sandbag and a method for forming a green sandbag using the green sandbag, which can achieve greening and further stabilize the stacked sandbags, and further provide a method for soil retention and greening. The purpose is to do.

The present invention has a bag body formed by using a bag net having a strength necessary to put earth and sand having a measure that allows plants to germinate, and
Plant seeds on the inner surface of the base cloth having a base net or a base net having a mesh that allows the plant to germinate and a sheet capable of germinating the plant and arranged along the inner surface of the bag body. With a vegetation sheet that is dispersed and held,
The bag body includes a hanging belt for lifting,
It is configured to be able to form a self-sustaining sandbag by putting earth and sand inside,
The vegetation sheet is provided so as to be detachable only at the opening edge of the bag body, and provides a green sandbag. (Claim 1)

  The bag body is provided with the strength necessary for pouring earth and sand, and is formed using a bag net that is designed to allow plants to germinate. And does not hinder the passage of the seeds when the plant seeds germinate. The bag body has, for example, a circular or rectangular bottom portion and a side portion continuously provided on the outer periphery of the bottom portion. The bag body further includes a hanging belt provided for continuous connection from the bottom portion. Then, the green sandbags can be lifted via the suspension belt and installed at a predetermined position on the slope or at a predetermined position on the river embankment, so that earth retaining or earthworks can be formed immediately.

  In addition, the mesh of the bag net is preferably 1 mm to 15 mm, and more preferably 3 mm to 8 mm. When the mesh of the bag net is smaller than 3 mm, it is likely that the germination of the plant may be hindered. On the other hand, when the mesh of the bag net is larger than 8 mm, the earth and sand are likely to leak (spill easily). This is because there is a fear. The material of the bag net is preferably made of synthetic resin fiber having both flexibility and strength, and most preferably polypropylene. Further, it is preferable that the bottom portion is formed using a fabric having higher strength such as a flat yarn cloth. Further, it is preferable that a net having a large mesh of about 1 cm is continuously provided at the mouth of the bag body so that the opening can be closed. Moreover, in this invention, it is comprised so that the sandbag which can be independent may be formed by throwing in earth and sand inside. That is, a green sandbag is formed by putting a large amount of earth and sand into the green sandbag, and the green sandbag is configured to be able to stand on its own. When soil retaining is formed at a predetermined position on a slope or at a predetermined position on a river embankment, for example, as shown in FIG. 4, the green sandbags formed by the green sandbags of the present invention are stacked step by step on the construction site. Even if it is arranged, each green sandbag is only placed, and it can be installed independently by its own gravity, so `` A member for fixing to the construction site is necessary, and time and labor for that Compared to a sandbag that is not self-sustaining, there are advantages such as requiring less time and effort for installation and easy installation. That is, even if the sandbags that cannot be self-supported are stacked, it is necessary to anchor them with, for example, a pile. By the way, in the present invention, in order to obtain the above-mentioned "sandbag capable of being independent", it is preferable to use a greening sandbag having a size and a shape similar to a general large sandbag, and the shape of the green sandbag is preferably a cylindrical shape. Examples include a shape and a rectangular parallelepiped. For example, from a bottomed cylindrical greening sandbag having a bottom having a diameter of 800 mm to 1200 mm and a side having a height of 600 mm to 1100 mm as shown in FIG. Can be formed. In this case, a large amount of earth and sand of 0.65 tons (t) to 1.2 tons (t) is charged. The large-sized green sandbag of the present invention into which a large amount of earth and sand is charged preferably has a length-to-width ratio (length: width) of 1: 0.8 to 1: 1.3. In the aspect ratio, if the horizontal value when the height is set to 1 is smaller than 0.8, the balance is poor and it is difficult to install independently. If the value is larger than 1.3, the installation is performed. Since it is not possible to increase the height with respect to the area, it is necessary to increase the number of steps when trying to set up to a predetermined height, and there is a possibility that labor and cost may be excessively increased.

  Since the base cloth is composed of a base net or a base net and a sheet capable of germinating the plant, the seeds of the plant do not prevent the seed from germinating, and The plant seed can be held at a predetermined position on the inner surface of the bag body. Further, the base net constituting the base cloth is preferably an entangled woven net. It is preferable that the plant seed is a plant seed that can deeply penetrate into soil and sand because the strength of the sandbag can be increased by penetrating the soil into soil as the plant grows.

  In addition, the sheet through which the plant can germinate is preferably, for example, thin cotton entangled with a substrate net and shaped into a sheet, but instead of a water-soluble sheet, a water-soluble glue Even a water-insoluble fiber or non-woven fabric polymerized in a sheet shape may be used as long as it does not hinder the germination of plant seeds.

  Green sandbags can be formed by putting local earth and sand into the green sandbags of the above configuration, and earth retaining and earthworks can be formed, and in the long term local greening and stabilization of sandbags by plant roots This can greatly contribute to landscape protection.

  In addition, since the vegetation sheet is detachably fixed only at the opening edge of the bag body, the vegetation sheet only hangs from the opening edge of the bag body, so to speak, the vegetation sheet and the bag body at the time of pouring earth and sand. The vegetation sheet is not easily deformed due to twisting or wrinkling due to the vegetation sheet falling off from the bag body when excessive force is applied due to being dragged together with earth and sand by being sandwiched by gravel etc. Further, it is possible to prevent the bag body from being distorted and the appearance from being deteriorated.

  In the case where the vegetation sheet is formed by fixing a protective sheet through which plants can pass so as to cover the inner surface of the plant seed (Claim 2), when pouring earth and sand into the bag body, the plant seed is subjected to impact by the earth and sand. And can be protected from falling off due to rubbing. In the case where the protection sheet is provided on the inner surface of the vegetation sheet, there is an advantage that when the earth and sand is charged into the bag body, the damage to the vegetation sheet due to the earth and sand can be reduced by the protection sheet.

  The protective sheet is, for example, a sheet that can be dissolved in water, and it is preferable that this sheet is adhered and fixed with a water-soluble glue or the like. That is, when earth and sand are thrown in and the earth and sand come into contact with the protective sheet and become moist, they dissolve in water, so that plant seeds can be easily rooted. Since the water-soluble paste is a water-absorbing polymer such as polyvinyl alcohol, water can be retained, and an environment where plant seeds can easily grow can be prepared.

On the other hand, it is also possible to use a water-insoluble sheet having a measure that allows plants to pass through as a protective sheet. In this case, the protective sheet may be formed of a hard and dense mesh so that the leakage of earth and sand can be reliably prevented. The mesh of the protective sheet is preferably 1 mm to 15 mm, more preferably 3 mm to 8 mm.
If the weight is smaller than 3 mm, the root of the plant may be easily hindered. On the other hand, if the weight is larger than 8 mm, the earth and sand may leak (easily spill).

  Also, a method for forming a green sandbag using the green sandbag according to claim 1 or claim 2, wherein when the earth and sand are charged using a heavy machine, when excessive force is applied to the vegetation sheet, In the case where the vegetation sheet falls off from the fixing portion fixed so that it can be dropped off only at the opening edge of the main body, whereby the vegetation sheet is less likely to be deformed by twisting, wrinkling, or the like (claim 3). Since the earth and sand is introduced by using a heavy machine, a large amount of earth and sand, for example, about 1 ton (t) can be introduced into one green sandbag, and the formation of a self-sustaining sandbag can be performed efficiently, and the worker can The cost is lower than the input work (filling of sandbags).

  In addition, since the vegetation sheet is attached to the bag body only at the opening edge of the bag body, the manufacturing cost can be reduced. It is more preferable to simply attach the vegetation sheet to the bag body by using staples, so that the vegetation sheet can be dropped even when the staples come off from the bag body. The vegetation sheet can be attached to the bag body by suturing with a thread, an adhesive, or the like in addition to staples.

  It is preferable that the vegetation sheet is disposed on the front surface after construction, but not on the lower and rear surfaces. That is, the vegetation sheet can be efficiently disposed on the surface of the sandbag, and the sandbag can be greened without waste. In addition, when pouring earth and sand into the bag body, the smaller the portion where the vegetation sheet is provided, the higher the work efficiency.

In the method for retaining and greening according to the fifth aspect , a self-supporting sandbag efficiently formed using, for example, a heavy machine is lifted via a lifting belt provided on the bag body, and the predetermined position on the slope is provided. Alternatively, since it is installed at a predetermined position on a river embankment, it is suitable for quickly forming a retaining wall or an earthwork, and is also preferable in that it is possible to improve the landscape and improve the landscape in the long term in the long term. When plant seeds germinate and pass through, the soil can be stopped by the roots of the plants being set up in the soil, so that even if the green sandbags are deteriorated and may be torn, it is possible to prevent the loss of sediment. it can.

  As described above, according to the present invention, it is possible to form a soil or an earthwork at a predetermined position on a slope or a predetermined position on a river embankment in a short period of time, and grow plants on the site after the construction. By doing so, greening can be achieved and the landscape can be improved. Further, the present invention is configured such that sandbags are formed by putting earth and sand inside the greening sandbag, and the present invention is provided at a predetermined position on a slope or a predetermined position on a river embankment. Since the sandbags formed by the green sandbags are simply placed and can be installed independently by their own gravity, members are required for fixing the slopes at predetermined positions or river bank dikes. In comparison with sandbags that cannot be self-sustained and require much time and effort, there is an advantage that the time and effort for installation is reduced and the installation is easy.

It is a figure which shows the example of the green sandbag which has the basic part of this invention. It is a figure explaining the method of throwing in earth and sand in the said greening sandbag. It is a figure which shows the example of the formed green sandbag. It is a figure which shows the state in which the green sandbag was installed. It is a figure showing an example of greening using greening sandbags. It is a figure which shows the example of the greening sandbag of embodiment of this invention. It is a figure explaining the situation which puts earth and sand in the greening sandbag of FIG.

  A green sandbag 1 and a green sandbag 2 according to the present invention will be described below with reference to FIGS. As shown in FIG. 1, a green sandbag 1 is formed by sewing the green sandbag 1 into a bag shape using a bag net having a mesh that allows the plants to germinate and has a strength necessary for pouring earth and sand. The bag includes a main body 3 and a vegetation sheet 4 arranged along the inner surface of the bag main body 3.

  The bag body 3 is, for example, a substantially circular bottom portion 10 having a diameter of 1.1 m made of a high-strength synthetic resin cloth material such as a flat yarn cloth, and is sewn to an outer periphery 10a of the bottom portion 10 to have a height. A bag net 11 forming a 1.1 m cylindrical side surface, a squeezed portion 12 formed of a coarse single Russell net sewn to be connected to the upper end of the net 11 on the side surface, and a 100 mm wide A belt 13a made of polypropylene fiber is sewn to the bottom surface of the bottom portion 10 so as to intersect at right angles at the center thereof, and is vertically sewn to the bag net 11 on the side surface portion. (Only shown). Reference numeral 12a denotes an aperture rope made of polypropylene fiber which is provided so as to pass through the opening 12b formed at the upper end of the aperture section 12 so as to go around the opening 12b.

  On the other hand, the vegetation sheet 4 includes a plant seed 16 dispersed and held on an inner surface of a base cloth 15 disposed on an inner surface of the bag-shaped net 11 as shown in a partially enlarged view surrounded by a dashed line, A water-soluble or water-soluble protective sheet 18 adhered to the base cloth 15 with a water-soluble glue 17 such as polyvinyl alcohol so as to cover the inner surface of the seed 16. .

  The base cloth 15 is provided with a base net 15a made of an entangled net having a mesh that allows plants to germinate, and a thin cotton 15b entangled with the base net 15a and shaped into a sheet. . The plant seeds 16 are desirably seeds of local plants, but are preferably plants that can easily penetrate into the injected earth and sand, and are referred to as western turf, which can be expected to have an effect of preventing soil runoff by greening, bermudagrass, You may use creeping red fescue, bent glasses, etc. Further, the water-soluble protective sheet 18 is not only a water-soluble sheet, but also is obtained by polymerizing coconut fiber, jute fiber, biodegradable plastic or photodegradable plastic fiber with a water-soluble glue or the like. There may be.

  FIG. 2 is a diagram illustrating a process of putting earth and sand into the greening sandbag. In FIG. 2, reference numeral 20 denotes a substantially U-shaped support frame in a plan view, which holds the opening 1 a of the greening sandbag 1 in a state of being extended and suspended, and reference numeral 21 denotes an earth and sand 22 from the open side of the support frame 20. A heavy machine 23 such as a hydraulic shovel is a vegetation sheet 23 that covers the opening 1a after the earth and sand 22 are filled. Since the vegetation sheet 23 of the present embodiment has the same configuration as the vegetation sheet 4, detailed description thereof is omitted.

  As shown in FIG. 2, the green sandbag 1 forms an eyelet 11 a at the joint between the bag net 11 and the squeezed portion 12 by reinforcing the bag net 11 so that the hanging hook 20 a can be hooked. The narrowed portion 12 located above this is configured to be set on the support frame 20 in a state of being folded outward.

  Since this green sandbag is large in size, it is configured to use a heavy machine 21 to put a large amount of earth and sand 22 of, for example, about 1 ton (t). Can be. That is, the construction is carried out quickly by bringing heavy equipment to a site where a retaining wall or an earthwork is formed. Since the vegetation sheet 4 is also arranged on the inner side of the bag net 11 when the earth and sand 22 are thrown in, the vegetation sheet 4 can be easily thrown in and the protection sheet 18 is arranged so as to cover the inside of the plant seed 16. Therefore, it is possible to prevent the plant seeds 16 from being damaged or falling off due to rubbing or the like when the earth and sand 22 are charged.

  When the charging of the earth and sand is completed, the opening 1a is covered with the vegetation sheet 23 so that the protective sheet 18 dissolvable with water is on the inside (that is, the lower surface), the hanging belt 13 is hooked on a heavy machine, and the hanging hook 20a is attached. By removing, the greening sandbag 1 can be lifted by the heavy equipment 21.

  FIG. 3 shows a state of the green sandbag 1 detached from the support frame 20. The opening 1a of the green sandbag 1 is pulled by pulling the drawing rope 12a of the green sandbag 1 and narrowing the opening 1a. Is closed so that the green sandbag 2 can be easily formed. Note that the thus formed green sandbag 2 has a front surface and a back surface depending on the portion where the vegetation sheet 4 is arranged, and can be adjusted to the site at the time of installation on the construction portion.

  In addition, the above-mentioned green sandbag 1 can be folded and transported at the time of transportation before use, and becomes greenery sandbag 2 by packing earth and sand at the site, so that it is needless to say that the cost for transportation can be reduced.

  FIG. 4 is a diagram showing a state of a site where the green sandbag 2 is formed as a soil clasp. As shown in FIG. 4, the green sandbags 2 are densely arranged in the lateral direction, and are arranged so as to be gradually overlapped with each other in the depth direction by shifting by about half the diameter of the green sandbags 2. Thereby, the portion where the vegetation sheet 4 and the vegetation sheet 23 are formed can be located on the surface or upper surface of the earth retaining or earthwork.

  Each of the vegetation sheet 4 and the vegetation sheet 23 accommodated in the green sandbag 2 contains the earth and sand 22 in the green sandbag 2, so that the plant seeds 16 can be dissolved in the earth and sand 22 via the water-soluble protective sheet 18. Contact. Therefore, when the dissolvable protective sheet 18 is dissolved by water such as rainfall, the plant seeds 16 come into contact with the earth and sand 22 to facilitate germination. Further, since the base cloth 15 is formed by wrapping a thin net with a net having an eye for allowing the plants to germinate, the base cloth 15 does not prevent the germination of the plant seeds 16. The use net 11 can also easily germinate and grow.

  Further, since the plant seeds 16 are originally protected by the protective sheet 18 in a state of being appropriately dispersed and attached to the inner surface of the base cloth 15, the plant seeds 16 do not fall off when the earth and sand 22 are thrown in, and are substantially even. Can germinate. Further, polyvinyl alcohol used as an adhesive for the plant seeds 16 is excellent in hydrophilicity and excellent in water absorption by polymer polymerization, so that a moisturizing effect can be expected.

  FIG. 5 is a diagram showing a situation where several months have passed since the green sandbags 2 were installed. As shown in FIG. 5, the planting 24 grows from all over the surface and top surface of the green sandbag 2, and the green sandbag 2 of the present embodiment is simply left on site after the construction, Greening can be achieved, and the scenery is improved by growing the plant 24. In addition, since the roots of the grown plants 24 are stretched inside the green sandbag 2, the outflow of the earth and sand 22 can be prevented by the roots of the plants. Further, by extending the roots into the local ground, further improvement in stability can be expected.

  The vegetation sheets 4 and 23 configured as in this example are provided with the protective sheet 18 on the inner surface in contact with the earth and sand 22, and the base net 15a made of a hard and dense mesh on the inner surface of the bag net 11. The arrangement prevents leakage of the earth and sand 22 and does not hinder the roots of the plant 24. In addition, since the plant seeds 16 that have passed can germinate from the net of the bag net 11 that has the eye that can germinate, there is nothing that hinders their growth.

  When using the protective sheet 25 made of a hard and dense mesh as in this example, this mesh may be provided on the entire inner surface of the bag net 11 constituting the side surface of the green sandbag 1. In some cases, it may be provided on the inner surface of the bottom portion 10. In this case, the plant seeds 16 are gently protected by the relatively soft and coarse bag net 11 so that the plant seeds 16 can pass through, and the hard and dense mesh net 25 protects the plant seeds 16 from the earth and sand 22. It is possible to prevent the runoff of the earth and sand 22 reliably, sufficiently maintain the function as a sandbag, and efficiently achieve greening by the plant 24.

  6 and 7 are views for explaining the embodiment of the present invention, FIG. 6 is a longitudinal sectional view, and FIG. 7 is a view for explaining a state in which earth and sand are charged. In FIGS. 6 and 7, the members denoted by the same reference numerals as those in FIGS. 1 to 5 are the same or equivalent members, and detailed description thereof will be omitted to avoid redundant description.

  In FIG. 6, reference numeral 30 denotes a green sandbag in this embodiment. The vegetation sheet 4 is fixed to the bag body 3 only at the opening edge 3a of the bag body 3 by staples 4a. The fixing by the staples 4a is performed at such a strength that the staples 4a fall off when an excessive tensile strength of 2 kN / m or more is applied, so that an excessive force when the earth and sand 22 are charged can be absorbed.

  The example illustrated in FIG. 7 illustrates a state in which an excessive tensile force (for example, a tensile force of 2 kN / m or more) is applied to the vegetation sheet 4 due to bias or pinching of gravel or the like when the earth and sand 22 are charged. As shown in FIG. 7, when an excessive force is applied to the vegetation sheet 4, a tear 4 b is generated in the vegetation sheet 4, or the staples 4 a are detached from the bag body 3. By partially falling off from the portion 3a, the earth and sand 22 move so as to be evenly contained in the bag body 3. Thereby, it is possible to prevent the appearance of the vegetation sheet 4 from being wrinkled due to twisting or pulling on the outer shape of the greening sandbag formed by using the greening sandbag bag 30, and to improve the appearance.

1,30 Greening sandbag 2 Greening sandbag 3 Bag body 3a Opening edge 4,23 Vegetation sheet 11 Net for bag 13 Hanging belt 15 Base cloth 15a Base net 15b Thin cotton (sheet)
16 Plant seed 17 Glue 18 Protective sheet 22 Earth and sand 24 Plant

Claims (5)

A bag body formed by using a bag net having a strength necessary to feed earth and sand with a target that a plant can germinate, and
Plant seeds on the inner surface of the base cloth having a base net or a base net having a mesh that allows the plant to germinate and a sheet capable of germinating the plant and arranged along the inner surface of the bag body. With a vegetation sheet that is dispersed and held,
The bag body includes a hanging belt for lifting,
It is configured to be able to form a self-sustaining sandbag by putting earth and sand inside,
A green sandbag, wherein the vegetation sheet is detachably fixed only at an opening edge of the bag body.   2. The green sandbag according to claim 1, wherein the vegetation sheet is formed by fixing a protective sheet through which plants can pass so as to cover an inner surface of the plant seed.   A method for forming a green sandbag using the green sandbag according to claim 1 or 2, wherein when heavy soil is applied using a heavy machine, an excessive force is applied to the vegetation sheet. A method for forming a green sandbag, wherein a vegetation sheet falls off from a fixing portion fixed so as to be detachable only at an opening edge portion, whereby deformation of the vegetation sheet due to twisting, wrinkling, or the like is less likely to occur. A method for forming a green sandbag using the green sandbag according to claim 1 or claim 2, or a method for forming a green sandbag according to claim 3, wherein the charging of the sand body is completed. A method for forming a green sandbag, wherein a vegetation sheet different from the fixed vegetation sheet is placed over the opening of the bag body. A green sandbag formed by using the green sandbag according to any one of claims 1 to 2, or a green sandbag formed by the method according to any one of claims 3 to 4. A method for retaining and greening, characterized in that the reclaimed green sandbag is lifted via a suspension belt and installed at a predetermined position on a slope or a predetermined position on a river embankment.

Images