JP4723392B2 - Dehydration bag for vegetation - Google Patents

Description

  The present invention relates to a vegetation dewatering bag used for dehydration of mud and formation of vegetation.

  In recent years, structures that are in harmony with the environment have been demanded in the civil engineering field. For example, in river protection works, those that can be greened like road slope works are desired.

  Conventionally, sandbag bags for vegetation have been used for greening in road slope construction, etc., and in Patent Document 1, slow-release fertilizer with a long duration of fertilization is put in a bag piece for filling soil. A vegetation bag to which a fertilizer-containing bag piece is attached is disclosed. This is for sprouting and growing the seeds of the plants in the plantation within the bag for filling the plantation with the slow-release fertilizer. Patent Document 2 discloses a vegetation bag in which a part of the vegetation bag has a double structure, and the slow release fertilizer is prevented from being biased in the vegetation bag.

  On the other hand, muddy soil with a high water content is accumulated in rivers and lakes. If such mud can be effectively used for revetment work, etc., it will be advantageous in terms of cost. As a technology that makes this possible, a bagging dewatering treatment method has been developed in the past, in which mud soil with a high water content is poured into a bag made of woven fabric or the like and dehydrated, and used as embankment or buried soil. The bags used in this bagging and dewatering method can ensure the filter performance suitable for the dewatering without leaking the injected mud.

  When revetment of rivers with greening, etc., it is considered to use a dewatering bag with filter performance as described above, and to form a vegetation revetment by putting fertilizer and seeds together with mud accumulated in the river However, the opening of the bag is too small, and the roots and stems of the plant are difficult to penetrate the bag, and it is often difficult to grow the plant.

  There exists what was disclosed by patent document 3 as a vegetation dehydration bag which solves such a subject. This dewatering bag consists of a non-corrosive fiber part and a corrosive fiber part. If the high moisture content mud soil is packed and dehydrated and left to stand, the corrosion of the corrosive fiber part proceeds. Since the large opening is formed in the bag, the plant grows from the opening and stable vegetation can be achieved.

JP-A-56-9525 Japanese Utility Model Publication No. 62-19710 Japanese Patent Laid-Open No. 10-18261

  However, the corrosive fiber, which is the material of the vegetable dewatering bag described in Patent Document 3, is generally higher in cost than polyester fiber and the like, and is slightly lower in strength than polyester fiber of the same thickness. There are many cases. Therefore, in order to ensure the required strength, it is necessary to increase the amount of yarn used, which is further disadvantageous in terms of cost. In addition, as the corrosive fiber part is corroded, a large opening is formed, so that the vegetation base material such as soil that is held in the bag and grows the plant is used for rainfall and river inundation. There is also a risk that it will flow out before stable vegetation is formed.

  The present invention is a vegetation dewatering bag that can be produced at low cost without using corrosive fibers, in view of the above circumstances, and prevents the growth of plants and suppresses the outflow of vegetation base materials. It aims at providing the dehydration bag for vegetation which can be.

Means and effects for solving the problems

  The present invention relates to a vegetation dewatering bag used for dehydration of mud and formation of vegetation. And the dehydration bag for vegetation concerning the present invention has the following some features in order to achieve the above-mentioned object. That is, the dehydration bag for vegetation according to the present invention includes the following features alone or in combination as appropriate.

In order to achieve the above object, the first feature of the dewatering bag for vegetation according to the present invention is a bag for injecting mud soil with a high water content ratio to perform bagging and dewatering, and comprises a fabric having water permeability. A bag having an inlet for injecting the mud into the interior, and provided along the outer surface of the bag, so that the vegetation material can be accommodated therein and is open to the outside. A pocket portion having an opening portion, wherein at least a portion of the pocket portion is formed of a stretchable mesh material knitted from Russell, and a plant that grows from the vegetation material accommodated in the pocket portion is provided. , Ri can der to grow through the mesh of the net-like material of the pocket portion is further provided with a cover member disposed so as to cover the pocket portion on the outside of the pocket portion.

According to this structure, the accommodation space of the bag body which is a bag which inject | pours mud with high water content ratio, and the accommodation space of the pocket part with the part which accommodates a plant are formed separately. The bag body is dehydrated by passing water contained in the injected mud soil to the outside, and holds the vegetation base material such as soil remaining in the bag body. Therefore, it becomes possible to suppress the outflow of the vegetation base material in the bag due to rainfall or river flooding. Moreover, the plant contained in the vegetation material accommodated in the pocket part grows through the pocket part. Therefore, the growth of the plant is hardly hindered and the vegetation efficiency is improved. Further, by providing the pocket portion in a state along the outer surface, it is possible to easily perform an operation of filling the pocket portion with a vegetation material. Furthermore, when the vegetation dewatering bags are stacked and installed on a river revetment, etc., the roots of the plant enter and grow in other adjacent vegetation dewatering bags, making it easier for the bags to be integrated. In addition, the vegetation dewatering bags can be prevented from shifting in the stacked state, and a stable vegetation board can be constructed. Moreover, since it can produce without using corrosive fiber, production cost can be reduced.
Furthermore, since the opening part of a pocket part expands and spreads, it becomes easy to pack vegetation material. Moreover, since the plant in a pocket part can penetrate through the opening part of a mesh-like material, it becomes difficult to prevent growth. In addition, because the stretchability of the net-like material makes it possible to easily spread the opening portion, it becomes difficult to prevent the plant that has grown through the opening portion from growing further in the direction of expanding the opening portion. .
In addition, since a cover member is provided on the outside of the pocket portion so as to cover the pocket portion, even if the vegetation dewatering bag is installed on the waterside such as a river revetment, the river is directly in the pocket portion. Therefore, it is possible to prevent the pocket portion from being damaged by driftwood or the like, and to prevent the slope of the formed vegetation portion from being scraped by the action of running water.

  Moreover, the 2nd characteristic in the dehydration bag for vegetation concerning this invention is that the said pocket part is formed by attaching a sheet-like member along the outer surface of the said bag body.

  According to this structure, the storage space of a pocket part is formed with a bag body outer surface and a sheet-like member, and the structure of the dehydration bag for vegetation becomes simple. Therefore, it becomes possible to easily produce a dehydration bag for vegetation. Moreover, by forming the pocket portion using a sheet-like member that is a separate member from the bag body, the range of selection of the structure of the pocket portion is widened, and a structure more suitable for vegetation can be easily added. Become.

The third feature of the vegetation dewatering bag according to the present invention is that the pocket portion is formed at one end portion of the bag body, and the opening portion opens toward the other end side of the bag body. Is that it is provided

  According to this configuration, when stacking the vegetation dewatering bags, a uniform slope can be obtained without hindering the growth of the plant from the pocket portion by stacking it so that the end portion provided with the pocket portion is exposed. Can be easily formed. Further, by stacking so that only the pocket portions are exposed, the bag bodies other than the uppermost stage are not directly affected by ultraviolet rays or the like from the outside, and the deterioration of the bag bodies can be prevented. Accordingly, it is possible to considerably omit work such as covering soil for preventing deterioration due to ultraviolet rays or the like, and to shorten the construction process.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. Here, the case where a vegetation revetment is created on a river revetment using the present invention will be described.

  FIG. 1 is a view showing a vegetation dewatering bag 1 according to an embodiment of the present invention. The dehydrating bag 1 for vegetation includes a bag body 2 formed by closing both ends of a cylindrical woven fabric (fabric) having water permeability by sewing, and a pocket portion 7 provided at one end of the bag body 2 that is closed. And. The pocket portion 7 is formed by a sheet-like member 3 attached along the outer surface of the bag body 2, and a vegetation material is provided in an accommodation space between the sheet-like member 3 and the outer surface of the bag body 2 through the opening 3 b. Can be accommodated. Here, the vegetation material refers to a material including a plant that grows and forms vegetation such as plant seeds, seedlings, and rhizomes, and is a mixture of the plant and soil, fertilizer, etc., or a small seedling and soil. Also included in small bags. Moreover, the cylindrical injection port 5 is attached to the upper surface of the bag body 2 so that vegetation base materials, such as mud, can be inject | poured into the bag body 2, A rod-shaped hanging tool is attached to the closed both ends. Is formed by a fibrous belt or the like. The vegetation dewatering bag 1 further includes a cover member 4 attached so as to cover the outer surface of the sheet-like member 3.

The bag body 2 is made of, for example, a tubular woven fabric having a diameter of 1.1 m, a length of 2.5 m, and a basis weight of 527 g / m ² woven with polyester fiber warp (1100 T / 2) and weft (1100 T / 4). , Those having an internal volume of 1.3 m ³ and a pressure resistance of 0.1 MPa can be used. When mud is poured into the bag body 2, the bag body 2 expands to a flat shape with a height of about 800 mm. The opening of the bag body 2 is so small that it cannot be measured with calipers or the like, and only the water contained in the injected mud with a high water content ratio can pass through the fabric, and the mud mud is left in the bag body 2. It is possible to dewater the mud by injecting and leaving it. In addition, the cylindrical woven fabric can be produced easily by overlapping two woven fabrics and sewing the edge portion into a cylindrical shape. Moreover, it is also possible to use a cylindrical woven fabric having a plurality of parallel warps and wefts continuously woven in a spiral shape with respect to the warps. In this case, since the tubular woven fabric has a high breaking pressure, it does not break easily even if the mud is pressurized and expanded by injection means such as a pump, and a large-scale construction using a pump or the like. It is suitable when performing. Moreover, when closing both ends of the tubular woven fabric, it is possible to prevent the mud in the bag body 2 from flowing out from the sewing gap by sewing with both ends folded.

  FIG. 2 is a schematic view of the injection port 5 attached to the upper surface of the bag body 2. As the injection port 5, a different-diameter tubular woven fabric having a small-diameter portion 5 a and a large-diameter portion 5 b that is a portion extending from the small-diameter portion 5 a while expanding in diameter can be used. As this different diameter tubular woven fabric, for example, a polyester fiber having a small diameter portion 5a having a diameter of 160 mm and a large diameter portion 5b having a connecting side end having a diameter of 290 mm can be used. The injection port 5 is formed by sewing the end portion 5c of the large diameter portion 5b to the hole peripheral portion 2c of the bag body 2 so that the injection hole formed in the bag body 2 and the cylindrical hole of the injection port 5 are continuous. And attached to the bag body 2. The injection port 5 can be attached not only by sewing but also by adhesion with an adhesive. By attaching in this way, the flow of mud at the time of pouring is less likely to be biased, and the entire bag body 2 can be uniformly filled with mud. Further, the end of the injection port 5 on the side of the small diameter portion 5a is designed to protrude about 300 mm from the surface of the bag body 2, and a hose 50 for injecting mud can be attached to the small diameter portion 5a. Work can be performed efficiently.

  FIG. 3 is a cross-sectional view illustrating a method for attaching the sheet-like member 3 and the cover member 4 of the vegetation dewatering bag 1. FIG. 4 is a plan view when the sheet-like member 3 is attached to the bag body 2. The sheet-like member 3 and the cover member 4 are attached so as to cover the one end 2a side of the bag body 2 whose end portions 2a and 2b are closed by sewing (see FIG. 3). The sheet-like member 3 is fixed to the bag body 2 by sewing, bonding or the like other than one side (one side to be the opening 3b) located on the center side of the bag body 2 and the other. A pocket portion 7 having an opening 3b facing the end 2b is formed. Similarly, the cover member 4 is also fixed to the bag body 2 by sewing, bonding, or the like other than one side on the center side of the bag body 2. In addition, the sheet-like member 3 is not limited to the case where only the edge portion 3a is fixed as described above, and the sheet-like member 3 is firmly fixed while holding a space capable of accommodating vegetation material by fixing a part of the center of the sheet. Is also possible. Further, the vegetation material may not be filled in the pocket portion 7 to the limit of the capacity that can be accommodated in the pocket portion 7. (2) A hook-and-loop fastener that can be attached to the surface is provided and the opening 3b of the pocket portion 7 is closed so that the vegetation material in the pocket portion 7 is prevented from falling off and held in a stable state. Can do. Moreover, the cover member 4 should just be fixed so that the sheet-like member 3 may be covered, and a fixing position is not limited as mentioned above. In addition, the size of the pocket portion 7 can be appropriately changed according to the installation state of the vegetation dehydration bag 1, and the sheet can be effectively covered so as to cover the portion exposed when the vegetation dehydration bag 1 is installed. The size of the shaped member 3 and the cover member 4 is changed.

  As the sheet-like member 3 forming the pocket portion 7, for example, a net-like sheet material made of polyester fiber made of Russell knitting and having an opening of about 5 mm can be used. In this case, because of the raschel knitting, the structure is better than the plain weave sheet material, and the stretchability is better, so that the opening can be further expanded, and the penetrating stalk can grow thick. is there. The width of the sheet-like member 3 (the length in the circumferential direction of the bag) is such that there is an accommodation space in which vegetation material can be accommodated even after mud is injected into the bag 2 and the bag is expanded. , Is set to a length with room. The length of the sheet-like member 3 in the bag body axial direction can be 700 mm, for example. The length is desirably a length that allows only the portion to which the sheet-like member 3 is attached to be exposed when the vegetation dewatering bags 1 are stacked along the slope of the river revetment. In addition, as the sheet-like member 3, a material in which a hole is formed in a sheet material having a considerably small opening (for example, 1 mm or less) and at least a plurality of holes larger than the opening (for example, about 5 mm) is used. It is also possible.

  As the cover member 4, for example, a lattice-like sheet material that is more rigid than the sheet-like member 3 and has a large opening can be used. A polyester fiber geogrid is suitable as one of such materials.

  The dehydration bag 1 for vegetation configured as described above is configured such that, after a vegetation material such as fertilizer including a reed stem is stored in the pocket portion 7, a pump injection hose 50 is banded to the injection port 5 of the bag body 2. It is fixed by a fastening means such as a river, and the dredged soil of the river (mud with high water content) is filled in the bag body 2 (see FIG. 2), and the filled dredged soil is dehydrated. If the amount of dredged soil is small, soil may be prepared separately from dredged soil, and adjusted for water addition. In addition, when using a small bag containing small seedlings or the like as a vegetation material, it is considered that the small bag moves in the pocket portion 7, and therefore, a non-slip sheet material (for example, a coconut shell sheet) in the pocket portion 7 ) And put a sachet on top of it to prevent slipping, and the position will not shift significantly. Moreover, according to the thickness of the stalk of a seedling, the sheet-like member 3 is appropriately subjected to hole processing or the like to adjust the opening, thereby ensuring a state in which the stalk is likely to grow. Thereafter, the vegetation dewatering bag 1 is lifted by a crane using four hanging portions 6 formed at the end of the bag body 2 and is transported and stacked on the river bank. In addition, the dewatering of the dredged soil in the bag body 2 is not limited to the case of being performed before the installation on the river revetment or the like, but can also be performed after being installed on the river revetment in a state containing moisture.

  In FIG. 5, sectional drawing of the dehydration bag 1 for vegetation in the state installed in piles is shown. The dehydration bag 1 for vegetation is stacked in such a manner that the end 2b where the pocket portion 7 is not formed is stacked along the inclined surface of the river revetment 100 while the clay 10 is held in the bag body 2. 2 is installed with the sheet-like member 3 and the cover member 4 provided at the other end exposed. The plant contained in the vegetation material 11 accommodated in the pocket portion 7 grows through the sheet-like member 3 and the cover member 4 and forms vegetation on the exposed surface of the dehydration bag 1 for vegetation.

  FIG. 6 shows a cross-sectional view of the entire slope formed by stacking the vegetation dewatering bags 1 on the river revetment 100. 7 and 8 are a plan view and a front view of the slope, respectively. 6 is a cross-sectional view taken along the line XX in the front view of FIG.

  The vegetation dewatering bag 1 is laminated on the ground solidified by a backfill material 102 such as chestnut and crushed stone, and the gap between the vegetation dewatering bag 1 and the river revetment 100 is formed by a backfill material 103 such as sand. Filled. The exposed portion of the bag body 2 at the uppermost end of the stacked vegetation dewatering bags 1 is covered with soil 104. In the flow direction of the river 101, the vegetation dewatering bags 1 are arranged adjacent to each other (see FIG. 7), and a small-mouth block 105 is installed at both ends of the slope formed by them. This prevents misalignment. As shown in FIG. 5, the portion exposed to the river 101 side on the slope is formed in the order of the cover member 4, the sheet-like member 3, and the bag body 2 from the river 101 side. Does not directly act on the bag body 2.

  The vegetation dewatering bag 1 according to the present embodiment can be manufactured at a low cost without using corrosive fibers by having the above-described configuration.

  Moreover, the water contained in the mud with a high water content injected into the bag body 2 passes through to the outside, the mud is dehydrated, and the soil remaining in the bag body 2 is held without flowing out. Therefore, it is possible to prevent the soil in the bag body 2 from flowing out due to rainfall, flooding of the river, and the like after being installed on the river bank.

  Moreover, since the plant accommodated in the pocket part 7 grows outside from an opening part, the growth of the said plant is hard to be prevented and vegetation efficiency improves. In addition, since the sheet-like member 3 forming the pocket portion 7 is formed of a stretchable mesh material, the sheet-like member 3 can be easily stretched and packed with vegetation material. Can be easily spread out, so that it is difficult to inhibit the growth of a plant stalk or the like extending through the opening portion. Moreover, since the opening of the pocket part 7 does not change with the passage of time, it can be used even when plants with different growth rates are used.

  Further, the pocket portion 7 can be formed by attaching the sheet-like member 3 along the bag body 2 and can be easily manufactured. The space in the pocket portion 7 and the space in the bag body 2 form the bag body 2. Since it is divided only by the material to do, the root of the plant in the pocket part 7, etc. become easy to approach also into the bag body 2, and vegetation efficiency improves more. Further, by forming the pocket portion 7 using the sheet-like member 3 which is a separate member from the bag body 2, a structure suitable for vegetation such as an opening portion that can be easily opened with little deformation resistance is dehydrated. Can be easily added to the bag.

  Furthermore, because the stalks and roots of the plants enter and grow into other vegetation dewatering bags installed in a stack, and each bag becomes easy to integrate, the displacement of each vegetation dewatering bag in the stacked state Can be suppressed. In addition, the pocket portion 7 is formed integrally with the bag body 2 and, unlike the case where the vegetation material and the bag for dehydrating the vegetation base material are stacked separately, the vegetation portion is formed after construction. It is easy to maintain the landscape without falling off.

  Moreover, when the pocket part 7 is formed in the one end part of the bag body 2, and it provides so that the opening part 3b may open toward the other end side of the bag body 2, when laminating | stacking the dehydration bag 1 for vegetation, By stacking so that the end provided with the pocket portion 7 is exposed (see FIG. 5), a uniform sloped vegetation portion can be easily formed without disturbing the growth of the plant from the pocket portion 7. Can be formed. Further, by stacking so that only the pocket portion 7 is exposed, the bag body 2 is not directly affected by ultraviolet rays or the like from the outside, and the bag body 2 can be prevented from being deteriorated. Therefore, the vegetation mat or soil covering operation performed for improving the weather resistance may be performed only on the uppermost end 104 (see FIG. 6) of the stacked vegetation dewatering bag 1, and the process can be shortened. Is possible.

  Further, the cover member 4 disposed so as to cover the pocket portion 7 outside the pocket portion 7 allows the vegetation dewatering bag 1 to be directly installed in the pocket portion 7 even if the dewatering bag 1 for vegetation is installed in a place where river water flows. Therefore, the pocket portion 7 can be prevented from being damaged by driftwood or the like, and the formed vegetation portion can be prevented from being scraped by the action of running water.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

It is a figure which shows the dehydration bag for vegetation concerning the embodiment of the present invention. It is a schematic diagram of the inlet of the dehydration bag for vegetation shown in FIG. It is sectional drawing explaining the attachment method of the pocket part of the dehydration bag for vegetation shown in FIG. It is a top view explaining the attachment method of the pocket part of the dehydration bag for vegetation shown in FIG. It is a detailed sectional view showing the installation state of the dehydration bag for vegetation according to the embodiment. It is sectional drawing of the example of construction of the dehydration bag for vegetation concerning an embodiment. It is a top view of the construction example of the dehydration bag for vegetation concerning an embodiment. It is a front view of the construction example of the dehydration bag for vegetation concerning an embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dehydration bag for vegetation 2 Bag body 3 Sheet-like member 3b Opening part 4 Cover member 5 Inlet 7 Pocket part 10 Mud soil 11 Vegetation material 100 River revetment 101 River

Claims (3)

A bag for injecting mud with a high water content and performing bagging and dehydration,
A bag made of a fabric having water permeability, and having an inlet for injecting the mud into the interior;
A pocket portion provided along the outer surface of the bag body, capable of containing a vegetation material inside, and having an opening portion formed to be in an open state outside;
At least a part of the pocket portion is formed of a stretchable mesh material of raschel knitting,
Plants growing from said vegetation material contained within the pocket portion, Ri can der to grow through the mesh of the net-like material of the pocket portion,
A vegetation dewatering bag , further comprising a cover member disposed outside the pocket portion so as to cover the pocket portion .   The dehydrating bag for vegetation according to claim 1, wherein the pocket portion is formed by attaching a sheet-like member along the outer surface of the bag body. The said pocket part is formed in the one end part of the said bag body, and the said opening part is provided so that it may open toward the other end side of the said bag body, The Claim 1 or 2 characterized by the above-mentioned. Dehydration bag for vegetation.

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