JP4436777B2 - Vegetation mat and slope protection method for introduction of surrounding plants - Google Patents

Description

  The present invention relates to a vegetation mat and a slope protection method for introducing surrounding plants used for, for example, slope planting.

  Conventionally, a vegetation mat for slope planting is made by attaching a base material bag containing a water retention material, soil improvement material, fertilizer, seeds, etc. at a proper place on the net. By laying the vegetation mat on the slope, the plants sprouted from the seeds can immediately grow and the early slope can be greened. And the greening of the slope using this vegetation mat not only greens the slope, but also protects the slope by preventing erosion and freezing on the slope.

However, since plants that grow early are often different from the surrounding plants on the site, in recent years, there are concerns about the effects of plants that have grown by the introduction of vegetation mats on the local ecosystem. Therefore, in Patent Document 1, when artificial soil containing plant seeds is arranged on a slope, a plurality of mountain-shaped rows made of the artificial soil are formed, and a flat surface is formed between the mountain-shaped portions. It is described that the vegetation mat is arranged so as to provide a portion. Thus, it is said that the growth of the seeds flying to the flat part can be promoted by the natural growth of the native species without being inhibited by the plants growing from the seeds contained in the mat.
JP 2000-160561 A

  However, when the invention of Patent Document 1 is used, if the seeds of the plants that have come to the flat part remain on the net, there is a possibility of germination, but there is a possibility that the seed will be easily blown off by the wind or the like. There was a problem that there was little possibility of germination. Fortunately, plants that have come to the flat part may grow, but even if seeds that fall on the mountainous part can germinate, they can grow by being hindered by the growth of the plant contained in the artificial soil. It may disappear.

  On the other hand, if the area occupied by artificial soil including plant seeds is reduced in order to allow the surrounding plants to grow without being pressured, there is a problem that the slope cannot be sufficiently protected. In other words, when the rain hits a slope where no artificial soil was formed, the slope was eroded, or when the soil was frozen up in the winter, the surface layer was lifted and the soil was washed away. For this reason, even if a surrounding plant falls, there may be a problem that it does not lead to greening.

  The present invention has been made in consideration of the above-described matters, and the purpose thereof is to efficiently capture surrounding plants and to achieve greening by local plants by allowing seeds of the captured plants to flourish. Another object is to provide a vegetation mat and a slope protection method for introducing surrounding plants that can protect the slope.

  In order to achieve the above object, a vegetation mat for introducing a peripheral plant according to the present invention includes a first net disposed on a slope and a first net in a state of being superimposed on the first net. A second net connected to the fertilizer bag, and a fertilizer bag accommodated in an accommodating portion formed laterally between the two nets in a state of installation on the slope, and a thin cotton attached to the first net, A pocket for capturing seeds of surrounding plants is formed in the portion of the accommodation portion by making the mesh of the second net of the portion constituting the accommodation portion dense (Claim 1). . It is desirable that the fertilizer contained in the fertilizer bag is a super slow-acting fertilizer that slowly supplies nutrients over a long period of several months or more.

  The thin cotton means not a thin cotton but a thin cotton. In addition, it is desirable that the thin cotton has sufficient corrosion resistance and water absorption by mixing fibers made of two or more materials having different decomposition rates so that the slope can be protected over a long period of time. However, thin cotton is ultimately broken down by microorganisms. Rayon and palm fibers can be used as water-absorbing fibers, and examples of corrosion-resistant fibers include biodegradable plastics such as polylactic acid fibers, animal fibers, plant fibers such as palm fibers and bamboo fibers. Fiber, metal fiber, etc. can be used.

  The fibers constituting the first net may be thicker than the fibers constituting the second net (claim 2). The fibers constituting the first net are, for example, wide fibers such as flat yarns, and the fibers constituting the second net are, for example, a thin thread-like shape compared to the first net while having sufficient strength by knitting monofilaments. Can be.

  Seeds of a plant that is housed in a housing portion formed laterally between both nets located on the valley side of the fertilizer bag in a state where it is installed on the slope, and does not adversely affect the ecosystem of surrounding plants at least And a sufficient seed capturing area for capturing and collecting the seeds of surrounding plants may be provided in a portion located on the mountain side of the fertilizer bag (claim). 3).

  In the slope protection method of the present invention, the vegetation mat for introducing the surrounding plant is fixed to the slope so that the thin cotton comes into contact with the slope and the fertilizer bag is arranged in a contour line. The second net is arranged in a state where it floats from the slope (claim 4).

  In the vegetation mat for introducing a peripheral plant according to claim 1, since the thin cotton is attached to the first net, the thin cotton is brought into close contact with the slope after construction, and rain wind does not directly hit the slope. Can be. Moreover, since water retention and heat retention can be performed with thin cotton, erosion and freezing of the surface soil can be prevented.

  The seeds of plants that have come or fallen first fall on the second net to decrease the fall speed, and can hit the first net or thin cotton to stay on the surface of the slope. Since the 2nd net is arranged so that it may be located in the upper part of the 1st net, it is buffered when the wind from the outside hits the 2nd net, and it becomes difficult to blow off the seed which remained on the surface of the slope. In addition, the seeds of plants that have fallen on the thin cotton can be prevented from being easily detached from the thin cotton by being entangled with the thin cotton.

  Furthermore, it is conceivable that seeds that are easy to roll, such as acorns, roll on thin cotton or the first net, but in such cases, the seeds are captured by the pockets formed in the storage part. Can be germinated. In addition, it is desirable that the meshes of the second nets constituting the pockets are formed with finer meshes than these seeds so that the seeds of the surrounding plants can be reliably captured.

  And since the seed trapped in the pocket can obtain nutrients from the fertilizer bag, the seed of this plant can be reliably grown. Even if the fertilizer bag does not supply a large amount of nutrients, sufficient nutrients can be supplied to the seeds captured in the pockets directly above the fertilizer bag. Rather, it is desirable that the fertilizer contained in the fertilizer bag is a very slow-acting fertilizer that slowly supplies nutrients over a long period of several months or more, which may cause unwanted wild grasses such as black-tailed hawks to overgrow or run out excessively. It can prevent the nutrients that cause water pollution.

  The thin cotton is mixed with two or more kinds of fibers having different decomposition rates so that the slope can be protected over a long period of time so that the thin cotton has sufficient corrosion resistance and water absorption. Even if it passes for more than a year, it cannot be decomposed | disassembled completely and the surrounding seed which fell or flew can be captured over a long period of time. Thin cotton also protects the surface soil of the slope from runoff by rainwater and frost heave in winter until the seeds entangled with the slope are fully rooted, and provides moisture necessary for seed germination and growth. Can keep. And this thin cotton is finally decomposed by microorganisms into nutrients.

  If the fibers constituting the first net are thicker than the fibers constituting the second net (Claim 2), the thicker the fibers constituting the first net, the more the eyes of the first net The mesh can be made denser than the mesh of the second net. Thereby, falling or flying seeds can easily pass through the meshes of the second net. On the other hand, rainwater or the like can be easily decelerated by hitting the first net made of thicker fibers like a flat yarn, and the slope can be protected accordingly.

  Further, by changing the form of the fibers constituting the net, such as by forming the second net with monofilaments and the first net with flat yarns, or by using fibers of different materials, the fibers constituting the second net are changed to the first. It is desirable that the heat shrinkage rate is higher than that of the fibers constituting the net. In other words, the second net can be contracted by heating the first net and the second net connected to the first net when the thin cotton is attached, and the slack is such that the first net is in close contact with the slope. In this state, sufficient tension can be applied to the second net and the upper part of the first net can be positioned. In addition, the second net can be contracted using solar heat after construction. That is, a three-dimensional double net structure including the second net and the first net can be ensured. Furthermore, by forming the second net by monofilament knitting, the second net can be formed thinner than the first net while having sufficient strength.

  Seeds of a plant that is housed in a housing portion formed laterally between both nets located on the valley side of the fertilizer bag in a state where it is installed on the slope, and does not adversely affect the ecosystem of surrounding plants at least And a sufficient seed capturing area for capturing and collecting the seeds of surrounding plants is provided in a portion located on the mountain side of the fertilizer bag (Claim 3). ), The slope can be partially greened by the seeds in the base material bag at an early stage after the vegetation mat for introducing the surrounding plants is laid, while the surrounding plant can be planted. Since the base material bag is arranged so as to be located on the valley side of the fertilizer bag, the nutrients supplied by the fertilizer bag can be supplied to the peripheral seeds captured in the pocket. Furthermore, since the seed capturing region is formed on the mountain side of the fertilizer bag, surrounding seeds can be captured efficiently, and seeds that could not be captured can be captured by introducing them into the pocket.

  According to the slope protection method of claim 4, this slope can be obtained by preventing the erosion and frost heaving of the slope by sticking the thin cotton attached to the vegetation mat for introducing the surrounding plant to the slope. Can be protected. In addition, it is possible to prepare an environment in which peripheral seeds flying or falling on a protected slope are likely to grow. In particular, the pockets arranged in a contour line are used to introduce and capture surrounding plants inside, and the germination and growth of the seeds of the surrounding plants captured in the pocket can be supported by the fertilizer in the fertilizer bag.

  In addition, because the vegetation mat is fixed to the slope, when the second net contracts due to solar heat, the second net is tensioned, and the vegetation mat is placed in a state of being surely lifted from the slope by the thickness of the fertilizer bag. can do. And since the 2nd net arrange | positioned in the state floated above the 1st net also functions as a wind avoidance, the seed entangled with the 1st net or the thin cotton is prevented from being blown away by the wind. be able to.

  1-5 is a figure which shows the vegetation mat 1 for the surrounding plant introduction of a present Example, Comprising: FIG. 1 is a longitudinal cross-sectional view which shows the structure and construction state of the said vegetation mat 1, FIG. 3 is an exploded perspective view of the net body 1a of FIG. 3, FIG. 3 is an enlarged view showing the configuration of the vegetation mat 1, FIG. 4 is a diagram for explaining a construction method using the vegetation mat 1, and FIG. It is a figure which shows one state.

  The vegetation mat 1 according to the present embodiment includes, for example, a first net 2 disposed on the slope N and a second net connected to the first net 2 in a state of being superimposed on the first net 2. An intermediate closing thread B for connecting the net 3 and the warp yarns 2a, 3a (details will be described later) of the nets 2, 3 to each other at an appropriate interval, and a portion that is not closed by the intermediate closing thread B are provided. It has the fertilizer bag 5 accommodated in the accommodating part 4 formed in the middle, the base material bag 7 accommodated in another accommodating part 6, and the thin cotton 8 attached to the lower surface of a 1st net | network.

  As shown in FIG. 2, the first net 2 is knitted with a weft 2a made of flat yarn made of, for example, polyethylene (PE) -based synthetic resin, and a monofilament made of, for example, PE-based synthetic resin, which goes directly to the weft 2a. The weft yarn 2a is formed by weaving between the warp yarns 2b in a zigzag manner. The scale 2c has a size that is somewhat larger than the seeds of the surrounding plants that fly or fall (hereinafter referred to as flying seeds or falling seeds).

  On the other hand, the second net 3 is obtained by chain-knitting, for example, a weft 3a formed by chain-knitting a monofilament made of PE-based synthetic resin, and a monofilament made of, for example, PE-based synthetic resin, which goes straight to the weft 3a. In this embodiment, the warp yarns 2b and 3b are connected by an intermediate closing yarn B so that the second net 3 is positioned at a predetermined height above the first net 2. be able to. The wefts 3a may be formed by knitting between the warp yarns 3b perpendicular to the wefts 3a so as to advance in a zigzag manner. Since the monofilament constituting the weft 3a is a finer fiber than the flat yarn constituting the weft 2a, the mesh 3c can be made larger than the mesh 2c of the first net 2.

  Further, in the second net 3, a part of the housing part 4, that is, the second net 3 constituting the housing part 4 or the second net 3 including the periphery of the housing part 4 or a part of the housing part 4. The mesh 3c ′ of the 2 net 3 is densely formed so as to be smaller than the seeds of the surrounding plants, and the pocket 9 for capturing the seeds in the densely formed portion of the mesh 3c ′. Is forming. In addition, the second net 3 located on the mountain side of the pocket 9 portion at the time of construction forms a seed capturing region 10 having a sufficient area for capturing the seeds of surrounding plants and at least capturing and collecting the seeds. ing.

  The mesh 3c of the second net 3 configured as described above can easily allow the flying seeds or falling seeds to pass through the seed catching region 10, and the flying seeds or falling seeds hit the second net 3. The size is such that it can function as a windbreak to some extent while slowing the speed of seed movement. Further, the mesh 3c 'of the second net 3 in the pocket 9 portion is formed so dense that seeds housed therein are not easily washed away.

  Further, as shown in FIG. 3, the intermediate closing thread B is formed in the net body 1a having a double net structure by connecting the warps 2b and 3b at an appropriate interval (for example, one interval). ing. In addition, the accommodating portions 4 and 6 are formed by leaving a portion where the middle closing yarn B does not connect the warp yarns 2b and 3b in the lateral direction. Further, not only the fertilizer bag 5 is inserted into the housing part 4 but also the pocket 9 is formed, so that it is formed larger than the housing part 6.

  The fertilizer bag 5 is accommodated in the accommodating portion 4, whereby the vegetation mat 1 can supply nutrients to flying seeds or fallen seeds accommodated in the pockets 9. In addition, the fertilizer bag 5 has, for example, at least several months to several years of nutrients that are gradually dissolved in the plant in the pocket 9 in a bag 5a made of a corrosion-resistant nonwoven fabric (in this example, 3 to 3). 5 years), which contains a very slow-acting fertilizer 5b supplied over a long period of fertilization. In addition, a water retention material, a soil improvement agent, and the like may be included in the bag 5a. In addition, since the said accommodating part 4 is formed sufficiently large compared with the fertilizer bag 5, in the state which inserted the fertilizer bag 5 in the accommodating part 4, a flying seed or fall in the accommodating part 4 in the upper part of the fertilizer bag 5 A seed pocket 9 is formed.

  On the other hand, the said base material bag 7 is accommodated in the accommodating part 6, and the said vegetation mat 1 greens a slope in the early stage after construction by providing the base material bag 7. FIG. The base material bag 7 contains, in a bag 7a made of a corrosion-resistant non-woven fabric, for example, seeds 7b of plants that do not adversely affect the ecosystem of surrounding plants, in addition to water retention materials, soil conditioners, and fertilizers. It becomes. Plant seeds that do not adversely affect the ecosystem of surrounding plants include, for example, herbaceous species such as perennial ryegrass and Italian grass, wild grass species such as Susuki, Medhagi, mugwort, pioneer such as Nurde, Akamegashiwa, Yashabushi, Nemunoki It is the seed of a sex plant. It is preferable to employ annual grasses or short-lived grasses such as the above-mentioned 2 species as pasture species because the grass species have a fast decline period and do not inhibit the growth of surrounding plants. Introducing the above-mentioned pioneer plants is preferable because the speed of vegetation transition increases and vegetation similar to surrounding vegetation can be restored earlier.

  The thin cotton 8 has such flexibility that it can be easily adhered to the uneven slope N, and is, for example, heat-sealed or adhered to the lower surface of the net body 1a (particularly the first net 2) having the double net structure. A water retaining material, a soil conditioner, a fertilizer, and the like are bonded to each other. In addition, since the heat shrinkage rate of the 1st net | network 2 and the 2nd net | network 3 differs by applying heat to the mesh body main body 1a when attaching the above-mentioned water retention material etc., it is 2nd compared with the 1st net | network 2. Net 3 contracts greatly. This is because the monofilament composing the second net 3 is manufactured by the extrusion forming process, whereas the flat yarn composing the first net 2 is formed by stretching while applying heat. It is thought that.

  Moreover, the said thin cotton 8 is what does not decompose | disassemble completely even if one year or more passes after construction, and prevents rain wind from hitting a slope directly for at least several months or more. Further, the thin cotton 8 is a mixture of two or more kinds of fibers having different decomposition rates and has sufficient corrosion resistance and water absorption. The thin cotton 8 in the present embodiment is made of rayon as an example of a fiber excellent in water absorption, and a fiber made of a biodegradable plastic material such as polylactic acid fiber (for example, trade name: “Lactron”) as a fiber having corrosion resistance. ).

  Both rayon and polylactic acid fiber are preferable because they are finally completely decomposed by microorganisms. However, it goes without saying that the fibers constituting the thin cotton 8 are not limited to rayon or polylactic acid fibers. That is, the water-absorbing fiber can be not only rayon but also various fibers such as palm fiber. As the corrosion-resistant fiber, biodegradable plastics other than polylactic acid fiber can be used. Animal fibers such as palm fibers or strong plant fibers such as palm fibers or bamboo fibers may be used. Furthermore, it is also possible to use metal fibers and the like.

  The thin cotton 8 is used for trapping and capturing the flying seeds and falling seeds in the fiber, and securing water necessary for germination and growth of the seeds. Further, if the thin cotton 8 has sufficient durability and water absorption, the surface soil of the slope N can be protected from erosion by rain and wind, and can be protected from freezing in winter.

  The vegetation mat 1 is laid on the slope N as shown in FIG. That is, the vertical direction of the vegetation mat 1 is determined so that the vegetation bag 7 comes to the valley side of the fertilizer bag 5, and the fertilizer bag 5 and the vegetation bag 7 are formed in a contour line shape. The uppermost fertilizer bag 5 or vegetation bag 7 is fixed by an anchor 20.

  Next, the vegetation mat 1 is sequentially spread downward, and the vegetation mat 1 is struck against the slope N by the sub-anchor 21 and the nail 22 at the position of the fertilizer bag 5 or the vegetation bag 7 and fixed. At this time, by laying the vegetation mat 1 so as to apply some tension to the second net 3, the second net 3 is slightly lifted from the slope N by the diameter of the fertilizer bag 5 and the vegetation bag 7. Retained. In this embodiment, the fertilizer bag 5 and the vegetation bag 7 have a diameter of 2 to 3 cm, and a space of 2 to 3 cm is formed between the first net 2 and the second net 3. . At this time, since the second net 3 is slightly contracted as compared to the first net 2, the first net 2 can be slightly slackened even when tension is applied to the second net 3, 1 net 2 can follow the slope N.

  By laying the vegetation mat 1 by the slope protection method shown in FIG. 4, the thin cotton 8 can be brought into close contact with the slope N to prevent erosion and frost heaving of the surface soil, as well as flying seeds and falling A sufficiently large seed capturing area 10 for capturing seeds can be secured. After the construction, the seed 7b in the base material bag 7 can be germinated at an early stage, whereby the slope N can be greened, and the slope N can be stabilized by stretching the roots of the plant. . In addition, the slope N can be planted using flying seeds or falling seeds.

  Here, with reference to FIG. 1, consider the case where flying seeds or fallen seeds (hereinafter simply referred to as seeds) 30 fall into the seed capture region 10. The seed 30 falling on the seed catching region 10 first hits the second net 3, so that the dropping speed decreases, hits the first net 2, and stays on the surface of the first net 2.

  At this time, since the mesh 3c of the second net 3 is sufficiently larger than the seed 30, the seed 30 can easily pass through the second net 3. Further, when there is a seed 30 that falls without touching the second net 3, the seed 30 hits this because the mesh 2c of the first net 2 is denser than the mesh 3c of the second net 3. . Then, like the seed indicated by reference numeral 31, the fibers of the thin cotton 8 attached to the back surface of the first net 2 are entangled, and the seed 31 is captured by the thin cotton 8 and stays there.

  The second net 3 and the first net 2 have a scale 3c, 2c that allows the seed 30 to pass therethrough, but the wind shield so that a strong wind does not directly hit the seed 31 captured by the thin cotton 8. Can also function to protect the seed 31. Further, since the thin cotton 8 has water retention, it can supply water necessary for the seed 31 to germinate and grow.

  On the other hand, when the fallen seed 30 is a seed that is easy to roll, such as an acorn, the surface of the first net 2 is rolled by receiving wind from the outside without being entangled with the fibers of the thin cotton 8. Can be considered. However, since the upper part is covered with the second net 3, the seed 30 once dropped is protected from being blown off by the wind, and the seed that has rolled on the surface of the first net 2 moves to the valley side by gravity. . Then, like the seeds indicated by reference numeral 32, they come into contact with the small steps formed by the fertilizer bag 5 and are captured in the pockets 9. In addition, the seed 32 captured in the pocket 9 is covered with a bag shape by the second net 3 in which the mesh 3c 'is formed more densely than the seed, so that the seed 32 is not easily washed away.

  Here, in order to confirm the seed capturing ability of the vegetation mat 1 according to the present invention, the flying seed capturing ability test compared with a conventional vegetation mat with a fertilizer bag (non-stereoscopic double net) and bare ground where nothing is laid. Went. The test conditions are as follows: On slope N with a slope of 1: 1.0, use soil: masa soil, soil hardness: 25 mm, and count the number of seeds captured when plant seeds are dropped from a height of 3 m. , Confirmed its capture status.

  First, when 100 seeds of Arakasi were dropped per test area, 3 conventional vegetation mats with fertilizer bags were captured, and 0 grains were captured in bare land, but 37 vegetation mats according to the present invention had 37 grains. Capture was confirmed. As for the capturing situation at this time, it was confirmed that the capturing by the pocket 9 immediately above the fertilizer bag 5 was the most, and the function of the pocket 9 was functioning effectively.

  Next, when a similar test was performed using 5 g (about 800 grains) of Yamaha seeds per test plot, no capture was confirmed in bare land, but about 50 grains with the conventional fertilizer vegetation mat, the present invention It was confirmed that about 400 seeds were trapped in the vegetation mat 1. In this case, most of the conventional vegetation mats with fertilizer bags were captured only on the stepped portion of the fertilizer bag, but in the vegetation mat 1 of the present invention, the entire mat was captured in a planar shape. As a result. This is because the vegetation mat 1 of the present invention has a three-dimensional structure, so that the falling speed of the seeds is reduced by hitting the first net 2 and the falling direction is dispersed, and the thin cotton 8 is widely captured. Conceivable.

  From the above results, the seed capturing ability of the vegetation mat 1 according to the present invention is about 12 times that of the so-called acorns such as arakashi compared to a conventional vegetation mat with a fertilizer bag, and about 8 even for small seeds such as yamahagi. It was confirmed to have double. This is because it is difficult for the seed to settle on the slope because the falling seed usually collides with the ground. However, since the vegetation mat 1 of the present invention has a three-dimensional structure, the seed that has fallen directly By hitting 1 net 2, the fall speed of the seed is reduced, and after the bounce, the kinetic energy of the seed is absorbed by the first net 2 and the seed can be stored inside the three-dimensional net body 1a. It is thought that there is.

  In addition, since the second net 3 in the present embodiment is formed of a fiber having a high thermal contraction rate such as a monofilament, it is possible to keep the tension applied to the second net 3 by contracting by solar heat in the summer after construction. It is considered possible. That is, the three-dimensional double net structure of the net body 1a can be maintained over a long period of time.

  FIG. 5 is a diagram showing a state of the vegetation mat 1 for introducing neighboring plants at the time when a predetermined period has elapsed after construction. As shown in FIG. 5, the seed 7b in the base material bag 7 is germinated and grown at an early stage after the construction, so that the slope N is greened and the root of the plant is deeply stretched to stabilize the surface soil of the slope N. Can be A soil conditioner is adhered to the thin cotton 8, and in addition to the water retention performance of the thin cotton 8 itself, a water retention material is also adhered, so that the slope N can be made an environment suitable for plant growth. .

  Then, the seed 31 that has fallen into the seed catching region 10 and stayed there can be water-retained by the thin cotton 8 and can be germinated and grown by obtaining nutrients from the fertilizer adhered to the thin cotton 8. In particular, since the plant seeds 32 captured in the pockets 9 can obtain nutrients from the fertilizer 5b in the fertilizer bag 5, they can germinate and grow easily and reliably.

  Further, the fertilizer 5b in the fertilizer bag 5 is extremely slow acting and does not supply extra nutrients, so it is possible to prevent excessive fertilizer, and the nutrients necessary to grow only the local species in the pocket 9 Can only supply. In other words, it is possible to prevent the occurrence of problems such as water pollution and overgrowth of weeds due to excessive fertilizer, and to achieve the overgrowth of local species without affecting the ecosystem at the construction site.

  In the above-described embodiment, the vegetation mat 1 has the base material bag 7 so that the slope N can be greened and stabilized at an early stage after construction, but the present invention is not limited to this. . That is, by adopting a configuration in which the base material bag 7 containing the seeds 7b is omitted, for example, even in a site where the introduction of seeds such as a quasi-national park or a national park is restricted, the erosion of the slope is prevented. At the same time, you can plant trees using local species.

It is a longitudinal cross-sectional view which shows the structure of the vegetation mat for the periphery plant introduction of this invention. It is a disassembled perspective view which shows the structure of the net body main body of the said vegetation mat. It is a perspective view which expands and shows the structure of the said vegetation mat. It is a figure explaining the slope protection construction method using the said vegetation mat. It is a figure which shows the state after laying the said vegetation mat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vegetation mat for introduction of surrounding plants 2 1st net 2c mesh 3 2nd net 3c mesh 3c 'mesh 4 container part 5 fertilizer bag 6 container part 7 base material bag 8 thin cotton 9 pocket 10 seed capture area 32 periphery Plant seeds

Claims (4)

  A first net arranged on the slope, a second net connected to the first net so as to be positioned above the first net, and between the two nets when installed on the slope By having the fertilizer bag accommodated in the accommodating portion formed in the lateral direction and the thin cotton attached to the first net, the mesh of the second net of the portion constituting the accommodating portion is made dense A vegetation mat for introducing a peripheral plant, wherein a pocket for capturing the seeds of the peripheral plant is formed in the housing portion.   The vegetation mat for introducing a peripheral plant according to claim 1, wherein the fibers constituting the first net are thicker than the fibers constituting the second net.   Seeds of a plant that is housed in a housing portion formed laterally between both nets located on the valley side of the fertilizer bag in a state where it is installed on the slope, and does not adversely affect the ecosystem of surrounding plants at least And a sufficient seed trapping region for trapping and collecting seeds of surrounding plants is provided at a portion located on the mountain side of the fertilizer bag. A vegetation mat for introduction of surrounding plants described in 1.   By fixing the vegetation mat for introducing peripheral plants according to any one of claims 1 to 3 to the slope so that the thin cotton is in contact with the slope and the fertilizer bag is arranged in a contour line, A slope protection construction method, wherein the second net is disposed in a state of being lifted from the slope.

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