JP2008075443A - Slope planting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of being unable to sufficiently take a nutrient required for growth, since a root system cannot come out of a planting layer by a property of the ground for applying a planting method. <P>SOLUTION: This slope planting method comprises a tensioning process of tensioning a lath wire net 1, an installation position selecting process of selecting a position for installing a vegetation soil block 11 in response to a shape of a surface of a slope, a spacer installing process of installing a spacer member 3 having the specific volume via the lath wire net 1 in a position selected in the installation position selecting process, a laying process of laying a rearing base material 5 being a vegetation base of the vegetation soil block 11 on the surface of the slope S provided with the spacer member, an injection process of injecting a water retentive agent into a hole 9 formed when removing the spacer member 3 from the rearing base material 5 sprayed in the laying process, and a vegetation soil block installing process of installing the vegetation soil block 11 in the hole 9 into which the water retentive agent is injected in the injection process. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a slope greening method.

  Conventionally, slopes caused by road development etc. are eroded by rain, wind, frost heaving, etc., and early fall of the introduced plant causes slope slipping and collapse, and further induces new sediment disasters such as debris flow and mud flow There was a problem. This is a phenomenon that occurs because the weathered soil layer that has been supported by the root system of plants deteriorates due to the decline of the plant, and the soil binding force of the root system declines. Therefore, it is necessary to develop and apply a slope revegetation method that develops a thick and long root system. As a means for solving such a problem, there is a slope greening method described in Patent Documents 1 to 3.

JP-A-2005-273209 Japanese Patent Laid-Open No. 2002-4289 JP 2004-337074 A

  Specifically, in Patent Document 1, granular materials made of chip material, foamed glass, etc., earth and sand collected from construction sites, vegetation base materials, aggregating agents, and adhesive base materials are sprayed on the ground surface. The slope greening method for forming the greening layer is described. According to Patent Document 1, a lath wire mesh is stretched along the surface of the ground when spraying the vegetation base material. And according to this invention, in order to achieve the objective of greening, it is supposed to grow a plant in this greening layer.

  Patent Document 2 describes a greening method in which planting pots formed in a lattice shape are fixed on a slope. And this planting pot is provided with the seedling accommodating part which accommodates a seedling, and the fertilizer accommodating part which accommodates the fertilizer formed below the seedling accommodating part. And the seedling accommodation part and the fertilizer accommodation part are divided by the eye plate. According to the description of Patent Document 2, by fixing such a planting pot to the slope, the seedlings grown using the fertilizer accommodated in the fertilizer accommodating portion are located upward from between the frames formed in a lattice shape. To grow towards.

  In Patent Document 3, a plant growth base material and a plant are placed inside a bag body to form a planting bag, the planting bag is arranged on a slope, and the planting bag is covered with a net material to form a slope. A greening structure is to be formed.

  However, according to the slope greening method described in Patent Document 1, several types of seeds are mixed and sown in the greening layer formed on the surface of the ground. In a state where several types of seeds are mixed, seeds of early germination type are preferentially grown, so it is difficult to grow seeds having different germination times at the same time. For this reason, even if you try to apply a revegetation method with the goal of creating a community that is mainly composed of zelkova and enoki, which have good soil conservation, such as cherry blossoms and maples, which are favorable for landscapes, It becomes extremely uncertain to establish a community. In addition, when herbaceous plants and large plants are sown together, herbaceous plants with early germination and early growth cover the main plants, resulting in fewer formation of woody plants and formation of herbaceous communities with weak root system binding force. End up.

  In addition, according to the planting pot described in Patent Document 2 and the tree planting structure using the planting bag described in Patent Document 3, the root system loops in the pot or bag, so the planting method in the natural ground In many cases, the side roots do not develop extensively. And, due to such circumstances, the root systems of woody plants cross each other to form a net structure, and the development of straight roots is suppressed, extending deeply into providence and stratigraphy. I can't. For this reason, there exists a problem that a plant falls by a strong wind, slides down, or is damaged by drying.

  Then, this invention is made | formed in view of such a situation, and it aims at providing the slope planting method which can develop the root system of the target plant preferentially.

  In order to solve the above problems, the slope revegetation method according to the present invention includes a stretching step of stretching a net on the slope surface, and a position where a soil block for vegetation in which plants and fertilizers are unitized is installed. An installation position selection step that is selected according to the shape of the surface of the slope, and a spacer member having a constant volume via the net stretched by the tensioning step at the position selected in the installation position selection step A laying step of laying a growth base material to be a vegetation base of the vegetation soil block on the surface of the slope where the spacer member is set, and the growth sprayed in the laying step An injection step of injecting a water retention agent and / or clay soil for improving water retention in the space into the space formed when the spacer member is removed from the base material, and the injection step It is characterized in that it comprises a vegetation soil block setting step of Oite the water retention agent and / or clay soil is installing the vegetation for soil block injected the space.

  According to this structure, the root of the plant contained in the vegetation soil block installed at the position selected by the setting position selection step is formed by the growing base material or the soil with soft mountain skin as it grows. In some cases, it passes through the soil and grows according to the shape of the mountain surface. And the straight root of the direct thing which grew according to the surface of the mountain surface in this way will penetrate | invade into the clearance gap formed in the surface of the mountain surface, and will further grow. Moreover, the side root extended from the soil block for vegetation extends vigorously between the mountain surface and the growing base material, and forms a net structure by alternately intersecting with the root system of the adjacent tree.

  Moreover, in the above-described configuration, the position where the vegetation soil block selected in the installation position selection step is installed is compared with the other unevenness formed on the ground surface of the mountain surface by the unevenness formed on the ground surface of the mountain surface. Thus, it is preferable that it is a position almost immediately above the recess formed at a severe position.

  According to this configuration, since the layer of the growth base material is formed thicker than other portions in the concave portion formed at a severe position as compared with other unevenness, more water is ensured. And can promote the elongation of the root system of the soil block for vegetation.

  Moreover, in the above-described configuration, the position where the soil block for vegetation selected in the installation position selection step is installed is a position almost immediately above the position where joints or strata are densely developed on the surface of the slope. It is preferable.

  According to this configuration, the root system of the plant infiltrates into the providence or stratum for the moisture present in the joints or strata immediately below, promotes weathering by the root acid eluted from the root tips, and gradually Extends deeply.

  Further, in the above-described configuration, the position where the vegetation soil block selected in the installation position selection step is installed is a position almost directly above the position corresponding to the concave terrain formed on the surface of the mountain surface where water tends to collect. It is preferable that

  According to this configuration, the root system of the plant extends toward a position where water is likely to gather, which is located almost immediately below, and further extends downward toward the slope where more water can be taken. In this way, the root system of the plant extends toward the concave terrain where water tends to gather, so that damage caused by drying can be prevented. In addition, if a plant growth base is constructed on concave terrain where water can easily gather, the growth environment will be improved even on slopes with little water supply, and small communities will gradually expand and proliferate around here. Can do.

  Thus, according to the slope planting method according to the present invention, the slope planting method that can preferentially develop the root system of the target plant without being greatly affected by the nature of the ground surface of the construction area. Can be provided.

  Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. In the first embodiment, the slope greening method according to the present invention is applied to the slope S of the hillside after the soil is collected for use in a landfill site as shown in FIG. Give a simple explanation. And on the surface of such a slope S, the several unevenness | corrugation formed by the sampling operation | work of soil, etc. is formed.

  In the case of applying the slope greening method to the slope S, first, a detailed description will be given of a method of applying a stretching process to the slope S.

  As shown in FIG. 2, the tensioning process is performed by, for example, stretching a lath wire mesh 1 in the construction area of the slope S. The net used here is preferably a net having a strength of a certain value or more, such as a lath metal net. The lath wire mesh 1 is a mesh made of, for example, a metal material made of stainless steel and having, for example, an eye of about 50 mm. In the tensioning step, such a lath metal mesh 1 is stretched so as to cover the entire area where construction on the slope S is desired. Then, the lath metal mesh 1 placed on the construction area is fixed to the slope S by fixing means such as an anchor bolt (not shown). And by extending the lath wire mesh on the slope S, it is possible to prevent the growth base material from collapsing when the growth base material is laid on the slope S. Such a lath wire mesh 1 does not need to be formed of a single wire mesh, and may be formed by combining a plurality of lath wire meshes.

  Next, a detailed description will be given of a method of performing the installation position selection process on the slope S.

  The installation position selection process is a process of selecting a position where a vegetation soil block to be described later is installed according to the shape of the surface of the slope S. Specifically, the installation position of the vegetation soil block selected by the installation position selection step is more uneven than the other unevenness formed on the slope S among the unevenness formed on the slope S. Compared to other concave portions formed on the slope, the concave portion formed on the slope S substantially directly above the position, substantially directly above the position where the joint or stratum formed on the slope S is developed In the installation position selection step, a plurality of installation positions having such properties are selected.

  For example, when an installation position selection process selects a position immediately above a position where the unevenness is severe, and a vegetation soil block is placed at such a position, the plant root system of the vegetation soil block is initially directed to a position immediately below. grow up. Then, when the plant root system grows to a position close to the slope S, the plant root system seeks a portion with more moisture and grows toward the inside of the recess. For example, as the position where the unevenness is intense, there are a position where there is a rock forming the slope S or a crack formed in the soil, a position where there is a step between the rock and the rock, and the like. And when the root system of the plant invades into such a place, the root system of the plant deepens into the ground, preventing the growth of the root system of the plant and preventing the planting of the planting method. The surface S becomes strong.

  In addition, for example, when the position where the joint or stratum is developed in the installation position selection process is selected, and the vegetation soil block is arranged at such a position, the plant root system of the vegetation soil block is First, it grows from the position of installation to almost directly below. And if the root system of a plant grows to the position close to the slope S, the root system of a plant will grow toward the uneven | corrugated recessed part formed by joint or stratigraphy by the property. And when the root system of the plant invades into such a place, the root system of the plant deepens into the ground, preventing the growth of the root system of the plant and preventing the planting of the planting method. The surface S becomes strong. In particular, by selecting the position directly above the cracks formed during joint or stratum as the installation position, the root system of the plant will penetrate into the bedrock forming the joint or stratum, and strengthen the slope. This effect can be expected even more.

  Further, for example, when a position almost immediately above a position where water is likely to gather is selected in the installation position selection process, and the vegetation soil block is arranged at such a position, the plant root system of the vegetation soil block is initially set from the installation position. It grows almost directly below. Examples of the position where water easily collects compared to other concave portions include a water channel continuously formed from the upper part of the slope S, a deep hole formed in the water channel, or a position where a plurality of water channels merge. . When the plant root system grows to a position close to the slope S, the plant root system penetrates into a recess where water tends to gather due to its nature. If the root system of a plant enters a recess where water tends to collect, the root system of the plant can efficiently ingest water. As a method for selecting the position of such a concave portion where water easily collects, for example, it is performed by observing the position where plants are clustered on the slope S before the slope greening method is applied. That is, the weeds and the like that are clustered on the slope S where no construction has been performed are clustered at a position where water tends to gather on the shape of the slope S, so that the position is observed, Select the location as the installation location. In addition, as another method of selecting the position of the concave portion where water easily collects, there is a method of spraying sufficient water to the slope S where no construction is performed and observing how the water flows. is there. And it turns out that the recessed part which the water which flowed on the surface of the slope S by such a method collected much compared with another recessed part is a recessed part where water collects easily compared with another recessed part. In addition, the position where the unevenness is severe, the position where the joint or layer is developed, and the concave portion where water is likely to gather are looked over the entire construction area of the slope S, and the position, joint or layer where the unevenness is severe in the whole area. It is a position where reason is developed or a recess that is easy to gather water.

  And after performing an installation position selection process in this way, it is preferable to mark the lath wire mesh 1 of the position corresponding to the said location for the convenience of construction work.

  Next, a detailed description will be given of a method of performing the spacer installation process on the slope S.

  As shown in FIG. 3, the spacer installation step is a step of installing a predetermined spacer member 3 at the position selected in the installation position selection step in order to secure a space for installing the vegetation soil block. The spacer member 3 is formed by molding a material having a certain strength into a cylindrical shape having a height of 20 cm, for example. And by installing such a spacer member 3 in the installation position of the soil block for vegetation and performing a laying process, the space which installs the soil block for vegetation can be ensured. When such a spacer member 3 is installed at the installation position of the vegetation soil block, the spacer member 3 is inserted into the eye of the lath wire mesh 1. This is because the space for installing the vegetation soil block needs to be closer to the slope S than the lath wire mesh 1. If the mesh of the lath wire mesh 1 is smaller than the diameter of the spacer member 3 and the spacer member 3 cannot be inserted into the eye of the lath wire mesh 1, a portion of the lath wire mesh 1 is cut to enlarge the eye. It is also possible to do. Moreover, since it is preferable that the space which installs the soil block for vegetation is a shape extended in a perpendicular direction, it is preferable that the spacer member 3 stands in the perpendicular direction with respect to the ground (horizon). In order to make the spacer member 3 stand in a direction perpendicular to the ground, it is preferable to cut the bottom of the spacer member 3 in accordance with the inclination of the slope S. In the present embodiment, the spacer member 3 will be described in detail using a cylindrical member, but the shape of the spacer member 3 is not limited to the cylindrical shape, and a columnar member such as a triangular prism or a quadrangular prism. Alternatively, any shape may be used as long as it has a three-dimensional shape capable of securing a space for installing a vegetation soil block.

  Next, a detailed description will be given of a method of applying a laying process to the slope S.

  As shown in FIG. 4, the laying step is performed by laying a growth base material 5 that serves as a vegetation base of the soil block for vegetation in the construction area of the slope S on which the spacer installation step has been performed. Specifically, the laying process is performed by spraying the growth base material 5 uniformly on the construction area of the slope S using, for example, the squeeze pump 7 or the like. And if the growth base material 5 is sprayed uniformly on the construction area of the slope S, the growth base material 5 will be laid uniformly in positions other than the position where the spacer member 3 was installed. At this time, it is preferable that the growth base material 5 is laid with a thickness at which the spacer member 3 is exposed on the surface after spraying, for example, a thickness of about 5 centimeters. In addition, after the growth base material 5 is laid, the lath wire mesh 1 may be exposed on the surface of the laid growth base material 5 or embedded in the growth base material 5.

  At this time, as the material of the growing base material 5 used in the laying process, for example, a base material in which 5 kg of asphalt emulsion such as Cricoat A-501 is mixed per cubic meter of the base material, Portland cement per cubic meter of the base material, etc. There is a base material formulated with 12.5 kilograms of cement and 1.4 kilograms of superphosphate, and a base material formulated with 25 kilograms of cement and 1.4 kilograms of superphosphate per cubic meter of base material. In addition, the base material mix | blended with a base material at this time uses the thing which mix | blended the raw chip and soil in the volume ratio of 1: 1 to 2: 1, and uses the raw chip which passed the 25-mm diameter sieve. It is preferable to do. The base material 5 can also be mixed with plant seeds.

  After performing the laying step, the spacer member 3 is removed to form a hole 9 for installing the vegetation soil block in the growing base material 5 as shown in FIG. In addition, in order to form the hole 9 for installing the soil block for vegetation, after performing the laying process without using the spacer member 3, it is possible to make a hole in the growing base material 5, When such a method is adopted, the depth of the hole is limited, and the workability is poor because work needs to be performed on the growing base material 5 immediately after being laid. However, by sequentially performing the spacer installation step and the laying step, the hole 9 having a sufficient depth for installing the vegetation soil block can be formed, and the spacer member can be formed from the laid growth base material 5. The hole 9 can be formed only by a simple operation of removing 3.

  Next, a detailed description will be given of a method of performing an injection process on the slope S.

  The injection step is a step of injecting a water retention agent and clayey soil into the hole 9 formed on the slope S. In the present embodiment, clay water is used as the water retention agent to enhance the water retention in the holes 9. The clay milk fills the gap between the vegetation soil block installed in the hole 9 and the wall surface of the hole 9 and also serves as an adhesive that fixes the vegetation soil block inside the hole 9. As such clay milk, it is preferable to use, for example, a dam sedimentary soil or a mixture of a flocculant solution of 0.02% solution with respect to 8 liters of soil excavated at a construction site. In addition, the mixing | blending of this clay milk is an illustration to the last, and can be suitably changed according to the moisture content etc. of the soil to be used. It is also possible to inject clay milk into the holes 9 and fertilizer into the holes 9 as nutrients for plants in the vegetation soil block.

  Next, the vegetation soil block installation process will be described in detail.

  The vegetation soil block installation step is a step of installing a vegetation soil block 11 in the hole 9 as shown in FIG.

  The vegetation soil block 11 can extend the root system R of the plant P to be introduced to the slope S thick and long like the root system of a natural tree, and more reliably the plant P immediately after planting which is vulnerable to drying. The root system R can be established and extended deeply like the root system of natural trees, the root system R can effectively utilize the moisture in the soil block 11 for vegetation, and the horizontal root system R The plant P can be easily extended into the surrounding soil, and further, the growth of the plant P contained in the vegetation soil block 11 can be promoted by preventing the fertilizer nutrient from flowing out and dispersed outside the vegetation soil block 11.

  The soil block 11 for vegetation is composed of a plurality of half-housings 13 formed from a growing base material mixed with soil, organic materials, fertilizer nutrients, soil improving materials, etc., and the half-housings 13 are combined into a hollow cylindrical shape. It is formed and buried in the uppermost part of the hole 9 excavated on the construction ground while accommodating the root system R of the plant P solidified with soil and organic matter.

  In general, when the soil is excessively pressurized, the water permeability and air permeability of the soil become poor, and the root system R tends to hardly enter the soil. The vegetation soil block 11 is preferably pressure-molded so that the soil hardness is about 25 mm in the Yamanaka soil hardness meter index. When the base material is pressure-molded to a hardness in this range, it can be produced as a vegetation soil block 11 having excellent water retention, air permeability, fertilizer retention, and erosion resistance.

  In general, when the soil is strongly pressurized, the water permeability and air permeability of the soil become poor, and the root system R does not enter the soil. However, the vegetation soil block 11 has a number of vertical grooves on the side wall of the half-housing 13. Therefore, the root system R can be extended into the vegetation soil block 11 even when using clay-rich soil having poor water permeability and air permeability. Decrease and promote growth. In addition, the vegetation soil block 11 retains its shape for about 6 to 20 months, and thereafter deteriorates and decays naturally with the growth of the root system R, returns to the natural soil, and does not pollute the environment. Further, the vegetation soil block 11 of the present invention does not pollute the ecological environment because no chemical material such as asphalt emulsion or acrylic polymer is used as a binder during production. As such a vegetation soil block 11, an object having the following shape can be used.

  First, as shown in FIGS. 7 to 9, as a vegetation soil block 11, (1) a vegetation soil block 11-1 having neither a through groove nor a through hole on its inner surface side, (2) a vertical through groove. Either a pillar-shaped vegetation soil block 11-2 having 15 or (3) a vegetation soil block 11-3 having horizontal through-holes 17 and through-grooves 19 is preferably used on the construction ground. It is accommodated and buried in the uppermost part of the excavated hole 9.

  The overall shape of these vegetation soil blocks 11-1, 11-2, 11-3 is generally a circular or square columnar object having a diameter of 5 to 20 cm and a height of 5 to 20 cm. Is a matter that is appropriately changed in design in consideration of the size of the plant P and the adaptability to the soil constituting the slope S.

  The half cases 13-1, 13-2, 13-3 constituting the soil blocks 11-1, 11-2, 11-3 for vegetation were mixed with soil, organic materials, fertilizer components, soil improvement materials, and the like. A growth base material is pressure-molded. As described above, the vegetation soil blocks 11-1, 11-2, and 13-3 are molded as the half-housings 13-1, 13-2, and 13-3 constituting the vegetation soil blocks 11-1, 11-2, and 11-3. -2, 11-3 half cases 13-1, 13-2, 13-3 may be molded one by one or vegetation soil blocks 11-1, 11-2, 11-3 It is good also as the half housing | casing 13-1, 13-2, 13-3 which shape | molds in the state of this, and divides | segments and comprises the soil blocks 11-1, 11-2, 11-3 for vegetation. Furthermore, it goes without saying that the vertical through-hole 15 and the horizontal through-hole 17 and the through-groove 19 can be simultaneously molded or retrofitted at the time of pressure molding.

  In the vertical through groove 15 provided on the inner surface side of the vegetation soil block 11, the humidity is high and an environment suitable for rooting is formed. Therefore, the root system R of the plant P is a hollow cylindrical vegetation soil block. 11 can extend deep into the soil. In addition, the main root of the plant P (hanging root) extends deeply in the direction of gravity along the hollow cylindrical portion of the vegetation soil block 11, but the side root (horizontal root) extends vertically in the groove or in the horizontal direction. It penetrates into the through-hole 17 and the through-groove 19, and the side root expands and develops widely around. Thus, in the soil block 11 for vegetation, since the vertical through-hole 15 and the horizontal through-hole 17 and the through-groove 19 are provided in one place or an appropriate number of places, the development of the root system R is promoted. Moreover, since it can be induced early to a root system shape close to a natural forest, it is advantageous for the creation of a plant community in harmony with the natural environment.

  In the vegetation soil block installation step, the vegetation soil block 11 is inserted into the hole 9 and installed as shown in FIG. And if the soil block 11 for vegetation is inserted in the hole 9, clay milk will deform | transform and will fill the space | gap formed between the hole 9 and the soil block 11 for vegetation. And since the hole 9 in which the soil block 11 for vegetation is installed is formed in consideration of the position where the root system R of the plant P of the soil block 11 for vegetation easily enters the soil constituting the slope S, this hole 9 is formed. By installing a vegetation soil block 11 in such a hole 9, it becomes possible for the root system R to enter deeper from the surface of the slope S, increasing the strength of the construction area and increasing the slope after construction. Improve the strength. Specifically, the side root extended from the vegetation soil block 11 extends along the slope S, and further entangles with the side root of the adjacent vegetation soil block 11 to form a net structure. Then, the binding force of the slope S as a whole can be improved by the side roots forming a net structure. Moreover, when the straight root extended from the soil block 11 for vegetation touches the rock B arrange | positioned in the lower layer of the slope S after fixed growth, it will be further below along between the rocks B, the groove | channel of the rock B, etc. Elongate toward. Then, the straight roots extend in the lower layer direction in this way, so that the loss of the straight goods due to drying can be reduced.

  Furthermore, it becomes possible to preferentially develop the root system of woody plants by using woody plants as plants contained in the vegetation soil block 11. In particular, the use of cherry blossoms and maples gives priority to the growth of plants that are favorable to the landscape, and the use of zelkova and enoki to improve soil conservation is aimed at greening the slope according to the purpose. be able to.

  Furthermore, by installing the vegetation soil block 11 in the hole 9 formed in consideration of the position where the root system R of the plant P of the vegetation soil block 11 easily enters the soil constituting the slope S, the plant P The growth can be promoted and further growth of the root system can be expected. Further, by using such a vegetation soil block 11, the slope S can be greened immediately after construction.

  Hereinafter, the second embodiment of the present invention will be described in detail. Since the slope revegetation method according to the second embodiment has the same configuration as the slope revegetation method according to the first embodiment described above, detailed description of the location is omitted. Detailed explanation will be given only for the differences. Specifically, the slope greening method according to the second embodiment is different from the slope greening method according to the first embodiment in the growth base material used in the laying process.

  Specifically, the growing base material includes 40 kg or more of cement-based solidifying material with respect to the base material of 1 cubic meter. According to the inventor's experiment, the content of the cement-based solidifying material is 40 kg or more with respect to the base material of 1 cubic meter, thereby inhibiting the growth of the main target plant contained in the vegetation soil block 11. And germination of flying seeds and the like could be effectively suppressed for a certain period. And thereby, the plant P contained in the vegetation soil block 11 can be preferentially grown compared with other flying seeds.

  Hereinafter, detailed description will be given of experiments conducted by the inventors.

Specific experimental methods include a sample in which 0 kg / m ³ , 20 kg / m ³ , 40 kg / m ³ , 80 kg / m ³ , and 120 kg / m ³ cement are mixed with 1 cubic meter of bark compost, and bark Changes in vegetation over time in samples mixed with 0 kg / m ³ , 20 kg / m ³ , 40 kg / m ³ , 80 kg / m ³ , and 120 kg / m ³ cement for 1 cubic meter of base material mixed with compost and soil Observed. Also, these samples, each tall fescue, Kentucky bluegrass, Italian ryegrass, Medohagi, Yamahagi, and six kinds of seeds Anil, total germination expected number were mixed so as to be 6,000 / m ^2.

First, a detailed description will be given of changes over time in samples in which 0 kg / m ³ , 20 kg / m ³ , 40 kg / m ³ , 80 kg / m ³ , and 120 kg / m ³ cement are mixed with bark compost.

As shown in FIGS. 11 and 12 and Table 1, sample S1 is a mixture of 0 kg / m ³ cement with bark compost, and sample S2 is 20 kg / m ³ with bark compost. Sample S3 is a mixture of 40 kg / m ³ cement with bark compost, and sample S4 is a mixture of 80 kg / m ³ cement with bark compost. Yes, sample S5 is a mixture of 120 kg / m ³ cement with bark compost.

  And the state 70 days after construction of these samples S1, S2, S3, S4, S5 is shown in FIG.13 and FIG.14. At this time, the height of the plant of sample S1 reached about 25 centimeters, and the vegetation coverage was about 100%. Moreover, the height of the plant of sample S2 reached about 25 centimeters, and the vegetation coverage was about 100%. Moreover, the height of the plant of sample S3 reached about 20 centimeters, and the vegetation coverage was about 100%. In addition, sample S4 and sample S5 did not germinate at the stage 70 days after construction. And according to such an experiment, it turns out that the growth of a plant is suppressed suitably in sample S4 and sample S5.

Next, with respect to the base material in which soil is mixed with bark compost, the change over time of the sample in which 0 kg / m ³ , 20 kg / m ³ , 40 kg / m ³ , 80 kg / m ³ , 120 kg / m ³ cement is mixed Detailed explanation is given.

As shown in FIGS. 15 and 16 and Table 2, sample S11 is a mixture of 0 kg / m ³ cement with bark compost and soil, and sample S12 is 20 kg with bark compost and soil. is obtained by mixing a cement / ^{m 3,} sample S13. is obtained by mixing the cement 40 kg / ^{m 3} relative to the bark compost and soil, samples S14,, 80 kg / m against bark compost and soil and in the ^third cement obtained by mixing, samples S15 is obtained by mixing cement 120 kg / ^{m 3} relative to the bark compost and soil.

  And the state 70 days after construction of these samples S11, S12, S13, S14 and sample S15 is shown in FIGS. At this time, the height of the plant of sample S1 reached about 25 centimeters, and the planting rate was about 70%. Moreover, the height of the plant of sample S2 reached to about 25 centimeters, and the planting rate was about 60%. Moreover, the height of the plant of sample S3 reached to 20 centimeters, and the vegetation coverage was about 40%. In addition, sample S14 and sample S15 did not germinate at the stage 70 days after the construction. And according to such an experiment, it turns out that the growth of a plant is suppressed suitably in sample S13, S14, S15.

  As a result of such an experiment, it is understood that 80 kg or more of cement is preferably mixed with 1 cubic meter of bark compost in order to suppress germination of flying seeds for a certain period when only bark compost is used. . In addition, when using a base material mixed with bark compost and soil, to suppress germination of flying seeds for a certain period, 40 kg or more of cement is mixed with 1 cubic meter of base material mixed with bark compost and soil. It is understood that this is preferable. And if the content of the cement is increased, it will affect the growth of the main target plant contained in the vegetation soil block 11 and the growth of flying seeds in the future. As a growth base material capable of suppressing germination for a certain period and capable of growing plants in the future, it is preferable to contain 40 kg or more cement-based solidification material with respect to a base material of 1 cubic meter. I understand. Thus, for example, for about one year from the construction, only the main target plant contained in the vegetation soil block 11 grows without being suppressed by flying seeds or the like. And, for example, about one year after construction, the hydrogen ion concentration of the growth base material decreases, and flying seeds and the like can grow. Thereby, growth of flying seeds etc. can be suppressed for a certain period, and it can prevent that the growth of the main object plant contained in soil block 11 for vegetation is prevented.

  Moreover, as a hydrogen ion concentration of the growth base material at this time, it is preferable that a hydrogen ion concentration is the range of about pH 8 to 10, for example. Thereby, for example, after about one year from the construction, the hydrogen ion concentration of the growing base material is lowered to a concentration at which flying seeds and the like can grow.

  Thus, according to the slope greening method concerning 2nd Embodiment, the plant P contained in the soil block 11 for vegetation can be grown preferentially compared with other flying seeds.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the detailed description was made using the slope S of the hillside from which the soil was collected as the slope to be constructed. However, the slope revegetation method according to the present invention is a wood logging method. It can be applied to any slope, such as a later mountainside, a slope after forest road construction, a river bank, a bank slope, or a slope collapsed by landslide. And among such terrain, the slope revegetation method according to the present invention has severe irregularities formed on the slope, especially when the rock surface is exposed or when traces of earth and sand are collected. The effect is noticeable when applied to the terrain.

It is an elevation view of a slope that is a construction target of the slope greening method according to the embodiment of the present invention. It is an elevational view of the same slope when a tensioning process is performed on the slope. It is an elevation view of the same slope when a spacer installation process is performed on the same slope. It is an elevational view of the slope when the laying process is performed on the slope. It is an elevation view of the same surface when the spacer member is removed after the laying process is performed on the same surface. It is a perspective view of the soil block for vegetation installed in the slope. It is sectional drawing and a top view which show the example of the soil block for the vegetation. It is sectional drawing and a top view which show the example of the soil block for the vegetation. It is sectional drawing and a top view which show the example of the soil block for the vegetation. It is sectional drawing of the same slope when performing the soil block installation process for vegetation on the slope. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method. It is a figure which shows the result of the experiment regarding the cultivation base material used in the greening method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lath wire mesh 3 Spacer member 5 Growth base material 7 Squeeze pump 9 Hole 11 Vegetation soil block 13 Semi-housing 15 Through groove 17 Through hole 18 2007 Through groove P Plant R Root system S Slope

Claims (6)

A stretching process for stretching a net on the slope surface;
An installation position selection step of selecting a position for installing a vegetation soil block unitized with plants and fertilizers according to the shape of the surface of the slope;
A spacer installation step of installing a spacer member having a certain volume via the net stretched by the stretching step at the position selected in the installation position selection step;
A laying step of laying a growth base material to be a vegetation base of the vegetation soil block on the surface of the slope where the spacer member is installed;
An injection step of injecting a water retention agent and / or clay soil for improving the water retention in the space into the space formed when the spacer member is removed from the growing base material sprayed in the laying step;
A vegetation soil block installation step of installing the vegetation soil block in the space into which the water retention agent and / or clay soil has been injected in the injection step,
A slope planting method characterized by The position for installing the vegetation soil block selected in the installation position selection step is such that the unevenness formed on the surface of the slope is more intense than the other unevenness formed on the surface of the slope. A position almost directly above the recessed portion formed,
The slope greening method according to claim 1, wherein: The position for installing the vegetation soil block selected in the installation position selection step is a position almost directly above the position where joints or stratigraphy is densely developed on the surface of the slope.
The slope greening method according to claim 1, wherein: The position at which the vegetation soil block selected in the installation position selection step is installed is such that the recesses formed on the slope surface are more likely to collect water than other recesses formed on the slope surface. It is a position just above the position corresponding to the concave terrain,
The slope greening method according to claim 1, wherein: The soil block for vegetation is
It is formed in a cylindrical shape, and has a soil block body that can contain a mixture of soil and fertilizer in the internal space,
The root system of the plant is embedded in a mixture of the soil and fertilizer contained in the soil block body;
The slope revegetation method according to any one of claims 1 to 4, wherein: The slope revegetation method according to any one of claims 1 to 5, wherein the growing base material contains 40 kg or more of cement-based solidified material with respect to a base material of 1 cubic meter.