JP2008038541A - Incline greening structure and construction method of incline greening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an incline greening structure and a construction method of incline greening which can efficiently retain rainwater and which can perform water sprinkling to an incline. <P>SOLUTION: The incline greening structure is constituted by providing a unit earth-retaining means 13 to the incline 11 at intervals in all directions and by spraying and executing a base member 14 on top of the unit earth-retaining means 13. The unit earth-retaining means 13 is constituted by fixing a pair of earth-retaining members 10 to the incline 11 in an inversion V shape by an anchor member 12. As an earth-retaining member 10, a member is used which has a bottom and which is constituted by a hollow member, and a small hole for water sprinkling connected to the internal space is formed on the outer periphery of the earth-retaining member 10. An opening is provided on the mountain side, and the small hole for water sprinkling is provided on the incline 11 side. Then the earth-retaining member 10 is fixed to the incline 11 by the anchor member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a sloped greening structure and a sloped greening method suitable for greening a retaining wall on which a bare surface such as a hard rock surface is constructed.

  The retaining wall, which is reinforced by placing concrete or mortar, exposes the solidified concrete and damages the landscape and damages the natural environment. Greening work is also being promoted on the walls.

  As a method of greening construction, an anchor material provided with an anchor pin driven into the retaining wall and a flat earth retaining material fixed to the anchor pin is used. After fixing multiple, sandy soil (including locally generated soil) is sprayed onto the sloped land until the earth retaining material is almost buried, and then a protective net is laid on the upper side of the sandy soil, and then the vegetation base material An inclined land greening method is proposed and implemented (see, for example, Patent Document 1).

  By the way, in steep slopes, topsoil is likely to be washed away, and rainwater etc. flows on the surface of the base material, and there is a problem that sufficient water necessary for plant growth cannot be secured, and the growth of plants is inevitably delayed. was there.

  Therefore, the unit earth retaining means, in which the earth retaining material is connected in a V shape and fixed in an inverted V shape (mountain shape) with an anchor pin to the slope, is spaced apart from the slope in the vertical and horizontal directions. A sloped greening structure is also proposed which is provided in a zigzag pattern and is sprayed on a base material (see, for example, Patent Document 2). In this sloped planting structure, the base material tends to move downward due to its own weight between the earth retaining materials of adjacent unit earth retaining means, but the movement is an earth retaining material arranged adjacently in an inverted H-shape. Since the base material is compacted as it goes down, the base material can be effectively prevented from being washed away by rainwater, even on steep slopes. However, there is an advantage that it can be suitably used.

  On the other hand, bamboo material cut to the set dimensions is used as the earth retaining material, a small hole communicating with the inner space is formed in the outer periphery of the earth retaining material on the sloped land side, and the outer periphery of the earth retaining material on the opposite side to the sloped land In the state where intake holes for taking rainwater etc. into the interior space are formed and fertilizer is filled in the interior space of the earth retaining material, the intake hole is on the upper side and the inclined direction is spaced apart from each other in the left-right direction. An inclined land greening structure has also been proposed in which a soil retaining material is fixed and fertilizer is gradually supplied from a small hole to an inclined land together with rainwater taken from the intake hole (see, for example, Patent Document 3).

JP-A-10-37220 Utility Model Registration No. 3105559 JP 2005-163440 A

  In the sloped greening structure described in Patent Document 3, fertilizer can be supplied to the sloped land for a long period by filling the interior space of the earth retaining material made of bamboo with fertilizer. However, since it is necessary to form not only small holes for fertilization but also a plurality of water intake holes for taking in rainwater, there is a problem that the work of the earth retaining material becomes complicated. This sloped greening structure is intended to supply fertilizer to the sloped land, and since the amount of rainwater taken into the interior space of the earth retaining material may be small, it can be used for irrigation of the sloped land. It was difficult to use as a sloped greening structure.

  An object of the present invention is to provide an inclined land planting structure and an inclined land planting method capable of efficiently storing rainwater and irrigating the inclined land.

  The slope greening method according to the present invention is provided with unit earth retaining means in which a pair of earth retaining materials are fixed with anchor materials in an inverted V-shape with respect to the sloped ground, spaced apart from each other vertically and horizontally. In addition, it is a sloped greening structure formed by spraying a base material on it, and as the earth retaining material, a irrigation small hole communicating with the internal space made of a bottomed hollow member is used in the outer peripheral portion. The opening is on the mountain side and the small hole for irrigation is on the sloping ground side, and the earth retaining material is fixed to the sloping ground with an anchor material.

  In this sloped planting method, rainwater flows into the interior space of the retaining material from the opening at the upper end of the retaining material arranged in an inverted V shape, and is stored in the retaining material. The water will gradually be irrigated through the slope. For this reason, even if it is a steep slope with a small water retention, etc., the plant growth can be promoted by sufficiently irrigating the slope with the earth retaining material. In addition, since a large amount of rainwater can be filled into the interior space of the earth retaining material using a large opening at the upper end of the earth retaining material, a through-hole or the like for taking rain water into the internal space is separately formed. There is no need, and processing work for the earth retaining material can be reduced. Further, since the earth retaining material is arranged in an inverted V shape, the base material is compacted as it goes downward due to its own weight between the earth retaining materials of the adjacent unit earth retaining means. Even on sloped slopes, the loss of base material due to rainwater can be effectively suppressed, and even when used on a flood slope such as a dam lake, the loss of base material can be effectively prevented.

  Here, as the earth retaining material, it is a preferred embodiment to use a bamboo material from which nodes other than the lower end are removed. As the earth retaining plate, it is possible to adopt any structure as long as it is a hollow member with a bottom, for example, a section made of a synthetic resin material or a metal material having a cross-section formed in a circular shape, an elliptical shape or a polygonal shape. If bamboo is used, the production cost can be reduced, and the greening of sloped land that is friendly to the natural environment is possible. In addition, the earth retaining material made of such bamboo material can maintain its strength without decaying in the soil for 4 to 5 years, and the plant is sufficiently rooted in the meantime, so that the base material remains after the bamboo material decays. It will not be washed away. In addition, it can contribute to the development of local industries because it can be used to make earth retaining materials using bamboo materials procured locally.

  When bamboo is used as the earth retaining material, a through hole is formed in the upper end portion of the earth retaining material and the lower end portion of the earth retaining material below the remaining nodes, and an anchor material is provided in the through hole. It is a preferred embodiment to insert and fix the earth retaining material to the slope. In the present invention, since the internal space of the earth retaining material is utilized as a rainwater storage space, when the anchor material is inserted so as to penetrate the storage space and the earth retaining material is fixed to the inclined ground, the insertion portion of the anchor material is watertight. It is necessary to seal in a shape, and the work becomes complicated. In this invention, the upper end portion of the earth retaining material is fixed by inserting the anchor material so as to penetrate the upper part of the storage space that hardly affects the amount of stored water, and the lower end portion of the earth retaining material. The anchor is inserted below the remaining nodes, that is, by inserting the anchor material without penetrating the storage space, so that the mounting strength of the earth retaining material to the slope can be sufficiently secured, and the anchor material is inserted. Since it is not necessary to seal the portion to be done, it can be easily constructed, and a sufficient amount of rainwater can be stored.

  The top end portion of the earth retaining material may be cut obliquely to form an opening, and the earth retaining material may be fixed to an inclined ground so that the opening faces the mountain side. If comprised in this way, rainwater can be taken in efficiently from the upper end opening of the earth retaining material to the interior space of the earth retaining material.

  A filter that prevents the base material from entering the internal space of the earth retaining material may be provided at the upper end of the earth retaining material. With this configuration, the irrigation function of the earth retaining material can be maintained over a long period of time by preventing poor irrigation from the small holes for irrigation and a decrease in the amount of water storage due to clogging of the base material in the interior space of the earth retaining material. it can.

  A drainage hole is formed at the formation position of the irrigation small hole of the earth retaining material, and a sealing body in which the irrigation small hole is formed on the outer periphery of the earth retaining material so as to close the drainage hole is fixed in a watertight manner. It is also a preferred embodiment to form irrigation holes in the earth retaining material. In order to make it possible to irrigate rainwater stored in the earth retaining material as efficiently as possible on the sloping ground, it is preferable to form the irrigation hole with as high a precision as possible, but the earth retaining material has a relatively large size of, for example, 1 m in length. Therefore, if the dimensional accuracy of the small holes for irrigation is increased, there is a problem that the manufacturing cost increases. Therefore, as in the present invention, a small hole for irrigation is formed in the sealing body, and this is fixed in a watertight manner to the retaining material, thereby improving the dimensional accuracy of the small hole for irrigation and retaining the soil. This is preferable because the production cost of the material can be reduced. In particular, when bamboo is used as the earth retaining material, it is necessary to form small holes for irrigation in the field, and the processing accuracy of the small holes for irrigation tends to be low. It is preferable to manufacture the sealing body in a factory or the like and fix it to the bamboo material on site.

  It is also a preferred embodiment that the unit earth retaining means is provided in a staggered manner with respect to the slope. If comprised in this way, while the loss of a base material can be prevented more effectively, the upper end part of the earth retaining material arranged on the lower side is arranged under the lower end part of the earth retaining material arranged on the upper side. The rainwater can be collected by the upper pair of retaining materials arranged in an inverted C shape of the adjacent unit retaining means, and the collected rainwater can be efficiently supplied to the inner space of the lower retaining material.

  The sloped greening method according to the present invention fixes a pair of earth retaining materials in an inverted V shape to an inclined land with an anchor material, and unit earth retaining means arranged in the inverted V shape are vertically and horizontally to the sloped land. It is an inclined landscaping method in which the base material is sprayed onto the base material, and the irrigation small hole communicating with the internal space consisting of a bottomed hollow member is used as the earth retaining material on the outer periphery. When the earth retaining material is applied to the sloped land, the opening is on the mountain side and the small irrigation hole is on the sloped ground side, and the earth retaining material is fixed to the sloped land with an anchor material. It is. In this sloped landscaping method, the same effect as the sloped landscaping structure can be obtained.

  Here, sandy soil and vegetation base material are used as the base material, and after sandy soil is sprayed, a protective net is applied on the upper side of the sandy soil, and then the vegetation base material is sprayed on the protective net. Using a bamboo material from which the nodes other than the lower end portion have been removed as the earth retaining material, and forming a through hole in the upper end portion of the earth retaining material and the lower end portion of the earth retaining material below the remaining nodes. Then, the anchor material is inserted into the through hole, and the earth retaining material is fixed to the sloped land, the upper end portion of the earth retaining material is obliquely cut to form an opening, and the opening is directed to the mountain side. Fixing the earth retaining material to an inclined ground, providing a filter for preventing the base material from entering the internal space of the earth retaining material at the upper end of the earth retaining material, forming a small hole for irrigation of the earth retaining material A drain hole is formed at the position, and a small irrigation hole is formed on the outer periphery of the earth retaining material so as to close the drain hole. It is preferable to fix the sealed body in a watertight manner to form a small hole for irrigation in the earth retaining material, and to provide the unit earth retaining means in a staggered manner with respect to an inclined land. .

  According to the sloped landscaping structure and the sloped landscaping method according to the present invention, it is possible to promote plant growth by performing sufficient irrigation with respect to the sloped land with a soil retaining material even in a steeply sloped land with a small water retention capacity. it can. In addition, since a large amount of rainwater can be filled into the interior space of the earth retaining material using a large opening at the upper end of the earth retaining material, a through-hole or the like for taking rain water into the internal space is separately formed. There is no need, and processing work for the earth retaining material can be reduced. Further, since the earth retaining material is arranged in an inverted V shape, the base material is compacted as it goes downward due to its own weight between the earth retaining materials of the adjacent unit earth retaining means. Even on sloped slopes, the loss of base material due to rainwater can be effectively suppressed, and even when used on a flood slope such as a dam lake, the loss of base material can be effectively prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1 to FIG. 4, the sloped greening structure includes a unit earth retaining means 13 in which a pair of earth retaining materials 10 are fixed in an inverted V shape with an anchor material 12 with respect to the sloped land 11. The sloped greening structure is formed by spraying the base material 14 on the top, bottom, left and right, and is constructed with a bottomed hollow member as the earth retaining material 10 and communicates with the internal space 15. The irrigation hole 16 is formed on the outer periphery, the opening 17 is on the mountain side, the irrigation hole 16 is on the slope 11 side, and the earth retaining material 10 is anchored to the slope 11 with the anchor material 12. It is fixed. In the present embodiment, as the base material 14, the sandy soil 18 and the vegetation base material 19 have a protective net 20. After the sandy soil 18 is sprayed and constructed, the protective net 20 is constructed on the upper side of the sandy soil 18. Then, although the base material 14 which has just been applied by spraying the vegetation base material 19 onto the protective net 20 is employed, it is also possible to employ base materials having other configurations. Moreover, although this Embodiment demonstrates the case where the slope 11 which consists of the slope which pre-constructed the hard slope 22 which consists of concrete or mortar on the upper surface of the ground 21 is greened, the hard slope 22 which consists of concrete or mortar etc. In addition, the present invention can be similarly applied to the case of greening a hairless land where a plant does not grow naturally, such as a hard rock surface.

  The earth retaining material 10 may be of any configuration as long as it has a bottomed hollow member that can store water, such as a metal material such as an iron-based metal or an aluminum alloy, a reinforced plastic material, or an engineering plastics material. A synthetic resin material or the like molded into a bottomed cylindrical shape, or a bamboo or wood processed material can be employed. It is preferable that the earth retaining material 10 is made of a woody material such as wood or bamboo because the natural environment can be protected. In particular, when bamboo is used as the earth retaining material 10 as shown in FIGS. By removing nodes other than 25, it can be easily processed into a bottomed cylinder, and is less likely to decay than wood, and can be suitably used because it can maintain its strength without decaying in the soil for 4-5 years. . When the earth retaining material 10 is made of bamboo, after the bamboo is cut to a set length, the other ends are removed by leaving the lower ends of the bamboo 25, thereby providing an opening 17 at the upper end. The bottom cylindrical earth retaining material 10 can be manufactured. In addition, when using wood such as thinned wood, the earth retaining material 10 is manufactured by cutting the wood into a set size and forming a bottomed hole extending along the length direction at the center of the wood. be able to.

  The cross-sectional shape of the earth retaining material 10 is circular when bamboo is used, but can be formed into an arbitrary cross-sectional shape such as a circle, an ellipse, or a polygon when other materials are used. The length of the earth retaining material 10 can be set to 0.5 m to 1.5 m depending on the size of the construction area of the sloped greening structure, and the height of the earth retaining material 10 is set to 90 mm to 150 mm. it can.

  As shown in FIG. 3, the upper end portion of the earth retaining material 10 is obliquely cut at an angle θ <b> 1 with respect to the length direction of the earth retaining material 10. Although it is possible to cut it at right angles to the length direction, it is preferable to cut it obliquely because the opening area of the upper end opening 17 becomes larger and it becomes easier to take in rainwater. Further, by fixing the earth retaining material 10 to the slope 11 with the opening 17 thus obliquely cut toward the mountain side, rainwater can be efficiently taken into the earth retaining material 10. Become. The inclination angle θ1 of the opening 17 with respect to the length direction is set to be substantially the same as the inclination angle θ2 of the earth retaining material 10 with respect to the inclination direction of the inclined land 11 so that the opening 17 is arranged substantially horizontally while being fixed to the inclined land 11. It is preferable to configure.

  A filter 23 is provided at the upper end of the earth retaining material 10 so as to close the upper end opening 17 of the earth retaining material 10, and the base material 14 is prevented from entering the internal space 15 of the earth retaining material 10, and only rainwater is present. It is configured to be taken into the internal space 15 through the filter 23. As the filter 23, a natural fiber such as cotton or coconut fiber fiber, a regenerated fiber, a semi-synthetic fiber, a synthetic fiber or a chemical fiber such as an inorganic fiber is compression-molded in a mat shape, or a woven fabric made of these fiber materials. Or what consists of a nonwoven fabric and a metal mesh can be used. The filter 23 can also be provided in the upper end portion of the earth retaining material 10.

  The fixing structure of the earth retaining material 10 to the slope 11 will be described. As shown in FIGS. 3 and 4, the upper end vicinity portion of the earth retaining material 10 and the lower end portion of the earth retaining material 10 below the node 25 are provided. The through holes 24 are formed, and the earth retaining material 10 is fixed to the inclined ground 11 by inserting the anchor materials 12 into both through holes 24 and driving and fixing the anchor material 12 to the inclined ground 11. By constituting in this way, it is possible to sufficiently secure the attachment strength of the earth retaining material 10 to the slope 11 and to store a sufficient amount of rainwater for a long period without sealing the portion through which the anchor material 12 is inserted, The workability of the earth retaining material 10 can be improved without deteriorating the water storage performance. In addition, when using what consists of materials other than bamboo as the earth retaining material 10, a partition wall is formed in the lower end vicinity part of a hollow pipe-shaped earth retaining material, and the earth retaining material 10 is located below a partition wall. The through-hole 24 is formed in this.

  As the anchor material 12, a stainless steel anchor pin having a sharply configured lower end can be suitably used, but a pipe-like or elongated plate-like one can also be adopted. The material of the anchor material 12 is not limited to stainless steel, and metal such as carbon tool steel, coated cemented carbide, high speed steel, light alloy, ceramics, plastic, hard rubber, or the like may be employed.

  However, as the fixing structure of the earth retaining material 10, a fixing structure other than the above can be adopted. For example, by winding a metal strip around the earth retaining material 10, inserting an anchor pin into through holes formed at both ends of the metal strip, and driving the anchor pin into the slope 11 to fix it, The earth retaining material 10 can also be fixed. In addition, using U-shaped or J-shaped anchor pins, the anchor pin is fixed to the slope 11 so that the earth retaining material 10 is held in the curved portion of the anchor pin. The material 10 can also be fixed. Furthermore, it is also possible to fix the earth retaining material 10 to the slope 11 by wrapping a string body such as a metal wire around the earth retaining material 10 and fixing both ends of the string to the slope 11 with anchor pins. It is.

  Moreover, since the upper end part of the anchor material 12 protrudes upwards from the earth retaining material 10, the protective net 20 can be engaged with the upper end part of the anchor pin to prevent displacement of the protective net 20, and the vegetation base Since the vegetation base material 19 can be sprayed while confirming the spraying height of the material 19 by the protruding state of the upper end portion of the anchor material 12, the vegetation base material 19 can be sprayed with an appropriate amount with high accuracy.

  As shown in FIG. 4, a small irrigation hole 16 for irrigating the slope 11 with rainwater stored in the internal space 15 of the earth retaining material 10 is formed near the node 25 of the earth retaining material 10. If the diameter of the small hole 16 for irrigation is too large, the stored rainwater will be drained in a short time, and the irrigation effect will not be sufficiently obtained. If it is too small, the irrigation amount will be too small to obtain the irrigation effect. Therefore, the diameter is set to 0.1 mm to 4 mm. Further, as the number of irrigation holes 16 increases, the amount of irrigation per unit time increases, so the diameter of the irrigation holes 16 is set according to the number of irrigation holes 16.

  The small holes for irrigation 16 can be formed at the nodes 25. With this configuration, the opening of the small holes for irrigation 16 is covered with the lower end of the cylindrical earth retaining material 10, so Irrigation failure due to clogging of the base material 14 into the hole 16 can be prevented. Further, as shown in FIG. 5, a drainage hole 27 having a diameter larger than that of the small irrigation hole 16A is formed in the earth retaining material 10 so as to correspond to the formation position of the small irrigation hole 16A, and the drainage hole 27 is sealed. As shown in FIG. 6, a sealing body 28 made of an adhesive tape having a small watering hole 16A is adhered to the outer periphery of the earth retaining material 10 in a watertight manner, or as shown in FIG. It is also possible to provide a small irrigation hole in the earth retaining material 10 by inserting and fixing a sealing body 29 made of a synthetic resin or the like formed with a small hole 16B into the drain hole 27 in a watertight manner.

  As shown in FIGS. 2 and 3, the angle θ2 between the pair of earth retaining materials 10 arranged in an inverted V shape and the inclination direction of the inclined land 11 is set to 40 ° to 50 °, and adjacent unit soils An angle θ3 formed by the earth retaining material 10 in the fastening means 13 is set to 100 ° to 80 °. Further, the interval L1 between the unit earth retaining means 13 arranged adjacent to the left and right is set to 45 cm to 70 cm, and the interval L2 between the unit earth retaining means 13 arranged adjacent to the upper and lower sides is set to 45 cm to 70 cm. The unit earth retaining means 13 is provided in a staggered pattern. By disposing the unit earth retaining means 13 in this way, the base material 14 sprayed between the earth retaining materials 10 of the adjacent unit earth retaining means 13 is compacted as it goes downward, so that the slope is steep. 11, the loss of the base material 14 due to rainwater can be effectively suppressed, and even when used on a flood slope such as a dam lake, the base material 14 can be effectively prevented from being lost. Further, as shown by arrows in FIG. 3, rainwater is guided to the upper end side of the lower earth retaining material 10 by the upper pair of earth retaining materials 10, so that the water storage in the earth retaining material 10 is efficient. Can be performed automatically.

  In addition, it is also preferable to fill the internal space 15 of the earth retaining material 10 with fertilizers and / or additives necessary for plant growth. As fertilizers, solid fertilizers such as nitrogen (N), phosphoric acid (P), potash (K), or chemical fertilizers can be filled. As additives, lime (Ca), manganese (Mn), molybdenum (Mo) And so on. By comprising in this way, a fertilizer and an additive can be supplied to the sloping land 11 with the rain water stored in the internal space 15 of the earth retaining material 10, and the growth of the plant in the sloping land 11 can be promoted further. However, when the fertilizer or additive is filled in this way, the fertilizer or additive toward the irrigation small hole 16 side is provided in the inner space 15 of the earth retaining material 10 so that the irrigation small hole 16 is not clogged. It is preferable to provide a filter that prevents the movement of.

  The base material 14 includes a sandy soil 18 and a vegetation base material 19. When constructing the base material 14, the sandy soil 18 is sprayed on the sloped land 11 in which the unit soil retaining means 13 is installed in a staggered manner, and then a protective net 20 is laid on the sandy soil 18. The vegetation base material 19 is sprayed from the upper side of the protective net 20.

  The sandy soil 18 is a mixture of river sand or mountain sand, water, a binder, a greening base material, and a plant growth material. As the sand, sand obtained at a place different from the construction site can be used, or locally generated soil such as soil or mountain sand obtained at the construction site can be used. As the binder, various cements, water glass, gypsum, and other organic polymer substances can be employed. As the greening base material, for example, organic fibrous materials such as coconut husk and rice straw, organic active fertilizer, humus, peat moss, bark compost, and other humic acid substances can be employed. Examples of plant growth materials include solid fertilizers such as nitrogen (N), phosphoric acid (P), and potassium (K), or chemical fertilizers, trace elements such as lime (Ca), manganese (Mn), and molybdenum (Mo), and others. Various vegetation growth promoters can be used. The blending ratio of each material constituting the sandy soil 18 can be arbitrarily set according to the environment of the slope 11 and the like.

  The vegetation base material 19 is a mixture of an organic active fertilizer, a mineral fired light weight material, a humic acid substance, a polymer flocculant, and a plant seed. As plant seeds, for example, lawn, Kentucky, creeping, timothy, yamahagi and the like can be employed. As the organic active fertilizer, various plant-based recycled materials such as bark compost, peat moss, and humus (green manure) can be employed. As the polymer flocculant, for example, an adhesive polymer material such as an acrylic resin, a polyvinyl (PVC) resin, and a melamine resin can be employed. Examples of mineral fired lightweight materials include nacreous fired foam, obsidian fired foam, vermiculite fired foam, diatomaceous earth fired grains, and the like. As said humic acid substance, various plant-system recyclable materials, such as humic acid substances, such as rice straw, rice straw, and fallen leaves, and green manure, are employable, for example. The blending ratio of each material constituting the vegetation base material 19 can be arbitrarily set according to the construction environment or the like. For example, it mix | blends as shown in Table 1.

  The protective mesh 20 can be composed of a metal mesh or a synthetic resin mesh. In the present invention, a metal mesh or a synthetic resin mesh made of a relatively soft material that can be easily deformed along the upper surface of the base material 14 can be preferably used. As the synthetic resin net, among the geotextiles widely used in the civil engineering field, a geogrid excellent in tensile strength made of a synthetic polymer material such as polypropylene or polyamide can be employed.

  The thickness of the sandy soil 18 is set to be substantially the same as the height of the earth retaining material 10, and is set to, for example, 80 cm to 150 cm. The thickness of the vegetation base material 19 is set to about 3 cm to 7 cm.

  Next, the sloped planting method will be described. This sloped landscaping method is a case where the present invention is applied to the sloped land 11 where the hard sloped land 22 made of concrete or mortar is preliminarily constructed, but the present invention is similarly applied to the sloped land 11 where the ground is exposed. Applicable.

First, an unillustrated through hole having a diameter of, for example, 20 to 60 mm is formed on an existing hard slope 22 having a thickness of 10 to 30 cm at a rate of, for example, 4 to 10 per 1 m ^2. It is formed with a space left and right. This through-hole, for example, collects permeated water on the ground 21 side and inserts a water conduit (for example, a vegetation cylinder having a capillary action) for facilitating water absorption to the sandy soil 18 side, or sandy soil 18. In order to supply sufficient moisture to the sandy soil 18 side. In addition to this through hole, a fixing hole 26 for driving and fixing the anchor material 12 is formed in accordance with the mounting position of the earth retaining material 10.

  Next, as shown in FIGS. 2 and 3, the anchor material 12 is inserted into the through-hole 24 of the retaining material 10 so that the opening 17 of the retaining material 10 is on the mountain side and the small irrigation hole 16 is on the inclined land 11 side. The anchor material 12 is driven and fixed in the fixing hole 26, and the earth retaining material 10 is sequentially fixed to the slope 11 with the pair of anchor materials 12, and the pair of earth retaining materials 10 are anchored to the anchor material 12. The inverted V-shaped unit earth retaining means 13 fixed in the above is fixed in a zigzag manner with a space from top to bottom and left and right with respect to the inclined land 11.

  Next, as shown in FIG. 4, after sandy soil 18 is sprayed and applied to such an extent that substantially the entire earth retaining material 10 is covered, a protective net 20 is laid along the sandy soil 18, and the sandy soil 18. With the protective net 20 covered, the vegetation base material 19 is sprayed from the upper side of the protective net 20 with a substantially uniform thickness so as to be 3 cm to 7 cm, thereby completing the construction of the sloped greening structure. Will do.

  In the sloped greening structure thus constructed, rainwater or the like flows into the internal space 15 of the earth retaining material 10 from the opening 17 at the upper end of the earth retaining material 10 arranged in an inverted V shape. 10, and the irrigated land 11 is gradually irrigated through the small holes 16 for irrigation. For this reason, even if it is a steep slope with a small water retention capacity, the soil retaining material 10 can sufficiently irrigate the slope 11 to promote the growth of the plant. Further, since the unit earth retaining means 13 is provided in a staggered manner with respect to the inclined land 11, rainwater is collected by the upper pair of earth retaining materials 10 arranged in an inverted H shape of the adjacent unit earth retaining means 13. Thus, the collected rainwater is guided to the opening 17 side of the lower earth retaining material 10, and the large opening 17 at the upper end of the earth retaining material 10 is used to provide sufficient space in the inner space 15 of the earth retaining material 10. Since an amount of rainwater can be filled, rainwater can be efficiently taken into the internal space 15 of the earth retaining material 10. Furthermore, since the earth retaining material 10 is arranged in an inverted V shape, the base material 14 is tightened as it goes downward due to the weight of the base material 14 between the earth retaining materials 10 of the adjacent unit earth retaining means 13. Since it is solidified, even if it is steep slope 11, the loss of the base material 14 due to rain water can be effectively suppressed, and even when used on a flood slope such as a dam lake, the loss of the base material 14 is prevented. It can be effectively prevented.

Longitudinal section of sloped greening structure Front view showing the state of unit earth retaining means Front view of unit earth retaining means Fig. 3 is a vertical sectional view taken along the line IV-IV in Fig. 3 with the base material applied Longitudinal cross section near the irrigation hole of another embodiment Longitudinal cross section near the irrigation hole of another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Earth retaining material 11 Inclined land 12 Anchor material 13 Unit earth retaining means 14 Base material 15 Internal space 16 Small hole for irrigation 17 Opening 18 Sandy soil 19 Vegetation base material 20 Protection net 21 Ground 22 Hard slope land 23 Filter 24 Through-hole 25 Node 26 fixing hole 16A small hole for irrigation 27 drainage hole 28 sealing body 29 sealing body

Claims (15)

Unit earth retaining means in which a pair of earth retaining materials are fixed with anchor materials in an inverted V-shape with respect to the sloped ground are provided at intervals above and below and right and left with respect to the sloped ground, and the base material is sprayed onto it. An inclined landscaping structure,
As the earth retaining material, a irrigation small hole that is formed of a hollow member with a bottom and that communicates with the internal space is formed on the outer peripheral portion, the opening is on the mountain side, and the irrigation small hole is on the inclined ground side, The earth retaining material was fixed to the slope with an anchor material,
A sloped greening structure characterized by that.   The sloped greening structure according to claim 1, wherein bamboo material from which nodes other than the lower end are removed is used as the earth retaining material.   A through hole is formed in the upper end portion of the earth retaining material and the lower end portion of the earth retaining material below the remaining node, and the anchor material is inserted into the through hole to fix the earth retaining material to the inclined ground. The sloped greening structure according to claim 2.   The sloped greening structure according to any one of claims 1 to 3, wherein an upper end portion of the earth retaining material is cut obliquely to form an opening, and the earth retaining material is fixed to the sloped land so that the opening faces the mountain side.   The sloped greening structure according to any one of claims 1 to 4, wherein a filter that prevents the base material from entering the internal space of the earth retaining material is provided at an upper end portion of the earth retaining material.   A drainage hole is formed at the formation position of the irrigation small hole of the earth retaining material, and a sealing body in which the irrigation small hole is formed on the outer periphery of the earth retaining material so as to close the drainage hole is fixed in a watertight manner. The sloped greening structure according to any one of claims 1 to 5, wherein a small hole for irrigation is formed in the earth retaining material.   The sloped greening structure according to any one of claims 1 to 6, wherein the unit earth retaining means is provided in a staggered manner with respect to the sloped land. A pair of earth retaining materials are fixed with anchors in an inverted V shape on an inclined land, and the unit earth retaining means arranged in an inverted V shape are constructed with an interval from each other vertically and horizontally with respect to the inclined land. , Sloped greening method of spraying the base material on it,
As the earth retaining material, a irrigation small hole which is formed of a hollow member with a bottom and communicated with the inner space is formed on the outer peripheral portion. With the small hole for the slope side, the earth retaining material is fixed to the slope with an anchor material,
An inclined land planting method characterized by this.   Claims: After using sandy soil and a vegetation base material as the base material, spraying sandy soil, constructing a protective mesh on the upper side of the sandy soil, and then spraying and constructing the vegetation base material on the protective mesh. 8. The sloped land greening method according to 8.   The sloped planting method according to claim 8 or 9, wherein bamboo material from which nodes other than the lower end portion are removed is used as the earth retaining material.   A through hole is formed in the upper end portion of the earth retaining material and the lower end portion of the earth retaining material below the remaining node, and the anchor material is inserted into the through hole to fix the earth retaining material to the inclined ground. The sloped greening method according to claim 10.   The sloped greening method according to any one of claims 8 to 11, wherein an upper end portion of the earth retaining material is cut obliquely to form an opening, and the earth retaining material is fixed to the sloped land so that the opening faces the mountain side.   The sloped planting method according to any one of claims 8 to 12, wherein a filter that prevents the base material from entering the internal space of the earth retaining material is provided at an upper end portion of the earth retaining material.   A drainage hole is formed at the formation position of the irrigation small hole of the earth retaining material, and a sealing body in which the irrigation small hole is formed on the outer periphery of the earth retaining material so as to close the drainage hole is fixed in a watertight manner. The sloped planting method according to any one of claims 8 to 13, wherein a small hole for irrigation is formed in the earth retaining material. The sloped greening method according to any one of claims 8 to 14, wherein the unit earth retaining means is provided in a staggered manner with respect to the sloped land.

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