Slope greening structure

Abstract

To provide a slope greening structure which prevents erosion of a slope formed by banking, prevents deterioration of scenery due to overgrowth of weeds, and enables plants such as mainly shrubs to grow. [Solution] The system comprises an embankment land 3, at least a portion of which is an inclined surface formed by embankment, plants 4 planted so that their roots are buried in the embankment land, a reinforcing material 7 fixed to the top surface of the embankment land with anchors 5 and having numerous honeycomb-shaped storage sections, and mulching material 8 stored in each of the storage sections 6 of the reinforcing material, the plants being a native species and a shrub evergreen tree species, and the plants are located inside the storage sections of the reinforcing material and planted so that their roots do not come into contact with the mulching material.

Description

[Technical field]

[0001] The present invention relates to a slope greening structure that can prevent erosion on the slope, prevent weeds, and plant shrubs. [Background technology]

[0002] Conventionally, the most common slope greening structures are those formed by spraying seeds or spraying a thick layer of base material. However, these slope structures have problems such as the deterioration of the landscape due to the overgrowth of weeds that have been blown in and the gully erosion of the surface of the slope due to torrential rains.

[0003] Another known structure for preventing slope erosion and greening is a slope structure using a greening multi-mat, characterized in that "a growth base layer containing seeds is applied to the slopes of natural ground, reclaimed land, collapsed slopes, etc., and a mat made of a nonwoven mat material made of extremely fine polyester staple fibers similar to the hairy roots of plants is layered over a synthetic fiber raschel net, the mat being approximately 1.0 m wide and extremely long, and rolled up and laid from the shoulder to the tip of the slope to cover the surface of the growth base layer" (Patent Document 1).

[0004] In addition, a technology for protecting and greening slopes using a honeycomb-shaped three-dimensional reinforcement material called geocell is "a geogrid honeycomb retaining wall in which a plurality of honeycomb structures are stacked approximately horizontally, each layer being made of a honeycomb-shaped three-dimensional reinforcement material made of a plate-shaped or mesh-shaped polymeric strip material in a honeycomb structure, filled with a filler, and the end of the honeycomb structure in the slope section is a stepped structure in which horizontal and vertical surfaces appear alternately like terraced fields, forming a stepped honeycomb structure layer, and a geogrid is arranged approximately horizontally on the natural ground side of the stepped honeycomb structure layer, and the geogrid has a fixing point on the natural ground side of the stepped honeycomb structure layer, and the stepped honeycomb structure is a layer of a retaining wall. A geogrid-honeycomb retaining wall (excluding those in which concrete is poured into the outermost slope of the stepped honeycomb structure layer) is known, which is characterized in that a geogrid extends from the rear natural ground side of a structure layer, passes under a plurality of stacked stepped honeycomb structure layers, covers the slope side surface of the stepped honeycomb structure layer, passes through the upper part of the step-like honeycomb structure layer, reaches the rear natural ground side of the step-like honeycomb structure layer, and is positioned with a fixed portion on the rear natural ground side of the step-like honeycomb structure layer, the geogrid covering the slope side surface is positioned so as to bridge the upper ends of the steps of the step-like honeycomb structure layers constituting the geogrid-honeycomb retaining wall, and the geogrid part covering the slope side surface forms the outermost part of the slope of the geogrid-honeycomb retaining wall (Patent Document 2). However, these slope structures had the risk of causing a decline in the landscape due to the overgrowth of weeds that had been blown in.

[0005] Meanwhile, a structure in which mortar or the like is sprayed onto the surface of a slope is known as a structure that simply prevents erosion of the slope. However, such a mortar-sprayed structure has problems such as deterioration of the lath mesh due to temperature differences caused by weather and repeated infiltration by rainfall, cracks caused by the mortar flying off, and disasters caused by falling pieces of mortar due to deterioration. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility Model Registration No. 3078228 [Patent Document 2] Patent No. 6192763 Summary of the Invention [Problem to be solved by the invention]

[0007] In consideration of the above-mentioned conventional drawbacks, the present invention aims to provide a slope greening structure which prevents erosion of the slope formed by embankment, prevents the deterioration of the landscape due to the overgrowth of weeds, and allows the growth of plants such as shrubs.

[0008] The above and other objects and novel features of the present invention will become more fully apparent from the following description taken in conjunction with the accompanying drawings.

[0009] However, the drawings are for illustrative purposes only and are not intended to limit the technical scope of the present invention. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, the slope greening structure described in claim 1 of the present invention is a slope greening structure consisting of an embankment land base, at least a portion of which is formed by filling soil, a reinforcing material fixed to the upper surface of the embankment land base by fixing devices and having a number of storage sections that are continuous without gaps in the left-right and up-down directions, mulching material stored in each storage section of the reinforcing material, and plants planted in the storage sections via the mulching material, characterized in that the plants are native species and are shrub evergreen species, and are planted so that the roots of the plants do not come into contact with the mulching material.

[0011] The mulching material of the slope greening structure described in claim 2 is either bamboo chip mulching made from crushed bamboo or wood chip mulching made from crushed trees, and the standard thickness of the mulching material is 10 cm. The plants in the slope greening structure according to claim 3 are 3 m 2It is characterized by having one per

[0012] Here, "a large number of storage sections that are continuous with no gaps in the left-right, top-bottom directions" refers to a large number of compartments that, when observed from diagonally above, visually appear as a continuous pattern, regardless of whether the continuous lines are straight or curved, such as a matrix pattern like a checkerboard, a honeycomb pattern like a beehive, a triangular pattern, or a diamond pattern. Effect of the Invention

[0013] As is clear from the above description, the present invention provides the following advantages: (1) In the invention described in claim 1, the mulching material is stored in reinforcing material fixed to the top surface of the embankment land by anchors, thereby making it possible to prevent erosion of the embankment land, etc. (2) In addition, since the plants are planted so as to be positioned inside the storage section of the reinforcing material, the plants can be grown while their roots are protected, and slopes and the like can be efficiently greened. (3) The plants used are native species and evergreen shrubs, making it possible to implement nature-positive slope greening. (4) Since the mulching material is exposed on the surface of the slope, it is possible to prevent the growth of weed seeds and the like that may have flown in. (5) The invention described in claim 2 can also obtain the same effects as those described in (1) to (4) above, and since wood chip mulch or bamboo chip mulch is filled into the storage section as mulching material, it is possible to suppress weeds, keep the soil moist in the embankment, and regulate the temperature. (6) The invention described in claim 3 can also provide the same effects as those of (1) to (5) above, and can also allow planted plants to grow more efficiently. [Brief description of the drawings]

[0014] [Figure 1] 1 is a schematic cross-sectional view of a slope greening structure according to a first embodiment of the present invention; [Diagram 2] FIG. 2 is an explanatory diagram of a reinforcing material according to the first embodiment of the present invention. [Diagram 3] FIG. 2 is an explanatory diagram of the state in which the reinforcing material of the first embodiment of the present invention is installed. [Figure 4] FIG. 2 is an explanatory diagram of the state in which mulching material is stored in the first embodiment of the present invention. [Diagram 5] FIG. 2 is an explanatory diagram of the state in which a plant is planted in the first embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

[0016] In a first embodiment of the present invention shown in Figs. 1 to 5, reference numeral 1 denotes a slope greening structure for reinforcing a slope 2 and greening the slope. As shown in Figures 1 to 5, this slope greening structure 1 is composed of an embankment land 3, at least a portion of which is an inclined surface formed by filling soil, a reinforcing material 7 fixed to the upper surface of the embankment land 3 by anchors 5 as fixing devices and having numerous honeycomb-shaped storage sections 6, chip-shaped mulching material 8 stored in each of the storage sections 6 of the reinforcing material 7, and plants 4 planted within the storage sections via the mulching material so that their roots are buried in the embankment land 3.

[0017] The banking land 3 is a ground formed by filling up the earth, and may be formed as a slope from the bottom to the top as in this embodiment, but may also be formed so as to have a substantially flat surface between the slopes. In this invention, the term "slope 2" refers not only to the slope portion but also to the substantially flat surface between the slopes.

[0018] A number of plants 4 are planted on this banked land 3, and the plants 4 are native species, preferably native woody species (nature positive native species) that originally inhabit the area (container seedlings when planted). Specifically, container seedlings of shrub evergreen native species are used, and in this embodiment, Satsuki azalea, Uma umbellata, Japanese holly, etc. are used. When planting using container seedlings, the size of the roots of the seedlings is preferably large enough to be stored in a 150cc or 300cc container.

[0019] The plant 4 is planted by forming a planting hole in the banked land 3 and inserting the root part into the planting hole. Also, this plant 4 is 3m 2 Potted seedlings of evergreen native shrubs are planted at a rate of approximately one per square meter. By planting and cultivating potted seedlings in areas filled with mulching material 8 and reinforcing material 7, it is possible to suppress perennial weeds, retain soil moisture, and mitigate temperature changes, promoting reforestation based on nature-positive potential natural vegetation community woody plants.

[0020] A reinforcing material 7 having numerous honeycomb-shaped storage sections 6 is fixed to the top surface (surface of slope 2) of this banking land 3 with anchors 5. This reinforcing material 7 is a generally honeycomb-shaped reinforcing material 7 known as geocell, which is made by vertically arranging strip-shaped sheet material made of high-strength resin such as high-density polyethylene and bonding it in a staggered pattern using ultrasound or the like to form a honeycomb shape having numerous storage sections 6 (cells).

[0021] The honeycomb-shaped storage sections (cells) 6 are an example of a preferred embodiment. Therefore, the term "a large number of storage sections that are continuous without gaps" means a large number of compartments that, when observed from diagonally above, visually appear as a continuous pattern, regardless of whether each continuous line in the left-right and up-down directions is straight or curved, such as a matrix-like checkerboard pattern, a honeycomb-like honeycomb pattern, a triangular pattern, or a diamond-like pattern. In addition, the three-dimensional shape of the reinforcing material 7 is a continuous frame of many triangles, diamonds, squares, rectangles, etc., without any gaps. Therefore, the frame of many storage parts naturally includes three-dimensional figures including arc-shaped parts such as geocells, and other three-dimensional figures arranged without any gaps. Also, one cell does not necessarily have to have the same shape as another cell.

[0022] The plants 4 are planted so as to be located inside (inside) the storage section 6 of the reinforcing material 7 via the mulching material 8, and all of the multiple plants 4 are planted so as to be located inside (inside) the storage section 6 of the reinforcing material 7. In other words, the plants 4 are provided so as to be surrounded by the sheet of the reinforcing material 7.

[0023] It should be noted that the plants 4 may be planted inside all of the storage sections 6, or there may be storage sections 6 with no plants 4 planted inside. 2 One plant 4 is provided per unit area, and there is a storage section 6 in which no plant 4 is planted.

[0024] The storage section 6 for the reinforcing material 7 is provided with a mulching material 8 that covers the top surface of the banking land 3. This mulching material 8 may be any ordinary mulching material that can prevent the overgrowth of weeds, but it is preferable that it is bamboo chip mulching made from crushed bamboo or wood chip mulching made from crushed trees. The plants 4 are planted so as to penetrate the mulching material 8, and in this invention, this state is expressed as being planted so as to be located inside (inside) the storage section 6 for the reinforcing material 7 through the mulching material 8.

[0025] By using bamboo chip mulching or wood chip mulching as the mulching material 8, it is possible to obtain the effects of weed suppression, soil moisture retention in the banked land 3, and temperature regulation. In particular, bamboo chip mulching has excellent frost prevention effects in winter, but it is known that it is affected by the allelopathic activity of bamboo. Allelopathic activity includes chemical substances such as phenols and alkaloids, which, when dissolved in the soil, inhibit germination and root growth. It is thought that the effect is particularly large on plants in the early stages of germination, so care must be taken when growing from seeds. On the other hand, in this invention, already grown pot seedlings are used, so the roots have developed to a certain extent, and they are planted so that the roots are buried in the banked land 3, so the effect is thought to be limited.

[0026] Incidentally, with regard to the thickness of the mulching material 8, a thickness of 10 cm or more results in a vegetation coverage rate of 0%, and considering that perennial plants are competitive species and are the main factor inhibiting the growth of pot seedlings, it is most economical and has the highest weed-prevention effect to set the standard mulching thickness t0 = 10 cm, so in this embodiment the height (thickness) of the reinforcing material 7 is 10 cm, and the height of the mulching material 8 filled into this reinforcing material 7 is also 10 cm.

[0027] The plant 4 is placed in the center of one geocell, but the height of the mulching material 8 is about 5 cm within the cell, and as mentioned above, the roots are planted so that they are buried in the banking ground 3 so that they do not come into contact with the mulching material 8. By planting the plant in a buried state so that the roots do not come into contact with the mulching material 8 in this way, there is less need to directly consider the impact of the high C / N ratio of the bamboo chips. Materials with a high C / N ratio (e.g. bamboo chips) consume nitrogen in the soil during the decomposition process, which can cause a nitrogen deficiency, but this impact is reduced if the bamboo chips do not come into direct contact with the roots of the seedlings. Therefore, since the bamboo chip mulching material 8 is away from the roots, the impact of nitrogen consumption occurring during the decomposition process of the bamboo chips on the roots can be limited. [Industrial Applicability]

[0028] This device is used in the greening industry for slopes and the like. [Explanation of symbols]

[0029] 1: Slope greening structure, 2: Slope, 3: Filled land, 4: Plants, 5: Anchor, 6: Storage section, 7: Reinforcement material, 8: Mulching material.

Claims

1. a fill land formed by filling, at least a portion of which is a slope; A slope greening structure comprising a reinforcing material fixed to the upper surface of the embankment by fasteners and having a number of storage compartments that are continuous in the left-right and up-down directions without gaps, mulching material stored in each of the storage compartments of the reinforcing material, and plants planted in the storage compartments via the mulching material, A slope greening structure, characterized in that the plants are native species and are shrub evergreen species, and are planted so that the roots of the plants do not come into contact with the mulching material.

2. The slope greening structure described in claim 1, characterized in that the mulching material is either bamboo chip mulching made from crushed bamboo or wood chip mulching made from crushed trees, and the standard thickness of the mulching material is 10 cm.

3. The plant is 3 m ２ 3. The slope greening structure according to claim 1, wherein one tree is provided per slope.

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