JPH06294132A - Slope protection greening work and vegitation member - Google Patents

Abstract

PURPOSE:To prevent the erosion of soil which forms a root envelop of a greening plant, to promote the growth of the root and build up a root shape which is favorable to stabilize a slope or to hole a surface layer soil by controlling the growing of the root. CONSTITUTION:A vegetation greening sheet earth retaining 8 is covered from the top of the bottom 2 of a lattice-shaped frame shelf for earth retaining up to the rear side of a slope 3 and embankment 10 is filled. A slope 11 whose slanting angle is identical to the slope 3, is formed in front of the embankment 10. A vegetation cylinder 12 forming a large number of penetration holes 13 on a paper pipe whose both ends are open, is inserted into the slope 11 at a specified angle by way of through holes 9 for the vegetation greening sheet 8. Seeds, nursery plants or cuttings are planted or cultivated. A functioning agent, such as fertilizer, soil conditioner and molding material is mixed with the soil and filled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection greening method on various slopes and a vegetation member used for the protection greening method.

[0002]

2. Description of the Related Art Conventional slope protectors generally have a structure in which wire mesh is stretched over the slope or a structure in which mortar is sprayed, but these obstruct the landscape and change (deteriorate) over time. There is a problem, and especially with mortar, there are many problems in that it peels off due to the frost pillars and the like occurring on the back surface.

Therefore, a new slope protection greening method has been developed as disclosed in Japanese Patent Laid-Open No. 4-213625.
As shown in FIG. 10, this slope protection greenery is used for the front wall 5
2 and the bottom wall 53, a plurality of lattice frame fences 51 are stacked in order to prevent the slope 54 from being soiled and the front wall 5
A vegetation greening sheet 55 is put inside 2 and the lattice frame fence 5
That is, the phenomenon (erosion) of the soil flowing out from the inter-lattice 1 due to rainwater is stopped, and the seeds carried on the vegetation greening sheet 55 are germinated to achieve greening.

[0004]

However, the following problems (1) and (2) still remain in this new slope protection greenery. (1) When it is attempted to plant seedlings or cuttings of the planting plant 56 on the slope 54 on which the sheet 55 for planting planting is stretched as described above, the sheet 55 for planting greening prevents the planting work and subsequent growth. Become. Therefore, vegetation greening sheet 5
Through holes 57 are formed in places 5 and seedlings and cuttings of greening plants 56 are planted from the through holes 57 to the slope 54, but there are the following problems.

Since the vegetation greening sheet 55 has the through holes 57, the soil surrounding the root system 58 of the greening plant 56 is not protected by the vegetation greening sheet 55. Therefore, this soil undergoes erosion and becomes a scour hole 59, the extension of the root system 58 deteriorates and the depth of infiltration into the ground decreases, and in severe cases, the extension of the root system 58 stops and the planting plant. There were times when 56 died.

The extension direction of the root system 58 could not be artificially controlled because it was left to the principle of nature. Then, even if the seedlings or cuttings of the greening plant 56 are planted at an angle, the root system 58 of the plant 56 grows downward in principle from the beginning. For this reason,
It was not always possible to obtain a root system morphology that is preferable for slope stability and surface soil conservation.

(2) In the cut slope formed by cutting the slope, it is preferable to return the cut soil or rock to the slope protection work before use. Therefore, for example, when the slope protection greening work is applied to a cut slope formed from a rock slope, crushed rock produced by crushing the rock slope is filled on the back side of the lattice frame fence. However, in such a case, the vegetation greening sheet 5
Even if 5 is used, since the sheet 55 only partially contacts the packed crushed rock, it is possible to supply water and nutrients necessary for the growth of the greening plant carried on the sheet 55. Therefore, it was difficult to achieve greening.

Therefore, a first object of the present invention is to prevent erosion of the soil surrounding the root system of a greening plant,
A new slope protection vegetation and vegetation member that promotes root system growth and can artificially freely control the direction of root system growth to create a root system form that is preferable for slope stability and surface soil conservation. To provide.

A second object of the present invention is that the crushed rock can be returned to the slope protection work and used, and a greening plant can be grown from between the crushed rocks for greening. Therefore, it is to provide a new slope protection greenery that can improve the landscape.

[0010]

In order to achieve the above object, a slope protection greenery according to the invention of claim 1 uses a vegetation member having a cylinder wall, a half-divided cylinder wall or a channel wall as a slope surface. It was set on the soil or installed on or below the slope reinforcement sheet, and seeds or seedlings or cuttings of greening plants were planted or planted in or near the vegetation member. Here, the mounting angle to the slope of the vegetation member or the installation angle to the strengthening sheet is generally determined in the range from horizontal to vertical, but it is set to an angle lower than the horizontal, or to the slope from the vertical. It is also possible to set the angle to approach parallel.

The vegetation member according to the invention of claim 2 is
The structure has a cylindrical wall, a half-divided cylindrical wall, or a channel wall.
Here, the length of the vegetation member varies depending on how much the extension direction is controlled, and is not particularly limited.
0 to 1000 mm is common. The inner diameter of the vegetation member is
It depends on the type of the planting plant to be planted and is not particularly limited, but is generally 20 to 150 mm.

In the vegetation member according to the third aspect of the present invention, a plurality of through holes are formed in the cylinder wall, the half cylinder wall or the channel wall. Here, the through holes are generally formed so as to be uniformly or nonuniformly distributed over substantially the entire length and circumference of the cylinder wall of the vegetation member, but are formed so as to be unevenly distributed in a part of the cylinder wall. You can also do it.

In the vegetation member according to the invention of claim 4, the cylindrical wall, the half-divided cylindrical wall or the channel wall is formed of a material which gradually collapses in the soil. Here, "materials that gradually disintegrate in the soil" include paper (preferably those that decay in several months to 2 years), or soil or sand that has been hardened with a binder (decomposable in several months to 1 year). ), Corrosive metals or alloys (those that do not adversely affect the growth of plants), starch compounds (should decay in several months), and protein compounds (should decay in several months) Good) and biodegradable synthetic resins (which can be decomposed within a few months). However, when planting greening plants whose root system does not grow so thick, the vinyl chloride resin
It can also be made of polyethylene resin, polypropylene resin, or other non-disintegrating material.

Next, in the slope protection greenery according to the invention of claim 5, a plurality of grid frame fences each having a horizontal bottom portion and an inclined slope portion, which are formed by assembling metal rods in a grid pattern, are provided. The slopes are piled up in order so that they are continuous, the rear side of the slope is filled with crushed rock, and vegetation members made of soil are placed inside cloth bags at the crushed rocks. The seedlings, seedlings or cuttings of the plant for greening were planted or planted.

Here, the material of the cloth bag is not limited to a specific one as long as it has a required strength, and may be, for example, a natural fiber or an artificial fiber. In the trial of the inventor, the reuse of the used grain transport cloth bag is most suitable for the use. This is because the used grain transportation cloth bags are always generated in large quantities, and the reuse of the waste bags not only leads to the utilization of waste, but also that they are functionally durable and have appropriate dimensions. The cloth bag is generally filled with soil at or near the construction site. The method of closing the mouth of the cloth bag is arbitrary, and for example, it may be tied with a string or may be heat-welded. This slope protection greening can be applied not only to the cut slope but also to the embankment slope, and not only crushed rock but also soil may be filled on the back side of the slope.

[0016]

According to the slope protection greening work of claim 1 or the vegetation member of claim 2, the soil surrounding the root system of the greening plant is protected by the vegetation member and erosion of the soil is prevented. Moisture and air contained in the soil are retained by the vegetation member. Therefore, the root system is promoted to expand and the depth of penetration into the ground is increased.

A root (hereinafter referred to as a main root) that grows at the center of the root system of the greening plant grows along the vegetation member or in the direction of growth, and after protruding from the vegetation member, According to the principle of nature, it extends while bending the extension direction downward. Therefore, by appropriately determining the mounting angle or installation angle of the vegetation member, by artificially freely controlling the extension direction of the main root to extend the root system, the root system can be made to crawl into the slope, etc. It is possible to create a root system morphology that is preferable for surface stability and surface soil conservation.

Further, according to the vegetation member of the third aspect, since the plurality of through holes are formed, the flow of moisture and air is improved. Moreover, since the lateral roots that extend laterally from the main roots extend through the through holes, there is no concern that the lateral roots will be prevented from being elongated by the vegetation member.

Further, according to the vegetation member of claim 4, as described above, the main root extends along the vegetation member along its extension direction or is restrained, and the side roots are also stretched in the soil, and then the vegetation member. Will collapse. Therefore, the above-mentioned action lasts before the disintegration, and the elongated root system itself prevents soil erosion after the disintegration. In addition, even when a planting or planting planting plant whose main root grows thick is planted or planted, there is no concern that the growth will be hindered by the vegetation member.

Next, according to the slope protection vegetation of the fifth aspect, the rear side of the slope portion of the lattice frame fence can be filled with crushed rock formed by crushing a rock slope, for example. In addition, a cloth bag filled with soil is placed in each of the filled crushed rocks, and seeds, seedlings or cuttings of a plant for planting green are planted in the soil, so the plant for planting grows by supplying water and nutrients from the soil. can do.

[0021]

EXAMPLES The following is a first embodiment in which the present invention is embodied as a protective greening work for a reinforced embankment slope using a lattice frame fence for soil retention and a vegetation greening sheet, and a vegetation member used for the structure. An example will be described with reference to FIGS.

In the figure, 1 is a lattice frame fence for earth retaining,
A horizontal bottom surface portion 2 formed by bending a mesh body formed by welding metal rods in a vertical and horizontal lattice shape at the upper and lower central portions thereof.
, The inclined slope portion 3, the rear end of the bottom portion 2 and the slope portion 3
And a hook 4 connecting the upper ends of the two. The lattice frame fence 1 was used by stacking a plurality of the lattice frame fences 1 in order so that the slope portions 3 are continuous with each other.

The horizontal length of the standard grid frame fence 1 for earth retaining used in this embodiment is about 2600 mm, the depth of the bottom surface portion 2 is about 700 mm, and the slope length of the slope portion 3 is about 600 mm (with respect to the bottom surface portion 2). The inclination angle of the slope is 30 to 60 degrees). Further, the mutual interval between the vertical metal rods 5 is about 150 mm, and the horizontal metal rod 6 is
The mutual spacing of the bottom surface portion 2 is 200 to 300 mm,
The slope portion 3 has a length of 100 to 150 mm. The diameter of each metal rod 5, 6 is 6-10 mm. Of course, these numerical values can be changed appropriately.

Reference numeral 7 is a reinforcing fiber sheet laid under the bottom surface 2, which is essential for the stability of the embankment and also has a drainage function. Reference numeral 8 denotes a vegetation greening sheet stretched from the upper surface of the bottom surface portion 2 to the back surface of the slope portion 3 to prevent the erosion of the embankment slope and to help the growth of the greening plant. Through-holes 9 for passing vegetation members, which will be described later, were provided in places of the vegetation greening sheet 8.

Reference numeral 10 is an embankment, which is to be filled in the back of the slope 3 and the vegetation greening sheet 8 thereof.
A slope 11 having an inclination angle of about 30 to 60 degrees is formed on the front face of the same as the slope portion 3.

Reference numeral 12 is a vegetation member made of a paper tube whose both ends are open, and a large number of through holes 13 are formed on its cylindrical wall so as to be dispersed over substantially the entire length and the entire circumference. The standard vegetation member 12 has an inner diameter of about 50 mm and a length of about 300 mm. The vegetation member 12 was mounted by being driven in or inserted into the slope 11 at a required angle through the through hole 9 of the vegetation greening sheet 8. The mounting angle of the vegetation member 12 was set variously within the range of horizontal or 80 degrees with respect to the horizontal. These numerical values can be changed as appropriate.

Numeral 14 is a plant for planting or planting in the soil 15 inside the vegetation member 12 in the state of seeds, seedlings or cuttings. Inugaya, Taiminchiku, Kannonchiku, pussy willow, pine, cedar, cypress,
We used Yashabushi, beech, crape myrtle, poplar, etc., but the results of Mukge, crape myrtle, and willow were particularly good. A functional agent 16 such as a fertilizer, a soil conditioner, and a molding agent was mixed with the soil 15 and loaded in a deep place inside the vegetation member 12 to promote the growth of the greening plant 14.

After constructing the slope protection greenery of this embodiment,
Although there was heavy rainfall, the soil 15 surrounding the root system 17 of the greening plant 14 was protected by being surrounded by the vegetation member 12 and erosion was prevented. In addition, the soil 15
Moisture contained in was retained by the vegetation member 12 for many days.

The main root 18 of the root system 17 extends inside the vegetation member 12 by extending the extension direction along the attachment angle of the vegetation member 12 or by being constrained.
After protruding from the opening end on the deep side of the insertion of No. 2, it was extended while bending the extension direction downward according to a natural principle. Therefore, by setting the mounting angle of the vegetation member 12 variously as in the present embodiment, the extension direction of the main root 18 is changed to create a root system form preferable for the stability of the embankment slope 11 and the preservation of the surface soil. We were able to.

The side roots 19 of the root system 17 protruded through the large number of through holes 13 of the vegetation member 12 and extended to the outside.

When the state of the vegetation member 12 was examined 6 months after the construction, the vegetation member 12 was so soft that it could easily collapse when touched, and was substantially collapsed. Therefore, further radial growth of the main root 18
There was no fear of being disturbed by the vegetation member 12.

Next, FIG. 4 and FIG. 5 show a slope protection greening work of a second embodiment of the present invention, so as to contact the upper surface (see FIG. 5) or the lower surface (see FIG. 4) of the reinforcing fiber sheet 7. Inner diameter 20
Vegetation member 20 having a length of -30 mm and a length of 500-1000 mm
And the vegetation member 12 similar to that of the first embodiment is simply mounted on the slope 11, or the vegetation member 20 is simply installed on or below the reinforcing fiber sheet 7, and these vegetation members 12, 20 is different from the first embodiment in that a method of adding 20 to seedlings or cuttings is not used. The vegetation member 20 on the reinforcing fiber sheet 7 is basically installed horizontally, but it may be slightly angled.

According to this embodiment, the water that permeates and flows into the reinforcing fiber sheet 7 also penetrates into the inside of the vegetation member 20, so that the root system of the greening plant 14 planted on the vegetation member 20. 17 can absorb the water. There is also an effect that the root system of the greening plant planted around the vegetation member 20 extends toward the vegetation member 20 in search of the water content. Further, since the vegetation member 20 simply attached or installed improves the air circulation of the soil, it contributes to the extension of the root system of the greening plant around it. In addition, it is the same as the first embodiment in that it is possible to create a preferable root system form for the stability of the slope 11 and the preservation of the surface soil by setting various mounting angles or installation angles of the vegetation members 12, 20. .

6 and 7 show modified examples of the vegetation member, and the vegetation member 21 of FIG. 6 has a large number of through holes 1 in the half-walled cylinder wall.
3 is formed, and the vegetation member 22 of FIG. 7 has a large number of through holes 13 formed in the channel wall. These vegetation members 21, 22 are the vegetation members 12,
It can be used instead of 20, and in that case, the greening plant 14 is planted or planted above the vegetation members 21 and 22.

Next, a third embodiment in which the present invention is embodied as a protection greening method for a cut slope formed by cutting a rock slope will be described with reference to FIGS. 8 and 9. The same members as those in the first embodiment are designated by the same reference numerals as those in FIG.

Reference numeral 25 is a crushed rock filled on the back side of the slope portion 3. In this embodiment, crushed rock formed by crushing the rock slope is used, and the crushed rock 25 forms the slope 11. Reference numeral 26 is a vegetation member arranged at each place of the crushed rock 25, and is a cloth bag 27 in which soil 28 is filled. In this embodiment, the used cloth bag for grain transportation is reused as the cloth bag 27, and the mouth of the cloth bag 27 is tied with the string 29. Further, functional agents such as fertilizers, soil improvers, and molding agents are appropriately added to the soil 28. The bottom of each cloth bag 27 is exposed to the front side through one lattice of the slope portion 3. 14 is a plant for greening exemplified in the first embodiment, and is planted or planted in the soil 28 inside the vegetation member 26 in the state of seeds, seedlings or cuttings, from the exposed portion of the vegetation member 26 to the front side. It has grown.

According to this embodiment, the slope portion 3 of the lattice frame fence 1
The rear side of the rock can be filled with crushed rock 25 formed by crushing a rock slope, for example. In addition, since the vegetation members 26 are arranged in places of the filled crushed rocks 25, and the planting plant 14 is planted or planted in the soil 28 inside thereof, the planting plant 14 supplies water and nutrients from the soil 28. Can receive and grow. Therefore, even if the slope is mainly composed of the crushed rocks 25 that are usually difficult to be greened, the greening plants 14 can be grown from between the crushed rocks 25 to achieve greening, thereby improving the landscape. it can.

The present invention is not limited to the configuration of the above-described embodiment, but may be modified and embodied without departing from the spirit of the invention, for example, as follows. (1) Applying the vegetation member to slope protection greening that does not use a lattice frame fence or a vegetation greening sheet. (2) Use soil retaining members other than lattice frames for soil retaining. (3) Applying the first embodiment or the second embodiment to the cut slope. (4) Apply the third embodiment to the embankment slope. (5) Applying the first embodiment or the second embodiment in combination with the third embodiment.

[0039]

As described in detail above, according to the slope protection greening method of claim 1 or the vegetation member of claim 2, erosion of the soil surrounding the root system of the planting plant is prevented to prevent the root system. It is possible to create a root system morphology that is preferable for stability of slope and preservation of surface soil by accelerating root growth and artificially controlling the growth direction of the root system to crawl the root along the slope. .

Further, according to the vegetation member of the third aspect, it is possible to improve the circulation of moisture and air to promote the extension of the root system, and it is possible to eliminate the obstruction of the extension of the lateral root by the vegetation member.

Further, according to the vegetation member of the fourth aspect, even when a planting or planting planting plant whose main root grows thickly is planted or planted, there is no fear of the growth being hindered by the vegetation member.

Next, according to the slope protection greenery of claim 5, the crushed rock can be returned to the slope protection and used, and a planting plant can be grown between the crushed rocks. It can be used for greening and can improve the landscape.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a slope protection greenery and a vegetation member according to a first embodiment of the present invention.

FIG. 2 is a perspective view of FIG.

FIG. 3 is a cross-sectional view of the main parts of FIG.

FIG. 4 is a cross-sectional view of a slope protection plant and a vegetation member according to a second embodiment.

FIG. 5 is a cross-sectional view of another aspect of the second embodiment.

FIG. 6 is a perspective view of a modified example of a vegetation member.

FIG. 7 is a perspective view of another modification of the vegetation member.

FIG. 8 is a cross-sectional view of a slope protection tree planting structure according to a third embodiment.

9 is a perspective view of FIG. 8. FIG.

FIG. 10 is a cross-sectional view of a conventional slope protection greening method.

[Explanation of symbols]

1 Lattice frame fence 2 Bottom part 3 Slope part 5 Vertical metal rod 6 Horizontal metal rod 7 Reinforcing fiber sheet 11 Slope 12 Vegetation member 13 Through hole 14 Planting plant 20,21,22 Vegetation member 25 Crushed rock 26 Vegetation member 27 Cloth bag 28 Sat

Claims (5)

[Claims] 1. A vegetation member having a cylinder wall, a half-divided cylinder wall, or a channel wall is attached to soil on a slope or installed above or below a reinforced sheet on a slope, and inside or near the vegetation member. A slope protection planting planting or planting seeds, seedlings or cuttings of planting plants. 2. The vegetation member arranged on the slope, which has a cylinder wall, a half-divided cylinder wall or a channel wall. 3. The vegetation member according to claim 2, wherein a plurality of through holes are formed in the cylinder wall, the half cylinder wall or the channel wall. 4. The vegetation member according to claim 2, wherein the tubular wall, the half-divided tubular wall, or the channel wall is formed of a material that gradually collapses in the soil. 5. A plurality of grid frame fences, each of which is formed by assembling metal rods in a grid pattern and has a horizontal bottom surface portion and an inclined slope portion, are stacked in order so that the slope portion members are continuous with each other, and the rear surface of the slope portion is formed. While filling the side with crushed rock, vegetation members, which are filled with soil inside cloth bags, are arranged in places of the crushed rock, and seeds, seedlings or cuttings of greening plants are planted inside the vegetation member or Slope protection planting planted.