JPH09302667A - Slope face construction method and slope face structure of natural ecology self-restoration type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide tree planting similar to that in a neighboring natural forest while maitaining strength of a slope face. SOLUTION: Unnecessary matter such as stone and gravel, roots, etc., are eliminated from dug soil at site, and fertilizer is mixed if necessary, so plant vegetation soil is prepared. Root insertion holes 18 in which roots of plants can be inserted are bored in a back surface base 13 to penetrate a masonry retaining wall 10, and part of the vegetation soil is filled in the root insertion holes 18. A sheet 24 on which seeds of tree plants and grass plants are attached, and which can be naturally decomposed in soil is provided to be apart from a front surface of a masonry retaining wall 10, the sheet 24 is covered with a net 26 through which trunks of plants can pass, and the net 26 is fixed to the masonry retaining wall 10 by anchor bolts 22. The vegetation soil is filled in gaps in the front surface of the retaining wall 10 to form a tree planting base 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope construction method and slope structure for protecting and reinforcing an inclined surface (slope) formed by excavation of the ground or the like, and more particularly to a greening base on which plants can grow. The present invention relates to a natural ecology self-restoration slope construction method and slope structure that is constructed on a surface to restore the natural ecology lost by excavation and the like.

[0002]

2. Description of the Related Art For example, an inclined surface (slope) of the ground caused by excavation of the ground, embankment or the like is protected and reinforced by various slope construction methods. As such a slope construction method,
For example, stone materials such as sillicerite or concrete blocks (blocks) are piled up along the shape of the slope, mortar is sprayed directly on the slope, or concrete is cast to protect and reinforce the slope. The construction method has been widely adopted. Further, there is also known a method in which a member in which a wire mesh form and a reinforcing bar are integrated is arranged and assembled, and then mortar is sprayed or a concrete is placed.

Further, continuous long fibers are three-dimensionally entangled in sandy soil and laid on the slope to protect and reinforce the sandy soil by providing pseudo-adhesive force and deformation resistance. The construction method is known as the Texol construction method (geofiber-construction method).

Stacking stones and concrete blocks,
According to the former method of spraying mortar or placing concrete, the slope and the stone, concrete block,
The mortar and concrete are integrated to ensure sufficient strength on the slope. In addition, the slope functions as a retaining wall for the ground, stabilizing the ground.

However, in this method, stone materials and concrete are used.
Special skills by skilled workers are required to install the toe block. On the other hand, in the latter construction method (Texol construction method), since it is sufficient if the continuous long fibers are three-dimensionally entangled in the sandy soil, the construction can be mechanized and the construction can be performed without requiring much skill.

In recent years, in the civil engineering business, the destruction of nature has become a big problem, and the improvement of the landscape by the greening and the preservation of the environment and the conservation of nature are required on the slopes caused by the excavation of the ground, the embankment, etc. ing. In other words, it is strongly desired to restore the former natural ecology by planting seeds of woody plants and plants on the slopes or planting seedlings to green the slopes.

However, in the former method, mortar is sprayed to cover the slope with mortar, stones,
Since the front of the slope is covered with concrete blocks and concrete, it is difficult to create a greening base (growth base) on the slope. Further, in the latter construction method, since sandy soil in which plants are hard to grow is laid on the slope, it is not possible to secure the growing soil itself for the greening foundation. Thus, in the conventional slope construction method, a greening foundation cannot be obtained, and it is difficult to restore the natural ecology.

Therefore, for example, in place of the sandy soil in the latter method (Texol method), a clayey clay having a high viscosity mixed with a fertilizer is used as a soil, and seeds of a suitable plant are mixed in the clay soil. A texol green construction method has been proposed in which continuous soil fibers are entangled to form a growing soil, and this growing soil is laid on a slope. According to this slope construction method, natural ecology can be restored in a short period of time.

[0009]

However, in the texol green method, since the clay and the continuous filaments are three-dimensionally entangled and laid on the slope, only the surface strength is obtained. I can't get it. In other words, although it is excellent in self-restoration of natural ecology, it cannot be expected to function as a retaining wall due to lack of strength.

Further, in the texol green method,
Although burial soil and continuous filaments are three-dimensionally entangled, the greening base is merely created along the slope by spraying on the slope. Therefore, on a steep slope, the greening base layer cannot be made so thick, and it is difficult to secure a base with a thickness suitable for greening.

Further, in the Texol green method, a device for mixing and stirring for mixing fertilizer materials, seeds and the like into a predetermined soil and agglomerating the same, a device for spraying clay and a continuous soil during the construction. Various dedicated devices such as a device for spraying long fibers are required. Therefore, the construction is likely to be complicated, and considerable capital investment is required for the construction.
There is no choice but to increase the cost.

Further, since the burial soil, which is unrelated to the local topsoil, is used as the growing soil, it is difficult to plant greenery close to the original natural forest in the vicinity, and planting ecology with discomfort tends to occur.

It is an object of the present invention to provide a natural ecology self-restoration slope construction method and its slope structure that enable greening close to a natural forest nearby while maintaining the slope strength.

[0014]

[Means for Solving the Problems] In order to achieve this object, according to the natural ecology self-restoration slope method of the present invention, unnecessary materials such as gravel and root systems are removed from the excavated soil at the site, and fertilizer is applied. A soil for growing plants is mixed to make a soil for vegetation, and this soil for soil is laid in front of the existing retaining wall to form a greening base. A sheet that is naturally degradable in soil is covered on the surface of the greening base, and at least seeds of woody plants among the seeds of woody plants and herbaceous plants are attached to this sheet. Furthermore, the sheet is covered with a net through which the trunk of the plant can pass, and the net is fixed together with the sheet.

A rooting hole through which a root of a plant can be inserted is provided on the back base so as to penetrate the retaining wall, and part of the growing soil is packed in the rooting hole. A pipe may be inserted into the root-entry hole to fill the pipe with growing soil. The pipe can be fixed by pouring mortar on the outer surface of the pipe.

As an attachment, a vegetation shelf may be attached later. For example, the vegetation shelf has a substantially L-shaped cross section, is connected to a net with a mounting metal fitting, and the growing soil is packed in the vegetation shelf to ensure a horizontal vegetation surface.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As one embodiment of the natural ecology self-restoration slope method according to the present invention, a greening base is formed on the front surface of an existing stone masonry retaining wall made of stone material such as machinite stone and concrete blocks. To describe the case, first, excavate the topsoil (local topsoil) near the retaining wall to collect growing soil.
Examine the thickness, moisture content, aggregate rate, surface hardness, buried seeds, useful organisms, etc. of the topsoil in the vicinity of the site in advance and select an appropriate topsoil for excavation. For example, 10% of the topsoil in the local area
Even if it is excavated with a certain thickness, it will be restored in a short period of time and the impact will be small.

Excavation and sampling of the topsoil are performed as follows, for example. First, excavate up to about 10% of the thickness of the topsoil with a drilling device such as a lake backhoe attachment, collect it with a strong vacuum, and excavate it with a sorting machine such as a vibrator screen (topsoil). Remove gravel and roots of a certain size or larger from, and collect locally-generated soil (topsoil).
For example, what has passed through a screen with a mesh of 30mm x 30mm is sampled as locally generated soil. Of course, the topsoil may be collected by other methods.

In the conventional texol green method, a dedicated device is used. On the other hand, in collecting the locally generated soil in the present invention, the conventional device can be diverted and a dedicated device is not required.

The topsoil as a locally-generated soil is a treasure trove of useful microorganisms grown in the local natural world over a period of hundreds or thousands of years, and also contains many buried soil seeds.
It goes without saying that it is optimal as a growing soil. It is advisable to add fertilizers such as compost to improve the topsoil planting ecology. By using the locally generated soil, it is possible to reproduce the planting ecology as close as possible to the original natural forest in the field, and it is possible to plant trees without any discomfort with the neighboring areas.

It is known that by maintaining the pH of the topsoil at a neutral level, the growth and reproduction of the microorganisms contained in the topsoil are promoted.
It is advisable to mix a plant fiber material such as peat moss or a porous material such as biocarbon, moctan, coconut husk and artificial clay into the collected topsoil.

One embodiment of the present invention for a masonry retaining wall is shown in FIGS. Here, FIG. 1 is a schematic vertical sectional view of the masonry retaining wall, FIG. 2 is a partially cutaway front view, and FIG. 3 is A of FIG.
The enlarged view of each part is shown.

The masonry retaining wall 10 is constructed by stacking stone materials 12 and filling the gaps between the stone materials with mortar. Further, a foundation concrete 14 is placed on the front surface of the base, and a drainage groove 16 consisting of a U-shaped block is the foundation. It is buried in front of the concrete. Stone material
12, the basic concrete 14 is connected by a connecting pin 17 (see FIG. 3).

A root-entry hole 18 into which a root of a real tree plant can be inserted passes through the retaining wall 10 and is bored in the back ground 13. The root-entry holes 18 have, for example, a diameter of about 42 mm and about two holes per square m 2. Also, do not align vertically
It is advisable to slightly shift them up and down, for example, as shown in FIG.

A shelf member 20 is horizontally provided on the front surface of the stone member 12,
A polymeric water retaining material 21 is placed on the shelf material. For example,
The shelf member 20 is formed by installing a net 20b between two support pins 20a (see FIG. 4), and is arranged, for example, vertically offset from each other by half a pitch (similar to the root hole 18). (See FIG. 3).

Also, a long bolt (anchor bolt) 22
Is vertically embedded in the stone 12 and extends, and two bolts 22a are screwed to the tips of the anchor bolts, and washers 22b between the bolts are attached.
The sheet 24 and the net 26 are clamped and fixed by.

The sheet 24 is made of a non-woven fabric which can be naturally decomposed in soil. It is formed. As the fiber decomposition material, for example, natural fibers (cotton, hemp, etc.) and jute fibers can be used. The seeds of woody plants and herbaceous plants are attached to the sheet 24.

As the woody plant and herbaceous plant, a native woody plant or herbaceous plant selected based on a plant survey around the site is selected so as not to damage the local plant ecology. Then, the nonwoven fabric is woven while the seeds of woody plants and herbaceous plants are folded, or the seeds are sprayed on the woven nonwoven fabric to obtain the sheet 24 with seeds.

The fiber-decomposed material such as natural fiber itself does not have great rigidity. However, in the sheet 24 in which the fiber-decomposing material such as natural fiber is mixed with the corrosion-resistant chemical fiber, the tough chemical fiber having high rigidity functions as a reinforcing material,
The required strength is obtained.

Since natural fibers such as cotton and hemp have a water-immersive property and an air-permeable property, water, oxygen, etc. suitable for seed germination, plant growth and the like are sufficiently supplied. Therefore, the non-woven sheet 24 does not interfere with germination and growth.

In such a sheet 24, it is preferable that the fiber-decomposing material is decomposed and eliminated in the soil in about 6 months when the root system of the plant attached to the sheet elongates. Further, according to the sheet 24 made of the non-woven fabric, the period of decomposition and disappearance can be adjusted by the ratio of the mixing amount of the chemical fiber to the fiber decomposition material.

During the period until the fiber-decomposing material is naturally decomposed and disappears, the root system of the seed plant attached to the sheet 24 is usually elongated, and the root system of the plant is entangled with the remaining chemical fibers and topsoil. Functions as a reinforcement for topsoil. The strength of the topsoil is maintained even after the fiber-decomposing material is decomposed and disappeared, and the topsoil is prevented from eroding and slipping off.

The seeded sheet 24 is covered with a net 26 through which the trunk of the plant can pass. As the net 26, a hard resin net such as Geogrid is used. For example, a geogrid with a mesh of 50 mm x 50 mm will be installed as the net 26. The net 26 and the seeded sheet 24 are fixed to the anchor bolt 22 by the washer 22b and the bolt 22a, as described above. Further, the tip of the support pin 20a of the shelf board 20 is a hook end, and this hook end is locked to the net 26 and the seed-attached sheet 22 to prevent the net and the seed-attached sheet from bulging. .

Then, in the space (gap) in front of the retaining wall covered with the sheet 24 and the net 26, the topsoil sampled locally as described above is laid as growth soil to form the greening base 11. There is.

The sheet 24 and the net 26 may be fixed to a frame body provided above or below the sheet 24 and the net 26. Here, the frame body is fixed to the stone material 12 by anchor bolts.

For example, the topsoil (growing soil) is conveyed and supplied to the space in front of the retaining wall by using high-pressure air or a conveyor, and the root hole 18 is also filled with the topsoil (growing soil). If necessary, before placing the sheets 24 and nets 26, it is advisable to push the topsoil (growing soil) into the root entry holes 18 in advance.

As described above, according to the present invention, the revegetation base 11 is formed on the front surface of the retaining wall by using the local topsoil, which is a treasure trove of useful microorganisms in the natural world and which contains a large number of buried soil seeds, as the growth soil. Therefore, the seeds attached to the sheet 24 sufficiently absorb the nutrients from the growing soil and actively grow, and extend outside beyond the mesh of the net 26, so that the front surface of the retaining wall is covered with green. , The natural ecology is restored early. The plant is a net in Figure 1.
26 shows a state in which the retaining wall 10 is fully bred and covered with green.

Since the topsoil collected in the vicinity of the site is used as a growth soil, it is expected that seeds deposited on the soil will grow herbaceous plants and the like, and greening will be performed in a state close to the original natural forest in the vicinity. In addition, since the seeds of the native species are sown by interposing the sheet 24 based on the plant survey around the site, a natural ecology that does not feel uncomfortable with the local plant ecology can be reproduced.

As seeds of a woody plant that becomes a fertilizer tree, for example, if a legume root nodule plant suitable for the region is selected and attached to the sheet 24, the root system of the legume plant grows faster. Since it is hard to fall down, it has a large pull-out strength and helps stabilize the greening base 11.

Since the natural decomposition and disappearance in the soil due to the secular change in the soil, the sheet 24 does not hinder the germination of seeds, the growth of plants and the like and does not pollute the soil. In addition,
Since the topsoil of the greening base is exposed due to the decomposition and disappearance of the tomato 24, the leaves and branches of the grown plant are taken into the growing soil and a new fertilizer source is obtained.

The roots of woody plants and herbaceous plants have a habit of invading gaps (cracks) or the like in search of water. In the present invention, the roots of the plants are rooted behind the retaining wall (rear surface) through the root-entry holes 18. It also invades the ground (13) and is stretched over the back ground to absorb water, allowing plants to grow large. Further, the root system is stretched around the back ground 13, so that the growing soil (greening base 11) is preserved in front of the retaining wall with sufficient strength.

In particular, the root-entry holes 18 due to the entanglement of the root system.
A lump having a larger diameter than that is formed on the back ground 13 to obtain a large pull-out resistance, and the growing soil (greening base 11) can be firmly held on the front surface of the retaining wall. Further, the root system has a function of intruding into the gap of the weathered soil layer of the back ground 13 to retain and strengthen the weathered soil layer.

As shown in the figure, in the configuration in which the root-entry holes 18 are not vertically aligned but are staggered, the root-entry holes are located close to the roots of the plant, so that the root system is short-termed in the root-entry holes. Can break into.

Of course, since the fixed net 26 holds down the greening base 11, the strength required for the slope is secured and the greening base having a thickness necessary for greening is obtained.

Usually, seeds of both woody plants and herbaceous plants are attached to the sheet 24 for the purpose of greening the front of the retaining wall and restoring the natural ecology, and the greening by the woody plant and the greening by the herbaceous plant are promoted. To be done. However, compared to the case with herbaceous plants,
Tree planting by woody plants has a thick root system and is thick,
It grows fast and firmly protects and maintains the soil, stops the growing soil (greening base 11) on the retaining wall 10, and has an excellent conservation function. Therefore, only seeds of the woody plant may be attached to the sheet 24, and the greening may be promoted by the woody plant, and the greening by the herbaceous plant may be the buried soil seed of the topsoil, the naturally propagated seed, or the like.

When the soil hardness exceeds a certain value, the roots stop growing, so that the roots do not grow enough to press the root holes 18, and the presence of the root holes adversely affects the retaining wall. There is no.

With the root-entry hole 18, the greening base on the front of the retaining wall
11. Since the back ground 13 is communicated, the root entry hole also functions as a drainage hole.

Further, although not shown, if a pipe is put in the root hole 18 and mortar is poured on the outer surface of the pipe to fix the pipe to the retaining wall 10 and the back ground 13, the root hole also functions as an anchor. , A strong slope can be obtained.

In the conventional slope construction method, no measures are taken to reduce the water content and water retention. On the other hand, in the present invention, the shelf board 20 on which the polymeric water retaining material 21 is placed is horizontally provided in front of the retaining wall 10. Therefore, the polymer water-retaining material 21 absorbs and retains water, and the decrease in water content and water retention is prevented, and the water required for plant growth can be secured.

As in the embodiment, a large number of short shelf plates 20 are vertically shifted to form a gap without providing one long shelf plate horizontally continuously, so that the water content is concentrated in one place. It is distributed evenly above and below without staying. The same effect can be obtained even with a configuration in which one long shelf plate is horizontally provided continuously and the polymeric water-retaining material 21 is arranged with a gap.
Further, since the shelf plate 20 is vertically shifted, the growing soil (top soil) is packed in the gap in front of the retaining wall without being disturbed by the shelf plate.

As described above, even in the existing retaining wall (masonry retaining wall), the natural ecology of covering the retaining wall with green by constructing the greening base 11 on its front surface can be easily restored.

It goes without saying that a horizontal vegetation surface is more suitable for plant growth than an oblique vegetation surface. Therefore, it is advisable to install a stepped vegetation shelf as an attachment from above the net 26 to secure a horizontal vegetation surface.

For example, as shown in FIG. 5, the vegetation shelf 32 is connected and fixed to the net 26 by the mounting bracket 34. For example,
The vegetation shelf 33 has a substantially inverted L-shaped cross section in which the bent end of the L-shaped net 35 is vertically erected, and an earth retaining seam is attached to the rear surface thereof.
36 is leaned against.

In the illustrated form, the net 35 is 50 mm x 5
A 0 mm mesh geogrid is used and the left and right ends of the vertical part of the net are folded inward and closed. And
The lower end and the inner end of the net 35 are connected and fixed to the net 26 by a fitting 34 such as an o-clip. As shown in the schematic view of FIG. 6, a large number of vegetation shelves can be easily installed by constructing the vegetation shelves 32 continuously from the continuous net 35 in the vertical direction.

The topsoil collected locally is added to the vegetation shelf 32 as growth soil by adding fertilizer if necessary, and the vegetation shelf 32 has a greening foundation in addition to the greening foundation 11 behind the net 26. It

As described above, by providing the vegetation shelf 32 and ensuring a horizontal vegetation surface, the plant can grow in a natural growth state in which it extends vertically from the beginning.

A water retaining sheet is attached to the bottom of the V-shaped vegetation shelf 32.
Since the gutter 38 is laid to secure the water retention line, sufficient water is supplied to the plants grown on the vegetation shelf. The water-retaining sheet 38 is formed from a water-retaining non-woven fabric, and its left and right ends are closed to prevent free outflow of water, and its upper surface is closed to prevent blockage due to free inflow of growing soil.

Of course, the configuration of the vegetation shelf 32 shown in the figure is an example, and the configuration is not limited to this as long as it can be attached to the net 26 covering the seed-attached sheet 24 later. For example, the vegetation shelf
The vertical surface and the upper surface of 32 may not be formed from a single net (geogrit) 35, but the vertical surface and the upper surface of the vegetation shelf may be formed from different nets, respectively. Also, instead of the net 35,
If a sheet that can secure the required strength is used, the earth retaining sheet 36 on the back surface of the net can be omitted.

Although not shown, the seed-equipped sheet 24 may be arranged under the net 35 of the vegetation shelf 32, or without planting the sheet, seedlings and seeds of woody plants, herbaceous plants are planted. It may be grown directly on the greening base of the shelf.

The present invention can also be applied to existing retaining walls other than stone retaining walls on which stone materials and concrete blocks are stacked, for example, existing mortar spray retaining walls. A natural ecology self-recovery slope method for an existing mortar spray retaining wall will be described with reference to FIG. 7 showing a vertical cross-sectional view of the mortar spray retaining wall and FIG. 8 which is an enlarged view of a portion A. The members corresponding to the members used in the above embodiment are indicated by adding 100 to the reference numeral.

Also in this case, stone gravel and a root system of a predetermined size or larger are removed from the surface soil near the retaining wall 110, the locally generated soil (local surface soil) is collected, and fertilizer is mixed if necessary. Further, a root hole 118 penetrates the retaining wall 110 and is drilled in the back ground 113. Also in the mortar spray retaining wall 110, like the masonry retaining wall 10 described above, about two root-entry holes 118 having a diameter of about 42 mm may be formed per square meter.

Similar to the above embodiment, the anchor bolt 122 is embedded in the back ground 113, the sheet with seed 124, and the net 126.
Is fixed to the tip of the anchor bolt using a nut and a seat plate. Then, in the gap between the sheet 124, the net 126 and the mortar spray retaining wall 110, locally generated soil (local top soil) is filled as a growing soil, and a greening base 111 is formed in front of the retaining wall.

The rear drainage material 42 may be laid on the surface of the retaining wall 110, and the growing soil may be laid on the rear drainage material. In this case, fill the root-entry holes 118 with growing soil in advance, and then
Back drainage material 42 is laid on the surface of retaining wall 110, and then growing soil is packed between sheet 124 and retaining wall 110.

With this structure, since the growth soil is prevented from flowing out due to running water on the retaining wall surface, the greening base 111 can be stably maintained even when a large amount of rainfall occurs. Although not shown, a large number of water drainage holes are formed in the mortar spray retaining wall 110. By laying the rear drainage material 42, the growth soil is prevented from flowing into the water drainage holes and the drainage holes are formed. Can be prevented from clogging.

It is needless to say that the mortar sprayed retaining wall 110 also has the same effects as those of the masonry retaining wall 10 such that the retaining wall can be greened and the natural ecology can be restored while maintaining the strength of the retaining wall. Absent.

As described in connection with the masonry retaining wall 10, the mortar spray retaining wall 110 can also be provided with vegetation shelves. For example, FIGS. 9 to 11 exemplify a form in which the vegetation shelf is attached to the pre-cast mortar spray retaining wall 110 of the lattice-shaped concrete framer 44.

That is, in the construction in which the lattice-shaped concrete frame work 44 is installed, plant growth cannot be expected in the horizontal frame 44H and the vertical frame 44V. Therefore, for example, as can be seen from FIG. 10, the sheet 124 has a horizontally long strip shape avoiding the horizontal frame 44H of the concrete frame work 44, and the area along the horizontal frame is a blank space where plants do not grow. Become a region. Therefore, the step-like vegetation shelf 132 is provided along the horizontal frame 44H of the concrete frame work so as to eliminate this blank area. For example, as shown in FIG. 11, the vegetation shelves 34 are provided vertically one by one along the horizontal frame 44H of the concrete frame work.

Although the sheet 124 has a strip shape,
The net 126 is laid so as to integrally cover many sheets. Anchor bolt 122 is a horizontal frame of concrete framer 44
H, it is embedded in a vertical frame 44V, and the seed-attached sheet 124 and net 126 are fixed to the concrete frame by a hook at the tip thereof.

For example, in the two upper and lower vegetation shelves 132, the lower end of the net (geogrid) 135 of the upper vegetation shelf and the inner end of the upper surface of the lower vegetation shelf net are attached by fittings 134, for example, o-clips. -Connect and fix to the anchor bolt 122 of the horizontal frame 44H of the grate framer. Also, the inner edge of the upper surface of the net 135 of the upper vegetation shelf and the lower end of the net of the lower vegetation shelf are attached to the net 126 on the seed-attached sheet 124 by the mounting brackets 134.
Respectively.

In the illustrated embodiment, as shown in FIG. 11, seedlings of woody plants are to be grown on the greening base of the vegetation shelf 132. It may be placed under the horizontal part of the net 135 of the vegetation shelf.

As described above, when the vegetation shelf 132 is provided, even in the mortar sprayed retaining wall 110 on which the lattice-shaped concrete frame work 44 is laid, the retaining wall is green without forming a blank area. To be covered.

The present invention can also be applied to a concrete retaining wall in which concrete is cast on the foundation ground (concrete casting retaining wall), and a plan view of the concrete retaining wall partially broken. 13 is a sectional view taken along line 13-13 in FIG.
The natural ecology self-recovery slope method on the existing concrete retaining wall will be explained with reference to. Parts corresponding to those used in the masonry retaining wall or the mortar spray retaining wall are indicated by adding 200 to the reference numeral.

Reference numeral 210 indicates a concrete retaining wall cast on the foundation ground 213, and the concrete retaining wall 210 is formed with lattice-shaped small sections. An anchor wire 52 is laid horizontally, for example, horizontally on the upper surface of the concrete retaining wall 210, and the clip 54 is pinned to the vertical frame 244V of the concrete retaining wall 210 from above the anchor wire. -The wire-is fixed.

The anchor bolt 222 is embedded in the horizontal frame 244H of the concrete retaining wall 210, the shelf plate 220 is placed on a series of horizontally arranged anchor bolts, and the polymer water retaining material 221 is placed on the shelf plate. It has been placed.

A seed-attached sheet 224 and a net 226 are arranged in contact with the upper end of the shelf board 46 and fixed to the concrete retaining wall 210 by using anchor bolts 222. That is, FIG.
As can be seen from the above, the seat plate 22 is attached to the upper end of the anchor bolt 222.
The seat 224 and the net 226 are sandwiched and fixed between the bolt and the shelf plate 46 by screwing the nut 222a through the 2b.

Anchor wire 25 on the concrete retaining wall
2. The swelling of the sheet 224 and the net is suppressed by engaging the hook ends of the width stop wires 58 with the net 226. Then, the locally generated soil (local soil) is filled as a growing soil in the gap between the sheet 224 and the concrete retaining wall, and the greening base 211 is formed in front of the retaining wall. Of course,
A root-entry hole 218 is formed, and part of the locally generated soil is pre-filled in the root-entry hole.

Also in this embodiment, the natural ecology can be reproduced on the front surface of the retaining wall in the same manner as above. In particular, in the illustrated form, the sheet 224 and the net 226 are fixed with the shelf plate 220 interposed, and as is clear from FIG. 13, the thickness of the greening base 211 on the front surface of the retaining wall is equal to that of the shelf plate. Since it matches the plate width, the thickness of the greening base can be adjusted according to the plate width of the shelf plate.

In addition, the shelf board 220 is horizontally extended,
Divide the greening base 211 into upper and lower compartments to
Since 1 is placed on the shelf board, the water stays in each compartment evenly and is supplied to the entire surface of the greening base 211 without excess or deficiency.

Although not shown, it goes without saying that in the concrete retaining wall 210, the above-mentioned vegetation shelf can be appropriately set by the mounting bracket 34.

The above-described embodiment of the present invention is for explaining the present invention, and is not intended to limit the present invention in any way. Modifications and alterations are made within the technical scope of the present invention. Needless to say, all are included in this invention.

For example, seeds of a herbaceous plant or herbaceous plant are attached to a net, and seedlings of a herbaceous plant or a herbaceous plant are planted in advance in a growing soil to allow growth from seeds and growth from seedlings to coexist. May be.

[0083]

As described above, according to the natural ecology self-restoration slope method according to the present invention, since the greening base whose local topsoil is the growing soil is formed on the front surface of the retaining wall, the sheet is formed. The seeds attached to the seeds grow by absorbing nutrients from the growing soil and extend outside beyond the mesh of the net, so that the front of the retaining wall is covered with green and the natural ecology is restored at an early stage.

Since the topsoil collected in the vicinity of the site is used as the growing soil, it is expected that seeds deposited on the soil will grow herbaceous plants and the like, and will be greened in a state close to the original natural forest in the vicinity. In addition, since the seeds of the native species are sown based on the plant survey around the site, a natural ecology that is not uncomfortable with the local plant ecology can be reproduced.

Through the root-entry holes, plant roots also invade the ground behind the retaining wall (rear surface ground) and are stretched around the rear surface soil to absorb water, so that the plant can grow large. In addition, the root system is stretched around the back ground, and the growing soil (greening base) is held on the front surface of the retaining wall with sufficient strength.

With the root-entry holes, the greening base on the front of the retaining wall,
Since the back ground is communicated, the root entry hole also functions as a drainage hole.

If the pipe is put in the root hole and the mortar is poured on the outer surface of the pipe to fix the pipe to the retaining wall and the back ground, the root hole also functions as an anchor and a strong slope is secured. .

Since the sheets with seeds are naturally decomposed and disappear in the soil due to aging in the soil, the seed-attached sheet germinated seeds,
It does not hinder the growth of plants and does not pollute the soil. In addition, since the topsoil of the greening base is exposed due to the decomposition and disappearance of the sheet, the leaves and branches of the grown plant are taken into the growing soil to obtain a new fertilizer source.

Since the fixed green net holds down the greening base, the strength required for the slope is secured and the greening base having the thickness required for greening is obtained.

If a pipe is put in the root hole and mortar is poured on the outer surface of the pipe to fix the pipe to the retaining wall and the back ground, the root hole also functions as an anchor and a strong slope is obtained.

By providing a shelf board on which the polymeric water retaining material is mounted on the front surface of the retaining wall, the polymeric water retaining material absorbs and retains water, and the decrease in water content and water retention is prevented.

If the shelves are vertically shifted to provide a gap, the water is evenly distributed vertically without staying in one place, and the growing soil is filled in the gap on the front surface of the retaining wall without being disturbed by the shelves. .

According to the natural ecology self-restoration type slope structure of the present invention, the natural ecology that is green in the state close to the original natural forest in the vicinity and has no discomfort with the local plant ecology can be reproduced at an early stage.

The roots of the plant invade the ground behind the retaining wall (rear ground) through the root-entry holes, the plant grows large, and the growing soil (greening base) is preserved with sufficient strength.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a masonry retaining wall in which a greening foundation is formed on the front surface by a natural ecology self-recovery slope method according to the present invention.

2 is a front view of the masonry retaining wall shown in FIG. 1. FIG.

FIG. 3 is an enlarged view of a portion A of the masonry retaining wall shown in FIG. 1.

FIG. 4 is a perspective view of a shelf board.

FIG. 5 is an enlarged view of a masonry retaining wall corresponding to FIG. 3 with a shelf plate attached later.

FIG. 6 is a perspective view of a shelf board using an integral net.

FIG. 7 is a schematic vertical cross-sectional view of a mortar spray retaining wall having a greening base formed on the front surface thereof by the natural ecology self-recovery slope method according to the present invention.

8 is an enlarged view of a portion A of the mortar spray retaining wall shown in FIG.

FIG. 9 is a schematic vertical sectional view of a mortar spray retaining wall on which a concrete frame work is cast.

FIG. 10 is a front view of the mortar spray retaining wall shown in FIG. 9.

11 is an enlarged view of part A of the mortar spray retaining wall shown in FIG.

FIG. 12 is a partially cutaway plan view of a concrete retaining wall having a greening base formed on the front surface thereof by the natural ecology self-restoration slope method according to the present invention.

13 is a schematic longitudinal sectional view of the concrete retaining wall shown in FIG. 12, taken along line 13-13.

[Explanation of symbols]

 10, 110, 210 Retaining wall 11, 111, 211 Greening base 12 Stone material 13, 113, 213 Rear ground 18, 118, 218 Root hole 20, 220 Shelf board 21, 121, 221 Polymer water retention material 22, 122, 222 Anchor bolt 24,124,224 Sheet (nonwoven fabric) 26,126,226 Net (hard resin net) 32,132 Vegetation shelf 34,134 Mounting bracket 35,135 Net 36,136 Earth retaining sheet 38,138 Water retention sheet 42 Back drainage material 44, 244 Concrete frame work 58 Width stop wire-

Claims (13)

[Claims] 1. A step of forming a root-entry hole through which a root of a plant can be inserted through a retaining wall in a back ground, and a site where stones, roots, etc. are removed from excavated soil generated by excavation of the ground in the vicinity of the site. The process of filling a part of the growing soil of the plant consisting of generated soil into the root-entry hole, and at least the seeds of the woody plant among the seeds of the woody plant and the seeds of the herbaceous plant are attached and can be naturally decomposed in the soil. See
The seed is separated from the retaining wall and placed on the front surface of the retaining wall, the step of covering the seed-attached sheet with a net through which the trunk of the plant can pass, and fixing the net together with the sheet; A natural ecology self-recovery slope method that includes the steps of laying in the gap between the seat and the front of the retaining wall to form a greening base. 2. A step of forming a root-entry hole through which a root of a plant can be inserted through a retaining wall in a back ground, and a site where stones, roots, etc. are removed from excavated soil generated by excavation of the ground in the vicinity of the site. The process of filling a part of the growing soil of the plant consisting of generated soil into the root-entry hole, and at least the seeds of the woody plant among the seeds of the woody plant and the seeds of the herbaceous plant are attached and can be naturally decomposed in the soil. See
The seeds away from the retaining wall and in front of the retaining wall; covering the seed-attached sheet with a net through which the plant trunk can pass and fixing the net together with the sheet; Install the polymer water retention material on the shelf between the net and the front surface of the retaining wall, and install the growing soil in the space between the seat and the front surface of the retaining wall to form a greening base. The natural ecology self-recovery slope method with 3. A rooting hole through which a root of a plant can be inserted is provided in the back ground through the retaining wall, and a pipe is inserted into the rooting hole,
A step of flowing and fixing mortar on the outer surface of the pipe, and a step of mixing fertilizer with the locally generated soil from which the gravel and root system have been removed from the excavated soil produced by excavation of the ground near the site to create a plant growth soil, A step of filling a part of the growing soil in the root-entry holes, and among the seeds of woody plants and seeds of herbaceous plants, at least the seeds of woody plants are attached,
The seed is separated from the retaining wall and placed on the front surface of the retaining wall, the step of covering the seed-attached sheet with a net through which the trunk of the plant can pass, and fixing the net together with the sheet; A natural ecology self-recovery slope method that includes the steps of laying in the gap between the seat and the front of the retaining wall to form a greening base. 4. The sheet is a non-woven fabric, and the sheet is attached to an anchor bolt embedded in a retaining wall or a back ground.
The natural ecological self-restoration slope construction method according to any one of claims 1 to 3, wherein the gut and net are fixed. 5. A natural plant according to claim 1, wherein a vegetation shelf having a substantially L-shaped cross section is connected to a net by a fitting, and the growing soil is packed in the vegetation shelf to secure a horizontal vegetation surface. Ecological self-recovery slope method. 6. A vegetation shelf having a substantially L-shaped cross section is connected to a net by a mounting bracket, and the growing soil is packed in the vegetation shelf to ensure a horizontal vegetation surface, and at the bottom of the V-shaped vegetation shelf is a water retaining system. -The natural ecological self-restoration slope construction method according to any one of claims 1 to 4, wherein a water retaining line is secured by arranging a grate. 7. The natural ecology self-restoration slope method according to claim 1, wherein the rear drainage material is provided on the retaining wall, and the growing soil is laid through the rear drainage material. 8. A process of forming a root-entry hole through which a root of a plant can be inserted in a back ground, and a locally-generated soil obtained by removing gravel and roots from excavated soil produced by excavation of the ground near the site. The process of filling a part of the plant growth soil into the root-entry holes, the process of constructing a grid-shaped concrete frame on the foundation ground, and the embedding of a series of anchor bolts in the horizontal frame of the concrete frame. A step of leaning a shelf board on the anchor bolt to vertically divide the concrete frame work, and a seed of a woody plant, a seed of a herbaceous plant, at least a seed of a woody plant is adhered to the soil, A naturally degradable seam
Of the seeds on the front of the foundation ground by separating the shelves, covering the seeded sheet with a mesh net of a size that allows passage of the plant trunk, and screwing the upper ends of the anchor bolts. , Seeded sheet,
The process of sandwiching and fixing the net on the shelf, and the natural ecological self-restoration slope method in which the above-mentioned growing soil was laid in the space between the net and the front of the foundation ground. 9. A water-retaining polymer material is placed on a shelf board, and a series of anchor wires are stretched around a concrete frame. The net is made of a hard resin net, and a width-fixing wire for hooks at both ends is made of hard resin. The natural ecology self-restoration slope method according to claim 8, wherein the growing soil is laid after connecting the net and the anchor wire. 10. The soil from which gravel and roots have been removed from excavated soil near the site is used as a plant growth soil and is laid on the front of the existing retaining wall to serve as a greening base. The above-mentioned growing soil is packed into the root-entry holes that can be inserted into the roots of plants, and at least the seeds of woody plants among the seeds of woody plants and the seeds of herbaceous plants are attached and can be naturally decomposed in soil. The sea
A natural ecology self-recovery slope structure in which the surface of the greening base is covered with a sheet, and the sheet is covered with a fixed net through which the trunk of the plant can pass. 11. The soil in which gravel, roots, etc. have been removed from the excavated soil in the vicinity of the site and mixed with fertilizer has been laid on the front surface of the existing retaining wall as a plant growth soil, and has been used as a greening base to penetrate the retaining wall It is provided in the back ground, and the above-mentioned growing soil is filled in the root-entry holes through which the roots of the plants can be inserted, and at least the seeds of the woody plants among the seeds of the woody plants and the seeds of the herbaceous plants are adhered to the soil. A seam that can be decomposed naturally
A natural ecology self-recovery slope structure in which the surface of the greening base is covered with a sheet, and the sheet is covered with a fixed net through which the trunk of the plant can pass. 12. The soil in which gravel, roots, etc. have been removed from the excavated soil near the site and mixed with fertilizer is used as a plant growth soil and is laid on the front of the existing retaining wall to serve as a greening base, and penetrates the retaining wall. Insert the pipe into the root-entry hole that can be inserted through the roots of the plant provided on the back ground, pour the mortar on the pipe outer surface and the pipe is fixed to the retaining wall, back ground,
A part of the above-mentioned growing soil is packed in a pipe, and at least woody seeds are adhered among seeds of native plant and herbaceous plant selected based on a plant survey around the site, and seeds of herbaceous plant, A natural ecological self-recovery slope structure in which the surface of the greening base is covered with a sheet made of non-woven fabric that can be naturally decomposed in soil, and the sheet is covered with a fixed net through which the plant trunk can pass. 13. A soil from which gravel and roots have been removed from excavated soil in the vicinity of the site is used as a plant growth soil and is laid on the front of the existing retaining wall to serve as a greening base. The above-mentioned growing soil is packed into the root-entry holes that can be inserted into the roots of plants, and at least the seeds of woody plants among the seeds of woody plants and the seeds of herbaceous plants are attached and can be naturally decomposed in soil. The sea
The surface of the greening base is covered with a sheet, a fixed net through which the trunk of the plant can pass is covered with a sheet, and a vegetation shelf with a substantially inverted L-shaped cross section is connected to the net by a mounting bracket, and the above-mentioned growing soil is vegetated. Natural ecological self-recovery slope structure that is packed in shelves and secures a horizontal vegetation surface.