JP2011122403A - Retaining wall for slope protection and seeding and planting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retaining wall for slope protection and seeding and planting made of gabions suitable for slope protection work associated with seeding and planting. <P>SOLUTION: The retaining wall for seeding and planting is formed by laying gabion structures 1A, 1B in one or more stages along a slope. The gabion structures 1A, 1B are formed by disposing base mats 4 with water absorbing and retaining properties at the upper face portions of the gabions 2 filled with cobblestones 3, and installing vegetation mats 5 with plant seedlings or seeds planted, on top of the base mats 4. Porous permeation sheets 6 having water permeability but preventing the outflow of soil are interposed between the gabion structures 1A, 1B and soil 23 of the slope. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a retaining wall for slope protection and greening suitable for slope protection work with greening, and more particularly, to a retaining wall for slope protection and greening constructed using a stone fence. is there.

In reinforcement work on slopes in revetment work and roadside work, that is, slope protection work, usually, metal mesh stonework such as gabions and futon crabs are used. This stone-packed cage is a circular or quadrangular wire mesh container, and is built with one or more steps on the slope with crushed stones inside, and a retaining wall for slope protection is constructed. However, when the built retaining wall is in a natural environment such as a bank, a shoulder or a slope of a mountain, it is desirable to make the stone clogs inconspicuous by greening. Patent Document 1 and Patent Document 2 show an example in which a square stone claw is used for slope protection work.
However, as described above, the stone-filled rice cake filled with chestnut stone is excellent in water permeability but has little water retention, so it is almost impossible to plant and grow it directly. For this reason, it is very difficult to greenen the retaining wall constructed of stone-clad mushrooms.

No. 7-499 No. 7-28181

  The technical problem of the present invention is to provide a retaining wall for slope protection and greening made by Ishizume Coffee, which has both a slope protection function and a greening function.

  In order to achieve the above object, the retaining wall for greening of the present invention is formed by laying one or more steps of a stone-packed cage structure along a slope, and the stone-packed cage structure is made of a wire mesh filled with chestnut stone. It is formed by placing a base mat having water absorption and water retention on the upper surface portion of the stone custody of this stone, and placing a vegetation mat planted with plant seedlings or seeds on the base mat. A porous water-permeable sheet that allows moisture from the soil to pass therethrough but prevents the outflow of the soil is interposed between the stone packed cocoon structure and the sloped soil.

Preferably, in the present invention, the stone claw structure is stacked in a plurality of stages, and the upper stone clog structure and the lower stone claw structure are arranged stepwise by shifting the position back and forth. The base mat is disposed over the entire upper surface portion of each stone paddle, and the vegetation mat is exposed to the base mat in an exposed portion of the top surface portion of each stone paddle that is not covered with the upper stone paddle. The water-permeable sheet is disposed on the first sheet portion positioned along the bottom surface of the stone-packed cage structure, and the second sheet portion positioned along the side surface contacting the soil of the stone-packed cage structure And having
More preferably, the water-permeable sheet has a third sheet portion that is bent toward the upper surface side or the soil side of the stone-packed ridge structure at the upper end of the second sheet portion.

  In the present invention, the stone custody is composed of a container-shaped trunk net whose upper surface is open and a lid net that closes the upper surface of the trunk net, and the upper part of the chestnut filled in the trunk net or the lid The base mat and the vegetation mat are disposed on top of the net.

  The base mat can be formed by filling a water retaining material in a porous outer skin made of a fiber sheet.

  According to the present invention, a stone paddle filled with chestnut stone, a base mat having water absorption and water retention, a vegetation mat planted with plant seedlings or seeds, water from the soil is allowed to pass but the outflow of the soil is inhibited. By combining the water permeable sheet organically, a slope protection and greening retaining wall having both a slope protection function and a greening function can be easily constructed.

It is sectional drawing which shows one Embodiment of the retaining wall which concerns on this invention. FIG. 2 is a perspective view of a stone claw structure used to construct the retaining wall of FIG. 1. FIG. 3 is a cross-sectional view taken along the longitudinal direction of the stone-packed cage structure of FIG. It is sectional drawing along the transversal direction of the stone cradle structure of FIG. It is a partial expanded sectional view of a base mat. It is a top view which shows the other structural example of a stone-packed ridge structure. It is sectional drawing along the transversal direction of the stone packed bowl structure of FIG.

FIG. 1 shows an embodiment of a slope protection and greening retaining wall according to the present invention. The retaining wall is formed by stacking square block-shaped stone-clad structures 1A, 1B in a plurality of stages, and between each stone-clad structure 1A, 1B and the soil 23 and above and below the stone-clad structures. It is constructed by interposing a porous water-permeable sheet 6 between 1A and 1B, and is formed in a staircase shape as a whole by shifting the positions of the upper and lower stone-clad casket structures 1A and 1B back and forth. Yes.
A plurality of the stone-packed casket structures 1A, 1B are connected in the left-right direction (the direction perpendicular to the paper surface), but their illustration is omitted.

  As shown in FIG. 2 to FIG. 4, the stone packed casket structures 1 </ b> A and 1 </ b> B are typically filled with chestnut stone 3 as shown for the uppermost (first stage) stone packed casket structure 1 </ b> A. It is formed by the above-mentioned stone-packed cage 2 made of wire mesh, preferably made of diamond-shaped wire mesh, and a base mat 4 and a vegetation mat 5 disposed on the upper surface of the stone-packed cage 2.

The stone cradle 2 is composed of a shell container 7 having a rectangular container shape whose upper surface is open, and a cover mesh 8 that closes the upper surface of the shell mesh 7. The plan view shape of the shell mesh 7 and the cover mesh 8 is as follows. Is a rectangle that is long in one direction.
The trunk net 7 includes a bottom net 10 having a rectangular shape that is long in one direction, opposed first and second side nets 11 and 12 connected to the long sides of the bottom net 10, and the bottom net 10. It consists of opposing third and fourth side nets 13, 14 connected to the short side. Accordingly, the lateral length of the first and second side nets 11 and 12 is longer than the lateral length of the third and fourth side nets 13 and 14.

When the trunk net 7 is formed, the bottom net 10 and the side nets 11, 12, 13, and 14 are separately formed, and the bone wires 16 attached around each are connected to each other by wires, clips, screw stoppers, or the like. Even if the trunk net 7 is formed by connecting with the connecting metal fitting 17, the bottom net 10 and the first and second side nets 11 and 12 are formed in series with one rhombus metal mesh, The trunk net 7 may be formed by forming the third and fourth side nets 13 and 14 separately and assembling them into a container shape.
Further, the connection between the trunk net 7 and the lid net 8 is performed by connecting a bone line 18 attached around the lid net 8 and a bone line 16 attached to the upper ends of the side nets 11, 12, 13, and 14. It is performed by connecting with the connecting bracket 17 described above.

  As shown in FIG. 5, the base mat 4 is formed by filling a water retaining material 21 in a hollow outer skin 20 made of a flexible fiber sheet having a porous property such as a woven fabric or a non-woven fabric and having water absorption and water retention. The formed mat is a flat plate having a rectangular shape in plan view, and has good water absorption and water retention as a whole mat and moisture permeability by capillary action.

  Examples of the water retaining material 21 include ordinary earth and sand, and porous granular soil used in hydroponics of foliage plants (hydroculture), which are mixed individually or in appropriate amounts. Used in. The shape of the water retaining material 21 is not particularly limited as long as it can be formed into a flat plate shape as a whole mat, such as a granular shape, a powder shape, or a rod shape. Furthermore, a highly water-absorbing polymer material that has recently been used as a soil water retaining material for greening deserts can also be used. Alternatively, an appropriate amount of the superabsorbent polymer material can be used by mixing it with ordinary soil or porous granular soil.

In addition, in the above-mentioned granular soil, there are those in which the viscosity is heated and foamed to form particles, those in which charcoal is granulated, those using natural zeolite, and the like, which are preferable when they are used as the water retention material 21. The particle size is about 1 to 5 mm, more preferably about 2 to 3 m.
The thickness of the base mat 4 is preferably equal to or greater than the vegetation mat 5.

  On the other hand, the vegetation mat 5 is formed by planting seedlings or seeds of a plant on a flexible fiber sheet such as a nonwoven fabric having water absorption and water retention, and has a rectangular shape in plan view. The plant used here is preferably a plant whose rhizome crawls near the ground surface, such as turf.

Here, in the stone packed wall structure 1A located on the first stage of the retaining wall, the base mat 4 is placed on the chestnut 3 filled in the trunk net 7. The vegetation mat 5 is placed on the entire upper surface of the base mat 4 so as to cover almost the entire area inside the trunk net 7. The lid net 8 is attached to the upper surface of the trunk net 7 so as to cover the base mat 4 and the vegetation mat 5. Therefore, although the base mat 4 and the vegetation mat 5 are disposed inside the stone cradle 2, the disposition position is substantially the upper surface portion of the stone cradle 2.
The base mat 4 and the vegetation mat 5 may be connected to each other by a connection fitting such as a wire.

  On the other hand, in the stone custody structure 1B of the second and lower stages of the retaining wall, the base mat 4 is disposed over almost the entire area inside the stone custody 2 as shown in FIG. However, the vegetation mat 5 is disposed only in the exposed portion that is not covered with the upper stone-filled cage structure 1A or 1B, or only in the exposed portion and the vicinity thereof. .

  In the stone claw structures 1A and 1B, at least one side of the base mat 4 faces downward along the side net, that is, the side surface of the stone claw 2 inside or outside the side net of any one of the stone claw 2. It may be bent. When the base mat 4 is extended to the outside of the side net and bent downward, a plurality of cuts are made at the end of the base mat 4, and the strip-shaped portion is clogged from the net of the side net. What is necessary is just to be led out to the outside of the ridge and bent downward. Moreover, it is desirable to make this strip-shaped part contact the said water-permeable sheet 6, and it is especially desirable to make it contact the 2nd sheet | seat part 6b (refer FIG. 1) interposed between the stone paddle 2 and soil. . Therefore, in this case, the strip-shaped part is formed on the first side net 11 side in contact with the soil 23 among the four side nets of the stone packed basket 2.

  Further, the water permeable sheet 6 has water permeability, and the water in the soil 23 circulates or exudes toward the side of the stone packed cocoon structures 1A and 1B, but prevents the soil 23 from flowing out. It is formed of fiber sheets such as nonwoven fabrics and woven fabrics, nets having fine meshes, perforated sheets made of synthetic resin with a lot of fine holes, etc., and arranged separately for each stone-packed ridge structure 1A, 1B ing. The water permeable sheet 6 is adjacent to the first sheet portion 6a extending laterally along the bottom surface of the stone claw structures 1A and 1B, that is, the bottom net 10, and the soil 23 of the stone clog structure 1A and 1B. The second sheet portion 6b extending vertically along the side surface of the first side net 11, and the third sheet portion 6c extending horizontally from the upper end of the second sheet portion 6b toward the soil 23 side. The third sheet portion 6c is in contact with the lower surface of the first sheet portion 6a of the water-permeable sheet 6 disposed along the upper stage stone stalagmite structure.

  However, the third sheet portion 6c can be extended along the upper surfaces of the stone-packed ridge structures 1A and 1B, that is, the lid net 8 by bending in the direction opposite to the illustrated direction. In this case, the third sheet portion 6c is sandwiched between the upper and lower stone claw structures in the second stage and lower stone claw structures 1B.

  In addition, the first sheet portion 6a of the water-permeable sheet 6 does not necessarily extend over the entire bottom surface of the stone-filled ridge structure 1A, 1B, and does not overlap with the bottom stone-filled ridge structure 1B. It is sufficient that it is formed at least.

  In the retaining wall thus formed, moisture is directly supplied to the base mat 4 of each stone cave structure 1A, 1B by rain or the like, or flows down the slope or exudes from the soil 23 through the water-permeable sheet 6. When moistened water is supplied to the base mat 4, the water is absorbed by the base mat 4 and stored in the internal water retaining material 21.

On the other hand, plant seedlings or seeds planted on the vegetation mats 5 of the stone-packed cocoon structures 1A and 1B are supplied with moisture directly from the base mat 4 or through the vegetation mat 5 so that these vegetation mats 5 It grows gradually while sticking roots between the base mat 4 and the base mat 4 through the outer skin 20, and the entire retaining wall is greened.
At this time, the base mat 4 also serves as a breeding floor for the plant to grow with roots, but since moisture is stored by the water retention material inside the plant, the moisture is stabilized against the plant. Can be continuously supplied and functions effectively for a long time for plant growth.

  Further, the water in the soil 23 is discharged through the water-permeable sheet 6 toward the stone-packed cocoon structures 1A and 1B without trouble, and part of the water is absorbed and stored in the base mat 4 and used for greening. Is done. On the other hand, the soil 23 is blocked by the water-permeable sheet 6 and is prevented from flowing out to the side of the stone-packed cage structure 1A, and stops at that position. As a result, the slope is stabilized by efficient drainage and reliable earth retaining.

The base mat 4 need not be a single piece and may be divided into a plurality of pieces. Similarly, the vegetation mat 5 may be divided into a plurality of parts.
Further, the base mat 4 is not necessarily arranged over the entire upper surface of the stone cradle 2. Depending on the size of the stone cradle structures 1 </ b> A and 1 </ b> B and their installation mode, etc. It is also possible to dispose only in the region of the part. However, the vegetation mat 5 is always disposed on the base mat 4.

  In the above-described embodiment, the base mat 4 and the vegetation mat 5 are disposed inside the stone claw 2. However, the base mat 4 and the vegetation mat 5 are disposed outside the stone claw 2. You can also. FIG. 6 and FIG. 7 illustrate a stone claw structure 30 formed by disposing the base mat 4 and the vegetation mat 5 outside the stone clog 2.

  The illustrated stone packed casket structure 30 is disposed in the first stage of the retaining wall in the same manner as the stone packed casket structure 1A shown in FIG. The vegetation mat 5 is placed over the entire upper surface of the base mat 4 and placed over the entire upper surface of the net 8. And the polymer of the said base mat 4 and the vegetation mat 5 was spanned between the side net | network 11,12 or 13,14 which opposes across the upper surface of this polymer to a longitudinal direction and a transversal direction. It is fixed to the stone bowl 2 by a fixing member 26 made of a plurality of wires.

In this case, as shown in the drawing, the end portion of the base mat 4 can be bent downward along the outer surface of the stone cradle 2 and the bent portion can be brought into contact with the water permeable sheet 6 as the water absorbing portion 4a. . By comprising in this way, after the water | moisture content in the soil 23 permeate | transmits the said water-permeable sheet 6, it becomes easy to be taken in in the base | substrate mat 4 through this water absorption part 4a.
In the illustrated example, the vertical width H of the water absorbing portion 4a is formed to be about 1/3 of the vertical width (height) of the side surface net 11 of the stone cradle 2. However, the vertical width H is not particularly limited. Alternatively, it may be about ½ of the vertical width of the side net 11 or may be the same as the vertical width of the side net 11.

The rest of the structure of the stone packed bowl structure 30 is substantially the same as that of the stone packed bowl structure 1A shown in FIGS. The same reference numerals are used and the description thereof is omitted.
In the case of configuring the stone packed cocoon structure 30 to be installed in the second stage or less of the retaining wall, the base mat 4 is placed over the entire upper surface of the lid net 8 in the stone packed cocoon 2 and the vegetation mat 5 is disposed on the base mat 4 in an exposed portion (see FIG. 1) which is not covered with the upper stone claw structure 1A or 1B of the upper stone crush 2.
Also in this stone packed bowl structure 30, the base mat 4 may be disposed only on a part of the upper surface of the stone packed bowl 2 depending on the installation mode and the like.

  Further, in the stone packed basket structure 30, instead of fixing the base mat 4 and the vegetation mat 5 with the wire fixing member 26 as described above, the size of the stone packed basket 2 is the same as that of the stone packed basket 2 from above the vegetated mat 5. It is also possible to cover the mesh plate made of a wire mesh and connect the periphery of the mesh plate to an appropriate position of the stone cradle 2 with a metal fitting such as a wire. In this case, the mesh plate forms the fixing member 26. The mesh plate can be the same as the lid mesh 8, but the mesh may be larger than the lid mesh 8.

  In the illustrated embodiment, a plurality of stages of stone packed bowl structures are stacked, but this stone packed bowl structure may have only one stage. In this case, preferably, the base mat 4 and the vegetation mat 5 are disposed over almost the entire upper surface portion of the stone cradle 2 as in the case of the uppermost stone cradle structure 1A in the retaining wall of FIG. The

DESCRIPTION OF SYMBOLS 1A, 1B, 30 Ishizume clan structure 2 Ishizume clan 3 Kuriishi 4 Base mat 5 Vegetation mat 6 Water-permeable sheet 6a 1st sheet part 6b 2nd sheet part 6c 3rd sheet part 7 Trunk net 8 Lid net 20 Outer skin 21 Water retention Material 23 Soil

Claims (5)

It is a retaining wall for slope protection and greening formed by laying one or more steps of stone-packed fence structures along the slope,
In the stone-packed cocoon structure, a base mat having water absorption and water-retaining properties is disposed on the upper surface of a wire mesh stone-packed jar filled with chestnut stone, and a vegetation mat in which plant seedlings or seeds are planted is disposed. Formed by stacking on this base mat,
Slope protection, characterized in that a porous water-permeable sheet is interposed between the stone-packed cocoon structure and the sloped soil to allow moisture from the soil to pass but prevent the soil from flowing out. Retaining wall for greening. The stone cradle structure is stacked in a plurality of stages, and the upper stone cradle structure and the lower stone cradle structure are arranged stepwise by shifting the position back and forth,
The base mat is disposed over the entire upper surface portion of each stone custody basket,
The vegetation mat is disposed on the base mat in an exposed portion of the upper surface portion of each stone cradle that is not covered with the upper stone cradle,
The water-permeable sheet has a first sheet portion positioned along the bottom surface of the stone-packed cocoon structure and a second sheet portion positioned along a side surface in contact with the soil of the stone-packed cocoon structure. The retaining wall for greening according to claim 1.   3. The greening sheet according to claim 2, wherein the water-permeable sheet has a third sheet portion that is bent toward the upper surface side or the soil side of the stone-packed ridge structure at the upper end of the second sheet portion. Retaining wall.   The stone custody is composed of a container-shaped trunk net whose upper surface is open and a lid net that closes the upper surface of the trunk net, and is formed on the top of the chestnut filled in the trunk net or on the top of the lid net. The greening retaining wall according to any one of claims 1 to 3, wherein the base mat and the vegetation mat are arranged to overlap each other.   5. The greening retaining wall according to claim 1, wherein the base mat is formed by filling a water-retaining material in a porous outer skin made of a fiber sheet.

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