JPH10159104A - Greening sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a greening sheet which is superior in operation performance at a field and is able to execute quick stable greening. SOLUTION: Flat yarn made of synthetic resin is leno-woven like a reed screen into a net 5, and fiber 6 in cotton-like form is adhered thereto, furthermore banking and greening is executed by attaching a greening sheet 4, which is formed by adhering vegetation base materials 7 such as vegetation seed, fertilizer and soil conditioner to the fiber 6 in cotton-like form by foam-type adhesive, to an inside of a vertical wall 11 of a reinforcing frame 1 made of a rigid mesh formed into L-shape in lateral view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a greening sheet used in, for example, a reinforced embankment greening method for constructing a sloping ground such as a ground or the like, a land preparation, and a retaining wall on a road.

[0002]

2. Description of the Related Art As a conventional reinforcing embankment method, a method using a wall material made of a concrete panel is known. However, the wall material is large in weight and bulky, so that it is only difficult to carry the work. In addition, there was a problem in the handling workability even during construction on site.

[0003] In order to solve such a difficulty, for example, a Nestem method as shown in FIG. 7 has been adopted. In this construction method, a net-shaped geotextile A made of glass fiber impregnated with a synthetic resin is laid on a construction site of a retaining wall near a sloped ground such as a ground,
The embankment B is put on the geotextile A, and a siding C for setting the inclination angle of the retaining wall to be constructed is provided on the side of the embankment B, and the stake C is set on the geotextile A on the side of the embankment B. The sandbags D are stacked in a plurality of stages along the tension C, and the sandbags D are rolled up by the geotextile A after a predetermined number of stacked stages. Further, a retaining wall is constructed by repeating the work of stacking a plurality of sandbags D and winding the sandbags with the geotextile A.

[0004]

However, even when the above-mentioned Nestem method is employed, the work of stacking the sandbags D must be performed manually, and the weight per one sandbag D is required. Since the weight of the sandbags is about 30 kg, stacking these heavy sandbags D in a plurality of stages by hand is extremely labor intensive, and the work of packing or stacking the sandbags D in each sandbag D is performed manually. Therefore, there is also a problem that various works take time and the construction period becomes long.

The present invention has been made in view of such circumstances,
The objective is to provide a greening sheet that is excellent in workability on site and enables early and stable greening.

[0006]

According to the present invention, means for solving the above-mentioned problems are constituted as follows. That is, according to the first aspect of the present invention, the reinforcing frame formed of a rigid mesh formed in an L-shape in side view is stacked in a step shape and the embankment is filled in the reinforcing frame. A greening sheet to be attached to the inside of the fabric and attached to the net, which is made of a synthetic resin material flat yarn and woven in a weft shape by weaving a cotton-like fiber, and furthermore, this cotton-like fiber is used for vegetation. It is characterized in that vegetation base materials such as seeds, fertilizers and soil conditioners are bonded with a foam adhesive.

[0007] The second aspect of the present invention is characterized in that the warp and / or the weft or both of the interwoven woven net according to the first aspect are made of corrosive fibers.

According to the third aspect of the present invention, the weft is a 500-3000 denier flat yarn made of a synthetic resin, and the 300-2000 denier monofilament is a double yarn.
At least 3 or 15 cm of this yarn are aligned to form a warp at intervals of 3 to 15 cm. A cotton fiber is adhered to a net woven in a bark shape by leno weaving, and vegetation such as seeds for vegetation, fertilizer, and soil improvement material is further added to the cotton fiber. It is characterized in that the base material is bonded with a foam adhesive.

According to a fourth aspect of the present invention, there is provided a vegetation base material such as a seed for vegetation or the like attached to the net of the cotton-like fiber according to any one of the first to third aspects of the present invention. Is characterized in that a water-soluble adhesive is used for at least one of the bondings.

[0010] The reinforcing frame made of a rigid mesh is relatively lightweight, excellent in portability, and excellent in shape retention. Therefore, the workability on site is good, and the retaining wall having a steep slope is required. It can be easily formed and effectively prevents runoff of the soil even by rainfall and the like, and the embankment is stabilized.

The work is carried out by laying a reinforcing frame on a slope, fixing it with an anchor or the like, applying an embankment thereon, solidifying the embankment, and then stacking the reinforcing frame and the embankment in the same manner. In this case, the work of embankment or hardening can be efficiently performed using a bulldozer or a rammer.

[0012] Since leno weave nets cause misalignment, they do not hinder plant growth. For example, as the trunk of a woody tree that has passed the eyelashes once grows, the net becomes misaligned, and the eyelashes naturally follow and expand. Also, if the net is made of corrosive fibers,
Without inhibiting the growth of plants, after net corrosion
Plants can easily enter from the surroundings.

By adhering the cotton-like fibers to the net with a water-soluble adhesive, the water retention is improved, the drying of the vegetation seeds can be prevented even on the steep retaining wall, and the cotton-like fibers can be prevented. Since the vegetation base material is adhered to the fibers with a foam adhesive, the vegetation seeds can be detached relatively early and adhere to the soil, and early stable greening can be achieved.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a retaining wall for explaining a reinforcing embankment greening method, FIG. 2 is an exploded perspective view of a reinforcing frame and a greening sheet, and FIG. 3 is a longitudinal sectional view of the retaining wall. Reference numeral 1 denotes a reinforcing frame made of a rigid mesh formed in an L shape when viewed from the side, 11 denotes an elevation of the reinforcing frame 1, 1
2 is a bottom surface, 2 is a grounding net connected to the bottom surface 12, 3 is an embankment, 4 is a greening sheet attached to the inside of the vertical surface 11 of the reinforcing frame 1 with a water-soluble adhesive, and is made of synthetic resin. A vegetation base material 7, such as seeds for vegetation, fertilizer, soil improvement material, etc., is foamed on a cotton-like fiber 6 attached by a water-soluble adhesive to a net 5 formed by interweaving a flat yarn into an interwoven weave. It is bonded with a water-soluble adhesive.

A suitable material for the reinforcing frame 1 is a so-called expanded metal mesh.
It is preferable that the height of 1 is 50 cm, the width is 50 to 200 cm, and the depth of the bottom surface 12 is about 30 cm. Such a reinforcing frame 1 is relatively lightweight, excellent in portability, and also has shape retention,
As described later, construction workability on site is extremely good, steep slopes can be easily formed, and soil runoff and collapse can be effectively prevented. It goes without saying that the dimensions of the reinforcing frame 1 may be appropriately selected and set according to the construction conditions.

The grounding net 2, which is connected to the bottom surface 12 of the reinforcing frame 1 by an anchor 9, a peg, or the like, is preferably a net having a relatively large mesh and high tensile strength, which is more durable than a general vegetation net. What is necessary is just to lay a thing which woven a plastic material such as polypropylene, a monofilament such as glass fiber, or a flat yarn over a depth of about 3 to 5 m. By integrating such a grounding net 2 with the bottom surface 12 of the reinforcing frame 1, the reinforcing frame 1 can be held firmly against soil. Note that the grounding net 2 and the bottom surface 12 of the reinforcing frame 1 may be connected in advance with a string or the like.

The net 5 attached to the inside of the upright surface 11 of the reinforcing frame 1 is shown in FIGS. 4, 5A, 6B, 6A, and 6B, for example. 3,000 denier synthetic resin flat yarn 51 is used as the weft,
Two or more monofilaments 52 of ２０００2000 denier are aligned to form warp yarns having an interval d of 3 to 15 cm, and these are woven in an interlace form by leno weaving.
At the time of weaving, the flat yarn 51 is a weft yarn, and the monofilament 52 is a warp yarn.
In this state, the flat yarns 51 are arranged in the vertical direction, and the monofilaments 52 are arranged in the horizontal direction. FIG.
(A), (B) and FIGS. 6 (A), (B) show a configuration assuming weaving.

In the net 5 shown in FIG. 5A, monofilaments 52, which are six warp yarns, are weaved at predetermined intervals d with respect to flat yarns 51, which are weft yarns. 3 on each side of the flat yarn 51
A twist 53 is applied once between the flat yarns 51 while exchanging monofilaments 52 of the book. Such a net 5 has its respective flat yarn 5
Since... Easily cause misalignment, the growth of the plant is not inhibited. That is, each flat yarn 5
When the stem of the plant 10 that has passed between 1, 51 once grows to an enlarged size, the eye contact is reasonably enlarged following the growth (see FIG. 3).

In the net 5 shown in FIG. 5B, two flat filaments 51,.
2 and 52 are entangled and woven at predetermined intervals d. Each flat yarn 5 is crossed with one monofilament 52 on both sides of the flat yarns 51.
Twist 53 is given once between 1 and 51. In addition,
The leno weave of the net 5 may be alternately combined with the leno weave shown in FIG.

In the net 5 shown in FIG. 6A, a core 54 made of paper is arranged together with the flat yarn 51, and three monofilaments 5 are provided on both sides of the front and back.
Are entangled and woven at predetermined intervals d. Each flat yarn 51 is crossed with three monofilaments 52 on both the front and back sides of each flat yarn 51.
Twist 53 is given once between 1 and 51. Also,
In the net 5 shown in FIG. 6B, three monofilaments 52,... Are alternately crossed between the flat yarns 51,. Although not shown, the net 5 having one to three warps in one row between two to five warps (at the time of manufacture) allows the weft in one row to be warped when used. In addition, it becomes easy for the eyes to be misaligned laterally, and the growth of the plant can be prevented from being further inhibited.

Examples of the material of the cotton-like fibers 6 to be attached to the net 5 with a water-soluble adhesive such as polyvinyl alcohol include natural fibers such as cotton, silk and hemp, which are decomposed and corroded with time by microorganisms. And biodegradable chemical fibers such as viscose rayon. There are water-soluble films made of polyvirni alcohol and dispersible non-woven fabric made of soft cloth, as well as these water-soluble films and dispersible non-woven fabrics and kayaks. It may be a partially soluble fiber obtained by laminating ground or the like. Alternatively, pulp fibers 30 to 50
%, Polypropylene fibers 35 to 45%, and fibrous polyvinyl alcohol 10 to 30%.

The vegetation base material 7 to be adhered to such flocculent fibers 6 includes various vegetation seeds such as wild grass species, woody plants, and pasture species, general fertilizers, and organic materials such as bark compost and peat moss. Inorganic materials such as vermiculite and perlite,
It may be made of a soil improving material such as a superabsorbent polymer or the like, and the adhesive may be made of a foamed water-soluble adhesive made of, for example, polyvinyl alcohol (PVA).

In order to construct the greening sheet 4 integrated with the reinforcing frame 1 as described above, the bottom surface 12 of the reinforcing frame 1 is laid on the ground, fixed together with the ground sheet 2 with the anchor 9,
The embankment 4 is applied thereon with a bulldozer or the like, and after solidifying it with a rammer or the like, the reinforcement frame 1, the grounding sheet 2, and the embankment 4 may be successively stacked on the embankment in a similar manner. Due to the work done, the steep retaining wall can be formed very efficiently on short days.

After the construction, the reinforcing frame 1 connected to the grounding sheet 2 stably held between the embankments 3 and 3 prevents the soil from flowing and falling even by severe wind and rain.
In addition, frost heaving due to snowfall is prevented, and a stable and strong retaining wall is formed. By adhering the cotton-like fiber 6 to the net 5 with a water-soluble adhesive, water retention becomes good, and even when a steep retaining wall is formed, it is possible to prevent drying of vegetation seeds. it can.

Further, since the vegetation base material 7 is adhered to the cotton-like fiber 6 by the foamed water-soluble adhesive, the vegetation base material 7 can be detached relatively early and fixed on the soil. Combined with the above-described effect of preventing drying, reliable and stable greening can be achieved even on a steeply inclined surface. In the above embodiment, the water-soluble adhesive is used for both the adhesion of the cotton-like fibers 6 to the net 5 and the adhesion of the vegetation bases 7 to the cotton-like fibers 6. Only a water-soluble adhesive may be used.

[0026]

As described above, according to the present invention, the reinforcing frame to which the greening sheet is adhered is made of a rigid net, and is relatively lightweight, excellent in portability, and excellent in shape retention. The workability on site is good, steep retaining walls can be easily formed, and soil runoff can be effectively prevented even by rainfall, and the embankment is stabilized.

Further, since the net is made of leno net for the greening sheet, the net is misaligned, so that the growth of the plant is not hindered. Alternatively, by forming the net with corrosive fibers, growth inhibition of the plant is avoided, and after the net is corroded, the plant can easily enter from the periphery.

Since the cotton-like fibers are bonded to the net with a water-soluble adhesive, the water retention becomes good, and the drying of the vegetation seeds can be prevented even on a steep retaining wall.
Also, since the vegetation base material is adhered to the flocculent fiber with the foam adhesive, the vegetation seeds can be detached relatively early and closely adhered to the soil, and early stable greening can be achieved. Alternatively, substantially the same effect can be obtained by using a water-soluble adhesive for either the adhesion of the cotton-like fiber to the net or the adhesion of the vegetation base material to the cotton-like fiber.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a retaining wall for describing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the reinforcing frame and a greening sheet.

FIG. 3 is an explanatory diagram of the retaining wall.

FIG. 4 is a partially cutaway perspective view of the greening sheet.

FIGS. 5A and 5B are plan views showing examples of the configuration of a net.

FIGS. 6A and 6B are plan views showing other examples of the configuration of the net.

FIG. 7 is a sectional view of a conventional retaining wall.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reinforcement frame, 11 ... Erect surface, 4 ... Greening sheet, 5 ... Net, 51 ... Flat yarn, 6 ... Cotton fiber, 7 ... Vegetation base material.

Claims (4)

[Claims] 1. A reinforcing embankment greening method in which a reinforcing frame formed of a rigid mesh formed in an L-shape in side view is stacked in a step-like manner and embankment is filled in the reinforcing frame. A greening sheet for construction, in which flat yarn of synthetic resin material is woven in an interdigitated weave by weaving a cotton-like fiber, and seeds for vegetation, fertilizer, soil improvement A greening sheet comprising a vegetation base material such as a wood material adhered with a foam adhesive. 2. The greening sheet according to claim 1, wherein the warp yarn and / or the weft yarn of the interwoven woven net are made of corrosive fibers. 3. A weft of 500 to 3000 denier flat yarn made of a synthetic resin, and two or more 300 to 2,000 denier monofilaments are aligned to 3 to 15 c.
As warp yarns at m intervals, glue the cotton-like fiber to the interwoven woven net by weaving, and further to this cotton-like fiber,
A greening sheet comprising a vegetation base material such as seeds for vegetation, a fertilizer, and a soil conditioner, which is bonded with a foam adhesive. 4. A water-soluble adhesive is used for at least one of adhesion of the flocculent fiber to the net and adhesion of the vegetation base material such as a vegetation seed to the flocculent fiber. The greening sheet according to any one of claims 1 to 3, wherein