JP6975999B2 - Slope protection equipment and slope protection method - Google Patents

Description

The present invention relates to, for example, a slope protection tool for protecting a slope such as a slope and a slope protection method.

A slope where a slope protection tool consisting of a bag-shaped body containing vegetation seeds (seed of a plant for greening) and a net-shaped member to which a plurality of the bag-shaped bodies are mounted is installed on a slope (slope). Protective work is known (Patent Document 1).

In this slope protection work, the vegetation basement is formed in small steps on the mountain side of the bag-shaped body due to the runoff sediment accumulated by being blocked by the bag-shaped body, the leaves of trees from the surroundings, etc., and it becomes easy for plants to grow in this small step. Due to the so-called small step effect, greening will be realized early and well. That is, the small step effect referred to here is an effect in which a growth base layer having a gentler gradient than the slope is formed in a small step shape due to the accumulation of earth and sand, and plants are easily grown in this small step.

However, the base material in the bag-shaped body used in this slope protection work is mainly composed of organic matter and vermiculite, and the organic matter is consumed or vermiculite shrinks over time, and the base material is severe depending on the construction environment. Vermiculite may occur. Then, in this case, the vegetation base constituting the small step is washed away from the gap created between the slope and the bag-shaped body of the slope protection tool installed on this slope and from the upper side of the bag-shaped body due to this reduction. -There is a problem that the vegetation base is not formed on the mountain side of the bag-shaped body due to slipping down, and as a result, the small step effect cannot be obtained.

Therefore, it is conceivable to include a curing material that is cured by water absorption in the base material or the bag-shaped body. If the cured material is cured by rainfall or the like, the shape of the bag-like body is maintained, so that it is possible to prevent the loss of the step effect.

Japanese Unexamined Patent Publication No. 2007-56606

However, in the above-mentioned conventional slope protection tool, the hardening material absorbs moisture and moisture inside and outside the bag-shaped body and hardens before laying on the slope, and the bag-shaped body becomes uneven on the slope after laying on the slope. There is a possibility that a sufficient small step effect cannot be obtained because it does not adhere to the surface. Examples of the water / moisture source in the bag-shaped body include vegetation base materials such as fertilizer contained in the bag-shaped body, cotton, and glue used for adhesion.

The present invention has been made with the above-mentioned matters in mind, and an object of the present invention is to provide a slope protection tool and a slope protection method capable of obtaining a small step effect in a good and reliable manner.

In order to achieve the above object, the slope protection tool according to the present invention is a hardened bag in which a curing material is contained in a bag-shaped body having water permeability or moisture permeability, and a bag-shaped body having water permeability or moisture permeability for greening. A base bag containing plant seeds or growth aids or soil improvers containing the hardened material , a substantially rectangular net-like member, and the hardened material prior to laying on the slope. A slope protection tool provided with a desiccant for absorbing moisture and moisture to prevent curing, and the curing bag and the curing bag arranged at appropriate intervals in the longitudinal direction of the net-like member. said substrate bag held by the net-like member, that the desiccant is in its entirety is accommodated in the sealed bag in a state held by the net-like member before laying the slope, the bag-like body It has a flexibility of more than a degree that can be stretched along the unevenness of the slope (claim 1).

In the slope protection tool, the desiccant is held in the net-like member in a state of being contained in a hygroscopic bag having water permeability or moisture permeability and containing only the desiccant, and is contained in the sealed bag. It may be (Claim 2).

On the other hand, in order to achieve the above object, in the slope protection method according to the present invention, the slope protection tool according to claim 1 or 2 is laid on the slope.

In the present invention, a slope protection tool and a slope protection method capable of obtaining a small step effect in a good and reliable manner can be obtained.

That is, in the slope protection tool of the invention according to each claim of the present application, the desiccant prevents or reduces the hardening material from absorbing moisture and moisture in the slope protection tool before laying on the slope. As a result, when the slope protection tool is laid on the slope, the bag-shaped body adheres to the unevenness of the slope and hardens in that state, so that the small step effect based on this bag-shaped body can be obtained well and surely. Can be done.

In the slope protection tool of the invention according to claim 1, it is possible to prevent the curing material from being cured in the slope protection tool before it is laid on the slope.

In the slope protection method of the invention according to claim 3, the small step effect can be obtained satisfactorily and surely by the slope protection tool.

(A) is a perspective view schematically showing the configuration of the developed state of the slope protection tool according to the embodiment of the present invention, and (B) is an explanatory view showing a method of accommodating the slope protection tool. It is explanatory drawing which shows the structure of the bag-like body of the mortar bag of the slope protection tool schematically. (A) is a vertical cross-sectional view schematically showing the installation state of the slope protection tool, and (B) and (C) are explanations schematically showing the change in the state of the slope protection tool laid on the slope. It is a figure. (A) and (B) are explanatory views schematically showing the pre-formation and post-formation configurations of the modified example of the bag-shaped body. (A) and (B) are explanatory views schematically showing the pre-formation and post-formation configurations of the other modified examples of the bag-shaped body. (A) and (B) are explanatory views schematically showing the structure of still another modification of the bag-like body, respectively. It is explanatory drawing which shows the structure of another modification of the slope protection tool schematically. (A) and (B) are explanatory views schematically showing the change of the state of the slope protection tool of FIG. 7 laid on the slope. (A) and (B) are explanatory views schematically showing the structure of the modification of the slope protection tool, respectively.

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

In the slope protection method according to the present embodiment, the slope protection tool 1 shown in FIG. 1 (A) is laid on the slope N (see FIG. 3 (A)) which is an example of the slope to protect the slope N and protect the slope N. It is for greening.

As shown in FIG. 1A, the slope protection tool 1 includes a net-shaped member 2 having a substantially rectangular shape, and a mortar bag 3 and a base material bag 4 held (mounted) on the net-shaped member 2. ..

The net-shaped member 2 has accommodating portions 5 at appropriate intervals in the longitudinal direction. Here, the net-shaped member 2 of this example is, for example, a member having a width of 1 m and a vertical length of 5 to 10 m, and the accommodating portions 5 are provided at intervals of 30 cm in the vertical direction. That is, in FIG. 1A, only a part of the net-like member 2 (slope protection tool 1) appears. Then, the mortar bag 3 or the base material bag 4 is independently housed in each storage unit 5. In the examples shown in FIGS. 1 (A) and 3 (A), the mortar bag 3 is housed in one of the three storage sections 5, and the base material bag 4 is housed in the remaining storage section 5. The accommodating portion 5 is formed in a bag shape, a tubular shape, or a pocket shape having a size sufficient to accommodate the mortar bag 3 or the base material bag 4, and each of the bags 3 and 4 is one end of the accommodating portion 5. It is inserted into the interior from the side, whereby the bags 3 and 4 are held by the net-like member 2.

The net-like member 2 uses fibers having high durability (for example, fibers such as nylon, polyester, aramid, carbon, glass, polyacetal, etc.) or corrosive fibers (for example, fibers such as palm), and has a mesh size of 5 to 10 mm. It is molded to a certain extent, and both of these (durable fibers and corrosive fibers) may be superposed. Further, in order to improve the strength, a wire mesh (for example, a hexagonal wire mesh or a lath wire mesh) may be superposed on the net-shaped member 2.

As shown in FIG. 1 (A), the mortar bag 3 is a dry mortar (an example of a curing material) that is cured by water absorption into a bag-shaped body 3a having an elongated tubular shape with both ends closed and having water permeability or moisture permeability. Since it contains 3b and does not contain a material that creates voids in the bag-shaped body 3a (for example, a material such as a base material that decreases over time due to elution of fertilizer components), the strength is increased. be able to. The dry mortar 3b of this example is a mixture of cement and granular sand as an aggregate, but the aggregate constituting the dry mortar 3b is not limited to sand, but vermiculite, perlite (pumice stone), or the like is used. be able to. The contents to be contained in the bag-shaped body 3a can be made into a high-strength cured bag by containing only a cured material that is cured by water absorption or moisture absorption, or by mixing the cured material with only an aggregate. Further, a reinforcing material such as steel fiber may be mixed with the dry mortar so that the effect of improving the strength of the cured mortar bag 3 can be obtained.

Here, the filling amount of the contained material in the bag-shaped body 3a is set to be 80 to 160% by weight when the rough filling is 100%. Rough filling is to fill the bag-shaped body 3a by spontaneously dropping the contained material, and is a method generally used when measuring "loose bulk density". When the filling amount of the contained material in the bag-shaped body 3a exceeds 160%, the strength is good, but the flexibility of the mortar bag 3 is lost, it becomes difficult to follow the slope N, and the material cost is extra. You will need it. On the contrary, when the filling amount is less than 80%, the mortar bag 3 becomes more familiar with the slope N, but voids are generated in the bag-shaped body 3a and integrated with the bag-shaped body 3a when the cured material is cured. A solid cured product cannot be obtained due to reasons such as not being able to be obtained, resulting in insufficient strength (see Table 1 below).

For example, when a material having a cement: sand ratio of 1: 2 (weight ratio) is used as the dry mortar 3b, if the filling amount is set to about 128%, the strength can follow the slope N. In terms of surface, a very excellent mortar bag 3 can be obtained.

Further, as shown in FIG. 2, the bag-shaped body 3a constituting the mortar bag 3 has a double structure including an inner bag body 6 and an outer bag body 7, and between these two bag bodies 6 and 7. Sheet-shaped high-strength fibers 8 for increasing the strength of the bag-shaped body 3a in the longitudinal direction are arranged. Here, the high-strength fiber 8 is used in at least the longitudinal direction of the bag-shaped body 3a, and the high-strength fiber 8 increases the strength of the bag-shaped body 3a in the longitudinal direction. The high-strength fiber 8 may be joined (for example, heat-sealed or bonded) or connected (for example, sutured) to or both of the bags 6 and 7, or between the two 6 and 7. It may just be inserted. On the other hand, the inner bag body 6 may be simply inserted into the outer bag body 7, or may be directly or indirectly connected to the outer bag body 7 via, for example, high-strength fibers 8. When the inner bag body 6 is only inserted into the outer bag body 7, for example, after accommodating the dry mortar 3b in the inner bag body 6, the outer bag body 7 is covered on the outside of the inner bag body 6. You can do it.

Here, the bags 6 and 7 can be formed by using a sheet-like body that does not pass through the dry mortar 3b and has water permeability or moisture permeability, and the material thereof is, for example, a non-woven fabric, felt, or cloth. (Woven fabric), knitted fabric, jute cloth, water-decomposable plastic, thin cotton and the like.

Further, as the material of the high-strength fiber 8, synthetic fibers such as polyethylene, polyester, nylon and vinylon manufactured to be highly strong for industrial materials, high-strength glass fiber, carbon fiber, aramid fiber and the like are used. Will be done.

The base material bag 4 contains the base material 4b in a bag-shaped body 4a having an elongated tubular shape with both ends closed. The bag-shaped body 4a can be formed by using a sheet-shaped body having water permeability or moisture permeability without passing through the base material 4b, and the same material as the bag bodies 6 and 7 can be used as the material. .. The base material 4b may be a vegetation base material appropriately selected from, for example, seeds of plants for greening (vegetation seeds), growth auxiliary materials (water retention materials, fertilizers, etc.), soil conditioners, and the like. It may be another normal base material, and may be a mixture of a vegetation base material and a normal base material. The vegetation base material includes, for example, one containing vermiculite as a main component and containing vegetation seeds, a surface soil seed bank, and specifically, a ground near a slope protection target area (greening target area). Examples include those prepared by appropriately mixing growth auxiliary materials such as peat moss, vermiculite compost, and water retention material with the surface soil containing vegetation seeds such as forests. In this case, the plant can be surely introduced in a streak pattern. The normal base material includes wood chips, agricultural and marine waste (shells, crab shells, fruit scraps, etc.), paper sludge, and other materials appropriately selected from materials that do not harm vegetation. The material is mentioned.

Then, as shown in FIG. 3B, the slope protection method of this embodiment is completed only by laying the slope protection tool 1 on the slope N. In order to lay the slope protection tool 1, for example, the slope protection tool 1 may be fixed to the slope N by driving a fixing member 9 such as an anchor pin. In addition, by laying the slope protection tool 1 on the slope N so that the bags 3 and 4 follow the contour lines, the plants will take root in the soil deposited on the mountain side of the bags 3 and 4, and the greening will be further improved. It is desirable in terms of obtaining the small step effect that can be achieved quickly and satisfactorily, and further desirable in terms of improving the landscape. In addition to the arrangement on the contour lines, the mortar bag 3 may be arranged so as to be orthogonal to the contour lines, and the fixing member 9 may be placed at the intersection and connected in a grid pattern (not shown). By doing so, it is possible to obtain a construction method having a higher protective effect on the slope N.

Each of the bags 3 and 4 of the slope protection tool 1 laid on the slope N as described above is arranged along the slope N without a gap due to its own weight. That is, each of the bags 3 and 4 has a flexibility of more than a degree that can be stretched along the slope N even if the slope N has irregularities. This also applies to the net-like member 2.

Then, as shown in FIG. 3B, the dry mortar 3b is cured with the supply of water into the mortar bag 3 due to rainfall or the like. After the dry mortar 3b is cured in this way, the mortar bag 3 maintains its shape, thereby maintaining the close contact state of the mortar bag 3 with the slope N, as shown in FIG. 3 (C). In addition, the vegetation base 10 is surely formed by the accumulation of runoff sediment on the mountain side of the mortar bag 3, and the above-mentioned small step effect can be obtained. Then, in this example, as described above, since the filling amount of the contained material in the bag-shaped body 3a is taken into consideration, such a small step effect can be obtained satisfactorily and surely.

In particular, when the fixing member 9 is placed, the mortar bag 3 is pierced by the plurality of fixing members 9, so that the mortar bag 3 is fixed after the dry mortar 3b is cured. Since it is firmly connected to the head of 9 to form an integrated structure, the effect of reinforcing the net-like member 2 in both the vertical and horizontal directions can be obtained. In this case, the protective effect from deer trolls is also enhanced. Here, the net-shaped member 2 of this example is obtained by Russell knitting (chain knitting), and the strength in the horizontal direction is inferior to the strength in the vertical direction, and therefore, it tends to shift (elongate) in the horizontal direction. However, this lateral strength is greatly reinforced by the mortar bag 3 after the dry mortar 3b is cured, and by firmly pressing the slope N with the mortar bag 3, the net-like member 2 expands and contracts. The sex is limited, and the protective function of the slope N surface layer is also improved. That is, only by deploying the slope protection tool 1 and fixing it with the fixing member 9, it is possible to effectively suppress the initial movement of the boulder falling on the slope N, and it is possible to prevent small collapse caused by it. Therefore, the slope protection tool 1 is suitable for use on the slope N where small rockfalls are likely to collapse and the slope N where erosion is likely to occur, and also contributes to the suppression of frost heaving of the slope N, and the slope of the present embodiment. The protection method will be applicable as a greening (slope protection) foundation work.

By implementing the slope protection method in which the slope protection tool 1 is laid on the slope N as described above, the vegetation seeds in the base material 4b housed in the base material bag 4 germinate and grow, which is more positive. You can do greening. Further, even when the slope protection tool 1 does not contain plant seeds, the vegetation base 10 formed in small steps on the mountain side of the mortar bag 3 can effectively capture the flying seeds from the surrounding vegetation. The plant germinates and grows. Therefore, the greening coating on the slope N is ensured over almost the entire surface.

Moreover, the compressive strength of the mortar formed by the dry mortar 3b of the mortar bag 3 is high, but the bending strength is low, and therefore there is a problem that the mortar after curing is easily broken. 8 makes the mortar hard to crack. Further, the bag-shaped body 3a of the mortar bag 3 is thick and water does not sufficiently penetrate into the inside of the bag-shaped body 3a, or the amount of water supplied to the mortar bag 3 is small, so that the dry mortar 3b is sufficient. Even if it is not cured, the bag-shaped body 3a can be reshaped by the high-strength fiber 8.

Further, in the slope protection tool 1 of this example, the high-strength fiber 8 is sandwiched between the inner bag body 6 and the outer bag body 7 in the bag-shaped body 3a of the mortar bag 3, so that the dry mortar is placed in the mortar bag 3. In addition to being able to prevent the high-strength fibers 8 from peeling off when accommodating 3b, the formation of spaces in the three-layer structure of the bag-shaped body 3a improves the water retention performance and cures the mortar. It can also be expected that the effect will be enhanced (higher strength).

By the way, if the dry mortar 3b absorbs moisture and moisture and is hardened before the slope protection tool 1 is laid on the slope N, the bag-shaped body 3a will be formed on the slope N after being laid on the slope N. There is a possibility that a sufficient small step effect cannot be obtained because it does not adhere to the unevenness of. Therefore, in the slope protection tool 1 of this example, as shown in FIGS. 1 (A) and 3 (A), a hygroscopic bag (drying bag) 13 containing a desiccant and having water permeability or moisture permeability is netted. It is attached to the shape 2. Specifically, the net-shaped body 2 is provided with an accommodating portion 5a having the same structure as the accommodating portion 5, and the hygroscopic bag 13 is accommodated in the accommodating portion 5a.

As the desiccant contained in the hygroscopic bag 13, clay minerals such as quicklime, silica gel, and bentonite, and calcium chloride can be considered. Since each of these desiccants has its own characteristics, it is usually used alone, but it may be used in combination.

Then, at least one or more hygroscopic bags 13 may be attached to one slope protection tool 1 (net-like body 2). Further, in the illustrated example, the moisture absorbing bag 13 is attached to the end portion of the slope protection tool 1 (net-like body 2), but the attachment position is not limited to this, and the attachment position is not limited to this, and the center of the slope protection tool 1 (net-like body 2) is attached. It may be a department or the like.

Similar to the mortar bag 3 and the vegetation bag 4, the hygroscopic bag 13 has an elongated tubular shape with both ends closed, and its length is about the same as the width of the net-like body 2 (the length of the accommodating portion 5a). However, if the hygroscopic bag 13 is formed into a single elongated bag in this way, the bias of the desiccant contained therein becomes a problem. Therefore, in this example, in order to prevent / reduce the bias of the desiccant, the desiccant is stored in each of a plurality of (for example, about 10 bags) pouches connected in a band shape. The amount of desiccant Taking quicklime example, 10~120g / ^{m 2,} and preferably, to 20 to 40 g / ^{m 2,} in this case, the sachet quicklime by 15 g (bag length 8~10cm ) May be stored separately.

The slope protection tool 1 of this example is usually stored and distributed in a rolled state as shown in FIG. 1 (B) until it is laid on the slope N, and the moisture absorbing bag 13 is stored. By attaching the dry mortar 3b, the hardening of the dry mortar 3b until the slope protection tool 1 is laid on the slope N can be suppressed to some extent. However, in order to further prevent the dry mortar 3b from hardening, it is preferable to prevent the slope protective tool 1 before laying on the slope N from coming into contact with the outside air containing moisture and moisture, for example, moisture proofing. It is conceivable to pack the film with a highly effective moisture-proof film such as an aluminum-deposited film or a silica-deposited film, and the moisture-proof film (thickness 120 μm) in which nylon or the like is laminated is relatively inexpensive and has excellent usability.

Further, as shown in FIG. 1 (B), the slope protective tool 1 is placed in the sealed bag 14 formed of these moisture-proof films, and the mouth of the sealed bag 14 is sealed with a heat seal or the like with the air removed as much as possible. Is sealed, the bag-shaped body 3a (mortar 3) containing the dry mortar 3b and the moisture absorbing bag 13 are in a vacuum-packed state.

When the desiccant is not used as described above, the dry mortar 3b may be cured within one month, but when the moisture absorbing bag 13 is used and the vacuum packing is performed as described above, it is half a year. As described above, the dry mortar 3b can be maintained in a non-cured state.

Further, in general, the desiccant is discarded after fulfilling its role, but in this example, the hygroscopic bag 13 containing the desiccant is laid on the slope N with the desiccant attached to the net-like body 2. When quicklime is used as a desiccant, it has the effect of adjusting the pH of the soil and the effect of supplying calcium, which is a nutritional component. Silica gel supplies silicon and is expected to have an effect of suppressing lodging in gramineous plants. In addition, clay minerals such as bentonite have fertilizer-retaining power in addition to water-retaining power, so they can be expected to have the effect of retaining fertilizer that is washed away. And, not discarding the hygroscopic bag 13 containing the desiccant also leads to the advantage that dust is not generated at the construction site.

Moreover, when packing the slope protection tool 1, when vacuum-packing, the volume of the slope protection tool 1 itself is reduced by removing the air, so that the transportation cost can be reduced and the storage space can be made compact. Due to the hardening caused by the vacuum packing, it is difficult for the load to collapse during transportation, and the effect of making it easy to carry can be obtained.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be variously modified and implemented without departing from the gist of the present invention. For example, the following modification examples can be given.

When carrying out the slope protection method, the slope protection tool 1 integrated in advance may be laid on the slope N, but for example, the slope protection tool 1 in a state where the bags 3, 4 and 13 are not attached. May be inserted into the accommodating portions 5, 5a after arranging the bags 3, 4, 13 on the slope N. In this case, the slope protection tool 1 is lightened and can be transported to the slope N. It can be done by a small number of people.

Further, the bags 3, 4, and 13 are not limited to those having an elongated bag shape as shown in FIG. 1 (A), and may be, for example, a bag shape having substantially the same aspect ratio. In this case, the configuration of the accommodating portions 5, 5a of the net-shaped member 2 that holds the bags 3, 4, 13 may be appropriately changed according to the bags 3, 4, 13.

It is formed on the underside of the net-like member 2 using a biodegradable material such as rayon, pulp fiber, synthetic resin, a soluble material or a water-degradable material, and is configured to pass water and plant buds and roots. The sheet-shaped member (not shown) may be provided by an appropriate means such as sticking. In this case, a vegetation base material containing a material appropriately selected from vegetation seeds, fertilizers, soil conditioners, water-retaining materials, etc. is attached to the lower surface of the sheet-shaped member with a water-soluble glue material, whereby the sheet-shaped member is adhered. It is desirable to configure the plant so that the vegetation base material is supported. The sheet-shaped member can also be formed by thinly stretching a thin cotton made of rayon.

The sheet-like member and the net-like member 2 may be directly fixed by sticking or the like. For example, after the sheet-like member and the net-like member 2 are arranged on the slope N in a laminated state, an anchor is used. By placing a fixing member 9 such as a pin, both may be laid on the slope N.

In addition, the member to which each bag 3, 4, 13 is mounted is not limited to the net-shaped member 2, and may be a mat-shaped or sheet-shaped member. Further, by using the net-shaped member 2 or the like, the installation of each bag 3, 4, 13 can be simplified, but the installation is not limited to this, and only the bags 3, 4, 13 are installed. May be good.

In the examples shown in FIGS. 1 (A) and 3 (A), the accommodating portion 5a for accommodating the hygroscopic bag 13 is provided separately from the accommodating portion 5, but the present invention is not limited to this, and the accommodating portion 5a is provided. Instead, the hygroscopic bag 13 may be accommodated in the accommodating portion 5. Further, although the net-shaped member 2 shown in FIG. 1A is provided with the accommodating portions 5, 5a, the accommodating portions 5, 5a are not provided, and for example, each bag 3, 4, 13 is netted with a rope, a wire, or the like. It may be tied to the shaped member 2.

The slope protection method performed by laying the slope protection tool 1 is suitable for implementation on a slope, and slope N is an example of a slope. For example, the slope protection method is carried out on a flat ground or the like. Needless to say, it's good. However, the slope protection method is more suitable for implementation on the slope N in that the small step effect can be obtained.

In the example shown in FIG. 1 (A), the mortar bag 3 is housed in one of the three storage sections 5, and the base material bag 4 is housed in the remaining storage section 5, but the present invention is not limited to two. The mortar bag 3 is stored in one storage unit 5, and the base material bag 4 is stored in the remaining storage unit 5, or the mortar bag 3 is stored in all the storage units 5 without using the base material bag 4. The ratio of accommodating the mortar bag 3 and the base material bag 4 can be appropriately changed.

In the above embodiment, the mortar bag 3 in which the dry mortar 3b is housed in the bag-shaped body 3a is used, but the present invention is not limited to this, and for example, cement-based materials such as dry cement containing no aggregate and other hardening such as gypsum are used. A bag (hardened bag) in which the material is housed in the bag-shaped body 3a may be used instead of the mortar bag 3.

The bag-shaped body 3a shown in FIG. 2 has a three-layer structure, but the present invention is not limited to this, and for example, the inner bag-shaped body 6 is eliminated so that the high-strength fibers 8 are exposed inside the bag-shaped body 3a. Alternatively, the outer bag body 7 may be eliminated so that the high-strength fibers 8 are exposed on the outside of the bag-shaped body 3a.

In the mortar bag 3, a core material such as an iron wire or a high-strength fiber rope may be arranged in the longitudinal direction while maintaining the center by a spacer such as a lantern spacer (not shown). By doing so, the mortar bag 3 having higher strength can be obtained, and the bag shape can be obtained after the slope protection tool 1 is laid on the slope N, until the dry mortar 3b of the mortar bag 3 is cured, and after the curing. The body 3a may be able to maintain a good state along the slope N.

The bag-shaped body 3a of the mortar bag 3 shown in FIG. 2 is provided with high-strength fibers 8 in a tubular shape or a bag shape covering the entire outer surface of the inner bag body 6 and the inner surface of the outer bag body 7. Not limited to this, the high-strength fiber 8 may be configured to increase the strength of the bag-shaped body 3a in the longitudinal direction. Therefore, for example, as shown in FIG. 4 (A), the high-strength fibers 8 are fixed in a striped pattern to the sheet-shaped outer bag body 7, and as shown in FIG. 4 (B), the high-strength fibers 8 are inside. The outer bag body 7 may be rolled into a tubular shape so as to be, and the edge thereof may be closed to form the bag-shaped body 3a. The inner bag body 6 may be provided in this forming process, or the inner bag body 6 may be provided with the high-strength fibers 8 instead of the outer bag body 7, and the inner bag body may be provided so that the high-strength fibers 8 are on the outside. 6 may be rolled into a tubular shape. In any case, in the bag-shaped body 3a after formation, the high-strength fiber 8 has a portion extending in the longitudinal direction of the bag-shaped body 3a, so that the strength of the bag-shaped body 3a in the longitudinal direction is increased.

Further, in the modified examples shown in FIGS. 4A and 4B, the high-strength fiber 8 has only a portion extending in the longitudinal direction of the bag-shaped body 3a, but a portion extending in the circumferential direction of the bag-shaped body 3a. As an example thereof, the high-strength fibers 8 may be arranged in a grid pattern, as shown in FIGS. 5A and 5B, for example.

Further, the high-strength fibers 8 can be variously provided within a range in which the strength in the longitudinal direction of the bag-shaped body 3a can be increased. For example, as shown in FIG. 6A, the rectangular inner bag-shaped body 6 can be provided. Alternatively, the outer bag body 7 may be provided so as to pass diagonally, or the inner bag body 6 or the outer bag body 7 may be provided so as to extend spirally when the inner bag body 6 or the outer bag body 7 is rolled into a tubular shape (FIG. 6 (B). ) May be done.

If the mortar flows out from the mortar bag 3 due to the supply of water to the mortar bag 3 due to rainfall or the like, the mortar is alkaline and may have an adverse effect depending on the vegetation. Therefore, considering that the mortar flows out from the mortar bag 3 mainly to the valley side of the mortar bag 3, as shown in FIGS. 7, 8 (A) and 8 (B), the inside of the mortar bag 3 is located on the valley side. By arranging the Japanese bag 11, it is possible to suppress the adverse effect on the vegetation due to the outflow of mortar. In order to surely obtain such an effect, when the slope protection tool 1 is laid on the slope N, it is preferable to arrange the slope protection tool 1 so that the neutralization bag 11 is located on the valley side of the mortar bag 3. ..

The neutralizing bag 11 contains an alkaline neutralizing agent 11b in a bag-shaped body 11a having an elongated tubular shape with both ends closed. The bag-shaped body 11a can be formed by using a sheet-shaped body having water permeability or moisture permeability without passing through the alkali neutralizing agent 11b, and the same material as the bags 6 and 7 should be used as the material. Can be done. The alkali neutralizing agent 11b is a material obtained by contacting a carbon material treated with, for example, peat moss (acidic) or an acid (for example, a charcoal of a plant carbide after contacting with a solution containing calcium chloride) with hydrochloric acid. ) Can be used.

In the examples shown in FIGS. 7, 8 (A) and 8 (B), the mortar bag 3 and the neutralization bag 11 are housed in a pair in the storage section 5, and the neutralization bag 11 for measures against mortar outflow is stored in the mortar bag. Although the example of arranging only on the valley side of 3 is shown, the present invention is not limited to this, and the neutralizing bag 11 may be arranged on the mountain side of the mortar bag 3 as well, and in a form other than the neutralizing bag 11. , The alkali neutralizer 11b may be arranged around the mortar bag 3.

As shown in FIG. 9 (A), a fertilizer bag is placed on the mountain side of the mortar bag 3 in order to promote germination and growth of plants in the vegetation base 10 (see FIG. 3 (C)) formed on the mountain side of the mortar bag 3. 12 may be arranged. In the illustrated example, the mortar bag 3 and the fertilizer bag 12 are housed in a pair in one storage part 5. Further, in this case, the base material bag 4 can be used instead of the fertilizer bag 12. As the fertilizer bag 12, for example, the contents of the base material bag 4 may be specialized for fertilizer.

Further, the mortar bag 3, the neutralization bag 11, and the base material bag 4 (or the fertilizer bag 12) may be accommodated in one accommodating portion 5. In this case, it is preferable to arrange the neutralization bag 11 on the valley side of the mortar bag 3 and the base material bag 4 (or fertilizer bag 12) on the mountain side.

Further, in the examples shown in FIGS. 7, 8 (A) and 8 (B), the mortar bag 3 and the neutralization bag 11 are accommodated in one accommodating portion 5, but the present invention is not limited to this, and for example, FIG. 9 (B). ), A plurality of accommodating portions 5 that are continuously arranged in the net-like member 2 may be provided, and the mortar bag 3 and the neutralization bag 11 may be individually accommodated in each accommodating portion 5. This also applies when the fertilizer bag 12 is used in place of or in addition to the neutralization bag 11.

In the examples shown in FIGS. 8A and 8B, when the slope protection tool 1 is laid on the slope N, the mortar bag 3 and the neutralization bag 11 housed in pairs in one storage unit 5 are individually stored. Although it is pierced by the fixing member 9, only the mortar bag 3 on the mountain side of the mortar bag 3 and the neutralization bag 11 may be pierced and fixed by the fixing member 9. As shown in FIGS. 3B and 3C, the mortar bag 3 independently housed in the storage section 5 is individually pierced by the fixing member 9 and fixed to the slope N, and is fixed to the slope N. 4 is also fixed in the same manner.

Needless to say, the above-mentioned modifications may be combined as appropriate.

Further, in each of the above examples, the high-strength fibers 8 are used to increase the strength of the bag-shaped body 3a in the longitudinal direction, but such high-strength fibers 8 may not be used.

1 Slope protection tool 2 Net-shaped member 3 Mortal bag 3a Bag-shaped body 3b Dry mortar 4 Base bag 4a Bag-shaped 4b Base material 5 Storage part 5a Storage part 6 Inner bag body 7 Outer bag body 8 High-strength fiber 9 Fixing member 10 Veget base 11 Neutralization bag 11a Bag-shaped body 11b Alkaline neutralizer 12 Fertilizer bag 13 Moisture absorption bag N Slope

Claims (3)

A cured bag containing a curing material in a water-permeable or moisture-permeable bag-shaped body, and a vegetation base material containing a plant seed for greening or a growth aid or a soil conditioner in the water-permeable or moisture-permeable bag-shaped body. To prevent the cured material from absorbing moisture and moisture and hardening before laying on a slope, a base bag containing the cured material and a substantially rectangular net-like member. A slope protection device equipped with a desiccant,
The cured bag and the base material bag arranged at appropriate intervals in the longitudinal direction of the net-shaped member are held by the net-shaped member.
By the drying agent is its entirety accommodated in a sealed bag in a state held by the net-like member before laying the slope, be stretched by along the bag-like body the uneven slope A slope protection device that is more flexible than it can be. The first aspect of the present invention, wherein the desiccant is held in the net-like member in a state of being contained in a hygroscopic bag having water permeability or moisture permeability and containing only the desiccant, and is contained in the sealed bag. Slope protection equipment. A slope protection method for laying the slope protection tool according to claim 1 or 2 on a slope.

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