JP2022136251A - Greening foundation construction tool and greening foundation construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a greening foundation construction tool and a greening foundation construction method which can keep an adequate state where a bag-like body or the like is provided along a slope face.

SOLUTION: A greening foundation construction tool 1 includes a bag-like body 4a which stores a base material 4b, has both of blocked ends and has a slim cylindrical shape, a fixing member 9, a net-like member 2 having an approximately rectangular shape, and an iron wire arranged in the longitudinal direction of the bag-like body 4a, wherein the bag-like body 4a and the iron wire are held by the net-like member 2, the net-like member 2 and the bag-like body 4a are fixed to a slope face N by the fixing member 9 so that the longitudinal direction of the bag-like body 4a is arranged on a contour line of the slope face N of a greening objective place, and the state being along the slope face N is kept by the iron wire.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to, for example, a greening foundation tool and a construction method for the greening foundation work.

A slope on which a slope protection tool composed of a bag-shaped body containing a base material together with vegetation seeds (seeds of greening plants) and a net-shaped member to which a plurality of the bag-shaped bodies are attached is installed on the slope (slope). Protective work is known (Patent Document 1).

In this slope protection work, a vegetation base is formed in a small step on the mountain side of the bag-like body by the deposited sediment that is dammed and deposited by the bag-like object, the leaves of trees from the surroundings, and the like, and the plants grow easily on this step. The so-called small-step effect enables early and favorable greening. In other words, the term "bench effect" as used herein refers to the effect of accumulating earth and sand to form a growth base layer having a gentler slope than the slope in the shape of a small step, thereby facilitating the growth of plants on the small step.

However, the base material in the bag used in this slope protection work is mainly composed of organic matter and vermiculite, and over time the organic matter is consumed and the vermiculite shrinks. Loss of weight may occur. In this case, along with this weight loss, the vegetation base that constitutes the bench is washed away from the gap between the slope and the bag-shaped body of the slope protection equipment installed on the slope and from the upper side of the bag-shaped body.・There is a problem that the vegetation base is not formed on the mountain side of the bag-shaped body, and as a result, the small step effect cannot be obtained.

Therefore, it is conceivable to include a hardening material that hardens by absorbing water in the base material or the bag-like body. If the hardening material is hardened by rainfall or the like, the shape of the bag-like body is maintained, so that the loss of the small step effect can be prevented.

JP-A-2007-56606

However, with the above-described conventional slope protection tool, there is a possibility that the bag-shaped body or the like cannot maintain a good state along the slope.

The present invention has been made in consideration of the above-mentioned matters, and its object is to provide a greening foundation tool and a greening foundation work construction method that can maintain a state in which a bag-shaped body or the like conforms to a slope. to do.

In order to achieve the above object, a basic greening tool according to the present invention comprises a slender cylindrical bag-shaped body containing a base material and closed at both ends, a fixing member, and a substantially rectangular net-shaped member. and iron wires arranged along the longitudinal direction of the bag-shaped body, wherein the bag-shaped body and the iron wires are held by the net-shaped member, and the net-shaped member and the The bag-shaped body is fixed to the slope by the fixing member so that the longitudinal direction of the bag-shaped body is arranged on the contour line of the slope of the land to be planted, and is along the slope by the iron wire. is maintained (claim 1).

On the other hand, in order to achieve the above object, a method for constructing foundation work for greening according to the present invention lays the foundation work tool for greening according to claim 1 on the slope.

In the present invention, it is possible to obtain a greening foundation tool and a method for constructing a greening foundation work that can maintain a state in which a bag-shaped body or the like satisfactorily follows a slope.

(A) is a perspective view schematically showing the configuration of the slope protection tool according to the reference embodiment in an unfolded state, and (B) is an explanatory view showing a method of accommodating the slope protection tool. It is explanatory drawing which shows roughly the structure of the bag-shaped body of the mortar bag of the said slope protection tool. (A) is a vertical cross-sectional view schematically showing the installation state of the slope protection device, and (B) and (C) are illustrations schematically showing changes in the state of the slope protection device laid on the slope. It is a diagram. (A) and (B) are explanatory views schematically showing the configuration before and after forming the modification of the bag-shaped body. (A) and (B) are explanatory views schematically showing the configuration before and after formation of another modification of the bag-shaped body. (A) and (B) are respectively explanatory views schematically showing the configuration of still another modification of the bag-shaped body. It is explanatory drawing which shows roughly the structure of another modification of the said slope protection tool. (A) and (B) are explanatory diagrams schematically showing changes in the state of the slope protection tool of FIG. 7 laid on a slope. (A) and (B) are explanatory diagrams each schematically showing a configuration of a modified example of the slope protection tool.

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

In the slope protection method according to the reference form, the slope protection tool 1 shown in FIG. It is for the purpose of planning.

As shown in FIG. 1A, the slope protection tool 1 includes a substantially rectangular net-like member 2, and a mortar bag 3 and a base material bag 4 held (attached) to the net-like member 2. .

The net-like member 2 has accommodation portions 5 at appropriate intervals in the longitudinal direction. Here, the net-like member 2 of this example is, for example, a member having a width of 1 m and a length of 5 to 10 m, and the accommodating portions 5 are provided at intervals of 30 cm in the vertical direction. That is, only a part of the net-like member 2 (the slope protector 1) is shown in FIG. 1(A). Each storage portion 5 stores the mortar bag 3 or the base material bag 4 alone. In the example shown in FIGS. 1(A) and 3(A), the mortar bag 3 is accommodated in one of three accommodating portions 5, and the base material bag 4 is accommodated in the remaining accommodating portions 5. As shown in FIG. In addition, the accommodating portion 5 is formed in a bag shape, a tubular shape, or a pocket shape having a size capable of accommodating the mortar bag 3 or the base material bag 4. Each bag 3 , 4 is thereby held by the net-like member 2 .

In addition, the net-like member 2 is made of highly durable fibers (for example, fibers such as nylon, polyester, aramid, carbon, glass, polyacetal, etc.) or corrosive fibers (for example, fibers such as coconut fiber), and has a mesh size of 5 to 10 mm. Both of these (durable fiber and corrosive fiber) may be overlaid. Furthermore, in order to improve the strength, a wire mesh (for example, a tortoiseshell wire mesh or a lath wire mesh) may be superimposed on the net-like member 2 .

As shown in FIG. 1(A), the mortar bag 3 has a water-permeable or moisture-permeable bag-like body 3a having an elongated cylindrical shape with both ends closed, and a dry mortar (an example of a hardening material) that hardens by absorbing water. 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 loses weight over time due to elution of fertilizer components, etc.), so high strength is achieved. be able to. Although the dry mortar 3b of this example is obtained by mixing cement with granular sand as an aggregate, 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 material to be contained in the bag-like body 3a is a hardening material that hardens by absorbing water or moisture, or a hardening bag with high strength can be obtained by containing the hardening material mixed with only aggregate. Further, a reinforcing material such as steel fiber may be mixed in the dry mortar so as to obtain the effect of improving the strength of the mortar bag 3 after hardening.

Here, the filling amount of the contents in the bag-like body 3a is set to 80 to 160% by weight when the rough filling is taken as 100%. Rough filling is to fill the bag-like body 3a by allowing the contents to drop naturally, and is a method generally used when measuring the "loose bulk density". When the content of the bag-shaped body 3a exceeds 160%, the strength is improved, but the flexibility of the mortar bag 3 is lost, making it difficult to follow the slope N, and the material cost increases. necessary. Conversely, if the filling amount is less than 80%, the mortar bag 3 fits well on the slope N, but voids occur in the bag-like body 3a, and the mortar bag 3a is integrated with the bag-like body 3a when the hardening material hardens. For some reason, such as the fact that it is not used, a solid hardened product cannot be obtained, resulting in insufficient strength (see Table 1 below).

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

Moreover, as shown in FIG. 2, the bag-like body 3a constituting the mortar bag 3 has a double structure consisting of an inner bag 6 and an outer bag 7. Between these two bags 6 and 7, Sheet-like high-strength fibers 8 are arranged to increase the strength in the longitudinal direction of the bag-like body 3a. Here, the high-strength fibers 8 are used at least in the longitudinal direction of the bag-like body 3a, and the high-strength fibers 8 increase the strength of the bag-like body 3a in the longitudinal direction. The high-strength fibers 8 may be joined (for example, heat-sealed or glued) or connected (for example, sewn) to either one or both of the bag bodies 6 and 7, or It may be just inserted. On the other hand, the inner bag body 6 may be inserted into the outer bag body 7 or may be joined or connected to the outer bag body 7 directly or indirectly via the high-strength fibers 8 . In the case where the inner bag 6 is only inserted into the outer bag 7, for example, after the dry mortar 3b is placed in the inner bag 6, the outer bag 7 is put on the outer side of the inner bag 6. You can do it like this.

Here, the bags 6 and 7 can be formed using a sheet-like body that does not allow the dry mortar 3b to pass through and has water permeability or moisture permeability. (woven fabric), knitted fabric, jute fabric, water-degradable plastic, thin cotton, and the like.

In addition, as the material of the high-strength fiber 8, synthetic fibers such as polyethylene, polyester, nylon, vinylon, etc., which are manufactured to have high strength for industrial materials, high-strength glass fiber, carbon fiber, aramid fiber, etc. are used. be done.

The base material bag 4 contains a base material 4b in an elongated cylindrical bag 4a with both ends closed. The bag-like body 4a can be formed using a sheet-like body that does not pass through the base material 4b and has water permeability or moisture permeability. . The base material 4b may be a vegetation base material appropriately selected from, for example, seeds of greening plants (vegetation seeds), growth aids (water-retaining materials, fertilizers, etc.), soil conditioners, etc. Other normal substrates may be used, and a mixture of vegetation substrates and normal substrates may also be used. Examples of the vegetation base material include those containing vegetation seeds mainly composed of vermiculite, and topsoil seed banks. Examples include those obtained by appropriately mixing growth aids such as peat moss, bark compost, and water-retaining material with topsoil containing vegetation seeds such as forests. In this case, it is possible to reliably introduce the plant in a streak-like manner. In addition, the above-mentioned ordinary substrates include substrates appropriately selected from materials that do not harm vegetation, such as wood chips, agricultural and fishery wastes (shells, crab shells, fruit scraps, etc.), papermaking sludge, and the like. material.

The slope protection method of this embodiment is completed only by laying the slope protection tool 1 on the slope N as shown in FIG. 3(B). In order to install the slope protection tool 1, 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 so that the bags 3 and 4 follow the contour lines of the slope N, the plants take root in the soil deposited on the mountain sides of the bags 3 and 4, and the greening is further enhanced. This is desirable in terms of obtaining the small step effect that can be achieved quickly and satisfactorily, and is also desirable in terms of improving the scenery. In addition to being arranged on the contour lines, the mortar bags 3 may be arranged perpendicular to the contour lines, and fixed members 9 may be driven at the intersections to connect them in a lattice (not shown). By doing so, it is possible to achieve a construction method with a higher effect of protecting the slope N.

The bags 3 and 4 of the slope protection tool 1 laid on the slope N as described above are arranged along the slope N without gaps due to their own weight. That is, each of the bags 3 and 4 has a degree of flexibility that allows it to be stretched along even if the slope N has unevenness. This also applies to the net-like member 2 .

Then, as shown in FIG. 3(B), the dry mortar 3b hardens as water is supplied into the mortar bag 3 by rainfall or the like. After the dry mortar 3b has hardened in this manner, 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 reliably formed by depositing runoff earth and sand on the mountain side of the mortar bag 3, and the above-mentioned bench effect can be obtained. In this example, as described above, since the filling amount of the contents in the bag-like body 3a is taken into consideration, such a small step effect can be obtained satisfactorily and reliably.

In particular, when the fixing members 9 are placed, one mortar bag 3 is pierced by a plurality of fixing members 9, so that the mortar bag 3 is fixed to the fixing members after the dry mortar 3b hardens. Since it is firmly connected with the head portion of 9 to form an integral structure, a reinforcing effect in both the vertical and horizontal directions of the net-like member 2 can be obtained. In this case, the protection against deer trampling is also enhanced. Here, the net-like member 2 of this example is obtained by raschel knitting (chain knitting), and its strength in the horizontal direction is inferior to that in the vertical direction, so that it tends to shift (stretch) in the horizontal direction. However, the strength in the lateral direction is greatly reinforced by the mortar bag 3 after the dry mortar 3b has hardened. In addition, the protection function of the slope N surface layer is improved. That is, only by unfolding the slope protection tool 1 and fixing it with the fixing member 9, it is possible to effectively suppress the initial motion of falling boulders on the slope N, thereby preventing a small collapse resulting therefrom. Therefore, the slope protection tool 1 is suitable for use on the slope N that is prone to collapse of small rocks and the slope N that is prone to erosion, and also contributes to the suppression of frost heaving on the slope N. The protection method will be applicable as a greening (slope protection) foundation work.

By carrying out 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, making the slope more positive. Greening can be done. Moreover, even if the slope protection tool 1 does not contain plant seeds, the vegetation base 10 formed in a stepped shape on the mountain side of the mortar bag 3 can effectively catch flying seeds from the surrounding vegetation. Plants germinate and grow. Therefore, almost the entire surface of the slope N is covered with greenery without fail.

Moreover, although 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, there is a problem that the mortar after hardening is easily cracked. 8 makes the mortar difficult to crack. In addition, the bag-like body 3a of the mortar bag 3 is thick and the water does not sufficiently penetrate into the inside of the bag-like body 3a, or the amount of water supplied to the mortar bag 3 is small, so that the dry mortar 3b is not sufficiently supplied. The bag-like body 3a can retain its shape by the high-strength fibers 8 without curing.

In addition, in the slope protection tool 1 of this example, the high-strength fibers 8 are sandwiched between the inner bag 6 and the outer bag 7 in the bag-like body 3a of the mortar bag 3. It is possible to prevent the high-strength fiber 8 from peeling off when housing the bag 3b, and the formation of a space in the three-layer structure of the bag-like body 3a increases 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 hardens before laying the slope protection tool 1 on the slope N, the bag-like body 3a will not be able to reach the slope N after laying on the slope N. There is a possibility that sufficient Kodan effect cannot be obtained because it does not adhere to the unevenness of the surface. Therefore, in the slope protection tool 1 of this example, as shown in FIGS. It is attached to the body 2. Specifically, the net-like body 2 is provided with a storage portion 5a having the same structure as the storage portion 5, and the moisture absorption bag 13 is stored in the storage portion 5a.

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

At least one hygroscopic bag 13 may be attached to one slope protection tool 1 (net-like body 2). In the illustrated example, the hygroscopic 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 slope protection tool 1 (net-like body 2) is centered. It may be a department, etc.

As with the mortar bag 3 and the vegetation bag 4, the moisture-absorbing bag 13 has an elongated cylindrical shape with both ends closed, and its length is approximately 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 made in the shape of a single elongated bag in this way, the desiccant contained therein is unevenly distributed. Therefore, in this example, in order to prevent/reduce unevenness of the desiccant, a plurality of small bags (for example, about 10 bags) connected in a belt shape contain the desiccant in each. Taking quicklime as an example, the amount of desiccant used can be 10 to 120g/m ² , preferably 20 to 40g/m ² . ) should be stored separately.

Until the slope protection tool 1 of this example is laid on the slope N, it is usually stored and distributed in a rolled state as shown in FIG. Due to the attachment, hardening of the dry mortar 3b can be suppressed to some extent until the slope protection tool 1 is laid on the slope N. However, in order to prevent further hardening of the dry mortar 3b, it is preferable to prevent the slope protection tool 1 before being laid on the slope N from contacting the outside air containing water and humidity as much as possible. It is conceivable to pack with moisture-proof films such as highly effective aluminum vapor-deposited films and silica vapor-deposited films, and moisture-proof films (thickness 120 μm) laminated with nylon or the like are relatively inexpensive and excellent in usability.

In addition, as shown in FIG. 1B, the slope protection tool 1 is placed in a sealed bag 14 formed of these moisture-proof films, and the opening of the sealed bag 14 is closed by heat sealing or the like while removing as much air as possible. is sealed, the bag-like body 3a (mortar 3) containing the dry mortar 3b and the moisture absorbing bag 13 are vacuum-packed.

When the drying agent is not used as described above, the dry mortar 3b may harden within one month. As described above, it is possible to maintain a state in which the dry mortar 3b is not hardened.

In general, the desiccant is discarded after fulfilling its role, but in this example, the moisture absorption bag 13 containing the desiccant is laid on the slope N while 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 suppress lodging of gramineous plants. In addition, since clay minerals such as bentonite have water-retaining and fertilizer-retaining properties, they can be expected to have the effect of retaining the lost fertilizer. Not discarding the moisture absorption bag 13 containing the desiccant also leads to the advantage of not generating waste at the construction site.

Moreover, when the slope protection tool 1 is packed in a vacuum pack, 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. Also, due to the hardening associated with vacuum packing, it is difficult for the cargo to collapse during transportation, etc., and it is easy to carry.

It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the gist of the present invention. For example, the following modifications 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. are placed on the slope N, the bags 3, 4, 13 may be inserted into the storage portions 5, 5a. It can be done with a small number of people.

Moreover, each of the bags 3, 4, and 13 is not limited to the elongated bag-like shape shown in FIG. In this case, the structure of the accommodating portions 5, 5a of the net-like member 2 for holding the respective bags 3, 4, 13 may also be appropriately changed according to the respective bags 3, 4, 13. FIG.

The lower side of the net-like member 2 is formed using a biodegradable material such as staple fiber, pulp fiber, synthetic resin, a soluble material, or a water-decomposable material, and is configured to allow water and plant sprouts and roots to pass through. A sheet-like member (not shown) may be provided by appropriate means such as adhesion. In this case, a vegetation base material containing a material appropriately selected from vegetation seeds, fertilizers, soil conditioners, water-retaining materials, and the like is adhered to the lower surface of the sheet-like member by means of a water-soluble paste, thereby forming a sheet-like member. is desirably constructed so as to support the vegetation substrate. The sheet-shaped member can also be formed by thinly stretching rayon thin cotton.

The sheet-like member and the net-like member 2 may be directly fixed by adhesion or the like. Both may be laid on the slope N by driving a fixing member 9 such as a pin.

In addition, the member to which the bags 3, 4, and 13 are attached is not limited to the net-like member 2, and may be a mat-like or sheet-like member. Also, by using the net-like member 2 or the like, the installation of the bags 3, 4, 13 can be simplified. good too.

In the examples shown in FIGS. 1A and 3A, the storage portion 5a for storing the moisture-absorbing bag 13 is provided separately from the storage portion 5. However, the storage portion 5a is not limited to this. Instead, the moisture absorption bag 13 may be accommodated in the accommodation portion 5 . Further, although the net-like member 2 shown in FIG. 1A is provided with the accommodating portions 5 and 5a, the accommodating portions 5 and 5a are not provided, and the respective bags 3, 4 and 13 are connected to the net by ropes, wires or the like, for example. You may make it bind to the shaped member 2.

The slope protection method by laying the slope protection tool 1 is suitable for implementation on a slope, and the slope N is an example of a slope. It goes without saying that this is also a good thing. However, the slope protection method is more suitable for use on a slope N in that the small step effect can be obtained.

In the example shown in FIG. 1(A), the mortar bag 3 is accommodated in one of the three accommodating portions 5, and the base material bag 4 is accommodated in the remaining accommodating portions 5. The mortar bag 3 is stored in one storage part 5 and the base material bag 4 is stored in the remaining storage parts 5, or the mortar bag 3 is stored in all the storage parts 5 without using the base material bag 4. For example, the ratio of accommodating the mortar bag 3 and the base material bag 4 can be changed as appropriate.

In the above-described embodiment, the mortar bag 3 containing the dry mortar 3b is used in the bag-like body 3a. The mortar bag 3 may be replaced by a bag (curing bag) in which the material is contained in the bag-like body 3a.

The bag-like body 3a shown in FIG. 2 has a three-layer structure. Alternatively, the outer bag 7 may be eliminated so that the high-strength fibers 8 are exposed to the outside of the bag-like 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 with a spacer such as a lantern spacer (not shown). By doing so, the mortar bag 3 having a higher strength can be obtained. The body 3a may be able to maintain the state along the slope N satisfactorily.

In the bag-like body 3a of the mortar bag 3 shown in FIG. However, the high-strength fibers 8 may be configured to increase the strength in the longitudinal direction of the bag-shaped body 3a. Therefore, for example, as shown in FIG. 4A, high-strength fibers 8 are fixed in stripes to a sheet-like outer bag body 7, and as shown in FIG. The outer bag 7 may be rolled up to form a tubular shape, and the edges of the outer bag 7 may be closed to form the bag 3a. In this forming process, the inner bag body 6 may be provided, or the high-strength fibers 8 may be provided in the inner bag body 6 instead of the outer bag body 7, and the high-strength fibers 8 may be placed on the outside of the inner bag body. 6 may be rolled into a cylindrical shape. In any case, in the formed bag-shaped body 3a, since the high-strength fibers 8 have portions extending in the longitudinal direction of the bag-shaped body 3a, the strength in the longitudinal direction of the bag-shaped body 3a is increased.

In addition, in the modification shown in FIGS. 4A and 4B, the high-strength fibers 8 have only the portion extending in the longitudinal direction of the bag-like body 3a, but the portion extending in the circumferential direction of the bag-like body 3a. As an example, as shown in FIGS. 5A and 5B, the high-strength fibers 8 can be made into a lattice.

Moreover, the high-strength fibers 8 can be variously provided within a range that can increase the strength in the longitudinal direction of the bag-shaped body 3a. For example, as shown in FIG. Alternatively, it may be provided so as to pass through the diagonal line of the outer bag 7, or provided so that the high-strength fibers 8 extend spirally when the inner bag 6 or the outer bag 7 is rolled into a cylinder (Fig. 6 (B )).

When mortar flows out from the mortar bag 3 as water is supplied to the mortar bag 3 due to rainfall or the like, this mortar is alkaline and may adversely affect some vegetation. Therefore, considering that the mortar mainly flows out from the mortar bag 3 to the valley side of the mortar bag 3, as shown in FIGS. By arranging the Japanese bag 11, it is possible to suppress adverse effects on vegetation due to outflow of mortar. In order to reliably obtain such an effect, when laying the slope protection tool 1 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 alkali neutralizing agent 11b in an elongated tubular bag-like body 11a with both ends closed. The bag-like body 11a can be formed using a sheet-like body that is impervious to the alkali neutralizer 11b and has water permeability or moisture permeability. can be done. The alkali neutralizer 11b includes, for example, peat moss (acidic) or a carbon material treated with an acid (for example, a material obtained by contacting a carbonized plant body carbonized after contact with a solution containing calcium chloride and then contacting hydrochloric acid). ) can be used.

In the example shown in FIGS. 7, 8A and 8B, the mortar bag 3 and the neutralization bag 11 are accommodated in the accommodation portion 5 as a pair, and the neutralization bag 11 for preventing mortar outflow is included in the mortar bag. Although an example in which the neutralization bag 11 is arranged only on the valley side of the mortar bag 3 is shown, the neutralization bag 11 may be arranged on the mountain side of the mortar bag 3 as well. , the alkali neutralizer 11b may be arranged around the mortar bag 3.

In order to promote the germination and growth of plants on the vegetation base 10 (see FIG. 3C) formed on the mountain side of the mortar bag 3, a fertilizer bag is placed on the mountain side of the mortar bag 3 as shown in FIG. 9A. 12 may be placed. In the illustrated example, a pair of mortar bags 3 and fertilizer bags 12 are accommodated in one accommodation portion 5 . Also, 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 can be specialized for fertilizer.

Also, the mortar bag 3, the neutralization bag 11, and the base material bag 4 (or the fertilizer bag 12) may be accommodated in one accommodation 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 the fertilizer bag 12) on the mountain side.

Further, in the examples shown in FIGS. 7, 8A and 8B, the mortar bag 3 and the neutralization bag 11 are accommodated in one accommodation portion 5, but the present invention is not limited to this. ), the net member 2 may be provided with a plurality of storage portions 5 arranged continuously, and the mortar bags 3 and the neutralization bags 11 may be stored individually in each storage portion 5 . This is the same when the fertilizer bag 12 is used instead of or in addition to the neutralization bag 11 .

In the example shown in FIGS. 8(A) and (B), when laying the slope protection tool 1 on the slope N, the mortar bag 3 and the neutralization bag 11 which are housed as a pair in one housing portion 5 are individually separated. Although the fixing member 9 is made to penetrate, only the mortar bag 3 on the mountain side of the mortar bag 3 and the neutralization bag 11 may be penetrated and fixed by the fixing member 9 . Incidentally, as shown in FIGS. 3B and 3C, the mortar bags 3 individually accommodated in the accommodation portion 5 are individually penetrated by the fixing members 9 and fixed to the slope N, and the base material bags 4 is similarly fixed.

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

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

1 slope protection tool 2 net-like member 3 mortar bag 3a bag-like body 3b dry mortar 4 base material bag 4a bag-like body 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 Vegetation base 11 Neutralization bag 11a Bag-shaped body 11b Alkaline neutralizer 12 Fertilizer bag 13 Moisture absorption bag N Slope

Claims (2)

A bag-like body having a long and narrow cylindrical shape with both ends closed and containing a base material, a fixing member, a substantially rectangular net-like member, and iron wires arranged along the longitudinal direction of the bag-like body. It is a greening basic tool,
The bag-shaped body and the iron wire are held by the net-shaped member,
The net-shaped member and the bag-shaped body are fixed to the slope by the fixing member so that the longitudinal direction of the bag-shaped body is arranged on the contour line of the slope of the land to be planted, and are fixed by the iron wire. A greening basic tool characterized by maintaining a state along the slope. A construction method for a greening foundation work, comprising laying the greening foundation tool according to claim 1 on the slope.

Images