JP2017198050A - Slope protection tool and slope protection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slope protection tool capable of properly and reliably obtaining a berm effect, and a slope protection method.SOLUTION: A slope protection tool 1 of the present invention comprises a bag-like body 3a which accommodates a hardening material (e.g. dry mortar) 3b hardened by water absorption or moisture absorption and which has water permeability or moisture permeability, and a bag 13 for moisture absorption, which accommodates a desiccant (e.g. quicklime, silica gel or bentonite) and which has water permeability or moisture permeability. The slope protection tool can also comprise a sealed bag 14 for sealing the bag-like body 3a and the bag 13 for moisture absorption.SELECTED DRAWING: Figure 1

Description

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

  A slope on which a slope protection tool composed of a bag-like body containing a base material together with vegetation seeds (plant planting seeds) and a net-like member on which a plurality of the bag-like bodies are mounted is installed on a slope (slope) A protective work is known (Patent Document 1).

  In this slope protection work, the vegetation base is formed in small steps on the mountain side of the bag-like body due to the washed-out sediment deposited by wetting with the bag-like body, the leaves of the trees from the surroundings, etc., and the plants easily grow in this small step The so-called stage effect will realize greening early and well. In other words, the stage effect referred to here is an effect that a growth base layer having a gentler slope than the slope is formed in a step shape due to the accumulation of earth and sand, and plants easily grow in this 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. You may lose weight. In this case, the vegetation base that constitutes the steps is washed away from the gap between the slope and the bag-like body of the slope protection device installed on the slope, or from the upper side of the bag-like body. -There is a problem that the vegetation base is not formed on the mountain side of the bag-like body, and as a result, the step effect cannot be obtained.

  Therefore, it is conceivable that the base material or the bag-like body includes a curing material that is cured by water absorption. If the curable material is cured by rain or the like, the shape of the bag-like body is maintained, so that it is possible to prevent the loss of the stage effect.

JP 2007-56606 A

  However, in the above conventional slope protection device, the hardened material absorbs moisture and moisture inside and outside the bag-like body and hardens before laying on the slope, and the bag-like body becomes uneven on the slope after laying on the slope. There is a possibility that sufficient step effect is not obtained. Examples of the moisture / humidity source in the bag-like body include vegetation base materials such as fertilizers contained in the bag-like body, cotton, glue used for bonding, and the like.

  The present invention has been made in consideration of the above-described matters, and an object of the present invention is to provide a slope protection tool and a slope protection method capable of obtaining the step effect well and surely.

  In order to achieve the above object, a slope protection device according to the present invention contains a bag-like body that contains a curable material that is cured by water absorption or moisture absorption and has water permeability or moisture permeability, and a desiccant that contains water permeability or moisture permeability. (1).

  The slope protection tool may include a sealing bag for sealing the bag-like body and the hygroscopic bag (Claim 2).

  On the other hand, in order to achieve the above object, the slope protecting method according to the present invention lays the slope protecting tool according to claim 1 on the slope.

  A slope protection method according to the present invention is a slope protection method for laying the slope protection tool according to claim 2 on a slope, wherein the bag-like body and the hygroscopic bag taken out from the sealing bag are placed on the slope. It may be laid.

  In this invention, the slope protection tool and slope protection method which can acquire a step effect favorably and reliably are obtained.

  That is, in the slope protection device of the invention according to each claim of the present application, the desiccant prevents or reduces the curing material from absorbing moisture and moisture in the slope protection device before laying on the slope. As a result, when the slope protection device is laid on the slope, the bag-like body adheres to the irregularities of the slope and hardens in that state, so that the step effect based on this bag-like body can be obtained with good and certainty. Can do.

  In the slope protecting tool of the invention according to claim 2, it is possible to further prevent hardening of the cured material in the slope protecting tool before laying on the slope.

  In the slope protecting method according to the third and fourth aspects of the invention, the step protecting effect can be obtained with good and certainty by the slope protecting tool.

(A) is a perspective view which shows roughly the structure of the state which the slope protection tool which concerns on one embodiment of this invention developed, (B) is explanatory drawing which shows the accommodation method of the said slope protection tool. It is explanatory drawing which shows roughly the structure of the bag-like body of the mortar bag of the said slope protection tool. (A) is a longitudinal sectional view schematically showing an installation state of the slope protection tool, and (B) and (C) are explanations schematically showing changes in the state of the slope protection tool laid on a slope. FIG. (A) And (B) is explanatory drawing which shows roughly the structure before and after formation of the modification of the said bag-shaped body. (A) And (B) is explanatory drawing which shows roughly the structure before and after formation of the other modification of the said bag-shaped body. (A) And (B) is explanatory drawing which shows roughly the structure of the further another modification of the said bag-shaped body, respectively. It is explanatory drawing which shows roughly the structure of another modification of the said slope protection tool. (A) And (B) is explanatory drawing which shows roughly the change of the state of the slope protection tool of FIG. 7 laid in the slope. (A) And (B) is explanatory drawing which shows roughly the structure of the modification of the said 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 a slope N (see FIG. 3 (A)), which is an example of a slope, to protect the slope N. This is for greening.

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

  The net-like member 2 has accommodating portions 5 at appropriate intervals in the longitudinal direction. Here, the net-like member 2 of this example is a member having a horizontal width of 1 m and a vertical length of 5 to 10 m, for example, 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 protecting tool 1) appears. And in each accommodating part 5, the mortar bag 3 or the base material bag 4 is accommodated independently. In the example shown in FIG. 1A and FIG. 3A, 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 portion 5. The accommodating part 5 is formed in a bag shape, cylindrical shape or pocket shape having a size that can accommodate the mortar bag 3 or the base material bag 4, and each bag 3, 4 is one end of the accommodating part 5. The bag 3 is inserted into the inside from the side, whereby the bags 3 and 4 are held by the net-like member 2.

  The net-like member 2 is made of a highly durable fiber (for example, a fiber such as nylon, polyester, aramid, carbon, glass, polyacetal) or a corrosive fiber (for example, a fiber such as insulator), and has a mesh size of 5 to 10 mm. These may be formed to the extent that both of these (durable fibers and corrosive fibers) may be superposed. Furthermore, a wire mesh (for example, a turtle shell wire mesh or a lath wire mesh) may be superimposed on the net-like member 2 in order to improve the strength.

  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-like body 3a that has an elongated cylindrical shape with both ends closed and has water permeability or moisture permeability. 3b is contained, and a material that generates voids in the bag-like body 3a (for example, a material such as a base material that decreases over time due to elution of fertilizer components, etc.) is not accommodated. be able to. The dry mortar 3b of this example is obtained by mixing granular sand with cement as an aggregate. However, the aggregate constituting the dry mortar 3b is not limited to sand, and vermiculite, perlite (pumice), or the like is used. be able to. The items contained in the bag-like body 3a can be made of a hardened bag having high strength by containing only the hardened material that is hardened by water absorption or moisture absorption or by mixing the hardened material with only the aggregate. Further, for example, a reinforcing material such as steel fiber may be mixed with the dry mortar so as to obtain an effect of improving the strength of the mortar bag 3 after curing.

  Here, the filling amount of the contents into the bag-like body 3a is set to 80 to 160% by weight when the rough filling time is 100%. Coarse filling is a method of naturally dropping the contents in the bag-like body 3a and filling the bag-shaped body 3a, and is a method generally used when measuring the “loose bulk density”. And when the filling amount of the contents in the bag-like body 3a exceeds 160%, the strength is improved, but the flexibility of the mortar bag 3 is lost and it becomes difficult to follow the slope N, and the material cost is also extra. Necessary. On the other hand, when the filling amount is less than 80%, the familiarity of the mortar bag 3 with the slope N is improved, but voids are generated in the bag-shaped body 3a and are integrated with the bag-shaped body 3a when the curable material is cured. For example, a solid cured body cannot be obtained and the strength is insufficient (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 about 128%, the strength N can follow the slope N. The mortar bag 3 which is very excellent also in terms of surface is obtained.

  Further, as shown in FIG. 2, the bag-like body 3a constituting the mortar bag 3 has a double structure composed of the inner bag body 6 and the outer bag body 7, and between these two bag bodies 6, 7, Sheet-like high-strength fibers 8 for increasing the strength in the longitudinal direction of the bag-like body 3a are arranged. Here, the high-strength fibers 8 are used at least in the longitudinal direction of the bag-shaped body 3a, and the strength in the longitudinal direction of the bag-shaped body 3a is increased by the high-strength fibers 8. The high-strength fibers 8 may be joined (for example, heat fusion or adhesion) or connected (for example, stitched) to either one or both of the bags 6 and 7. It may just be inserted. On the other hand, the inner bag body 6 may be inserted only 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. When the inner bag body 6 is merely inserted into the outer bag body 7, for example, after the dry mortar 3 b is accommodated in the inner bag body 6, the outer bag body 7 is put on the outside of the inner bag body 6. What should I do?

  Here, the bag bodies 6 and 7 can be formed using a sheet-like body that does not pass through the dry mortar 3b and has water permeability or moisture permeability. Examples of the material include nonwoven fabric, felt, and cloth. (Woven fabric), knitted fabric, jute fabric, water-decomposable plastic, thin cotton and the like.

  The high-strength fiber 8 is made of synthetic fibers such as polyethylene, polyester, nylon, and vinylon, which are manufactured to be high strength for industrial materials, and high-strength glass fibers, carbon fibers, and aramid fibers. Is done.

  The base material bag 4 is obtained by housing the base material 4b in a bag-like body 4a having an elongated cylindrical shape whose both ends are closed. The bag-like body 4a can be formed using a sheet-like 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 thereof. . The base material 4b may be a vegetation base material including, for example, a seed selected from a plant for greening (vegetation seeds), a growth auxiliary material (water retention material, fertilizer, etc.) or a soil improvement material, etc. Other normal base materials may be used, and further, a vegetation base material and a normal base material may be mixed. Examples of the vegetation base material include those containing vegetation seeds mainly composed of vermiculite, and a topsoil seed bank. Specifically, a natural ground in the vicinity of a slope protection target area (greening target area) Examples include those obtained by appropriately mixing growth aids such as peat moss, bark compost and water retention material with topsoil containing vegetation seeds such as forests. In this case, the plant can be surely introduced in a streak shape. In addition, the normal base material includes a base material appropriately selected from materials that do not harm vegetation such as wood chips, agricultural and fishery waste (shells, rice husks, fruit wastes, etc.), paper sludge, etc. Materials.

  And 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. In order to lay the slope protecting tool 1, the slope protecting tool 1 may be fixed to the slope N by placing a fixing member 9 such as an anchor pin. In addition, laying the slope protection tool 1 on the slope N so that the bags 3 and 4 are along the contour line, the plant is rooted in the soil accumulated on the mountain side of the bags 3 and 4, and the greening is further improved. It is desirable in terms of obtaining the above-described step effect that can be achieved quickly and favorably, and is also desirable in terms of landscape improvement. In addition to the arrangement on the contour line, the mortar bag 3 may be arranged so as to be orthogonal to the contour line, and the fixing member 9 may be placed at the intersection to be connected in a lattice shape (not shown). By doing so, it can be set as the construction method with the higher protection effect of the slope N.

  The bags 3 and 4 of the slope protecting tool 1 laid on the slope N as described above are arranged in a state along the slope N without a gap by their own weight. In other words, each of the bags 3 and 4 has more flexibility than can be stretched along the slope N even if the slope N is uneven. The same applies to the net-like member 2.

  Then, as shown in FIG. 3B, the dry mortar 3b is cured with the supply of moisture into the mortar bag 3 due to rain or the like. After the dry mortar 3b is cured in this way, the mortar bag 3 maintains its shape, whereby the close contact state of the mortar bag 3 with the slope N is maintained, as shown in FIG. 3 (C). In addition, the vegetation base 10 is reliably formed, for example, by sedimentation of runaway earth and sand on the mountain side of the mortar bag 3, and the above-mentioned step effect is obtained. And in this example, since the filling amount of the stored thing with respect to the bag-shaped body 3a is considered as mentioned above, such a step effect can be acquired favorably and reliably.

  In particular, when the fixing member 9 is placed, the mortar bag 3 is fixed to the fixing member 9 after the dry mortar 3b is cured by keeping the single mortar bag 3 penetrated by the plurality of fixing members 9. Since it is firmly connected to the head 9 and has an integrated structure, the reinforcing effect in both the vertical and horizontal directions of the net-like member 2 can be obtained. In this case, the protection effect from deer trolling is also increased. Here, the net-like 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, the strength in the lateral direction is greatly reinforced by the mortar bag 3 after the dry mortar 3b is hardened. By firmly holding the slope N with the mortar bag 3, the expansion and contraction of the net-like member 2 is achieved. Therefore, the protective function of the slope N surface layer is also improved. That is, only by unfolding the slope protection tool 1 and fixing with the fixing member 9, the initial movement of the falling of the slope N on the slope N can be effectively suppressed, and the small collapse resulting therefrom can be prevented. Therefore, the slope protection tool 1 is suitable for use on the slope N where the fall of rock falls is likely to occur and the slope N where erosion is likely to occur, and also contributes to the suppression of frost heave on the slope N. The protection method can be applied 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 accommodated in the base material bag 4 germinate and grow, and are more active. Greening can be performed. Even when the slope protection tool 1 does not contain plant seeds, it is possible to effectively capture the flying seeds from the surrounding vegetation in the vegetation base 10 formed in a step shape on the mountain side of the mortar bag 3. The plant will germinate and grow. Therefore, the greening coating of the slope N is surely performed over substantially the entire surface.

  Moreover, although the mortar formed by the dry mortar 3b of the mortar bag 3 has a high compressive strength but a low bending strength, there is a problem that the mortar after curing is easily broken, but there is a problem that the high strength fiber that increases the strength of the bag 3a. 8 makes it difficult to break the mortar. Further, the bag-like body 3a of the mortar bag 3 is thick and water does not sufficiently penetrate into 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 sufficient. Even if it is not cured, the bag-like body 3a can be retained by the high-strength fibers 8.

  Moreover, in the slope protection tool 1 of this example, since the high strength fibers 8 are sandwiched between the inner bag body 6 and the outer bag body 7 in the bag-like body 3a of the mortar bag 3, the mortar bag 3 is dry mortar. It is possible to prevent the high-strength fibers 8 from being peeled when the 3b is accommodated, and the moisture retention performance is improved by forming a space in the three-layer structure of the bag-like body 3a, thereby curing the mortar. It can also be expected that the effect will increase (higher strength).

  By the way, if the dry mortar 3b has absorbed moisture and moisture and hardened before laying the slope protection tool 1 on the slope N, the bag-like body 3a becomes the slope N after laying on the slope N. There is a possibility that a sufficient step effect cannot be obtained without being in close contact with the irregularities. Therefore, in the slope protecting tool 1 of this example, as shown in FIGS. 1 (A) and 3 (A), a moisture absorbent bag (drying bag) 13 containing a desiccant and having water permeability or moisture permeability is connected to a net. It is attached to the body 2. Specifically, the net-like body 2 is provided with a storage portion 5a having the same configuration as the storage portion 5, and the hygroscopic bag 13 is stored in the storage portion 5a.

  As a desiccant to be accommodated in the hygroscopic bag 13, quick minerals, silica gel, clay minerals such as bentonite, and calcium chloride are conceivable. Since these desiccants have characteristics, they are usually used alone, but may be used in combination.

  And the hygroscopic bag 13 should just be mounted | worn with at least 1 or more with respect to the 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). However, the mounting position is not limited to this, and the slope protection tool 1 (net-like body 2) is centered. It may be a part.

Similar to the mortar bag 3 and the vegetation bag 4, the hygroscopic bag 13 has an elongated cylindrical shape whose both ends are closed, and its length is approximately the same as the width of the net-like body 2 (the length of the accommodating portion 5 a). However, when the moisture absorbing bag 13 is formed into a single long and narrow bag shape, the unevenness of the desiccant contained in the bag becomes a problem. Therefore, in this example, in order to prevent / reduce the unevenness of the desiccant, the desiccant is accommodated in each of a plurality of (for example, about 10) sachets connected in a belt 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 ).

  The slope protection tool 1 of this example is normally stored and distributed in a rolled state as shown in FIG. 1B until it is laid on the slope N. By being attached, 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 hardening of the dry mortar 3b, it is preferable to prevent the slope protection tool 1 before laying on the slope N from coming into contact with the outside air including moisture and moisture as much as possible. It is conceivable to pack with a moisture-proof film such as a highly effective aluminum vapor-deposited film or silica vapor-deposited film, and a moisture-proof film (thickness 120 μm) laminated with nylon or the like is relatively inexpensive and excellent in usability.

  Further, as shown in FIG. 1 (B), the slope protection tool 1 is put in a sealing bag 14 formed of these moisture-proof films, and the mouth of the sealing bag 14 is sealed by heat sealing or the like with the air being evacuated as much as possible. Is sealed, the bag 3a (mortar 3) containing the dry mortar 3b and the hygroscopic bag 13 are vacuum-packed.

  When the desiccant is not used as described above, the dry mortar 3b may be cured within one month. However, when the moisture absorbent bag 13 is used and the vacuum pack is used as described above, half a year. The state where the dry mortar 3b is not cured can be maintained.

  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 while being attached to the net 2. When quicklime is used as a desiccant, the effect of adjusting the pH of the soil and the effect of supplying calcium as a nutrient component are obtained. Silica gel supplies silicon and is expected to suppress the lodging of gramineous plants. Moreover, since clay minerals, such as bentonite, have fertilizer power in addition to water retention, the effect of holding the fertilizer part which will be washed away can be expected. And not discarding the hygroscopic bag 13 containing the desiccant leads to an advantage that no dust is generated at the construction site.

  Moreover, when the slope protection tool 1 is packed, when the vacuum packing is performed, 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. Further, due to the hardening associated with the vacuum pack, it is difficult for the cargo to collapse during transportation or the like, and the effects of being easy to carry can be obtained.

  In addition, this invention is not limited to said embodiment at all, Of course, it can change and implement variously in the range which does not deviate from the summary of this invention. For example, the following modifications can be given.

  When the slope protection method is carried out, the slope protection tool 1 integrated in advance may be laid on the slope N. For example, the slope protection tool 1 in a state where the bags 3, 4 and 13 are not mounted. May be inserted into the accommodating portions 5 and 5a, and in this case, the slope protection tool 1 is reduced in weight and transported to the slope N. This can be done with a small number of people.

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

  The net-like member 2 is formed using, for example, biodegradable material such as soft cotton, pulp fiber, synthetic resin, soluble material or water-degradable material, and is configured to pass water and plant buds and roots. The formed sheet-like member (not shown) may be provided by appropriate means such as sticking. In this case, a vegetation base material, which is appropriately selected from vegetation seeds, fertilizers, soil improvement materials, water retention materials, and the like, is attached to the lower surface of the sheet-like member with a water-soluble paste material. It is desirable that the vegetation base material be supported. The sheet-like member may be formed by thinly extending a thin rayon cotton.

  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, the anchor Both of them may be laid on the slope N by placing a fixing member 9 such as a pin.

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

  In the example shown in FIGS. 1 (A) and 3 (A), the housing portion 5a for housing the moisture-absorbing bag 13 is provided separately from the housing portion 5, but not limited thereto, the housing portion 5a is provided. Instead, the hygroscopic bag 13 may be accommodated in the accommodating portion 5. Further, the net-like member 2 shown in FIG. 1A is provided with the accommodating portions 5 and 5a, but is not provided with the accommodating portions 5 and 5a. For example, each bag 3, 4 and 13 is netted with a rope or a wire. You may make it bind to the shape member 2.

  The slope protection method performed by laying the slope protection tool 1 is suitable for implementation on a slope, and the slope N is an example of a slope. For example, the slope protection method is performed on a flat ground or the like. Needless to say. However, the slope protecting method is more suitable for implementation on the slope N in that the step effect is 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 portion 5. The mortar bag 3 is accommodated in one accommodating part 5 and the base material bag 4 is accommodated in the remaining accommodating part 5 or the mortar bag 3 is accommodated in all the accommodating parts 5 without using the base material bag 4. The ratio in which the mortar bag 3 and the base material bag 4 are accommodated can be changed as appropriate.

  In the said embodiment, although the mortar bag 3 which accommodated the dry mortar 3b in the bag-shaped body 3a is used, it is not restricted to this, For example, cement-type materials, such as dry cement which does not contain an aggregate, gypsum etc. A bag (cured bag) formed by containing the material in the bag-like body 3 a may be used in place of the mortar bag 3.

  Although the bag-like body 3a shown in FIG. 2 has a three-layer structure, the present invention is not limited to this. For example, the inner bag body 6 is eliminated and the high-strength fibers 8 are exposed inside the bag-like body 3a. Alternatively, conversely, the outer bag 7 may be eliminated and the high strength fibers 8 may be exposed on the outside of the bag 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 keeping the center with a spacer such as a paper lantern spacer (not shown). By doing so, it can be set as the mortar bag 3 with higher strength, and after the slope protection tool 1 is laid on the slope N, the bag shape is used until or after the dry mortar 3b of the mortar bag 3 is cured. You may make it the body 3a maintain the state along the slope N favorably.

  In the bag-like body 3a of the mortar bag 3 shown in FIG. 2, the high-strength fibers 8 are provided in a cylindrical shape or bag shape covering the outer surface of the inner bag body 6 and the entire inner surface of the outer bag body 7. Not limited to this, the high-strength fibers 8 may be configured to increase the strength in the longitudinal direction of the bag-like body 3a. Therefore, for example, as shown in FIG. 4 (A), the high-strength fibers 8 are fixed to the sheet-like outer bag body 7 in a striped manner, and as shown in FIG. The outer bag body 7 may be rounded into a cylindrical shape so that the bag body 3a is formed by closing the edge. In this formation process, the inner bag body 6 may be provided, or the high strength fibers 8 are provided not in the outer bag body 7 but in the inner bag body 6 so that the high strength fibers 8 are on the outside. 6 may be rounded to form a cylinder. In any case, since the high strength fiber 8 has a portion extending in the longitudinal direction of the bag-shaped body 3a in the formed bag-shaped body 3a, the strength in the longitudinal direction of the bag-shaped body 3a is increased.

  4A and 4B, the high-strength fiber 8 has only a portion extending in the longitudinal direction of the bag-like body 3a, but a portion extending in the circumferential direction of the bag-like body 3a. As an example, for example, as shown in FIGS. 5A and 5B, the high-strength fibers 8 can be formed in a lattice shape.

  The high-strength fibers 8 can be variously provided within a range in which the strength in the longitudinal direction of the bag-like body 3a can be increased. For example, as shown in FIG. Or provided so that it may pass on the diagonal of the outer bag body 7, or when the inner bag body 6 or the outer bag body 7 is rolled up cylindrically, it provides so that the high strength fiber 8 may extend spirally (FIG. 6 (B ))).

  When the mortar flows out of the mortar bag 3 due to the supply of moisture 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 mainly from the mortar bag 3 to the valley side of the mortar bag 3, as shown in FIG. 7, FIG. 8 (A) and FIG. If the Japanese bag 11 is arrange | positioned, the bad influence to the vegetation by mortar outflow can be suppressed. In order to reliably obtain such an effect, 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 when the slope protection tool 1 is laid on the slope N. .

  The neutralization bag 11 is a bag-shaped body 11a having an elongated cylindrical shape whose both ends are closed, and an alkali neutralizing agent 11b accommodated therein. The bag-like body 11a can be formed using a sheet-like body having water permeability or moisture permeability without passing through the alkali neutralizer 11b, and the same material as the bag bodies 6 and 7 is used as the material. Can do. The alkali neutralizer 11b includes, for example, a material obtained by contacting hydrochloric acid with a carbon material treated with peat moss (acidic) or acid (for example, a carbonized plant body carbonized after contacting with a solution containing calcium chloride). ) Can be used.

  In the example shown in FIGS. 7, 8 </ b> A and 8 </ b> B, the mortar bag 3 and the neutralization bag 11 are accommodated in a pair in the accommodating portion 5, and the neutralization bag 11 for preventing mortar outflow is used as the mortar bag. Although the example arrange | positioned only in the valley side of 3 is shown, you may make it arrange | position not only this but the neutralization bag 11 also in the mountain side of the mortar bag 3, and in forms other than the neutralization bag 11 The alkali neutralizer 11b may be disposed around the mortar bag 3.

  In order to promote the germination and growth of plants on the vegetation base 10 formed on the mountain side of the mortar bag 3 (see FIG. 3C), as shown in FIG. 12 may be arranged. In the example of illustration, the mortar bag 3 and the fertilizer bag 12 are accommodated in one accommodation part 5 in a pair. In this case, the base material bag 4 can be used instead of the fertilizer bag 12. In addition, as the fertilizer bag 12, for example, the contents of the base material bag 4 can be specialized in fertilizer.

  Moreover, you may make it accommodate the mortar bag 3, the neutralization bag 11, and the base material bag 4 (or fertilizer bag 12) in the one accommodating part 5. FIG. 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.

  Moreover, in the example shown to FIG. 7, FIG. 8 (A) and (B), although the mortar bag 3 and the neutralization bag 11 are accommodated in the one accommodating part 5, it does not restrict to this, For example, FIG. ), A plurality of storage portions 5 arranged in succession on the net-like member 2 may be provided, and the mortar bag 3 and the neutralization bag 11 may be stored in each storage portion 5 individually. 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. 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 housing part 5 are individually provided. Although the fixing member 9 penetrates, only the mountain-side mortar bag 3 out of the mortar bag 3 and the neutralization bag 11 may be penetrated and fixed by the fixing member 9. 3 (B) and 3 (C), the mortar bag 3 housed alone in the housing portion 5 is individually fixed by the fixing member 9 and fixed to the slope N, and the base material bag. 4 is similarly fixed.

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

  Moreover, in each said example, although the strength of the longitudinal direction of the bag-shaped body 3a is increased with the high strength fiber 8, such a high strength fiber 8 does not need to be used.

DESCRIPTION OF SYMBOLS 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 Housing part 5a Housing part 6 Inner bag body 7 Outer bag body 8 High-strength fiber 9 Fixing member DESCRIPTION OF SYMBOLS 10 Vegetation base 11 Neutralization bag 11a Bag-like body 11b Alkali neutralizer 12 Fertilizer bag 13 Hygroscopic bag N Slope

Claims (4)

  A slope protection device comprising a bag-like body that contains a curable material that is cured by water absorption or moisture absorption and has water permeability or moisture permeability, and a moisture absorption bag that contains a desiccant and has water permeability or moisture permeability.   The slope protecting tool according to claim 1, further comprising a sealing bag for sealing the bag-like body and the hygroscopic bag.   A slope protecting method for laying the slope protecting tool according to claim 1 on a slope. A slope protecting method for laying the slope protecting tool according to claim 2 on a slope, wherein the bag-like body taken out from the sealing bag and the hygroscopic bag are laid on the slope.