JP7341472B2 - Mountainside preservation materials - Google Patents

Description

The present invention relates to a mountainside preservation technique that prevents soil erosion caused by rainwater on sloped lands, etc., and more particularly to a soil erosion prevention technique that dams up solid matter such as earth and sand, fallen branches and leaves, and slows down water to pass through.

In forests, mountains, hills, pastures, road slopes, etc., the ground surface becomes exposed when vegetation disappears due to weather disasters, damage by wild animals, etc., or withers due to volcanic gas. This kind of rough ground surface is susceptible to rain crack erosion, and eventually narrow grooves (rills) are formed, and excavated earth and sand are carried by water and erosion progresses, resulting in the formation of swamp-like topography (gully). occurs.

An earth and sand damming body has been proposed that has water permeability that can dam the earth and sand transported in this way, suppress the growth of rills and gullies, and restore vegetation (Patent Document 1). This earth and sand damming body has a wound body in which a net such as a wire mesh is wound (rolled up) multiple times into a roll shape, and a filling material spread inside the wound body and filled in a roll shape, It is formed in a spindle shape that is thick at the center and whose outer diameter decreases toward both ends (hereinafter referred to as a filling type earth and sand dam body).

The rolled body of the filled earth and sand dam has a crescent-shaped appearance, and both ends of the rolled body are installed upstream of the flowing water from the center of the rolled body, and are fixed to the ground with anchors or the like. The earth and sand carried by the flowing water is dammed up on the surface of the rolled body facing the flowing water, but the water passes through the rolled body and flows downstream. When passing through the wound body, as the interior becomes more and more filled, a filter effect acts throughout the interior. Compared to methods that use a single sheet or only the surface to stop soil, sand, water, and soil, it forms a three-dimensional filter with a high porosity, so there is less clogging when it is filled. The earth and sand dammed up on the front side of the roll body is deposited, the soil recovers on the upstream side of the roll body, and scour is prevented on the downstream side, forming a hardened floor, which improves the microenvironment around the construction site. Contribute to conservation.

The filled earth and sand dam disclosed in Patent Document 1 not only has excellent workability in that it does not require foundation work and can be transported by hand, but also prioritizes ecosystem conservation and is effective against soil conservation and vegetation growth. It has an excellent property of recovering.

Japanese Patent Application Publication No. 2015-143468

By the way, the above-mentioned filling type earth and sand damming body is heavy, and the length and size that one worker can lift and transport is naturally limited. In addition, as the length of the filled earth and sand damming body increases, so does the weight, so installation locations tend to be limited. For this reason, it is not suitable for workers to transport the filled earth and sand dam body up a steep slope in an altitude direction, such as from the foot of a mountain or halfway up a mountain to near the top.

An object of the present invention is to provide a mountainside maintenance material that is lightweight and easy to assemble at a work site.

A first configuration of the mountainside maintenance material that achieves the object of the present invention relates to the mountainside maintenance material placed on the mountainside. This mountainside preservation material is formed into a roll shape by winding up multiple layers of wire mesh in a spiral cross-section, with spaces formed in each of the multiple layers, and a core coil having coil-shaped spring properties wound along the longitudinal direction. a rolled wire mesh structure main body disposed at the center of rotation, and space holding parts arranged at a plurality of locations along the longitudinal direction of the rolled wire mesh structure main body to hold the spaces of the plurality of layers in the radial direction. Consists of a rolled wire mesh structure.

A second structure of the mountainside preservation material that achieves the object of the present invention is that in the mountainside preservation material having the above structure , the space retaining portions are orthogonal to each other with respect to the longitudinal direction of the rolled wire mesh structure body. It can be constituted by a cross coil having spring properties that is formed into a coil shape along the direction.

According to the mountainside maintenance material according to the present invention, the weight of the mountainside maintenance material can be reduced, and the overall rigidity can also be increased. Therefore, sufficient earth and sand damming capacity and drainage capacity can be maintained, and it is also possible to improve transportability and facilitate installation work.

The first embodiment of the mountainside maintenance material according to the present invention is shown, in which (a) is an external top view of a spindle-shaped rolled wire mesh structure, (b) is an external top view of a cylindrical rolled wire mesh structure, and (c) is an external top view of a cylindrical rolled wire mesh structure. It is a view taken along the line AA in (a). In a modification of the first embodiment, (a) is an external top view of a spindle-shaped rolled wire mesh structure, and (b) is an external top view of a cylindrical rolled wire mesh structure. FIG. 2 is a plan view illustrating an example of a wire mesh winding method for the rolled wire mesh structure main body shown in FIG. 1; FIG. 2 is a partial perspective view illustrating a rolled state of the rolled wire mesh structure main body shown in FIG. 1. FIG. FIG. 2 is a partial perspective view illustrating the relationship between a core coil and a cross coil in the mountainside maintenance material shown in FIG. 1. FIG. A second embodiment of the mountainside maintenance material according to the present invention is shown, in which (a) is an external top view of the 3-split spindle type mountainside maintenance material, (b) is an external top view of the 3-split cylindrical mountainside maintenance material, and (c) is FIG. 6(a) is an enlarged top view of the sutured portion, and FIG. 6(d) is a sectional view taken along the line BB in FIG. 6(c). A third embodiment of the mountainside preservation material according to the present invention is shown, in which (a) is a side view of a pyramid-shaped mountainside preservation material stacked in two tiers, (b) is a side view of a pyramid-shaped hillside preservation material stacked in three tiers, and (c ) is a side view of four-tiered pyramid-shaped mountainside preservation materials. A fourth embodiment of the mountainside maintenance material according to the present invention is shown, in which (a) is a side view of a trapezoidal mountainside maintenance material stacked in two tiers, and (b) is a side view of a trapezoidal mountainside maintenance material stacked in three tiers. (a) shows the pyramid-shaped mountainside preservation material shown in FIG. 7(c) installed on a gentle slope, and (b) shows the trapezoid-shaped mountainside protection material shown in FIG. 8(b) installed on a steep slope. The fifth embodiment of the present invention is shown, (a) is a front view showing the construction method of mountainside preservation material, (b) is a top view of FIG. 10(a), and (c) is construction of mountainside preservation material containing wire rope. FIG. 3 is a top view showing the method. (a) is a diagram showing details of the first anchor part shown in FIG. 10(a), and (b) is a diagram showing details of the second anchor part shown in FIG. 10(c). It is a schematic diagram showing the transportation method of the mountainside preservation material showing a 6th embodiment of the present invention. An example of the present invention is shown, in which (a) is an image of the spindle-shaped rolled wire mesh structure shown in FIG. 1(a) viewed from the front during construction, and (b) is an image showing a full water state after construction. It is. An example of the present invention is shown, in which (a) shows an image of a spindle-shaped rolled wire mesh structure corresponding to FIG. 13(a) during construction when viewed from above, and (b) shows a full water state after construction. It is an image.

The present invention will be described below based on embodiments shown in the drawings.

First embodiment

1 to 5 show a first embodiment of a mountainside maintenance material according to the present invention. Note that in FIG. 1, the X-axis direction is the longitudinal direction, and the r direction is the radial direction.

In FIG. 1, the mountainside maintenance material 1 of the present embodiment includes a single spindle-shaped rolled wire mesh structure 1A having a spindle-shaped appearance shown in FIG. There are two types: a single cylindrical rolled wire mesh structure 1B formed in a cylindrical shape. The spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B are composed of a diamond-shaped wire mesh 10, one core coil 20, and a plurality of space holding parts 30 arranged at intervals in the longitudinal direction. It is the same in that it is configured with the book cross coil 31 as the main component, and the only difference is that both ends are tapered or straight from the center to the ends.

The spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B are formed by winding a diamond-shaped wire mesh 10 so that the cross section becomes a spiral shape, as shown in FIG. 1(c). A main body 50 is formed, and a layer thickness is formed in the radial direction between an inner wire mesh portion (inner wire mesh portion) 51 and an outer wire mesh portion (outer wire mesh portion) 52 on the outer peripheral side of the rolled wire mesh structure main body 50. A space S of T is formed. The space S of the rolled wire mesh structure main body 50 is formed in multiple layers. The spaces S in the plural layers of the rolled wire mesh structure main body 50 are held by space holding parts 30 arranged at a plurality of locations in the longitudinal direction. The rolled wire mesh structure main body 50 is composed of a diamond-shaped wire mesh 10 and a core coil 20, and a space holding part 30 is provided in the rolled wire mesh structure main body 50 to form a spindle-shaped rolled wire mesh structure 1A and a cylindrical rolled wire mesh structure. Form 1B.

The installation location and function of the mountainside maintenance material 1 according to the present embodiment will be explained using a spindle-shaped rolled wire mesh structure 1A that constitutes the mountainside maintenance material 1 alone as an example. The spindle-shaped rolled wire mesh structure 1A is installed on a mountainside in a Satochi-satoyama area or the like in a direction to dam the flow of water into a narrow groove (rill) formed by scouring the ground surface, for example. Since most of the rolled wire mesh structure main body 50 is mesh, even if water flows, most of the water will pass through the mesh in the initial stage of installation, but fallen leaves, stones, etc. that flowed with the water will naturally get caught in the mesh. This causes clogging, and water accumulates on the upstream side. However, the flow of water is not completely blocked, and a part of the water passes through the mesh, reducing the flow velocity and creating a parrying situation in which water is discharged downstream.

Furthermore, water accumulated in a portion (hereinafter referred to as a pit) where water, gravel, sand, etc. are temporarily stored on the upstream side of the spindle-shaped rolled wire mesh structure 1A, is removed when the flow rate of water flowing through the rill decreases. Water is discharged downstream through the layers of the wire mesh of the spindle-shaped rolled wire mesh structure 1A, but the soil, gravel, litter, etc. accumulated in the pit are deposited in the pit. The rolled wire mesh structures 1A and 1B correspond to gentle surface water, and a few branches and leaves get entangled with the iron wires that make up the rolled wire mesh structures 1A and 1B, and earth and sand get involved and cause filling. We accept both extremes, such as instantaneous filling with large amounts of debris (transferred materials such as earth and sand). In the rolled wire mesh structures 1A and 1B, the mesh of the rhombic wire mesh 10 is made small in the case of a small size with a small outer diameter, and the mesh of the rhomboid wire mesh 10 is made large in the case of a large size with a large outer diameter. . In the case of small size, the rolled wire mesh structures 1A and 1B have a dense iron wire density and are suitable for capturing fine objects, whereas the large size rolled wire mesh structures 1A and 1B have a coarse iron wire density and are therefore slightly larger. It is easy to capture fallen debris such as gravel and relatively irregular branches and roots.

By slowing down the running water, the spindle-shaped rolled wire mesh structure 1A suppresses, for example, scouring of the rill, and allows the sediment accumulated in the pit to catch plant seeds flowing from upstream or carried by the wind. It becomes a site and contributes to vegetation recovery.

Next, in this embodiment, as shown in FIG. 1(a), when the width W, which is the length in the longitudinal direction of the spindle-shaped rolled wire mesh structure 1A, is 1.5 m, the rolled wire mesh structure main body 50 Space retaining parts 30 are arranged at three locations at positions that equally divide the width W of into four, excluding both ends. Further, as shown in FIG. 1(b), in the cylindrical rolled wire mesh structure 1B, when the width W is, for example, 1.5 m, at the position where the width W of the rolled wire mesh structure body 50 is divided into four equal parts, Space holding parts 30 are arranged at five locations including both ends. In the cylindrical rolled wire mesh structure 1B, by arranging the space retaining portions 30 at both ends in the width direction of the rolled wire mesh structure main body 50, the outer diameter MD of the cylindrical rolled wire mesh structure 1B is kept constant in the longitudinal direction. , maintaining a cylindrical appearance. On the other hand, unlike the cylindrical rolled wire mesh structure 1B, the spindle-shaped rolled wire mesh structure 1A does not have the space holding portions 30 arranged at both ends in the width direction of the rolled wire mesh structure main body 50. A space S having a layer thickness T is not maintained, and the rolled wire mesh structure main body 50 is formed into a spindle shape whose outer diameter gradually decreases toward both ends in the longitudinal direction.

Modification of the first embodiment

FIG. 2 shows a modification of the first embodiment. When the width W of the spindle-shaped rolled wire mesh structure 1A is, for example, 2 m, the width W of the rolled wire mesh structure main body 50 is changed as shown in FIG. 2(a). Space retaining parts 30 are arranged at four locations at positions where the space is divided into five equal parts, excluding both ends. When the width W of the cylindrical rolled wire mesh structure 1B is, for example, 2 m, as shown in FIG. The space holding portions 30 are arranged at six locations including the space holding portions 30. The configuration of the space holding section 30 will be described later.

Here, the configuration of the rhombic wire mesh 10 will be explained.

As shown in FIG. 3, the rhombic wire mesh 10 has column lines 11 of a predetermined length, which are formed by bending wire rods in a dogleg shape, connected along the row direction. The structure is such that the points are hooked together. If the portion where the bending points hook each other is referred to as a connecting portion 12, the row lines 11 can rotate relative to each other using the connecting portion 12 as a fulcrum. Furthermore, when adjacent row lines 11 are pulled apart from each other, they are engaged at the connecting portions 12 to prevent further movement. At both ends of the diamond-shaped wire mesh 10, short wire portions 13 extending short from the connecting portions 12 of the row lines 11 toward the tip side are bent horizontally, which is called a horizontal knuckle. The bent configuration is called a complete knuckle (or twist), and the present embodiment has a complete knuckle configuration. This complete knuckle treatment prevents one column line 11 from spiraling toward the other column line 11, making it easier to handle the diamond-shaped wire mesh 10. Further, in the adjacent row lines 11, a frame surrounded by two connecting portions 12 adjacent in the row direction is called a diamond-shaped mesh, and the length of the mesh in the row direction is the length of the mesh.

As shown in FIG. 1(c), a core coil 20 serving as a core material of the spindle-shaped rolled wire mesh structure 1A is arranged along the longitudinal direction at the winding center O of the rolled wire mesh structure main body 50. The core coil 20 is formed of a steel wire into a coil shape, and has the same length in the longitudinal direction as the row lines 11 of the rhombic wire mesh 10. The core coil 20 plays the role of a backbone, and has the effect of suppressing deflection in the longitudinal direction of the rolled wire mesh structure main body 50 due to its bending rigidity. Due to this action, when the spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B are placed horizontally with both ends supported, they bend into a crescent shape under the action of gravity.

The core coil 20 has a coil shape and contributes to reducing the total weight of the spindle-shaped dam body 1A. The diameter D1 of the core coil 20 is, for example, 0.25 times the outer diameter MD (D1=0 .25MD). Further, the pitch P1 of the core coil 20 can be set to, for example, 1.5 times the diameter D1 of the core coil 20 (P=1.5D). Further, as shown in FIG. 1C, the rolled wire mesh structure main body 50 is formed by winding the rhombic wire mesh 10 in, for example, three layers.

A method for manufacturing the spindle-shaped rolled wire mesh structure 1A and the configuration of the space holding section 30 will be described below with reference to FIGS. 3 to 5.

In FIG. 3, the diamond-shaped wire mesh 10 will be described assuming that the width W in the longitudinal direction of the column lines 11 is 1.5 m, and the length L in the row direction is 1.5 m. The rhombic wire mesh 10 is spread out on a workbench (not shown), and the core coil 20 is fixed to one end 14 of the rhombic wire mesh 10 in the row direction using a wire or the like (not shown). Further, a pair of left and right spacers 15 and 16 are placed on the upper surface of the diamond-shaped wire mesh 10 with a gap Q in the center in the width direction. The spacers 15 and 16 are bendable sheet-like members having, for example, the same thickness as the layer thickness T, and can be extracted outward in the row direction.

Next, the core coil 20 is wound up to the other end 17 in the row direction while winding the diamond-shaped wire mesh 10 and a pair of left and right spacers 15 and 16 around the core coil 20, with one end 14 in the row direction serving as the winding start end. The rolled wire mesh structure main body 50 is formed by fixing it to the mesh of the lower diamond-shaped wire mesh 10 with the illustrated wire or the like.

FIG. 4 shows the wire mesh portions 51 and 52 of each layer and the core coil 20 in a state where the winding work of the diamond-shaped wire mesh 10 has been completed and the rolled wire mesh structure main body 50 has been formed (illustration of the spacers 15 and 16 is omitted). In the partial perspective view shown, a space S is formed in each layer formed between an inner wire mesh portion 51 and an outer wire mesh portion 52. As described above, the diamond-shaped wire mesh 10 has a structure in which the column lines 11 adjacent in the row direction are engaged with each other at the portions bent in a dogleg shape at the connecting portions 12. For this reason, an external force is applied to the wire mesh portions 51 and 52 constituting each layer from the inner circumferential side to the outer circumferential side, and the row lines 11 constituting the connecting portion 12 are pulled toward the outer side in the opposite circumferential direction. Unless a tensile force is applied, the space S cannot be maintained at the layer thickness T.

However, after the diamond-shaped wire mesh 10 is spirally wound to form the rolled wire mesh structure main body 50, when the left and right spacers 15, 16 are completely pulled out in the row direction, the row lines 11 at the connecting portion 12 are The tension ceases to act, the layer thickness T of the space S of each layer is not maintained, and the rolled wire mesh structure main body 50 collapses into a flat shape as a whole under its own weight.

In this embodiment, the space retaining section 30 maintains the layer thickness T of the space S in each layer of the rolled wire mesh structure body 50. The space holding section 30 is composed of a cross coil 31 having an outer diameter larger than the mesh size of the rhombic wire mesh 10.

As shown in FIG. 5, the space holding part 30 has an Each cross coil 31 is screwed in along the Y axis. The cross coil 31 has two types: a full-length type in which the length in the axial direction is approximately the same length as the outer diameter at the screwed-in position of the rolled wire mesh structure main body 50; There is a half-length type with a length that is approximately half the outer diameter.

The full length type cross coil 31 is used when the outer diameter MD of the spindle-shaped rolled wire mesh structure 1A at the arrangement position of the space holding part 30 is about several tens of centimeters, and is arranged in a cross shape in the X-axis direction and the Y-axis direction. be done. That is, two cross coils 31 are used in one space holding section 30.

On the other hand, the half-length type cross coils 31 are used in sets of two for the X-axis and the Y-axis, respectively. It is preferable to use it when the outer diameter MD of the spindle-shaped rolled wire mesh structure 1A is large, and the half-length type cross coil 31 is preferably used when the outer diameter MD of the spindle-shaped rolled wire mesh structure 1A is large. It is screwed in from the outside of the rolled wire mesh structure main body 50. In the Y-axis direction, the two cross coils 31 are similarly screwed toward the winding center O. That is, four cross coils 31 are used in one space holding section 30. In the following description, a case where a full length type cross coil 31 is used will be taken as an example.

The cross coil 31 is configured, for example, in the form of a compression coil spring wound around a right-handed screw at a predetermined pitch. The cross coil 31 has a screw-in tip 32 formed in an arc shape, and a tip 32a of the screw-in tip 32 is a free end. The pitch P1 of the cross coil 31 is set smaller than the layer thickness T of the spindle-shaped rolled wire mesh structure 1A. The cross coil 31 is screwed in so that the tip 32 is positioned so as to surround the mesh of the wire mesh portion 10c on the outermost peripheral surface, the tip 32a is inserted inside the row line 11, and the other end 33 is screwed in a right-handed rotation. By turning, the cross coil 31 spirals toward the winding center O.

As the cross coil 31 spirals, the tip 32a of the cross coil 31 enters the mesh and advances while turning, and the coil wire of the cross coil 31 becomes entangled with the row wire 11, thereby elastically maintaining the layer thickness T of the space S. By screwing the cross coil 31 into the spirally wound diamond-shaped wire mesh 10 in both the X-axis direction and the Y-axis direction over the outer diameter MD of the rolled wire mesh structure main body 50, the space holding part 30 is The outer diameter MD is maintained in the circumferential direction at the arranged position. Although not shown, the rear end portion 32b of the cross coil 31 is bent into a hairpin shape or a swan's beak shape, and is locked to the row line 11 of the outermost wire mesh portion of the rolled wire mesh structure main body 50. It applies an elastic force directed outward in the radial direction and prevents rotation in the direction opposite to the screwing direction.

To further explain the action of the cross coil 31, the cross coil 31 curves into an arc shape between the row line 11 of the inner wire mesh portion 51 of the rolled wire mesh structure body 50 and the row line 11 of the outer wire mesh portion 52. The coil wire rods that are in contact with each other. In the cross coil 31, for example, one pitch of coil wire exists in a spiral shape between an inner wire mesh portion 51 and an outer wire mesh portion 52 with which the coil wire comes into contact. Therefore, the elastic force of the cross coil 31 that is biased toward the outside in the axial direction elastically biases the inner wire mesh portion 51 and the outer wire mesh portion 52 in opposite directions.

As shown in FIG. 3, since a gap Q exists in the longitudinal center portion sandwiched between the left and right spacers 15 and 16, space is maintained in the center portion of the rolled wire mesh structure body 50 immediately after winding. A cross coil 31 for the section 30 can be screwed in. However, the screwing of the cross coil 31 is inhibited by the left and right spacers 15 and 16 in the left and right space holding parts 30 disposed on the left and right sides of the central portion. Therefore, the left and right spacers 15 and 16 are pulled out toward the outside in the longitudinal direction to the positions where the left and right space holding parts 30 are arranged. By pulling this out, the cross coils 31 constituting the left and right space holding parts 30 can be screwed in in the X-axis direction and the Y-axis direction.

Then, the left and right spacers 15 and 16 are further pulled outward in the longitudinal direction, and the left and right spacers 15 and 16 are completely pulled out from both ends of the rolled wire mesh structure main body 50 in the longitudinal direction. Since there is a sufficient length from the left and right space holding parts 30 to both left and right ends of the rolled wire mesh structure main body 50, the row lines 11 of the rhombic wire mesh 10 located therebetween are in a cantilevered state and are bent by their own weight. . Therefore, the spindle-shaped rolled wire mesh structure 1A has a spindle shape in which the outer diameter gradually decreases from the placement position of the left and right space holding parts 30 to both left and right ends of the rolled wire mesh structure main body 50.

In addition, the wire of the cross coil 31 does not undergo plastic deformation even when an adult stands on the spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B, for example, when they are installed horizontally. It is desirable to have spring rigidity that provides elastic force to return to the original state when an adult descends from above and releases the load.

The space holding parts 30 arranged at three locations along the longitudinal direction of the rolled wire mesh structure main body 50 have cross coils 31 arranged in directions orthogonal to each other. may be oriented as shown in FIG. 1(c) (12 o'clock to 6 o'clock, 3 o'clock to 9 o'clock in terms of clock hands); Alternatively, the directions of the orthogonal cross coils 31 of the space holding portions 30 on both sides thereof may be shifted by, for example, 45 degrees.

The construction method of the spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B according to this embodiment will be described later.

Second embodiment

FIG. 6 shows a second embodiment of the mountainside maintenance material according to the present invention. The mountainside maintenance material 2 of this embodiment has a divided structure in which a plurality of rolled wire mesh structures 1A and 1B, each including a rolled wire mesh structure main body 50 as shown in FIG. 1, are connected in series along the longitudinal direction. There is.

FIG. 6(a) is a top view showing the external shape of the three-part spindle-shaped mountainside maintenance material 2A, and FIG. 6(b) is a top view showing the external shape of the three-part cylindrical mountainside maintenance material 2B.

The three-split spindle-shaped mountainside preservation material 2A has single-spindle-shaped rolled wire mesh structures 1C symmetrically provided on both left and right sides of the cylindrical rolled wire mesh structure 1B shown in FIG. The structure is connected by. The single spindle type rolled wire mesh structure 1C maintains the shape of one end of the spindle type rolled wire mesh structure 1A shown in FIG. 1(a) in a spindle shape, and the other end is shown in FIG. 1(b). It has a cylindrical shape like the cylindrical rolled wire mesh structure 1B. The three-part cylindrical mountainside maintenance material 2B has a configuration in which three cylindrical rolled wire mesh structures 1B are connected in series in the longitudinal direction by a suture portion 40.

The spindle-shaped rolled wire mesh structure 1A shown in FIG. 1(a) and the cylindrical rolled wire mesh structure 1B shown in FIG. 1(b) have a width W, which is the length in the longitudinal direction, of 1.5 m, for example. The weight including the core coil 20 and cross coil 31 is approximately 3 kg. If the width W of the spindle-shaped rolled wire mesh structure 1A shown in FIG. 1(a) and the cylindrical rolled wire mesh structure 1B shown in FIG. 1(b) is tripled to 4.5 m, the space retention Since the number of parts 30 also increases, the weight becomes 9 kg or more, which is three times the length. For example, if the spindle-shaped rolled wire mesh structure 1A is 4.5 m long, it is difficult for a worker to carry it on his/her back and transport it through the mountains. In addition, when a drone is used as a means of transporting the spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B, one of the spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B is The weight is limited, and the width W, which is the length in the longitudinal direction, is also limited. Due to the transportation capacity of currently available drones powered by electric motors, the upper limit of the width and weight of one of the spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B has been set to 1.5 m, for example. , the weight limit is 3 kg.

Note that if the drone is not used as a means of transportation, such weight and length limitations can be ignored, but if the width of the spindle-shaped rolled wire mesh structure 1A and the cylindrical rolled wire mesh structure 1B is Being short and light in weight is very advantageous in terms of transportation and transportation to the installation site, and is not limited to drones.

The three-split spindle-shaped mountainside maintenance material 2A of this embodiment is composed of two single-spindle-shaped rolled wire mesh structures 1C and one cylindrical rolled wire mesh structure 1B, and the cylindrical rolled wire mesh structure is formed at the installation site. A single spindle-shaped rolled wire mesh structure 1C is connected to both ends of the structure 1B by stitching at seams 40, respectively. Since the connection by the suture part 40 can be performed at the installation site, no special tools are required.As shown in FIGS. 6(c) and (d), the first suture has the same compression spring structure as the cross coil 31 It is composed of a coil 41 and a second suturing coil 42. The number of first suturing coils 41 is two, similar to the full length type cross coil 31, and the number of second suturing coils 42 is four.

The suture portion 40 is formed so as to pass through the winding center O, with the connecting side end face of the single spindle type rolled wire mesh structure 1C and the connecting side end face of the cylindrical rolled wire mesh structure 1B abutted against each other as much as possible without any gaps. Along the radial direction, it is screwed in the X-axis direction and the Y-axis direction, respectively, over the outer diameter MD. At this time, the meshes of the connecting end portions that abut each other are integrally engaged by the first sewing coil 41. Next, the second suture coil 42 is screwed in along the circumferential direction so as to be caught in the mesh between the connecting side end faces on the outermost peripheral surface of the rolled wire mesh structure main body 50, so that both ends of the wire mesh that are abutted are It looks like it's being sewn together. The second suturing coils 42 are provided at outer ends of the first suturing coils 41, respectively.

Therefore, the wire meshes of the first suture coil 41 and the second suture coil 42 can be connected to each other at the same position in the circumferential direction, and a strong connection is possible. Further, the wire mesh portions of each layer that abut against each other in the longitudinal direction are out of reach from the outside of the rolled wire mesh structure main body 50. However, the abutted wire meshes can be connected to each other by a simple operation of screwing in the first sewing coil 41 from the outside in the radial direction.

The connection structure of the 3-split cylindrical mountainside maintenance material 2B by the sutured portion 40 is the same as that of the 3-split spindle-shaped mountainside maintenance material 2A, so a description thereof will be omitted.

Third embodiment

FIG. 7 shows a third embodiment of the invention.

Regarding the mountainside maintenance material 1 shown in FIG. 1, when the damming height H is increased, the outer diameter of the core coil 20 becomes larger. As the outer diameter of the core coil 20 increases, the length of the diamond-shaped wire mesh 10 in the row direction increases, and the length of the cross coil 31 also increases, resulting in a significant increase in weight, which greatly exceeds the weight limit of, for example, 3 kg. Therefore, this embodiment is a pyramid-stacked structure that can obtain a desired height H by stacking a plurality of rolled wire mesh structures 1A and 1B of the type shown in FIGS. 1(a) and 1(b) in multiple stages. Mountainside preservation materials (hereinafter referred to as pyramid-shaped mountainside preservation materials) 3 are provided.

The pyramid-shaped mountainside maintenance material 3 shown in FIG. 7 is an example in which the spindle-shaped rolled wire mesh structures 1A shown in FIG. A cross-sectional view at the central part is shown.

The pyramid-shaped hillside maintenance material 3A shown in FIG. The wire mesh structure 1A is placed between the spindle-shaped rolled wire mesh structures 1A of the first stage and stacked in a pyramid shape. In order to integrate the three spindle-shaped rolled wire mesh structures 1A piled up in a pyramid shape, in this embodiment, the three spindles are connected by a plurality of binding parts 60 arranged at appropriate intervals along the longitudinal direction. The rolled wire mesh structures 1A are tied together.

The binding section 60 is composed of three binding coils, a first binding coil 61, a second binding coil 62, and a third binding coil 63, which have the same structure as the cross coil 31. By screwing the first binding coil 61 in the diametrical direction along one horizontal direction into the two spindle-shaped rolled wire mesh structures 1A juxtaposed in the first stage, the two spindle-shaped rolled wire mesh structures 1A are assembled. The structures 1A are tied together.

The second bundling coil 62 is twisted diametrically from diagonally above to the diagonally lower right direction for the spindle-shaped rolled wire mesh structure 1A in the second stage and the right spindle-shaped rolled wire mesh structure 1A in the first stage. The third bundling coil 63 is attached to the spindle-shaped rolled wire mesh structure 1A in the second stage and the spindle-shaped rolled wire mesh structure 1A on the left side of the first stage in the diametrical direction from diagonally above to the diagonally lower left direction. By screwing in, the upper and lower spindle-shaped rolled wire mesh structures 1A are tied together. As a result, the three spindle-shaped rolled wire mesh structures 1A constituting the two-tiered pyramid-shaped mountainside maintenance material 3A are firmly bound and integrated.

The pyramid-shaped mountainside maintenance material 3B shown in FIG. 7(b) has three spindle-shaped rolled wire mesh structures 1A arranged in parallel on the ground plane GL in the first stage, and two spindle-shaped rolled wire mesh structures in the second stage. The wire mesh structures 1A are arranged side by side, and one spindle-shaped rolled wire mesh structure 1A is placed on the third tier as shown in the figure, so that they are piled up in a pyramid shape. The first bundling coil 61 is screwed into the three spindle-shaped rolled wire mesh structures 1A in the first stage, and the second bundling coil 62 is screwed into the spindle-shaped rolled wire mesh structures 1A at the right end of the first stage, and the two spindle-shaped rolled wire mesh structures 1A in the first stage. The spindle-shaped rolled wire mesh structure 1A on the right side of the eye and the third spindle-shaped rolled wire mesh structure 1A are screwed in in the diametrical direction along the diagonally lower right direction from diagonally above. The third binding coil 63 diagonally connects the left end spindle-shaped rolled wire mesh structure 1A of the first stage, the left spindle-shaped rolled wire mesh structure 1A of the second stage, and the spindle-shaped rolled wire mesh structure 1A of the third stage. Screw in diametrically from the top diagonally along the lower left direction.

The pyramid-shaped mountainside preservation material 3C shown in FIG. 7(c) consists of 4 pieces in the first tier, 3 pieces in the second tier, and 2 pieces in the third tier, as shown in the figure for the spindle-shaped rolled wire mesh structure 1A. , the fourth stage has a stacked configuration of one body. The first binding coil 61, second binding coil 62, and third binding coil 63 are spindles forming each side of the triangle in the same way as the pyramid-shaped mountainside preservation materials 3A and 3B shown in FIGS. 7(a) and 7(b). The mold rolled wire mesh structure 1A is bundled.

The pyramid-shaped mountainside maintenance materials 3A, 3B, and 3C have been explained using the single-configured spindle-shaped rolled wire mesh structure 1A shown in FIG. 1(a) as an example, but the cylindrical roll shown in FIG. 1(b) A shaped wire mesh structure 1B, a three-part spindle-shaped rolled wire mesh structure 2A shown in FIGS. 6(a) and (b), and a three-part cylindrical rolled wire mesh structure 2B may be used.

In this way, the pyramid-shaped mountainside maintenance material 3 of this embodiment can obtain a desired damming height H by stacking a plurality of rolled wire mesh structures 1A, 1B each having a small outer diameter in multiple stages.

Fourth embodiment

FIG. 8 shows a fourth embodiment of the mountainside maintenance material according to the present invention, in which (a) shows a two-tier stack of rolled wire mesh structures 1A and 1B stacked in a trapezoidal shape as shown in FIGS. 1(a) and 1(b). A side view of the trapezoidal mountainside maintenance material 4, (b) is a side view of the trapezoidal mountainside maintenance material 4 stacked in four stages. Figure 9(a) shows the pyramid-shaped mountainside preservation material 3 of Figure 7(c) installed on a gentle slope, and Figure 9(b) shows the trapezoidal mountainside conservation material 3 of Figure 8(b) installed on a steep slope. It is a figure which shows the installed state.

The pyramid-shaped mountainside maintenance material 3 shown in FIG. 7 has a structure in which, for example, spindle-shaped rolled wire mesh structures 1A are stacked in multiple stages, and one spindle-shaped rolled wire mesh structure 1 is placed on the top tier. On the other hand, the trapezoidal mountainside maintenance material 4 of this embodiment has the structure of the pyramidal mountainside maintenance materials 3B and 3C shown in FIGS. It has a trapezoidal configuration.

The trapezoidal mountainside maintenance material 4A shown in Figure 8(a) and the trapezoidal mountainside maintenance material 4B shown in Figure 8(b) are low in height, but are stable even if the slope angle is large when installed on a slope. It is possible to obtain a suitable installation posture. The two conical wire mesh structures 1A at the top are bound together by screwing in the fourth binding coil 64 along the diameter direction.

As shown in FIG. 9(a), when the pyramid-shaped mountainside preservation material 3C with the four-tier structure shown in FIG. 7(c) is installed on a gentle slope GL1 with an inclination angle θ1, water, gravel, etc. flowing down the slope Pressure and friction are concentrated on the uppermost integrated spindle-shaped rolled wire mesh structure 1A. However, although this can be withstood on the gently sloped surface GL1, on the steeply sloped surface, a large burden is placed on the uppermost integrated spindle-shaped rolled wire mesh structure 1A, making it ineffective. For this reason, as shown in FIG. 9(b), trapezoidal mountainside maintenance materials 4B with a three-tier structure are installed on the steep slope GL2 with an inclination angle θ2 (θ2>θ1) that is steeper than the inclination angle θ1. There is. In this case, the two spindle-shaped rolled wire mesh structures 1A placed at the top stage disperse and absorb the pressure from water and earth and sand, so the two spindle-shaped rolled wire mesh structures placed at the top stage 1A can be prevented from being destroyed.

In the embodiments shown in FIGS. 7 to 9, mountainside maintenance materials stacked in multiple stages may be connected and installed in series. At that time, for example, one or more rolled wire mesh structures 1A, 1B may be attached while being shifted in the longitudinal direction. In this case, one end side of the rolled wire mesh structure protrudes in the longitudinal direction, but the other end side becomes a recessed void space, so the mountainside maintenance materials stacked in multiple tiers next to each other in series will protrude into the opposing void space. One end will fit in. This results in a stronger connection.

Fifth embodiment.

FIG. 10 shows a connection structure between an anchor part and a wire rope for fixing a mountainside preservation material to a ground surface according to a fifth embodiment of the present invention.

10(a) and 10(b) show a configuration in which a single spindle-shaped rolled wire mesh structure 1A is fixed to the ground 4 by first anchor portions 70 provided at both ends in the longitudinal direction, and FIG. 10(c) shows the second anchor part 80 for the three-part mountainside maintenance material 2.

FIG. 10(a) is a front view of the spindle-shaped rolled wire mesh structure 1A installed on uneven ground, in which the row lines 11 of the rhombic wire mesh 10 constituting the rolled wire mesh structure main body 50 are made of soft wire. As a result, the diamond-shaped wire mesh 10 contacts the irregularities of the ground 4. In the top view shown in FIG. 10(b), the spindle-shaped rolled wire mesh structure 1A is installed, for example, in a rill with the downstream side curved so as to be convex. As shown in FIG. 11(a), the first anchor portions 70 provided at both longitudinal ends of the spindle-shaped rolled wire mesh structure 1A include an anchor coil 71 having a coil spring shape similar to the cross coil 31, and an anchor coil 71 that is attached to the ground 4. It is composed of an anchor pile 72 into which the lower end is inserted.

The anchor coil 71 is screwed into the spindle-shaped end of the rolled wire mesh structure main body 50 from above. Further, an anchor pile 72 is passed through the inner diameter of the anchor coil 71 from above, and the lower end is inserted into the ground 4 and fixed. The wire rod 71a at the rear end of the anchor coil 71 is passed through a through hole 72a formed at the upper end of the anchor pile 72 and bent to engage the anchor pile 72 and the anchor coil 71. With this configuration, the spindle-shaped rolled wire mesh structure 1A is elastically supported by the anchor pile 72 via the anchor coil 71, and the anchor coil 71 can freely move within the space between it and the anchor pile 72. .

By the way, the spindle-shaped rolled wire mesh structure 1A is mostly just resting on the ground at the initial stage of installation, and there is a risk that it will move downstream if pressure is applied downstream from water flow, rocks, etc. be. Since the direction in which the pressure is applied to the spindle-shaped rolled wire mesh structure 1A is not constant, when both ends of the spindle-shaped rolled wire mesh structure 1A are directly fixed to the anchor pile 72, the spindle shape curves toward the downstream side. The direction of the rolled wire mesh structure 1A may change to a biased direction, and a large force may be applied to one of the anchor piles 72.

However, the first anchor portions 70 provided at both ends in the longitudinal direction of the spindle-shaped rolled wire mesh structure 1A allow the anchor coil 71 to move in any direction relative to the anchor pile 72. Unbalanced movements applied to both ends of the structure 1A are absorbed to prevent unbalanced forces from being applied to the anchor piles 72 on both the left and right sides.

The three-split spindle-shaped mountainside maintenance material 2A shown in FIG. 6 has, for example, a single spindle-shaped rolled wire mesh structure 1C connected to both ends of a cylindrical rolled wire mesh structure 1B by stitching through a seam 40. When the total length of the 3-split spindle-shaped mountainside preservation material 2A becomes long, or when the 3-split spindle-shaped mountainside preservation material 2A is installed on a steep slope, etc., the 3-split spindle-shaped mountainside preservation material 2A as a whole convexes to the downstream side. Install it in a curved position. In this case, a wire rope (strand) 21 which is a twisted wire and which forms the center axis is inserted into the core coil 20, and the left and right outer ends 21a of the strand 21 extend outward from both ends of the three-split spindle-shaped mountainside maintenance material 2A. , 21b to the second anchor part 80. The strand 21 has a central strand portion 22 that is inserted into the core coil 20 of the cylindrical rolled wire mesh structure 1B, and a left outer end portion that is inserted into the core coil 20 of the spindle-shaped rolled wire mesh structure 1C on the left side. A left strand portion 23 with an end portion 21a and a right strand portion 24 with a right outer end portion 21b at the right end portion inserted into the single spindle type rolled wire mesh structure 1C on the right side are connected. It is structured as follows. The left and right ends 22a of the central strand portion 22, the inner end 23a of the left strand portion 23, and the inner end 24a of the right strand portion 24 are connected by coil-wound connecting portions 25, respectively, to form one strand 21. .

The configuration of the left coil-wound connecting portion 25 that connects the left strand portion 23 and the center strand portion 22 will be described with reference to FIG. 10(c). Note that the connection between the center strand portion 22 and the right strand portion 24 by the coil-wound connecting portion 25 on the right side is the same as that of the coil-wound connecting portion 25 on the left side, so a description thereof will be omitted.

The coil winding connecting part 25 is constructed by winding the inner end 23a of the left strand part 23 multiple times around the winding bolt 25b screwed with the nut 25a loosened, and extending the winding end 23b toward the left strand part 23 to form the left strand. It is attached to the portion 23 and is gripped and fixed by the fixture 25c. Similarly, the left end 22a of the center strand part 22 is wound around the bolt 25b multiple times between the nut 25a and the winding part around which the inner end 23 of the left strand part 23 is wound, and the winding end 22b is wrapped around the bolt 25b. It is extended toward the strand portion 22 side, attached to the central strand portion 22, and held and fixed with a fixture 25.

Then, the nut 25 is tightened, and the winding part 22c formed by the inner end 22a of the center strand part 22 and the winding part 23c formed by the inner end 23a of the left strand part 23 are tightened with the bolt 25b and nut 25a, and both of the windings are tightened. The rotating parts 22c and 23c are prevented from coming off from the wrapping bolt 25b. The right end 22a of the central strand portion 22 and the inner end 24a of the right strand portion 24 are connected in the same manner. Then, a split type strand 21 is obtained in which the three strand portions 22, 23, and 24 are connected into one by the fixture 25.

In this embodiment, the three-split spindle-shaped mountainside maintenance material 2A is constructed by individually installing, for example, a plurality of cylindrical rolled wire mesh structures 1B and a single spindle-shaped rolled wire mesh structure 1C from the viewpoint of transportability to the installation location. Transport to or near a location. At that time, the central strand portion 22 is passed through the core coil 20 of the cylindrical rolled wire mesh structure 1B in advance. The left strand portion 23 and the right strand portion 24 are also passed through the left and right single spindle damming body 1C core coil 20 in advance. Strands, which are twisted wires, need to be treated to prevent the wires from unraveling during cutting, so it is desirable to avoid cutting the strands at installation sites that are narrow and have poor footing. In addition, the process of inserting the strand into the core coil 20 is troublesome, and it is desirable to avoid the process at the installation site. For this reason, a split type strand 21 is used, and each strand portion is connected to each other at the installation site.

Next, the second anchor part 80 for the three-split spindle type mountainside maintenance material 2A shown in FIG. 10(c) will be explained based on FIG. 11(b). In addition, since the left and right second anchor parts 80 have the same structure, the left second anchor part 80 will be described, and the description of the right second anchor part 80 will be omitted.

The second anchor part 80 has an anchor stake 81 inserted into the ground 4 and a retaining cap 82. The retaining cap 82 is open at the lower part, has a through hole 82a formed in the upper ceiling part through which the anchor pile 81 is inserted, and has a window part 82c formed in the outer peripheral wall part 82b. A ring portion 21c is formed in advance at the end portion 21a of the strand 21, and the ring portion 21c is hung on the anchor pile 81. The retaining cap 82 is inserted into the anchor pile 81 with the loop 21c inserted into the inner diameter of the retaining cap 82 through the window 82c of the retaining cap 82, and the loop 21c is hung on the anchor stake 81. Then, by attaching a retaining ring 83 to a through hole 81a provided in the upper part of the anchor pile 81, the retaining cap 82 is prevented from coming off from the anchor pile 81. Further, the loop portion 21c is prevented from slipping out from the anchor pile 81 by the slip-off prevention cap 82.

In particular, since the ring portion 21c is inserted into the inner diameter of the locking cap 82 through the window 82c of the locking cap 82, the ring portion 21c will not slip out from the anchor pile 81 even if the diameter of the ring portion 21c is large. . The ring part 21c is formed by forming a single ring at the end 21a of the strand 21, and fixing the tip 21d of the end 21a to the root end 21a of the ring part 21c using the tightening fixing part 84. It is formed.

According to the second anchor part 80, when attaching the end portion 21a of the strand 21 to the anchor pile 81, there is no need to cut the strand 21, which is a twisted wire.

In addition, in the above-described first to fifth embodiments, the case where the length and weight of the rolled wire mesh structures 1A and 1B are equal to or less than a predetermined value has been described as an example, but the present invention is not limited to this. The single rolled wire mesh structures 1A and 1B may have a long length, for example, exceeding 2 m, or may have a large size, such as an outer diameter exceeding 1 m.

Sixth embodiment

FIG. 12 shows a schematic configuration of a method for transporting mountainside preservation materials according to a sixth embodiment.

The method of transporting the mountainside maintenance materials shown in FIG. For example, they are transported one by one by a drone 120 at 102 . An example of the drone 120 is one that can suspend a load of about 10 kg and has a flight time of about 25 minutes (YOROI6S1200J, manufactured by Cytotec Co., Ltd.).

The personnel involved in transporting the rolled wire mesh structures 1A and 1B, which are the mountainside preservation materials 1, by the drone 120 are the operator 130 who operates the drone 120, and the operator 130 who operates the drone 120, and the personnel who transport the rolled wire mesh structures 1A and 1B, which are the mountainside preservation materials 1, at the collection base 101. A worker 131 hooks a load onto a hook part 122 provided on a hanging wire rope 121 and removes rolled wire mesh structures 1A and 1B transported by a drone 120 from the hook part 122 at a construction site 102 on a mountain 100. An unpacker 132 is assigned to move the package to a predetermined temporary storage area 103.

The accumulation base 101 is set up near a road where the rolled wire mesh structures 1A and 1B can be transported by trucks or the like. A holder 140 is installed at the collection base 101 to hold the rolled wire mesh structures 1A and 1B to be transported by the drone 120 in a vertical position. The holder 140 accommodates a plurality of rolled wire mesh structures 1A and 1B waiting to be transported by the drone 120. A hanging ring 123 is attached to the ends of the rolled wire mesh structures 1A and 1B, and the hook portion 122 is hung on the hanging ring 123. A tag (not shown) on which the identification number of each rolled wire mesh structure 1A, 1B is displayed is attached to the hanging ring 123.

An operator 130, a loading worker 131, and an unpacking worker 132 wear headsets 133 and communicate with each other to transport the rolled wire mesh structures 1A and 1B using the drone 120. The operator 130 operates the transmitter 124 while looking at the photographic screen of the camera 120a mounted on the drone 120, and, for example, displays the rolled wire mesh in a vertically suspended manner with the longitudinal direction of the rolled wire mesh structures 1A and 1B as the vertical direction. The structures 1A and 1B are transported from the collection base 101 to the construction site 102 by the drone 120.

In addition, a weight scale 125 is installed at the bottom of the holder 140 to measure the weight of the rolled wire mesh structures 1A and 1B, and only the rolled wire mesh structures 1A and 1B whose weight is less than a preset weight can be transported by the drone 120. is held in the holder 140. This prevents the overweight rolled wire mesh structures 1A and 1B from being erroneously hung on the drone 120. When transporting a plurality of rolled wire mesh structures 1A, 1B at once using the drone 120, the plurality of rolled wire mesh structures 1A, 1B are tied together and weighed.

In this embodiment, the rolled wire mesh structures 1A and 1B are transported vertically by the drone 120, but the rolled wire mesh structures 1A and 1B may be transported in a horizontal position. Although the rolled wire mesh structures 1A and 1B are transported one by one by the drone 120, multiple rolled wire mesh structures 1A and 1B can be lifted and transported at once if the weight is within the transportable weight of the drone 120. You may also do this.

It is desirable that a plurality of the mountainside maintenance materials 1, 2, 3, and 4 of each of the embodiments described above be installed in the rill, for example, between the downstream side and the upstream side. In particular, because it is lightweight and has limited length, it can be easily moved and installed on narrow mountain roads.

Example 1

The weight of the single spindle-shaped rolled wire mesh structure 1A shown in FIG. 1(a) was determined as follows.

The center diameter (MD) of the spindle-shaped rolled wire mesh structure 1A is 26 cm, the diameter of the core coil 20 is 7 cm, the pitch is 7 cm, which is the same length as the diameter, and the layer thickness T of the space S is 4 cm. The space holding portions 30 are provided at three locations along the longitudinal direction, and the cross coils 31 are of a total length type and include six in total. Therefore, the axial length of the cross coil 31 is 26 cm, which is equal to the center diameter MD of the spindle-shaped rolled wire mesh body 1A. The cross coil 31 has a diameter of 7 cm and a pitch of 4 cm, which is the same as the layer thickness T. The core coil 20 and the cross coil 31 are made of steel wire with a diameter of 2.6 mm, with a weight of 0.042 kg per meter (0.042 kg/m).

Diamond wire mesh weight

The area of the diamond-shaped wire mesh 10 is 1.5×1.5=2.25 m ² where the length W in the column direction (width direction) is 1.5 m and the length L in the row direction is 1.5 m. The wire diameter of the row wires 11 of the diamond-shaped wire mesh 10 was 2.0 mm, the length of the mesh was 56 mm, and the row wires 11 were made of hot-dip galvanized mild steel wire (C-GS3, JIS3542). Since the weight of 1 square meter (m ² ) of this rhombic wire mesh 10 is 0.93 kg, the weight of the rhombic wire mesh 10 is 2.09 kg.

Total length of cross coil 31

The total length of the cross coil 31 is determined. The circumference of a cross coil with a diameter of 7 cm at one pitch is 7π, which is approximately 22 cm. Since the length in the axial direction is 26 cm and the pitch is 4 cm, the number of turns is calculated as 26 cm/4 cm, which is about 7 turns. Since the circumferential length of one pitch is 22 cm, 7 turns will result in 22 cm x 7 = 154 cm. Since the total length of one cross coil 31 is 154 cm, the total length of the cross coil 31 with six cross coils is 6×154=924 cm (9.24 m).

The total length of the core coil 20 is determined.

The core coil 20 has a diameter of 7 cm, a pitch of 7 cm, and a longitudinal length of 150 cm, which is the length of the wire mesh 10 in the row direction. The circumferential length of the core coil 20 at one pitch is 7π, which is about 22 cm, and the number of turns is determined by length in the longitudinal direction (150 cm)/pitch (7 cm), which is about 21 times, but it is wound tightly once at each end. If close winding is performed, there will be a total of 23 windings. Since the circumference of one pitch is 22 cm, the total length with 23 turns is 22 x 23 = 506 cm (5.6 m).

Weight of spindle-shaped rolled wire mesh structure 1A

The total weight of the cross coil 31 and core coil 20 is (9.24 m + 5.06 m) x 0.042 = 0.6 kg. The weight of the diamond-shaped wire mesh 10 is 2.09 kg. Therefore, the weight of the spindle-shaped rolled wire mesh structure 1A is 2.09 kg+0.6 kg=2.69 kg. In addition, the actual value was 2.67 kg.

Example 2

The spindle-shaped rolled wire mesh structure 1A shown in FIG. 1(a) was installed in a narrow, shallow, and dry river, and experiments were conducted to determine its damming effect and drainage effect on soil, fallen leaves, etc. during rainfall.

FIG. 13(a) is a front view of the spindle-shaped rolled wire mesh structure 1A at the installation location during construction, FIG. 13(b) is a front view showing the state after rain after construction, and FIG. 14(a) is FIG. 14(b) is a top view corresponding to FIG. 13(a), and FIG. 14(b) is a top view corresponding to FIG.

As shown in Figures 13 and 14, fallen leaves were piled up on the dry riverbed. Fallen leaves were floated by the water that began to flow due to the rain and adhered to the surface of the wire mesh of the spindle-shaped rolled wire mesh structure 1A, and began to dam the flow of the river. Water was stored in the pit on the side of the curved recess (on the upstream side of the river) of the spindle-shaped rolled wire mesh structure 1A, and the water was full and overflowing. However, some of the water is drained through the wire mesh of the spindle-shaped rolled wire mesh structure 1A.

From this, it was demonstrated that the flow velocity of water flowing through a river whose water depth has suddenly increased due to rainfall is slowed down by the spindle-shaped rolled wire mesh structure 1A, and flows downstream in a gentle flow. In addition, since the spindle-shaped rolled wire mesh structure 1A is installed along the river from the upstream side to the downstream side, the flow speed of the water flowing in the river is gradually slowed down, and it is a deterrent against rapid water flowing downstream like a flash flood. This was an example of verifying effectiveness.

In addition, after the rain stopped, all of the water accumulated on the pit side was drained through the wire mesh of the spindle-shaped rolled wire mesh structure 1A, but the earth and sand did not flow away and accumulated, and fallen leaves were pressed to the surface of the wire mesh. It was stratified. This proves that river bed erosion can be prevented. Unlike valley stoppers, which have a soil-stopping effect, they have the characteristic of being a material that focuses on running water.

1, 2, 3, 4 Mountainside maintenance materials 1A Spindle type rolled wire mesh structure 1B Cylindrical rolled wire mesh structure 1C Single spindle type rolled wire mesh structure 2A 3-split spindle type mountainside maintenance material 2B 3-split cylindrical type mountainside maintenance material Materials 3A, 3B, 3C Pyramid-shaped mountainside preservation materials 4A, 4B Trapezoidal-shaped mountainside preservation materials 10 Diamond-shaped wire mesh 20 Core coil 21 Strand 30 Space retaining portion 31 Cross coil 40 Sewing portion 50 Rolled wire mesh structure body 60 Binding portion 61 to 63 Binding Coils 41, 42 Suture coil 70 First anchor part 71 Anchor coil 72, 81 Anchor pile 80 Second anchor part 82 Removal prevention cap 100 Mountain 101 Accumulation base 102 Construction site 120 Drone T Layer thickness S Space O Winding center

Claims (2)

Mountainside preservation materials placed on a mountainside,
A roll that is formed into a roll shape by winding up multiple layers of wire mesh in a spiral cross-section, with spaces formed in each of the multiple layers, and a core coil having coil-shaped spring properties arranged at the center of the winding along the longitudinal direction. a wire mesh structure body;
space holding portions that are arranged at a plurality of locations along the longitudinal direction of the rolled wire mesh structure body and hold the spaces of the plurality of layers in the radial direction;
A mountainside preservation material consisting of a rolled wire mesh structure. In the mountainside preservation material according to claim 1,
The mountainside preservation material is characterized in that the space retaining portion is constituted by a cross coil having spring properties formed in a coil shape along a direction perpendicular to the longitudinal direction of the rolled wire mesh structure body. .

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