JP2002180472A - Construction method and device for stabilizing slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize a slope. SOLUTION: A plurality of anchors 20 are arranged lengthwise and crosswise and installed in spaced apart relation over the entire area of the slope to be stabilized. The lower portion of the anchor 20 reaches stable ground G3 beneath the topsoil layer G2 of the slope, with the upper end of the anchor protruding beyond the surface G1 of the slope. A blade device 10 with bearing plates is mounted on top of the anchor 20. The blade device 10 includes a plurality of radially extending blades 13a to 13d and the bearing plates 11 fixed to the upper ends of the bearing plates. The blade device 10 is buried into the ground with the bearing plates 11 in contact with the surface G1 of the slope and the upper end of the anchor 20 protrudes above the blade device 10. A stopper 15 is provided at the protruding upper end. The bearing plates 11 of adjacent blade devices 10 are interconnected by main ropes 4 and 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope stabilization method and a slope stabilization device.

[0002]

2. Description of the Related Art In order to prevent unstable surface sediment runoff (collapse) on slopes, particularly, surface soil on steep slopes due to natural phenomena such as rain, wind, and earthquake, and to prevent collapse. Conventionally, various slope stabilization methods have been adopted or tried. A typical example is a method in which a plurality of anchors are installed at appropriate intervals on a slope to be stabilized, and a bearing member is attached to a portion of the anchor protruding from the slope surface. In this method, the surface of the ground is pressed by a supporting member.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a slope stabilization method capable of preventing outflow of surface soil more reliably than a method of simply pressing the ground surface with a supporting member.

The present invention also provides a method for stabilizing a slope over a wide range.

[0005] The present invention further provides a slope stabilizing device (or a slope stabilizing facility or a slope stabilizing structure) obtained by the above-described slope stabilization method.

In the slope stabilization method according to the present invention, a blade device with a supporting plate in which a plurality of blades are radially mounted on a cylindrical body having a thickness into which the upper end of the anchor can be inserted, and a supporting plate is fixed to the upper end of the blade. The anchor is installed so that its lower part reaches the stable ground (for example, rock) under the slope topsoil (the anchor is installed almost perpendicular to the slope surface), and the upper part of the anchor is placed on the slope surface ( Slightly protruding from the slope surface), the upper part of the anchor protruding from the ground is inserted into the cylinder of the blade device with the support plate, and the blade device with the support plate is moved until the support plate contacts the ground surface. The blade device with a support plate is driven into the ground along the anchor, and the upper end of the anchor protruding from the cylinder of the blade device with the support plate is retained.

In a place where a stable ground such as a bedrock is covered with a topsoil layer and the surface (surface) of the topsoil layer is inclined, a part or all of a topsoil layer (also called a surface portion, a surface soil layer, a conglomerate, etc.) The slope stabilization method is a method for preventing the outflow of water. The anchor is at the bottom (tip)
Is fixed on the stable ground. A blade device with a pressure plate is mounted on the anchor in the topsoil layer on the slope. This blade device with a pressure plate has a plurality of blades, and a pressure plate is fixed to the upper end of the blade vertically to the blade. The earth pressure of the topsoil or earth and sand to be drained is received by the blades. This earth pressure acts in the direction of lifting the blades, but this force is held down by the support plate. That is, the plurality of blades and the supporting plate cooperate to prevent the outflow or collapse of the topsoil layer.

Anchors include those called by various names, such as anchor rods, lock bolts, rods, etc., and include all rod-shaped anchors used as anchors, irrespective of circular or polygonal cross section. The anchor is preferably solid.

In this slope stabilization method, a blade device with a supporting plate separate from the anchor is used. In this blade device with a pressure plate, a cylindrical body having a thickness into which the upper end of the anchor can be inserted (that is, the upper end of the anchor can be inserted into a hole (hole) of the cylindrical body).
It has. After installing the anchor, insert the upper end of the anchor protruding from the slope surface into the cylinder of the impeller device with the support plate, and drive the impeller device with the support plate until the blade is buried in the topsoil layer. . Thereby, the blade device with the support plate is mounted on the anchor. The bearing plate touches the surface of the topsoil layer (ground surface). The upper end of the anchor only needs to be long enough to prevent the blade device with a pressure plate from coming off and project from the topsoil surface. That is, the upper end of the anchor only needs to slightly project from the surface of the topsoil layer.

[0010] The retaining of the blade device with the supporting plate can be performed by various methods. Most simply, a male screw is formed at the upper end of the anchor, and a nut may be screwed onto the male screw.

Since the blade device with the supporting plate is separate from the anchor, it is easy to carry them to the site. Further, as described above, the blade device with the support plate can be driven after the anchor is fixed, and the installation work is relatively easy.
Blade systems with a pressure plate are generally made of steel, iron, reinforced plastics and other strong materials.

However, it is also possible to use an anchor integrally provided with a plurality of blades and a pressure plate.

In the slope stabilizer (equipment, structure, structure) according to the present invention, an anchor is installed on the slope (substantially perpendicular to the slope surface). The lower part of the anchor installed on the slope reaches the stable ground under the slope top soil layer, and the upper end protrudes beyond the slope surface. A blade device with a support plate is mounted on the upper part of the anchor.
This blade device with a pressure plate has a plurality of blades extending radially and a pressure plate fixed to the upper ends of these blades. A blade device with a pressure plate is embedded in the ground so that the pressure plate contacts the slope surface, and the upper end of the anchor projects above the blade device with the pressure plate, and a retaining member ( For example, the above-mentioned nut) is attached.

Here, as described above, it is preferable that the impeller-equipped blade device is separate from the anchor. The blade device with a pressure plate is composed of a cylinder with a thickness that allows the upper part of the anchor to be inserted, a plurality of blades radially attached to this cylinder, and a pressure plate fixed to the upper end of the blade. .
However, the above-mentioned wing device with a supporting plate may be integrated with the above-mentioned anchor, and in this case, the wing device with a supporting plate is provided with a plurality of blades radially fixed to the anchor and an upper end portion of the wing ( And a supporting plate fixed vertically (perpendicularly).

[0015] Preferably, a plurality of anchors are installed at intervals (preferably at substantially equal intervals), and a blade device with a supporting plate is attached to each anchor. The slope can be stabilized at a plurality of locations where the anchors are installed.

[0016] More preferably, the supporting plates of the adjacent blade devices with a supporting plate attached to the plurality of anchors are connected by a rope.

The rope is a concept including a wire, a wire rope, a chain, and the like, and most commonly, a steel stranded wire is used.

Since the pressure plates of the blade device with a plurality of pressure plates are connected to each other by ropes, the pressure plates reinforce each other and cooperate to prevent the outflow of the topsoil layer. Is stabilized.

The plurality of anchors may be arranged in a line. In order to stabilize the slope over a wider area, it is desirable to arrange a plurality of anchors vertically, horizontally or diagonally at intervals over the entire area of the slope to be stabilized (in other words, two-dimensionally). Or with a flat plate), each anchor is equipped with a wing device with a supporting plate, and the supporting plates of the adjacent wing device with a supporting plate are connected by ropes stretched vertically, horizontally or diagonally.

The blade device with a pressure plate preferably has three or more blades, and more preferably has four blades. By using such a blade device with a supporting plate,
When the rope is stretched vertically, horizontally or diagonally,
It can pass through approximately the center of the angle between adjacent blades. The blade can sufficiently receive the tension of the rope. In other words, the blade device with the support plate is positioned (arranged) so that the direction in which the rope is to be stretched is located between the adjacent blades, and the blade device with the support plate is embedded.

If a turnbuckle is connected to the rope, the rope can be strongly tensioned.

If the crossing portions of the ropes that are stretched vertically, horizontally or diagonally are tied by a binding metal, the connecting force between the ropes is increased and the slope stabilizing effect is increased. Here, the crossing portion of the rope includes not only a portion where the rope crosses a cross but also a portion where the rope crosses a T shape.

More preferably, the net is attached to a rope which is stretched vertically, horizontally or diagonally. This can be done either by first attaching the rope and then attaching the net to the rope, or by first placing the net on a slope, then vertically,
The procedure includes a procedure in which a rope is stretched sideways or diagonally and a net is attached to the rope. The net includes a wire net, a thick net, an expanded metal, a fiber net, and the like. These nets may be fixed to the topsoil layer at appropriate locations by pin anchors or the like.

By setting up a net, falling rocks can be prevented. Furthermore, the slope can be greened by spraying a thick base material (custom soil) and spraying seeds.

The present invention further provides the above-mentioned blade device with a supporting plate. The blade device with a supporting plate is separate from the anchor, and has a cylindrical body into which the upper part of the anchor can be inserted, a plurality of blades radially mounted on the cylindrical body, and an upper end of the blade. (Fixed vertically to the blades).

The supporting plate is preferably large enough to cover the upper ends of all the blades. The support plate shape can be circular, square, hexagonal, or any other shape. The impeller device with support plate is made of steel, iron, reinforced plastic and other strong materials.

The present invention further provides an integrated type of an anchor and a blade device with a support plate (this is called an anchor device). In this anchor device, a plurality of blades are radially mounted on an upper portion of the anchor, and a support plate is fixed on the upper portion of the blade (perpendicular to the blades).

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show the entirety of a slope stabilization device (slope stabilization equipment, slope stabilization structure, slope stabilization structure) 1 installed by a slope stabilization method. FIG. 1 is a front view of a slope on which a slope stabilizer 1 is installed, and FIG. 2 is a sectional view.

A plurality (many) of anchors 20 are installed at substantially equal intervals in the vertical and horizontal directions over the entire slope to be stabilized. Although the anchors 20 are depicted as being regularly arranged in FIG. 1, it is natural that the anchors 20 are actually installed in a position that is determined according to the situation at the site. The lower part (tip) of the anchor 20 has a stable ground (rock) G ₃ under the slope surface soil layer G _2.
It is fixed so as to reach, and the upper portion of the anchor 20 is slightly protrudes from the slope surface G _1. In the lower half of the anchor 20, a coagulant 22 such as mortar, cement or the like is used.
(See FIG. 4). At the top of the anchor 20 is attached in a state where pressure bearing fitted with blade unit 10 is embedded within the surface soil layer G _2. The blade devices 10 with supporting plates adjacent in the vertical and horizontal directions are connected to each other by main ropes (wires) 4 and 5 stretched in the vertical and horizontal directions. Also,
Auxiliary ropes 6 and 7 are stretched between the main ropes 4 and 5, and are connected or fixed to the main ropes 4 and 5 by clips 41 (or cross clips 40; fasteners, connectors). If some or rock rock G ₃ is Expose the surface soil layer G ₂ is, for dropping or falling rock prevention of rock, if necessary, the main rope 4 and 5, the net 60 to the auxiliary rope 6 ( 3) is attached.

FIGS. 3 and 4 are enlarged views of a part of the slope stabilizer 1 shown in FIGS. 1 and 2, respectively. In FIG. 4, the slope is drawn horizontally for the sake of clarity (the same applies to FIG. 6). FIGS. 5 and 6 are enlarged views of the blade device 10 with the pressure plate mounted on the upper part of the anchor 20 and its periphery, and FIG. 7 is an enlarged view of the blade device 10 with the pressure plate. .

The blade device 10 with a supporting plate comprises a circular supporting plate 11, a cylindrical body 12, and four blades 13a to 13d.
The inner diameter of the cylindrical body 12 is large enough to allow the upper part of the anchor (anchor bolt) 20 to be loosely inserted. Four blades 13a to 13d are fixed (fixed) radially at equal angular intervals (90 ° intervals) (not necessarily equal angular intervals) to the cylindrical body 12.
At the upper ends of the blades 13a to 13d, a support plate 11 is fixed perpendicular to the blades 13a to 13d. Upper end of the cylindrical body 12 (projection 12
a) penetrates the support plate 11 and slightly protrudes upward. Blade 13a~13d, as implanted easily in the surface soil layer G _2, are inclined upwardly in accordance with the lower edge thereof moves away from the cylindrical body 12. The blade device 10 with a supporting plate is made of iron, steel, reinforced plastic, or other strong materials.

At both ends of the vertical and horizontal main ropes 4, 5, loops (eyes) are formed (ice price method), and the bases of the loops are crimped by sleeves 9. At one end of the main ropes 4 and 5, a shackle 36 is connected to the loop, and the shackle (connecting tool) 36 is connected to the periphery of the supporting plate 11 of the blade device 10 with the supporting plate by bolts and nuts. The other ends of the main ropes 4 and 5 are connected to a turnbuckle 37. That is, a turnbuckle (fastening tool) 37 having a shackle (connecting tool) 35 at both ends is used, and the other end of the main ropes 4, 5 is connected to one shackle 35 of the turnbuckle 37 with bolts and nuts. ing. The other shackle 35 of the turnbuckle 37 is connected to the periphery of the support plate 11 by bolts and nuts. In this way, the main ropes 4 and 5 connect the supporting plates 11 of the blade device 10 with the supporting plate that are vertically and horizontally adjacent to each other, and are tightened using the turnbuckle 37. In addition,
The connection between the shackles 35 and 36 and the support plate 11 or the main ropes 4 and 5 may be replaced by screws other than bolts and nuts.

Both ends of the auxiliary ropes 6 and 7 are connected to the outermost main ropes 5 and 4 by winding grips (T-shaped connection), and the connecting portions are further fastened by clips 41. The portions where the auxiliary ropes 6 and 7 cross each other, the portion where the auxiliary rope 6 and the main rope 5 cross each other, and the portion where the auxiliary rope 7 and the main rope 4 cross each other are fastened by a cross clip 40. The auxiliary ropes 6 and 7 may not be necessarily provided, but by providing the auxiliary ropes 6 and 7, more stable slope stabilization can be achieved.

A plurality of auxiliary ropes may be stretched between the main ropes 4 and 5. If necessary, the net 60 is attached to the main ropes 4, 5, the auxiliary ropes 6, 7 by the coupling coil 62. As the net 60, a wire net, a thick net, an expanded metal, a fiber net, or the like can be used. It may be fixed by a pin anchor 61 that implanted net 60 in the surface soil layer G _2.

The direction in which the main ropes 4 or 5 are stretched is the blade adjacent to the blade device 10 with the supporting plate (two of 13a to 13d).
The angle is preferably a direction that halves the angle formed by the two.

Next, a slope stabilization method for installing such a blade device 10 with a support plate will be described.

A plurality of anchors 20 are installed at appropriate intervals (substantially evenly) over the area where the slope is to be stabilized. As a method of installing the anchor, a generally known method can be adopted. For example, the anchor 20 is simply driven into a slope. Alternatively, an excavation hole is formed on the slope, an anchor 20 is inserted into the excavation hole, and a coagulant 22 such as mortar or cement is poured. When a pipe anchor having a hole at the tip is used, a coagulant 22 may be injected into the pipe anchor. The drill rod used for drilling can be embedded as it is in the ground (by injecting a coagulant if necessary) and used as an anchor. In this case the anchor 20 passes through the overburden layer G _2, the leading end to reach the rock (stable ground) G _3. Also, keep the upper end of the anchor 20 is protruded than the slope surface G _1.

If necessary, after fixing the anchor 20,
Perform a pull-out test to confirm the fixing strength.

Next, a support plate is provided above the installed anchor 20.
The bladed device 10 has a supporting plate 11 whose slope surface G₁ Touch
Topsoil layer G until it is in a state_Two Buried or driven into. Topsoil
Layer G _Two And anchor the tubular body 12 of the blade device 10 with support plate
Fit the upper end of 20 and cover its wings 13a-13d with earth and sand
It may be filled, but preferably the next driving method
Is used.

As shown in FIG. 8, so as to put the upper end of the anchor 20 projecting on the surface soil layer G ₂ in the lower part of the cylindrical body 12 of Bearing fitted with blade unit 10, topsoil bearing capacity fitted with blades 10 Place on layer G ₂ (slope surface G ₁ ). The ring-shaped washer 58 is fitted into the protruding portion 12a of the cylindrical body 12 of the blade device 10 with the support plate. Further, a jig 55 prepared in advance is used (the jig 55 is formed with holes 56 and 57 from the upper end and the lower end of the round bar, respectively), and the projecting portion 12a of the cylinder 12 is inserted into the lower hole 57 of the jig 55. And the jig 55 is fitted to the protruding portion 12a. The lower end of the jig 55 rides on the ring-shaped washer 58. Further, the striking rod 51 of the driving machine (concrete breaker) 50 is fitted into the upper hole 56 of the jig 55. Then, the driving machine is driven to give a striking force to the blade device 10 with the supporting plate via the jig 55 (in general, an operator operates and works with the driving machine). Bearing fitted with blade unit 10 will be driven into the surface soil layer G ₂ (go sunk). Driving operation of Bearing fitted with blade unit 10, the blade 13a~13d of Bearing fitted with blade unit 10 enters completely into the topsoil layer G _2, continued until Bearing plate 11 abuts against the surface soil layer surface G _1. Blade 13a~13d of Bearing fitted with blade unit 10 enters completely into the topsoil layer G _2, Bearing plate 11 topsoil layer surface G ₁
Then, the driving machine 50, the jig 55, and the ring-shaped washer 58 are removed.

Before applying a striking force to the blade device 10 with a pressure plate by the driving machine 50, the blades 13 a to 13 of the blade device 10 with a pressure plate are applied.
The direction of d is determined in consideration of the direction in which the ropes 4, 5 fixed to the support plate 11 of the blade device 10 with the support plate are stretched. That is, the blades (for example, the blade 13a and the blade 13b) whose directions of tension (tension or tension direction) by the main ropes 4 and 5 are adjacent to each other.
The positions (angles) of the blades 13a to 13d are determined so as to be at the center of the blades (so that the angle formed by the blades 13a and 13b is bisected in the extending direction).

When the blade device 10 with the support plate is driven into the topsoil layer G ₂ and mounted on the anchor 20, the upper end of the anchor 20 protrudes above the protrusion 12 a of the cylindrical body 12. A male screw is formed at the upper end of the anchor 20.
It has a hole for accommodating the protrusion 12a and the protrusion
A washer member 16 thicker than the length of 12a is fitted into the protruding portion 12a. A nut (stopper) 15 is screwed and fixed to the upper end of the anchor 20 (see FIG. 9). This prevents the blade device 10 with the support plate from coming off the anchor 20 upward.

Further, the ends of the main ropes 4 and 5 are connected to the support plate 11 of the blade device 10 with the support plate via shackles 35 and 36 and the turnbuckle 37, and the adjacent blade device 10 with the support plate is connected.
The main ropes 4 and 5 are strongly stretched between the support plates 11. If necessary,
Reinforcing ropes 6, 7 are stretched in the vertical and horizontal directions by a cross clip 40 or the like at an intermediate position between the main ropes 4, 5.

If necessary, a net 60 is attached to the main ropes 4, 5, and the auxiliary ropes 6, 7, which are stretched vertically and horizontally, by a coupling coil 62 for preventing rocks from falling and falling rocks. The net 60 is placed over the entire slope to be stabilized, and the main ropes 4, 5, and auxiliary ropes 6, 7 are stretched over it.
Coupling coil 60 to main ropes 4, 5, auxiliary ropes 6, 7
May be attached. These nets 60 may employ any of a wire net, a thick net, expanded metal, and a fiber net. Pin anchors at appropriate places on net 60
It may be fixed to the surface soil layer G ₂ by like 61.

The blade device 10 with a supporting plate is provided with a plurality of blades 13a to 13a.
The supporting plate 11 is fixed to the upper ends of the blades 13a to 13d and perpendicular to the blades 13a to 13d. The earth pressure of the earth or sand to be discharged is received by the blades 13a to 13d. This earth pressure acts in the direction of lifting the blades 13a to 13d, but this force is pressed by the support plate 11. That is, the plurality of blades 13a to 13d and the supporting plate 11 cooperate to form the topsoil layer G.
Prevent the spill or collapse of ₂ . In addition, a plurality of anchors 20 are installed at substantially equal intervals, and the blade device 10 with a supporting plate is attached to each anchor 20, so that the slope can be stabilized at a plurality of locations. Further, a plurality of blade devices with supporting plates 10
Since the supporting plates 11 are connected to each other by the ropes 4 and 5, the supporting plates 11 reinforce each other and cooperate to prevent the outflow of the topsoil layer, thereby further stabilizing the slope. be able to.

The blades 13a to 13d are so arranged that a load by the main ropes 4 and 5 is applied substantially at the center of the angle formed by the blades 13a to 13d.
Direction is determined. The number of blades may be determined in consideration of the topsoil layer G ₂ (ground) (underground), the loads on the main ropes 4 and 5, the directions of the main ropes 4 and 5, the size of the blades, and the like. In the above embodiment is fixed at the bottom of the anchor 20 to rock G _3, but not necessarily rock, may be a stable ground lower end of the anchor 20 can be firmly fixed.

The ropes 4 to 7, the cross clips 40 and 41, the binding metal, and the like are coated with phosphoric acid. As a result, these ropes, clips, and the like have a dark color close to the color of the bedrock and become inconspicuous, so that the natural landscape is not damaged or reduced.

Further, the slope can be greened by spraying a thick base material (customer's soil) and spraying seeds.

FIG. 10 shows another embodiment of the retaining structure of the blade device 10 with the supporting plate. A washer 16A is fitted into the upper end of the anchor 20, and is located at the upper end of the cylindrical body 12a of the blade device 10 with the support plate. Nut on the male screw at the upper end of anchor 20
15 is screwed.

FIG. 11 shows another embodiment of the blade device with a supporting plate. The retaining structure of the blade device 10B with support plate is shown in FIG.
It is shown at 12. In this blade device with supporting plate 10B, a cylindrical body is used.
The upper end of 12B does not protrude from the support plate 11B, and is flush with the support plate 11B. Bearing fitted with vanes device 10B having such a structure is attached to the anchor 20 by digging topsoil layer G _2, are covered with topsoil. The blade device with support plate 10B is a washer 16B
Nut 15 screwed into the upper end of anchor 20 via
Is stopped by.

FIG. 13 shows an example in which the anchor and the blade device with a supporting plate are integrated. A plurality of blades 13D are radially fixed to an upper end of the anchor 20D, and a support plate 11D is fixed to an upper end of the blade 13D perpendicular to the blades 13D. Such an anchor device can also be used.

In the case where it is effective to provide the anchor 20 only at one position on the slope, it is sufficient to install one anchor 20 on the slope and attach the blade device 10 with a pressure plate to the anchor 20. A plurality of anchors 20 may be arranged in a line. Instead of arranging the plurality of anchors 20 vertically and horizontally, they may be arranged diagonally.

[Brief description of the drawings]

FIG. 1 is a top view showing the entire slope stabilizer.

FIG. 2 is a cross-sectional view of a slope on which a slope stabilizer is installed.

FIG. 3 is an enlarged plan view of a part of the slope stabilizer.

FIG. 4 is an enlarged sectional view of a part of the slope stabilizer.

FIG. 5 is a plan view showing a part of the slope stabilizing device in a further enlarged manner.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII in FIG.

FIG. 8 shows a state in which the blade device with a supporting plate is driven into a topsoil layer.

FIG. 9 is an enlarged sectional view showing a retaining structure of a blade device with a support plate attached to an anchor.

FIG. 10 is an enlarged sectional view showing another example of the retaining structure of the blade device with a support plate attached to the anchor.

FIG. 11 is a longitudinal sectional view showing another embodiment of a blade device with a support plate.

FIG. 12 is an enlarged sectional view showing a retaining structure of a blade device with a support plate attached to an anchor.

FIG. 13 is a cross-sectional view corresponding to FIG. 7 showing an anchor device in which a blade device with a supporting plate is integrated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slope stabilizer 4, 5 Main rope 10, 10B Blade device with support plate 11, 11B, 11D Support plate 12, 12B Cylindrical body 13a, 13b, 13c, 13d, 13D Blade 20 Anchor 37 Turnbuckle 60 Net

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Takahiro Okayama 2-5-9, Minamihonmachi, Chuo-ku, Osaka-shi Tokyo Seimitsu Co., Ltd. Osaka branch F-term (reference) 2D041 GA01 GC12 GD01 2D044 DB02 DB51 EA01

Claims (19)

[Claims] A blade device with a pressure plate is provided in which a plurality of blades are radially attached to a cylinder having a thickness into which an upper end of an anchor can be inserted, and a pressure plate is fixed to an upper end of the blade. Is installed so that the lower part thereof reaches the stable ground under the slope top soil layer, and the upper part of the anchor is made to protrude beyond the slope surface, and the anchor protrudes to the surface of the cylinder of the impeller device with a pressure plate. And inserting the blade device with the support plate into the ground along the anchor until the support plate comes into contact with the surface of the ground, and mounting the blade device with the support plate on the anchor. A slope stabilization method in which the upper end of the anchor protruding from the cylinder of the bladed device is prevented from falling off. 2. A method according to claim 1, wherein a plurality of said anchors are installed at intervals, said blade device with a pressure plate is mounted on each anchor, and said pressure plates of adjacent blade devices with a pressure plate are connected by a rope. Item 4. The slope stabilization method according to Item 1. 3. A plurality of said anchors are arranged vertically, horizontally or diagonally at intervals over the entire area of the slope to be stabilized, and said anchors are provided with said supporting plate-equipped blade device. Connecting the supporting plates of adjacent blade units with the supporting plate with ropes stretched vertically, horizontally or diagonally;
The slope stabilization method according to claim 1. 4. The slope stabilization method according to claim 3, wherein a net is attached to the rope which is stretched vertically, horizontally or diagonally. 5. The blade with a support plate having three or more blades, wherein the rope is stretched so as to pass through substantially the center of the angle between adjacent blades.
The slope stabilization method according to any one of the above. 6. The slope stabilizing method according to claim 2, wherein a turnbuckle is connected to the rope to tension the rope. 7. The slope stabilizing method according to claim 2, wherein the crossing portions of the ropes are tied by a binding metal. 8. An anchor installed on a slope has a lower part reaching the stable ground under the slope top soil layer and an upper end protruding from the slope surface, and a blade device with a pressure plate is provided above the anchor. The blade device with a pressure plate is provided with a plurality of blades extending radially, and a pressure plate fixed to the upper ends of the blades, and the pressure plate is provided so that the pressure plate contacts the slope surface. A slope stabilizing device in which a blade device is embedded in the ground, the upper end of the anchor protrudes above the blade device with a pressure plate, and a stopper is attached to the protruding upper end. 9. A plurality of the anchors are installed at intervals, and the blade device with a pressure plate is attached to each anchor, and the pressure plates of adjacent blade devices with the pressure plate are connected by a rope. The slope stabilizer according to claim 8, wherein 10. A plurality of said anchors are vertically, horizontally or diagonally arranged at intervals over the entire area of a slope to be stabilized, and said anchors are provided with said supporting plate-equipped blade device. The slope stabilizing device according to claim 8 or 9, wherein the supporting plates of the adjacent blade devices with the supporting plate are connected by ropes stretched vertically, horizontally or obliquely. 11. The slope stabilizer according to claim 10, wherein a net is attached to the rope which is stretched vertically, horizontally or diagonally. 12. The blade device with a pressure plate has three or more blades, and the rope is stretched so as to pass through substantially the center of the angle between adjacent blades. The slope stabilizer according to claim 1. 13. The slope stabilizer according to claim 9, wherein the rope is stretched via a turnbuckle. 14. The slope stabilizing device according to claim 9, wherein the cross portions of the ropes are tied by a binding metal. 15. The blade device with a pressure plate is separate from the anchor, and the blade device with a pressure plate is
A cylindrical member having a thickness into which an upper portion of the anchor can be inserted, a plurality of blades radially attached to the cylindrical member, and the supporting plate fixed to an upper end of the blade. Item 15. The slope stabilizer according to any one of Items 8 to 14. 16. The apparatus according to claim 8, wherein the blade device with a pressure plate is integral with the anchor, and a plurality of the blades are radially fixed to the anchor. Slope stabilizer. 17. A blade device separate from an anchor, comprising: a cylindrical member having a thickness into which an upper portion of the anchor can be inserted; a plurality of blades radially attached to the cylindrical member; A blade device with a pressure plate comprising a fixed pressure plate. 18. The blade device with a pressure plate according to claim 17, wherein the pressure plate is sized to cover an upper end of the blade. 19. An anchor device in which a plurality of blades are radially attached to an upper portion of an anchor, and a supporting plate is fixed to an upper end of the blade.