JP2003147774A - Anchor bearing plate and slope stabilizing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor bearing plate and a slope stabilizing method capable of wholly filling up a slope with a vegetation base material and plants reared there. SOLUTION: This anchor bearing plate 1 fixes a head part of an anchor 2 driven in the slope 8, and is characterized by being formed as a skeleton structure by combining a curvedly worked member in a dome shape. The anchor bearing plate can also be formed by combining the curvedly worked member so that an external shape becomes a cross shape. This anchor bearing plate allows seeding and planting for the whole slope since the vegetation base material can be arranged inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor pressure plate for fixing the head of an anchor to be mounted on a slope and a slope stabilizing method using the same.

[0002]

2. Description of the Related Art A slope stabilizing method for stabilizing a slope by driving an anchor on the slope has been conventionally practiced. Anchor type that introduces tension,
There is a type that expects the tensile resistance and shear resistance of the anchor material just by fixing it to the slope. Both types of anchor require a bearing plate to transmit the anchor force to the slope. There are two types of bearing plates, one is a continuous type like a legal frame and the other is an independent type installed for each anchor. Also, depending on the manufacturing method, it is possible to distinguish between a cast-in-place type and a precast type. Furthermore, the independent type bearing plate is a cross type in the precast type,
As the square type and the cast-in-place type, the cross type, the square type, and the I type have been conventionally used.

[0003]

The above-mentioned conventional anchor bearing plate and slope stabilizing method have the following problems. <A> Most of the precast independent type pressure bearing plates that have been conventionally used are made of concrete. Therefore, it is very heavy and not easy to handle. Further, even when concrete or mortar is poured on site, it takes time to assemble the formwork, install the precast formwork, and to put concrete or the like. In particular, it takes time and effort to excavate the topsoil at the place where the pressure bearing plate is installed and level the soil. <B> The place where the bearing plate is installed cannot be greened. For this reason, the artificial bearing plate remains on the slope even after the greening work, and it cannot be integrated with the surrounding landscape. <C> Even if the surface of the anchor bearing plate is covered with vegetation base material, etc., the surface of the bearing plate will also have a thin cover soil and may be washed away by rainfall.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an anchor bearing plate and a slope stabilizing method capable of filling the slope with a vegetation base material or a plant growing there. The purpose is to provide. In particular, it is an object of the present invention to provide an anchor pressure support plate and a slope stabilizing method in which a vegetation base material can be arranged inside the anchor pressure support plate. Another object of the present invention is to provide an anchor bearing plate and a slope stabilizing method that are lightweight and can be easily installed. In particular, it is an object of the present invention to provide an anchor bearing plate and a slope stabilizing method that can be efficiently installed with less installation procedure. The present invention achieves at least one of these objectives.

[0005]

In order to achieve the above-mentioned object, the anchor pressure-bearing plate of the present invention is an anchor pressure-bearing plate for fixing the head of an anchor to be mounted on a slope, It is characterized in that a skeleton structure is formed by combining members processed into a shape into a dome shape. In addition,
It is preferable to dispose a shape retaining member on the anchor pressure-bearing plate so that the shape of the pressure-bearing plate can be maintained even after the anchor force is introduced. Further, the anchor bearing plate may be composed of an upper frame structure and a lower frame so that the lower frame can play the role of the shape retaining material.

Further, the anchor pressure plate for fixing the head of the anchor to be mounted on the slope is characterized in that a curved structure is combined so as to have a cross-shaped outer shape, thereby forming a skeleton structure. It is what An anchor bearing plate of any shape can be manufactured by combining semi-circular materials.

In the slope stabilizing method of the present invention, anchors are installed at intervals on the slope, the above-mentioned anchor pressure plate is installed on the head of the anchor, and the head of the anchor is fixed on the anchor pressure plate. It is a method of arranging the vegetation base material on the slope and inside the anchor bearing plate. here,
When the anchor bearing plate is composed of the upper frame structure and the lower frame, the upper frame structure is installed after the lower frame is installed on the slope.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<A> Anchor pressure plate The anchor pressure plate 1 is a member for transmitting an anchor force to the slope 8 and is installed on the head of the anchor 2. At least the upper portion of the anchor bearing plate 1 of the present invention is formed into a frame structure by assembling a long member such as a rod or plate. For example, a steel pipe, a casting material, a steel material such as an angle steel, or the like can be used as the material. It is preferable to install a shape retaining member 7 below the anchor pressure support plate 1 in order to prevent the anchor pressure support plate 1 from being deformed by the anchor force acting on the anchor pressure support plate 1. The shape-retaining material 7 may be a restraining structure for holding the shape of the anchor pressure-bearing plate 1 or a pre-tensioning structure that applies a tensile force in a direction opposite to the deformation direction in advance. The bottom surface of the anchor support plate 1 is not limited to a linear material, and may be a planar material.

<B> Dome Type Pressure Support Plate The dome type pressure support plate 1a is an anchor pressure support plate 1 formed in a dome shape. For example, a hemispherical anchor fixing portion 6a for fixing the head of the anchor 2 is arranged at the apex, and one end of the curved material 11 processed into an arc shape is attached to the anchor fixing portion 6a and arranged radially. The other end of the curving member 11 is connected to the circular lower edge member 12 (see FIGS. 2 and 3). By forming the anchor fixing portion 6a as a hemispherical outer shell, it is possible to prevent the upper end portion of the anchor 2 from protruding from the anchor fixing portion 6a after fixing. A connecting member 13 is appropriately disposed between the lower edge member 12 forming the lower surface of the dome-shaped pressure support plate 1a and the anchor fixing portion 6a for reinforcement. When the shape retaining material 7 is installed, for example, the connecting material 71, the hole forming material 72, and the diagonal material 7
The shape-retaining material 7a composed of 3 and 3 is used. For example, the hole forming material 72 is arranged so as to be concentric with the lower edge material 12,
A plurality of connecting members 71 connect the two circular members. Then, the hole forming member 72 and the anchor fixing portion 6a are connected by the diagonal member 73 (see FIG. 4). By using the dome-shaped pressure support plate 1a as the anchor pressure support plate 1, it is possible to make the structure strong against the anchor pressure support from above.

<C> Cross-shaped pressure bearing plate (FIG. 11) The cross-shaped pressure bearing plate 1b is an anchor pressure bearing plate 1 having a cross-shaped outer shape. A plurality of semicircular semicircular members 15 are arranged at intervals in the cross direction around the anchor fixing portion 6c that fixes the head of the anchor 2. A connecting member 16 is appropriately arranged between the semicircular members 15 to reinforce. Further, it is preferable to connect both ends of the semicircular member 15 with a linear shape-retaining material 7b. Since the cross-shaped pressure bearing plate 1b uses the semicircular semicircular member 15 in the frame, it can have a structure that is strong against the anchor bearing pressure from above. The outer shape of the anchor bearing plate 1 is not limited to the cross shape as long as it is a frame structure in which arch members such as the semicircular member 15 are combined, and can be formed in any shape.

<D> Lower Frame The lower frame 3 is a frame member that forms the bottom of the anchor support plate 1. The lower frame 3 can be considered as a constraining-type shape-retaining material for preventing the anchor support plate 1 from being deformed by the anchor force. In this case, the shape retaining members 7a and 7b as described above need not be installed in the upper arch-shaped or cross-shaped frame structure. Alternatively, both the shape-retaining materials 7a and 7b and the lower frame 3 can be adopted. Various structures can be adopted for the lower frame 3 in order to facilitate installation on the slope and to improve the proof stress. For example, an arch-shaped lower frame 3a whose bottom is formed in an arch shape (see FIG. 5)
Since only the peripheral portion of the arch-shaped lower frame 3a bites into the sloped surface 8, it can be stably installed even on an uneven sloped surface. Since the bottom surface is arched, it also improves the yield strength.
In addition, the mesh-shaped lower frame 3b (see FIG. 6) whose bottom surface is formed in a mesh shape can be well adapted to an uneven slope because the rope material 31 and the wire mesh forming the mesh are flexible materials. . Further, the contact type lower frame 3c (see FIG. 7) whose bottom surface is formed by the annular plate and the flexible sheet is adhered to the slope by filling the filler 32 such as mortar between the annular plate and the flexible sheet. Can be made. Further, it is also possible to use an annular lower frame 3d having an annular plate provided with a plurality of holes 33 (see FIG. 8).

<E> Anchor fixing pipe 6 for fixing the anchor fixing pipe material 2 does not have to be integrally formed with the anchor pressure plate 1 as described above. For example, an anchor fixing pipe material such as a truncated cone-shaped anchor pipe 61 can be used (see FIG. 8). The anchor pipe 61 includes an anchor fixing portion 6b for fixing the anchor therein. By disposing the anchor fixing portion 6b inside, it is possible to prevent the upper end portion of the anchor 2 from protruding from the anchor pipe 61 after fixing.

<F> Anchor The anchor 2 is mounted on the slope 8 in order to stabilize the slope 8. As the anchor 2, both a type that introduces a tension force and a type that is expected to have a tensile resistance force and a shear resistance force of the anchor material only by fixing it to a slope can be used. In the anchor 2 that introduces tension, the anchor body is fixed in the ground, and the anchor 2 is tensioned at the head.
For the tensile member that constitutes the anchor 2, a stranded wire of PC steel, P
A C steel rod or the like can be used. As the other anchor 2, a type in which a tension member is fixed in the ground and the head of the anchor is fixed to the anchor support plate 1 can be used. In this type of anchor 2, a lock bolt, a reinforcing bar, etc. are used as a tension member.

The slope stabilizing method of the present invention will be described below with reference to the drawings.

<A> Placing the anchors The anchors 2 are placed on the inclined surface 8 at a predetermined interval. The anchor 2 is placed by inserting the anchor 2 into a hole drilled by a drilling machine and injecting a solidifying material such as cement milk. When the anchor 2 is driven by using a self-drilling bolt or the like, drilling and insertion of the anchor can be performed at the same time.

<B> Installation of Anchor Bearing Plate The anchor bearing plate 1 is installed on the head of the anchor 2. When the anchor support plate 1 has a structure having the lower frame 3, the lower frame 3 is installed first (see FIG. 5). When an anchor fixing pipe material such as the anchor pipe 61 is used, the anchor pipe 61 and the anchor bearing plate 1 are installed in this order after the lower frame 3 is installed (see FIG. 8). The anchor fixing pipe material may be attached to the lower frame 3 or the anchor pressure support plate 1 in advance. FIG. 9 is a side view showing a state in which the anchor pipe 61 is installed on the dome-shaped pressure support plate 1a. The head of the anchor 2 is fixed to the anchor fixing portion 6. When the anchor 2 is to be tensioned, a jack is installed on the head of the anchor and the jack is operated to perform tension / fixation. When the anchor 2 is not tensioned, a fixing tool 21 such as a nut is attached to the anchor head to fix the anchor 2 to the anchor fixing portion 6. If the head of the anchor 2 is fixed to the bottom surface of the anchor fixing portion 6a having a hemispherical shape or the anchor fixing portion 6b formed inside the anchor pipe 61, the head of the anchor 2 should not be projected from the surface of the anchor support plate 1. You can If the head of the anchor 2 does not project from the surface of the anchor bearing plate 1, the head of the anchor 2 may be damaged,
It does not protrude from the vegetation base material 4 described later.
The anchor pressure plate 1 is embedded in or in close contact with the slope 8 due to the introduced anchor force, fixing by the fixing device, and the weight of the anchor pressure plate 1, and is supported on the ground having a predetermined hardness.

<C> Arrangement of vegetation base material The vegetation base material 4 refers to a base material necessary for plant growth such as earth and sand, soil and fertilizer. If necessary, the vegetation base material 4 is mixed with a binder such as asphalt emulsion, seeds, and water. The vegetation base material 4 is arranged by spraying or the like inside the anchor pressure support plate 1 and on the slope 8 where the pressure support plate is not installed. If the vegetation base material 4 is sprayed with such a thickness that the top of the anchor bearing plate 1 is hidden, the entire slope can be greened. The vegetation base material 4 can be sprayed using a mortar spraying gun 41 or the like. On the slope 8 on which the vegetation base material 4 is arranged, seed spraying or planting is performed as needed.

[0019]

Since the anchor bearing plate and the slope stabilizing method of the present invention are as described above, the following effects can be obtained. <A> The upper part of the anchor bearing plate has a frame structure. Therefore, the vegetation base material can be arranged inside the anchor bearing plate. As a result, the entire slope can be greened. In particular, by arranging the vegetation base material inside the anchor bearing plate, the fixation of the vegetation base material is also improved. <B> The anchor bearing plate is lightweight because it is based on a frame structure. Therefore, it can be easily installed on the slope. In addition, since it is possible to install it without leveling the slope, there are few installation procedures and workability is good. <C> An anchor bearing plate is constructed using a dome-shaped or semi-circular member. Therefore, it is possible to make the structure strong against the anchor bearing pressure from above.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a slope stabilizing method according to the present invention.

FIG. 2 is a side view of an embodiment of a dome-shaped anchor bearing plate.

FIG. 3 is a perspective view of an embodiment of a dome-shaped anchor bearing plate.

FIG. 4 is a central cross-sectional view of an embodiment of a dome-shaped anchor bearing plate.

FIG. 5 is an explanatory view showing a procedure for installing an anchor pressure support plate.

FIG. 6 is a perspective view of an embodiment of a mesh lower frame.

FIG. 7 is a side view of an embodiment in which a contact type lower frame is arranged.

FIG. 8 is an assembly explanatory diagram when an anchor pipe is used.

FIG. 9 is a side view showing a state in which an anchor pipe is installed on a dome type pressure bearing plate.

FIG. 10 is an explanatory view showing a construction procedure of a slope stabilizing method.

FIG. 11 is a perspective view of an embodiment of a cross-shaped anchor bearing plate.

[Explanation of symbols]

1 ... Anchor bearing plate 1a ... Dome type pressure plate 1b ... Cross bearing plate 2 ... anchor 3 ... bottom frame 4 ... Vegetation base material 8 ... Slope

Claims (7)

[Claims] 1. An anchor bearing plate for fixing a head of an anchor to be mounted on an inclined surface, characterized in that curved members are combined in a dome shape to form a skeleton structure. Pressure plate. 2. An anchor bearing plate for fixing the head of an anchor to be mounted on a slope, which is a skeleton structure in which curved members are combined in a dome shape, and a lower frame installed on the slope. An anchor bearing plate, characterized in that it is configured by installing the above-mentioned dome-shaped frame structure on the lower frame. 3. An anchor bearing plate for fixing a head of an anchor to be mounted on a slope, characterized in that curved members are combined so as to have a cross-shaped outer shape, thereby forming a skeleton structure. Anchor bearing plate. 4. An anchor bearing plate for fixing the head of an anchor to be mounted on a slope, which is a frame structure in which curved members are combined so as to have a cross-shaped outer shape, and a structure is provided on the slope. An anchor bearing plate, comprising: a lower frame to be installed, wherein the cross-shaped frame structure is installed on the lower frame. 5. An anchor bearing plate according to any one of claims 1 to 4, characterized in that a frustoconical pipe material is arranged inside for anchoring the anchor. 6. An anchor is installed at intervals on a slope, the anchor bearing plate according to claim 1 is installed on the head of the anchor, and the head of the anchor is supported by the anchor bearing. A slope stabilization method in which vegetation base material is fixed on the pressure plate and the vegetation base material is placed inside the slope and the anchor bearing plate. 7. An anchor is installed at intervals on a slope, the lower frame constituting the anchor pressure plate according to claim 2 or 4 is installed on the head of the anchor, and the lower frame is provided with the above-mentioned lower frame. A slope stabilizing method, in which a skeleton structure is installed, the head of the anchor is fixed to the anchor bearing plate, and a vegetation base material is arranged inside the slope and the anchor bearing plate.