JP3374060B2 - Bearing member for slope stabilization method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope stabilizing method for stabilizing a slope by transmitting a tension force applied to an anchor rod driven into a slope ground to a slope through a bearing member. Regarding the pressure member.

[0002]

2. Description of the Related Art The pressure bearing member used in the slope stabilization method is generally made of concrete, but as the pressure bearing member made of steel, those shown in FIGS. 7 and 8 have been proposed. In this pressure bearing member 1, an anchor rod insertion hole 2a is formed in the center of a bottom plate 2 made of a rectangular steel plate, and a cylindrical body 3 made of a short round steel pipe is vertically welded and fixed according to the anchor rod insertion hole 2a. It has a structure in which a reinforcing rib 4 is welded and fixed perpendicularly to the outer periphery of the body 3 and the upper surface of the bottom plate 2 (see Japanese Patent Application No. 7-293548).

As shown in FIG. 8, the bearing member 1 is an anchor rod (lock bolt) driven into a slope ground 8.
The bottom plate 2 is placed on the ground surface 8a by inserting the portion of the cylindrical body 3 into the above-ground protruding portion of 5, and the nut 7 is screwed onto the upper end portion of the anchor rod 5 protruding from the cylindrical body 3 with the washer 6 interposed. By tightening the nut 7, a tension force is applied to the anchor rod 5, and the tension force is transmitted to the slope ground through the bottom plate 2 of the bearing member 1. As a result, the ground supporting force (bearing pressure) is obtained.

In the target slope stabilization area, by supporting the ground (ground support) by the anchor rod 5 and the bearing member 1 as described above at appropriate intervals, a tree that grows naturally on the slope It is possible to prevent deformation of the slope and prevent collapse without cutting the forest.

[0005]

As described above, the slope stabilization method does not need to cut down trees that grow naturally on the slope, which is excellent in terms of conservation of the natural environment and is also effective for slope stabilization itself. Although effective, plant growth is naturally hindered in the support member 1. It is more desirable that the plant can grow also in the support member 1 in terms of conservation of the natural environment.
From the standpoint of workability of the slope stabilization method, it is desirable to reduce the weight of the bearing member.

[0006] The present invention has been made in view of the above circumstances, is lightweight, and the slope supporting structure is preferable in terms of conservation of the natural environment because it does not hinder the growth of plants in the bearing member. An object is to provide a pressure bearing member for legal use.

The present invention, which solves the above-mentioned problems, provides a natural slope land.
The tension applied to the anchor rods that were driven into the board at intervals.
Stabilize the slope by transmitting the tension to the slope through the bearing member.
A bearing member used in a slope stabilization method, comprising a bottom plate made of a steel plate having an anchor rod insertion hole, and a steel pipe vertically fixed to the bottom plate in accordance with the anchor rod insertion hole of the bottom plate. From the body and the steel plate that is welded and fixed perpendicularly to the body and the outer circumference of the cylinder and the upper surface of the bottom plate.
In a bearing member for a slope stabilization method comprising a plurality of reinforcing ribs, the reinforcing rib and the reinforcing rib of the bottom plate
During the circumferential direction, it is possible to grow plants from the ground below
It is characterized in that an elongated opening is provided in the.

[0008]

A second aspect of the present invention is characterized in that an expanded metal or a perforated plate is attached to the opening of the pressure bearing member of the first aspect.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to FIG.
It will be described with reference to the embodiment shown in to 4. FIG. 1 shows a state in which a bearing member 11 according to an embodiment of the present invention is arranged on a ground protrusion of an anchor rod 5 and a tension force is applied to the anchor rod 5, and FIG. 2 shows a state in which a cap in FIG. 1 is removed. A
FIG. As shown, this bearing member 11
Is a bottom plate 12 made of a steel plate having an anchor rod insertion hole 12a and the anchor rod insertion hole 12 of the bottom plate 12.
A cylindrical body 13 made of a short round steel pipe which is vertically welded and fixed to the bottom plate 12 in accordance with a, and is vertically welded and fixed to both sides between the outer periphery of the cylindrical body 13 and the upper surface of the bottom plate 12 on four sides of the cylindrical body 13. And reinforcing ribs 14 on all four sides.

In the bearing member 11 of the embodiment, the bottom plate 12 is provided with an opening 15 through which the plant can grow from the ground. In the illustrated example, an opening 15 of an arc-shaped elongated hole is opened in all four sides of the bottom plate 12, and an expanded metal 16 is attached to the opening 15 of the arc-shaped elongated hole. Further, instead of the expanded metal 16, a perforated plate having a large number of small holes formed in a flat plate may be attached. Further, the opening may be a simple hole to which an expanded metal or a perforated plate is not attached.

The pressure bearing member 11 in the illustrated example has a pedestal 18 for receiving a nut 17 screwed onto the upper end of the anchor rod 5 in order to apply a tension to the driven anchor rod 5, and the cylindrical body 13 It is fixed by welding at the intermediate height position on the inner surface. This is to prevent the upper end of the anchor rod 5 from protruding to the surface of the earth when the cylindrical body 13 is buried in the soil after the construction is completed. 18
Reference symbol a denotes a rib that reinforces the pedestal 18. Further, a bearing plate 20 having a spherical concave surface as a washer, and a spherical washer 21 having a spherical convex surface are arranged on a pedestal 18.
Thereby, even when the bottom plate 5 is not orthogonal to the anchor rod 5, the tightening force of the nut 17 can be transmitted by surface contact. In addition, at the upper end of the circular cylindrical body 13,
A cap 22 for closing the upper end opening is detachably attached.

When the slope stabilization method is applied using the bearing member 11, the short anchor rod 5 having a length of, for example, 1, 5 to 2 meters is used for the slope ground by using an anchor rod driving machine (not shown). 8 or more, depending on the depth of the bedrock, for example 2 or 3 or more couplers 2
It drives while connecting sequentially through 3, and the bit of the tip not shown reaches the rock. Next, the portion of the cylindrical body 13 of the bearing member 11 is inserted into the above-ground protruding portion of the anchor rod 5, and above the pedestal 18, the bearing plate 20 and the spherical washer 21 are interposed, and the screw portion of the upper end of the anchor rod 5 is inserted. The nut 17 is screwed onto the 5a and tightened to give a tension force to the anchor rod 5. Thereby, the tension force of the anchor rod 5 is transmitted to the slope ground through the bottom plate 12 of the pressure support member 11, and the ground support force (bearing pressure) is obtained. Then, the cap 22 is put on.

In the above, since the opening 15 is formed in the bottom plate 12, the weight of the bearing member can be reduced and the workability is good. The opening 15 does not hinder the growth of plants from the ground below. The expanded metal 16 and the perforated plate attached to the opening 15 rarely hinder the growth of plants.

Further, since the expanded metal 16 is attached to the opening 15, the ground supporting function is effectively achieved. Therefore, it is possible to reduce the weight of the bearing member while securing the ground supporting force required for the bearing member 11. The opening 15 is made of expanded metal 1.
6 or even a simple hole without a perforated plate, if the opening does not exist near the outer peripheral edge and is not too large, it does not affect the bearing capacity of the bearing member so much,
It is possible to reduce the weight of the bearing member while securing the ground support force required for the bearing member.

[0016]

The shape of the bottom plate of the bearing member is not limited to the quadrangle as in the above-mentioned embodiment , but is an octagon, or, as shown in the plan view of FIG. 5, has a side slightly curved in an arc shape. The shape may be a triangular shape with the corners cut away. The substantially triangular bottom plate 42 is made of a steel plate, and the openings 4 of the arc-shaped long holes are formed along each side of the bottom plate 42.
9 is opened, and an expanded metal 50, for example, is attached to the opening 49 of the arc-shaped elongated hole. 5 and FIG. 6 showing the front view, 41 is a bearing member, 43 is a cylindrical body made of round steel pipe, 44 is a reinforcing rib made of steel plate, 48
Is a pedestal welded and fixed to the inner surface of the cylindrical body 33.

[0018]

According to the present invention, the bottom plate of the pressure bearing member is reinforced.
Between the ribs for reinforcement and the ribs for reinforcement
Since the opening that allows growth is provided, the bearing member can be lightened and the workability of the slope stabilization method is improved. In addition,
It is also possible to prevent the growth of plants from affecting the pressure member.
A bearing that can be eliminated and is good for conservation of the natural environment.
I was able to obtain wood.

[0019]

When an expanded metal or a perforated plate is attached to the opening of the bottom plate as in claim 2 ,
It effectively acts as a ground support without inhibiting the growth of plants. Therefore, it is possible to reduce the weight of the bearing member while securing the ground support force required for the bearing member. The opening is provided with expanded metal or perforated plate.
Even if it is a simple hole, make sure that the opening is
Ground support of the bearing member
Since it does not affect the force so much, the pressure bearing member is also required.
The weight of bearing members is reduced while ensuring sufficient ground support.
You can

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a slope stabilization method performed using a pressure bearing member according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 with a cap removed.

FIG. 3 shows another embodiment of the shape of the bottom plate of the present invention, and is a plan view of the bearing member with the cap removed .

4 is a cross-sectional view of Bearing member of FIG.

FIG. 5 is a plan view showing a conventional bearing member.

6 is a cross-sectional view illustrating a slope stabilization method was performed using Bearing member of FIG.

[Explanation of symbols]

5 anchor rod 5a threaded portion 11, 41 Bearing members 12, 42 bottom plate 12a anchor rod insertion holes 13 and 43 the cylindrical body 14, 44 reinforcing rib 15 opening 15a hole 15b expanded metal 18 and 48 cradle 20 Bearing plate 21 Spherical washer 22 cap

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 9-111761 (JP, A) Actual Kaihei 7-44346 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02D 17/20 103 E02D 5/80

Claims (2)

(57) [Claims] [Claim 1] Natural sloped ground is driven at intervals.
The tension applied to the anchor rod is applied to the slope via the bearing member.
It is used for the slope stabilization method that transmits to the ground to stabilize the slope.
A Bearing member, steel having an anchor rod insertion hole
A bottom plate made of a plate, a tubular body made of a steel pipe vertically fixed to the bottom plate in accordance with the anchor rod insertion hole of the bottom plate, and vertically welded to both of the outer periphery of the tubular body and the top surface of the bottom plate. A bearing member for a slope stabilization method, comprising a plurality of reinforcing ribs made of a steel plate, the ground ribs being provided between the reinforcing ribs and the reinforcing ribs of the bottom plate.
A bearing member for a slope stabilization method, which is provided with an elongated opening in the circumferential direction, which enables growth of plants from the surface . Wherein Bearing member for slope stabilization method according to claim 1, characterized in that fitted with expanded metal or perforated plate in the opening.