JP2547362Y2 - Slope concrete block - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-shaped or radial concrete block for slope protection for protecting a slope.

[0002]

2. Description of the Related Art Generally, cross-shaped or radial-shaped concrete blocks for slopes for protecting slopes are shown in FIG.
The bottom surface is formed flat. These slope concrete blocks 10 are laid on the slope 20 and fixed by the underground anchor 30.

[0003]

However, the slope 20 on which the concrete block for slope 10 is laid is not always flat, but is uneven, so that the familiarity with the lower surface of the concrete block for slope 10 is poor. . In particular, when the laying surface has a concave portion 40 as shown in FIG. 6, the arm portion 50 is in a simple beam state, and the bending moment is almost twice as large as that at the time of design. When the material 30a is strained, there is a problem that a crack occurs in the arm portion 50. The present invention has been made in view of the above-described problems, and its purpose is to prevent the occurrence of cracks when laying and fixing a concrete block for a slope, even when the slope is uneven. Is to do so.

[0004]

[Summary of the above problems in order to solve the slopes for concrete blocks of the present invention is protruded plurality of arm portions radially from the central portion, and the ground anchor in its central part In a concrete block for a slope having a fixing portion of a tensile material, a lower surface of the arm portion may be a tip portion.
Along the long side direction from the central portion to the central portion.
Is curved downward so that it is most inflated, and the arm
Lower part so that the center part swells the most even along the short side direction of the part
It is characterized by being curved .

[0005]

[Action] The lower surface of the arm in the concrete block for the slope , the long side direction from the lower end of the arm to the center.
The central portion is curved downward so as to swell the most.
And the center of the arm is
By bending it downwards so that it swells the most , the tension on the underground anchor tension can cause a rough slope.
Also, the land mountain lower surface of the arm portion toward the center or al destination end
Since slips in contact with, it is possible to prevent the occurrence of cracks to be able to concentrate the reaction force to the central portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a concrete block for a slope according to the present invention will be described below in detail with reference to the drawings.
1 is a plan view of a concrete block for a slope, FIG. 2 is a sectional view of the same, FIG. 3 is a sectional view of the concrete block, and FIG.

As shown in FIG. 1, the slope concrete block 1 is integrally formed in a cross shape with vertical and horizontal arms 2 projecting in four directions. A concave fixing portion 3 is formed at a center position intersecting the cross shape, and a tensile material insertion hole 4 penetrating to the lower surface is opened at the center of the fixing portion 3.

The upper surface of the arm portion 2 is formed so as to be higher from the front end toward the center portion, and the lower surface is formed to be curved downward from the front end to the center portion so that the center portion is the most expanded. This bulge is 2 mm to 3 mm at the largest central part.
mm. The lower surface is curved not only in the long side direction but also in the short piece direction as shown in FIG. Although the bulge is about 2 mm to 3 mm in this embodiment, the bulge is not limited to this, and can be set as needed.

The arm 2 has a PC over its entire length.
The steel material 5 is inserted in a cross-shaped arrangement, and tension is fixed at both ends thereof, so that a prestress is given vertically and horizontally.
In addition, this PC steel material 5 has one arm 2 in the drawing.
Are inserted in each case, but an arbitrary number can be selected according to the size of the concrete block for slope 1 and the length of the arm 2.

Next, this concrete block for slope 1
Will be described with reference to FIG. First, the anchor hole 7 is drilled while pushing the casing into an appropriate portion of the slope 6 to be constructed by a drilling machine. After the grout 8 made of cement milk is press-fitted into the anchor hole 7, the corrugated sheath is inserted, and the grout is also press-fitted into the corrugated sheath and the tensile material 9 is inserted.

After fixing the tip of the tension member 9 in the grout 8 cast in the anchor hole 7 as described above, one end of the tension member 9 is tensioned on the slope concrete block 1 laid on the slope 6. It is inserted into the material insertion hole 4 and tensioned by the tension jack to fix. During this tension, even if the slope 6 is uneven, the lower surface of the slope concrete block 1 comes into contact with the ground gradually from the central portion where it is most swelled to the tip portion, so that the lower surface is grounded. Since it sinks into the mountain, stable installation can be performed, and generation of cracks and the like can be prevented.

[0012]

[Effect of the invention] The arm in the concrete block for slope
The lower surface along the long side from the tip to the center.
When the central portion is curved downward so as to swell the most,
In both cases, the center part is the most expanded even along the short side direction of the arm part.
The underground anchor has been curved down
When the tension material is strained, even on uneven slopes,
The lower surface of the arm contacts the ground from the center to the tip.
So that the reaction force can be concentrated in the center
As a result, the occurrence of cracks can be prevented.

The lower surface of the arm extends from the tip to the center.
Along the long side direction, lower the center so that
To the side and along the short side of the arm
Also, the central part is curved downward so that it expands the most.
Contact pressure at the center can be greater than at the ends
Therefore, the anchor force propagating into the ground can be effectively applied.
Can be.

The lower surface of the arm extends from the tip to the center.
Along the long side direction, lower the center so that
To the side and along the short side of the arm
Also, the central part is curved downward so that it expands the most.
Can handle uneven slopes
Therefore, the flexibility of construction can be increased and
It can be set up.

[Brief description of the drawings]

FIG. 1 is a plan view of a slope concrete block.

FIG. 2 is a side view of a slope concrete block.

FIG. 3 is a cross-sectional view of a slope concrete block.

FIG. 4 is a sectional view of an arm.

FIG. 5 is a cross-sectional view in which a slope concrete block is constructed on the slope.

FIG. 6 is a cross-sectional view in which a conventional slope concrete block is applied to a slope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slope concrete block 2 Arm part 3 Fixing part 4 Tensile insertion hole 5 PC steel

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of arm portions from the center portion is protruded radially, and in slope for concrete block comprising a fixing portion of the tension member in the ground anchor in its center, before
Place the lower surface of the writing arm on the long side from the tip to the center.
Along the direction, so that the center is
Bend the arm and move it along the short side of the arm
A slope concrete block characterized in that a part is curved downward so as to bulge most .