JPH1121886A - Block for stabilizing material ground slope, and structure of part coupling with anchor for fixing the block to natural ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a lightweight block for stabilizing the slope of a natural ground without degrading the strength. SOLUTION: A supporting pedestal 6 is fitted in a slope stabilizing block 1 in the coupling part with the top of an anchor 3 fixed into the ground, and the outside surface 6b of the pedestal in tight contact with the block 1 has a taper thinning toward the tip in the direction of the natural ground G while the inside surface of the pedestal 6 works together with a pressure bearing member 7 to support the top of the anchor so that its tension is transmitted to the pedestal 6 through the pressure bearing member 7, and the load applied to the pedestal 6 is dispersed into force directed approx. in the perpendicular direction from the tapered peripheral surface 6b and is borne by the block 1. The pedestal 6 is arranged as extending to the oversurface of the block 1 or near thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a block which is fixedly installed on a ground slope for stabilizing the slope, and more particularly to a block which is fixedly supported on the ground. The present invention relates to a structure of a connecting portion between an anchor fixed to the ground and a block.

[0002]

2. Description of the Related Art A block used for stabilizing a mountain slope is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-17425. As shown in FIG. 7, this known block has a concave portion 2a, a tapered hole 2b, and a through hole 2c in an upper and lower portion in a connecting portion 2 with an anchor provided in a central portion of the block 1, and a downward direction. The tapered hole 2b which tapers toward the bottom is formed by the inner peripheral surface of the conical tubular reinforcing member 2d. In the tapered hole 2b, a truncated conical anchor head support plate 2e having an outer peripheral surface having substantially the same taper as this hole is fitted.

The anchor 3 is fixed to the ground G by drilling an anchor hole G3 from a mounting surface G1 formed by cutting the ground G into the ground by using a boring machine such as a boring machine. Is inserted into the anchor hole G3, and the anchor base 3b is fixed by a cementing material 3c such as cement injected into the anchor hole G3.

[0004] In order to fix the block 1 on the ground mounting surface, the block is arranged at a predetermined position on the mounting surface G1 so as to conform to the anchor 3 to which the anchor 3 has been fixed.
Is projected upward through a hole provided in the through-hole 2c and the pressure plate 2d in the tapered hole 2b, and the projected upper end of the anchor is pulled by a predetermined traction device to tension the anchor. In the state, grip the upper end of the anchor member 4
The gripping member 4 is pressed against the supporting plate 2d by operating the tightening means 5, whereby the tension of the anchor is transmitted to the block 1 and the block is pressed against the installation surface G1 to be fixed. is there.

[0005]

By constructing the joint between the block and the anchor in this way, the load applied from the anchor to the joint can be reduced from the support plate 2d for the upper end of the anchor to the conical tubular reinforcing member 2e. And then dispersed from the reinforcement into the block, preventing the load from concentrating on a portion of the block, thereby reducing the thickness of the block. However, if the thickness of the block can be further reduced, the manufacturing cost, transportation cost, and the like of the block can be further reduced, and handling becomes easier.

[0006] It is an object of the present invention to improve the above-mentioned joint structure so that the thickness of the block can be further reduced.

[0007]

According to the first aspect of the present invention, the above object is attained as follows. That is,
It has a block that is fixed on the installation surface of the ground to be stabilized, and a support pedestal that is fitted into the block at a joint between the block and an upper end of an anchor fixed in the ground to fixedly support the block. The outer peripheral surface of the support pedestal, which is in close contact with the block, has a tapered shape tapering in the ground direction, and the inner peripheral side of the support pedestal cooperates with the supporting plate supporting the upper end portion of the anchor, thereby providing the anchor. Joint structure that transmits the tension of the pedestal to the support pedestal via the support plate, and distributes the load applied to the support pedestal to the force directed in a direction substantially perpendicular from the tapered outer peripheral surface to the block. In the above, the support pedestal extends to a range reaching the upper surface of the block or its vicinity.

According to this structure, the load applied from the support pedestal is dispersed over the entire thickness of the block, and a sufficient effect is obtained even if the thickness of the block is made thinner than before.

According to the second aspect of the present invention, since the supporting plate and the support base are integrally formed, the number of parts is reduced, and the procurement and management of parts are facilitated.
It is also advantageous for transportation.

According to the third aspect of the present invention, a flange is provided on the upper edge of the support pedestal, and this flange is mounted on the upper surface of the block. Is done.

According to the fourth aspect of the present invention, a tapered hole tapered in the ground direction is provided on the inner peripheral side of the support pedestal, and the supporting plate supporting the upper end portion of the anchor fits into this tapered hole. Therefore, a material having an appropriate thickness according to the load to support the supporting plate can be selected and used.

According to the fifth aspect of the present invention, since the upper end of the anchor projecting above the supporting plate is disposed inside the upper edge of the support pedestal, the upper end of the anchor is grasped and supported from falling rocks. The effect of protecting the member is also obtained.

[0013]

FIG. 1 is a plan view showing an example of a block to which the present invention is applied. The block 1 has a cross shape having legs 1b extending in four directions from a central portion 1a.
The bottom is a flat surface so as to come into contact with the above-mentioned ridge installation surface G1. The central portion 1a is provided with a connecting portion 2 to the anchor 3 described above.

FIG. 2 is an enlarged sectional view taken along the line AA of FIG. 1 and shows one embodiment of the connecting portion structure of the present invention.
In the figure, 6 is embedded in the block 1 at the joint 2,
Or a support pedestal fitted into the support pedestal 6
Has an outer peripheral surface 6b having a tapered shape in the direction of the bottom surface 1c of the block 1, that is, the ground direction, and the outer peripheral surface extends to the upper surface 1d of the block 1 or to the vicinity thereof. The outer peripheral surface is preferably a smooth tapered surface as shown in the figure, but it is sufficient if the entire outer peripheral surface is tapered even if it has irregularities.

A lower portion of the support base 6 is formed as a support plate 7, which is provided with a hole 7a for inserting the anchor 3, and an upper surface of the support plate supports an upper end gripping means of the anchor. It has been made flat.

A through hole 8 is provided in the block 1 below the support plate 7, and the through hole is protected by a reinforcing sleeve 8a. The anchor insertion hole 7a and the through hole 8a communicate with each other, and the upper end of the anchor is allowed to protrude above the pressure platen 7 through these communication holes. In FIG. 2, reference numeral 1e denotes a steel wire or a steel rod disposed in the PS concrete block 1. In some cases, the block portion corresponding to the length of the through hole 8 may be omitted, so that the lowermost end of the support base 6 and the block bottom surface may be at the same level without providing the through hole 8. In that case, of course, the steel wire or the steel bar in the block will be arranged at a position above the lowermost part of the support base 6.

The above-mentioned means for gripping the upper end of the anchor projecting upward from the support plate 7 is disclosed in, for example,
No. 1440 discloses a known means, which is screwed into a cone 4 connected to an anchor upper end 3a by driving a wedge 4a, and a male screw formed on an outer peripheral surface of the cone. And a tightening nut 5 which is pressed against the upper surface of the supporting plate 7 by the tightening force of the anchor.
As a result, the block is pressed against the ground mounting surface and is fixedly installed. When the tension of the anchor is relaxed after a long period of time, a female screw member provided on a tensioning tool such as a jack is screwed into a male screw provided on the outer peripheral surface of the cone 4, and the tensioning tool is operated to be connected to the cone 4. The anchor 3 is pulled, and at this time, the tightening nut 5 which is pulled integrally with the cone 4 and floats from the supporting plate body 7 is turned toward the cone to move in the direction of the supporting plate body. This is to release the traction by the tensioning tool.

The tension or load generated in the anchor 3 as a result of pressing and fixing the block against the ground in this manner is transmitted to the support pedestal 6 via the supporting plate 7 and further transmitted to the block. The transmission of the load from the pedestal 6 to the block 1 is performed in a direction oblique to the axis of the block 1 from the entire tapered outer peripheral surface of the support pedestal, so that the block receives the load in a wide range, In particular, since the tapered outer peripheral surface of the support base extends to the upper surface 1d of the block 1 or its vicinity,
The load is effectively dispersed in the block, and can cope with a required load even if the block thickness is reduced.

FIG. 3 shows an embodiment in which a tapered hole 6a tapered in the ground direction is provided on the inner peripheral side of the support base 6, and a truncated conical pressure platen 7 is fitted into this tapered hole. Is shown. The support plate 7 has a thickness substantially from the lower end to the upper end of the support pedestal 6. Therefore, the load transmitted from the nut e to the support plate 7 is a tapered hole 6 a of the support base 6.
It is transmitted uniformly over the entire surface of the block and is dispersed into the block, so that it is configured to withstand a large load.

FIG. 4 shows a state in which the upper edge of the support base 6 has a flange 6.
c, this flange is placed on the upper surface of the block 1,
An embodiment in which the load is distributed also from the flange toward the block is shown, and the supporting platen 7 in the embodiment shown in FIG. 3 is supported by the upper half of the tapered hole 6a of the support base 6 together with the flange. Is shown.

FIG. 5 shows a structure in which the supporting pedestal 6 has the flange 6a and the support plate 7 is supported by the intermediate portion of the tapered hole 6a, and the anchor head and the means for holding the same, that is, the cone 4 and An embodiment is shown in which the nut 5 is also housed in the tapered hole 6a, thereby having the effect of protecting the upper end of the anchor and its holding member from falling rocks and the like.

FIG. 6 shows the embodiment shown in FIG.
This embodiment shows an embodiment in which a concave portion 7b for accommodating the anchor head holding means is provided on the upper surface of the support plate body 7 to protect the holding means.

[0023]

According to the present invention, as described above, the required strength can be obtained even if the block has a small thickness, so that the amount of the concrete material used can be reduced. Therefore, the manufacturing cost is reduced and the weight is reduced, so that the cost for transporting the block, which is a factory-produced product, to the site and the cost of transport and handling at the site are reduced, and an effect is obtained that an economical block can be obtained. Things.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a block to which the present invention is applied.

FIG. 2 shows one embodiment of a joint structure according to the present invention as A in FIG.
It is an expanded scale sectional view shown in the state cut along the -A line.

FIG. 3 is a cross-sectional view similar to FIG. 1, illustrating another embodiment of the present invention.

FIG. 4 is a cross-sectional view similar to FIG. 1, but showing still another embodiment of the present invention.

FIG. 5 is a sectional view similar to FIG. 1, but showing still another embodiment of the present invention.

FIG. 6 is a cross-sectional view similar to FIG. 1, but showing still another embodiment of the present invention.

FIG. 7 is a diagram showing a block in a central longitudinal section of a block in a state where a conventional connecting portion structure is installed on the ground.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Block 2 Connecting part 3 Anchor 6 Support pedestal 6a Inner peripheral surface 6b Outer peripheral surface 6c Flange 7 Support plate 7a Hole 8 Through hole

Claims (5)

[Claims] 1. A joint between a block fixed on an installation surface of a ground to be stabilized and an upper end of an anchor fixed in the ground for fixedly supporting the block,
It has a support pedestal fitted into the block, and the outer peripheral surface of this support pedestal that is in close contact with the block has a tapered shape that tapers in the ground direction, and the inner peripheral side of the support pedestal supports the upper end of the anchor. Cooperates with the support plate, thereby transmitting the tension of the anchor to the support pedestal via the support plate, and dispersing the load applied to the support pedestal into a force directed in a direction substantially perpendicular to the tapered outer peripheral surface and blocking the block. In the connecting portion structure, the support pedestal extends to a range reaching the upper surface of the block or the vicinity thereof, and the ground slope stabilizing block and the block are attached to the ground. Connection structure with anchor to fix. 2. The joint structure according to claim 1, wherein the support plate and the support pedestal are integrally formed. 3. The joint structure according to claim 1, wherein a flange is provided on an upper edge portion of the support pedestal, and the flange is mounted on an upper surface of the block. 4. The support base is provided with a tapered hole tapered in the ground direction on an inner peripheral side of the support pedestal, and a supporting plate supporting an upper end portion of the anchor is fitted into the tapered hole. The joint structure according to claim 1 or 3. 5. The joint structure according to claim 1, wherein an upper end portion of the anchor protruding above the supporting plate is disposed inside an upper edge of the support base. .