JP3748467B2 - Method and apparatus for aligning anchor material at a joint portion between a natural ground slope stabilization block and an anchor material for fixing the block to the natural ground - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to stabilization of a natural slope, and more particularly to the stabilization of the natural slope by installing a block on the natural slope and fixing the block to the natural ground with an anchor material. In particular, the present invention relates to an anchor material alignment method and apparatus at a joint between a block and an anchor material. In the present specification, the term “alignment of the anchor material” means that the action direction of the tension in the anchor material is substantially aligned with the above-described joint portion.
[0002]
[Prior art]
A conventional method for stabilizing natural slopes by installing blocks is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-17425. In this method, as shown in FIG. 3, a part 1 a of the natural ground 1 is cut to form an installation surface 1 b, and then an anchor material 3 such as an anchor cable and an anchor rod is installed. The concrete block 2 is arranged on the surface 1b, the head 3a of the anchor material 3 previously installed and the block 2 are coupled, and the block 2 is installed by the fastening means 6 provided on the anchor material head 3a. It is pressed against and fixed. Installation of the anchor material 3 is performed by drilling the anchor hole 1c from the ground surface 1b toward the ground with a drilling machine such as a boring machine, and then inserting the anchor material 3 into the anchor hole. Is performed by fixing with a caking material 3c such as cement injected into the anchor hole 1c.
[0003]
The block 2 has a tapered hole 2a that is tapered toward the anchor material base 3b at the joint with the anchor material provided at the center thereof. An anchor material head support member 4 having a truncated conical shape having an outer peripheral surface having the same taper is fitted. The anchor material 3 passes through a hole provided in the anchor material head support member 4 and protrudes from the top surface of the support member. The protrusion 5 has a means 5 for gripping the anchor material and a support member for the anchor material. Fastening means 6 for fastening 4 in the direction of the anchor base 3b is attached. In addition, 7 is a lid | cover which covers the recessed part 2b in which the said coupling | bond part is arrange | positioned, and protects the member inside.
[0004]
[Problems to be solved by the invention]
When the anchor material is installed on the natural ground as described above, the anchor material is not always installed at a right angle with respect to the natural ground installation surface 1b due to various causes such as the condition of the natural ground and the way of working. . When the block 2 is not a right angle, when the block 2 is arranged at a predetermined position on the installation surface 1b and coupled with the anchor material head 3a, the anchor material 3 is bent between the head 3a and the other part. Since the state where the tension is applied is not aligned, the support action of the anchor material 3 is not sufficiently exhibited, which is not preferable. Therefore, conventionally, the taper hole 2a of the block 2 is formed by being deflected according to the extending direction of the installation anchor material 3, and the anchor material head support member 4 is fitted in the taper hole 2a. Measures are taken so that the other anchor material parts are aligned with each other. However, it is extremely disadvantageous in any aspect of work, time, and cost to form the tapered hole 2a so as to be deflected in accordance with the installation state of the anchor material 3 each time.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method and an apparatus that can easily and arbitrarily align an anchor material without adjusting and changing a tapered hole of a block.
[0006]
[Means for Solving the Problems]
According to the present invention, an eccentric liner having an outer peripheral surface adapted to a tapered hole provided in a block and having an eccentric taper hole into which an anchor material head support member is fitted is used according to the present invention. Then, the eccentric liner is fitted into the block taper hole in the joint portion between the anchor material installed in advance and the block arranged on the installation surface, and the center line of the eccentric liner taper hole is in the same direction as the extending direction of the anchor material. This is solved by rotating the eccentric liner in the block taper hole.
[0007]
According to this method, since the eccentric liner as described above is used, and the eccentric liner can be adjusted by simply rotating and adjusting the eccentric liner within the block taper hole, the angle of the anchor head can be adjusted. The alignment operation can be achieved quickly, easily and inexpensively without preparing a block adjusted so that the angle of the shaft center matches the extending direction of the anchor material each time.
[0008]
Further, according to the present invention, the above-described problem is that an eccentric liner having an outer peripheral surface adapted to a tapered hole provided in the block and having an eccentric tapered hole is fitted into the tapered hole of the eccentric liner. This can be achieved by a device having an anchor material head supporting member.
[0009]
According to this device, alignment of the anchor material can be performed freely only by adding an eccentric liner to the block having the conventional configuration.
[0010]
If the cross-sectional shape of the block taper hole is a polygon instead of a circle, and the outer peripheral surface of the eccentric liner is a similar polygonal pyramid, the angle adjustment of the anchor head will be gradual. The eccentric liner whose angle is adjusted is maintained in the adjusted state without rotating in the block taper hole.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same member as the member shown in FIG. 3, and detailed description is abbreviate | omitted.
[0012]
FIG. 1 is a longitudinal sectional view showing a connecting portion of the block 2 to the anchor material, and FIG. 2 is a plan view of the block of FIG.
[0013]
The block 2 is made of concrete like the conventional one, and has a substantially cross shape or rectangular shape as a whole. A concave portion 2b that is widened upward is formed in the central portion of the block 2, and it penetrates in the thickness direction of the block 2 between the bottom portion 2c of the concave portion and the bottom surface 2d that is in contact with the ground surface. A tapered hole 2a is formed. In the illustrated embodiment, the tapered hole 2a is formed by an inner peripheral surface of an iron funnel-shaped protective material 2e provided for reinforcement.
[0014]
An eccentric liner 8 is fitted in the tapered hole 2a. This eccentric liner has an outer peripheral surface that fits into the tapered hole 2a, and has an eccentric tapered hole 8a into which the truncated cone-shaped anchor material head support member 4 is fitted. Therefore, the center line 8b of the taper hole 8a forms an angle θ with respect to the center line 2a1 of the block taper hole 2a, and this angle θ changes the relative position by rotating the eccentric liner 8 within the taper hole 2a. However, it is always kept constant. This angle θ can be changed by using another eccentric liner having a different inclination of the center line of the eccentric taper hole 8a.
[0015]
As is apparent, the outer peripheral tapered surface of the support member 4 and the tapered surface of the tapered hole 8 are on the same conical surface. The eccentric liner 8 is preferably made of metal, but may be made of plastic or other material.
[0016]
The block taper hole 2a may be a polygonal pyramid, and the outer peripheral surface of the eccentric liner 8 may be a polygonal pyramid.
[0017]
When performing the installation work of the block 2, the block 2 is first placed at a predetermined position on the ground surface 1b (see FIG. 3), and at the same time, the head of the anchor material 3 (see FIG. 3) installed in advance. Is drawn into the eccentric liner taper hole 8a from the bottom surface 2d side of the block 2. Next, the eccentric liner 8 is rotated in the block taper hole 2a so that the extending direction of the anchor material 3 and the center line of the eccentric liner taper hole 8a are in the same direction or substantially the same direction. If both of the rotations of the eccentric liner do not become the same direction, the eccentric liner is replaced with another eccentric liner 8 having a different inclination of the center line 8b of the tapered hole 8a. Which eccentric liner is used can be determined by the angle formed between the block installation surface 1b and the anchor material 3. When the angle between the installation surface 1b and the anchor material 3 is a right angle or close to it, a liner having a concentric taper hole 8a is used instead of the eccentric liner.
[0018]
After adjusting the angular position of the eccentric liner 8 as described above, the anchor material head is inserted into the through hole provided in the axial direction in the anchor material head support member 4 inserted into the eccentric liner taper hole 8a, and then supported. The anchor material portion protruding upward from the member 4 is gripped by the gripping means 5 (FIG. 3), and then the anchoring means 6 is moved relative to the support member 4 so as to draw the anchor material upward. The support member 4 is integrated with the eccentric liner 8 and the block 2, and the block 2 is pressed against the installation surface 1 b of the natural ground, and the installation of the block 2 is completed.
[0019]
【The invention's effect】
As described above, according to the present invention, the alignment of the anchor material is achieved by selecting an eccentric liner having a taper hole having an appropriate axis inclination and rotating it in the block taper hole. The cost for the heart is relatively low, and the alignment work can be performed easily. Therefore, the block can be installed economically and quickly, and the block itself can be manufactured uniformly. It can be mass-produced at low cost.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a central portion of a block showing an anchor material aligning method and apparatus according to the present invention.
FIG. 2 is a plan view of FIG. 1 with an anchor material head support member removed.
FIG. 3 is a cross-sectional view showing the relationship between a block installed on a natural slope and an anchor material.
[Explanation of symbols]
1 ... Natural ground 1b ... Block installation surface 1c ... Anchor hole 2 ... Block 2a ... (Block) taper hole 2d ... (Block) bottom face 3 ... Anchor material 3a ... Anchor material head 4 ... Anchor material head support member 5 ... Grip means 6 (of anchor material head) ... Tightening means 8 ... Eccentric liner 8a ... Tapered hole (of eccentric liner)

Claims (3)

An eccentric liner having an outer peripheral surface adapted to a tapered hole provided in a block installed on a ground surface to be stabilized and eccentrically having a tapered hole into which an anchor material head support member is fitted. The above-mentioned eccentric liner is fitted in the block taper hole in the joint portion between the anchor material used in advance and the block arranged on the installation surface, and the center line of the eccentric liner taper hole is in the same direction as the anchor material extending direction. Alignment of the anchor material at the joint between the natural slope stabilization block and the anchor material for fixing the block to the natural ground, wherein the eccentric liner is rotated within the block taper hole. Method. An eccentric liner having an outer peripheral surface matching a tapered hole provided in a block installed on the installation surface of the ground to be stabilized and having an eccentric tapered hole, and fitted into the tapered hole of the eccentric liner An alignment device for an anchor material at a joint portion between a natural ground slope stabilization block and an anchor material for fixing the block to the natural mountain, comprising an anchor material head support member. 3. The aligning device according to claim 2, wherein the block taper hole has a polygonal shape, and the outer peripheral surface of the eccentric liner has a similar polygonal pyramid shape.

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