KR101237645B1 - Earth anchor bracket for angle regulating - Google Patents

Abstract

PURPOSE: An earth anchor bracket for adjusting an angle is provided to easily move the position of a loading plate so that the angle of the loading plate is smoothly adjusted, and the buckling deformation and the stress concentration of an arch-shaped vertical plate are restrained for preventing the damage and failure of the vertical plate. CONSTITUTION: An earth anchor bracket for adjusting an angle includes a pair of vertical plates(12), upper/lower part position spreading prevention plates(14A,14B), stress dispersion-grounding extension plates(16), a loading plate covering plate(18), and a loading plate(20). The vertical plates having upper arched surfaces corresponding to a prescribed radius of curvature in the range of a certain angle are arranged to be mutually opposed at regular intervals. The upper/lower part position spreading prevention plates are respectively bound to the inner sides of the upper and the lower portions of the vertical plates, and prevent part positions from being spread. The stress dispersion-grounding extension plates having arched surfaces of which the curvatures are identical to the curvatures of the vertical plates are bound to the vertical plates. One interval of the loading plate covering plate having an arched surface of which the curvature is identical to the curvature of the vertical plate covers the arched surfaces of the vertical plates. The other interval of the loading plate covering plate is extended to the lower part position spreading prevention plate, and is bound to the vertical plates. The loading plate supported by the loading plate covering plate is secondly adjustable within a certain angle of the arched surface.

Description

Earth anchor bracket for angle regulating

The present invention relates to an earth anchor bracket used in the earth anchor method, and more particularly, to an angle anchor bracket for angle adjustment to prevent stress concentration and buckling deformation of a vertical plate that forms smooth angles of an arch plate and an arc.

In general, the earth anchor method is widely used along with the method of using the girders and braces to support the temporary wall against side pressure such as earth pressure and hydraulic pressure acting on the retaining wall during excavation work of civil engineering or building construction. In the conventional earth anchoring method, a strip of H beam is installed on a temporary wall, and then a perforation hole is formed toward the rear surface of the temporary wall. After that, the steel wire is fixed by inserting the steel wire into the drilling hole and grouting. At this time, a portion of the steel wire is exposed to a certain length in the drilling hole. Then, the earth anchor bracket is inserted into the strand, and then settled in the strip, and the strand is tensioned and fixed to the earth anchor bracket to maintain the upright wall and resist lateral pressure.

On the other hand, when a slight change in the angle of the drilling hole occurs, the insertion angle of the steel wire is changed, so the fixing position of the steel wire should be moved. To this end, a conventional method of clamping the side plate and the pressure plate as a tooth coupling structure has been used. Because of this concentration, breakage and buckling are more likely to occur and it is also very difficult to adjust the angle of the wire.

As a background technology of the present invention, an earth anchor bracket having a curved portion having teeth formed as Korean Patent Registration No. 10-0760213 is proposed. It comprises two side plates formed with curved portions having teeth and opposed to each other; A connection member for connecting and fixing the both side plates; And acupressure means supported by the both side plates, the jaw engaging with the teeth of the both side plates and a through portion for drawing out the free field of the anchor body.

However, the background art does not propose an alternative to prevent stress concentration and buckling deformation of the arcuate side plates.

Korea Patent Registration No. 10-0898830 Korea Registration Utility Model Registration No. 20-0344979

The present invention is to provide an angle anchor bracket for angle adjustment to prevent the smooth concentration of the backing plate and the stress concentration and buckling deformation of the vertical plate forming the arch.

According to a suitable embodiment of the present invention,
A pair of vertical plates having an upper arch curved surface along a predetermined radius of curvature at intervals of a predetermined angle and disposed to face each other at regular intervals;
An upper and lower branch part gap preventing plates which are respectively joined to the upper and lower inner sides of the pair of vertical plates to prevent the branch part from being opened;
A stress distribution ground extension plate joined with a curved surface having the same curvature as the upper arch surface of the pair of vertical plates;
The bottom surface of a certain section in the longitudinal direction from one end is covered with a pair of vertical plates with curved portions of the same curvature on the upper arch curved surface, and the other end is extended to the lower branch portion open prevention plate and joined to the pair of vertical plates. A lower cover plate;
A loading plate which is in sliding contact with the curved portion of the loading plate cover plate and at the same time secondly adjustable in a predetermined angle allowed by the opening formed in the curved portion;
A first angle adjustment stopper is further provided on the lower inner surface of the upper arch curved side of the pair of vertical plates so as to enable the secondary movement adjustment of the lower plate to form a plurality of first angle adjustment stoppers;
The lower plate,
A bottom plate top plate having a through hole formed in the center of the flat top surface;
A loading plate ground block having a ground curved surface in contact with the curved portion of the loading plate cover plate and installed on both bottom surfaces of the loading plate upper plate;
A hook rod connecting plate disposed in a direction perpendicular to the bottom plate ground block and fixedly coupled to the bottom of the top plate;
It is installed on the bottom of the hook rod connecting plate, characterized in that it comprises a loading rod hanger that is selectively hooked on any one of the plurality of angle stopper.
According to another suitable embodiment of the present invention,
A pair of vertical plates having an upper arch curved surface along a predetermined radius of curvature at intervals of a predetermined angle and disposed to face each other at regular intervals;
An upper and lower branch part gap preventing plates which are respectively joined to the upper and lower inner sides of the pair of vertical plates to prevent the branch part from being opened;
A stress distribution ground extension plate joined with a curved surface having the same curvature as the upper arch surface of the pair of vertical plates;
The bottom surface of a certain section in the longitudinal direction from one end is covered with a pair of vertical plates with curved portions of the same curvature on the upper arch curved surface, and the other end is extended to the lower branch portion open prevention plate and joined to the pair of vertical plates. A lower cover plate;
A loading plate which is in sliding contact with the curved portion of the loading plate cover plate and at the same time secondly adjustable in a predetermined angle allowed by the opening formed in the curved portion;
A plurality of second angle adjustment stoppers are further provided on the inner surface of the stress distribution ground extension plate to allow secondary movement adjustment of the loading plate at predetermined intervals within a predetermined angle;
The lower plate,
A bottom plate top plate having a through hole formed in the center of the flat top surface;
A pair of loading board grounding blocks having a ground curved surface in contact with the curved portion of the loading board cover plate and installed on both bottom surfaces of the loading board top plate;
A lower plate stopping plate disposed at a right angle with the pair of lower plate grounding blocks and fixedly coupled to a bottom surface of the upper plate, and having locking jaws selectively fixed at both ends of the second angle adjusting stopper;
Each of the lower plate is installed on the bottom of the stopping plate is characterized in that it includes a loading guide rod which is guided along the bottom of the stress distribution ground expansion plate when moving the loading plate.

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In addition, the upper and lower portion of the gap preventive plate is characterized in that it is integrally joined to the stress distribution ground expansion plate to form an integral.

In addition, it is characterized in that the anti-buckling double stress distribution plate is attached to the inner surface of the pair of vertical plate in close proximity to the lower branch portion of the anti-plate.

In addition, the upper and lower branch plates are further attached to the top and bottom of the pair of vertical plates, respectively.

In addition, the local stress reinforcing material is further provided to prevent the stress concentration of the bent portion of the lower arch curved surface in the outer surface side angle adjustment area of the pair of vertical plates.

In addition, in order to separate and remove the anti-buckling stress distribution plate, the back plate cover plate is characterized in that the bent portion is bent downward to the upper position of the anti-buckling double stress distribution plate configured to be bent upward again.

Earth anchor bracket for angle adjustment according to the present invention is easy to move the position of the loading plate is possible to adjust the angle smoothly, the upper and lower points of the gap prevention plate, the stress distribution combined with the ground expansion plate, the number of the arch plate by the cover plate Stress concentration and buckling deformation of the straight plate can be suppressed to effectively prevent breakage and fracture.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1 is a perspective view of the angle anchor bracket for angle adjustment according to the first embodiment of the present invention.
2 is an exploded perspective view of part of FIG. 1;
3A is a front cross-sectional view of FIG. 1.
Figure 3b is an exemplary view showing a movement operation of the lower plate in Figure 3a.
FIG. 4A is a cross-sectional view of one side of FIG. 3A, in which the loading plate is fixed to the stopper.
Figure 4b is one side cross-sectional view of Figure 3b is an illustration of the loading plate is released to the stopper.
Figure 5 is a perspective view of the angle anchor bracket for angle adjustment according to the second embodiment of the present invention.
6 is an exploded perspective view of part of FIG. 5;
7A is a front cross-sectional view of FIG. 5.
Figure 7b is an exemplary view showing a movement operation of the lower plate in Figure 7a.
FIG. 8A is an exemplary cross-sectional view of one side of FIG. 7A in which the loading plate is fixed to the stopper.
FIG. 8B is a cross-sectional view of one side of FIG. 7B, in which the loading plate is released from the stopper; FIG.
Figure 9a is a state of use of the angle anchor bracket for angle adjustment according to the first embodiment of the present invention.
Figure 9b is a state of use of the angle anchor bracket for angle adjustment according to the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

≪ Embodiment 1 >

Earth anchor bracket 10A according to the first embodiment is provided with a pair of vertical plates (12, 12) installed side by side to face each other at regular intervals, as shown in Figs. The pair of vertical plates 12 and 12 are made of steel and have a constant thickness. The pair of vertical plates 12 and 12 have the same arch-like structure as a whole, and have a convex upper arch curved surface 121 along a predetermined radius of curvature R in a predetermined section of the upper portion. In addition, the pair of vertical plates 12 and 12 has a lower arch curved surface 122 at the lower portion. At this time, one top surface of the vertical plate (12, 12) is the top point and the other bottom surface is the bottom point.

The pair of vertical plates 12 and 12 are provided with upper and lower point gap preventing plates 14A and 14B, respectively. It is preferable that the upper branch portion preventing plate 14A is disposed close to the upper point and the lower branch portion preventing plate 14B is disposed near the lower point. The upper and lower branch opening preventing plates 14A and 14B may be flat in a plate shape or curved in order to increase the bonding area with the vertical plates 12 and 12 as in the present embodiment. The upper and lower branch opening prevention plates 14A and 14B are made of steel having a thickness smaller than that of the vertical plate 12. The upper and lower branch opening preventing plates 14A and 14B are arranged such that convex curved surfaces appear in opposite directions of the respective points, but the present invention is not limited to the arrangement direction. The upper and lower branch opening preventing plates 14A and 14B are joined to the pair of vertical plates 12 and 12 by welding, but may be installed using bolts.

The pair of vertical plates 12 and 12 are provided with stress distribution and ground extension plates 16 and 16, respectively. The stress distribution ground extension plates 16 and 16 are made of steel. The stress distribution ground extension plates 16 and 16 distribute the high load stresses received from the loading plate 20 and increase the ground area with the loading plate 20 by increasing the thickness of the vertical plates 12 and 12. The stress distribution ground extension plates 16 and 16 have an arch shape having a ground extension plate curved portion 161 having the same radius of curvature as the curved portion of the vertical plate 12. In addition, the stress distribution ground extension plates 16 and 16 have an arc-shaped loading plate moving guide surface 162 on the opposite side of the curved portion 161. The stress distribution ground extension plates 16 and 16 are joined to a pair of vertical plates 12 and 12 by welding, but may be installed through bolts.

A base plate cover plate 18 is provided on the pair of vertical plates 12 and 12. The loading plate cover plate 18 is in contact with the loading plate 20 to be described later together with the function of the upper cover of the vertical plates 12 and 12 to smoothly guide the positional movement of the loading plate 20. The base plate cover plate 18 is made of steel. The bottom plate cover plate 18 has a thickness equal to or smaller than that of the vertical plate 12. The lower plate cover plate 18 is covered with a curved portion 181 of equal curvature on the upper arch curved surface 121 of the pair of vertical plates 12 and 12, and then the other section is opened at the lower point portion. It has the structure extended to the prevention plate 14B in linear form. The curved portion 181 is formed with a through opening 182 that enables the movement of the loading plate 20. The lower cover plate 18 is welded to the vertical plates 12 and 12, but may be installed by bolts.

3A and 3B, a first angle control stopper 22 is provided to secure the fixing after the position movement of the loading plate 20. The first angle adjustment stopper 22 is installed at a predetermined angle on the lower inner surface of the upper arch curved surface 121 side of the vertical plates 12 and 12 to form a plurality of stoppers. In the present embodiment, a plurality of first angle stoppers 22 are arranged at equal intervals within a range of at least 20 degrees and up to 40 degrees with respect to the upper point surface of the earth anchor bracket. Therefore, the moving angle of the lower plate 20 can be made small or large according to the number of arrangements of the first angle adjusting stoppers 22. For example, if the first angle stopper 22 is configured with four, the lower plate 20 can be fixed at four positions at different positions. In the present embodiment, the first angle control stopper 22 is configured in the shape of a rod having a circular cross section, but is not limited to this cross-sectional shape, and may be a protrusion formed by protruding with a press.

The lower plate 20 is made of steel. The loading plate 20 has a loading plate upper plate 201 having a through hole 201a formed at the center of the flat upper surface, and a ground curved surface 202a contacting the curved portion 181 of the loading plate cover plate 18. Loading plate grounding blocks 202 and 202 disposed on both bottom surfaces of the upper plate 201, and hanger connecting plates 203 and 203 disposed on the bottom surface of the upper plate 201 and disposed at right angles to the loading grounding blocks 202 and 202, It is installed on the lower end of the hook rod connecting plate (203, 203) and consists of the lower plate hook rods (204,204) selectively hanged on any one of the plurality of angle stoppers (22). The lower plate hanger rods 204 and 204 may be integrated with the hook rod connecting plates 203 and 203 and may have a protrusion shape protruding in a circular or square shape.

An upper branch plate 11A and a lower branch plate 11B may be further attached to the upper and lower ends of the pair of vertical plates 12 and 12, respectively. The upper branch plate 11A and the lower branch plate 11B are utilized as surface points of the vertical plates 12 and 12. At this time, the lower point plate 11B has a hook shape in which the upper end is bent outward so as to be easily hooked on the strip 2 shown in FIG. 9.

On the other hand, the anti-buckling anti-buckling stress distribution plate 26 which is bonded to the inner surface of the pair of vertical plates 12 and 12 in close proximity to the lower branch portion preventing plate 145B may be further installed. The anti-buckling stress distribution plate 26 suppresses the force that the vertical plates 12 and 12 are deformed inward or outward.

In addition, the local stress reinforcing material (30, 30) may be further installed in the outer surface side angle adjustment area of the pair of vertical plates (12, 12). Local stress stiffeners (30, 30) are made of steel. The local stress stiffeners 30 and 30 prevent the stress from concentrating on the inflection portion of the lower arch curved surface 122 of the vertical plates 12 and 12.

The operation of the present embodiment thus configured will be described.

The earth anchor bracket 10A of the first embodiment is used in the anchoring method used for the stability of the slope or the retaining wall. In other words, after inserting high strength steel wire into the hole, grout is injected to fix the steel wire on the ground and used to stably support tens of tons of tensile load acting on the steel head.

FIG. 9A shows an example in which the earth anchor bracket 10A is installed on the strap 2 of the temporary structure 1 side. At this time, the lower point plate 11B is interviewed by the lower band, and the upper point plate 11A is interviewed by the upper band. 3A and 4A, when the lower plate hanger rod 204 is caught by the first angle control stopper 22 at the corresponding position, the lower plate 20 is restricted in movement. After that, there is a case where the position of the loading plate 20 needs to be moved according to the insertion angle of the steel wire 3. In this case, as shown in Figures 3b and 4b it is simply made by lifting the back plate 20 to move back to the desired position. At this time, when the lifting plate 20 is lifted, the lower plate hanger rods 204 and 204 are pulled out of the first angle adjusting stopper 22, and the lower plate 20 becomes movable, and the lower plate 20 is moved. After placing the lower plate 20, the position is fixed by another first angle control stopper 22 existing in the position moved again.

Therefore, the loading plate 20 in the present embodiment in the range of 20 to 40 degrees to adjust the position at intervals of 5 degrees secondary to correspond to the insertion angle of the steel wire (3) the curved portion of the lower plate cover plate 18 181) is stably fixed.

At this time, the loading plate 20 is subjected to a tensile load, and the load is transmitted to the vertical plates 12 and 12 through the loading plate cover plate 18. At this time, the stress spreading ground extension plate 16 distributes the load stress received by the vertical plates 12 and 12 and at the same time expands the ground plane with the loading plate 20 to concentrate stresses on the vertical plates 12 and 12. Suppression to prevent deformation and destruction.

In addition, the backing plate cover plate 18 further suppresses the stress concentration of the vertical plates 12 and 12 by repulsively absorbing and dissipating the instantaneous force generated when applying the pulling force to the steel wire 3 with elastic force.

In addition, the anti-buckling stress distribution plate 26 with respect to the pressure-pressing force of the back plate cover plate 18 to hold the force that the vertical plate (12, 12) is to deform inward or outward. Therefore, the vertical surfaces of the vertical plates 12 and 12 do not deform.

On the other hand, as shown in Figure 3b by bending the lower back plate 18, the bending portion 18a is bent upward again by giving the anti-buckling double stress distribution plate 26 can be removed.

Second Embodiment

The earth anchor bracket 10B according to the second embodiment shown in FIGS. 5 and 6 is configured by changing the position of the first angle adjusting stopper and the structure of the lower plate applied to the first embodiment. The first angle stopper whose position has been changed is denoted by the second angle control stopper 24, and the same parts as those in the first embodiment in the second embodiment will be described using the same reference numerals.

The second angle adjustment stopper 24 is installed on the inner surfaces of the stress distribution and ground extension plates 16 and 16. The second angle adjustment stopper 24 is provided at a predetermined interval within a predetermined angle and provided with a plurality of stoppers for the same angle as the first angle adjustment stopper. The second angle control stopper 24 is configured in the form of a protrusion projecting in a circular shape by pressing with a press, but is not limited to such a manufacturing method or form, it may be configured by installing a separate member individually.

The loading plate 20 is a loading plate upper plate 201 having a through hole 201a formed at the center of the flat upper surface as shown in FIGS. 6 and 8, and a ground curved surface 202a contacting the curved portion of the loading plate cover plate 18. And a pair of substrate grounding blocks 202 and 202 installed on both sides of the bottom surface of the substrate upper plate 201, and a pair of substrate grounding blocks 202 and 202 at right angles, and a second angle control stopper at both ends thereof. The lower plate locking plate 205 and 205 having locking jaws 205a and 205a selectively hooked to the 24 and the lower plate of the lower plate locking plate 205 and 205, respectively, are provided for stress distribution and ground extension plate when the lower plate 20 is moved. The lower plate guide rods 206 and 206 are moved along the bottom surface of the cylinder 16.

Therefore, when the lower plate 20 is to be moved for angle adjustment, the lower plate 20 as shown in FIG. 8B is caught in the second angle control stopper 24 as shown in FIG. 8A. When lifted up, the lowering plate stopping plate 205 and 205 side locking jaws 205a and 205a are out of the second angle adjusting stopper 24 and the lower plate 20 is able to move to a desired position. After moving, if the lower plate 20 is lowered again at that position, the locking angles 205a and 205a of the lower plate stopping plate 205 and 205 are fixed to the second angle adjusting stopper 24 to fix the angle adjusted position. . When the loading plate 20 is moved, the loading guide bars 206 and 206 are guided to the lower loading plate moving guide surface 162 of the stress distribution and ground extension plate 16. Therefore, the movement of the loading plate 20 is made smoothly.

The functions and actions of the members not described in the second embodiment are the same as in the first embodiment, and thus will be omitted. 9B illustrates a state of use of the earth anchor bracket 10B according to the second embodiment.

On the other hand, in the first and second embodiments, the upper and lower point gap preventing plates 14A and 14B are configured to be separated from the stress distribution ground extension plates 16 and 16, but the present invention prevents the upper and lower point gap spreading plates. The plates 14A and 14B may be used to be continuously bonded to the stress distribution ground extension plates 16 and 16 to form an integrated body.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

12: vertical plate
14A and 14B: Upper and Lower Branch Opening Plates
16: Stress distribution ground extension plate
18: back cover plate
20: Reload
201: Bottom plate
202: Grounding ground block
205: loading board
205a: jamming jaw
206: Shipping Guide Bar
22: first angle adjustment stopper
24: second angle adjustment stopper
26: anti-buckling stress distribution plate
30: Local stress stiffener

Claims (8)

delete A pair of vertical plates 12 and 12 having an upper arch curved surface along a predetermined radius of curvature at intervals of a predetermined angle and facing each other at regular intervals;
Upper and lower branch opening preventing plates 14A and 14B joined to upper and lower inner sides of the pair of vertical plates 12 and 12, respectively, to prevent opening of the branch portions;
(16, 16) having a curved surface having the same curvature as that of the upper arch curved surface of the pair of vertical plates (12, 12);
One end of the longitudinal section in the longitudinal direction from one end is covered with a pair of vertical plates 12 and 12 with curved portions 181 of the same curvature on the upper arch curved surface, and the other end of the lower branch portion anti-separation plate 14B. A lower plate cover plate 18 extending to and bonded to the pair of vertical plates 12 and 12;
It includes a lower plate 20 which is in sliding contact with the curved portion 181 of the lower plate cover plate 18 and at the same time secondly adjustable in a predetermined angle allowed by the opening 182 formed in the curved portion 181. and;
The first angle adjustment stopper 22 is formed on the lower inner surface of the upper arch curved side of the pair of vertical plates 12 and 12 at regular intervals so as to enable the secondary movement adjustment of the lower plate 20. Provided;
The load plate (20)
A load plate upper plate 201 having a through hole 201a formed at the center of a flat upper surface thereof;
Loading plate grounding blocks 202 and 202 provided on both sides of the bottom surface of the top plate 201 and having a ground curved surface in contact with the curved surface of the plate cover plate 18;
Hanging rod connecting plates (203, 203) disposed at right angles to the bottom plate ground blocks (202, 202) and fixedly coupled to the bottom of the bottom plate (201);
Earth anchor bracket for angle adjustment, characterized in that it is installed on the lower end of the hook rod connecting plate (203,203) and includes a lower plate hanger rods (204,204) selectively hanged on any one of the plurality of angle stoppers (22). A pair of vertical plates 12 and 12 having an upper arch curved surface along a predetermined radius of curvature at intervals of a predetermined angle and facing each other at regular intervals;
Upper and lower branch opening preventing plates 14A and 14B joined to upper and lower inner sides of the pair of vertical plates 12 and 12, respectively, to prevent opening of the branch portions;
(16, 16) having a curved surface having the same curvature as that of the upper arch curved surface of the pair of vertical plates (12, 12);
One end of the longitudinal section in the longitudinal direction from one end is covered with a pair of vertical plates 12 and 12 with curved portions 181 of the same curvature on the upper arch curved surface, and the other end of the lower branch portion anti-separation plate 14B. A lower plate cover plate 18 extending to and bonded to the pair of vertical plates 12 and 12;
It includes a lower plate 20 which is in sliding contact with the curved portion 181 of the lower plate cover plate 18 and at the same time secondly adjustable in a predetermined angle allowed by the opening 182 formed in the curved portion 181. and;
On the inner surface of the stress distribution ground expansion plates (16, 16) to enable the secondary movement control of the loading plate 20 is further provided with a plurality of second angle adjusting stoppers 24 installed at regular intervals within a predetermined angle;
The load plate (20)
A load plate upper plate 201 having a through hole 201a formed at the center of a flat upper surface thereof;
A pair of loading plate grounding blocks 202 and 202 having a ground curved surface in contact with the curved portion of the loading plate cover plate 18 and installed on both bottom surfaces of the loading plate upper plate 201;
Arranged at right angles with the pair of loading plate ground blocks 202 and 202 and fixedly coupled to the bottom surface of the upper plate 201, the locking jaws 205a and 205a selectively caught at both ends of the second angle adjustment stopper 24, respectively. A lower plate stopping plate (205, 205) having;
For the angle adjustment, characterized in that it comprises a lower plate guide rods (206, 206) which are respectively installed at the lower end of the lower plate stopping plate (205, 205) is moved along the bottom surface of the stress distribution ground expansion plate (16) during the movement of the lower plate 20 Earth anchor bracket. 4. The method according to claim 2 or 3,
Earth anchor bracket for angle adjustment, characterized in that the upper and lower points of the separation prevention plate (14A, 14B) is continuously joined to the stress distribution ground expansion plate (16, 16) to form an integrated. 4. The method according to claim 2 or 3,
Earth anchor bracket for angle adjustment, characterized in that the anti-buckling stress distribution plate 26 is further attached to the inner surface of the pair of vertical plates (12, 12) in close proximity to the lower branch portion preventing plate (14B). 4. The method according to claim 2 or 3,
Earth anchor bracket for angle adjustment, characterized in that the upper branch plate (11A) and the lower branch plate (11B) is further attached to the top and bottom of the pair of vertical plates (12, 12), respectively. 4. The method according to claim 2 or 3,
Earth anchor for angle adjustment, characterized in that the local stress stiffener (30, 30) is further provided to prevent the stress concentration of the bent portion of the lower arch curved surface in the angle adjustment area of the outer surface side of the pair of vertical plates (12, 12) Brackets. 6. The method of claim 5,
In order to separate and remove the anti-buckling stress distribution plate 26, the lower plate cover plate 18 includes a bent portion 18a that is bent downward at an upper position of the anti-buckling stress distribution plate 26 and again bent upward. Earth anchor bracket for angle adjustment.

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