KR20130005556A

KR20130005556A - Buckling restrained earth anchor bracket for angle control

Info

Publication number: KR20130005556A
Application number: KR1020110067026A
Authority: KR
Inventors: 김영호
Original assignee: 김영호
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2013-01-16

Abstract

PURPOSE: A bracket for an anti-buckling earth anchor is provided to improve compression strength although the thickness of steel plates is reduced. CONSTITUTION: A bracket for an anti-buckling earth anchor comprises a lower plate(12), an upper plate(14), a pair of side plates, a pair of reinforcing partition plates, a compression reinforcing unit, and a wedge positioning block(200). The lower plate has flat support portions(121) and a convex portion having a first through-hole. The upper plate has a second through-hole and is connected to at the end of the support portions to cover the lower plate. The pair of the side plates is installed between the lower and upper plates. The pair of reinforcing partition plates is arranged between the lower and upper plates and is installed around the through-hole. The compression reinforcing unit is installed in a space between the pair of reinforcing partition plates to increase compression strength so that buckling can be prevented.

Description

Buckling restrained earth anchor bracket for angle control}

The present invention relates to a bracket for earth anchors, in particular, it is easy to respond to changes in the installation angle of the earth anchor, to ensure the integral behavior of the plates constituting the earth anchor bracket, to prevent plate buckling and compressive strength A bracket for an anti-buckling earth anchor capable of improved angle adjustment.

In general, the earth anchor method is widely known as a method for preventing the earth wall from collapsing due to the ground earth pressure acting as the earth wall when forming the excavation hole according to the excavation work in the civil construction work.

In the conventional earth anchoring method, a strip of H beam is installed on the earth wall formed by the excavation hole, and then a hole is formed in the earth wall. Thereafter, the strand is inserted into the drilling hole and then grouted to fix the strand. At this time, a portion of the strand is exposed to a certain length in the drill hole. Then, the anchor anchor bracket is inserted into the strand, and then fixed to the band, and the strand is tensioned and fixed to the anchor anchor bracket to maintain the upright wall and resist earth pressure.

As such, the anchor anchor bracket has to withstand the tension of the stranded wire and the high load on the earth wall, thus requiring high compression pressure performance and rigidity.

Conventional earth anchor bracket includes a support plate that is opposed to the belt, a pair of side plates placed opposite to each other on both ends of the support plate, and an upper plate installed on the upper surface of the side plate. At this time, the upper plate forms a through hole to be inserted into the strand. In this way, the conventional anchor anchor bracket is manufactured by combining steel sheets in a triangular shape consisting of open sections, and thus, should have a sufficient thickness due to resistance to compressive strength and buckling stability.

Therefore, a thick steel plate is used as a whole to increase the overall weight of the earth anchor bracket. As a result, the worker is forced to insert dozens of earth anchor brackets, which must be installed on one earth wall, into the strand and to rest on the bands, which inevitably exposes them to safety accidents.

In addition, when a high load is applied to the bracket for earth anchors, buckling deformation occurs in the steel sheet, which causes a problem that the anchor introduction force is lowered.

In addition, since the inside of the pair of side plates is empty structure, the upper plate and the side plate is out of the integral behavior when the angle is introduced, so the accident during construction of the worker due to the sudden destruction that causes the problem of plate buckling occurs Sometimes.

In addition, the conventional anchor bracket for the earth is not inconvenient to be manufactured separately because there is no corresponding means according to the change of the angle of the earth anchor.

In Korea Registration No. 20-0372358, the earth anchor bracket that can adjust the insertion angle of the anchor body is presented. Patent document 1 is a side plate support bracket for an earth anchor comprising a pair of side plates and a pressure plate provided on the side plate so as to be perpendicular to the tension angle of the anchor body, the withdrawal hole is provided with the free field of the anchor body is withdrawn It characterized in that it comprises a pressure plate that can be slidably moved along the rail provided at the edge portion of the. However, Patent Document 1 has a problem in that it is difficult to maintain the angle adjustment because the shiatsu plate can be slidably moved in position, but there is no means for fixing it to a desired position. In Korean Patent No. 10-0760213 is presented an earth anchor bracket having a curved portion formed with a tooth. Patent document 2 is the two side plates in which the curved part which has a saw-tooth is formed and opposes each other; A connection member for connecting and fixing the both side plates; And acupressure means supported by the both side plates, the holding jaw engaging with the teeth of the both side plates and a through part for drawing out the free field of the anchor body. Therefore, it is possible to change the position of the shiatsu means with the toothed teeth and to adjust the position corresponding to the puncture position for the insertion of the anchor body, the connecting member is described as increasing the internal pressure. However, Patent Literature 2 has a problem in that it has a limit only in connection members to increase the internal pressure.

Therefore, the present invention was made in view of the above circumstances, and it is easy to respond to changes in the installation angle of the earth anchor, to secure the integral behavior of the plates constituting the earth anchor bracket, and prevent the plate buckling It is an object of the present invention to provide a bracket for an anti-buckling earth anchor that can improve the safety and anchoring force, and can adjust the angle to improve the compressive strength even if the thickness of the steel sheet is reduced.

According to a suitable embodiment of the present invention,

A lower plate including a flat support portion at both ends and a convex portion having a convex shape in a centrally upward direction from the inside of both support portions and having a first through hole formed therein;

A top plate formed at one position with a second through hole having the same diameter on the same center line as the first through hole, and connected to the ends of both supporting portions to cover the lower plate;

Side plates respectively coupled to both side surfaces between the lower plate and the upper plate;

A pair of reinforcing plates disposed between the lower plate and the upper plate and installed around the center line of the through hole;

Compression reinforcing means installed to increase compressive strength in a space formed between the pair of reinforcing plates;

Wedge position adjustment block is coupled to the upper inclined surface of the upper plate in which the second through-hole is located in a tooth or wave form adjustable position.

Preferably, the teeth or corrugations are formed along the radius of curvature around the installation hole of the strand.

According to another suitable embodiment of the present invention,

The compression reinforcing means includes: a core having an inner diameter equal to the diameter of the first through hole and installed between the first through hole and the second through hole;

Mortar is filled in the space surrounded by the outer peripheral surface of the core and the pair of reinforcing plate and side plate.

According to another suitable embodiment of the present invention,

The compression reinforcing means includes: an outer steel pipe having an outer diameter of a size smaller than the gap between the pair of reinforcing plates;

An inner steel pipe inserted into the outer steel pipe and configured to have an inner diameter equal to a diameter of the first through hole;

Characterized by cutting a predetermined length of the cylindrical length member made of a mortar filled between the inner steel pipe and the outer steel pipe.

According to another suitable embodiment of the present invention,

The interior space formed by the pair of reinforcing plate and the upper, lower and side plates is characterized in that the lightweight concrete is further filled.

According to the present invention, the upper and lower plates, the side plates, and the like, are formed as closed box-shaped cross sections, and the rigidity is increased by the mortar layer and the lightweight concrete layer therein, so that displacement of the earth anchor bracket is small, and the earth anchor bracket even at high loads. Since plate buckling is suppressed, it can be comprised with a thin steel plate.

In addition, the weight of the overall weight is reduced, the steel sheet manufacturing cost is reduced, and the operator is easy to handle and install.

In addition, by combining the mortar layer or lightweight concrete layer, the plates constituting the earth anchor bracket are manufactured in the form of a box of a closed cross section to induce integral behavior, thereby reducing stress concentration. Therefore, the earth anchor bracket has no plate buckling or deformation and thus structural safety is improved.

The following drawings, which are attached in the present specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
Figure 1a is a perspective view of a bracket for preventing buckling earth anchors capable of adjusting the angle according to the first embodiment of the present invention.
FIG. 1B illustrates that the waveform shown in FIG. 1A is formed at a constant radius of curvature. FIG.
FIG. 1C is a variation of FIG. 1B showing that the tooth is formed at a constant radius of curvature. FIG.
2A is an exploded perspective view of FIG. 1.
2B is a bottom perspective view of one embodiment of a wedge position adjusting block applied to the present invention.
Figure 2c is a bottom perspective view according to another form of the wedge position adjustment block applied to the present invention.
Figure 3 is a state of use of the buckling prevention earth anchor bracket capable of adjusting the angle according to the first embodiment of the present invention.
Figure 4 is a state of use of the buckling prevention earth anchor bracket capable of adjusting the angle according to the second embodiment of the present invention.
Figure 5 is a state of use of the buckling preventing earth anchor bracket capable of adjusting the angle according to the third embodiment of the present invention.
Figure 6 is a state of use of the buckling preventing earth anchor bracket capable of adjusting the angle according to the fourth embodiment of the present invention.
7 is a perspective view showing a length reinforcing member of the compression reinforcing means applied to the second and fourth embodiments 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.

As shown in Figure 1a to Figure 3, the angle adjustment bracket for buckling prevention earth anchor of the present invention has an arcuate shape as a whole. The buckling-resistant earth anchor bracket 10 that can adjust the angle includes a lower plate 12, an upper plate 14, a pair of side plates 16, and a pair of reinforcing plate plates 18.

The lower plate 12 is formed by molding a steel plate having a constant thickness. The lower plate 12 is provided with a flat support portion 121 at both ends and a convex portion 122 having a convex shape at the inner side of the both support portions 121 and having a first through hole 123 formed therein. . The convex portion 122 includes a curvature portion 122a having a constant radius of curvature R and a flat inclined portion 122b having a constant upward angle θ at the support portion 121.

The lower plate 12 may further include a hook 124 for hooking the anti-buckling earth anchor bracket 10 that can be adjusted to the belt length 2 used as a cross member of the temporary structure 1. At this time, the hook 124 has a latching groove 124a is bent downward.

The upper plate 14 is produced by molding a steel plate having a constant thickness. The upper plate 14 has a second through hole 141 having the same diameter on the same center line as the first through hole 123 in one place, and is connected to the ends of both supporting portions 121, the lower plate 12 The connection is installed so as to cover. In this case, the upper plate 14 and the lower plate 12 may be connected by welding or may be fastened by bolts or rivets by forming flanges at both ends of the upper plate 14. The upper plate 14 has two upper and lower inclined surfaces 14a and 14b constituting a curvature by a straight line or a curved inclined plane. The second through hole 141 is formed in the upper inclined surface 14a. At this time, the upper inclined surface 14a forms a vertical plane with respect to the center line of the first through hole 123.

The upper inclined surface 14a is configured in a waveform or tooth shape for position movement and fixing of the wedge position adjusting block 200 to be described later. Here, the waveform is a shape in which a curved convex valley and a mountain are continuous, and the tooth shape is a shape in which teeth appear in a mountain shape, a ladder shape, a square, etc. at a predetermined pitch. At this time, the waveform or tooth is preferably formed along the curvature radius (R) around the installation hole (1a) of the strand (5). That is, as shown in Figs. 1B and 1C, the waveforms and teeth are formed along the radius of curvature R around the installation hole 1a of the strand 5. Here, a part of the upper plate 14 may be configured after the metal plate is processed to show a wave or a tooth to form a wave and a tooth.

The pair of side plates 16 face each other and are respectively installed on both side surfaces between the lower plate 12 and the upper plate 14. The pair of side plates 16 are manufactured by molding a steel plate having a constant thickness. The pair of side plates 16 are configured such that their bottom faces coincide with the top shape of the bottom plate 12 and their top faces coincide with the bottom shape of the top plate 14. The pair of side plates 16 are welded to the lower plate 12 and the upper plate 14 by welding.

The pair of reinforcing plate 18 is made of a steel plate having a constant thickness. A pair of reinforcing plate 18 is disposed between the lower plate 12 and the upper plate 14 is installed around the center line of the through hole (141a). At this time, the pair of reinforcing plate 18 is positioned perpendicular to the side plate (16).

In the space formed between the pair of reinforcing plate 18, compression reinforcing means for increasing the compressive strength of the earth anchor bracket 10 to prevent buckling is provided.

The compression reinforcing means applied to the present invention may be implemented in various forms. Hereinafter, various preferred embodiments will be described.

The compression reinforcing means of the first embodiment has an inner diameter equal to the diameter of the first through hole 123 as shown in FIGS. 2 and 3 and has a core between the first through hole 123 and the second through hole 141. 20 is provided, and the mortar 22 is filled in the box-shaped space enclosed by the outer peripheral surface of the core 20, and the pair of reinforcing plate 18 and the side plate 16.

Compression reinforcing means of the second embodiment, the outer steel pipe 32 having an outer diameter of a smaller size than the gap between the pair of reinforcing plate 18, as shown in Figure 7, and the inner diameter of the outer steel pipe 32 The length of the cylindrical reinforcement member consisting of a mortar (36) filled between the inner steel pipe 34, the inner steel pipe 34 and the outer steel pipe 32 is configured to have the same size as the diameter of the first through hole (123) Cut to length is installed between the pair of reinforcing plate 18 as shown in FIG. In this case, the cutting length may be an opposed gap between the curvature 122a and the inclined surface 14a.

As shown in FIG. 5, the compression reinforcing means of the third embodiment adds lightweight concrete 40 in addition to the first embodiment, and the compression reinforcing means of the fourth embodiment, as shown in FIG. An additional lightweight concrete 40 is added to the second embodiment.

At this time, the lightweight concrete 40 is filled in the inner box space formed by a pair of reinforcing plate 18 and the upper and lower plates 12 and 14 and the side plate 16. Preferably the lightweight concrete 40 is used having a compressive strength of 80kg / cm ² or more. Here, the lightweight concrete 40 may be light weight concrete by weighting the aggregates or lightweight concrete by putting a large amount of air or foaming agent into the concrete.

On the other hand, the wedge position adjustment block 200 which is coupled to the teeth in the form of a tooth shape or waveform is adjusted to the upper inclined surface (14a) of the upper plate 14, the second through hole 141 is provided. Accordingly, the wedge position adjusting block 200 is configured with teeth 201 (or waveforms) of the same or similar shape corresponding to each other so as to mesh with teeth or waveforms formed on the upper inclined surface 14a at the bottom. At this time, the teeth 201 (or waveform) is preferably formed along the same radius of curvature (R). The teeth 201 may be individually manufactured and welded or may be manufactured integrally with the positioning block 200. The wedge positioning block 200 is formed with a wedge engaging hole 202 into which the wedge 6 is inserted. At this time, the position adjustment block 200 is configured to be shorter than the section of the tooth formed on the bottom surface of the tooth formed on the inclined surface (14a). The number of teeth formed on the bottom surface of the position adjusting block 200 is preferably three.

The use state and operation of this embodiment configured as described above will be described.

First, after forming a perforation hole in the earth wall (soil barrier), as shown in FIG. 3, a plurality of strands 5 are inserted and grouted to fix the strands firmly inside the earth walls.

Next, a strip 2 having an H cross section is installed on the temporary structure 1 that resists upright and earth pressure, and the brackets 10 for earth anchors are attached to two strips 2 adjacent to each other up and down. In this case, the strand 5 passes through the first and second through holes 123 and 141 of the earth anchor bracket 10 and is exposed by a predetermined length from the upper plate 14. At this time, the earth anchor bracket 10 can be easily mounted because the engaging piece is caught on the belt (2).

Next, the strand 5 is tensioned and tensioned to secure it through the wedge 6. At this time, the wedge 6 is in a state fixed in the wedge engaging hole 202 of the wedge position adjusting block 200. In this case, the tensile force applied to the strand 5 is applied to the entire earth anchor bracket 10, and the earth anchor bracket 10 is subjected to compression resistance. In particular, the compressive resistance is not caused by plate buckling even under high loads by the pair of reinforcing plates 18 and the compression reinforcing means located between the reinforcing plates 18.

That is, when the compressive reinforcing means of the first and second embodiments are applied, the high load bearing pressure is compressively resisted by the mortar 22, so that the plate buckling of the earth anchor bracket 10 is suppressed.

In addition, when the compression reinforcing means of the third and fourth embodiments are applied, the plate buckling of the earth anchor bracket 10 is further inhibited by the compression resistance of the lightweight concrete 40.

On the other hand, when the support angle of the earth anchor is changed (that is, when the installation angle of the strand 5) is changed, the wedge positioning block 200 is toothed (or corrugated) on the upper inclined surface 14a of the upper plate 14. The desired angle can be set by changing the relationship of the engagement position between Position movement of the wedge position adjustment block 200 is made in the state that there is no tension force on the strand (5).

Thus, in the present invention, the rigidity is increased by the mortar layer 22 and the light weight concrete layer 40 so that the displacement of the earth anchor bracket 10 is small, and the plate buckling of the earth anchor bracket 10 is carried out even under high load. Since it is suppressed, it becomes possible to comprise a thin steel plate. For example, if 12 mm steel sheet is used in the present invention, the earth anchor bracket 10 may be manufactured with a 9 mm steel sheet, thereby reducing the overall weight.

In addition, the plate material constituting the earth anchor bracket 10 by the combined configuration of the mortar layer 22 or the light concrete layer 40 is induced integral behavior, so that the stress concentration is solved, the earth anchor bracket 10 The structural safety is improved without being deformed.

In addition, the angle of the earth anchor can be adjusted to provide excellent installation responsiveness and improve the bearing capacity of the earth wall.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is only limited by the scope of the appended claims.

12: bottom plate
122: convex
123: first through hole
14: top panel
141: through the second
16: side panel
18: reinforcement plate
20: core
22: mortar
40: lightweight concrete

Claims

In the bracket for installing the wedge 6 for fixing the strand 5 to the strip 2,
A lower plate 12 including a flat support portion 121 at both ends, and a convex portion 122 having a convex shape at the inner side of both of the support portions 121 and having a convex shape at the center thereof and having a first through hole 123 formed therein; ;
The second through hole 141 is formed in the same diameter on the same center line as the first through hole 123 and is connected to the ends of both supporting portions 121 to cover the lower plate 12. An upper plate 14 installed;
Side plates (16) respectively coupled to both sides between the lower plate (12) and the upper plate (14);
A pair of reinforcing plates 18 disposed between the lower plate 12 and the upper plate 14 and installed around the center line of the through hole 141a;
Compression reinforcing means installed to increase compressive strength in a space formed between the pair of reinforcing plate plates 18;
The angle adjustment is possible, characterized in that the wedge position adjustment block 200 is coupled to the upper inclined surface (14a) of the upper plate 14, the second through hole 141 is located in the form of teeth or waveform adjustable Bracket for anti-buckling earth anchors.

The method of claim 1,
The tooth shape or waveform is angle-adjustable anti-buckling bracket for the bracket, characterized in that formed along the radius of curvature (R) centered on the installation hole of the strand (5).

The method of claim 1,
The compression reinforcing means,
A core 20 having an inner diameter equal to the diameter of the first through hole 123 and installed between the first through hole 123 and the second through hole 141;
Adjustable angle buckling earth anchor bracket, characterized in that the mortar 22 is filled in the space surrounded by the outer peripheral surface of the core 20 and the pair of reinforcing plate 18 and the side plate 16 .

The method of claim 1,
The compression reinforcing means,
An outer steel pipe (32) having an outer diameter smaller than the gap between the pair of reinforcing plate plates (18);
An inner steel pipe 34 inserted into the outer steel pipe 32 and configured to have an inner diameter equal to a diameter of the first through hole 123;
Adjustable angle buckling prevention earth anchor bracket, characterized in that configured by cutting a predetermined length of the cylindrical length member consisting of; mortar (36) filled between the inner steel pipe 34 and the outer steel pipe (32).

6. The method according to any one of claims 2 to 5,
Adjustable angle anti-buckling earth, characterized in that the lightweight concrete 40 is further filled in the inner space formed by the pair of reinforcing plate 18, the upper, lower plates 12, 14 and the side plate 16 Anchor bracket.