KR101019013B1 - Compression type ground anchor - Google Patents

Abstract

The present invention relates to a compression-type permanent anchor, in particular, in the anchor having a lower body on each PC strand, the lower body is coupled to the anchor hole having an outer diameter larger than the longest distance between the center of the lower body, anchoring grout and anchoring force It relates to a compression type permanent anchor to maximize the.

The present invention provides a tendon composed of a plurality of PI pipes and PC strands, an upper fixing means provided for tensioning one end of the PC strands and fixing them to the ground surface side, and a PC strand as a hollow tube of steel while being located at the bottom of the drilling diameter. In the compression-type permanent anchor comprising a lower body which is accommodated in each one and the outer surface has an uneven portion and the lower fixing means which is located on the lower end of the lower body and provided at the other end of the PC strand, A plurality of through holes 1301 are formed so as to maintain a distance between the (1101, 1102) or the PC strands (1201, 1202, 1203) and to be inserted into and fixed to the lower ends of the lower body (1101, 1102). On the other hand, the first acupressure sphere 1300 having an outer diameter greater than the longest distance between the center of the lower body, and the lower body (1101, 1102) or the PC strand (1201, 1202, 1203) A plurality of through-holes 1401 are formed to hold the gap and to be inserted into and fixed to the upper ends of the lower body 1101 and 1102 in the axial direction, and have a second outer diameter larger than the longest distance between the centers of the lower body. Acupressure ball 1400 is characterized in that it comprises.

Compression, anchor, lower body, shiatsu

Description

Compression permanent anchor {COMPRESSION TYPE GROUND ANCHOR}

The present invention relates to a compression type permanent anchor provided with a load bearing body in each PC strand, and more particularly, in an anchor having a load bearing body in each PC strand, the inner diameter of the load body is larger than the longest distance between the centers of the lower body bodies. It relates to a compression type permanent anchor to maximize the grout and anchoring force of the anchor by combining the acupressure ball having a.

In general, permanent anchors are used to prevent the rise of structures caused by groundwater, collapse of incised slopes, and fall of retaining walls during construction and civil works. Here, the permanent anchor is installed after being bored in the ground and is composed of the anchor head of the ground surface, the anchor body of the ground side and the tendon connecting the anchor head and the anchor body to displace the tensile force of the ground surface toward the ground.

The permanent anchor has generally used a tension or compression type anchor when divided into the anchoring type for the grout of the tension member. Here, the tension type is provided to have a tendon anchorage to which the tension member and the grout are directly attached, while the tension is concentrated at the top of the tendon anchorage when the anchor head is tensioned. The grout of the tendon anchorage site where the tensile stress is concentrated also receives a concentrated tensile force at the same time, but the grout, which is vulnerable to the tensile stress, has a disadvantage in that cracking occurs. In addition, the compression type, the tension member is a free length of the full length and the front end includes a fixing means for fixing the tension member, the inner body having a hollow so as to receive the tension member inside is located on the upper portion of the fixing means The structure is in close contact with each other so as not to leave the fixing means, and the grout does not have a surface directly attached to the tension member so that the anchoring force is secured by the attachment force between the lower body and the grout.

However, in order to resist the tensile force in the anchor head with the attachment force to the grout as described above, the diameter and length of the inner body are increased, leading to increased manufacturing cost and expense, and difficult to handle, resulting in poor construction properties in the field. There was a problem raising.

The present invention is to solve the above problems, in the anchor having a lower body in each of the PC strand, the lower body to combine acupressure sphere having an outer diameter greater than the longest distance between the center of the lower body body anchoring grout and anchoring force The purpose is to provide a compression type permanent anchor to maximize the pressure.

It is an object of the present invention to provide a compression type permanent anchor to improve workability.

Compression-type permanent anchor according to the present invention is a tendon consisting of a plurality of PI pipes and PC strands, the upper fixing means provided for tensioning one end of the PC strands to be fixed to the ground surface side, the steel material while being located in the lower portion of the drilling diameter Each of the PC strands as a hollow tube of the PC strand is received one by one inside and the outer surface includes a lower fixing means and a lower fixing means provided on the other end of the PC strand is located in the lower portion of the lower body, A first acupressure port formed to maintain a distance between the lower body or the PC strand and having a plurality of through holes formed in the lower end of the lower body to be fixed in the axial direction and having an outer diameter larger than the longest distance between the centers of the lower body; And is formed to maintain the spacing of the load body or the PC strand and the image of the load body Characterized in that a second pressure port having the other hand, a larger outer diameter than the maximum distance between the center of the lower body in which a plurality of through-holes formed so as to be fixed is inserted in the axial direction to an end.

Compression-type permanent anchor according to the present invention, the lower end is inserted into the second acupressure sphere fixed to the body, and formed to maintain the interval between the lower body or the PC strands and the axial direction at the upper end of the lower body A plurality of through-holes are formed to be inserted into and fixed to each other, and further include a third acupressure port having an outer diameter larger than the longest distance between the centers of the lower body.

The compression type permanent anchor according to the present invention is characterized in that the PI pipe is installed to receive the PC strand inwards from the upper part of the inner body to the anchor head.

The compression type permanent anchor according to the present invention is characterized in that the PI pipe is installed to receive the PC strand inwards from the lower body to the anchor head.

In the compression-type permanent anchor according to the present invention, the lower body and the first, second, and third pressure spheres are fixed by fastening means, and the lower fixing means is fastened to be in close contact with the first pressure hole installed under the lower body. It characterized in that it comprises a coupling means for coupling to the means.

In the compression-type permanent anchor according to the present invention, one surface of the acupressure tool is supported and fixed by the convex portion at one end of the uneven portion formed on the outer side of the inner body, and the other surface of the first, second and third acupressure holes is fixed. Characterized in that the fastening means is fastened to the screw portion formed in the lower body.

In the compression type permanent anchor according to the present invention, a portion where the lower surface and the lower side surface of the first, second and third acupressure holes meet has a curved surface.

Compression-type permanent anchor according to the invention, the 1,2,3 acupressure sphere is characterized in that the grout moving portion is formed so that the grout injected into the hole diameter can move.

Compression-type permanent anchor according to the present invention is characterized in that it further comprises a heat-shrink tube for connecting the pipe pipe for receiving the upper part of the inner body and the PC strand inside.

As described above, according to the compression-type permanent anchor of the present invention, the outer diameter of the drilling diameter can be reduced, so that the environmental damage due to the ground drilling can be minimized, and the environmental pollution can be minimized by reducing the amount of grout filled in the drilling diameter. have.

In addition, according to the compression-type permanent anchor of the present invention, it is possible to form the anchor with a shorter length and thinner than the conventional compression anchors to reduce the weight of the anchor, in particular, the anchor and grout of the conventional compression anchor The fixing force of the wand depends on the attachment force between the lower body and the grout, which increases the fixing force by increasing the bearing pressure of the grout due to the provision of the acupressure tool, so that the length of the lower body can be shortened and more secure. There is.

In addition, according to the compression-type permanent anchor of the present invention, the weight is reduced when the length of the lower body is reduced, since the raw material costs can be reduced, manufacturing cost can be reduced, and workability can be improved to reduce the construction cost.

Hereinafter, a compression type permanent anchor according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic cross-sectional view showing a friction type compression anchor according to an embodiment of the present invention.

In adding reference numerals to the components of the drawings, the same components, even if displayed on the other drawings to have the same reference numerals as possible, it is known that it may unnecessarily obscure the subject matter of the present invention Detailed description of functions and configurations will be omitted.

In the compression type permanent anchor according to the present invention, a tendon composed of a plurality of PI pipes 120 and PC strands 1201, 1202 and 1203 shown in FIG. 1 and one end portion of the PC strands 1201, 1202 and 1203 are tensioned. Upper fixing means (not shown) provided for fixing to the ground surface side, and the lower body 1101 and 1102 located at the lower part of the perforation diameter and receiving the PC strands one by one as a hollow tube of steel, respectively, and having an uneven portion on the outer surface thereof. 1103 and a lower fixing means 130 provided at the other end of the PC strand while located below the lower body.

In addition, the compression-type permanent anchor of the present invention, as shown in Figure 1, is formed to maintain the interval between the lower body (1101, 1102) or the PC strand (1201, 1202, 1203) and the lower body (1101, A plurality of through holes 1301 are formed in the lower end of the 1102 to be axially fitted and fixed, while the first pressure port 1300 having an outer diameter larger than the longest distance between the centers of the lower body and the lower body 1101. 1102 or the PC strands 1201, 1202, and 1203 are formed to maintain a spacing, and a plurality of through holes 1401 are formed so as to be axially fitted to the upper ends of the lower body 1101 and 1102, It includes a second chiropractor 1400 having an outer diameter larger than the longest distance between the center of the lower body.

Therefore, when the grout is supplied in a state in which the first and second acupressure holes 1300 and 1400 fixed to the lower and upper portions of the lower body 1101 and 1102 are seated in the hole diameter, the first acupressure hole ( Since the 1300 and the second acupressure hole 1400 are larger than the diameters of the lower load bodies 1101 and 1102, the frictional force that resists the tensile force in the anchor head is increased, so that the fixation can be performed even when the diameter of the lower load body is small and the length is short. As a result, manufacturing costs and expenses can be reduced to reduce construction costs.

Of course, since the outer diameter of the hole diameter can be reduced, it is possible to minimize environmental damage due to ground drilling, and to reduce the amount of grout filled in the hole diameter, thereby minimizing environmental pollution.

In addition, the compression type permanent anchor length of the present invention is able to form an anchor with a short and thin thickness of the anchorage to reduce the weight of the anchor, in particular, the anchoring force of the anchor and the grout of the conventional compression anchor anchors the inner body and grout It is possible to improve safety while increasing the anchoring force by increasing the bearing pressure of the grout due to the provision of the acupressure tool, which is dependent on the attachment force of the wand.

In addition, when the length of the load-bearing body (1101, 1102) is reduced, the weight is reduced, lowering the raw material cost can reduce the manufacturing cost, it is possible to reduce the construction cost by improving the construction properties.

The lower end portion 1103 may be further provided with a lower end portion 1103 inserted into and fixed to the second acupressure port 1400.

In addition, a plurality of through holes 1501 are formed to keep the gap between the lower body 1103 or the PC strands 1201 and 1202 and to be axially fitted to an upper end of the lower body 1103. The apparatus may further include a third chiropractor 1500 having an outer diameter greater than the longest distance between the centers of the lower bodies 1101, 1102 and 1103.

Therefore, when the fixing force is insufficient to the load bearing body 1101 and 1102 and the first and second acupressure holes 1300 and 1400, the fixing force may be improved by the added load bearing body 1103. In addition, the third pressure port 1500 installed at the upper portion of the lower body 1103 further improves the fixing force by further increasing the bearing pressure of the grout, thereby making it possible to further shorten the length of the lower body and achieve safety. .

Meanwhile, the through holes 1301, 1401, and 1501 of the first, second, and third acupressure holes 1300, 1400, and 1500 are equal to or greater than the number of internal bodies that are crossed in front view, as shown in FIG. 4. Through holes 1301, 1401, 1501 are formed. The through holes 1301, 1401, and 1501 are formed to accommodate end portions of the inner body. The through hole formed in one of the acupressure holes is formed to be point symmetrical with respect to the center of the acupressure hole when the acupressure sphere is divided into two equally on the plane.

And the PI pipe 120 (PE pipe) surrounding the PC strands (1201, 1202, 1203; PC strand) is the PC strands (1201, 1202) from the upper portion of the lower body (1101, 1102, 1103) to the anchor head It is installed to accommodate 1203 inside.

Accordingly, the PC strands 1201, 1202, and 1203 (PC strands) form a double protective film by the PE pipes 120 (PE pipes) and the load bearings 1101, 1102, 1103.

In addition, as shown in FIG. 2, the PPI pipe 120 may be installed to receive the PC strands 1201, 1202, 1203 from the lower portion of the lower body 1101, 1102, 1103 to the anchor head. Can be.

Therefore, the PC strands 1201, 1202, 1203 (PC strands) of the portions where the inner bodies 1101, 1102, 1103 are installed are doubled by the PE pipes 120 and the lower bodies 1101, 1102, 1103. A protective film is formed.

On the other hand, when a part or the entire length of the PC strand is coated with a PI pipe, the spacer member which is an elastic body may be fitted between the PI pipe and the inner body to prevent the sealing and the tilt of the PI pipe.

In addition, the compression-type permanent anchor of the present invention, as shown in Figures 1 and 2, the fixing body of the lower body (1101, 1102, 1103) and the first, second, third pressure port (1300, 1400, 1500) is a screw It is made of a fastening means 1600 is formed.

On the other hand, the lower fixing means 130 is fastening means 1600 is installed in close contact with the first, second, third pressure sphere (1300, 1400, 1500) installed in the lower body 1101, 1102, 1103 in the present embodiment Is fixed to the screw formed on the outer circumferential surface of the).

In addition, the lower fixing means 130 is fixed to the cap member fastened to the screw formed on the outer peripheral surface of the fastening means 1600, and the PC strands 1201, 1202, 1203; PC stranded wire protruding toward the center of the fastening means It includes a fixed grip.

In addition, when the lower body (1101,1102,1103) and the first, second, third pressure sphere (1300, 1400, 1500) is described in more detail, the lower body (1101, 1102, 1103) is the outer One surface of the first, second and third acupressure holes 1300, 1400, and 1500 is supported and fixed by one end of the uneven parts 1101a, 1102a, and 1103a formed in the first, second, and third acupressure holes ( The other surfaces of the 1300, 1400 and 1500 are fixed by the fastening means 1600 which are fastened to the screw portions 1101b, 1102b and 1103b formed at the ends of the lower body 1101, 1102 and 1103.

Therefore, preventing the first, second, and third pressure spheres 1300, 1400, and 1500 from moving in the axial direction is an uneven portion 1101a, 1102a, 1103a formed at one end of the lower body 1101, 1102, 1103. ) And the threaded portions 1101b, 1102b, and 1103b formed at one end of the lower body 1101, 1102, and 1103.

As shown in FIG. 3, the first and second and third acupressure holes 1300, 1400, and 1500 where the lower and the side portions of the lower surface meet the curved portion 1303, 1403, 1503 are formed, the first When the sides of the 2,3 acupressure spheres (1300,1400,1500) are curved, the frictional force can be reduced when the anchor is inserted into the hole diameter.

On the other hand, the upper surface of the 1,2,3 acupressure port (1300,1400,1500) is formed of a convex curved or trapezoidal surface to be formed in a structure that can apply the ground pressure to the perforated ground while ensuring the ground pressure with the grout Can be. In addition, the 1,2,3 pressure port (1300,1400,1500) is to ensure the maximum pressure with the grout when the upper surface is formed in a flat.

As shown in Figure 5, the 1,2,3 acupressure spheres (1300,1400,1500) is formed with grout moving parts (1302,1402,1502) provided in a point-symmetrical with respect to the center, grout injected into the hole diameter Can move up and down. In addition, although the grout moving parts 1302, 1402, and 1502 are configured in the form of holes in the present invention, the sides of the 1,2 and 3 acupressure spheres 1300, 1400, and 1500 may be symmetrically cut.

In addition, the inner body 1101 including a heat shrink tube 1700 connecting the upper portion of the lower body (1101, 1102, 1103) and the pipe (120) for receiving the PC strands (1201, 1202, 1203) inside. It is to prevent the grout from flowing between the ends of the 1110, 1103 and the pipe pipe 120.

In this case, the inner body 1101, 1102, 1103 may be formed to form a pair of two or more in the axial direction of the hole diameter. A set of loading bodies have the same material and shape, and are installed in parallel with each other, and the upper portions of the loading bodies are disposed in the same distance to the upper fixing means along the center of the loading bodies. In addition, a set of load-bearing bodies are arranged to be point-symmetrical with respect to the center of the aperture diameter (anchor hole) when the cross section is divided into two. In this way, a set of load-bearing bodies can be subjected to uniform stress without eccentricity and can safely function.

In addition, the lower body 1101, 1102, 1103 forms a single stage with one or a set of lower body as shown in Fig. 1 and 2, the distance to the upper fixing means along the centerline of the lower body It may consist of a number of stages that differ. Permanent anchor of the present invention, the lower end of the lower body and the lower body of the lower body can be connected using a single pressure port. In this case, even if it has a multistage loading body, the loading body can be firmly and uniformly combined.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention if it is obvious to those skilled in the art.

1 is a cross-sectional view showing a compression type permanent anchor according to an embodiment of the present invention,

2 is a cross-sectional view showing a compression type permanent anchor according to another embodiment of the present invention;

3 is a front view showing an example in which a curved portion is formed in the acupressure hole constituting the compression-type permanent anchor of the present invention;

4 is a plan view of the acupressure tool constituting the compression-type permanent anchor of the present invention,

5 is a plan view showing still another example of the acupressure tool constituting the compression-type permanent anchor of the present invention.

<Description of Symbols for Main Parts of Drawings>

120: pipe (PE pipe) 130: lower fixing means

1101,1102,1103: inner body 1101a, 1102a, 1103a: uneven portion

1101b, 1102b, 1103b: Threaded parts 1201,1202,1203: PC stranded wire (PC stranded wire)

1300: first acupressure port 1301: through hole

1302: grout moving part 1303: curved part

1400: second acupressure hole 1401: through hole

1402: grout moving part 1403: curved part

1500: third acupressure hole 1501: through hole

1502: grout moving part 1503: curved part

1600: fastening means 1700: heat shrink tube

Claims (9)

A tendon composed of a plurality of PI pipes and PC strands, an upper fixing means provided to tension one end of the PC strands to be fixed to the ground surface side, and each of the PC strands as a hollow tube of steel, located at the bottom of the hole diameter. In the compression-type permanent anchor comprising a lower body having a concave-convex portion to accommodate the outer surface, and a lower fixing means which is located on the lower end of the lower body and provided at the other end of the PC strand, A plurality of through-holes are formed to maintain the spacing of the inner body or the PC strand, and a plurality of through-holes are formed to be fixed to the lower end of the inner body in the axial direction, and have a larger outer diameter than the longest distance between the centers of the inner bodies. Chiropractor, A second through hole is formed to maintain the spacing of the lower body or the PC strand, and a plurality of through-holes are formed to be axially fitted to the upper end of the lower body, and having a larger outer diameter than the longest distance between the centers of the lower body. Compression permanent anchor, characterized in that it comprises acupressure ball. The method of claim 1, A lower body having a lower end fitted into the second acupressure hole and fixed thereto; A plurality of through-holes are formed to maintain the spacing of the lower body or the PC strand, and a plurality of through-holes are formed so as to be axially fitted to the upper end of the lower body, and have a larger outer diameter than the longest distance between the centers of the inner body. Compression type permanent anchor, characterized in that it further comprises three acupressure. 3. The method of claim 2, The P-pipe is a compression type permanent anchor, characterized in that installed to accommodate the PC strands from the top of the lower body to the anchor head. 3. The method of claim 2, The P-pipe is a compression type permanent anchor, characterized in that installed to accommodate the PC strands from the inside of the lower body to the anchor head. The method according to claim 3 or 4, Fixing the inner body and the first, second and third acupressure holes is made of a fastening means, The lower fixing means is a compression type permanent anchor, characterized in that coupled to the fastening means installed to be in close contact with the first, second, third pressure sphere installed on the lower body. The method of claim 5, The inner body is supported by one side of the first, second, third pressure port is fixed by one end of the uneven portion formed on the outside, Compression-type permanent anchor, characterized in that the other surface of the first, second, third acupressure sphere is fixed by a fastening means fastened to the screw formed on the end of the lower body. The method of claim 6, Compression-type permanent anchor, characterized in that the meeting portion of the lower surface and the lower side of the first, second, third acupressure sphere has a curved portion. The method of claim 6, The 1,2,3 acupressure sphere is a compression-type permanent anchor, characterized in that the grout moving portion is formed so that the grout injected into the hole diameter can move. The method of claim 6, Compression-type permanent anchor comprising a heat-shrink tube for connecting the pipe pipe for accommodating the upper portion of the inner body and the PC strand inside.

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