KR101806190B1 - Anchor - Google Patents

Abstract

The present invention relates to an anchor supporting and reinforcing a retaining wall or the like and, more specifically, relates to an anchor enabling a strand to be fixated, separated, and recoupled. The anchor comprises: a strand made of metal; a wedge housing having a through hole into which one side of the strand is inserted, wherein a wedge moving groove is formed at one side of the through hole; and a wedge inserted into the wedge moving groove to move in an axial direction, formed to be the shape of a pipe, and divided into multiple wedges.

Description

Anchor body {Anchor}

The present invention relates to an anchor body supporting and reinforcing earth retaining walls and the like, and more particularly to a strand-relieving anchor body capable of fixing, separating and recombining a strand.

Patent Document 001 relates to a removable ground anchor body using rotation, and includes a hollow waterproof cap, a head coupler coupled to a lower side of the waterproof cap and having a taper hole formed in a longitudinal direction to penetrate a PC stranded wire, A wedge inserted into the taper hole of the coupler to fix the pc stranded wire; a guide hole provided inside the waterproof cap and formed into a tubular shape and having at least one slide groove formed in the longitudinal direction; A body for joining a wedge to a lower portion of the slide protrusion, a key groove for coupling a lower portion of the slide protrusion, and a key groove for coupling the upper end of the strand of the pc, and a pressing spring for elastically pressing the body downward. And it is necessary to make it possible to separate and remove the PC stranded wire or deformed reinforcing bar bonded to the anchor, And that even an impact on maintaining the coupling state for the purpose.

Patent Document 002 relates to a strand holding device of a grounding anchor removing ground. Comprising: a casing opened to one side; An adjustment bolt provided in the casing and detachably connected to a distal end of the strand; A body having a piercing passage coupled to the casing and having a strand passage through which a strand of strand passes to allow the strand to be guided into the casing, the piercing passage having a pressing surface formed on an inner circumferential surface thereof, The control bolt is moved toward the body when the control bolt is pulled out from the female screw so as to be pressed against the pressing surface or is moved away from the pressing surface as the adjusting bolt moves in the opposite direction An open wedge assembly; And a coupling for coupling the wedge assembly and the adjustment bolt to allow the wedge assembly to move in the same direction when the adjustment bolt moves toward the female screw hole.

Patent Document 003 is directed to a strand-removing reinforcing anchor capable of easily removing a strand from a reinforced anchor installed on the ground in order to reinforce a soft ground such as an incision formed in an incision, wherein the anchor is formed into a cup shape, A head cap having a thread formed along the outer circumferential surface of the upper end of the body and having vertical protrusions formed vertically upward on an inner central upper surface of the body; An engaging plate having a predetermined width at an end of the vertical protrusion, the engaging plate having a tapered portion whose outer circumferential surface gradually decreases toward the upper side; A thread is formed along the inner circumferential surface of the lower end of the body so as to be threadably engaged with the thread of the head cap, a tapered portion is formed which becomes larger from the inner circumferential surface to the upper portion of the body, And a fixing body formed with a fixing member.

Patent Document 004 relates to a load-dissipating removable anchor, which is a hybrid single-type inner bottom body in which an inner bottom body, a fore end device for removing stranded wire and a spacer are integrated as one component, and a compressive load is applied to an inner bottom body and a grout The present invention relates to a load-carrying type removing anchor coupling structure capable of uniformly dispersing a load on a sieve, controlling an action direction of a load, and easily removing a strand after an anchor construction and application. Specifically, An upper compression plate formed to have a uniform width along the upper outer circumferential surface of the body portion; Four to six fixing grooves formed inwardly from the outer peripheral surface of the rim of the upper compression plate; A first hole formed in an axial direction from a top surface of the body portion; A second hole communicating axially with the insertion hole, the second hole having a larger diameter than the insertion hole; And a third hole communicating axially with the same diameter as the second hole, the third hole having an inner diameter formed on the inner peripheral surface thereof; And a single-type hybrid inner lower body.

KR 10-1471486 B1 (Registered on December 04, 2014) KR 10-0994237 B1 (Registered on November 8, 2010) KR 10-1047264 B1 (Registration date June 30, 2011) KR 10-1165579 B1 (Registered on July 09, 2012)

The present invention relates to an anchor body supporting and reinforcing earth retaining walls and the like, and more particularly to a strand-relieving anchor body capable of fixing, separating and recombining a strand.

The anchor body of the present invention comprises a stranded wire (100) formed of metal, a through hole (201) into which one side of the stranded wire is inserted, and a wedge flow groove (202 A wedge housing (200) formed thereon; And a wedge (300) inserted into the wedge flow grooves (202) and axially shifted, tubular, and divided into a plurality of wedges (300).

The anchor body of the present invention is a stiffener, a wedge housing and a wedge, which are formed on one side of the outer circumferential surface of the wedge and have a tapered tapered surface 302; And a wedge contact surface 204 formed on one side of the wedge flow groove and contacting the tapered surface.

The anchor body of the present invention includes a ring insertion groove 303 formed at the other side of the wedge outer circumferential surface of the strand, the wedge housing, and the wedge as described above, in which the elastic ring 310 is received.

The anchor body of the present invention is characterized in that, in the stranded wire, the wedge housing and the wedge as described above, the intermediate side is rod-shaped and has a contact surface 401 partially in contact with the through-hole, A male screw (403) formed on the other side of the contact surface, the male screw (403) having a diameter smaller than the diameter of the contact surface and partially screwed with the through hole, a tip formed on one side of the detachable rod, An insertion groove (410); And protrusion receiving grooves 320 formed on the other side of the inner circumferential surface of the wedge, which are wider than the protrusion width.

The anchor body of the present invention includes a detachable rod female thread 440 formed at the other side of the detachable rod and formed in the axial direction in the strand, the wedge housing, the wedge, the ring insertion groove, the detachment rod, A position adjusting screw 500 screwed to the detachable rod female thread and having a bolt head formed on the other side thereof, and an internal stepped portion 210 through which the position adjusting screw body passes and which protrudes into the through hole.

The anchor body of the present invention includes the above-described strand, the wedge housing, and the wedge, wherein the anchor packing is coupled to one side opening of the wedge housing through hole and has a stranded wire inserted at its center, And an end cap (700) which closes the through-hole.

The anchor body of the present invention includes the tension wedge (801) formed on the other side of the strand of the strand, the wedge housing and the wedge as described above; An anchor head 802 which receives the tension wedge, a pressure plate 803 which is assembled to one side of the anchor head and forms a stranded wire penetration hole at the center thereof, a tension plate 803 which compensates the installation angle of the earth anchor, And a pedestal 804 for uniformly dispersing the reinforcing member 804 on the stiffener such as the earth retaining wall.

The anchor body of the present invention includes a function expanding assembly 220 formed on the outer circumferential surface of the wedge housing in the strand, wedge housing and wedge as described above, and forming a stepped surface.

The anchor body of the present invention realizes two separated wedge housings, thereby facilitating assembly of parts for internal wedge detachment. The wedge of the present invention is divided into a plurality of wedges, the teeth are formed on the inner circumferential surface, and the insertion tool is formed at the distal end portion, so that the stranded wire is stably fixed and the insertion can be smoothly implemented. Since the anchor body of the present invention makes complete contact with the tapered surface of the wedge and the wedge contact surface of the wedge flow groove, it is possible to stably fix the stranded wire.

The wedge of the present invention fixes the wedge by the elastic ring, and the wedge expansion is generated by the projection support of the projection receiving groove, so that an effective and stable wedge expansion can be ensured.

According to the present invention, since the end insertion groove is formed, effective rotation can be realized when the strand is rotated, and the detachment rod can be retracted by the rotation of the male screw of the removal rod, thereby ensuring stable opening of the wedge. Since the detachable rod of the present invention includes the wedge spring and the detachable rod spring, the stable operation of the detachable rod is realized, and the position of the wedge can be restored smoothly. According to the present invention, it is possible to repeatedly fix, separate, and fix the stranded wire for each anchor body.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view of an anchor body for fixing a strand of the present invention. Fig.
FIG. 2 is a perspective view showing a connection relationship between a detachable rod and a wedge of the present invention. FIG.
3 is a perspective view of the engagement relationship within the wedge housing of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Example 1-1) The anchor body of the present invention includes a strand 100 formed of a metal, a through hole 201 through which one side of the strand is inserted, and a wedge flow groove 202 formed at one side of the through hole A wedge housing (200); And a wedge (300) inserted into the wedge flow grooves (202) and axially shifted, tubular, and divided into a plurality of wedges (300).

The anchor body of the present invention is a structural member for reinforcing the earth retaining walls and the like and is fixed by grouting by inserting an assembly of a stranded wire and a wedge housing into a hole drilled after drilling the ground. The wedge inside the wedge housing fixes one side of the strand, and the other side of the strand is fixed to the wall, so that it is possible to stably fix the wall or the slope. The wedge is received within the wedge housing, and upon introduction of the tension, the wedge moves axially within the wedge housing. To allow axial movement, the interior of the wedge housing forms a wedge-shaped wedge flow groove, and the wedge is moved within the wedge flow groove. The strand is fixed to the wedge housing by the wedge pressing force. The pressing force is such that a plurality of divided wedges are uniformly disposed on the circumference of the strand of the strand, and a force acts in the circumferential direction of the strand of strand to generate a pressing force. Therefore, the strand and the wedge are fixed.

(Example 1-2) The anchor body of the present invention is the one in Example 1-1, wherein the stranded wire comprises one or more strands.

The stranded wire uses a circular hard wire as a wire, forming a twisted twisted shape. The strand of one strand is preferably composed of seven strands, and the outer side of the strand forms a hexagonal shape by seven wires.

(Embodiment 1-3) In the anchor body of the present invention, in the embodiment 1-1, the wedge housing is divided into two parts separated into a front end portion 200a and a rear end portion 200b, .

Inside the wedge housing, combine the components for wedge and wedge attachment. To ensure smooth assembly, the wedge housing must be removed. It is divided into a front end portion and a rear end portion to separate the wedge housing. The front end portion and the rear end portion are coupled by screw tightening. Or screw joints are the same, and the objects to be replaced with the same purpose and the same effect are within the same scope of right.

(Embodiment 1-4) In the anchor body of the present invention, in Embodiment 1-1, the wedge is formed of any one selected from the two halves, three halves, or quadruples, and each of the split angles is formed to be the same do.

A plurality of wedges attached to the surface of the strand are closely contacted in the circumferential direction of the strand by the action of wedge at the time of tensile force to fix the strand and the wedge. The wedge is moved in the circumferential direction in order to impart the circumferential adhesion force. To allow circumferential movement of the wedge, the wedge is journaled in plurality. The plurality of resigned wedges are squeezed in the circumferential direction of the strands to fix the strands.

(Example 1-5) The anchor body of the present invention, in Example 1-1, includes an inner peripheral surface of the wedge in which a plurality of teeth 301 are formed.

The load in the circumferential direction of the strand of the strand acts as a vertical load on the contact surfaces (outer circumferential surface of the strand and inner circumferential surface of the wedge), and the vertical load generates an axial direction frictional force due to the contact surface friction coefficient. The frictional force prevents axial movement of the strand. However, when the axial load of the strand is higher than the frictional force, slip occurs. In order to prevent the slip, the frictional force must be increased. To increase the frictional force, the inner circumferential surface of the wedge forms a plurality of teeth having minute sizes. The teeth are pressed against the outer circumferential surface of the strand, which can generate a high coefficient of friction and inhibit axial movement of the strand. In addition, a slight deformation is caused on the outer circumferential surface of the strand, and the teeth are engaged with the deformed grooves to prevent the axial slip.

(Example 1-6) In the anchor body of the present invention, in the embodiment 1-1, the tip of the inner circumferential surface of the wedge includes an insert tool 203 having corners formed at a certain angle.

The strand enters the inside of the wedge housing, and the entered strand enters the wedge housing and the wedge in the axial direction. If the strand center axis and the wedge center axis do not coincide, the coupling efficiency decreases. In order to improve the coupling efficiency, the edge portion of the inner circumferential surface of the wedge forms an edge at a constant angle. That is, even if the center axis of the strand does not coincide with the center axis of the wedge, the end of the strand can be brought into contact with the edge of the wedge, and the center axis of the strand can be guided to the center of the wedge by the angle of the edge.

(Examples 1-7) In the anchor body of the present invention, the outside of the strand is covered with a clad in Example 1-2, and the clad is formed of high density polyethylene (HDPE).

The anchor body is inserted into the perforated hole, and the anchor body is fixed by curing the fusing section by grouting. However, if grouting is applied to the strand, the strand can not be removed. To overcome this, the outer surface of the strand is covered with a clad. That is, the strand can be easily removed after grouting. Preferably, the cover body is formed of high-density polyethylene, and exhibits the same purpose and effect, and can be replaced with the same object of the task resolution principle. In order to smoothly separate the strand and the cover body, the interior of the cover body is filled with grease. No covering body is formed at the wedge grip position of the stranded wire, and a covering body is formed from the wedge housing interface.

(Example 2-1) In the anchor body of the present invention, as shown in Example 1-1, a tapered tapered surface 302 formed on one side of the outer circumferential surface of the wedge; And a wedge contact surface 204 formed on one side of the wedge flow groove and contacting the tapered surface.

The inclined load acting on the outer peripheral inclined surface of the wedge is divided into the circumferential load (vertical load) and the axial load (horizontal load) by the inclination angle, and the vertical load acts as a vertical load on the outer circumferential surface of the strand. Therefore, for inclined load application, the wedge circumferential surface forms a tapered surface. The interior of the wedge housing forms a wedge contact surface that is in close contact with the tapered surface. That is, the contact surface contact of the tapered surface with the wedge generates the contact surface load of the stranded wire.

If the diameter of the inner circumference of the wedge is smaller than the diameter of the outer circumference of the strand, it is impossible to join the strand with the wedge. The diameter of the inner circumference of the wedge should be greater than or equal to the diameter of the outer circumference of the strand, and the circumferential movement of the wedge should be possible in order to allow entry into the inner circumference of the wedge of the strand. If the tapered surface and the wedge contact surface are in close contact, the circumferential movement of the wedge is impossible. Therefore, to allow circumferential movement of the wedge, there must be a gap between the tapered surface and the wedge contact surface, which is possible by the axial movement of the wedge. For axial movement of the wedge, the interior of the wedge housing forms a wedge flow groove.

(Example 2-2) In the anchor body of the present invention, in the example 2-1, the tapered surface and the wedge contact surface are formed at the same angle.

In order for a uniform load to be applied from the wedge contacting the surface of the strand, the outer circumferential surface of the wedge should be distributed with a uniform inclined load. For a uniform slope load distribution, the tapered surface and the wedge-contacted surface must achieve full contact, which is possible if the inclined surface is formed at the same angle.

(Embodiment 2-3) In the anchor body of the present invention, in Embodiment 2-1, the separation tape 330 is attached to the wedge contact surface and / or the tapered surface.

The wedge contact surface and the tapered surface should be smoothly separated. Separation may not be easy in the state of being squeezed by the introduction of tension. To solve this problem, a separating tape is inserted between the wedge contact surface and the tapered surface. The separating tape is preferably attached to the tapered surface of the wedge, which facilitates the separation of the wedge contact surface and the tapered surface during wedge movement. The separation tape is preferably made of a resin material having a low coefficient of friction, and a coefficient of friction is preferably 0.1 or less.

(Example 3-1) The anchor body of the present invention, as shown in Example 1-1, includes a ring insertion groove 303 formed at the other side of the wedge outer circumferential surface and accommodating the elastic ring 310 .

In order to smoothly engage and separate the wedge and strand, the wedge must move in the circumferential direction. When the wedge is moved in the circumferential direction, the separated wedges can be separated from the predetermined position. In order to prevent this, it is necessary to maintain the coupling by a single restraint device even if it is extended. The restraint device is embodied as an elastic ring. The elastic ring is coupled to the other side of the outer circumferential surface of the wedge and forms a ring insertion groove for elastic ring engagement to prevent the elastic ring from detaching from the wedge.

(Example 3-2) In the anchor body of the present invention, in Example 3-1, the elastic ring includes a rubber ring without joint.

Since the rubber ring has stool formation and high elastic restoring force, it is utilized as the elastic ring of the present invention. The rubber ring is formed of natural rubber or synthetic rubber. The rubber ring is formed in a uniform thickness to maintain uniform deformability.

(Example 3-3) In the anchor body of the present invention, in Example 3-1, the elastic ring includes a metal ring.

The elastic ring uses a metal ring formed of spring steel. One side is cut for circumferential expansion and contraction of the metal ring. Or in a tightly wound spring shape. The inner circumferential surface of the spring is expanded by inner circumferential expansion, and the elastic restoration should be restored when the load is removed.

(Example 4-1) An anchor body of the present invention, as shown in Example 1-1, comprises a contact surface 401 having a bar shape at its intermediate side and in partial contact with the through-hole, A male screw (403) formed on the other side of the contact surface, the male screw (403) having a diameter smaller than the diameter of the contact surface and partially screwed with the through hole; A tip end insertion groove (410) into which an end is partially inserted; And protrusion receiving grooves 320 formed on the other side of the inner circumferential surface of the wedge, which are wider than the protrusion width.

The detachment rod is screwed into the wedge housing through-hole. That is, by the screw engagement, the rotation of the detachable rod leads to axial movement inside the through-hole. Upon retraction of the withdrawal rod axially, the withdrawal rod projection surface is retracted, leading to wedge axial retraction movement and circumferential expansion. Thus, the axial retraction movement of the wedge leads to strand separation.

A projecting protrusion is formed on one side of the detachable rod. When the detachable rod is retracted, the protrusions are retracted together, and the retracting range of the protrusions is within a range of the wedge-accommodating recesses.

The projection receiving grooves of the wedge, the projections inserted in the projection receiving grooves, and the elastic rings for engaging the wedges are all formed on the other side of the wedge. Thus, the protrusion acts as a hinge point in the condition that the wedge is opened, and the elastic ring serves as a load supporting point. That is, a plurality of wedges are opened on the basis of the projections, which enables a stable separation of the stranded wire. The contact surface of the releasing rod contacts a certain portion of the inside of the through-hole, and a stable moving direction can be maintained when the releasing rod is moved.

For joining the strand and the detachable rod, one end of the detachable rod is formed with a leading end insertion groove for joining the stranded wire. The strand wire is twisted with seven strands of wire, and the overall shape forms a regular hexagon. Therefore, the shape of the leading end insertion groove is polygonal, preferably regular hexagonal. The strand is joined to the leading end insertion groove. This is to rotate the desorption rod by the strand rotation.

(Example 4-2) The anchor body of the present invention is the same as the embodiment 4-1, except that the anchor body of the present invention is disposed on the outer side of the contact surface of the detachable rod, one side of which contacts the end surface of the wedge tooth, And a spring 420.

When the detachment rod is retracted by screw rotation, the plurality of wedges form a widened shape. When the wedge is open, the stranded wire can not be joined again. When joining the strand again, the rod must be reversed. However, even if the removal rod is reversely rotated, the detachment rod projection is moved within the interval of the projection receiving groove, so that the wedge keeps the widened state. In order to prevent this, a wedge spring is mounted. During the reverse rotation of the detachment rod, the wedge spring advances due to the elastic restoration of the wedge spring. This makes it possible to grip the outer circumferential surface of the stranded wire because the inner diameter of the wedge becomes small.

(Embodiment 4-3) In the embodiment 4-2 of the present invention, the anchor body includes a spring support plate 430 inserted between the end surface of the wedge tooth and the wedge spring.

A spring support plate is attached between the wedge end face and the wedge spring so that the elastic force of the wedge spring is uniformly distributed on the end face of the wedge tooth. In other words, the spring elastic restoring force is not limited to the spring contact point, so that the elastic force acts uniformly on the wedge ridge section.

(Example 4-4) In the anchor assembly of the present invention, in the embodiment 4-3, the spring support plate includes a resin plate or a metal plate.

The spring support plate is coupled between the wedge spring and the wedge ridge section and takes the form of a donut. The inner diameter receives the detachment rod contact surface and the outer surface is located within the wedge flow groove to support the spring. The spring support plate is preferably formed of a resin plate or a metal plate.

(Example 5-1) An anchor body of the present invention is the anchor body according to Example 4-1, which comprises: a detachable rod female screw (440) formed on the other side of the detachable rod and formed in the axial direction; And an inner stepped portion 210 through which the position adjusting screw body passes and which protrudes into the through hole. The position adjusting screw 500 has a bolt head formed on the other side thereof.

The reversal of the detachment rod causes advancement of the detachment rod and the wedge in the wedge housing through-hole, and finally the detachment rod is separated from the wedge housing to be able to re-join the strand. At this time, in order for the protrusion of the detachable rod to be positioned at the intermediate position of the gap of the wedge receiving recess, an inner step is formed at a position spaced a certain distance from the other surface of the detachment rod, and one side of the position adjusting screw, And is coupled to the removable rod female thread of the first and second openings at a predetermined depth. The bolt head on the other side of the position adjusting screw forms a dimension condition interfering with the inner step, and the position adjusting screw is rotated simultaneously when the removing rod is rotated. However, when the head of the position adjusting screw is brought into contact with the inner stepped portion, the rotation of the detachable rod is prevented and the protrusion of the detachable rod is positioned at the middle position of the gap of the wedge in the projection receiving groove.

(Example 5-2) The anchor body of the present invention includes the detachable rod spring 450, which is located on the outer periphery of the male screw 403 and imparts elastic force to the side surface of the detachable rod contact portion, in Example 5-1 .

When the detachable rod is rotated, it is moved in the axial direction according to the lead of the detachable rod female screw. Removing rod for separation of stranded wire The sliding rod spring is compressed. However, in order to rejoin the stranded wire, the detachment rod advances during the reverse rotation of the detachment rod, and the detachable rod spring imparts the force in the forward direction.

(Example 5-3) In the anchor body of the present invention, the spring constant of the wedge spring is smaller than or equal to that of the detachable rod spring in Example 5-2.

If the spring constant of the wedge spring is smaller than that of the detachable rod spring, the wedge can be moved with a small force during assembly of the strand, but the detachment rod does not retract. Also, if the spring constant of the wedge spring is the same as that of the detachable rod spring, it is necessary to retract the detachment rod with twice the force at the time of removing the strand, so that the operating state can be clearly detected.

(Example 6-1) An anchor body of the present invention, as shown in Example 1-1, comprises: an insert packing (600) coupled to an opening at one side of the wedge housing through hole and having a stranded wire inserted at its center; And an end cap (700) coupled to the other opening of the housing through-hole and closing the through-hole.

The wedge housing inserted into the grouting can allow water to enter into the interior before curing. In order to prevent the inflow of water, one side of the wedge housing through-hole and the other side opening are fitted with an elastic sealant and an end cap to prevent water inflow. Since the stranded wire penetrates the insert packing, an inner through hole 601 is formed.

(Example 6-2) In the anchor body of Example 6-1, the insert packing includes an outer circumferential surface and an inner circumferential surface at one side of the through-hole, which are coupled by grooves and projections.

The elastomeric insert packing and the end cap are integrally joined to the wedge housing through-opening and are formed with protrusions or grooves to prevent them from escaping. Grooves or protrusions are formed on the opening surface to which the protrusions or grooves are coupled to improve the integrity of the coupling.

(Example 7-1) An anchor body of the present invention, as shown in Example 1-1, includes: a tension wedge 801 formed on the other side of the strand; anchor head 802 accommodating the tension wedge; A pedestal 803 which is assembled to one side of the anchor head and forms a stranded through hole at the center, a pedestal 803 for compensating the installation angle of the ground anchor and distributing the tensional force transmitted by the support plate to the stiffener, 804).

The earth retaining method by the earth anchor which is most applied among the retaining method consists of the thumb pile, the wedge, the earth plate, and the earth anchor. In order to support the earth retaining walls, tension is generated in the strand after the grouting curing of the anchor body. For this purpose, the pedestal, the anchor head, the anchor head, and the tension wedge are sequentially assembled on the other side of the strand exposed from the earth retaining wall and the tension is introduced into the strand using a hydraulic jack.

The anchor head is provided with a wedge hole for accommodating a wedge of tension as many as the number of strands, and tension is applied to each strand to fix the strand by a wedge action between the wedge and the wedge. The pressure plate collects the tension acting on each strand and transfers it to the pedestal. In order to facilitate the protrusion of the strand, a stranded wire penetration hole is formed in the center. The pedestal is formed with planes of constant angles through which the strands pass, and each plane contacts one side of the wrist strap and the platen. The plane tangential to the pavement plate is compensated for the inclination angle of the earth anchor installed on the ground, so that the plane tangent to the wale is inclined so as to vertically push the earth retaining wall, and the tension is uniformly dispersed through the earth retaining wall wale.

(Example 8-1) The anchor body of the present invention includes, in Embodiment 1-1, a function expansion assembly 220 formed on the outer peripheral surface of the wedge housing and forming a stepped surface.

A wedge housing inserted into the perforated hole is used to form a function expanding assembly end for introducing some tension to the strand prior to grouting curing or for mounting a function addition device outside the wedge housing for load distribution after grouting curing . The function expansion assembly end forms a stepped surface, or forms a threaded portion on the stepped surface. The function expanding assembly includes a support plate, an inner bottom body, an extension blade, a packer, and the like.

100: Stranded wire 200: Wedge housing
200a: front end portion 200b: rear end portion
201: through hole 202: wedge flow groove
203: Insertion tool 204: Wedge contact surface
210: inner step 220: function expanding assembly stage
300: Wedge 330: Separation tape
302: tapered surface 303: ring insertion groove
310: elastic ring 320: projection receiving groove
400: detachable rod 401: contact surface
402: projection 403: male screw
410: leading end insertion groove 420: wedge spring
430: Spring support plate 440: Retraction rod female thread
450: Removable rod spring 500: Position adjusting screw
600: Insertion packing 601: Through hole
700: End cap 800: Anchor head
801: tension wedge 802: anchor head
803: a tread plate 804: a base

Claims (8)

In the anchor body,
A strand 100 formed of a metal;
A wedge housing 200 having a through hole 201 through which one side of the strand is inserted and a wedge flow groove 202 formed at one side of the through hole;
A wedge 300 inserted into the wedge flow groove 202 to be axially moved,
A protrusion (402) formed on one side of the contact surface and having a diameter larger than the diameter of the contact surface, a protrusion (402) formed on the other side of the contact surface and having a diameter smaller than the contact surface diameter A detachable rod 400 having a male thread 403 coupled to the through hole and a tip insertion groove 410 formed at one side of the projection 402 and partially inserted into the end of the string, A protrusion accommodating groove 320 formed on the other side of the inner circumferential surface of the wedge,
A detachable rod female screw 440 formed on the other side of the detachable rod and formed in the axial direction;
A position adjusting screw 500 having one side screwed to the detachable rod female screw and a bolt head formed on the other side;
And an inner stepped portion (210) through which the position adjusting screw body passes and which protrudes into the through hole.
The method according to claim 1,
A tapered surface 302 formed on one side of the outer circumferential surface of the wedge; And
And a wedge contact surface (204) formed on one side of the wedge flow groove and contacting the tapered surface.
The method according to claim 1,
And a ring insertion groove (303) formed on the other side of the outer circumferential surface of the wedge and accommodating the elastic ring (310).
delete delete The method according to claim 1,
An insert packing (600) coupled to one side opening of the wedge housing through hole and having a stranded wire inserted at its center;
And an end cap (700) coupled to the other opening of the wedge housing through hole and closing the through hole.
The method according to claim 1,
A tension wedge 801 formed on the other side of the strand,
Anchor head 802 for receiving said tension wedge;
A pressure plate 803 assembled to one side of the anchor head and forming a stranded through hole at the center thereof;
And a pedestal (804) for compensating an installation angle of the earth anchor and uniformly distributing the tension transmitted by the support plate to a stiffener such as an earth retaining wall or the like,
The method according to claim 1,
And a function expanding assembly (220) formed on the outer circumferential surface of the wedge housing and forming a stepped surface.

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