KR101410397B1 - Multi extending permanent anchor structure with hitting wedge - Google Patents

Abstract

The present invention relates to a permanent anchor structure and, more specifically, to a multiple extension permanent anchor structure with a striking wedge, having maximized bearing capacity. The multiple extension permanent anchor structure with a striking wedge according to the present invention comprises an anchor body (10) partitioned into multiple units (10a) on the basis of a vertical central axis; a striking wedge (20) having a catching part (22) protruding outward from the lower outer circumference to be caught in a catching protrusion (14a); a blade catching protrusion (30) having a first striking bar through-hole (32) at the center; a first extending wedge (40) having a strand engaging hole (44) connected to the bottom of a strand (1); a second extending wedge (50) of which the top is connected to the first extending wedge (40); an extending blade finishing plate (60) partitioned into multiple members on the basis of the vertical central axis to be engaged with the bottom of each unit (10a) of the anchor body (10); and a striking bar (70) of which the top is connected to the striking wedge (20) and of which the bottom protrudes outward from a third striking bar through-hole (51) of the second extending wedge (50) to be connected to a striking head (71) at the bottom. The present invention maximizes bearing pressure, thereby significantly improving bearing capacity including circumferential frictional resistance caused by grouting.

Description

≪ Desc / Clms Page number 1 > Multi-extending permanent anchor structure with hitting wedge &

The present invention relates to a permanent anchor structure, which is expanded in multiple by a first expansion wedge and a second expansion wedge, wherein the upper and lower portions of the expansion wedge are equally spaced, and the frictional resistance of the anchor body, To a multi-expansion permanent anchor structure with a striking wedge that maximizes bearing capacity.

Ground anchors are classified into permanent anchors applied to permanent structures by duration and purpose, and hypothetical anchors generally used for less than 2 years. They are classified as friction, And are classified into tensile type, compression type dispersion type, compression type concentration type, and the like depending on the supporting method by the grout of the tensile material.

And it can be classified into PC steel wire anchor, steel wire anchor, buried anchor, and removal anchor depending on the type of tension material and usage purpose.

As described above, in order to secure the tensile force, which is the most important reason why the ground anchor method is classified in various ways, the construction method and material selection should be performed according to the ground conditions.

Currently, the usual application procedure is as follows: a perforation hole having a diameter of about 105 mm is formed by a perforating machine, an anchor having a length of about 10 to 30 m is inserted into the perforation hole, then grouting is performed, The construction (wall) and the anchor are fixed, and the construction is carried out in order to stabilize the prestress by about 30 to 80 tons.

Since the tensile force is secured only by the cross-sectional area of the perforation and the grout, it is difficult to secure the tensile force because the frictional force is weak when the stratum is weak. Therefore, the construction period is delayed due to excessive design (increase in quantity) And increase the cost of construction, as well as bring about the risk of overburden displacement and collapse due to unreasonable construction.

In addition, there is a permanent anchor type which is called a compression anchor and is applied to the rock layer. It has the advantage of securing a tensile force even if the length is shorter than other anchors, but it is not applicable to a soft layer, And the additional process is excluded from the additional process due to the principle that the additional process is artificially applied to the additional process.

As a result, there has been a problem in that it is difficult to ensure a satisfactory workability in any stratum due to the lack of technical and economical advantages.

Above all, there is a problem that it is difficult to keep the frictional resistance by abutting against the air wall with only a part of the anchor body which is not extended at regular intervals.

As a technique for solving the above problems, there has been proposed a technique in which a plurality of (for example, two or more) anchors are provided on an outer circumferential surface of a pressurized anchor (a Korean Patent Registration No. 10-1222477, An insertion body inserted into the insertion hole of the cap, a support plate formed at the front end thereof, and an insertion protrusion formed at the rear end of the body, a body having a fastening groove for fastening the anchor body, a piercing body fastened to the front end of the body, The boss body is formed with an inclined surface corresponding to the inner surface of the shoulder portion of the bore hole, and an insertion groove having an inclined surface is formed at the center of the bore. And a plurality of guide grooves having guide shafts inserted therein are formed on the outer surface thereof.

When the anchor is inserted after forming the perforation hole vertically or inclined using the hammer bit, the end of the perforation hole is widened to form the hole having the shoulder portion. When the anchor is inserted, the weight of the anchor and the hole hole angle , The base plate of the impact bar installed at the tip of the body collides with the bottom surface of the hole of the expansion hole, and at this time, the insertion protrusion fastened to the rear of the impact bar vertically moves upward, and at the same time, When the strand is pulled upwards in this state, the frictional grooves formed on the outer surface of the bobbin body come up in a state that the frictional grooves are open, and then they are fixed to the inside of the shoulder portion of the borehole and then grout is performed.

However, the above-mentioned Patent Document 1 has a problem in that the opening body is widened by the wedge-shaped insertion protrusion or the widening of the wedge body is limited, and the adhesion of the friction groove of the wider body to the outer wall of the expansion hole is deteriorated.

In addition, there has been a problem in that it is not possible to adjust the interval of the opening body.

KR 10-1222477 (2013.01.09)

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an anchor body having a structure in which an upper portion and a lower portion of the anchor body are extended at regular intervals, The maximum frictional force is exerted to include the peripheral frictional resistance by the grout so that the supporting force can be greatly improved.

More specifically, a striking wedge, a first expansion wedge, and a second expansion wedge are connected to the upper, middle and lower portions of the striking bar, respectively. In the process of expanding the anchor body, a striking wedge, a first expansion wedge, a second expansion wedge The upper and lower portions of the anchor body are extended to a predetermined width so as to be evenly adhered to the main surface of the hole of the perforated hole by the contact with the upper, middle and lower portions of the anchor body, So that they can be evenly dispersed.

Particularly, when the impact bar impacts on the floor of the perforation hole, the primary inclined portion of the primary expansion wedge is upwardly moved on the inclined guide portion inside the anchor body, and the primary expansion wedge expands first. When the tension is applied to the strand, The anchor body is expanded by applying a tensile force to the strand of the strand, and at the same time, the anchor body is extended so as to be horizontally extended to the third position while leaving the jaw insertion hole So as to increase the supporting force through the multiple expansion, and to form a jaw according to the third horizontal expansion so that the upper end of the anchor body is stuck on the upper part of the expansion hole, so that a stronger supporting force can be exhibited.

In addition, a buffer plate is provided between the extension wing finish plate provided under each anchor body and the lower portion of the first expansion wedge, and impact generated when the impact head hits the hole of the expansion hole is transmitted to the anchor body and the extension wing finish plate So that the desired operation can be achieved.

That is, the present invention maximizes the supporting force by multiplying the anchor body when the striking hole is struck by the anchor body, and when the stern body is drawn out, the upper and lower portions of the anchor body are evenly expanded, By extending horizontally and digging the ground, the upper end of the anchor body is caught on the ground, thereby increasing the frictional resistance of the anchor body, maximizing the ground pressure in the hole and providing the peripheral frictional resistance by grouting. .

In order to solve the above-mentioned problems, a multiple expansion permanent anchor structure having a striking wedge according to the present invention has a plurality of stranded wire insertion holes (11) formed at the upper end thereof in a vertical direction, A plurality of tightening ring insertion grooves 13 are formed on the outer circumferential surface of the lower portion of the inclined portion 12 so as to enclose the tightening ring 13a, The hollow portion is formed with a striking wedge insertion hole 14 in which an engagement protrusion 14a is formed in order from the upper side to the lower side and the striking wedge insertion hole 14 is spaced apart from the striking wedge insertion hole 14 The inclined guide portion 16a has a lower inner circumferential surface formed by an extended wedge guide hole 16 formed vertically. The inclined guide portion 16a is formed with an inclined guide hole 16a Be And, based on the center of the vertical axis and a plurality of units (10a) to the anchor body (10) which divide; A strand guide groove 21 is formed in a vertical direction on the outer circumferential surface so as to be in line with the strand insertion hole 11 and the engagement protrusion 14a is formed on a lower outer circumferential surface, A striking wedge (20) formed with an engaging portion (22) protruding outward so as to be engaged with the striking wedge (20); Hole 31 is formed in a vertical direction so as to be in line with the strand insertion hole 11 and a first impact bar penetration hole 32 is formed at the center of the strut penetration hole 31, A wing-clipping jaw 30 formed with a wing; And an upper inclined portion 41 having an inclination angle equal to that of the inclined guide portion 16a is formed on the upper side of the upper wedge guide hole 16, A second vertical bar penetrating hole 43 is vertically formed at the center of the vertical bar 42 and the vertical bar 42 is vertically formed in the center of the vertical bar 42. The strand insertion hole 11, A primary expansion wedge 40 formed with a strand connecting hole 44 to which a lower portion of the strand 1 installed through the through hole 31 is connected; And a third striking bar through hole 51 is formed at the center of the third striking bar through hole 43 in a straight line with the second striking bar penetrating hole 43. A first inclined surface 52 inclined downward or inclined is formed on the whole or a part of the outer circumferential surface A second expansion wedge (50) having an upper portion connected to the primary wedge (40); And is connected to the lower end of each unit 10a of the anchor body 10 and has an enlarged wedge insertion hole (not shown) formed at the center thereof in a straight line with the third hitting bar through- 61 is formed on the upper wedge insertion hole and the extended wedge insertion hole has an extended wing finishing plate 60 having a lower inclined face 61a formed to have the same inclination angle as the first inclined face 52 of the secondary wedge, and; The upper portion is connected to the striking wedge 20 and the lower portion of the second widening wedge 50 is protruded to the outside of the third striking bar through hole 51 and the striking head 71 is connected to the lower end thereof. And a bar (70).

At this time, between the lower end of the first widening wedge 40 and the enlarged wing finishing plate 60, a fourth striking bar through-hole 81, which is in line with the second striking bar through-hole 43, A buffer plate 80 made of a stretchable material; An enlarged wedge finish plate 90 provided at a lower portion of the buffer plate 80 and having a fifth bar bar through hole 91 formed at the center thereof and aligned with the fourth bar bar through hole 81, Is installed.

The length a of the first inclined face 52 of the second widening wedge 50 protruded below the extended wing finishing plate 60 is longer than the length a of the anchor wing 40 Is formed to be equal to or longer than the distance b to the upper end of the inclined guide portion 16a,

The inclination angle of the first inclined surface 52 has an inclination angle of +/- 1 DEG with respect to the inclination angle of the inclined guide portion 16a.

In addition, the groove 63 and the projection 52a, which are engaged with the extended wedge insertion hole 61 of the extension wing fin 60 and the first inclined face 52 of the secondary wedge 50, As shown in FIG.

In addition, the bottom surface of the engaging jaw insertion hole 15 is formed with a guide protrusion 15a having a sectional shape inclined downward toward the center.

According to the present invention, since the upper and lower portions of the anchor body are extended at equal intervals in the hole, the friction force of the anchor body and the air wall is uniformly dispersed while exhibiting the maximum ground pressure, It is possible to increase the supporting force by including the resistance force.

More specifically, a striking wedge, a first expansion wedge, and a second expansion wedge are connected to the upper, middle, and lower portions of the striking bar. In the process of expanding the anchor body, the striking wedge, the first expansion wedge, and the second expansion wedge The upper and lower portions of the anchor body are extended to a predetermined width so as to be evenly adhered to the main surface of the hole of the perforated hole by the contact with the upper, middle and lower portions of the anchor body, So that it can be uniformly dispersed.

Particularly, when the impact bar impacts on the floor of the perforation hole, the primary inclined portion of the primary expansion wedge is upwardly moved on the inclined guide portion inside the anchor body, and the primary expansion wedge expands first. When the tension is applied to the strand, The anchor body is expanded by applying a tensile force to the strand of the strand, and at the same time, the anchor body is extended so as to be horizontally extended to the third position while leaving the jaw insertion hole Thereby enhancing the supporting force through multiple expansions and forming a jaw along with the third horizontal expansion so that the upper end of the anchor body is stuck on the upper portion of the enlarging hole and can be more firmly supported.

In addition, a buffer plate is provided between the extension wing finish plate provided under each anchor body and the lower portion of the first expansion wedge, and impact generated when the impact head hits the hole of the expansion hole is transmitted to the anchor body and the extension wing finish plate So that a desired operation can be performed.

That is, the present invention maximizes the supporting force by multiplying the anchor body when the striking hole is struck by the anchor body, and when the stern body is drawn out, the upper and lower portions of the anchor body are evenly expanded, By extending horizontally and digging the ground, the upper end of the anchor body is caught on the ground, thereby increasing the frictional resistance of the anchor body, maximizing the ground pressure in the hole and providing the peripheral frictional resistance by grouting. Can be greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a exploded cross-sectional view of a multiple expansion permanent anchor structure with a striking wedge of the present invention.
2 is a cross-sectional view of a multiple expansion permanent anchor structure with a striking wedge of the present invention.
3 is a sectional view showing a state in which a stranded wire is connected to a permanent anchor structure of the present invention.
4 is a cross-sectional view illustrating a state where the permanent anchor structure of the present invention is inserted into the perforation hole.
5 is a cross-sectional view showing a state in which the anchor body is first expanded by striking the striking head at the bottom of the perforation hole in the state of FIG.
Fig. 6 is a cross-sectional view showing a state in which the anchor body is extended in a second order by applying tension to the strand of the strand in Fig. 5;
FIG. 7 is a cross-sectional view showing an anchor body expanded in a third order by applying tension to a stranded line in FIG. 6;
8 is an exploded perspective view showing still another embodiment of the secondary expansion wedge and the expansion blade fin plate in the present invention.
9 is a photograph showing an embodiment in which a striking wedge, a winging jaw, a first expansion wedge, and a second expansion wedge are connected to the impact bar in the present invention.
10 is a photograph showing a state where the components of FIG. 9 are inserted into the anchor body.
FIG. 11 is a photograph showing an installation state of components in a state where stranded wires are connected to a primary expansion wedge in FIG. 9; FIG.
FIGS. 12 and 13 are photographs showing an expanded state of the anchor body according to the movement of the primary expansion wedge and the secondary expansion wedge;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a multi-expansion permanent anchor structure having a striking wedge according to the present invention will be described in detail with reference to the accompanying drawings.

The multiple extension permanent anchor structure with a striking wedge of the present invention includes an anchor body 10, a striking wedge 20, a wing stitch 30, a primary wedge 40, a secondary wedge 50, An enlarged wing finishing plate 60, and a striking bar 70.

As shown in Figs. 1 and 9, the anchor body 10, which is a component of the present invention, has a plurality of stranded wire insertion holes 11 vertically formed at the upper end thereof.

The stranded wire insertion hole 11 is formed while equally dividing the central axis while being spaced apart from the upper portion of the hollow portion to be described later outwardly.

In Fig. 1 and Fig. 11 are shown grooves on both sides of the inner circumferential surface of each unit 10a constituting the anchor body 10, (10a) are combined to form a hole shape.

Such an arrangement can be achieved by merely forming a groove shape in the anchor body 10 without forming a separate hole, thereby facilitating member fabrication and manufacturing.

In addition, an inclined portion 12 is formed on the upper outer circumferential surface so that the outer diameter gradually increases toward the bottom.

A plurality of fastening ring insertion grooves 13 are formed on the outer circumferential surface of the lower portion of the inclined portion 12 and the fastening ring insertion grooves 13 are formed in the lower portion of the inclined portion 12. [ And a tightening ring 13a is wrapped around.

The tightening ring 13a may be composed of various members such as a rubber ring, a spring, and the like, which tightly surrounds the anchor body 10 and tightens toward the center.

In addition, the outer circumferential surface of the anchor body 10 may be formed in various surface shapes such as a pore, a groove, and an embossing in order to increase the grounding force.

11, the anchors 10 are divided into a plurality of units 10a on the basis of the central axis in the vertical direction, and the divided units 10a are integrally formed in a cylindrical shape As shown in Fig.

On the other hand, the anchor body 10 has hollow hollow portions formed therein from the upper portion to the lower portion. The hollow portions are successively inserted from the upper side to the lower side in the order of the striking wedge insertion hole 14, the engagement jaw insertion hole 15, A guide hole 16 is formed.

The striking wedge insertion hole 14 is formed with a locking protrusion 14a at an upper portion thereof as shown in Fig.

In addition, the striking wedge insertion hole 14 may be formed so that the inner diameter gradually increases from the top downward, or the inner diameter gradually increases in the bottom section.

The oblique shape is intended to allow the striking wedge 20 to be slidably upwardly movable within the striking wedge insert hole 14 in accordance with the upward movement of the striking bar 70.

The latching jaw insertion hole 15 is formed spaced apart from the striking wedge insertion hole 14 as shown in the figure.

At this time, between the engaging jaw insertion hole 15 and the striking wedge insertion hole 14 is formed larger than the outer diameter of the striking bar 70 so that the striking bar 70 can be moved sufficiently, And has a diameter smaller than that of the insertion hole (15) while being connected to each other while being communicated with each other.

At this time, it is preferable that the bottom surface of the latching jaw insertion hole 15 is formed with a latching jaw guide portion 15a having a sectional shape inclined downward toward the center as shown in the drawing.

4 to the step of FIG. 5, that is, when the striking head 71 is struck by touching the bottom of the hole, the wing stitching jaw 30 is inclined with respect to the inclined stitching jaw So that each unit 10a of the anchor body 10 can be opened naturally by sliding along the guide portion 15a.

The extended wedge guide hole 16 is formed with an inclined guide portion 16a which is directly connected to the engaging jaw insertion hole 15 and whose inclined inner diameter gradually decreases in the upward direction.

At this time, the lower inner peripheral surface of the inclined guide portion 16a is formed vertically.

The impact wedge insertion hole 14, the engagement jaw insertion hole 15 and the extended wedge guide hole 16 are formed by dividing the anchor body 10 into a plurality of units 10a, So that the inner wall surface of the unit 10a has a groove shape.

The striking wedge 20, which is a component of the present invention, is inserted into the striking wedge insertion hole 14, and on the outer circumferential surface thereof, a stranded guide groove 21 is formed in a straight line with the striking- And is formed in a vertical direction.

In addition, a latching portion 22 is formed on the lower outer circumferential surface so as to protrude outward so as to be caught by the latching protrusion 14a.

The engagement portion 22 is engaged with the engagement protrusion 14a before each unit 10a of the anchor body 10 is extended. When the engagement protrusion 14a has an inner diameter larger than the outer diameter of the engagement portion 22 , The striking wedge 20 protrudes outside the striking wedge insertion hole 14 and becomes movable.

The striking wedge 20 is formed with a striking bar fastening groove 23 at a lower portion thereof so that the upper end of the striking bar 70 can be inserted and connected while being screwed.

As shown in Figs. 1 and 9, the wing-hooking jaw 30, which is a component of the present invention, is inserted into the engaging jaw insertion hole 15 and is inserted through the stranded wire insertion hole 11 Holes 31 are formed in the vertical direction and a first impact bar through hole 32 through which the middle of the impact bar 70 penetrates is formed at the center.

The wing hook 30 is slidably moved up and down by the hitting bar 70 through the first hitting bar penetration hole 32 and the hitting bar 70 through the hitting bar 30.

In addition, the strand 1 passes through the perforated strand through hole 31 so that it can move up and down along the strand 1.

As shown in Fig. 4, the wing catching jaw 30 is inserted into the engaging jaw insertion hole 15 so that it can not move up and down. However, when each unit 10a of the anchor body 10 is expanding or expanding It may be slid along the guiding jaw guide 15a or may be pushed by the primary wedge 40 and moved to the striking wedge insertion hole 14 as shown in Fig.

The primary expansion wedge 40, which is a component of the present invention, is inserted into the extended wedge guide hole 16 in the anchor body 10 as shown in FIGS. 1, 2 and 9.

The first widening wedge 40 has an upper inclined portion 41 having an inclination angle equal to that of the inclined guide portion 16a. The first widening wedge 40 has an upper inclined portion 41, So that it can move along the inclined guide portion 16a.

In addition, a vertical portion 42 formed vertically is formed in the lower portion of the upper inclined portion 41.

In the center of the first widening wedge 40, a second bar 43 is vertically formed so that the bar 70 is connected.

In addition, a stranded wire fastening hole 44 is formed to connect the lower portion of the stranded wire 1 installed through the stranded wire insertion hole 11, the stranded wire guide groove 21, and the stranded wire through hole 31.

At this time, the strand connecting holes 44 are formed in such a manner that the lower portion of the strand connecting hole 44 is formed to be large in diameter and the upper portion thereof is formed in a small size so as to form a step therebetween and the lower portion of the strand 1, The primary expansion wedge 40 is forced to move together with the strand 1 in an upward direction.

The second expansion wedge 50, which is a component of the present invention, has a third impact bar through hole 51 formed at the center thereof and aligned with the second impact bar penetration hole 43, And a first inclined surface 52 inclined downward in the vertical direction is formed on the whole or a part of the outer peripheral surface and an upper portion is connected to the primary wedge 40.

The first expansion wedge 40 is connected to the first expansion wedge 40 by enlarging the inner diameter of the lower portion of the second hitting bar 43 and forming a thread thereon, So that the secondary expansion wedge 50 can be connected to the primary expansion wedge 40 by screwing.

As shown in FIGS. 1, 10 and 11, the extended blade finishing plate 60, which is a constituent element of the present invention, is divided into a plurality of portions with respect to the central axis in the vertical direction, Respectively.

As shown in the figure, the first bolt fastening hole 17 is formed in the lower portion of the anchor body 10, and the extension wing finishing plate 60 And a second bolt fastening hole 62 which is in line with the first bolt fastening hole 17 is formed and the fastening bolt 62a is connected through the two holes.

The plurality of extended wing finishing boards 60 are fixed to the respective anchors 10 and at the center thereof are formed widened wedge insertion holes 61 which are in line with the third striking bar through holes 51.

The extended wedge insertion hole 61 is formed with a second inclined face 61a having a lower inclination angle equal to that of the first inclined face 52 of the secondary wedge 50.

The formation of the second inclined surface 61a in the enlarged wedge insertion hole 61 is advantageous in that when the second wedge 50 is inserted through the enlarged wedge insertion hole 61, So that the second expansion wedge 50 can be smoothly inserted and lifted.

The upper portion of the striking bar 70 is connected to the striking wedge 20 as shown in the figure and the lower portion of the striking bar 70 is connected to the outer side of the third striking bar penetration hole 51 of the secondary wedge 50 And the striking head 71 is connected to the lower end thereof.

The striking head 71 is formed with a striking bar fastening hole 71a into which the lower end of the striking bar 70 is inserted so that the lower end of the striking bar 70 is inserted into the striking bar fastening hole 71a, 70) threadedly formed on the lower outer circumferential surface and the inner circumferential surface of the tightening bar fastening hole 71a so as to be screwed and fixed.

As shown in FIGS. 1 and 2, between the lower end of the primary wedge 40 and the extended blade finishing plate 60, A buffer plate 80 formed of a stretchable material in which a four-bar bar penetration hole 81 is formed; An enlarged wedge finish plate 90 provided at a lower portion of the buffer plate 80 and having a fifth bar bar through hole 91 formed at the center thereof and aligned with the fourth bar bar through hole 81, It is desirable to install.

The buffer plate 80 minimizes the impact generated when the striking head 71 hits the hole of the hole and is transmitted to the anchor body 10 and the extended blade finishing plate 60, .

As shown in the drawing, holes for fastening the bolts are shown on the buffer plate 80 and the enlarged wedge finish plate 90. After a hole, which is in line with the hole, is formed on the bottom surface of the primary wedge 40 And can be fixedly installed through the buffer plate fastening bolt 92 shown in Fig.

The multi-extension permanent anchor structure having the striking wedge of the present invention constructed as described above is characterized in that the upper and lower portions of the anchor body 10 can be extended at the same distance from the center when the anchor body 10 is opened.

This is because the upper striking wedge 20, the intermediate first widening wedge 40 and the lower second widening wedge 50, which are connected to the striking bar 70, , The middle, and the bottom, respectively.

When the anchor body 10 is opened at equal intervals, the outer peripheral surface of the anchor body 10 is uniformly contacted with the inner wall surface of the hole, thereby achieving an equal supporting force and improving the supporting force.

In addition, such an equal force can be exerted even when the anchor body 10 is extended several times.

3, the length (a) of the first inclined surface 52 of the second widening wedge 50 protruded to the lower portion of the wing finishing plate 60 is smaller than the length (a) of the first widening wedge 40, The inclination angle of the first inclined surface 52 is set to be equal to or longer than the distance b from the upper end to the upper end of the inclined guide portion 16a of the anchor body 10, It is preferable to have an inclination angle of +/- 1 DEG of contrast.

This is because when the primary expansion wedge 40 and the secondary expansion wedge 50 connected to each other rise together, the upper inclined portion 41 of the primary expansion wedge 40 at the secondary expansion as shown in FIG. The first inclined surface 52 of the second widening wedge 50 is supported on the second inclined surface 61a of the enlarged finishing vane 60 by contacting the inclined guide portion 16a of the anchor body 10 And expansion is performed in a state of being vertically equalized.

8, the enlarged wedge insertion hole 61 of the wing finishing plate 60 and the first inclined surface 52 of the second widening wedge 50 are engaged with each other, The upper and lower portions of the anchor body 10 can be equally extended by configuring the anchor body 63 and the protrusions 52a along the longitudinal direction.

At this time, the inner wall surface of the anchor body 10 and the outer peripheral surface of the first expansion wedge 40 may also form grooves and projections.

An operation example of the multi-expansion permanent anchor structure having the striking wedge of the present invention constructed as described above will be described below.

First, as shown in FIG. 4, a perforated hole 2 is formed perpendicularly or obliquely to a weathered rock or a crushed rock plate using a hammer bit, and a tip of the perforated hole 2 is widened to have a sloping shoulder portion 3 To form a hole (4).

Then, as shown in FIG. 4, when the permanent anchor structure of the present invention is inserted, the striking head 71 slides down inside the hole and collides with the bottom surface of the hole 4.

5, the first anchoring surface 52 of the second expansion wedge 50 at the lower portion of the anchor body 10 is in the state of continuing the descent of the outer anchor body 10, The first widening wedge 40 connected to the anchor body 10 is also moved upward with respect to the anchor body 10 on the second inclined face 61a of the inner peripheral face of the enlarged wedge insertion hole 61 of the finishing plate 60, The upper inclined portion 41 of the anchor body 10 is raised while being in contact with the inclined guide portion 16a of the anchor body 10.

In this state, the anchor body 10 has a first widening wedge 40 rising on the inclined guide portion 16a and a second widening wedge 40 rising on the second inclined face 61a of the lower extension wing finishing plate 60, The wedge 50 expands horizontally while maintaining a vertical gap.

At this time, the impact wedge 20 connected to the upper portion of the impact bar 70 is moved upward relative to the anchor body 10 to move to the upper portion of the impact wedge insertion hole 14, 22).

The diameter of the hole 4 is larger than the outer diameter of the anchor body 10 which is first expanded. However, the diameter of the hole 4 may be larger than the outer diameter of the anchor body 10 The anchor body 10 may be brought into close contact with the hole 4 only by the primary expansion.

In this primary expansion, the anchor body 10 is opened while the impact wedge 20 is lifted by only a small impact due to its own weight in the permanent anchor structure of the present invention. In this state, the primary expansion wedge 40 and the secondary The enlarged wedge 50 is positioned on the sloped wall surface of the hollow portion of the anchor body 10 and can be expanded more easily than when the stranded wire 1 proceeds.

6, when the strand 1 discharged to the outside of the perforation hole 2 is pulled by using a tensioner, the lower end of the strand 1 is connected to the primary wedge 40 The primary expansion wedge 40, and the secondary expansion wedge 50 upward.

The first widening wedge 40 rides on the inclined guide portion 16a and comes into contact with the bottom surface of the winging jaw 30 provided inside the engaging jaw insertion hole 15. Then, And the wing catching jaw 30 moves the anchor body 10 upward while the upper end of the wing catching jaw 30 is caught by the upper end of the catching jaw insertion hole 15. [

That is, in the second expansion, as in the first expansion, the first expansion wedge 40 and the second expansion wedge 50 come into contact with the anchor body 10 and the extended blade finishing plate 60, respectively, The widening wedge 40 and the winging jaw 30 are pushed up so that the anchor body 10 moves upward and the inclined portion 12 of the anchor body 10 moves upwardly to the hole 4, As shown in Fig.

7, when the strand 1 is further pulled, the upper portion of the primary wedge 40 passes through the insertion hole 15 and reaches the lower portion of the striking wedge insertion hole 14, At this time, the wing catching jaw 30 inserted in the jaw insertion hole 15 is in a state in which the upper end is not caught by the jaw insertion hole 15 by the extension of the anchor body 10, As shown in Fig.

That is, in the third expansion, the upper portion of the first widening wedge 40 is introduced into the insertion jaw insertion hole 15, and the vertical portion 42 of the lower portion of the upper inclined portion 41 is brought into contact with the lower end edge of the jaw insertion hole 15 So that the anchor body 10 extends horizontally.

At this time, the horizontally extending anchor body 10 applies pressure in the horizontal direction to the wall surface and the shoulder portion 3 of the hole 4, and in the case of weathered rock or soft rock fragment, The anchor body 10 is pushed into the inside of the hole 3, so that a firm anchor force can be exerted also on the weak hole 4.

7 shows a first horizontal displacement 5 generated on the inner wall surface of the hole 4 as a result of the anchor body 10 digging in the horizontal direction. The second horizontal displacement 5a generated when the inclined portion 12 of the body 10 digs into the shoulder portion 3 in the horizontal direction is shown by a dotted line.

As the second horizontal displacement 5a is generated as described above, the upper end 18 of the anchor body 10 can exhibit a strong supporting force along the inside of the shoulder portion 3.

At this time, it is preferable that the diameter of the wing catching jaw 30 is formed to be larger than the outer diameter of the first widening wedge 40, so that the wing catching jaw 30 is hooked to the lower end of the extended streak wire insertion hole 11.

When the grouting is performed after the tension is finished, the anchor body 10 evenly contacts the wall surface of the hole 4 vertically and is firmly pressed against the wall surface of the hole 4, The frictional resistance of the hole 4 and the ground pressure of the hole 4 can be greatly exerted, and the peripheral frictional resistance by the grout can be increased to greatly improve the anchor supporting force.

1: Strand 2: Perforated hole
3: Shoulder part 4: Expansion hole
5: first horizontal displacement 5a: second horizontal displacement
10: anchor body 10a: unit
11: Strand insertion hole 12:
13: tightening ring insertion groove 13a: tightening ring
14: striking wedge insertion hole 14a:
15: engaging jaw insertion hole 15a: engaging jaw guide portion
16: extended wedge guide hole 16a: inclined guide portion
17: first bolt fastening hole 18: upper
20: striking wedge 21: strand guide groove
22: fastening part 23: fastening bar fastening groove
30: wing hook jaw 31: stranded wire penetration hole
32: first striking bar penetration hole 40: first expansion wedge
41: upper inclined portion 42: vertical portion
43: second striking bar through hole 44: stranded fastening hole
50: second expansion wedge 51: third hitting bar penetration hole
52: first inclined surface 52a:
60: extension wing finishing plate 61: extended wedge insertion hole
61a: second inclined surface 62: second bolt fastening hole
62a: fastening bolt 63: groove
70: Striking bar 71: Striking head
71a: fastening bar fastening hole 80: buffer plate
81: Fourth impact bar penetration hole 90: Extended wedge finish plate
91: Fifth batting bar through-hole 92: buffer plate fastening bolt

Claims (5)

In the permanent anchor structure,
A plurality of stranded wire insertion holes 11 are vertically formed on the upper end and an inclined portion 12 inclined so that the outer diameter gradually increases is formed on the upper outer circumferential surface. And a tightening ring insertion groove 13 is formed to surround the fastening ring 13a and a hollow portion is formed from the upper portion to the lower portion inside the fastening ring 13a. The hollow portion is provided with a locking jaw 14a A striking jaw insertion hole 15 formed to be spaced apart from the striking wedge insertion hole 14 and an inclined guide portion 16a which is inclined so that the inner diameter gradually decreases in the upward direction, The lower inner peripheral surface of the inclined guide portion 16a is formed of an extended wedge guide hole 16 formed perpendicular to the anchor body 16a. The anchor body 16a is divided into a plurality of units 10a, 10);
A strand guide groove 21 is formed in a vertical direction on the outer circumferential surface so as to be in line with the strand insertion hole 11 and the engagement protrusion 14a is formed on a lower outer circumferential surface, A striking wedge (20) formed with an engaging portion (22) protruding outward so as to be engaged with the striking wedge (20);
Hole 31 is formed in a vertical direction so as to be in line with the strand insertion hole 11 and a first impact bar penetration hole 32 is formed at the center of the strut penetration hole 31, A wing-clipping jaw 30 formed with a wing;
And an upper inclined portion 41 having an inclination angle equal to that of the inclined guide portion 16a is formed on the upper side of the upper wedge guide hole 16, A second vertical bar penetrating hole 43 is vertically formed at the center of the vertical bar 42 and the vertical bar 42 is vertically formed in the center of the vertical bar 42. The strand insertion hole 11, A primary expansion wedge 40 formed with a strand connecting hole 44 to which a lower portion of the strand 1 installed through the through hole 31 is connected;
And a third striking bar through hole 51 is formed at the center of the third striking bar through hole 43 in a straight line with the second striking bar penetrating hole 43. A first inclined surface 52 inclined downward or inclined is formed on the whole or a part of the outer circumferential surface A second expansion wedge (50) having an upper portion connected to the primary wedge (40);
And is connected to the lower end of each unit 10a of the anchor body 10 and has an enlarged wedge insertion hole (not shown) formed at the center thereof in a straight line with the third hitting bar through- 61 is formed on the upper wedge insertion hole and the extended wedge insertion hole has an extended wing finishing plate 60 having a lower inclined face 61a formed to have the same inclination angle as the first inclined face 52 of the secondary wedge, and;
The upper portion is connected to the striking wedge 20 and the lower portion of the second widening wedge 50 is protruded to the outside of the third striking bar through hole 51 and the striking head 71 is connected to the lower end thereof. Bar 70,
Multi - extended permanent anchor structure with striking wedge.
The method according to claim 1,
Between the lower end of the primary wedge 40 and the wing finishing plate 60,
A buffer plate 80 formed of a stretchable material and having a fourth impact bar through hole 81 formed at the center thereof in a straight line with the second impact bar through hole 43;
An enlarged wedge finish plate 90 provided at a lower portion of the buffer plate 80 and having a fifth bar bar through hole 91 formed at the center thereof and aligned with the fourth bar bar through hole 81, Wherein the first, second,
Multi - extended permanent anchor structure with striking wedge.
The method according to claim 1,
The length a of the first inclined face 52 of the second widening wedge 50 protruded to the lower portion of the extended wing finishing plate 60 is smaller than the length a of the first widening wedge 40 from the upper end of the inclined guide of the anchor body 10 Is formed to be equal to or longer than the distance (b) to the upper end of the portion (16a)
Wherein an inclination angle of the first inclined surface (52) is an inclination angle of +/- 1 DEG with respect to an inclination angle of the inclined guide portion (16a)
Multi - extended permanent anchor structure with striking wedge.
The method according to claim 1,
The extended wedge insertion hole 61 of the extended wing finishing plate 60 and the first inclined surface 52 of the secondary wedge 50 have grooves 63 and projections 52a engaging with each other in the longitudinal direction And a second electrode
Multi - extended permanent anchor structure with striking wedge.
The method according to claim 1,
Wherein a bottom surface of the engaging jaw insertion hole (15) is formed with an engaging jaw guide portion (15a) having a sectional shape inclined downward toward the center.
Multi - extended permanent anchor structure with striking wedge.

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