KR102292664B1 - Acupressure type soil nail with selective extension direction of anchoring wing - Google Patents

Abstract

The present invention relates to an acupressure type soil nail capable of selecting the extension direction of an anchoring wing. The soil nail comprises: a nail front-end fixing part (F) inserted and fixed inside an anchor hole (A); a nail (100) having a front end coupled to the nail front-end fixing part (F), and formed as a normal deformed bar having protrusions alternately installed on the outer circumferential surface thereof in a semicircular shape so that the nail is inserted into the anchor hole; an injection hose extending from the inside of the anchor hole to a ground side to grout the anchor hole; and a nail fixing part coupled to a rear end of the nail, and provided to correspond to the ground surface on a ground-side of the anchor hole (A) and maintain a state in which tensile force is applied by a rear end thereof fixed to the ground surface by the applied tensile force. The nail front-end fixing part (F) is formed as an extension unit (200) which is positioned on an inner bottom side of the anchor hole (A), is provided so that one side thereof is fixed and coupled to a front end of the nail (100) and the other side thereof provided to be moved on the axis of the nail on the outer circumferential surface of the nail so as to select the extension direction of the anchoring wiring as a ground side in the inner circumference of the anchor hole facing the bottom or ground side of the anchor hole, and has an elastic member for applying elastic force so that the extension unit is moved to the bottom side of the anchor hole on the axis of the nail to extend the anchoring wing in the selected direction.

Description

Acupressure type soil nail with selective extension direction of anchoring wing

The present invention relates to an acupressure-type soil nail capable of selectively extending the anchoring wing, and more particularly, it is possible to select the extension direction of the anchoring blade according to the characteristics of the ground, so that There is no need to separately manufacture the anchorage considering the extension direction, and immediate construction is possible according to the extension direction of the anchorage blade suitable for the ground characteristics of the site. It relates to an acupressure-type soil nail capable of selectively extending the anchoring wing, which can provide a more effective response to ground reinforcement, as it is possible to secure the support rigidity according to selection and construction.

In general, excavation support system required for excavation, retaining, reinforcement of natural and artificial slopes adjacent to railways and roads, construction of civil engineering-related facilities such as underground structures and tunnels, and soil nail used for repair of existing retaining walls and installation of retaining walls The ring (soil-nailing method) preempts the risk of cracking and collapsing of the excavated surface or the adjacent ground in the vicinity of the excavated surface or the surrounding ground in the case of a soft ground mixed with soil or soil and rock walls, where collapse and cracking of the ground can easily occur. As a safety measure to prevent After constructing the surface and drilling the back of the excavation, insert a nail capable of resisting tensile stress, shear stress and bending moment such as reinforcing bars or wires, and then grouting to form a reinforcing soil to increase the shear resistance of the soft ground. It is to improve the stability of excavation work by solving problems such as cracks or collapse that may occur in the excavated soft ground.

Looking at the conventional construction method of nail nailing as described above, after excavating as much as a designated depth of excavation and checking whether the original ground is self-supporting, shotcrete is poured on the excavation surface to prevent relaxation of the original ground immediately after excavation. Then, the nail is inserted into the anchor hole drilled by the perforator to the required depth. By grouting with reinforced concrete inside the nail-in anchor hole inserted in this way, the attachment surface with the original ground is improved. At this time, reinforced concrete may be formed to form a semi-permanent wall. In addition, it can be used for temporary facilities. In this case, after the wire mesh and transverse reinforcing bars are installed, the shotcrete layer and the nail are fixed as a fixture, and the secondary shotcrete is poured to form a wall. That is, in order to increase the adhesion of the original ground, the secondary grouting is performed to complete the construction. Here, a fixture is fastened to one end of the exposed nail in order to support the nail and the shotcrete layer from the pressure of the soil.

However, in the conventional nail nailing, the nail is inserted into the anchor hole and the grout is injected to harden it. Since this method is simply inserted into the anchor hole, the slope cannot be reliably reinforced. After pouring grouting into the anchor hole on the upper side of the slope, hardening for 5 to 7 days, then inserting nails and grouting into the lower anchor hole. As a result, there was a problem that the construction period took a long time.

In addition, the conventional nail nailing method as described above inserts a nail into an anchor hole formed to be inclined on a slope and then injects a grouting material to harden it. The tip of the nail is not located in the center of the anchor hole axis by the load and gravity of the nail but comes into contact with the lower surface on the axis.

In this way, when the nail tip comes into contact with the lower surface on the anchor hole axis due to load and gravity, when the grouting material is injected into the anchor hole, the nail does not settle in the center of the anchor hole and anchors while the nail and the grouting material are hardened. Since it is in contact with the lower surface on the ball axis, there is a problem in that the anchoring strength with the grouting material injected and hardened into the anchor hole is weakened. In addition, the shear strength of the slope is lowered due to the weakening of the anchorage strength, so that cracks or collapse of the ground occur easily, and the reinforcing bars are corroded, thereby increasing maintenance costs and safety problems.

However, in spite of the problems of the soil nail according to the conventional expansion of the fixing wing, it is already widely used, and an alternative technology has not been disclosed yet, and only the expansion of the fixing wing according to the characteristics of the ground A number of techniques are being developed.

Here, the direction of the expansion of the settling wing is changed according to the characteristics of the ground. In the case of relatively hard ground or general ground such as soft rock, the extension direction of the anchoring wing is extended so that the inner side of the anchor hole is spread to the inner periphery. The contact area is made large to obtain holding force during tension, and in the case of soft ground such as soil and sand, the extension direction of the anchoring wing is extended around the outer periphery of the ground side of the anchor hole so that the anchoring blade continues to penetrate into the ground during tensioning. to gain strength.

However, since the fixing part for expanding the fixing wing of the soil nail constructed according to the characteristics of the ground must be constructed and constructed individually, it cannot be installed immediately in consideration of the ground characteristics of the site, and the characteristics of the ground must be checked before construction. There is a problem in the increase of the total air because a separate process is required before construction as it is necessary to measure in advance and select an appropriate fixing unit for construction.

In addition, in the field construction process, since the entire ground in which the anchor hole is drilled does not have the same ground composition, without the preceding process, it is impossible to construct a nail nail suitable for the characteristics of the ground, and the problem of the nail nail described above will be raised as it is.

Furthermore, there is a problem in that the manufacturing cost is increased in separately manufacturing each fixing unit having the extension direction of the fixing wing suitable for the ground characteristics, thereby causing an increase in the construction cost.

1. Republic of Korea Patent No. 10-0950593, registration date March 24, 2010. 2. Republic of Korea Patent No. 10-1059945, registration date August 22, 2011.

Therefore, the present invention was created to solve the above-described problems, and when the soil nail for ground reinforcement is constructed, the direction of the fixation wing that can secure a large holding force according to the ground characteristics is selected at the site, and the soil The purpose of the present invention is to provide an acupressure-type soil nail capable of selectively extending the fixing wing, which can improve the construction quality of soil nail for ground reinforcement as it can be directly applied to nail construction.

In addition, the present invention enables the selection of the extension direction of the anchoring wing of the nail nail anchoring unit according to the characteristics of the ground. By replacing only one component, the expansion direction of the fixing wing can be changed according to the characteristics of the ground, so manufacturing and construction costs can be reduced. Another object of the present invention is to provide an acupressure-type soil nail capable of shortening the construction time and shortening the overall construction period.

Furthermore, according to the present invention, it is possible to secure the support rigidity according to the construction by selecting the extension direction of the fixation wing according to the ground characteristics, so that it is possible to prevent the detachment of the anchor hole of the nail nail during the tensioning process. The purpose of this is to provide an acupressure-type soil nail with a selective extension direction of the fixing wing that can respond more effectively to ground reinforcement as well as reducing construction cost and construction time.

In order to achieve the above object, the acupressure-type soil nail capable of selectively expanding in the present invention includes a nail tip fixing part (F) that is inserted and fixed inside the anchor hole (A), and the nail tip fixing part (F). The nail 100 is formed of deformed reinforcing bars like normal in which the protrusion protrudes alternately in a semicircle shape is formed on the outer periphery so that the tip is coupled and inserted into the anchor hole, and the nail 100 is formed to extend to the ground side in the anchor hole for grouting injection inside the anchor hole In the nail nail formed with an injection hose and a nail fixing part coupled to the rear end of the nail, the anchor hole (A) corresponding to the ground side of the ground, and the rear end is fixed to the ground by applying a tensile force to maintain the tensile force applied, The nail tip fixing part (F) of the nail nailing is located on the inner bottom side of the anchor hole (A), one side is fixedly coupled to the tip of the nail 100 inserted into the anchor hole, and the other side is on the axial line at the outer periphery of the nail. An elastic member that is provided to move, selects the extension direction of the anchoring wing toward the ground side of the anchor hole inner edge facing the anchor hole floor or the ground side, and applies an elastic force to move to the anchor hole bottom side on the axis of the nail so that the anchoring blade expands in the selected direction is provided with an expansion unit 200; the expansion unit 200 is formed by being divided into four in the axial direction of a cylindrical shape, and is expanded and deployed toward the ground side of the inner periphery of the anchor hole (A) and a plurality of fixing wings that are penetrated and fixed (210) and; A nail fixing hole 222 formed in a cylindrical shape and positioned on the inner bottom side of the anchor hole (A) and having a tab formed so that the tip of the nail inserted into the anchor hole is coupled and fixed is located in the center of one surface facing the ground direction of the anchor hole an expansion head unit 220 formed so that the fixing wing is selectively extended to the bottom or the ground side of the anchor hole; A concave groove 212 corresponding to the protrusion shape protruding from the outer periphery of the nail tip is formed on the inner periphery so that it is divided into halves or three parts in a cylindrical shape so as to be coupled to the nail tip. a grip member 230 having a tab 214 formed thereon; The nail guide hole 242 is formed in a cylindrical shape and coupled to the outer periphery of the nail so as to be movable along the nail axis, and one end of the elastic member is placed on one surface facing the ground side of the anchor hole to apply an elastic force. An expansion moving unit 240 provided with a groove 244 is formed, and the fixing wing 210 works together with the expansion head unit 220 to selectively expand to the bottom or the ground side of the anchor ball; A gap fixing member 250 provided to support and support the nail so that the nail does not come into contact with the inner edge of the anchor hole by being coupled on the same axis to the nail on the outer periphery of the nail on one surface of the expansion moving unit 240 facing the ground side of the anchor hole; Elasticity coupled to the outer periphery of the nail between the rear end of the expansion moving unit 240 and the gap fixing member 250, and applying an elastic force in the direction of the expansion head unit 220 with respect to the gap fixing member 250 a member 260; The expansion head unit 220 of the elastic member 260 by preventing the fixing wing 210 from separating away from the axis of the anchor hole and turning and expanding before fixing, and preventing separation and separation and pivoting expansion of the fixing wing. The expansion prevention means 300 is formed so that the application of elastic force in the direction is limited, and the expansion prevention means 300 is formed of a wire so as to bind the four divided fixing wings into one bundle, so that the ring-shaped rings 312 are formed at both ends. a formed wire band 310; The wire band 310 is formed with an anti-expansion pin 320 that is fitted to the ring-shaped ring 312 so that the bond of the wire band 310 is maintained without breaking, so that the anti-expansion pin is fitted to the ring-shaped ring 312 of the wire band 310. And it is formed to intermittently expand the rotation before the elastic force is applied by the elastic member of the fixing blade according to the release, and the fixing blade 210 is formed to have a cross section in the shape of an arc by dividing a cylindrical shape into four in the same direction as the axial direction. , is formed long in the left and right longitudinal direction in the center of the cross-section of the fixing wing in an arc shape, and the expansion prevention pin 320 of the expansion preventing means 300 provided to prevent separation and separation and turning expansion of the fixing wing is fitted with a pin hole 212 class; A plurality of concave-convex surfaces provided to increase friction when the anchor hole penetrates the surface of the anchor hole on the outer circumferential surface of the arc-shaped fixation wing and to prevent the wire band of the expansion prevention means 300 from being separated down the axis of the fixation wing while being bound to the outer edge of the fixation wing. (214) and; When a force is applied to the expansion moving unit 240 in the axial direction on the side of the expansion head unit 220 by the elastic member 260, the inner edge of the anchor hole on the side of the expansion head unit or the elastic member, which is the outer periphery of the arc-shaped fixation wing. an inclined surface 216 symmetrically formed on the inner periphery of both ends in the longitudinal direction so as to extend toward the outer periphery of the paper; a symmetrically formed engaging step 218 so that the fixing wings are caught in parallel between the extended head unit 220 and the extended moving unit 240 toward the end of the left and right inclined surfaces 216; Any one end of the left and right ends of the fixing wing is formed of a circular arc-shaped rotating curved portion 219 provided to smoothly pivot between the pivoting operations of the fixing wing without pivotal interference; the expansion head unit 220 is formed in a cylindrical shape a nail fixing hole 221 formed so that the nail is fixedly coupled to the center of one surface by the grip member 230; A first wedge surface 223 is formed on the outer edge of the nail fixing hole 221 to correspond to the inclined surface 216 of the fixing wing 210 so that the fixing wing extends toward the inner edge of the anchor hole, and the first wedge surface is one end of the other side. a first engaging extension 222 formed so that a vertical first engaging surface 224 is formed at a point ending from and the engaging step 218 of the fixing wing 210 is engaged; It is formed to be inclined upwardly from the lower end of the first engaging surface 224 of the first engaging extension 222 toward one side of the outer periphery in the opposite direction where the nail fixing hole 221 is formed, and together with the first wedge surface 223, a fixing wing ( 210) is formed of a first guide inclined surface 225 provided to expand and guide the anchor hole to the inner edge of the ground. When the expansion head unit 220 becomes the pivot point of the fixation wing, the pivot point of the fixation wing 210 is It protrudes vertically from one surface of the first guide inclined surface 225 to form one surface of the rotational curved part 219 of the fixing wing 210 and is caught while in linear contact, and the elastic member 260 is in linear contact as the elastic force is applied on the axis. One side is supported in a direction opposite to the elastic force and the fixing wing 210 is rotated along the curved surface of the hooked rotational curved part 219 toward the ground side in the anchor hole, and one end of the other side of the fixing wing 210 is rotated. Wire circuit 228; characterized in that it is formed.

In addition, the expansion moving unit 240 is formed in a cylindrical shape and is recessed so that one end of the elastic member 260 coupled to the nail axis is placed on the rear side opposite to the front side facing the expansion head unit, the seating groove 241 is recessed. )class; A second wedge surface 243 is formed so as to correspond to the inclined surface 216 of the anchoring wing 210 toward the outer edge of the front end facing the expansion head unit, and the anchoring blade is extended toward the inner edge of the anchor hole, and the second wedge surface is a second engaging extension 242 formed so that a vertical second engaging surface 244 is formed at a point ending from the other end so that the engaging step 218 of the fixing wing 210 is engaged; From the lower end of the second engaging surface 234 of the second engaging extension 242, it is formed to be inclined upwardly toward one side of the outer edge in the direction in which the seating groove 241 is formed, and the fixing wing 210 together with the second wedge surface 243. a second guide inclined surface 245 provided to expand and guide the anchor hole to the inner edge of the ground; The nail through-hole 246 is penetrated from the center of the seating groove 241 to the center of the second locking extension 242 to allow the nail to pass therethrough. In this case, the second guide inclined surface 245 protrudes vertically to form a pivot point of the fixing blade 210 so that one surface of the rotational curved part 219 of the fixing blade 210 is caught while in linear contact with the elastic member 260 ) as the elastic force is applied along the axis, the one surface in linear contact is supported in the opposite direction to the elastic force and the fixing wing 210 is rotated along the curved surface of the hooked rotational curved part 219 to the ground side in the anchor hole. A second rotational turning portion 248 provided so that one end of the opposite side of the 210 is pivoted; characterized in that it is formed.

On the other hand, the nail tip is fixedly coupled to the expansion head unit 220 including the first rotational turning part 228 by the grip member 230, and the second rotational turning part 248 is an extended moving unit without a configuration. When 240 is provided to move axially toward the expansion head unit by the elastic member 260 , the fixing wing 210 is an elastic member 260 based on the first rotational part 228 of the expansion head unit 220 . ) side of the fixing wing 210, one end is pivotally expanded and deployed toward the ground side of the anchor hole, and is penetrated and fixed, and the nail tip is a grip member 230 in the extended head unit 220 without the first rotational turning part 228 configuration. When the expansion movement unit 240 including the configuration of the second rotational turning part 248 and fixed by the elastic member 260 is provided to move on the axis toward the expansion head unit by the elastic member 260, the fixing wing 210 expands and moves The other end of the fixing wing 210 on the side of the elastic member 260 on the basis of the second rotational part 248 of the unit 240 is rotated and expanded toward the ground side of the anchor hole and is penetrated and fixed, and the first rotational turning part (228) The tip of the nail is fixedly coupled to the expansion head unit 220 without the configuration by a grip member, and the expansion moving unit 240 without the configuration of the second rotational turning part 248 is expanded by the elastic member 260 When provided to move on the axial line toward the head unit, the fixing wing 210 is characterized in that the concave-convex surface 214 is expanded and deployed correspondingly to the ground side of the anchor hole in the horizontal direction on the axial line.

Here, the expansion moving unit 240 is a second engaging extension part 242 of the expansion moving unit 240 so that the two expansion moving units 240 without a seating groove 241 configuration are symmetrically formed integrally. And the second guide inclined surface 245 is formed symmetrically left and right, and a nail through hole 246 is formed through the center of the second row expansion moving unit 240 ′ is further formed, the second row expansion moving unit 240 ′ is expanded The extension movement unit toward the head unit side and the elastic member side is coupled to the outer periphery of the nail on the same axis between the fastening and seating, and the fixing wing 210 is coupled to the extension head unit and the second-row extension and movement unit 240', the second-row extension It is characterized in that it is provided so that the concavo-convex of the two rows of fixing wings are extended to the ground side of the inner edge of the anchor hole by being coupled to the outer edge side of the nail between the mobile unit and the expansion moving unit, so that the contact area is expanded into two rows.

When constructing a soil nail for soil reinforcement according to the present invention, the direction of the fixing wing that can secure a large holding force according to the ground characteristics can be selected at the site and directly applied to the soil nail construction. Construction quality can be improved and the extension direction of the anchoring wing of the nail nail anchoring unit can be selected, so there is no need to separately manufacture anchorages considering the extension direction of the anchorage according to the ground characteristics of the site where the anchor hole is drilled. By replacing only one component, it is possible to change the extension direction of the fixation wing according to the ground characteristics, thereby reducing manufacturing cost and construction cost. It has the effect of shortening the construction time and shortening the overall construction period.

In addition, the present invention can secure the holding rigidity according to the construction by selecting the extension direction of the fixing wing according to the ground characteristics, thereby preventing the nail nail from leaving the anchor hole during the tensioning process. It has the advantage of being able to respond more effectively to ground reinforcement as well as reducing construction cost and construction time.

1 is a side view of the entire installation state of the acupressure type soil nail capable of selectively extending the fixing wing according to the present invention.
2 is an overall perspective view of the acupressure-type soil nail in which the selective expansion direction of the fixing wing is possible according to the present invention.
3 is an exploded perspective view of an acupressure-type soil nail capable of selectively extending the fixing wing according to the present invention.
4 is a perspective view showing the upper side of the fixing wing extended state of the acupressure-type soil nail in which the optional expansion direction of the fixing wing is possible according to the present invention.
5 is an exploded perspective view of the main part of the fixing wing of the acupressure type soil nail in which the optional expansion direction of the fixing wing is possible according to the present invention.
6 is a cross-sectional view taken along line AA of FIG. 2 of the acupressure type soil nail capable of selectively extending the fixing wing according to the present invention.
7 is an exploded perspective view of the main part of the expansion head unit of the acupressure type soil nail in which the selective expansion direction of the fixing wing is possible according to the present invention.
8 is an exploded perspective view of the main part of the expansion and movement unit of the acupressure type soil nail in which the selective expansion direction of the fixing wings is possible according to the present invention.
9 is a side cross-sectional view of the use state when used on the soft ground of the acupressure type soil nail capable of selectively extending the fixing blade according to the present invention.
10 is a side cross-sectional view of the acupressure type soil nail in which the selective expansion direction of the fixing blade according to the present invention is possible when used on hard and general ground.
11 is a side cross-sectional view showing a state in which the contact area of the acupressure-type soil nail, which is capable of selectively extending the fixing wing according to the present invention, is expanded so that the contact area is expanded.
12 is a main part cut-away perspective view showing another embodiment of the expansion and movement unit of the acupressure type soil nail capable of selectively expanding the fixing wings according to the present invention.
13 is an overall perspective view showing another embodiment of the acupressure-type soil nail expansion and movement unit capable of selectively extending the fixing wings according to the present invention.
14 is a side cross-sectional view showing another embodiment of the acupressure type soil nail capable of selectively extending the fixing wing according to the present invention.
15 is a side cross-sectional view showing another embodiment of the expansion prevention pin coupling of the acupressure-type soil nail capable of selectively extending the fixing wing according to the present invention.

Advantages and features of the present invention, and methods for achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a number of different forms.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention, and to completely inform those of ordinary skill in the art to which the present invention pertains to the scope of the present invention. And the invention is only defined by the scope of the claims. Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been specifically described in order to avoid obscuring the present invention.

Like reference numerals refer to like elements throughout. In addition, the terms used (mentioned) herein are for the purpose of describing the embodiments and are not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. In addition, elements and operations referred to as 'include (or include)' do not exclude the presence or addition of one or more other elements and operations.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. Also, terms defined in commonly used dictionary are not to be interpreted ideally or excessively unless defined.

Hereinafter, with reference to the accompanying drawings, the technical characteristics according to an embodiment of the acupressure type nail nail capable of selectively extending the fixing wing according to the present invention will be described in detail.

1 is a side view of the entire installation state of the acupressure-type soil nail capable of selectively extending the fixation blade according to the present invention, and FIG. 3 is an exploded perspective view of an acupressure type soil nail capable of selectively extending the fixing blade according to the present invention, and FIG. 4 is an extended state of the upper side of the fixing wing of the acupressure type soil nail capable of selectively extending the fixing blade according to the present invention. 5 is an exploded perspective view of the main part of the fixing wing of the acupressure-type soil nail capable of the selective expansion direction of the fixing wing according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. 7, and FIG. 7 is an exploded perspective view of the main part of the expansion head unit of the acupressure type soil nail in which the selective expansion direction of the fixing wing is possible according to the present invention, and FIG. It is an exploded perspective view of the main part of the expansion movement unit of the acupressure type soil nail that can be extended in the direction of expansion, and FIG. 9 is a side cross-sectional view of the use state when used on the soft ground of the acupressure type soil nail in which the selective expansion direction of the fixation blade is possible according to the present invention, FIG. A side cross-sectional view of the acupressure-type soil nail in which the selective extension direction of the fixation blade is possible according to the present invention is used on hard and general ground, and FIG. It is a side cross-sectional view showing the contact area is expanded so that the contact area is enlarged, and FIG. 12 is a main part cut-away perspective view showing another embodiment of the acupressure-type soil nail expansion and movement unit in which the selective expansion direction of the fixation blade is possible according to the present invention. , Fig. 13 is an overall perspective view showing another embodiment of the acupressure-type soil nail expansion and movement unit in which the selective expansion direction of the fixation wings is possible according to the present invention, and Fig. 14 is a selective expansion direction of the fixation wings according to the present invention is possible. It is a side cross-sectional view showing another embodiment of the acupressure-type soil nail, and FIG. 15 is an expansion of the acupressure-type soil nail in which the selective extension direction of the fixing wing is possible according to the present invention. It is a side cross-sectional view showing another embodiment related to the prevention pin coupling.

The acupressure-type soil nail capable of selectively extending the anchoring blade according to the present invention can select the extension direction of the anchoring blade according to the characteristics of the ground in which the anchor hole is perforated. The direction is that the one end of the anchoring wing facing the ground side of the anchor hole is spread out so that it has bearing rigidity with respect to the tensile direction of the nail. It is possible to have the support rigidity against the soft ground more easily, so that the extension direction of the anchoring wing is configured so that the bottom side of the anchor hole is expanded. In addition, when penetration of the anchoring wing is difficult, such as in a bedrock, the anchoring blade is horizontally aligned with the axis of the anchor hole so that it is brought into contact with the ground side of the inner edge of the anchor hole to provide support rigidity.

That is, as described above, the direction of the fixing wing is determined according to each ground characteristic, such as soft ground, hard general ground, and rocky ground, to provide support rigidity, thereby preventing separation or poor construction during nail tensioning. However, since the direction of expansion of the fixing blades is not usually a configuration that can be easily changed, it must be provided separately according to the expansion direction of the fixing blades suitable for each ground characteristic, resulting in economic loss and increase in construction time, Problems such as a decrease in on-site response ability occur.

Therefore, the operator can immediately select the extension direction of the fixing wing suitable for the ground characteristics at the site, and through this, it is possible to construct the site quickly. The present invention has been disclosed as a technology that can bring

As shown in FIG. 1, the acupressure-type soil nail capable of selectively expanding according to the present invention as described above includes a nail tip fixing part (F) inserted and fixed inside the anchor hole (A), and the nail tip fixing part ( F) is coupled to the tip to be inserted into the anchor hole, and the nail 100 is formed of deformed reinforcing bars like normal, in which semicircular alternately protruding protrusions are formed on the outer periphery, and the ground in the anchor hole for grouting injection into the anchor hole. An injection hose extending to the side, coupled to the rear end of the nail, and having the rear end fixed to the ground by applying a tensile force corresponding to the ground on the ground side of the anchor hole (A), is formed with a nail fixing unit provided to maintain a state in which the tensile force is applied. By changing the nail tip fixing part (F) of the soil nail to the configuration of the present invention, the operator can selectively change the extension direction of the fixing wing according to the characteristics of the ground.

Therefore, in the present invention, as shown in FIGS. 2 to 5 and 9, the extension unit 200 coupled to the tip of the nail 100 directly forming the nail tip fixing part and the axis of the nail can be installed on the nail 100 in the field. ) and in the process of assembling, the operator selectively selects the extension direction of the fixing wing to suit the ground and is configured to be immediately applied in the field. The nail tip fixing part (F) of the anchor hole (A) is located on the inner bottom side, one side is fixedly coupled to the tip of the nail 100 inserted into the anchor hole, and the other side is provided so as to move on the axis at the outer periphery of the nail. An elastic member is provided so that the anchoring wing expands in the selected direction by selecting the extension direction of the anchoring wing toward the bottom of the anchor hole or the ground side of the anchor hole facing the ground side, and applying an elastic force to move to the bottom of the anchor hole on the axis of the nail. .

Looking at the configuration of the expansion unit 200 having such an action in more detail, as shown in FIGS. 2 to 5 , the fixing wing 210, the expansion head unit 220, the grip member 230, the expansion moving unit ( 240 ), a gap fixing member 250 , an elastic member 260 , and an expansion preventing means 300 .

One side of the fixing wing 210 is a turning reference point for the expansion of the fixing wing, and the tip of the opposite side, which is the turning reference point, is penetrated and fixed to the inner edge of the anchor hole to have a holding strength against the tensile force of the nail. , as shown in Figure 5, is formed by dividing into four in the axial direction of the cylindrical shape, the inner periphery of the anchor hole (A) is expanded and deployed toward the ground side is penetrated and fixed. As described above, the plurality of fixing blades 210 are formed to have a cross section of a circular arc by dividing a cylindrical shape into four in the same direction as the axial direction, pin holes 212, concave-convex surfaces 214, The inclined surface 216, the engaging step 218, and the rotating curved portion 219 are configured.

Here, the fixing wing 210 is bound by a wire band of an expansion prevention means to be described later in order to maintain a state coupled as a bundle to the outside of the tension member in a four-divided state, as shown in FIG. 6 , the wire band An expansion prevention pin that is fitted into the pin hole of the fixing wing is combined to maintain the binding of the . Hereinafter, the part where the binding is maintained will be described in detail in the description of the expansion prevention means.

The pin hole 212 is provided so that the expansion prevention pin of the expansion prevention means, which will be described later, is pin-coupled to prevent the swing expansion of the fixing wing, and the expansion prevention pin is removed from the pin hole so that the rotation expansion of the fixing blade is achieved. The pin hole 212 is formed long in the left and right longitudinal direction in the center of the cross section of the fixing wing in an arc shape, and one end of the expansion prevention pin 320 to be described later provided to limit the expansion of the fixing wing is fitted into the pin hole 212 . and the other end is in contact with the outer periphery of the expansion moving unit 240 and the outer periphery of the gap fixing member 250 to be described later while preventing orbiting expansion of the fixation wing while maintaining a vertical state through a connecting line connected to the outside They are interconnected or individually connected between each other so that the pivotal expansion of the fixation wing is limited.

Here, the pin hole 212 is formed through a cylindrical shape so as not to be separated from the outside of the anchor hole orthogonal to the vertical and longitudinal direction of the fixing wing in a state in which the expansion preventing pin is fitted, as shown in FIG. In addition to the uneven surface to be described later formed to increase the external frictional force, the pin hole is partially cut and opened to the outside on the axis of the fixing wing to increase the frictional force. The bonded portion is formed to be exposed.

The concave-convex surface 214 is configured to increase the frictional force when the anchoring wing is in contact with the inner edge of the anchor hole to increase the holding rigidity. . That is, the concave-convex surface 214 works more effectively when the fixing wing is expanded so that it is parallel to the nail, and it is intended to increase the holding rigidity by contacting the inner edge of the anchor hole and increasing the frictional force.

Here, the concave-convex surface 214 may be formed in the vertical direction and left and right longitudinal directions on the outer surface of the fixing wing, and in the drawing, a plurality of concave and convex surfaces are formed on the outer surface of the fixing wing in a direction perpendicular to the axial direction, , it is divided in the same direction as the axial direction by the cut and open portion of the pin hole described above, so that frictional force can be increased. The settling wings divided into four wraps play the role of a seat groove that is bound into one bundle.

On the other hand, as shown in Figures 5 and 9, the inclined surface 216 is formed to determine the expansion angle of the fixing wing, any one of the expansion head unit 220 or the expansion moving unit 240 to be described later is elastic When a force is applied in the axial direction by the member 260, the fixing blades are symmetrically formed on the inner periphery of both ends in the longitudinal direction so that the fixing blades expand toward the outer periphery of the arc-shaped fixing blades. In addition, the angle of expansion of the fixing wing varies according to the angle with the first and second wedge surfaces 223 and 243 of the expansion head unit or expansion moving unit to be described later corresponding to the inclined surface 216, and accordingly, when the fixing wing is expanded The penetration angle to the inner edge of the anchor hole changes to the ground side, so the bearing stiffness is changed. Here, the optimal angle of expansion of the fixing wing for increasing the holding rigidity is preferably 20° to 45°. If it is extended at an angle smaller than 20°, the depth of penetration into the ground of the anchor hole is low, so the bearing rigidity cannot be satisfied during tension. As a result, the grouting area is enlarged, resulting in an increase in raw material cost and poor workability.

The locking steps 218 are installed on the left and right sides of the inclined surfaces to minimize unnecessary interference (a problem of being caught or contacted with the ground side of the anchor hole due to the spread of the anchoring wings) when the anchoring wings are placed parallel to the arc on the axis to enter the anchor hole. Formed vertically toward the end of the 216, and formed symmetrically so that the fixing wings are caught in parallel between the expansion head unit 220 and the expansion moving unit 240 It is provided to prevent the inflow of foreign matter through the system, and when the fixing blades are expanded, the elastic force is uniformly applied to the plurality of fixing blades so that the fixing blades are expanded uniformly.

The rotational curved part 219 is formed to be a turning reference point when the fixation wing is expanded, and any one end of the left and right ends of the fixation wing is provided to smoothly pivot without interfering with turning between the pivoting operations of the fixation wing, and has a circular arc shape. is formed with That is, the rotating curved part 219 is the assembly position of the extended head unit 220 or the second rotating rotating unit 248 formed with the first rotating rotating unit 228 in the field or factory. The direction of extension of the fixation wing is selected depending on which one of the elastic member side formed on the tip of the nail or the elastic member formed on the axis of the nail is selected. , is formed in the form of a curved curve so that the turning angle can be more easily changed according to the application of the elastic force from the nail axis to the tip side at the reference position.

Furthermore, as mentioned above, determining the selective expansion direction of the fixing wing is composed of the expansion head unit 220 and the expansion moving unit 240, as shown in FIGS. 7 and 8, the first rotation line The expansion direction of the fixing wing considering the characteristics of the ground by the expansion moving unit 240 that moves by receiving an elastic force applied to the expansion head unit 220 according to the configuration of the rotation part 228 and the second rotation part 248. You can choose. The expansion head unit 220 and the expansion moving unit 240 have a first rotational pivot 228 formed in the expansion head unit 220 so that one end of the fixing wing 210 serves as a turning reference during expansion and deployment. Or, when the second rotational turning part 248 is formed in the expansion moving unit 240, one end (the other end) of the fixing wing becomes the turning reference point of the other end (one end) of the fixing wing 210, and the anchor hole inner edge of the fixing wing toward the ground side. The expansion direction is formed to expand upward or downward. Here, the expansion head unit 220 faces the inner bottom surface of the anchor hole in a state in which the end of the tension member is coupled, and the expansion movement unit 240 is wrapped in a state in which the soil nail is penetrated, and the upper side of the expansion head unit 220 is located, and the fixing wing is coupled between the expansion head unit 220 and the expansion moving unit 240 to surround the perimeter of the tension member axis.

The expansion head unit 220 and the expansion moving unit 240 according to the configuration of the first rotational turning part 228 and the second turning turning part 248 are formed when one end of the fixing wing 210 is expanded and deployed. Expansion head unit 220 having a first rotation turning part 228 formed at the tip of the nail so as to be a turning reference - expansion moving unit 240 on the elastic member side on the nail axis, and extension head unit 220 at the tip of the nail - nail axis line An extension moving unit 240 having a second rotational turning portion 248 formed on the elastic member side of the upper nail, an extension head unit 220 at the tip of the nail - In the form of an extension moving unit 240 on the elastic member side on the nail axis line to the operator By selecting the extension direction of the fixing wing can be combined.

As shown in FIGS. 7 and 9, the configuration of the expansion head unit 220 as described above is composed of a nail fixing hole 221, a first engaging extension 222, and a first guide inclined surface 225. A one-turn turning part 228 is additionally formed on the first guide inclined surface 225 and is configured. Here, the expansion head unit 220 without the first guide inclined surface 225 is provided so that the fixing wing is deviated by the first locking extension part 222 toward the outer periphery of the nail, and the first rotational turning part 228 The extended head unit 220 in which is formed serves as a reference for turning one end of the fixing wing by the curve of the rotating curved part while making linear contact with the first rotating turning part.

Here, the nail fixing hole 221 of the expansion head unit 220 is formed in a cylindrical shape so that the tip of the nail is coupled and fixed, and the nail is fixedly coupled to the center of one surface by the grip member 230 . The nail fixing hole 221 can be formed differently depending on the shape of the grip member, and it is preferable to form a wedge shape or a spiral tab as shown in the drawing so that the spiral tab is coupled and fixed.

The first engaging extension portion 222 has a first wedge surface 223 provided at one end of the other side so that the outer periphery corresponds to the inclined surface 216 of the fixing wing 210 so that the fixing wing is extended to the outside of the outer periphery is formed; A first vertical engaging surface 224 is formed at a point where one wedge surface ends from the other end, so that the engaging step 218 of the fixing wing 210 is engaged. That is, the first engaging extension part 222 is engaged so that the fixing wings are parallel to each other on the central axis of the nail before the expansion of the fixing wings, and according to the application of elastic force, the first corresponding to the inclined surface 216 of the fixing blades. As the wedge surface 223 moves along the inclined surface, the fixing wing is expanded and deployed toward the ground side of the inner edge of the anchor hole at an angle corresponding to the angle of the inclined surface.

The first guide inclined surface 225 is the first wedge surface 223 moving along the inclined surface of the fixation wing is expanded and deployed at an extended angle of the fixation wing. First, thereafter, when the first wedge surface is provided so that the fixing wings are expanded and deployed according to the angle of the inclined surface, and the expansion head unit 220 further configured with the first rotational turning part 228 is coupled, the direction in which the elastic force is applied and The force is applied in the opposite direction and is configured to pivot along the arc-shaped curve of the rotating curved part, and the inner edge of the anchor hole bottom side from the lower end of the first locking surface 224 of the first locking extension 222 is the ground direction. The outer edge is formed to be inclined upwardly on one surface, and the fixing wing 210 together with the first wedge surface 223 is provided to extend and guide the anchor hole to one side of the inner edge.

On the other hand, the expansion head unit 220 in which the above-described first rotational turning part 228 configuration is formed is a case in which the expansion head unit 220 becomes a turning reference point of the fixing wing, and forms a turning reference point of the fixing wing 210 . The first guide inclined surface 225 vertically protrudes from one surface so that one surface of the rotational curved part 219 of the fixing wing 210 is caught while in linear contact, and as the elastic member 260 to be described later applies an elastic force on the axis, linear contact As the fixing wing 210 turns toward the ground side in the anchor hole along the curved surface of the rotating curved part 219, which is supported by one side facing the elastic force, one end of the other side of the fixing wing 210 is rotated and opened. prepared to be assured.

On the other hand, the grip member 230 is provided so that the tip of the nail is fixed to the nail fixing hole 222 of the above-described expansion head unit 220, and as shown in FIG. A recess 212 corresponding to the protrusion shape protruding from the outer periphery of the nail tip is formed on the inner periphery so as to be divided into three and coupled to the nail tip. Then, a spiral tab 214 is formed on the outer periphery to be fixedly coupled to the nail fixing hole 222 .

That is, the grip member 230 is provided such that the tip of the nail is stably fixedly coupled to the extension head unit 220 to perform the role of a head positioned on the bottom side of the anchor hole of the nail tip fixing part, and the outer periphery of the nail The grip member 230 is coupled to the tip of the nail by fitting the groove 212 corresponding to the shape of the protrusion formed in the nail to the protrusion formed at the tip of the nail. Here, since the groove 212 corresponds to the shape of the protrusion at the tip of the nail, the grip member is not removed from the tip of the nail unless the grip member 230 is artificially disassembled. Thereafter, the nail tip can be completely fixedly coupled to the extension head unit 220 by tab coupling to the spiral tab of the inner periphery of the nail fixing hole 222 corresponding to the spiral tab 214 of the grip member. Here, although it is shown that the extension head unit and the tip of the nail are coupled by the spiral tab, the outer periphery of the grip member 230 is configured in a wedge shape to be inclined so that the nail fixing hole 222 corresponds to the wedge shape to form a penetration. It is preferable though.

On the other hand, as shown in FIGS. 8 and 9 , the configuration of the expansion and movement unit 240 includes a seating groove 241 , a second locking extension 242 , a second guide inclined surface 245 , and a nail through hole 246 . ) and a second rotational pivot 248 is further formed on the second guide inclined surface 245 . Here, in the case of the expansion moving unit 240 without the second guide inclined surface 245, like the expansion head unit 240 described above, one end of the rotational curved part side of the fixing wing is a second engaging extension part ( 242), and the expansion moving unit 240 with the second rotational turning portion 248 is formed with one end of the fixing wing in line contact with the second turning portion while turning by the curve of the rotational curve. becomes this

Here, the seating groove 241 of the expansion moving unit 240 is formed in a cylindrical shape so that one end of the elastic member 260 coupled to the nail axis is placed on the rear side opposite to the front side facing the expansion head unit. is formed

Meanwhile, the second engaging extension 242 and the second guide inclined surface 245 have the same operational relationship as the first engaging extension 222 and the first guide inclined surface 225 of the aforementioned expansion head unit. As a result, the second engaging extension part 242 has a second wedge surface 243 provided at one end of the other side so that the outer periphery corresponds to the inclined surface 216 of the fixing wing 210 so that the fixing wing is extended to the outside of the outer periphery. , a second vertical engaging surface 244 is formed at a point where the second wedge surface ends from one end of the other side, so that the engaging step 218 of the fixing wing 210 is engaged. That is, the second engaging extension part 242 engages and engages the fixing wings so that they are parallel to each other on the central axis of the nail before the expansion of the fixing wing, and according to the application of elastic force, a second corresponding to the inclined surface 216 of the fixing wing. As the wedge surface 243 moves along the inclined surface, the fixing wing is expanded and deployed toward the ground side of the anchor hole at an angle corresponding to the angle of the inclined surface.

The second guide inclined surface 245 is a first progress so that the fixing wing is spread outward according to the application of elastic force before the second wedge surface 243 moving along the inclined surface of the fixing wing is expanded and deployed at the extended angle of the fixing wing. First, then, when the second wedge surface is provided so that the fixing wings are expanded and deployed according to the angle of the inclined surface, and the expansion moving unit 240 further configured with the second rotational turning part 248 is coupled, the direction in which the elastic force is applied and The force is applied in the opposite direction and is configured to pivot along the arc-shaped curve of the rotational curved part, and from the lower end of the second locking surface 244 of the second locking extension 242, the inner edge of the bottom side of the anchor hole. The outer edge is formed to be inclined upwardly on one surface, and the fixing wing 210 together with the second wedge surface 243 is provided to extend and guide the anchor hole to one side of the inner edge.

The nail through hole 246 is penetrated from the center of the seating groove 241 to the front center of the second locking extension 242 to allow the nail to pass through. , an elastic force is applied to the expansion moving unit 240 by the elastic member so that the expansion moving unit moves toward the expansion head unit 220 without interference between movements along the axis of the nail.

On the other hand, as shown in FIG. 10 , the expansion moving unit 240 having the above-described second rotational turning unit 248 configuration is a case in which the expansion moving unit 220 serves as a turning reference point of the fixing blades. The second guide inclined surface 245 vertically protrudes on one surface to form the pivot point of the 210, and the one surface of the rotational curved part 219 of the fixing wing 210 is caught while in linear contact, and the elastic member 260, which will be described later, is an expansion head. As an elastic force is applied on the axis of the unit 220, one surface in linear contact is supported in a direction opposite to the elastic force and the fixing wing 210 is rotated along the curved surface of the hooked rotational curved part 219 to the ground side in the anchor hole. When one end of the opposite side of the fixing wing 210 pushed toward the expansion head unit 220 by the elastic force is rotated along the first wedge surface of the first engaging extension, it is provided to expand openly.

That is, when an elastic force is commonly applied to the expansion head unit 220 including the first rotational turning part 228 or the extended moving unit 240 including the second turning turning part 248, the curve of the rotational curved part of the fixation wing is curved. As an elastic force is continuously applied while in linear contact with the vertical surfaces of the first and second rotational turning parts 228 and 248, the other ends of the fixing wing are outward along the first and second guide inclined surfaces and the first and second wedge surfaces, respectively. The angle of the fixing wing is changed by expanding as it spreads. At this time, the rotating curved part is continuously rotated according to the application of elastic force while in linear contact with the first and second guide inclined surfaces and the first and second rotating turning parts, respectively, and the expansion head unit constitutes the first and second rotating turning parts of the fixing wing, respectively. Alternatively, one end of the expansion moving unit becomes the pivot point of the fixing wing, and the opposite side is expanded and deployed to penetrate the ground side of the inner edge of the anchor hole.

Accordingly, the direction in which the fixing wing is expanded and deployed is changed according to the application position of the expansion head unit and the expansion moving unit having the configuration of the first and second rotary turning parts, as shown in FIG. 9 , When the expansion head unit constituting the first rotational part is coupled to the tip of the nail, and the expansion moving unit without the configuration of the second rotational part is coupled to the elastic member side on the nail axis, the fixing wing moves toward the ground side where the acupressure plate of the anchor hole is formed. One end of the facing fixing wing is expanded to penetrate into the ground of the anchor hole, and as shown in FIG. 10, an expansion head unit without a first rotational turning part configuration is coupled to the nail tip, and a second rotational turning part is formed. When the expansion moving unit is coupled to the elastic member on the nail axis, one end of the expansion head unit side of the fixing wing moves toward the bottom of the anchor hole by the expansion moving unit moving forward and opens while looking at the bottom side of the anchor hole. As it is selected to penetrate the ground side, depending on the condition of the ground, the expansion direction of the fixing wing can be selected according to the application position by selecting the expansion head unit and the expansion moving unit comprising the first and second rotary turning parts. .

In more detail, the expansion head unit 220 is coupled to the tip of the nail at the bottom of the anchor hole, and the expansion moving unit 240 is coupled to the elastic member 260 on the nail axis to apply the elastic force of the elastic member. When provided to move to the expansion head unit 220 on the nail axis, the fixing wing 210 is coupled to the nail tip by the expansion head unit 220 having the first rotational turning part 228 formed thereon, or the second rotational turning part ( Depending on whether the expansion moving unit 240 formed with 248) is coupled to the elastic member side on the nail axis, one end of the fixing wing 210 is expanded and deployed toward the ground side of the inner edge of the anchor hole, and the position at which the penetration is fixed is on the bottom side of the anchor hole or on the ground side In the case of combining the expansion head unit and the expansion moving unit in a state in which the first and second rotational turning parts are not applied on the nail tip and the nail axis, the fixing wing 210 is the anchor hole in the horizontal direction on the axis. The uneven surface 214 is expanded and deployed to correspond to the ground side.

An operation relationship for this will be described in more detail by way of example.

<Example 1>

As shown in FIG. 9 , the expansion head unit 220 including the first rotational turning part 228 is coupled and fixed to the nail tip by a grip member, and in the seating groove 241 of the expansion moving unit 240 . When the front end of the elastic member, which will be described later, is coupled to the expansion moving unit 240 by the elastic force of the elastic member, it is configured to move toward the expansion head unit 220 along the nail axis.

Before the compressed elastic member returns the elastic force to the expansion moving unit, the extension prevention pin pin-coupled to the pinhole of the fixing wing is removed by pulling the externally connected string. At this time, as shown in FIG. 6 , the rotational expansion restriction of the fixation wing bound by the wire band 310 bound to the periphery of the concave-convex surface of the fixation wing is released. Then, while the elastic force of the elastic member is applied to the extension movement unit, the extension movement unit moves on the nail axis toward the extension head unit.

At this time, according to the application of the elastic force, the portion of the rotational curved portion in contact with the second guide inclined surface of the expansion moving unit coupled to the elastic member side is first angularly deformed to the outside of the outer periphery of the expansion moving unit, and then spreads out, and then, the expansion moving unit 240 While continuing to move along the nail axis toward the extension head unit, the second wedge surface 243 moves toward the extension head unit along the inclined surface 216 of the fixing blade. In this process, due to the inclination angle of the inclined surface 216, the fixation wing is expanded and deployed while being deformed to an angle corresponding to the inclination angle again at the time when the fixing wing is first angularly deformed outward by the second guide inclined surface.

At this time, it is caught on the engaging step 218 of the fixing wing coupled to the first engaging surface 224 of the opposite side expansion head unit 220, and is rotated in a state of being supported in contact with the vertical surface of the first rotating revolving unit 228. The curved part 219 has an elastic force acting in the opposite direction of the force transmitted to the fixing wing according to the axial movement of the expansion moving unit 240, and the fixing changed by the second guide slope first along the curve of the rotating curved part 219 It turns according to the angle of the wing and the angle changed by the second wedge surface and the slope, so that the extension direction of the anchoring wing is extended in the above-ground direction of the anchor hole, so it is usually applied to the ground with the characteristics of soil or soft ground.

<Example 2>

As shown in FIG. 10, the expansion head unit 220, in which the first rotational turning part 228 is not configured, is coupled and fixed to the nail tip by a grip member, and the second rotational turning part 248 is configured. When the front end of the elastic member to be described later is coupled to the seating groove 241 of the moving unit 240, the expansion moving unit 240 is moved along the nail axis toward the expansion head unit 220 by the elastic force of the elastic member.

Before the compressed elastic member returns the elastic force to the expansion moving unit, the extension preventing pin pin-coupled to the pinhole of the fixing wing is removed by pulling the externally connected string. Here, in the pin removal, as in the above-described embodiment 1, the expansion prevention pin coupling is released from the ring-shaped ring 312 of the wire band 310 bound to the periphery of the concave-convex surface, and to the wire band 310. As shown in FIG. 6, the restriction on the turning expansion of the fixing wing bound by the is released. Then, as the elastic force of the elastic member is applied to the expansion movement unit, the expansion movement unit moves on the nail axis toward the expansion head unit.

At this time, according to the application of the elastic force, the portion of the rotational curved portion in contact with the first guide inclined surface of the extension head unit coupled to the tip of the nail is angularly deformed to the outside of the outer periphery of the extension head unit, and then the extension movement unit 240 is Continuing to move along the nail axis toward the extension head unit, the first wedge surface 243 moves toward the extension head unit along the inclined surface 216 of the fixing wing. In this process, due to the inclination angle of the inclined surface 216, the fixing wing is expanded and deployed while being deformed to an angle corresponding to the inclination angle again at the time when the first guide inclined surface is angularly deformed to the outside.

At this time, it is caught by the locking step 218 of the fixing wing coupled to the second locking surface 244 of the extension moving unit 240 on the opposite side that moves toward the extension head unit by the elastic force of the elastic member along the nail axis. The rotating curved part 219 in a state of being supported in contact with the vertical surface of the second rotating rotating part 248 has an elastic force acting in the opposite direction to the force transmitted to the fixing wing according to the axial movement of the expansion moving unit 240, so that the rotating curved part ( 219), the angle of the fixation wing changed by the first guide inclined surface and secondarily the angle changed by the first wedge surface and the inclined surface are pivoted along the curve of Fig. It is applied to parts with general ground characteristics.

<Example 3>

11, the basic type expansion head unit 220 without the configuration of the first rotational pivot 228 is coupled and fixed to the nail tip through a grip member, and elastic force is applied to the elastic member side on the nail axis. If it is composed of a basic type expansion moving unit 240 without the configuration of the second rotational turning part 248 moving toward the expansion head unit 220 along the nail axis.

Before the compressed elastic member applies the elastic force to be returned to the expansion head unit side, the expansion prevention pin pin-coupled to the pinhole of the fixing wing is removed. Here too, the expansion prevention pin coupling is released from the ring-shaped ring 312 of the wire band 310 bound to the periphery of the concave-convex surface as in the first and second embodiments, and the turning of the fixing wing bound by the wire band 310 The extension limit will be lifted. Thereafter, when the elastic force of the elastic member is applied to the expansion head unit, the expansion moving unit 240 axially moves toward the expansion head unit along the nail axis.

At this time, according to the application of the elastic force, both sides of the fixing wing, that is, the portion of the rotational curved portion in contact with each guide inclined surface on the side of the extension head unit and the extension movement unit is horizontally without angular deformation to the outside of the outer periphery of the extension head unit and the extension movement unit first. After being expanded, the first and second wedge surfaces 223 and 243 respectively formed on the extension head unit side and the extension movement unit are fixed while the extension moving unit 240 on the elastic member side continues to move along the nail axis to the extension head unit. It moves toward the expansion head unit along each inclined surface 216 formed at both ends of the wing. In this process, by the inclination angle of the inclined surface 216, the fixing wing is initially horizontally expanded without angular deformation by the first and second guide inclined surfaces formed in the expansion head unit and the expansion moving unit on both sides of the first, and again the angle of the inclined surface is deformed. At the starting point, it expands and expands horizontally again without deformation at an angle corresponding to the angle of inclination.

In other words, when only the expansion head unit and the expansion moving unit having the first and second rotational turning parts are configured, there is a reaction against the elastic action by the first and second rotational turning parts 228 and 248, so that the fixing wing is not installed. The anchor hole is expanded and deployed toward the ground side, but when the operator combines the expansion head unit and the expansion moving unit without the first and second rotational turning parts (228,248), the fixing wing is expanded in parallel with the axis of the expansion head unit, and the anchor By maximizing the contact area on the ground inside the ball, the holding strength is secured. This is usually applied to the solid ground where the penetration of the settling wings is not easy, such as bedrock.

The gap fixing member 250 basically prevents the nail from sagging or coming into contact with the inner edge of the anchor hole, and the nail is placed on the same axis as the center axis of the anchor hole so that the tensile force is properly applied during tension. , is installed at a position facing the ground side of the anchor hole on the same axis of the position where the nail is penetrated and coupled to the nail through hole of the expansion moving unit 240, as shown in FIGS. 2 to 4 . As such, the gap fixing member 250 serves as a support so that the elastic force application direction of the elastic member, which will be described later, is applied to the expansion head unit, and prevents the anchor ball from interfering with the ground when the expansion moving unit moves along the nail axis. make space for

The elastic member 260 is to generate an elastic force for the expansion and deployment of the fixing wing, is coupled between the seating groove of the expansion moving unit 240 and the gap fixing member 250, the gap fixing member (250) The expansion moving unit 240 is provided to move toward the expansion head unit 220 by applying an elastic force in the direction of the expansion head unit 220 based on . Although the elastic member 260 is shown as an elastic spring, it has the same effect even if it replaces the elastic force of the elastic member in the form of a hydraulic or pneumatic cylinder.

As shown in FIGS. 2 and 3, the expansion preventing means 300 prevents the pivoting expansion of the fixing wing 210 before the operation of the elastic member 260, and the fixing wing is not inserted during the insertion process or movement of the anchor hole. The application of the elastic force in the direction of the expansion head unit 220 of the elastic member 260 is limited by preventing separation and departure to the outside of the axis. That is, the aforementioned elastic member 260 is operated only when the binding force of one bundle of the fixing blades divided into four by the expansion preventing means is released, so that the fixing blades can swing and expand.

Therefore, the expansion prevention means 300 for determining the binding and release of the fixing wings composed of 4 divisions is formed of a wire so as to bind the 4 divided fixing wings into one bundle, and a ring-shaped ring 312 is formed at both ends of the wire band. As shown in FIG. 6 , the expansion prevention pin 310 is provided and is formed with an expansion prevention pin 320 fitted to the ring-shaped ring 312 so that the bond of the wire band 310 is maintained without breaking. As shown in Figs. 9 to 11, as shown in Figs. 9 to 11, as the binding and release of the fixing wing of the wire band is determined according to the fitting and releasing of the ring-shaped ring 312 of the wire band 310, it is possible determines the status.

That is, the fixing wings formed in 4 divisions are bound along the periphery of the concave-convex surface of the wire band 310 of the expansion prevention means 300 in the form of one bundle so that the fixing wings are configured in a bundle form, In a state in which the ring-shaped rings 312 formed at both ends of the wire band 310 are overlapped, the expansion-preventing pins 320 are fitted through the pin holes of the fixing wings while being coupled through the overlapping ring-shaped rings 312. The fixing wing is fixed and fixed by a wire band and an expansion prevention pin in a cylindrical shape along the outer periphery of the soil nail, and the upper and lower ends of the fixing wing are intermittent in turning and expanding between the expansion head unit 220 and the expansion moving unit 240 . remain in the state of being In addition, the elastic force of the elastic member acts on the expansion moving unit 240 as the fixing wing is fixed so that the turning expansion is interrupted by the expansion prevention means 300, and the movement toward the expansion head unit 220 is interrupted. will keep

Accordingly, when the anchor hole is inserted into the anchor hole and the fixing position is reached, as shown in FIG. 9 , when the fitting connection is released from the pin hole by pulling the string connected to the upper end of the expansion prevention pin of the expansion prevention means 300, it is shown in FIG. As shown, since the anti-expansion pin 320 is removed from the ring-shaped ring 312 of the wire band, the binding force is also released from the wire band 310 that binds the fixing wing fixed in one bundle. Thereafter, while applying the elastic force so that the elastic force of the elastic member moves the expansion moving unit 240 toward the expansion head unit 220 side, the fixing wing moves the expansion head unit formed with the first rotational part or the second rotational turning part. It is operated by turning in the direction selected by the unit and is fixed to the anchoring position of the ground inside the anchor hole by upward or downward extension of the fixing wing.

Here, the expansion prevention pin 320 is pin-coupled to the pin hole formed on the outer periphery of each fixing wing, and the other end is in contact with the outer periphery of the expansion moving unit 240 and the gap fixing member 250 until completely removed from the pin hole. Even if the binding of the wire band is released, it is formed long in the longitudinal direction so that the turning according to the turning expansion of the fixing wing is partially limited. Here, as described above, the expansion prevention pin 320 is bent in an annular shape at the top to be removed by pulling a string from the outside when removed.

The expansion prevention pin 320 is long formed in a direction perpendicular to the expansion direction of the fixing wing in a state coupled to the pin hole of the fixing wing. (240) and the part in contact with the outer periphery of the gap fixing member 250, the other end acts in the opposite direction to the rotational expansion direction of the fixing wing. That is, as shown in FIG. 9, before the fixing wing is pivotally expanded, in order to limit the expansion, the other end of the expansion prevention pin is in contact with the outer periphery of the expansion moving unit and the gap fixing member. It is not rotated, and the force to be turned is applied in the reverse direction as it is caught by the expansion moving unit and the gap fixing member in the reverse direction. Therefore, the force that presses one end coupled to the pin hole of the expansion prevention pin 320 in the direction on the central axis of the fixing head is applied, and when the elastic force is applied by the elastic member, the fixing inserted into the anchor hole through the expansion prevention pin As the rotational expansion of the fixing blade is restricted at the position, even if the binding of the wire band is released, the rotational expansion does not occur rapidly, and in the process of completely removing the expansion prevention pin from the pin hole, it is possible to gradually expand the fixing blade at the desired fixing position. That is, it is possible to adjust the rotational expansion speed of the fixing wing according to the removal speed of the expansion prevention pin.

On the other hand, as shown in FIG. 10, when the part facing the ground side of the fixing wing is configured to swing and expand, one end of the expansion prevention pin is fixed by being fitted into the pin hole of the fixing wing, and the other end is a string or string (wire). By connecting and fixing the banded ring parts to each other or by connecting a string or string to each bent ring part of the expansion prevention pin, it is configured to lead to the outside of the ground side so that the expansion prevention pin always maintains a vertical state. The wire band is also provided to release the binding of the fixing wing while simultaneously or individually pulling out the extension preventing pin and releasing it from the ring-shaped ring of the wire band.

On the other hand, the wire band 310 of the expansion prevention means 300 as described above may be replaced with a tie band in the field to bind the fixing wing. When binding the tie band, the end of the extension prevention pin is bent so that the tie band is damaged by the bent end during the removal of the extension prevention pin and the binding of the fixing wing is released. When using a band, the expansion prevention pin cannot be bound to the pin hole of the fixation wing, and the same effect can be obtained even when used by binding the extension pin to the outer edge of the fixation wing by a tie band. However, since the elastic force due to the elastic member is generated simultaneously with the release of the binding, a sharp rotational expansion of the fixing wing may occur.

Further, as shown in FIG. 15, the lower end of the expansion prevention pin 320 of the expansion prevention means 300 toward the outer periphery of the anchor head 110 or the anchor cap 140 passes through the pin hole of the fixing wing that is bound by a wire band. It is also preferable to further configure the pin fixing part 400 formed on the same axis as the pin hole to be fitted to maintain a more stable binding force of the expansion prevention pin to prevent the rotational expansion and separation and separation of the fixing wing before fixing.

On the other hand, when the expansion head unit and the expansion moving unit in which the first and second rotational turning parts 228 and 248 are formed in addition to the above-described embodiments 1 to 3 are simultaneously applied, the fixing wing does not substantially work, so the use is poor, and the expansion As shown in FIG. 11, the expansion moving unit 240 is configured such that the two expansion moving units 240 without the seating groove 241 configuration of the expansion moving unit 240 are integrally configured to be left and right symmetrically. 240) of the second engaging extension 242 and the second guide inclined surface 245 are formed symmetrically, and the wire through hole 246 in the center is transformed into a two-stage expansion moving unit 240 ' through which it is formed, horizontally When expanding, it is preferable to configure the fixing blades in two rows to further expand the contact area to the ground side of the inner edge of the anchor hole so as to more effectively exhibit the holding strength.

As shown in FIGS. 12 to 14, the two-stage extended moving unit 240' is on the same axis between the extended head unit and the extended moving unit 240 coupled to the nail tip and the nail axis. coupled, and the fixing wings 210 are combined in this order with the expansion head unit, the two-stage expansion moving unit, the two-stage expansion moving unit and the expansion moving unit to form the fixing wings in two rows, so that the expansion moving unit according to the action of the elastic force of the elastic member and the two-stage expansion moving unit moves along the nail axis toward the extension head unit, and the fixing wing extends parallel to the nail axis toward the inner periphery of the anchor hole. It is provided to expand into these two stages.

Therefore, the configuration in which the extension direction of the fixation wing can be selected according to the present invention is a soil nail by selecting the direction of the fixation wing that can secure a large holding force according to the ground characteristics at the time of construction of the soil nail for ground reinforcement. As it can be directly applied to construction, the construction quality of the nail nail for ground reinforcement can be improved.

In addition, as it is possible to select the extension direction of the anchoring wing of the nail tip fixing part of the soil nail, it is not necessary to separately manufacture the anchorage in consideration of the extension direction of the anchoring blade according to the ground characteristics of the site where the anchor hole is drilled. By replacing the bay, the expansion direction of the fixing wing can be changed according to the characteristics of the ground, so that it is possible to reduce the manufacturing cost and the construction cost.

Furthermore, according to the present invention, it is possible to secure the holding rigidity according to the construction by selecting the expansion direction of the fixing wing according to the ground characteristics, so that it is possible to prevent the nail nail from leaving the anchor hole during the tensioning process, and to reconstruct due to the defect caused by the ground reinforcement. It is self-evident that it is possible to respond more effectively to ground reinforcement as well as to reduce construction cost and shorten construction time.

In the above, the present invention has been described in detail as one embodiment, but the scope of the present invention is not limited thereto, and it is clear that a number of variations and modifications are possible by those skilled in the art within the scope of the technical idea, It will be included to a range substantially equivalent to the embodiment of the present invention. The technical features will be described in detail.

A : Anchor hole F : Nail tip fixing part
100: nail
200: expansion unit 210: fixing wing
212: pin hole 214: uneven surface
216: slope 218: jamming step
219: rotating curved part 230: grip member
220: expansion head unit 221: nail fixing hole
222: first engaging extension 223: first wedge surface
224: first engaging surface 225: first guide inclined surface
228: first rotation turning unit 240: expansion moving unit
241: anchor groove 242: second locking extension part
243: second wedge surface 244: second engaging surface
245: second guide inclined surface 246: nail through hole
248: second rotation turning unit 240 ': two-stage expansion moving unit
250: gap fixing member 260: elastic member
300: expansion prevention means 310: wire band
312: ring-type ring 320: expansion prevention pin
400: pin fixing part

Claims (4)

A nail tip fixing part (F) inserted and fixed inside the anchor hole (A), and the tip of the nail tip fixing part (F) is coupled to the nail tip fixing part (F) and protruding alternately semicircular protrusions are formed on the outer periphery to be inserted into the anchor hole A nail 100 formed of a deformed reinforcing bar as usual, an injection hose extending from the inside of the anchor hole to the ground for grouting injection into the anchor hole, and coupled to the rear end of the nail, the anchor hole (A) corresponds to the ground on the ground side In the soil nail formed with a nail fixing part provided so that the rear end is fixed to the ground by applying a tensile force and maintained in a state in which the tensile force is applied, the nail tip fixing part (F) of the soil nailing is located on the bottom side inside the anchor hole (A) One side is fixedly coupled to the tip of the nail 100 positioned and inserted into the anchor hole, and the other side is provided to move on the axial line at the outer periphery of the nail. and an expansion unit 200 provided with an elastic member so that an elastic force is applied to move the anchor hole on the axis of the nail to the bottom side of the anchor hole so that the fixing wing is expanded in a selected direction; and the expansion unit 200 has a cylindrical shape A plurality of fixing wings 210 that are divided into four in the axial direction and are expanded and deployed toward the ground side of the inner periphery of the anchor hole (A) to be penetrated and fixed; A nail fixing hole 222 formed in a cylindrical shape and positioned on the inner bottom side of the anchor hole (A) and having a tab formed so that the tip of the nail inserted into the anchor hole is coupled and fixed is located in the center of one surface facing the ground direction of the anchor hole an expansion head unit 220 formed so that the fixing wing is selectively extended to the bottom or the ground side of the anchor hole; A concave groove 212 corresponding to the protrusion shape protruding from the outer periphery of the nail tip is formed on the inner periphery so that it is divided into halves or three parts in a cylindrical shape so as to be coupled to the nail tip. a grip member 230 having a tab 214 formed thereon; The nail guide hole 242 is formed in a cylindrical shape and coupled to the outer periphery of the nail so as to be movable along the nail axis, and one end of the elastic member is placed on one surface facing the ground side of the anchor hole to apply an elastic force. An expansion moving unit 240 provided with a groove 244 is formed, and the fixing wing 210 works together with the expansion head unit 220 to selectively expand to the bottom or the ground side of the anchor ball; A gap fixing member 250 provided to support and support the nail so that the nail does not come into contact with the inner edge of the anchor hole by being coupled on the same axis to the nail on the outer periphery of the nail on one surface of the expansion moving unit 240 facing the ground side of the anchor hole; Elasticity coupled to the outer periphery of the nail between the rear end of the expansion moving unit 240 and the gap fixing member 250, and applying an elastic force in the direction of the expansion head unit 220 with respect to the gap fixing member 250 a member 260; The expansion head unit 220 of the elastic member 260 by preventing the fixing wing 210 from separating away from the axis of the anchor hole and turning and expanding before fixing, and preventing separation and separation and pivoting expansion of the fixing wing. The expansion prevention means 300 is formed so that the application of elastic force in the direction is limited, and the expansion prevention means 300 is formed of a wire so as to bind the four divided fixing wings into one bundle, so that the ring-shaped rings 312 are formed at both ends. a formed wire band 310; The wire band 310 is formed with an anti-expansion pin 320 that is fitted to the ring-shaped ring 312 so that the bond of the wire band 310 is maintained without breaking, so that the anti-expansion pin is fitted to the ring-shaped ring 312 of the wire band 310. And it is formed to intermittently expand the rotation before the elastic force is applied by the elastic member of the fixing blade according to the release, and the fixing blade 210 is formed to have a cross section in the shape of an arc by dividing a cylindrical shape into four in the same direction as the axial direction. , is formed long in the left and right longitudinal direction in the center of the cross-section of the fixing wing in an arc shape, and the expansion prevention pin 320 of the expansion preventing means 300 provided to prevent separation and separation and turning expansion of the fixing wing is fitted with a pin hole 212 class; A plurality of concave-convex surfaces provided to increase friction when the anchor hole penetrates the surface of the anchor hole on the outer circumferential surface of the arc-shaped fixation wing and to prevent the wire band of the expansion prevention means 300 from being separated down the axis of the fixation wing while being bound to the outer edge of the fixation wing. (214) and; When a force is applied to the expansion moving unit 240 in the axial direction on the side of the expansion head unit 220 by the elastic member 260, the inner edge of the anchor hole on the side of the expansion head unit or the elastic member, which is the outer periphery of the arc-shaped fixation wing. an inclined surface 216 symmetrically formed on the inner periphery of both ends in the longitudinal direction so as to extend toward the outer periphery of the paper; a symmetrically formed engaging step 218 so that the fixing wings are caught in parallel between the extended head unit 220 and the extended moving unit 240 toward the end of the left and right inclined surfaces 216; One end of the left and right ends of the fixation wing is formed of a circular arc-shaped rotating curved portion 219 provided to smoothly pivot between the turning operations of the fixation wing without turning interference.
The extension head unit 220 includes a nail fixing hole 221 formed in a cylindrical shape so that the nail is fixedly coupled to the center of one surface by the grip member 230; A first wedge surface 223 is formed on the outer edge of the nail fixing hole 221 to correspond to the inclined surface 216 of the fixing wing 210 so that the fixing wing extends toward the inner edge of the anchor hole, and the first wedge surface is one end of the other side. A first engaging extension 222 formed so that a vertical first engaging surface 224 is formed at a point ending from the engaging step 218 of the fixing wing 210 to be engaged; From the lower end of the first engaging surface 224 of the first engaging extension 222, the nail fixing hole 221 is formed to be inclined upward toward one side of the outer periphery in the opposite direction, and together with the first wedge surface 223, the fixing wing ( 210) is formed as a first guide inclined surface 225 provided to extend and guide the anchor hole to the inner edge of the ground, the first guide inclined surface 225 vertically protrudes on one surface to form a turning reference point of the anchoring blade 210, and the anchoring blade ( One surface of the rotational curved part 219 of 210) is caught while in linear contact, and as the elastic member 260 applies an elastic force in an axial line, the linearly contacted one surface is supported and caught in a direction opposite to the elastic force (219) A first rotational turning part 228 provided so that one end of the fixing wing 210 on the opposite side of the fixing wing 210 pivots along the curved surface of the anchoring wing 210 toward the ground side of the anchor hole; is further formed and the expansion head unit 220 Acupressure-type soil nails capable of a selective expansion direction, characterized in that the first rotational turning portion 228 of the settling wing is a pivotal point of rotation.
The method of claim 1,
The expansion moving unit 240 is formed in a cylindrical shape and is recessed so that one end of the elastic member 260 coupled to the nail axis is seated on the rear side opposite to the front side facing the expansion head unit 241, and ;
A second wedge surface 243 is formed so as to correspond to the inclined surface 216 of the anchoring wing 210 toward the outer edge of the front end facing the expansion head unit, and the anchoring blade is extended toward the inner edge of the anchor hole, and the second wedge surface is a second engaging extension 242 formed so that a vertical second engaging surface 244 is formed at a point ending from the other end so that the engaging step 218 of the fixing wing 210 is engaged;
From the lower end of the second engaging surface 234 of the second engaging extension 242, it is formed to be inclined upwardly toward one side of the outer edge in the direction in which the seating groove 241 is formed, and the fixing wing 210 together with the second wedge surface 243. a second guide inclined surface 245 provided to expand and guide the anchor hole to the inner edge of the ground;
The nail through hole 246 is formed so that the nail passes through the center of the second locking extension 242 from the center of the seating groove 241;
Like the first rotational pivot 228 of the expansion head unit 220, the second guide inclined surface 245 vertically protrudes on one surface to form a pivot point of the fixing blade 210, and the rotational curved portion of the fixing blade 210 (219) One surface is caught while in linear contact, and as the elastic member 260 applies an elastic force on the axis, one surface in linear contact is supported and caught in a direction opposite to the elastic force. A second rotational part 248 provided such that one end of the fixing blade 210 on the opposite side is rotated while the fixing wing 210 is rotated toward the ground side of the anchor hole; a second rotational line of the expansion moving unit 240 is further formed It submitted 248 are selectively expandable pressure type soil four days direction, characterized in that the reference point which is the turning of the fixation wings.
3. The method of claim 2,
The nail tip is fixedly coupled to the expansion head unit 220 including the first rotational turning part 228 by the grip member 230, and the extended moving unit 240 without the second rotational turning part 248 configuration. ) is provided to move on the axial line toward the expansion head unit by the elastic member 260 , the fixing wing 210 moves to the elastic member 260 side based on the first rotational part 228 of the expansion head unit 220 . One end of the fixing wing 210 of the anchor hole is rotated and expanded toward the ground side and penetrated and fixed,
The nail tip is fixedly coupled to the expansion head unit 220 without the first rotational turning part 228 by the grip member 230, and the expansion moving unit 240 including the second rotational turning part 248 configuration. ) is provided to move on the axial line toward the expansion head unit by the elastic member 260 , the fixing wing 210 is the elastic member 250 on the basis of the second rotational part 248 of the expansion moving unit 240 . The other end of the fixing wing 210 of the anchor hole is rotated and expanded toward the ground side and penetrated and fixed,
The nail tip is fixedly coupled to the expansion head unit 220 without the first rotational turning part 228 configuration by a grip member, and the expansion moving unit 240 without the second rotational turning part 248 configuration is an elastic member. When provided to move on the axial line toward the expansion head unit by the 260, the fixing wing 210 expands and deploys the concave-convex surface 214 correspondingly to the ground side of the anchor hole in the horizontal direction on the axial line. Selective expansion, characterized in that Acupressure-type soil nails that can be directional.
3. The method of claim 2,
The expansion moving unit 240 includes a second engaging extension 242 of the expansion moving unit 240 and a second extension moving unit 240 without a seating groove 241 configuration so that the two expansion moving units 240 are symmetrically configured integrally. Two guide inclined surfaces 245 are formed symmetrically, and a second row expansion moving unit 240 ′ having a nail through hole 246 in the center is further formed,
The second row expansion moving unit 240 ′ is coupled to the outer periphery of the nail on the same axis between the expansion head unit side and the elastic member side between the fastening and seating expansion moving units, and the fixing wings 210 are coupled to the expansion head unit and 2 Thermal expansion and movement unit 240 ', between the second row of expansion and moving unit and the expansion moving unit are coupled to the outer edge of the nail, and the irregularities of the two rows of fixing wings are extended toward the ground side of the inner edge of the anchor hole, so that the contact area is expanded to two rows Acupressure-type soil nail with optional extension direction.

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