KR101241351B1 - The nail with high anchorage and the nailing construction method thereof - Google Patents

Abstract

PURPOSE: A nail with an excellent gripping force and excellent workability and a construction method thereof is provided to improve the gripping force at an end portion due to the blowing portion of an expansion portion during nail construction. CONSTITUTION: A nail with an excellent gripping force comprises a support portion(100) and a head portion. The support portion is separated a long support portion and a front support portion and is connected with a coupler. The head portion comprises a fixed body(210), an expansion portion(230), a front case(240), and a fixture(250). The fixed body comprises an outer taper and an inner taper. The expansion portion is expanded in order to prevent the pullout of the nail by a fixed wedge inserted around. The front support portion is fixed on the fixed body and includes a stopper(241) protruded to an internal space. The fixture is fixed on one side of the support portion and includes a female screw penetrated by a bolt in order to insert a bolt.

Description

The nail with high anchorage and the nailing construction method

The present invention relates to a nail having excellent fixing ability and a nailing construction method using the nail, comprising a support part composed of screw reinforcement, and comprising a head part including a fixing part, an expanding part, a fixing body, a tip case, The fixture is penetrated through the inside, and consists of a bolt extending from the side to the inner space, the expansion portion is a cylindrical shape penetrated inside, divided into a plurality in the circumferential direction, a plurality of circular springs are installed on the outer periphery, The inner space of the enlarged part is formed as a space that becomes wider from one end to the other end, and the outer surface of the expanded part forms a protruding fixed wedge, and the fixed body has a cylindrical shape penetrating the inside, and its outer circumference is from one side to the other side. The outer taper becomes wider and wider, and the tip case is empty inside and has one end, and a plurality of stoppers protrude into the inner space. The structure is composed of a fixed structure, the fastener is fixed to one side of the support, the extension, the fixed body, the front end case is assembled in order, the outer taper of the narrow side is located in the wide space of the extension, the front case is fixed It is fixed to the body, the nail of the structure that is configured in the position that the end of the support portion does not pass through the stopper of the tip case is configured, the nail is installed in a hole drilled in the construction of the slope or the soil barrier, the support portion protruding to the ground With the expansion of the extension part and the fixing of the fixing wedge to the punching hole by hitting, the fixing force of the tip is excellent and the construction is easy to provide the nail.

In general, in tunnel construction, slope reinforcement work, rockfall prevention work, slope greening work, digging construction, etc., reinforcement work or mudstone work is performed to prevent soil from falling down. While reinforcing, prevent the arms and soil from falling down.

Representative methods of slope reinforcement and earthquake construction include ground anchor method, rock bolt, and saw nailing, all of which are drilled at the place to be drilled, and rebar (in addition to rebar, rock bolt, saw nailing method or earth anchor) And a separate nail or ground anchor developed according to the method), and grouted and cured the perforated interior, and the ground anchor is fixed by applying a tensile force to an externally embedded reinforcement after curing of the grouting. There is a characteristic.

Among them, the Soil Nailing is a reinforcement method using reinforcing bars. It is a method of reinforcing local soil using a rod-shaped reinforcement (nail) to withstand shear forces of cut slopes. It forms a function of gravity retaining wall, so the slope is kept stable.

Looking at such a nail nailing method or a nail related to this nail nailing, first, in the domestic patent registration No. 0978629, the fixing head which is the tip of the nail is settled at the end of the perforated nail ball, and the fixing wing is extended Slope reinforcement nailing of roads and complexes in which structure is driven by surface contact and generates fixing force is posted.

In addition, the Korean Patent Registration No. 0998588, a nail tip anchoring mouth comprising a plurality of wedge-type expansion member constituting the tip of the nail, anchor holes drilled by the expansion of the plurality of expansion members during the construction of the saw nailing The multipurpose nail tip anchorage of the saw nailing structure fixed to the ground has been posted.

However, when the nail nailing construction using nailing is performed according to the first exemplary patent, after nailing construction, there is a high possibility that nailing constructed by acupuncture or earth pressure will be drawn to the ground. If the embedded part is soft ground or cohesive soil, when the drawing force is applied to the nailing, even though the fixing wings are further extended by the first and second inclined portions, the fixing wings are in surface contact with the nail holes. There was a big problem that the nailing to be drawn even with a small pull force.

In addition, since the multi-purpose nail tip fastener according to the second exemplary patent has a somewhat complicated structure, the depth of the anchor hole drilled for the installation of the nail is deep, and the inner surface of the anchor hole is uneven, which may cause malfunction. There was a concern that the operation accuracy of the nail tip fitting was inferior, and even if the extension member was extended along the tapered surface of the nail fixing head, the extension member had a hinged structure with the connecting pivot bar, and the connecting pivot bar had a hinged structure with the compression member. Therefore, there is a big problem that the connecting pivot bar may be broken if a force or a twist in the vertical direction with respect to the longitudinal direction of the connecting pivot bar is applied.

In addition, in the case of using a conventional nail in the retainer according to the existing method of the nail nailing method, it is preferable to remove the nail after the use is finished in the retainer, the existing common nail is not easy to remove the problem There was this.

Therefore, the present invention is to solve the above problems, comprising a support consisting of a screw reinforcing bar, including a fastener, an extension, a fixed body, a tip case comprising a head, the fastener penetrates the inside, the inner space at the side It consists of a bolt that extends up to, and the extension part is a cylindrical shape penetrating the inside, divided into a plurality in the circumferential direction, and a plurality of circular springs are installed on the outer circumference, and the inner space of the extension part becomes wider from one end to the other end. It is formed as a losing space, and the outer surface of this extension forms a protruding fixed wedge, and the fixed body has a cylindrical shape penetrating the inside thereof, and its outer circumference forms an outer taper extending from one side to the other side, and the tip case. The inside is empty and has one end, and is composed of a structure formed with a plurality of stoppers protruding into the inner space, The fixture is fixed, and the expansion part, the fixed body, and the tip case are assembled in sequence,
When the extension is fitted to the stationary body, a narrow portion of the outer taper of the stationary body is inserted into a wider portion of the inner cross section of the enlarged body, and finally a portion of the wider inner cross section of the enlargement portion is extended to the wider portion of the outer taper of the stationary body. It is assembled in position, the front end case is fixed to the fixed body, the nail of the structure is assembled so that the end of the support is positioned in a position that does not pass through the stopper of the front end case,
The nail is installed in the perforated hole in the construction of the slope or the soil barrier, and by hitting the support projecting to the ground, by the expansion of the expansion portion and the fixing of the fixing wedge to the drilling hole, the fixing force of the tip is excellent, and the construction is easy Give your nails.

In addition, the support portion of the nail has a structure that is separated into two, by a protective portion surrounding the support portion, to facilitate the removal of the support portion after the construction of the earthen using a nail.

As described above, in the nailing construction using the nail, the tip fixing force is high by the expansion of the expansion part through the hitting.

In addition, the nail, by the structure of the support portion separated into two, and the protective portion surrounding the support portion, it is easy to remove the support portion after the construction of the earthen using the nail.

1 is a perspective view of a head portion of a nail in accordance with the present invention.
Figure 2 is a perspective view of the head portion of the nail expanded state of the present invention.
Figure 3 is a cross-sectional view showing a cross-section constructed according to the nailing construction method applied to the slope using the nail according to the invention.
Figure 4 is a cross-sectional view showing a section constructed in accordance with the nailing construction method applied to the earthen using a nail according to the invention.
5 is an enlarged cross-sectional view of a portion A of FIG. 4.
6 is an enlarged cross-sectional view of a portion B of FIG. 4.
Figure 7 is a plan view showing the nailing construction process using the nail and acupressure plate attached sheath according to the present invention and an enlarged perspective view of the acupressure plate attached sheath.
8 is a process chart according to the nailing construction method for applying the nail according to the present invention on a slope.
Figure 9 is a process chart according to the nailing construction method for applying the nail according to the present invention construction.

The present invention relates to a nail having excellent fixing ability and a nailing construction method using the nail, comprising a support part composed of screw reinforcement, and comprising a head part including a fixture, an extension part, a fixed body, a tip case, and a fixture The inner part penetrates and consists of a bolt extending from the side to the inner space, and the extension part is a cylindrical shape through which the inner part is divided into a plurality in the circumferential direction, and a plurality of circular springs are installed at the outer periphery, The inner space of the part is formed as a space that becomes wider from one end to the other end, and the outer surface of this extension forms a protruding fixed wedge, and the fixed body has a cylindrical shape penetrating the inside, and the outer circumference thereof is from one side to the other side. It forms an outer taper that widens, and the tip case is empty inside and one end is open, and a plurality of stoppers protrude into the inner space. And consists of the generated structure, the fastener is fixed to the support portion side, the accuracy gaebu, stationary body, the front end case in that the fastener is assembled in this order,
When the extension is fitted to the stationary body, a narrow portion of the outer taper of the stationary body is inserted into a wider portion of the inner cross section of the enlarged body, and finally a portion of the wider inner cross section of the enlargement portion is wider to the outer taper of the fixed body. It is assembled in position, the front end case is fixed to the fixed body, the nail of the structure is assembled so that the end of the support is positioned in a position that does not pass through the stopper of the front end case,
The nail is installed in the perforated hole in the construction of the slope or the soil barrier, and by hitting the support projecting to the ground, by the expansion of the expansion portion and the fixing of the fixing wedge to the drilling hole, the fixing force of the tip is excellent, and the construction is easy Provide nails.

Nail according to the present invention is composed of a support and a head, and when using the nail in a removable manner further comprises a coupler, a protector, a pressure plate attached sheath.

First, referring to FIG. 3, the support part 100 will be described. The support part 100 is made of steel bars, rebars, or threaded reinforcement bars. If the (100) is composed of a screw rebar, it is not necessary to form a separate male screw.

In addition, the support part 100 is integrally formed with one length when used in a buried type, and when the support part 100 is used as a removable type, one side of the support part 100 is separated, and the long long support part ( 120), a short end support portion 110, and constitutes a male screw on both sides or as a whole of the long support portion 120, the front end support portion 110 forms a male screw on both sides or as a whole.

In addition, the support portion 100 separated into the long support portion 120 and the tip support portion 110 is connected by a coupler 130, as shown in Figure 5, the coupler 130 is formed in a cylindrical shape, The female screw is formed at both ends thereof, and the long support part 120 and the tip support part 110 are screw-assembled at both ends of the coupler 130 to form the support part 100.

In addition, when the nail is used in a removable manner, the support part 100 is configured to be covered by the protection part 140. The protection part 140 has various structures, for example, a protection part ( 140 simply consists of a pipe (pipe) shape surrounding the support part 100, or a structure coated with a male screw formed on the outer periphery of the support part 100, and a structure having a female thread formed inside the protection part 140. Or, or a structure that is coated on the outer periphery of the support portion 100 of the screw reinforcement, and has a structure in which a female thread is formed inside the protection unit 140, the end of the protection unit 140 is a closed cover that is in close contact with the tubular shape If the support part 100 is separated into the long support part 120 and the tip support part 110, the protection part 140 is comprised in the long support part 120, The protection part The end of the 140 is located up to the coupler 130, the protector 140 and the coupler 130 is sealed cover 143 It is configured to be closed by.

In addition, as shown in Figure 4, the protection unit 140 is configured to be separated into a tubular tubular protection unit 141 and the female thread protection unit 142 formed with a female thread therein, the female thread protection unit 142 after The tubular protection part 141 is configured to the head part 200 following the female thread protection part 142, and the female thread protection part 142 is comprised in the support part 100 on the opposite side of the head part 200 demonstrated. The portion that is not tensioned by the tensile force, the tubular protection portion 141 has a length of 4 to 5 times longer than the female screw protection portion 142.

6, the tubular protection part 141 covers the female screw protection part 142 at the part where the tubular protection part 141 meets the female screw protection part 142, and the tubular protection part 141 is shown. The female screw protector 142 is configured in a sealed structure by a sealing 144, such as an O-ring, the end of the tubular protection unit 141 is configured to be closed by a tubular sealing cover 143, the support ( When the 100 is separated into the long support portion 120 and the tip support portion 110, the tubular protection portion 141 and the female screw protection portion 142 is formed in the long support portion 120, female screw protection portion 142 The end of the coupler is located up to 130, the female screw protector 142 and the coupler 130 is configured to be sealed by a sealing cover 143, so the tubular protective part 141 and the female screw protector 142 separated The nail having the protected portion 140 is suitable for the nailing construction to apply a tensile force to the support portion 100 of the nail installed, this content will be described later It will be described in detail in the ball way.

Next, the head 200 is composed of a fixed body 210, extension 230, the tip case 240, a fastener 250, etc., as shown in Figures 1 and 5, the fixed body ( 210 is a shape of a cone through which the inside penetrates, and the outer surface forms an outer taper 211 having a slope formed by a structure in which the cross section becomes wider from one side to the other side, and a wide cross section is formed in the fixed body 210. On the inner circumference of the side, the inner thread 213 and the inner taper 212 having a wider space toward the female screw 213 on the inner circumference of the inner thread 213 are sequentially formed.

And the wedge 220 is assembled to the inner taper 212 of the fixed body 210, the wedge 220 is a structure that is penetrated in a cylindrical shape, the inner periphery of the penetrating to form a protrusion (or a female screw), The cross section forms a thickness widening from one end to the other end, and the wedge 220 is composed of a plurality of structures along the circumferential direction, and as shown in FIG. 5, a fixed body on one side of the support part 100. Wedge 220 is assembled to the inner taper 212 of the 210, but the fixed body 210 is assembled in a direction having a cross-section widening toward the end of the support portion 100, the thick of the wedge 220 A portion having a thickness is assembled to be positioned toward the side in which the female screw 213 of the fixed body 210 is formed.

1 and 2, the extension part 230 has a cylindrical shape penetrating through the cylinder and is divided into a plurality of parts along the circumferential direction. It is formed in a space that becomes wider from one end to the other end, the space inclination of the inside of the extension 230 is formed to be equal to the slope of the outer taper 211 of the fixed body 210, the outer surface of the extension 230 There are a plurality of fixing wedges 231 protruding along the circumferential direction in the longitudinal direction, as shown in Figure 2, the cross section of one fixing wedge 231 is in the shape of a triangle, The inner space of the 230 becomes narrower toward the wider side, and wider toward the other side thereof, respectively, and is formed in a cross-sectional shape of the triangle, and the extension portion 230 is enlarged so that the fixing wedge 231 is nailed around to prevent the drawing of the nail. do.

In addition, the spring, the circular spring 232 having a circular structure is further provided, the divided extension 230 is a plurality of circular springs on the outer periphery of the extension 230 in a state assembled into a cylindrical ( 232 to assemble, such that the extension 230 maintains a cylindrical shape.

In addition, as shown in Figures 1 and 5, the front end case 240 is a hollow cylindrical inside, one end is blocked, the other end is open structure, the male thread is formed on the outer periphery of the open side, On the blocked side, the stopper 241 protrudes into the inner space. The stopper 241 can be simply formed by making a cut in the blocked side of the fixture 250 and pushing the cut-in portion into the fixture 250. 241, a plurality of stoppers 241 are configured along the protruding portion of the fixture 250.

As shown in Figs. 1 and 5, the fastener 250 forms a penetrated female screw, and bolts 251 (headless bolts or screws) are fitted to the female screw on the side thereof.

Fixing body 210, extension portion 230, the tip case 240, the fastener 250 is fitted to one side of the support portion 100, or the tip support portion 110 to configure the head portion 200, 1, 2 and 5, the fastener 250 is screwed to the support portion 100, and the expansion portion 230 to the support portion 100 to fix the fixed body 210 in order, Expansion portion 230 is a small size of the space side is positioned toward the fastener 250, the fixed body 210 is assembled wedge 220 on the inner circumference, the outer taper 211 side having a relatively narrow cross-section The expansion unit 230 is coupled to the wide space side, but only the extent to which the divided expansion unit 230 does not open, the front end case 240 is screwed to the fixed body 210, the stopper 241 is the support portion Adjust the position (holding portion does not exceed the stopper) holding the end of the 100, to adjust the position of the fixture 250, extension 230, the tip case 240 Establish, a bolt 251 of the fastener 250, when sin come to secure the position support portion 100, and the configuration of a nail with a head 200 to the support 100 is assembled.

In other words, on one side of the support part 100, the fastener 250, extension 230, fixed body 210, the tip case 240 are assembled in sequence to form a nail, the nail is configured as a head (200) When hitting the support part 100 of the other side instantaneously, as shown in Figures 1 and 2, the fixed body 210 and the tip case 240 maintains the original position, the support part 100 and the fixture 250 and the extension 230 is moved in the direction of striking, the fastener 250 is moved to the part touching the fixed body 210, the end of the support portion 100 protrudes more than the stopper 241, The extension part 230 moves along the inner taper of the fixed body 210 to expand the extension part 230. At this time, the pressure part is inserted into the support part 100 opposite to the head part 200, and the part around the pressure plate is different. While maintaining the state supported by the nut 500 to the end of the support portion 100, the support portion 100 is pulled, the wedge 220 is fixed, D 210 and is pulled tip case 240, and the fixed body 210 is moved along the inner side expansion gaebu 230, has a structure that further widening the expansion gaebu 230.

Prior to describing the nail construction method using the nail constructed as described above, the pressure plate, the nut 500, the spacer 600, the reinforcing mesh 700, etc. necessary for the construction will be described as follows.

First, the acupressure plate is a plate structure formed with a through hole, according to the form, the flat plate 300, the inclined pressure plate 310 is used, and the pressure plate attached sheath 400 is further configured as an auxiliary of the pressure plate, First, as shown in Fig. 3, the flat pressure plate 300 is a pressure plate formed with a hole 301 penetrated through a plate having a flat structure like a conventional pressure plate.

4 and 7, the inclination pressure plate 310 is formed so that the through hole 311 corresponds to the angle of the drilling hole 900 for drilling the nail for installation, the bottom surface is flat And, the upper portion of the inclination pressure plate 310 is a pressure plate to form an inclination so that the hole 311 is perpendicular to the angle through which.

In addition, as shown in Figures 4 and 7, the pressure plate attached sheath 400 is a structure in which the sheath 420 and the lower pressure plate 410 is integrated, the lower pressure plate 410 is configured in a plate shape, The hole 411 is formed in the center, the hole 411 is formed to correspond to the angle of the drilling hole 900 for drilling the nail for installation, the upper portion of the hole 411 of the lower pressure plate 410 The tubular sheath 420 is integrally assembled so that the sheath 420 has an inclined shape such as the slope formed by the hole 411, and the end of the sheath 420 is parallel to the lower pressure plate 410. Has a structure.

In addition, the acupressure plate-mounted sheath 400 is mainly applied to the nail construction including the shotcrete (800, 810), the acupressure plate-mounted sheath 400 is a flat pressure plate 300 or inclined acupressure plate 310 It is used as), the area of the lower pressure plate 410 has a larger area than the flat pressure plate 300 or the inclined pressure plate 310.

Next, as shown in Figs. 3 and 4, the nut 500 has a conventional nut structure in which a female thread is formed at a penetrated inner circumference, and a bottom portion is formed in a hemispherical shape, and the nut 500 is used. Is a structure that is screwed to the support portion 100 of the nail, it is configured in a size that does not pass through the holes 301, 311 of the pressure plate.

In addition, as shown in Figure 4, the spacer 600 is to maintain the distance between the support portion 100 and the drilling hole 900 of the nail inserted into the drilling hole 900, various kinds of spacers in the market Therefore, detailed description is omitted.

And, as shown in Figure 7, the reinforcing mesh 700 is a wire mesh, such as a resin coated wire mesh, the reinforcing mesh 700 is applied to the construction of the earth wall including the shotcrete (800, 810) In order to reinforce the tensile force of the shockcrete, when the reinforcing mesh 700 further uses the reinforcing bar 710, the tensile force may be further reinforced.

The method of constructing the nail using the acupressure plate, the nut 500, the spacer 600, and the reinforcing mesh 700 provided as described above will be described, but the nail construction applied to the general slope and the nail construction applied to the soil barrier will be described separately. In the nail application applied to the slope, the structure of nail installation and permanent embedding, the tensioning method and structure after nail installation are explained, if necessary, and the structure of nail installation and permanent embedding in the nail construction applied for the mudguard. It will be described, and, if necessary, the tensioning method and structure after the nail installation, the removal method of the support portion 100 and the like.

First, referring to the process diagram of FIG. 8 and FIG. 3, a nail construction applied to a general slope will be described. The construction surface should be uniform according to the condition of the slope.

On the other hand, prior to the next drilling step (S1), according to the number and spacing of the nails installed in accordance with the state of the slope, marking (marking) the position where the nails are installed in advance (perforation and nail installation) It is easy.

Next, the puncturing step (S1) is a step of puncturing at an appropriate depth in the place where the nail is to be previously installed, and the puncturing is preferably performed in a vertical direction or an appropriate angle with respect to the slope according to the state of the slope. The diameter of the drilling hole 900 is configured to be slightly larger than the diameter of the fixed body 210 of the nail.

In addition, the nail insertion and striking step (S2) is a step of inserting the nail into the previously formed punching hole 900, and expanding the extension portion 230 by hitting the end of the support protruding upwards, the support portion of the nail Spacer 600 is installed along the length of 100, and at least two hoses 610 (for grout material injection) are installed in parallel with the support part 100, and the head part 200 drills the nail. (900) Insert and install so that it is located at the end.

And when hitting the support portion 100 protruding on the ground, the support portion 100, the fastener 250, the extension portion 230 is moved, the extension portion 230 to the outer taper 211 of the fixed body 210 As it moves along and expands, the fixing wedge 231 of the expanding portion 230 is fixed while being stuck in the side of the drilling hole 900.

On the other hand, the drilling hole 900 drilled for nail installation is deep in the depth, in the process of inserting the nail, the support portion 100 during the process of passing through the unsmooth side of the head portion 200 of the drilling hole 900 Even if a light external force acts on), the stopper 241 is holding the end of the support 100 so that the extension 230 is not expanded.

The next shiatsu plate installation step (S3) is a step of installing the shiatsu plate to the support (100) protruding to the ground to contact the ground (slope), and the step of tightening the nut (500) to the support portion 100 to reach the pressure plate, At this time, the pressure plate to be used may be both the flat plate 300, the inclined pressure plate 310.

On the other hand, according to the state of the slope, a tension step (S4) may be added to apply a tensile force to the nail, the tension step (S4) to apply a tension force by further tightening the nut 500, when tensioning the support portion 100 , Support portion 100, wedge 220, fixed body 210, the tip case 240, and the fixture 250 is slightly moved toward the slope by the tension force, so fixed by the fixed body 210 that moves Since the opening portion 230 has a structure that is further expanded, the support portion 100 of the head portion 200 with respect to the drilling hole 900 becomes higher, and the support portion 100 is tensioned, and the stability of the sloped construction paper due to the tension of the nail is improved. Increase

Finally, the grouting and curing step (S5), injecting the grout material 910, such as cement paste or mortar through the hose 610, grouting the hole (900) to fill the grout material (injected) 910 completely fills the perforated hole, and the injected grout material 910 is cured at an appropriate time, and this step completes the nail construction method applied to the slope.

Next, referring to Figure 9 process diagram, Figures 4, 7, when explaining the nail construction applied to the general construction of the earth, first, the excavation and surface picking step (G0) to dig the ground, in order to do the general earth construction (Excavation), it is a step to select the surface to mount the nail.

In addition, the shockcrete step (G1) is a process of spraying shockcrete on the surface where the nail is to be constructed, and the tensile strength is reduced only by the shockcrete, so that when the shockcrete is sprayed, a short reinforcing fiber or a short steel wire is mixed with the shockcrete. In order to increase the tensile strength of the shock concrete or to spray the shock concrete divided into primary and secondary, so that the reinforcing mesh 700 is positioned between the shock concrete, the shock concrete reinforced with the reinforcing mesh 700 and its Referring to the installation of the pressure plate attached sheath 400 by the shock concrete in the following five processes are as follows.

First, the primary shock concrete process (F1) is a process of spraying the shockcrete 800 as a whole on the construction surface, the shockcrete 800 is sprayed to a suitable thickness and hardened over time, the shockcrete 800 is After hardening, according to the number and spacing of the nails installed, it is easier to install the nails by marking (marking) the position where the nails are installed in advance.

The following reinforcing mesh installation process (F2) is a process of laying the reinforcing mesh 700 on the shock concrete 800 cured previously, and subsequent acupressure plate attachment type sheath installation process (F3) is the acupressure plate attachment type in the position to install the nail In the process of installing the sheath 400, the lower acupressure plate 410 is placed in the lower place where the nail is to be installed earlier, the sheath 420 is placed at the angle of puncture, the upper portion of the sheath 420 is secondary It is preferable to temporarily block for the shockcrete process F5.

And the reinforcing bar installation process (F4) is a step of installing the reinforcing bar 710 over the reinforcing mesh 700 to pass through the lower pressure plate 410 of the pressure plate mounting type sheath 400 previously installed, a pair of reinforcing bars 710 The sheath 420 is positioned between the lower pressure plate 410 so that the rebar 710 fixes the position of the pressure plate attachment type sheath 400, while the shockcrete 800 is joined together with the reinforcing mesh 700. Enhance.

In addition, the secondary shockcrete process F5 is a process of spraying the shockcrete 810 to an appropriate thickness on the reinforcing mesh 700 and the reinforcing steel 710 installed in advance, and the pressure plate installed while spraying the shockcrete 810. The shockcrete 810 is sprayed to the height of the sheath 420 so that the shockcrete 810 does not flow into the sheath 420 of the attached sheath 400, and the shockcrete 810 sprayed in this manner is If cured sufficiently, the shockcrete step G1 is completed.

Meanwhile, the shockcrete step G1 according to the above-described primary shockcrete process (F1) to secondary shockcrete process (F5) uses general shockcrete 800 and 810, while reinforcing mesh 700 and reinforcing bars are used. 710 is a method of reinforcing, in the case of using a shockcrete (not shown) that includes a short reinforcing fiber or a short steel wire to reinforce the shockcrete, the nail is installed after the excavation and face picking step (G0) To mark the position, install the shim plate-mounted sheath 400, spray the shockcrete containing short reinforcing fibers or short steel wire to the height of the sheath 420, so that the shockcrete once sprayed Upon curing, the shockcrete step G1 is completed.

And the drilling step (G2) is a step of drilling the construction site to the appropriate depth through the sheath 420 of the pressure plate attached sheath 400 previously installed, the shock concrete (800, 810) at an angle that the sheath 420 has Passing through the surface to form a punching hole 900, the diameter of the punching hole 900 is a little larger than the diameter of the fixed body 210 of the nail.

Next, the nail inserting and striking step (G3) is a step of inserting the nail into the drill hole (900) formed above, and to expand the extension portion 230 by hitting the end of the support protruding upward, the support portion of the nail Spacer 600 is installed along the length of 100, and at least two hoses 610 (for grout material injection) are installed in parallel with the support part 100, and the head part 200 drills the nail. (900) Insert and install so that it is located at the end.

In addition, when hitting the support portion 100 protruding above the sheath 420 of the shim plate-mounted sheath 400, the support portion 100, the fixture 250, the extension portion 230 is moved, the extension portion 230 is It moves while expanding along the outer taper 211 of the fixed body 210, and the fixed wedge 231 of the extension portion 230 is fixed while being stuck in the side of the drilling hole (900).

On the other hand, the drilling hole 900 has a deep depth, in the process of inserting the nail, a light external force acts on the support portion 100 during the process of the head portion 200 passes through the non-smooth side of the drilling hole (900) Even if the stopper 241 is holding the end of the support 100, the extension 230 is not expanded.

And acupressure plate installation step (G4) is a step of installing the pressure plate in contact with the ground surface (slope) to the support portion 100 protruding to the ground, the step of tightening the nut 500 to the support portion 100 to reach the pressure plate, in this case Acupressure plate to be used are both flat plate 300, inclined pressure plate 310.

On the other hand, according to the state of the construction site where the earthquake is constructed, a tension step (G5) may be added to apply a tensile force to the nail, the tension step (G5) is applied to the tension force by further tightening the nut 500, the support portion 100 Tension), the support 100, the wedge 220, the fixed body 210, the tip case 240, and the fixture 250 is slightly moved toward the slope by the tension force, the movement of the fixed body 210 Since the extension portion 230 has a structure that is further expanded, since the support force (fixing force) of the head portion 200 with respect to the drilling hole 900 is excellent, the nail is not drawn even in the tensile force and the support portion 100 is tensioned. do.

In addition, in the tensioning step (G5), due to the installation of the pressure plate attached sheath 400, the bearing force due to the tightening of the nut 500 is dispersed in the lower pressure plate 410 and the pressure plate of the pressure plate attached sheath 400 Destruction of the shock concrete (800, 810) is minimized.

Next, the grouting and curing step (G6) is a step of injecting a grout material 910 such as cement paste or mortar through the hose 610, grouting and filling the drilling hole 900, the grout material to be injected ( 910 completely fills the perforated hole, and the injected grout material 910 is cured with an appropriate time, and this step completes the nail construction method applied to the construction of the soil film.

On the other hand, if the nail is removed after the completion of the earthen construction as necessary, the removal step (G7) is added, the nut 500 is removed from the support portion 100 protruding to the top of the pressure plate, and the support portion 100 When turned, the support part 100, precisely the long support part 120, is separated from the coupler 130, and is removed along the protection part 140 to escape to the outside.

As in the nail construction applied to the slopes and the soil barrier described above, the nail according to the present invention is easy to install by inserting and hitting the drilling hole 900, it is also possible to apply a tensile force depending on the state of the construction site, It is also easy to remove after the subsequent construction.

 In the nailing construction, when the nail used has the support part 140, and the support part 140 is divided into the tubular protection part 141 and the female screw protection part 142, the nail 140 Even if the construction site (slope or earth block construction site) to which the ring construction is applied is behaving, the tensile force is distributed to the support part 100 included in the female thread protection part 142 as well as to the acupressure plate (or lower pressure plate). According to the stress range, it is characterized by the high reinforcement function and stability of the construction paper due to the tension of the nail.

In addition, compared to the uncomplicated nail structure, it has excellent performance and accurate operability, and has an economic effect.

Such nails are constructed by the Institute of Construction (Gimhae, Gyeongnam) according to the present invention (hereinafter, the present invention nail), the ground space compression device (name of the invention: ground space compression device using the principle of spring and wedge) And a method of construction thereof and a method of removing a tension member connected thereto, hereinafter, a comparative invention nail), and a conventional nail (rebar used for nailing construction, hereinafter, general nail) in two environments, namely, earth and sand (weather soil). (Indicated by 'position 1') and soft rock (indicated by 'position 2'), respectively, and when the nail was installed in the drilled hole, the maximum load and yield load were measured by no grouting (reference, general Nails are made of reinforcing bars, which, unlike the other two nails, do not have a separate fixing head at the tip, so no value is measured in groutless), and also measured after grouting and curing. The results of measurement for treating of the yield load is shown in [Table 1].

Kinds Invention nail Comparative invention nail Plain nail Position1 Position2 Position1 Position2 Position1 Position2
Grouting Measuring load
(tonf) 3.5 10.5 3.5 10.0 · · Yield load
(tonf) 3.5 10.5 3.5 10.0 · ·
Grouting Measuring load
(tonf) 6.5 26.0 6.0 25.0 4.0 18.5 Yield load
(tonf) 6.5 26.0 6.0 25.0 4.0 18.5

As shown in Table 1 above, the nail according to the present invention is superior to the comparative invention nail in the maximum grind load and yield load in the grouting according to the installation position, and furthermore, the maximum and yield loads measured after grouting are compared to the invention. It is much better than nails and regular nails.

100: support 200: head
210: fixed body 220: wedge
230: extension 240: tip case
250: fixture 300: flat plate
310: inclined pressure plate 400: pressure plate attached sheath
500: nut 600: spacer
610: hose 700: reinforced mesh
710: reinforcement 800, 810: shockcrete
900 grout material

Claims (10)

In the nail composed of a support having a normal nail length, the head portion configured on one side of the support,
The head portion includes a fixture, extension portion, fixed body, tip case,
Fixture is a structure through the inside,
The extension part is a cylindrical structure through which the inside is penetrated, and the structure is divided into a plurality of parts along the circumferential direction, and the internal space of the extension part is formed into a space that increases from one end to the other end, and the outer surface of the extension part is along the circumferential direction. Forming a plurality of fixed wedges of the protruding structure, a plurality of circular springs of a circular structure is installed on the outer periphery,
The fixed body has a cylindrical shape penetrating the inside, the outer periphery forms an outer taper that extends from one side to the other side,
The tip case is composed of a structure in which a plurality of stoppers protruding into an inner space and one end is open and protruded into an inner space are formed.
The fastener is fixed to one side of the support, and the expansion part, the fixed body, and the tip case are sequentially assembled to the fastener,
When the extension is fitted to the stationary body, a narrow portion of the outer taper of the stationary body is inserted into a wider portion of the inner cross section of the enlarged body, and finally a portion of the wider inner cross section of the enlargement portion is extended to the wider portion of the outer taper of the stationary body. Assembled in position,
The tip case is fixed to the fixed body, the nail is composed of a structure assembled so that the end of the support portion is located in a position that does not pass through the stopper of the tip case,
Used for normal nail construction, nails with excellent fixing ability, characterized in that the nail is installed by the expansion of the expansion part due to the blow.
The method of claim 1,
The tip case is hollow inside and has an open structure, and on the open outer periphery, a male screw is formed.
A female screw is formed on the inner circumference of the fixed body, the front end case and the fixed body are assembled by screwing, and the inner inner circumference formed with the female thread of the fixed body forms an inner taper so as to have a space gradually narrowed toward the opposite side of the female screw. The wedge is assembled to the inner taper of the fixed body,
The wedge has an inner circumferentially penetrated inner cylinder, and is configured to have a structure divided into a plurality along the circumferential direction, and the penetrating inner circumference forms a protrusion, and the cross section of the wedge is formed from one end to the other end. Formed to have a gradually widening thickness, such that the thicker portion of the wedge is assembled so that the female body of the fixing body is located toward the side where the female thread is formed,
When the support portion of the installed nail is tensioned, the nail having excellent fixability, characterized in that the fixing portion is increased by further expanding the relatively expanded portion by the movement of the support portion and the fixed body by the wedge holding the support portion.
The method of claim 2,
The inclination of the inner space of the extension part is formed to be the same as the inclination of the outer taper of the fixing body, and the cross section of the fixing wedge of the extension part has a triangular shape, which becomes narrower as the inner space of the extension becomes wider and becomes wider toward the other surface thereof. Form into a structure,
The head portion is provided with a support screw is provided with a male screw, the inner peripheral edge of the fastener is formed with a female screw, the side of the fastener is characterized in that it is configured to reach the space through the bolt nail excellent in fixing ability.
The method of claim 3, wherein
Coupler is provided with a female thread on both sides,
The support portion is divided into a tip support portion provided with a head portion and an elongated support portion except for the tip support portion, male threads are formed on the tip support portion and the long support portion, and the long support portion and the tip support portion are connected to each other by a coupler,
The long support of the support is covered by a protector that encloses this long support,
Nail removal after the construction of the nail. A nail with excellent fixing ability, which is easy to remove the nail by disassembling the male screw of the long support part from the coupler during recovery.
5. The method of claim 4,
The protection part comprises a tubular protection part and a female thread protection part, the tubular protection part covers the support part from the end of the coupler, the female thread formed on the inner circumference of the female thread protection part connected to the tubular protection part, the female thread protection part covers the support part formed with a male thread ,
The tubular protector has a length of 4 to 5 times longer than the female screw protector, and the tubular protector covers the female screw protector and is sealed by sealing.
Tubular protector and coupler is configured to be sealed by a tubular sealing cover,
When a tensile force is applied to the support of the nail, the tensile force is transmitted only to the support of the tubular protection portion, the nail excellent in fixing force, characterized in that to minimize the penetration failure.
Claims 1 to 5 are provided with a nail excellent in fixing power, a common acupressure plate and a spacer,
A slope cleaning step S0 of arranging slopes for constructing a nail;
Drilling step (S1) to form a punching hole by drilling a place for the nail construction;
In order to maintain the gap between the support and the drilling hole, a nail provided with a spacer installed along the length of the support and two hoses provided in the longitudinal direction of the support for injection of grout material is inserted into the drilling hole, and the support protruding from the ground Punched nail insertion and striking step (S2) to blow and expand the spread portion;
An acupressure plate installation step (S3) of inserting a pressure plate into a support part protruding from the ground, and inserting a nut into the support part;
The grouting material is injected through the grouting material injection hose, and the nailing construction is completed by the grouting and curing step (S5) of grouting and filling the boring hole,
Nailing construction method using a nail having excellent fixing ability, characterized in that to increase the fixing force of the tip by hitting the support and expansion of the extension.
The method according to claim 6,
After the pressure plate installation step (S3), the tension force tension step (S4) for further tightening the nut installed on the pressure plate to tension the support portion is added,
Nailing construction method using a nail having excellent fixing ability characterized by increasing the stability of the construction paper by the extension of the extension of the extension and the support portion.
Claims 1 to 5 are provided with a nail excellent in fixing power, a common acupressure plate and a spacer,
Digging and surface picking (G0) to dig the ground;
A shockcrete step G1 for performing the construction surface shockcrete;
Drilling step (G2) to form a drilling hole by drilling a place to install a nail;
Insert the nail with the spacer installed along the length of the support to maintain the gap between the support and the drill hole, and the two hoses provided in the length direction of the support for injection of grout material into the drill hole and hit the support projected from the ground. Nail insertion and striking step G3 to enlarge the bulge;
Acupressure plate installation step (G4) of fitting the pressure plate to the support portion protruding from the ground and fitting the nut to the support portion;
The grouting material is injected through the grouting material injection hose, and the nailing construction is completed in the grouting and curing step (G6) of grouting and filling the boring hole,
Nailing construction method using a nail having excellent fixing ability characterized by increasing the stability of the construction paper by the extension of the extension of the extension and the support portion.
The method of claim 8,
After the pressure plate installation step G4, a tensioning step G5 for further tightening the nut installed on the pressure plate to tension the support part is added.
Nailing construction method using a nail having excellent fixing ability characterized by increasing the stability of the construction paper by the extension of the extension of the extension and the support portion.
The method of claim 9,
The lower pressure plate of the plate through the center and the pressure plate attached sheath of the structure of the tubular sheath is integrally provided on the upper portion of the hole of the lower pressure plate, the angle of the sheath relative to the lower pressure plate is the perforated hole in the ground It is provided to be formed equal to the slope formed with respect to,
The shockcrete step G1,
Primary shock concrete step (F1) for spraying the shot concrete to the construction surface as a whole;
Reinforcing mesh installation process (F2) to install a reinforcing mesh in the previously hardened shockcrete;
Acupressure plate attachment type sheath installation process (F3) which installs acupressure plate attachment type sheath in the position to install a nail;
Reinforcing bar installation process (F4) for installing the reinforcing bar to the reinforcing mesh to pass through the lower pressure plate of the pressure plate mounting type sheath installed above;
It is configured to include the process of the secondary shockcrete process (F5) for spraying the second shotcrete to the reinforcing mesh and reinforcing bars previously installed,
Nailing construction method, characterized in that in the tension process of the support, the bearing force is dispersed by the pressure plate attached sheath to minimize the penetration failure.

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