KR101244992B1 - The ground anchor and the anchor construct method therewith - Google Patents

Abstract

PURPOSE: A ground anchor and an anchor construction method thereof are provided to increase the holding power and to effectively have an easy installation and construction of a ground anchor. CONSTITUTION: A ground anchor includes a head unit, a support unit and a protection tube(500). The head unit comprises a head case(200), an expansion part(300) and a pusher part(400). The support unit is composed with a length applied to a normal ground anchor and fixed inside the head case. The protection tube is assembled to the inner circumference of the pusher part by a tight fit and composed with an end having a length enough to cover the support unit.

Description

Ground anchor and the anchor construct method therewith}

The present invention relates to a ground anchor and an anchor construction method using the ground anchor, wherein the head portion constitutes a ground anchor composed of a plurality of support portions having a normal ground anchor length and a head portion formed on one side of the support portion. The head case is composed of a head case, a fixing part, an extension part, and a pusher part, but the head case is hollow inside, one end is blocked, and the other end is open, and the slip part of the open part is larger in cross section than the slip part to form a slope. The inclined portion, the cylindrical portion having a larger cross section than the slip portion is formed integrally one by one, the inside of the head case is a fixed portion formed with a plurality of through holes are located, the expansion portion is a cylindrical shape penetrated inside In addition, the structure is divided into a plurality in the circumferential direction, the fixing wedge of the structure protruding in the circumferential direction on the outer surface of the extension portion A plurality of elastic rings are assembled on the outer periphery of the extension part, and the pusher part consists of a tubular support tube and a pusher having a diameter larger than the tubular shape, and a separate protective tube is further configured, and each support part has a head. Through the hole of the fixing part inside the case, it is fixed by the fastener, and the slip part of the head case is assembled with the expansion part and the pusher part in turn, and the protective tube surrounding the protruding support part is pressed at the end of the support tube of the pusher part, the corrugated pipe, Install the ground anchors with spacers and hoses in the drilled holes, and when the force in the direction of the head case acts on the protection tube, the pusher part pushes the extension part and the extension part moves along the inclined part. After grouting and curing through the hose, the ground anchor is completed through the tension of the support, This is an excellent, easy to install and construction of the ground anchor.

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.

The ground anchoring method is to bury the ground anchor according to the construction site, or to remove the ground anchors installed, for example, the ground anchor developed for the removal combined, Korean Patent Registration No. 0443038, a separate auxiliary It is published about the 'removable earth anchor' of the structure that releases the fastening of the steel wire by using a plurality of towing wires inserted into the pipe, and also in the Korean Patent Registration No. 0944244, the wedge portion is connected to the structure sequentially 'Space Ground Pressing Device Using Spring and Wedge Principle and Method of Removing Tension Material Connected' is published.

However, in the case of the removable earth anchor of the first illustrated patent, since the towing wire is integrated with the ground anchor, interference may occur during the installation and grouting of the earth anchor, and may act as an obstacle to construction. In addition, in the case of the space pressing device of the second exemplified patent, although the removal method is simple, it is composed of a structure in which too many members are assembled, thereby increasing the manufacturing cost.

In addition, in the case of the removable earth anchor of the first exemplified patent, since the end portion (head portion) that is embedded in the perforated interior forms a simple wedge structure, there is a fear of falling into the externally applied tensile force, In addition, in the case of the space pressing device of the second exemplary patent, the wedge portion is prepared for the tensile force, but the enlarged wedge portion is composed of a plurality of clutch bits divided along a plurality of circumferential directions, and the clutch bit is circular Since it has a structure that is elastically connected by the connecting spring of, the connection spring may be pulled out by the tensile force if the clutch bit does not hold enough.

In addition, in the conventional general anchor construction method, since the tension of the ground anchor is made after curing of the grouting in the perforation, there is a concern that the grout material may be cracked and the strength decreases around the reinforcing bars.

Therefore, in order to solve the above problems, the head portion, while forming a ground anchor consisting of a plurality of support portion having a normal ground anchor length, the head portion configured on one side of the support portion, the head portion, the fixing portion, expansion Consists of an opening portion and a pusher portion, the head case is hollow inside, one end is clogged, the other end is open structure, the slip portion of the open portion, the inclined portion to form a slope more gradually than the slip portion, the slope portion than the slip portion Cylindrical components having a large cross section are formed integrally one by one, and a fixing part formed with a plurality of through holes is located inside the component part of the headcase, and the extension part has a cylindrical shape through which the inside is penetrated, and is arranged in a circumferential direction. It is a structure divided into pieces, and the outer surface of the extension part integrally forms a fixed wedge of the structure protruding along the circumferential direction, and the outer peripheral edge of the extension part There is a plurality of elastic rings are assembled, the pusher portion is composed of a tubular support tube and a pusher of a larger diameter than the tubular, and a separate protective tube is further configured, each support portion passes through the hole of the fixing portion inside the headcase It is fixed by the fastener, and the expansion part and the pusher part are assembled in the slip part of the head case in sequence, and the protective tube surrounding the protruding support part is fitted at the end of the support tube of the pusher part, so that the ground anchor with the corrugated pipe, the spacer and the hose is installed. It is installed in the drilling hole, and when the force in the direction of the head case acts on the protection tube, the pusher part pushes the extension part and expands and expands it along the inclined part.The pressure plate is installed as a fixture, grouted and cured through a hose The construction of the ground anchor is completed through the tension of the support, so that the fixing force is increased, and the ground anchor is installed. Make it easy to install and install.

The head case further includes a resin part made of a resin material in which a main body forming a plurality of through holes and a temporary plate covering one surface of the main body are integrally formed, and a wedge is used as a fixture for fixing the support part. When the end of the support projecting from the fixture is inserted into each through hole of the resin part and hits the support part of the end of the protective tube, the support part passes through the resin part while breaking the temporary plate, and the wedge is divided while the wedge hits the main body. Since it falls, it is easy to remove the support from the anchor installed in the hole.

And further provided with a tube structure to form a ring-shaped space to a predetermined length, and installed so that the auxiliary tube is positioned at the end of the corrugated pipe of the ground anchor to be installed in the drilling hole, connecting the hose into the installed auxiliary tube When grouting the hole, grout the inside of the hole first, and then supply the grouting material through the inside of the auxiliary tube so that the expanded auxiliary tube is in close contact with the anchor and the hole, and then drills the head side of the ground anchor. The grouting of the hole further increases the density of grouting of the head portion, so as to have an excellent fixing force.

As described above, the present invention comprises a head part including a head case, a fixing part, an extension part, and a pusher part, and a plurality of support parts having a normal ground anchor length are fixed inside the head case, and the protruding support part supports the pusher part. At the end of the tube, a protective tube surrounding the protruding support portion constitutes an interference clamped ground anchor, and the ground anchor is used for anchor construction, thereby providing excellent anchoring force and facilitating installation and construction of the ground anchor.

The head case further includes a resin part made of a resin material in which a main body forming a plurality of through holes and a temporary plate covering one surface of the main body are integrally formed, and a wedge is used as a fixture for fixing the support part. When the end of the support projecting from the fixture is inserted into each through hole of the resin part and hits the support part of the end of the protective tube, the support part passes through the resin part while breaking the temporary plate, and the wedge is divided while the wedge hits the main body. Since falling off, there is an effect that the support portion can be easily removed from the anchor installed in the drilling hole.

And further provided with a tube structure to form a ring-shaped space to a predetermined length, and installed so that the auxiliary tube is positioned at the end of the corrugated pipe of the ground anchor to be installed in the drilling hole, connecting the hose into the installed auxiliary tube When grouting the hole, grout the inside of the hole first, and then supply the grouting material through the inside of the auxiliary tube so that the expanded auxiliary tube is in close contact with the anchor and the hole, and then drills the head side of the ground anchor. By further grouting the holes, the density of grouting of the head portion is increased, so that fixing force is excellent.

1 is a perspective view of the head portion of the ground anchor according to the present invention.
Figure 2 is a perspective view showing a state in which the expansion portion of the ground anchor according to the present invention is expanded.
3 is a cross-sectional view and a partially enlarged view of a head portion of the ground anchor according to the present invention.
4 is a cross-sectional view showing a permanent ground anchor according to the present invention.
5 (a) and (b) is a cross-sectional view showing a process of expanding the expansion of the ground anchor according to the present invention.
Figure 6 (D) and (D) is a cross-sectional view showing a process of removing the support of the ground anchor according to the present invention.
7 is an enlarged view of a portion A of FIG. 6.
8 is a perspective view showing a ground anchor is installed corrugated tube according to the present invention.
9 is a cross-sectional view showing a ground anchor seated in the drilling hole in accordance with the present invention.
10 is a cross-sectional view showing the ground anchor is completed anchor construction according to the invention.
Figure 11 is a cross-sectional view showing a state in which the first ground grout is installed when the auxiliary anchor is installed in accordance with the present invention.
Figure 12 is a cross-sectional view showing a ground anchor with an auxiliary tube installed and the support is removed in accordance with the present invention.
FIG. 13 is an enlarged cross-sectional view illustrating an enlarged portion of the auxiliary tube of FIG. 12. FIG.
14 is a flow chart according to the construction method using a ground anchor according to the present invention.

The present invention relates to a ground anchor and an anchor construction method using the ground anchor, wherein the head portion constitutes a ground anchor composed of a plurality of support portions having a normal ground anchor length and a head portion formed on one side of the support portion. The head case is composed of a head case, a fixing part, an extension part, and a pusher part, but the head case is hollow inside, one end is blocked, and the other end is open, and the slip part of the open part is larger in cross section than the slip part to form a slope. The inclined portion, the cylindrical portion having a larger cross section than the slip portion is formed integrally one by one, the inside of the head case is a fixed portion formed with a plurality of through holes are located, the expansion portion is a cylindrical shape penetrated inside In addition, the structure is divided into a plurality in the circumferential direction, the fixing wedge of the structure protruding in the circumferential direction on the outer surface of the extension portion A plurality of elastic rings are assembled on the outer periphery of the extension part, and the pusher part consists of a tubular support tube and a pusher having a diameter larger than the tubular shape, and a separate protective tube is further configured, and each support part has a head. Through the hole of the fixing part inside the case, it is fixed by the fastener, and the slip part of the head case is assembled with the expansion part and the pusher part in turn. Install the ground anchors with spacers and hoses in the drilled holes, and when the force in the direction of the head case acts on the protection tube, the pusher part pushes the extension part and the extension part moves along the inclined part. After grouting and curing through the hose, the ground anchor is completed through the tension of the support, This is an excellent, easy to install and construction of the ground anchor.

Ground anchor according to the present invention is composed of a support portion 100 and the head portion and the protective tube 500, first, referring to Figure 3 with reference to the support portion 100, the support portion 100 is a wire, steel bar or rebar, or , Screw rebar, etc., the length of which is applied to the general ground anchors.

Next, the head part includes a head case 200, an extension part 300, and a pusher part 400, but the head case 200 has an inner side, and one side is opened, and a cone part 211 and a component part 212 are included. 221, the inclined portion 222 and the slip portion 223 is formed integrally, as shown in Figure 3, the head case 200 is the front portion 210 and the rear portion 220 for assembly Separately configured, the front portion 210 is a cone portion 211 to form a cross-sectional diameter that increases from one side toward the other side, and the component portion 212 formed in a cylindrical shape at one end of the wide side of the cone portion 211 is Consisting of one part, the front part 210 is a concave structure of the narrowest diameter of the cone part 211, the other side of the component portion 212 has an open structure, the rear portion 220 is open cylindrical at both ends The inclined portion 222 of the shape portion 221, the inclined portion 222 that gradually becomes smaller in cross-sectional diameter than the configuration portion 221 to form an inclination, the continuous in this inclined portion 222 It is composed of a slip portion 223 connected and smaller in diameter than the component portion 221, the front portion 210 and the rear portion 220 of the end portion of the component portion 212 and the component portion 221 of the rear portion 220 The end portion is screwed to form a head case 200 of an integrated structure.

Meanwhile, the head case 200 includes a fixing part 230, a resin part 240, and a fastener. As shown in FIG. 3, the fixing part 230 includes a plurality of through holes 231. In the structure, the hole is formed to have a diameter widening from one end to the other end, and the hole 231 is formed by the number of supports 100 that constitute the ground anchor.

In addition, the resin part 240 is composed of a cylindrical body 241 and a temporary plate 243, the body 241 is formed a plurality of through holes 242, the through hole 242 is a support portion It is about the size of the fitting 100, and the arrangement has the same position as the hole 231 of the fixing part 230, the temporary plate 243 is the one side of the through hole 242 of the main body 241 The temporary plate 243 is temporarily fixed to the main body 241 and has a structure that is separated or broken by external force, and the temporary plate 243 is the same as the main body 241. It has a small diameter, the diameter of the body 241 is composed of a diameter to be assembled to the component portion 212 of the front portion 210 of the head case 200, the resin portion 240 is preferably composed of a synthetic resin material. .

And the fixture is to fix the support portion 100 in the head case 200, it may use the wedge 250 or the grip 260, first to describe the wedge 250 and the grip 260 to be described separately The wedge 250 has a cylindrical shape through which the inside is formed, and a protrusion (or a female screw) is formed at the inner circumferential edge thereof, and the cross section forms a thickness widening from one end to the other end, and the wedge 250 is formed. The structure is divided into a plurality of structures along the circumferential direction, as shown in Figure 4 and 7, Wedge 250 of the wide cross-sectional side is formed with a groove 251 in the circumferential direction, this groove 251 The O-ring may be assembled to maintain the shape of the wedge 250.

The resin part 240, the fixing part 230, and the wedge 250 are configured in such a manner to fix the ends of the support part 100 in the head case 200, but the head case 200 has the front part 210. In the structure separated into the rear part 220), the end of the support part 100 is inserted into the slip part 223 side of the rear part 220, protrudes from the component part 221, and protrudes into the component part 221. The support part 100 is assembled to be fitted into the hole 231 of the fixing part 230, but in a state in which the space side of the wide cross section of the hole 231 is directed outward, the wedge 250 in each support part 100. ) Is assembled into the O-ring (to temporarily assemble the wedge and not shown in the drawing), and then pull the support part 100 protruding on the opposite side (sleeve side) with a strong force, so that the wedge 250 is fixed part 230. After the O-ring is removed from the groove 251 of the protruding wedge 250, the end of the support part 100 protruding from the wedge 250 passes through the resin part 240. Inserted and fixed to (242), the front portion 210 is assembled to the rear portion 220 to complete the head case 200 assembly.

Next, the expansion unit 300 and the pusher 420 will be described. As shown in FIGS. 1 to 3, the expansion unit 300 has a cylindrical shape penetrating therein and is divided into a plurality of parts along the circumferential direction. As shown in FIG. 5, the cross section penetrated into the extension part 300 is formed into a space that is widened from one end to the other end, and the inclination of the interior of the extension part 300 is previously determined by the head case ( It is formed to be similar to the inclination of the inclined portion 222 of the rear portion 220 included in the 200, the outer surface of the extension portion 300 is a fixed wedge 310 of the structure protruding along the circumferential direction in the longitudinal direction According to Figure 2, as shown in Figure 2, the cross section of one fixing wedge 310 is in the shape of a triangle, the narrower toward the wider side of the internal space of the expansion portion 300, the more toward the other side It is widened and formed in the cross section of a triangle, respectively, and the extension part 300 is the back part 220 slab. But the assembly unit 223 side, and move to the side of the inclined surface is the cross-sectional widening of a cylindrical shape to prevent pullout of the ground anchor bakhyeoseo around the fixed wedge (310).

In addition, a plurality of elastic rings 320 are assembled and maintained on the outer circumference of the plurality of extension parts 300, the elastic ring 320 uses an O-ring or a circular spring, and the O-ring is an elastic ring And, the circular spring is a spring having a circular structure, the extension 300 is divided into the slip portion 223 of the head case 200 is assembled, the relatively thin cross-section of the inclined portion 222 side After assembling the extension 300 to have a circular cross-section facing, a plurality of elastic rings 320 are assembled on the outer periphery of the extension 300 to maintain the shape of the extension 300.

Subsequently, the pusher part 400 is formed in a tubular shape, and is fitted to the outer periphery of the slip part 223 of the rear part 220 included in the head case 200, as shown in FIGS. 1 and 3. The unit 400 includes a support tube 410 and a pusher 420 having a larger diameter than the tubular shape, and the pusher 420 has a sliding hole penetrated therein with a larger diameter than the inside of the support tube 410. 421 is formed, the sliding hole 421 is formed to be larger than the outer diameter of the slip portion 223 of the head case 200, or similar to the inclined portion 222 of the head case 200.

On the other hand, the pusher 420 is assembled to the extension part 300 side, the pusher part 400 moves along the slip part 223 to the inclined part 222 side, in order not to push the other side, the pusher part 400 ) Is formed on the inner periphery of the key 422, the outer peripheral edge of the slip portion 223 of the head case 200 forms a key groove 224, the key 422 is narrow along the direction of the pusher 420 When the key groove 224 forms a cross section narrowing along the direction of the inclined portion 222, the pusher 400 moves in the direction of the inclined portion 222 of the head case 200, but In the opposite direction, movement by the key 422 is prevented, and the key 422 is formed in the pusher unit 400 and the key groove 224 is formed in the head case 200. ) May be formed in the key groove, and a key may be formed in the head case 200.

And the protective tube 500 is composed of a rigid pipe, as shown in Figure 3, the protective tube 500 is assembled so as to be fitted to the inner periphery of the end of the pusher 400, the end of the support portion 100 It has a length enough to cover, the cap 510 is assembled while blocking the end of the protective tube 500, the cap 510 is to prevent the shaking of the support part 100 of the inside of the protective tube 500, disassembly and It is configured to facilitate assembly.

Thus, as shown in Figure 3, the support portion 100 is assembled into the head case 200 to be fixed by the wedge 250, the expansion portion 300, the pusher portion 400 to the head case 200 ) And the protective tube 500 are sequentially assembled, and constitutes a ground anchor with a structure in which a cap 510 is assembled at the end of the protective tube 500.

Before explaining the construction method using the ground anchor configured in this way, the structure of the expansion of the extension 300 and the separation structure of the support 100 will be described. First, as shown in FIGS. 1, 2, and 5. In the state where the extension part 300 is in the slip part 223 and the cap 510 is separated, only the protection tube 500 is pushed, and the pusher 420 which is forcibly fitted to the protection tube 500 is the extension part 300. The extension 300 pushes the slip 223 and the pusher 420 moves along the slip 223 and the inclined portion 222, as shown in (b) of FIG. ) Has a cylindrical structure (expanded structure) with a larger diameter.

In addition, as shown in (c) of FIG. 6, when the extension portion 300 hits the end of the protruding support portion 100 in the expanded state, as shown in (d) of FIG. 6, the support portion inside the head case 200. 100 is also moved to the front portion 210, the wedge 250 by the striking force is pulled out of the hole 231 of the fixing portion 230, the temporary plate 243 of the resin portion 240 is broken or fall The support part 100 exits to the blocked part of the cone part 211 of the front part 210, and the wedge 250 separated from the fixing part 230 is divided or dropped, or the wedge 250 is separated from the main body 241. The wedge 250 is divided and dropped by the impact of the impact), and at this time, the wedge 250 does not hold the support part 100, and thus pulls out the protruding support part 100.

On the other hand, the ground anchor described above is a removable ground anchor structure for removing the support portion 100, in the permanent ground anchor structure does not remove the support portion 100 has a simpler structure than the removable ground anchor structure Looking at the permanent anchor structure with reference to Figure 4, the permanent anchor head case 200, support portion 100, fixing portion 230, extension portion 300, pusher portion 400, protective tube 500 , The cap 510, the assembly structure is substantially the same as the anchor structure described above, the support portion 100 inside the head case 200 is fitted in the hole 231 of the fixing portion 230, the head case The fixture for fixing the support part 100 at the side of the tip part 210 of the 200 is composed of a wedge 250 or a grip 260 (a hem structure, which is inserted into the support part 100 to be gripped by a gripper or tongs, etc. 100), and has a structure fixed by the grip 260 In the case of using the cross section of the hole 231 of the fixing portion 230 may be formed without the inclination, since the permanent anchor is not the resin portion 240, the front portion 210 and the rear portion of the head case 200 The total length of each of the components 212 and 221 of the 220 is shorter, and the pusher 420 of the pusher 400 pushes the extension part 300 to push the protective tube 500 to expand. .

Before explaining the construction method using the ground anchor configured in this way, the pressure plate 630, fixture 640, spacer 610, corrugated pipe 600, auxiliary tube 650, hose 621 (622) required for construction ) 623 is as follows.

First, the acupressure plate 630 is a plate structure with a through hole formed therein, and as shown in FIG. 11 or 12, the acupressure plate 630 having a hole penetrated through a plate having a flat structure as in the conventional acupressure plate 630. In addition to the pressure plate 630 having the structure of the conventional pressure plate 630, various pressure plate 630 may be applied according to the characteristics of the construction site, in addition to the pressure plate 630, after the grouting construction in the anchor construction process, in the tensioning step In order to prevent penetration failure, as shown in FIG. 10, a pressure plate 631 is installed before the pressure plate 630 is installed. The pressure plate 631 also has a hole penetrated at the center thereof, and is a representative hydraulic plate 631. Has cross-shaped precast concrete blocks.

Next, as shown in Figure 11, the fastener 640 is composed of a wedge or grip, etc., the wedge is a cylindrically penetrated structure, the inner periphery of the penetrating to form a projection (or a female screw), The cross section has a thickness that increases from one end to the other end, and the wedge is composed of a plurality of divided structures along the circumferential direction, and the wedge of the wide cross section is formed with a groove in the circumferential direction, and the O-ring is assembled in the groove. It can be fixed to the support portion 100, while maintaining the shape of the wedge, the grip is composed of a karaoke structure, and can be fixed to the support portion 100 by being pinched by the gripper, tongs, etc. inserted into the support portion 100.

As shown in FIG. 13, the spacer 610 maintains a gap between the support part 100 of the ground anchor inserted into the drilling hole 700 and the drilled drilling hole 700. Since there is a spacer 610, a detailed description thereof will be omitted.

In addition, as shown in Figure 8, the corrugated pipe 600 is a tube having a corrugation formed on the outer periphery, has an inner diameter fitted to the outer diameter of the support tube 410 of the pusher 400, The length consists of the length of 1/5-1/3 of the length of the support part 100.

And, as shown in Figure 11, the auxiliary tube 650 is a tube structure to form a ring-shaped space of a predetermined length, optionally added as needed, the auxiliary tube 650 is not waterproof or non-woven fabrics, such as When the grout material is supplied to the auxiliary tube 650, moisture (water) is discharged to the outside, and only the cement is filled so that the auxiliary tube 650 is closed, and the hoses 621, 622, 623 are It is a tube (or tube, pipe) that can inject the grout material 710 into the drilled hole in the anchor construction.

Meanwhile, prior to the construction of the anchor, a spacer 610, a corrugated pipe 600, and hoses 621, 622, and 623 are pre-installed on the ground anchor, and the corrugated pipe 600 is mounted on the pusher 400 of the anchor. Install in order, and install a plurality of spacers 610 along the protective pipe 500 of the ground anchor, the spacer 610 is also installed in the corrugated pipe 600 as necessary, as shown in Figure 9 or 11 To install two or more hoses 621, 622, and 623, as shown in FIG. 9, one hose 621 starts near the pusher 420 of the pusher 400, and thus, the protective pipe 500. It is installed long and the other hose 622 is installed near the end of the protective tube 500 (end of the protective tube on the opposite side of the head case), and when drilled downward for the ground anchor, grouting with the deeply installed hose 621, the other Perforated hole 700 to allow the grouting material to flow out through the hose 622 (overflow) After the inside is completely filled, after a lapse of time, if the grout material is removed from the punching hole 700 due to the discharge of foreign matter, absorption, etc., secondary grouting is performed to completely fill the punching hole 700.

Meanwhile, an auxiliary tube 650 is further installed at the end of the corrugated pipe 600 at the end of the corrugated pipe 600 (the end of the corrugated pipe on the opposite side of the head case). When the auxiliary tube 650 is installed, as shown in FIG. 11, one hose 621 is provided. Starting near the pusher 420 of the pusher unit 400 is installed longer than the protective tube 500, the other hose 623 is installed to be drawn into the auxiliary tube 650, the deeply installed hose 621 By grouting, the grouting material flows into the perforated hole 700 (overflow), completely filling the inside of the perforated hole 700, and secondly supplying the grouting material into the auxiliary tube 650. Auxiliary tube (650) is tightly contacted with the protective tube 500 and the drilling hole 700 to be watertight, and then grouted again through the hose 621 is installed in the third deeper around the head case 200 and the corrugated pipe 600 side Ensure complete grouting with high density.

The construction method of the ground anchor using the acupressure plate 630, the fastener 640, and the spacer 610 described above will be described, but the ground anchor can be applied to a general slope or soil barrier, and the construction method of the anchor is shown in FIG. In detail according to the following as follows.

First, the construction site arranging step (S0) is a step of arranging the construction site to be constructed, that is, the construction site in the usual way, in the case of the slope to make the construction surface uniform according to the state of the slope, and in the case of earthen construction thickening Good and then install the mudguard wall 632, such as mudwall and braces, props, and strips necessary for the mudguard.

On the other hand, prior to the next drilling step (S1), according to the number and spacing of the ground anchors, the marking (marking) the position where the ground anchors are installed in advance, the installation of the drilling and ground anchors further It is easy.

Next, the drilling step (S1) is a step of constructing the drilling hole 700 by drilling a place previously marked in the place where the ground anchor is to be installed to the ground anchor construction depth, the drilling is according to the state of the construction site, with respect to the slope It is preferable to drill in a vertical direction or to have an appropriate angle, and the diameter of the punching hole 700 is equal to or slightly larger than the diameter of the head case 200 of the ground anchor.

In addition, the ground anchor seating step (S2), as shown in Figure 9, by inserting the ground anchor in the previously formed boring hole 700, the ground anchor is seated in the boring hole 700, corrugated pipe ( The ground anchors 600 and the spacers 610 and the hoses 621 and 622 are installed so that the head case 200 faces the boring hole 700. If necessary, the ground anchors are installed in the auxiliary tube 650. The ground anchor is inserted into the drilling hole 700 in the state of additionally installing the ground anchor, and the ground anchor is easily inserted into the drilling hole 700 by the cone part 211 during the insertion process, and the protective pipe 500 and the cap Since the shaking and the bending due to the length of the support part 100 are minimized by the 510, the installation is easy, and the ground anchor inserted into the boring hole 700 is seated in the boring hole 700 so that a part of the protective tube 500 and the cap are formed. 510 has an exposed state.

Next, in the ground anchor fixing step (S3), the cap 510 of the ground anchor protruding from the drilling hole 700 is removed, and the protective part 500 is pressed (or hitted) to expand the extension part 300. In the step of, by pressing or hitting only the protective tube 500, the cap 510 is removed in the direction of the head case 200 to expand the expansion unit 300 to secure the expansion unit 300 by puncturing the expansion unit 300 The wedge 310 has a structure in which the ground anchor is fixed to the drilling hole 700 by the extension part 300 while being nailed to the side of the drilling hole 700.

And acupressure plate installation step (S4) is inserted into the pressure plate 630 at the end of the protruding protective tube 500, seating the pressure plate 630 on the ground, and fixing the fixture 640 to the end of the support portion 100, protective tube 500 ) Protrudes more than the ground and interferes with the installation of the pressure plate 630, and removes a part of the pressure plate 630. After installing the pressure plate 630 and the fixture 640, the hoses 621 and 622 of the ground anchor are installed. ) Has a structure protruding to the outside, when the ground anchor is installed on the slope, as shown in Figure 10, the hydraulic plate 631 (() is further installed before the pressure plate 630 is installed. .

On the other hand, when the ground anchor is applied to the construction of the earth, in the pressure plate installation step (S4), after the installation of the pressure plate 630, tensioning the support portion 100 can further increase the stability of the construction site.

Next, the grouting and curing step (S5) is a step of grouting the hole (700) with a grout material 710, as shown in Figure 11, as shown in Figure 11, through the hose 621, grout material (such as mortar) 710 is injected to completely fill and cure the drilling hole 700, and the injected grout material 710 is cured at an appropriate time. The grouting is installed in a depth close to the pusher 420, as in a general method. Grouting to 621, completely filling the inside of the drilling hole 700 to allow the grouting material to flow out to another hose 622, and then, after a lapse of time, If the grout material 710 is largely out of the hole 700 for a reason, the second grouting completely fills the hole 700 and cures.

On the other hand, when the auxiliary tube 650 is installed in the ground anchor, as shown in Figure 11, grouting with a hose 621 deeply installed close to the pusher 420, completely filling the inside of the drilling hole 700, The grouting material is injected into the hose 623 connected to the auxiliary tube 650 so that the auxiliary tube 650 is brought into close contact with the ground anchor and the drilling hole 700 by the expansion of the auxiliary tube 650, and is closer to the pusher 420. The grouting material 710 is more densely filled in the boring hole 700 at the lower side of the corrugated pipe 600 by grouting with a deeply installed hose 621 to completely fill the boring hole 700. 710).

Next, the tension step (S6) is a step of pulling the support portion 100 protruding over the pressure plate 630 to tension the support portion 100, in this way to pull the support portion 100 appropriately according to the construction site in this way, At this time, the outer side of the close contact portion, in detail, because the fixed fixing wedge 310 of the expansion portion 300 is embedded in the sidewall of the drilling hole 700, there is a characteristic that is stable to high tensile force.

Permanent anchor construction is completed by the tension step (S6), it is preferable to remove the support portion 100 of the ground anchor when removing the retaining block in the earthwork construction applied ground anchor, in such a removable type anchor construction, Next, the support removing step (S7) is added, this step is to remove the support 100, in order to remove the support 100, after removing the fastener 640 and the support 100, the support 100 When hitting the end of the wedge, the wedge 250 inside the head case 200 is separated from the hole 231 and the wedge 250 is separated while hitting the resin portion 240 is separated, as shown in Figure 12, the support portion 100 can be easily removed.

As in the above-described anchor construction applied to the slope and the earthenware described above, the ground anchor according to the present invention is easy to install into the drilling hole 700 by the insertion and expansion of the expansion portion 300, and the tensile force according to the state of the construction site It is also easy to add, it is easy to remove after the construction after the earthquake.

 In addition, even if the construction paper (slope or earthen construction paper) to which the ground anchor construction is applied is behaving, the tensile force is distributed to the support part 100 included in the corrugated pipe 600 as well as the pressure plate 630, thereby expanding the stress. It is characterized by a high reinforcement function and stability of the construction site due to the tension of the ground anchor by the range.

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

100: support 200: head case
210: line portion 211: cone portion
212 component 220: rear
221: component 222: inclined portion
223: slip section 224: keyway
230: fixing part 240: resin part
241: main body 242: through hole
243: Temporary Edition 250: Wedges
260: grip 300: expansion
310: fixed wedge 320: elastic ring
400: pusher 410: support tube
420: pusher 421: key
500: protective tube 510: cap
600: corrugated pipe 610: spacer
621, 622, 623: hose 630: pressure plate
631: hydraulic plate 632: fender
640: fixture 700: drill hole
710 grout

Claims (8)

delete In the ground anchor composed of a plurality of supports having a normal ground anchor length, the head portion configured on one side of the support,
The head portion, including a head case, a fixed portion, expansion, pusher,
The head case has a hollow structure, one end is clogged, and the other end is open, and the slip part of the open part, an inclined part that becomes larger in cross section than the slip part to form a slope, and a cylindrical component having a larger cross section than the slip part. Consist of all in one order,
The fasteners are located in the head portion by forming a plurality of perforated holes,
The expansion part is divided into a plurality of structures along the circumference direction,
As the cylindrical shape penetrated inside, the inner cross section is formed into a space that is widened from one end to the other end, so that when the extension is expanded, the exterior is formed into a cylindrical shape,
The outer surface of the extension part integrally formed with a fixed wedge of the structure protruding along the circumferential direction, a plurality of elastic rings are assembled on the outer periphery of the extension,
The pusher part consists of a tubular support tube fitted to the outer periphery of the slip part of the headcase, and the pusher part facing the enlarged part integrally comprises a pusher having a larger diameter than the tubular support tube, and the inner part of the pusher. A sliding hole penetrated with a diameter larger than the inside of the supporting pipe is formed,
There is a separate protective tube,
One end of each support part is fixed by the fastener through the hole of the fixing part inside the head case, and the expansion part and the pusher part are assembled in sequence in the slip part of the head case, and the protective tube surrounding the support part at the end of the protruding pusher part is forbidden. Configured to fit,
When a force is applied to the protective tube in the direction of the headcase, the pusher part pushes the extension part and expands the extension part moving along the inclined part, and the pusher also expands while moving on the inclined part of the headcase.
A ground anchor characterized in that to increase the adhesion and fixing force with the drilling hole.
The method of claim 2,
The head case further comprises a cone portion having a narrower cross section, and the head case is configured to be separated and assembled into two parts in the configuration portion,
The pusher part and the slip part are assembled by a key combination in which the key and the key groove are assembled. The protruding key forms a cross section narrowing along the pusher direction, and the key groove having a shape corresponding to the key is narrowed along the inclined part direction. Form a cross section,
The end of the protective tube is fitted to the protective tube to further constitute a cap to block the end of the protective tube,
It is easy to assemble and disassemble the head case, the ground anchor can be easily installed by the cone part and the cap, and the ground anchor prevents the pusher part from being separated by the key.
The method of claim 2,
Fixtures for fixing the support portion inside the headcase is composed of a wedge,
The wedge is a cylindrical through-hole structure, the inner periphery of the penetrating projections, the cross-section is formed from a wider thickness from one end to the other end, the wedge is divided into a plurality of structures along the circumferential direction, The hole of the fixture is formed in a cross section that becomes wider from one side to the other side, the wedge fixed to the support is fitted in the hole to fix the support,
The pusher portion, which is opposed to the enlarged portion, is integrally formed with a pusher having a larger diameter than the pusher portion, and the inner portion of the pusher is formed with a sliding hole having a diameter larger than that of the pusher portion,
Grounding is characterized in that the support is easy to be fixed by the coupling of the wedge and the hole, and the expansion part that is cylindrically enlarged and the pusher part is further expanded while moving along the inclined part of the headcase, thereby increasing the adhesion and fixing force. anchor.
5. The method of claim 4,
The resin part made of a resin material is further composed of a main body for forming a plurality of through holes and a temporary plate that blocks one surface of the main body.
The resin part is further provided inside the head case, and the resin part is provided by inserting the protruding end of the support part fixed by the fixing part and the wedge into each through hole of the resin part,
When hitting the support portion of the end of the protective tube, the end of the support portion passes through the resin portion while breaking the temporary plate, the wedge is divided and separated as it hits the main body, the fixed support portion is separated from the fasteners, it is easy to remove the support portion Ground anchor.
6. The method of claim 5,
The conical portion of the head portion of the head case further forms a cone portion that gradually narrows in cross section,
The front part and the rear part of the headcase are configured to be separated and assembled into two in a component part facing each other,
The pusher part and the slip part are assembled by a key combination in which the key and the key groove are assembled. The protruding key forms a cross section that narrows along the pusher direction, and the key groove having a shape corresponding to the key has a narrow section along the direction of the inclined portion. Are formed, and these pusher portions and slip portions are assembled to each other,
At the end of the sheath, the cap is fitted to the sheath to further block
It is easy to assemble and disassemble the head case, the ground anchor can be easily installed by the cone part and the cap, and the ground anchor prevents the pusher part from being separated by the key.
delete In the construction method of the ground anchor to construct in the construction site of the slope and the earth fence,
A ground anchor according to any one of claims 2 to 6, a corrugated pipe having a length corresponding to 1/5 to 1/3 of the length of the supporting portion included in the ground anchor, a conventional pressure plate and a spacer,
Construction site cleaning step (S0) for arranging the construction site in a conventional manner;
A drilling step (S1) of forming a drilling hole by drilling a place to install a ground anchor marked in advance to a ground anchor construction depth;
A corrugated pipe is installed to the main body of the pusher of the ground anchor, and the tubular auxiliary tube of a tubular structure forming a ring-shaped space is formed at the end of the corrugated pipe so as to be positioned, and a spacer is installed in a conventional manner. A ground anchor seating step (S2) of inserting a ground anchor having a plurality of hoses for supplying ash into a drilling hole;
Ground anchor fixing step (S3) for expanding the expansion by pressing or hitting the protective tube;
Acupressure plate installation step (S4) for installing the acupressure plate on the support portion protruding to the ground;
The grout material is supplied through the hose to grout the inside of the drilling hole first, and then the grouting material is supplied to the inside of the auxiliary tube so that the expanded auxiliary tube is in close contact with the ground anchor and the drilling hole. Grouting and curing step (S5) to further grout the perforated hole of the, and then to cure over time, thereby increasing the density of grouting of the head portion and having an excellent fixation force;
Anchor construction method using a ground anchor, characterized in that completed by the tension step (S6) to pull the support portion protruding over the pressure plate (S6)

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