KR102172176B1 - Apparatus and method for reinforcing basic of steel tower - Google Patents

Abstract

The present invention relates to a reinforcing device and a method for reinforcing a pylon foundation, and is inserted into a hole 7 drilled in the existing pylon foundation 1 to communicate with the drilling hole 7 at the bottom of the foundation 1 Inserted up to the extension hole 9 drilled into the rock ground, and assembled to the anchor 100 and the anchor 100 having an outer diameter threaded, and extending the outer diameter, a pulling force reinforcing material 200 fixed to the outer wall of the rock ground and the It is assembled to the anchor 100 and includes an anchor plate reinforcing material 400 that applies a pulling force and a compressive force to the anchor 100. The present invention has the advantage that it is possible to reinforce the steel tower without the need for opening an access road and excavating the foundation of the steel tower, and it is easy to apply on-site and is applied to the site to secure structural stability.

Description

Steel tower foundation reinforcement device and reinforcement method {APPARATUS AND METHOD FOR REINFORCING BASIC OF STEEL TOWER}

The present invention relates to a steel tower foundation reinforcement apparatus and a reinforcement method, and more particularly, to a steel tower foundation reinforcement apparatus and a reinforcement method for foundation reinforcement work of a distribution tower.

Since the distribution tower is accompanied by the foundation structure on the ground, the strength of the foundation decreases structurally when floating displacement occurs due to the workability of the foundation buried under the ground, crust change of the ground due to heavy rain, topography change, and the creation of large structures in the vicinity. Or shows severe deformation.

Therefore, if the construction condition of the steel tower is checked and the foundation is soft ground, or if the foundation floating displacement occurs due to changes in load conditions and topography, the steel tower reverse T-type foundation reinforcement work is performed to reinforce the foundation.

As shown in Fig. 1, the reinforcement of a steel tower inverted T-type foundation is a pull-out reinforcement replacement method (a) for reinforcing the pull-out force of the steel tower foundation, a horizontal reinforcement replacement method (b) for reinforcing horizontal force, and a composite reinforcing method, overlaying. Construction method (c) can be applied, and the reinforcement method is determined in consideration of loads transmitted from the top of the tower, such as compressive force, pulling force, and horizontal force.

In the reinforcement of the tower's inverted T-type foundation, an access road is opened through logging, cutting, and embankment, and excavation equipment (backhoe, etc.) and material transport vehicles enter the tower foundation construction site to excavate the tower site, and then the tower reverse T Foundation (1) Reinforce the tower foundation in the order of reinforcement, formwork assembly, concrete placement (3), and backfill.

And, when the reinforcement of the foundation of the steel tower is completed, site arrangement around the foundation, restoration of damaged areas, and drainage work are carried out. In other words, the mountain area used as the access road is restored to its original state through restoration of the road, seeding of grass seed, and planting trees, and the farmland is cleared and the restoration status is checked in the presence of the owner, etc., and the competent authority (National Marine Park, Local government) etc., etc.

However, most of the power distribution towers are located in the mountainous area on the shore of the land and the mountainous area on the coast of the island (island), and many of them are located in the maritime national park, so the installation location is limited. It has geographic characteristics.

In addition, due to the recent revitalization of the tourism and leisure industry, new pension construction is increasing by opening coastal roads in coastal or island areas with good prospects.Therefore, demands for the removal of distribution towers from owners and neighbors of steel towers located in coastal or mountainous areas are increasing rapidly. to be.

Under such circumstances, it is difficult to open an access road to enter the excavation equipment for the foundation reinforcement of the distribution tower or to obtain the consent of the land owner located within the access road, so that it is impossible to submit the land use consent required for the temporary use of mountain or farmland to the local government. Therefore, it is not possible to permit construction as well as permits. And even if the land owner's consent to use is obtained, the consultation period takes several months to several years, so the construction is suspended for a long time due to delays in licensing.

Patent Document 1: Registration Patent No. 0662883 (registered on December 21, 2006)

It is an object of the present invention to provide a steel tower foundation reinforcement device and a reinforcement method that enables a steel tower reinforcement construction without the need for opening an access road and excavating the foundation of a steel tower, making it easy to apply on-site, and ensuring structural stability.

According to the features of the present invention for achieving the above object, the present invention is an extension hole drilled into the rock ground below the foundation to communicate with the drilled hole by inserting it into the drilled hole drilled in the existing pylon foundation. It includes an anchor that is inserted up to and has an outer diameter threaded to the anchor, a pull-out force reinforcing material that is fixed to the outer wall of the rock ground by expanding the outer diameter, and an anchor plate reinforcement material that is assembled to the anchor and applies a pulling force and compression force to the anchor. .

The pull-out force reinforcing material is a pull-out stiffener fixed to the outer wall of the rock ground by expanding its outer diameter, a pull-out stiffener coupler that supports the pull-out stiffener so that the outer diameter of the pull-out stiffener can be expanded, and a pull-out stiffener height adjustment nut that fixes the position of the pull-out stiffener and rotates. It includes a pulling force reinforcing nut for transmitting a force to the pulling stiffener and a circular plate for transmitting the force transmitted from the pulling force reinforcing nut to the pulling stiffener.

The pulling force reinforcing material is assembled from top to bottom in the order of a pulling stiffener height adjustment nut, a pulling stiffener coupler, a pulling stiffener, a circular plate and a pulling force reinforcing nut to the anchor.

It further comprises a pulling force reinforcing nut tightening material for tightening the pulling reinforcing material by rotating the pulling force reinforcing nut.

The pull-out stiffener has a cylindrical shape with one side open in the longitudinal direction, and the pull-out stiffener coupler has a truncated cone shape whose outer diameter gradually increases, and when the pulling force reinforcing nut is rotated, the inner diameter of the pull-out stiffener is inserted into the outer diameter of the pull-out stiffener coupler. By being tightened, the outer diameter of the drawn reinforcement is expanded.

The circular plate and the pull-out reinforcement coupler have a through hole and a passage through which the cement milk passes.

It is assembled to the anchor and is located between the foundation and the rock and includes a horizontal force reinforcing material for reinforcing horizontal force.

The horizontal force reinforcing material includes a horizontal force stiffener having a predetermined length, and an upper nut and a lower nut that are positioned above and below the horizontal force stiffener to fix the position of the horizontal force stiffener.

The anchor plate reinforcement material is positioned between the compression force reinforcing nut and the plate to support compression force and pulling force by being positioned on the upper surface of the base and the compression force reinforcing nut positioned above the perforated hole to transmit the compressive force to the anchor. The compression force reinforcing nut and the height adjustment washer that integrates the plate, the upper washer positioned on the top of the plate, and a pulling force that is assembled at the top end of the anchor and tightens the anchor and the plate to generate a pulling force and transmits a force to the anchor It includes a horizontal adjustment washer for maintaining the human nut and the pulling force human nut horizontally, and a flat washer positioned between the pulling force human nut and the horizontal adjustment washer.

The anchor plate reinforcing material is assembled from top to bottom in the order of a compression force reinforcing nut, a height adjustment washer, a plate, an upper washer, a horizontal adjustment washer, a flat washer, and a pulling force man nut to the anchor.

Drilling a perforation hole in the existing pylon foundation, drilling an extension hole to the rocky ground under the foundation so as to communicate with the perforation hole, and assembling a pulling force reinforcing material on the lower side of the anchor, and the pulling force reinforcing material Inserting the anchor to the extension hole through the perforation hole so as to be located in the extension hole, expanding the outer diameter of the pulling force reinforcing material and fixing it to the outer wall of the rock ground, and applying cement milk to the extension hole and the perforated hole. After injecting to integrate the anchor and the rock mass, assembling an anchor plate reinforcing material to the anchor to apply a pulling force and a compressive force to the anchor.

The pull-out force reinforcement material is a pull-out stiffener height adjustment nut, a pull-out stiffener coupler, a pull-out stiffener, a circular plate, and a pull-out force-reinforcement nut are assembled to the anchor in order from top to bottom.

The pulling force reinforcing nut is rotated with a reinforcing nut tightening material so that the inner diameter of the pulling stiffener is tightened to the outer diameter of the circular plate so that the outer diameter of the pulling stiffener is expanded.

Before injecting cement milk into the extension hole and the perforation hole, a horizontal force reinforcing material for reinforcing horizontal force is assembled to the anchor so that the horizontal force reinforcing material is located between the foundation and the rock.

The horizontal force reinforcing material is assembled to the anchor in a sequence of a lower nut, a horizontal force reinforcement, and an upper nut, and the lower nut and the upper nut fix the position of the horizontal force reinforcement.

The anchor plate reinforcing material is assembled from top to bottom in the order of a compression force reinforcing nut, a height adjustment washer, a plate, an upper washer, a horizontal adjustment washer, a flat washer, and a pulling force man nut to the anchor.

In the present invention, an anchor is inserted after drilling the existing steel tower foundation and the rock ground supporting it, and a pull-out reinforcing material, a horizontal force reinforcing material, an anchor plate reinforcing material, etc. are combined to the anchor, and the foundation, anchor, and rock ground are cemented. By integrating with milk, structural stability is secured while reinforcing insufficient pulling force and insufficient horizontal force.

As described above, the present invention enables reinforcement of the pulling force and horizontal force of the foundation of the existing steel tower in a place where the work space is narrow and heavy equipment is difficult to enter, such as a heavy tensioning device, so that construction is easy, the construction period can be shortened, and the construction cost is low. And, compared with the conventional micropile reinforcement method, since it is not an open-ended type (using large heavy equipment), the occupied area is minimized and there is an eco-friendly effect.

1 is a view showing a conventional steel tower inverted T-type foundation reinforcement method.
Figure 2 is a cross-sectional view showing a state in which the reverse T foundation of the steel tower is reinforced with the steel tower foundation reinforcement device according to the present invention.
Figure 3 is a front view showing a steel tower foundation reinforcement device according to the present invention.
Figure 4 is a view showing a pull-out force reinforcing material in the steel tower foundation reinforcement device according to the present invention.
5 is a view showing a horizontal force reinforcing material in the steel tower foundation reinforcement device according to the present invention.
6 is a view showing an anchor plate reinforcement material in the steel tower foundation reinforcement device according to the present invention.
Figure 7 is a cross-sectional view of the anchor plate reinforcement material in the steel tower foundation reinforcement device according to the present invention.
8 is a view showing an example in which only a pull-out reinforcing material and an anchor plate reinforcing material are applied in the steel tower foundation reinforcing device according to the present invention.
9 is a view showing an example in which only the horizontal force reinforcement material and the anchor plate reinforcement material are applied in the steel tower foundation reinforcement apparatus according to the present invention.
Figure 10 is a schematic view showing a test method of a pylon foundation reinforcement method using the pylon foundation reinforcement device according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 2, the steel tower foundation reinforcing device 10 of the present invention includes an anchor 100, a pulling force reinforcing material 200, a horizontal force reinforcing material 300, and an anchor plate reinforcing material 400.

The steel tower foundation reinforcement apparatus 10 of the present invention is for reinforcing an inverted T-type foundation of an existing distribution tower. The inverted T-type foundation is called a pylon foundation or foundation.

The pylon foundation reinforcement device (10) inserts the anchor 100 after drilling the pylon foundation (1) and the rock ground supporting it, and installs a reinforcing material 200 on the rock ground, and the foundation (1) After installing and fixing a horizontal force reinforcing material 300 between the and the rock, cement milk 500 is injected to integrate the foundation 1, the anchor 100, and the rock to ensure structural stability.

The anchor 100 is made of a steel bar and a thread is formed in the outer diameter. The thread formed on the outer diameter of the anchor 100 is for assembling the pull-out force reinforcing material 200, the horizontal force reinforcing material 300, and the anchor plate reinforcing material 400 to the anchor 100.

The anchor 100 is inserted into the perforation hole 7 drilled in the existing installed pylon foundation 1 to communicate with the perforated hole 7 until the extension hole 9 drilled into the rock ground below the foundation table 1 Insert. The perforated hole 7 is formed at a position that does not interfere with the main material of the pylon 5 installed on the foundation 1. The perforated hole 7 and the extension hole 9 are formed perpendicular to the base 1. When considering the upper standard of the foundation 1, the diameter of the perforated hole can be formed in the range of 75 to 88mm. And the diameter of the anchor may be in the range of 26 ~ 32mm.

The pulling force reinforcing material 200 is assembled under the anchor 100. The pulling force reinforcing material 200 is fixed to the outer wall of the rock by expanding the outer diameter to reinforce the pulling force. The horizontal force reinforcing material 300 is assembled at the lower or middle portion of the anchor 100 and is positioned between the foundation 1 and the rock to reinforce the horizontal force. The anchor plate reinforcing material 400 is assembled on the top of the anchor 100 and applies a pulling force and a compressive force to the anchor 100.

The pulling force reinforcing material 200 and the horizontal force reinforcing material 300 may be selectively assembled to the anchor 100.

3 and 4, the pulling force reinforcing material 200 includes a pulling stiffener height adjustment nut 210, a pulling stiffener coupler 220, a pulling stiffener 230, a circular plate 240 and a pulling force reinforcing nut ( 250), which are sequentially assembled to the anchor 100 from top to bottom.

The pull stiffener height adjustment nut 210 fixes the position of the pull stiffener 230. The pull-out stiffener height adjustment nut 210 is first assembled to the anchor 100 so that the pull-out stiffener 230 is located on a good rock ground to fix the position of the pull-out stiffener 230. The pull-out stiffener height adjustment nut 210 is formed in a shape of a long hexagonal nut, and a thread corresponding to the outer diameter thread of the anchor 100 is formed in the inner diameter.

The drawn stiffener coupler 220 supports the drawn stiffener 230 so that the outer diameter of the drawn stiffener 230 can be expanded. The drawn stiffener coupler 220 has a truncated cone shape whose outer diameter gradually increases. As the inner diameter of the drawn stiffener 230 is tightened to the outer diameter of the drawn stiffener coupler 220, the outer diameter of the drawn stiffener 230 is expanded. The pull-out reinforcement coupler 220 has a plurality of passages 221 through which the cement milk 500 passes in the longitudinal direction around the outer diameter. The passage 221 is formed in a concave through hole shape.

The outer diameter of the drawn stiffener coupler 220 is a narrow portion is relatively small compared to the inner diameter of the drawn stiffener 230 and a wide portion is relatively large compared to the inner diameter of the drawn stiffener 230, and the outer diameter of the drawn stiffener 230 is a drawn stiffener It is possible to expand the outer diameter of the drawn stiffener 230 by being tightened to the inner diameter of the coupler 220.

When the pull-out reinforcement nut 250 is rotated, the outer diameter of the pull-out stiffener 230 is expanded and is fixed to the outer wall of the rock ground. The drawn stiffener 230 has a cylindrical shape with one side open in the longitudinal direction. As the inner diameter of the drawn stiffener 230 is inserted and tightened in the outer diameter of the drawn stiffener coupler 220, the opening 231 of the drawn stiffener 230 is opened, so that the outer diameter of the drawn stiffener 230 can be expanded.

The circular plate 240 transmits the force transmitted from the pulling force reinforcing nut 250 to the pulling stiffener 230. The circular plate 240 has a plurality of through holes 241 through which the cement milk 500 passes.

The pulling force reinforcing nut 250 transmits force to the pulling stiffener 230 by rotation to expand the outer diameter of the pulling stiffener 230. Specifically, when the pull-out force reinforcing nut 250 is rotated, the inner diameter of the pull-out stiffener 230 is inserted and tightened in the outer diameter of the pull-out stiffener coupler 220, so that the outer diameter of the pull-out stiffener 230 is expanded and the pull-out stiffener 230 is It is tightly fixed to the outer wall of the rock ground.

The pulling force reinforcing nut 250 has both side tightening grooves 251 formed on the upper surface. Both side tightening grooves 251 are coupled to both side tightening protrusions 261 of the pulling force reinforcing nut fastener 260 for rotating the pulling force reinforcing nut 250.

The pulling force reinforcing nut tightening member 260 is for tightening the pulling stiffener 230 by rotating the pulling force reinforcing nut 250. The pulling force reinforcing nut fastener 260 is formed in a cylindrical shape with an upper and lower opening, and a thread 263 for coupling with a long pipe is formed at one outer diameter, and both tightening protrusions 261 protrude downward on the opposite outer diameter.

In the state in which the long pipe 270 is screwed to the thread 263 of the pull-out reinforcing nut fastener 260, it is coupled to the anchor 100 located in the perforated hole 7, and tightens both sides of the pull-out reinforcing nut fastener 260 The pulling force reinforcing nut 250 may be rotated by rotating the long pipe 270 by coupling the protrusion 261 to the tightening grooves 251 on both sides of the pulling force reinforcing nut 250. The pulling force reinforcing nut tightening member 260 may remove the state coupled to the anchor 100 after expanding the outer diameter of the pulling force reinforcing nut 250 by rotating the pulling force reinforcing nut 250. That is, the pulling force reinforcing nut fastener 260 is used as a tool for rotating the pulling force reinforcing nut 250 by combining with the long pipe 270.

3 and 5, the horizontal force reinforcing material 300 includes a lower nut 310, a horizontal force reinforcement 320 and an upper nut 330, and the anchor 100 has a lower nut 310, The horizontal force stiffener 320 and the upper nut 330 are combined in this order.

The upper nut 330 and the lower nut 310 are positioned above and below the horizontal force stiffener 320 and serve to fix the position of the horizontal force stiffener 320. The upper nut 330 and the lower nut 310 fix the position of the horizontal force stiffener 320 so that the horizontal force stiffener 320 is positioned between the foundation 1 and the rock ground.

The horizontal force stiffener 320 is formed in a cylindrical shape having a predetermined length. The horizontal force stiffener 320 is assembled to the anchor 100 to reinforce the horizontal force. For example, the horizontal force stiffener 320 may be made of steel having a length of 2m, a thickness of 10.5mm, and a diameter of 60mm. In addition, the upper nut 330 and the lower nut 310 adjust the insertion position of the horizontal force stiffener 320 so that the horizontal force stiffener 320 is positioned at the upper 1m and the lower 1m between the foundation 1 and the rocky ground.

The upper nut 330 and the lower nut 310 have tool grooves 311 and 331 formed therein. The tool grooves 311 and 331 may be grooves in which a tool for rotating the upper nut 330 and the lower nut 310 is coupled to assemble the upper nut 330 and the lower nut 310 to the anchor. Although not shown, the tool grooves 311 and 331 may have protrusions of a nut tightening member coupled to a long pipe. Alternatively, the upper nut 330 and the lower nut 310 may be rotated by a tool holding the outer diameters of the upper nut 330 and the lower nut 310.

3 and 6, the anchor plate reinforcement material 400 is a compression force reinforcement nut 410, a height adjustment washer 420, a plate 430, an upper washer 440, a horizontal adjustment washer 450 , A plain washer 460 and a pulling force human nut 470. Anchor plate reinforcement material 400 is a compression force reinforcing nut 410, a height adjustment washer 420, a plate 430, an upper washer 440, a horizontal adjustment washer 450, a flat washer 460 in the anchor 100 And the pulling force is assembled from the top to the bottom in the order of the human nut 470.

The compressive force reinforcing nut 410 is located above the perforated hole 7 and transmits the compressive force to the anchor 100. The coupling protrusion 411 protrudes from the upper surface of the compression force reinforcing nut 410. The coupling protrusion 411 is coupled to the fitting groove 421 of the washer 420 for height adjustment.

The height adjustment washer 420 is located between the compression force reinforcing nut 410 and the plate 430 to integrate the compression force reinforcing nut 410 and the plate 430. When the plate 430 is rotated, the compression force reinforcing nut 410 located in the perforated hole 7 of the foundation 1 is also rotated at the same time to adjust the height up and down, and the plate 430 and the compression force reinforcing nut 410 are integrated. Let it.

The height adjustment washer 420 has an outer diameter partly formed to be inclined upward, a fitting groove 421 is formed at a lower inner diameter, and a fitting protrusion 423 is formed at an upper inner diameter. The coupling protrusion 411 of the compression force reinforcing nut 410 is coupled to the fitting groove 421 of the height adjustment washer 420, and the fitting protrusion 423 of the height adjustment washer 420 is a coupling groove 433 of the plate 430 ).

The coupling protrusion 411 of the compression force reinforcing nut 410 is coupled to the fitting groove 421 of the height adjustment washer 420, and the fitting protrusion 423 of the height adjustment washer 420 is a coupling groove of the plate 430 ( The compression force reinforcing nut 410 is coupled to 433 and is integrated with the plate 430, and when the plate 430 is rotated, the compression force reinforcing nut 410 also rotates at the same time.

The plate 430 is located on the upper surface of the base 1 and supports the compressive force and the pulling force.

The plate 430 has a cylindrical shape and insertion grooves 431 and 432 are formed in the upper and lower portions. The height adjustment washer 420 is positioned in the lower insertion groove 431 of the plate 430 and the upper washer 440 is positioned in the upper insertion groove 432 of the plate 430. The lower insertion groove 431 and the upper insertion groove 432 are formed in a shape corresponding to an outer diameter of the height adjustment washer 420 and the upper washer 440. A coupling groove 433 concave into the lower insertion groove 431 of the plate 430 is further formed. The fitting protrusion 423 of the height adjustment washer 420 is coupled to the coupling groove 433 formed in the lower insertion groove 431 of the plate 430.

The upper washer 440 is located above the plate 430. The upper washer 440 has an outer diameter partially inclined downward so as to correspond to the upper insertion groove 432 of the plate 430. The upper washer 440 is for increasing the tightening force between the plate 430 and the washer 450 for horizontal adjustment.

The horizontal adjustment washer 450 is for maintaining the pulling force human nut 470 horizontally. A washer 450 for horizontal adjustment of the inclination occurring on the upper surface of the foundation 1 is installed to maintain the level of the pulling force human nut 470. The horizontal adjustment washer 450 is formed in a shape including a left and right slope.

The flat washer 460 is located between the pulling force human nut 470 and the horizontal adjustment washer 450. The flat washer 460 increases the frictional force between the pulling force human nut 470 and the horizontal adjustment washer 450 so that the force for tightening the pulling force human nut 470 is transmitted to the plate 430.

Pulling force The human nut 470 is assembled at the top of the anchor 100 and generates a pulling force by tightening the anchor 100 and the plate 430 and transmits the force to the anchor 100. The pulling force human nut 470 may be fastened to the anchor 100 by forming a thread corresponding to the outer diameter thread of the anchor 100 in the inner diameter.

As shown in Figure 7, the plate 430 is located on the upper surface of the base (1), the compression force reinforcing nut 410 is disposed on the top of the perforated hole 7, the compression force reinforcing nut 410 is for height adjustment It is integrated with the plate 430 by the washer 420. That is, the coupling protrusion 411 of the compression force reinforcing nut 410 is coupled to the fitting groove 421 of the height adjustment washer 420, and a part of the height adjustment washer 420 is the lower insertion groove 431 of the plate 430 ), the fitting protrusion 423 of the height adjustment washer 420 is coupled to the coupling groove 433 of the plate 430, so that the compression force reinforcing nut 410 and the plate 430 are integrated.

Accordingly, when the pulling force human nut 470 is tightened, the plate 430 is pulled upward and the pulling force by the plate 430 is transmitted to the anchor 100, and the cement milk 500 and the compressive force reinforcing nut 410 The compressive force is transmitted to the anchor 100.

8 and 9, the pulling force reinforcing material 200 and the horizontal force reinforcing material 300 may be selectively assembled to the anchor 100.

As shown in FIG. 8, the pulling force reinforcing material 200 is assembled at the lower part of the anchor 100, and the anchor plate reinforcing material 400 is assembled on the upper part of the anchor 100 to provide pulling force and compression force to the anchor 100. Can be added.

Alternatively, as shown in FIG. 9, the horizontal force reinforcing material 300 is assembled on the lower or middle portion of the anchor 100, and the anchor plate reinforcing material 400 is assembled on the upper portion of the anchor 100 to thereby the anchor 100 ) Can be applied with pulling force and compression force.

Alternatively, only one or more selected from the pull-out force reinforcing material 200 and the horizontal force reinforcement material 300 may be assembled to the anchor 100.

On the other hand, the pylon foundation reinforcement method using the pylon foundation reinforcement device 10, as shown in Fig. 2, a) drill a hole 7 in the existing pylon foundation 1 and communicate with the hole 7 Step of drilling the extension hole 9 to the bottom of the foundation (1) so as to be possible, and b) assembling the pulling force reinforcing material 200 on the lower side of the anchor 100, and the pulling force reinforcing material 200 to the extension hole ( 9) inserting the anchor 100 to the extension hole 9 through the perforated hole 7 and c) expanding the outer diameter of the pull-out reinforcing material 200 and fixing it to the outer wall of the rock ground; and d) After cement milk 500 is injected into the extension hole 9 and the perforation hole 7 to integrate the anchor 100 and the rock ground, the anchor plate reinforcement material 400 is assembled to the anchor 100 to provide the anchor 100 ) And applying a pulling force and a compression force.

In step a), drilling of the foundation 1 and the rock can be performed using a portable boring device. The portable boring device is easy to grip and transport by the operator.

In step b), as shown in Figure 4, the pull-out reinforcing material 200 is a pull-out stiffener height adjustment nut 210, a pull-out stiffener coupler 220, a pull-out stiffener 230, a circular plate ( 240) and the pulling force reinforcing nut 250 are assembled in this order. The anchor 100 to which the reinforcing material 200 is assembled is inserted into the extension hole 9 through the perforated hole 7.

In step c), the pulling force reinforcing nut 250 located in the extension hole 9 of the rock ground is rotated using the pulling force reinforcing nut fastener 260 to transmit the force to the pulling reinforcing member 230. When the pull-out force reinforcing nut 250 is rotated with the pull-out force reinforcing nut fastener 260, the inner diameter of the pull-out stiffener 230 is inserted into the outer diameter of the pull-out reinforcing material coupler 220 and is tightened, so that the opening 231 of the pull-out stiffener 230 As is unfolding, the outer diameter expands. That is, the pulled stiffener 230 is firmly fixed to the outer wall of the rock through the expansion of the outer diameter of the pulled stiffener 230.

In step d), cement milk (grout) is injected into the hole 7 and the extension hole 9 to cure.

At this time, the through hole 241 is formed in the circular plate 240 and the passage 221 is formed in the outer diameter of the drawn reinforcement coupler 220 so that the cement milk 500 extends through the through hole 241 and the passage 221 It can be smoothly injected into the lower part of the hole 9.

Before injecting the cement milk 500 into the extension hole 9 and the perforation hole 7, the horizontal force reinforcing material 300 to reinforce the horizontal force is assembled to the anchor 100 so that the horizontal force reinforcing material 300 is It can be located between 1) and the rocky ground.

As shown in FIG. 5, the horizontal force reinforcing material 300 is assembled to the anchor 100 in the order of the lower nut 310, the horizontal force reinforcing material 320, and the upper nut 330. The lower nut 310 and the upper nut 330 fix the position of the horizontal force stiffener 320 so as to be positioned between the foundation 1 and the rocky ground.

After curing the cement milk 500, the anchor plate reinforcing material 400 is assembled to the anchor 100.

As shown in Figure 6, the anchor plate reinforcing material 400 is a compression force reinforcing nut 410, a height adjustment washer 420, a plate 430, an upper washer 440, a horizontal adjustment washer ( 450), a flat washer 460 and a pulling force human nut 470 are assembled in this order.

The compression force reinforcing nut 410 is located at the top of the perforated hole 7 and the plate 430 is supported on the upper surface of the base 1, and the compression force reinforcing nut 410 and the plate 430 are washers 420 for height adjustment. When the plate 430 is integrally fixed by the rotation of the compression force reinforcing nut 410 is also rotated integrally. In this state, a pulling force and a compressive force can be applied to the anchor 100 by tightening the pulling force human nut 470.

Hereinafter, the operation of the present invention will be described.

In the present invention, after drilling the existing installed pylon foundation 1 and the rock ground supporting it, the anchor 100 assembled with the pulling force reinforcing material 200 is inserted into the punching hole 7 to insert the pulling force reinforcing material 200 ) Is fixed to the outer wall of the rock ground.

In addition, the horizontal force reinforcing material 300 is assembled to the anchor 100, and the horizontal force reinforcing material 300 is fixed to be positioned between the foundation 1 and the rocky ground.

Thereafter, cement milk 500 is injected into the perforated hole 7 and cured, and then the anchor plate reinforcing material 400 is assembled on the top of the anchor 100 to apply a pulling force and a compressive force to the anchor 100. The installed steel tower foundation (1) can be reinforced.

Since the drilling equipment is small, it does not require a conventional large heavy equipment, so it does not require opening to enter, and does not require permission from land owners and competent authorities. In addition, since only the cement milk 500 injected into the perforated hole 7 and the extension hole 9 is cured, the curing period is 15 to 20 days, compared to 90 to 180 days when curing with concrete pouring. It can be greatly reduced.

In addition, the construction cost is low because it does not require large heavy equipment and can transport anchors and various reinforcing materials by manpower. In addition, compared to the conventional micropile reinforcement method, since it is not an open-close type (use of large heavy equipment), the occupied area is minimized and is eco-friendly.

Hereinafter, the method for reinforcing a pylon foundation using the above-described pylon foundation reinforcing device will be described through experimental results in order to confirm whether reinforcing pulling force and horizontal force are possible.

FIG. 10 is a schematic diagram showing a test method of a method for reinforcing a foundation for a steel tower using the apparatus for reinforcing a foundation for a steel tower according to the present invention.

Test location: Mount 115, Bongsan-ri, Mongtan-myeon, Muan-gun, Jeollanam-do

Test drilling: 6 holes [75mm diameter 3 holes, 88mm diameter 3 holes]

Drilling quantity: 24m [diameter 75mm-4m×3 holes, diameter 88mm-4m×3 holes]

Drilled ground: soft rock ground

Test period: 10 days

[Unit: kN] division Test Items Anchor reinforcement
Material composition Test number Drilling depth
H=30.m H=4.0m Perforation φ75mm
Anchor φ26.5mm Pulling force Cement milk [Picture #1] 550kN Pulling force Cement milk + pull-out reinforcing material [Picture #2] 569kN Pulling force, horizontal force Cement milk + horizontal force reinforcing material [Picture #3] 560kN(person)
75kN(male) Perforation φ88mm
Anchor φ32.0mm Pulling force Cement milk [Picture #1] 805kN Pulling force Cement milk + pull-out reinforcing material [Picture #2] 811kN Pulling force, horizontal force Cement milk + horizontal force reinforcing material [Picture #3] 802kN(person)
80kN(male)

(Person): Pulling force, (Number): Horizontal force

From the test results in Table 1, it was confirmed that the pull-out force and the horizontal force were reinforced in the actual distribution tower in operation, and as a result, the ease of application in the field was confirmed.

The above-described method of reinforcing the foundation of the steel tower does not require opening of an access road and excavation of the site, so there is no damage to the natural environment caused by logging, cutting soil, and sand treatment, and since no construction equipment is used, there is little noise, vibration, and scattering dust. It is a construction method.

The above-described pylon foundation reinforcement device is an exposed type in which the anchor plate reinforcement material is exposed above the upper surface of the foundation, and is installed on the foundation of the existing pylon, but the anchor plate reinforcement material is embedded in the perforated hole formed in the foundation and is not exposed to the outside. It can also be installed in a buried type.

The present invention has been disclosed in the drawings and the specification, the best embodiments. Here, specific terms have been used, but these are only used for the purpose of describing the present invention, and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, the present invention will be understood by those of ordinary skill in the art that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical idea of the appended claims.

1: foundation 3: steel tower (mainly)
7: drilling hole 9: extension hole
10: pylon foundation reinforcement device 100: anchor
200: pulling force reinforcing material 210: pulling force reinforcing material height adjustment nut
220: drawn stiffener coupler 221: passage
230: drawn stiffener 231; Opening
240; Round plate 241: through hole
250: pull-out reinforcing nut 251: tightening groove
260: pulling force reinforcing nut fastener 261: tightening protrusion
263: thread 270: long pipe
300: horizontal force reinforcing material 310: lower nut
320: horizontal force stiffener 330: upper nut
400: anchor plate reinforcement material 410: compression force reinforcement nut
411: coupling protrusion 420: washer for height adjustment
421: fitting groove `423: fitting protrusion
430; Plate 431: insertion groove
433: coupling groove 440: upper washer
450: horizontal adjustment washer 460: flat washer
470: pulling force human nut 500: cement milk

Claims (18)

An anchor having a threaded outer diameter inserted into the perforated hole drilled in the existing pylon foundation and inserted into the extension hole drilled in the rock under the foundation so as to communicate with the perforated hole;
A pull-out reinforcing material assembled to the anchor and fixed to the outer wall of the rock by expanding an outer diameter; And
It is assembled to the anchor and includes an anchor plate reinforcing material for applying a pulling force and a compressive force to the anchor,
The pulling force reinforcing material
A drawn stiffener whose outer diameter is expanded and fixed to the outer wall of the rock ground;
A pull-out stiffener coupler supporting so that the outer diameter of the pull-out stiffener can be expanded;
A pull stiffener height adjustment nut for fixing the position of the pull stiffener;
A pulling force reinforcing nut that transmits a force to the pulling stiffener by rotation; And
A circular plate for transmitting the force transmitted from the pulling force reinforcing nut to the pulling stiffener;
Steel tower foundation reinforcement device comprising a. delete The method according to claim 1,
The pulling force reinforcing material
A steel tower foundation reinforcement device, characterized in that the anchor is assembled from top to bottom in the order of a pull-out stiffener height adjustment nut, a pull-out stiffener coupler, a pull-out stiffener, a circular plate, and a pull-out force reinforcing nut. The method of claim 3,
A steel tower foundation reinforcing device, further comprising a pull-out force reinforcing nut tightening member for tightening the pull-out reinforcing member by rotating the pull-out force reinforcing nut. The method of claim 4,
The pull-out stiffener has a cylindrical shape with one side open in the longitudinal direction, and the pull-out stiffener coupler has a truncated cone shape whose outer diameter gradually increases, and when the pull-out force reinforcing nut is rotated, the inner diameter of the pull-out stiffener is inserted into the outer diameter of the pull-out stiffener coupler. The steel tower foundation reinforcement device, characterized in that the outer diameter of the drawn reinforcement is expanded by being tightened. The method of claim 4,
The circular plate and the pull-out reinforcement coupler is a steel tower foundation reinforcement device, characterized in that formed with a through hole and a passage through which cement milk passes. The method according to claim 1,
A steel tower foundation reinforcement device comprising a horizontal force reinforcing material assembled to the anchor and positioned between the foundation and the rock to reinforce a horizontal force. The method of claim 7,
The horizontal force reinforcing material is
A horizontal force stiffener having a predetermined length; And
An upper nut and a lower nut positioned above and below the horizontal force stiffener to fix the position of the horizontal force stiffener;
Steel tower foundation reinforcement device comprising a. The method according to claim 1,
The anchor plate reinforcement material
A compression force reinforcing nut positioned above the perforation hole to transmit a compression force to the anchor;
A plate positioned on the upper surface of the base and supporting a compressive force and a pulling force;
A height adjustment washer positioned between the compression force reinforcing nut and the plate to integrate the compression force reinforcing nut and the plate;
An upper washer positioned above the plate;
A pulling force human nut assembled at the top end of the anchor and generating a pulling force by tightening the anchor and the plate and transmitting a force to the anchor;
A horizontal adjustment washer for maintaining the pulling force human nut horizontally; And
A flat washer positioned between the pulling force human nut and the horizontal adjustment washer;
Steel tower foundation reinforcement device comprising a. The method of claim 9,
The anchor plate reinforcement material
A steel tower foundation reinforcement device, characterized in that the anchor is assembled from top to bottom in the order of a compression force reinforcement nut, a height adjustment washer, a plate, an upper washer, a horizontal adjustment washer, a flat washer, and a pulling force human nut. delete delete delete delete delete delete delete delete

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