KR20050114302A - Steel anchor, thermoset anchor and tensioning equipment, and the method to reinforce the concrete structure with the fiber panel tensioned by them - Google Patents

Abstract

The present invention is to reinforce the concrete structure by using the fiber reinforcement plate, to reinforce the fiber reinforcement plate, the tension device for tensioning the fiber reinforcement plate, the integrated construction with the concrete structure to be subjected to the tension fiber reinforcement plate An object of the present invention is to provide a method for tensioning and constructing a fiber reinforcing plate by a fixing device, a tension device, and a fixing device. More specifically, both ends of the tensioned fiber reinforcement plate are fixed to concrete structures with a fixing system composed of a square plate-shaped anchorage, a U-shaped anchorage, a rectangular parallelepiped steel and a thermosetting resin anchorage. It is also an object of the present invention to provide a tension ball and a tension device for horizontally tensioning a fiber reinforcing plate.

Flexural strength can be increased by introducing compressive stress into the site under tension of the concrete structure to be repaired and reinforced. When the compressive stress is introduced into the concrete structure, the resistance to external loads of the target structure can be increased, thereby suppressing cracks extremely and also preventing the cracks that are already generated from being extended any more. As a result, the flexural strength of the structure is greatly improved, and even the structure in which the warpage has already occurred may be restored to the original state by restoring the warpage.

The present invention relates to a concrete structure prestressing reinforcement method using the fiber reinforcing plate as a reinforcing material to achieve the above object.

Description

Steel anchors, thermoset anchors and tensioning equipment, and the method to reinforce the concrete structure with the fiber panel tensioned by them}

The present invention relates to a method of reinforcing a concrete structure such that prestress is introduced by tensioning and fixing a fiber reinforcing plate. More specifically, the present invention relates to a method of reinforcing integrally with a concrete structure using a separately designed anchorage in a state in which tension is introduced into a fiber reinforcing plate using a separately designed fiber reinforcing plate tension device.

The reinforcing material mainly used in the conventional method of reinforcing by introducing prestress is PC steel wire. PC steel wire prestressing reinforcement method using PC steel wire should install several strands of PC steel wire in a certain concrete member. In this case, several strands of the PC wire should be uniformly tensioned, but it is not easy to uniformly strain each PC wire at the construction site. There is also a problem that the fixing system is very large and complex.

The prestressing reinforcement method for attaching unidirectional fiber boards such as carbon fiber boards (CFRP) to concrete in a tense state has also been used abroad for many years. When reinforcing concrete by this method, by providing elasticity to the concrete to be reinforced, the load capacity can be greatly improved and constrained to prevent cracking of the concrete. However, when installing unidirectional fiber boards such as carbon fiber boards (CFRP) with this prestressing method, the anchor system must be used to fix the fiber boards. It gets worse. In the prestressing method of tensioning the reinforcement, the system for fixing the reinforcement is very important. If the settlement is not strong, the inherent characteristics of this process are lost or greatly reduced.

In addition, in the case of a one-way fiber plate such as carbon fiber plate (CFRP), when the fiber plate is tense and strained in the tension device, the bite is split in the longitudinal direction and tearing occurs, it is difficult to tension as much as the target. This phenomenon occurs because a unidirectional fiber board such as carbon fiber board (CFRP) is produced by arranging fibers in one direction, and it is unavoidable that the fiber board is split in the longitudinal direction. In addition, while fixing the fiber board as a reinforcing material to the surface of the concrete to be reinforced, the anchorage is required to fully support the tension introduced into the fiberboard, for this purpose it is common to remove the concrete portion of the fixing unit installation, then install the anchorage. This results in damage to the concrete being reinforced.

An object of the present invention relates to an external prestressing reinforcing method that is recently attracting attention to solve the weakness of the fixing system, which is a disadvantage mentioned in the prior art, and also when the tension device, the carbon fiber plate bite in the tension device To solve the problem of cracking and tearing of the part of the fiber reinforcing plate such as (CFRP) to ensure that the correct tension is applied throughout the fiber reinforcing plate. In addition, it is easy to install and minimizes damage to the structure to be reinforced by the installation of the fixing system, and has an excellent ability to hold the fiber reinforcing plate as a reinforcing material. To provide a settlement system.

In addition, to provide a fixing system having the characteristics described above can be installed as closely as possible to the reinforcement of the fiber reinforcement sheet to the concrete surface to be reinforced.

In addition, it is to provide a more stable external prestressing reinforcement method by solving the problem of difficulty of uniform tension, which is a disadvantage of the PC steel prestressing reinforcement method.

In order to achieve the above object, the present invention, in reinforcing the concrete structure 700 by tensioning the fiber reinforcement plate 500, fixing to fix both ends of the fiber reinforcement plate 500 to the concrete structure 700 The fixing unit 900 and the tension fixing unit 901 is installed, the tension device 400 for tensioning the fiber reinforcement plate 500 is used.

The configuration of the present invention will be described below with reference to the accompanying drawings.

1 is a method of installing the fixed fixing portion 900 and the tension fixing portion 901 at both ends of the fiber reinforcing plate 500 introduced the tension of the present invention, the fiber reinforcing plate 500 is fixed to the external reinforcement The schematic diagram of the concrete structure 700 is shown.

FIG. 2 is a view showing in detail the fixing fixing part 900 and the tension fixing part 901 installation site of FIG. 1A is a fixed fixing part 900 and FIG. 1B is a tension fixing part 901. Both of the fixing units are composed of a first fixing unit 100 made of a square plate-shaped steel, a second fixing unit 200 made of a U-shaped steel, and a third fixing unit 300 made of a rectangular parallelepiped steel and a thermosetting resin. have.

3 is a bottom view of the fixing fixing part 900 and the tension fixing part 901 installation part of FIG. 2A illustrates a fixed fixing unit 900 and FIG. 2B illustrates a tension fixing unit 901. Both fixing units are composed of a first fixing unit 100, a second fixing unit 200, and a third fixing unit 300.

4 is a view of the first fixing unit 100, the second fixing unit 200 and the third fixing unit 300 and the fiber reinforcing plate 500 constituting the fixed fixing unit 900 and the tension fixing unit 901 of the present invention. As a perspective view showing the installation state, the first fixing unit 100 is fixed to the concrete structure by the anchor bolt-A (120) and the nut 122, the second fixing unit 200 to the buried portion 211 to the concrete structure Buried and anchored using the anchor bolt-B 220, the third fixing unit 300 is gripped by the exposed portion 212 of the second fixing unit 200.

5 is a perspective view of the first fixing unit 100 of the present invention, and is manufactured using a steel sheet. The bolt insertion hole 110 into which the anchor bolt-A 120 is inserted is processed, and the surface in contact with the fiber reinforcement plate 500 has a plurality of straight grooves and the line which are perpendicular to the tension direction of the fiber reinforcement plate 500. Groove 130 is formed of a straight groove forming an angle of 45 degrees with the groove is formed to form an uneven surface. The groove 130 serves as a shear key to improve the ability to grip the fiber reinforcement plate (500).

6 is a second fixing unit 200 of the present invention, which is manufactured using steel, and has a U-shape, two buried portions 211 and one exposed portion 212 is a fixture body having a unitary structure ( The anchor bolt-B 220 and the anchor 225 is assembled to 210. The buried portion 211 has a cylindrical shape, the anchor bolt-B 220 is installed through the center, An anchoring portion groove 228 that can move up and down the anchoring portion 222 constituting the anchor bolt-B (220) at the end is processed, penetrating from the groove 228 to the buried portion 211 outer surface , Anchor insertion groove 226 is formed is the anchor 225 is inserted. The anchor insertion groove 226 is processed into a shape corresponding to the shape of the anchor 225 shown in FIG. 7C. The buried part 211 is a part embedded in the concrete structure. The exposed part 212 has a rounded hexahedron shape at both ends of the portion connected to the buried part 211, and one side of the exposed part 212 is in close contact with the first fixing device 100, and the third fixing device 300 is disposed on the opposite side thereof. Close contact. The embedding portion 211 and the exposed portion 212 are unitary.

FIG. 7 illustrates the anchor bolt-B 220 and the anchor 225 of FIG. 6 in detail. FIG. 7A is a perspective view of the anchor bolt-B 220, in which an anchoring portion 222 is integrated at one end of the bolt portion 221 and an injection nipple 224 is integrated at the opposite end of the bolt portion 221. As a structure, a nut 227 is inserted into the bolt portion 221, and the anchoring portion 222 has a square pyramid shape, and the upper surface thereof is connected to the bolt portion 221. FIG. 7B illustrates a cross section AA in FIG. 7A, in which an injection tube 223 is formed through a center of the injection nipple 224, the bolt part 221, and the anchoring part 222. . When resin is injected through the injection nipple 224 at the top, it flows through the injection tube 223. The state in which the resin injected through the injection tube 223 is filled is shown in FIG. 10. Figure 7c is an anchor 225, the surface in contact with the anchoring portion 222 is processed to a slope corresponding to the inclined surface of the anchoring portion 222 of the square pyramid shape, the opposite surface of the surface is processed in the concrete structure The anchor hole 702 is processed into an arc shape corresponding to the inner surface. The working state of the anchor bolt-B 220 and the anchor 225 is shown in Figures 8 to 11 below.

The process of constructing the second fixing fixture 200 of the present invention configured as described above to the concrete structure 700 will be described in detail as follows.

8 is a cross-sectional view A-A and B-B of FIG. 3, which shows a detailed cross-sectional view of a state in which the second fixing unit 200 of the present invention is inserted into the concrete structure 700. FIG. 8A is a cross section A-A of FIG. 3, and FIG. 8B is a cross section B-B of FIG. 3. The anchor hole 702 for installing the second anchorage 200 is processed in the concrete structure 700, and the buried portion 211 of the second anchorage 200 is inserted into the anchor hole 702. When the nut 227 is tightened in this state, the anchoring portion 222 is pulled and the anchor 225 is in close contact with the inner surface of the anchor hole 702. The inlet portion of the anchor hole 702 is sealed with a sealant 611.

9 is a state in which the above process is completed. In this state, after injecting and filling the thermosetting resin 610 through the injection pipe 223 of the anchor bolt-B 220, when the injected thermosetting resin is cured, the portion of the injection nipple 224 is removed. FIG. 9A is a cross section A-A of FIG. 3, and FIG. 9B is a cross section B-B of FIG. 3.

10 shows a state in which the above process is completed. When the second fixing unit 200 is installed in this way, the fixing unit is fixed in a very solid state. FIG. 10A is a cross section A-A of FIG. 3, and FIG. 10B is a cross section B-B of FIG. 3.

11 illustrates a cross section of a portion of the anchor 225 of the second anchorage 200. FIG. 11A illustrates a cross-sectional view AA of FIG. 8, in which the second fixing unit 200 is inserted into the anchor hole 702 processed in the concrete structure, that is, the anchor 225 is in close contact with the inner surface of the anchor hole 702. The previous section. FIG. 11B illustrates a cross-sectional view A-A of FIG. 9, and illustrates a cross-sectional view A-A with the anchor 225 in close contact with the inner surface of the anchor hole 702.

12 illustrates the third fixing unit 300 of the present invention in detail. FIG. 12A is a perspective view of the third fixing unit 300, and is shown to show the inner surface of the third fixing unit 300 so that the configuration state of the third fixing unit 300 and the fiber reinforcing plate 500 can be seen. The fiber reinforcing plate 500 is arranged to be drawn into the upper end of the side of the third fixing unit body 310 in the form of steel box, and to exit from the lower end of the side indicated by G. By doing so, the fiber reinforcement plate 500 is arranged in a diagonal form inside the third fixing unit body 310.

The portion of the fiber reinforcing plate 500 arranged in a diagonal form in the third fixing unit body 310 is arranged in a state where a plurality of holes 510 are processed. After arranging the fiber reinforcing plate as described above, the thermosetting resin 610 is injected into the third fixing body 310 and filled to harden. When the thermosetting resin 610 is filled and cured as described above, the third fixing unit body 310, the fiber reinforcing plate 500, and the thermosetting resin 610 are integrated. In the hole 510 portion formed in the fiber reinforcing plate, the thermosetting resin 610 is formed in the form of a column spanning the upper and lower portions of the fiber reinforcing plate 500 through the hole 510 formed in the fiber reinforcing plate, and thus the thermosetting resin 500 and the thermosetting resin. The resin 610 serves to further integrate.

In addition, the third reinforcement 300, the fiber reinforcement plate 500 is introduced into the upper end of the side marked with the F of the third fixing unit body 310, the fiber reinforcement plate 500 is to be reinforced surface of the concrete structure 700 It is configured to be installed in close contact with

12B and 12C illustrate cross-sectional views of the third fixing unit 300 in a state where the thermosetting resin 610 is filled.

FIG. 12B shows the section B-B in FIG. 12A. The fiber reinforcing plate 500 and the fiber reinforcing plate 500 arranged diagonally in the third fixing unit body 310 and the body 310 is filled around the fiber reinforcing plate 500 and the third fixing unit body 310 It consists of the thermosetting resin 610 integrated with the.

12C shows the cross section A-A of FIG. 12A. The hole 510 is processed in the fiber reinforcing plate 500 diagonally arranged in the third fixing unit body 310 to penetrate the upper and lower portions of the fiber reinforcing plate 500 to fill the thermosetting resin 610 in the form of a column. , The thermosetting resin 610 and the fiber reinforcement plate 500 is configured to be made better.

FIG. 13 is a perspective view of a fixture body 310 constituting the third anchorage device 300 of the present invention and is made of steel and has a box shape. FIG. 13A is a perspective view of the third fixing unit body 310 viewed from a portion marked with G, and a fiber reinforcing plate outlet 314 through which the fiber reinforcing plate 500 exits is formed at the bottom thereof, and a thermosetting resin is injected into the bottom of the side. There is an injection hole 311 for the upper end, there is an air outlet 312 for discharging air when the thermosetting resin 610 is injected. FIG. 13B is a perspective view viewed from the side indicated by F in FIG. 13A, and the fiber reinforcing plate inlet 313 through which the fiber reinforcing plate 500 is inserted is formed at the upper end thereof.

FIG. 14 shows another embodiment of the third fixing unit 300. In addition to the third fixing unit 300 shown in FIG. 12, the pressing plate 320 of the fiber reinforcing plate 500 which has exited from the side indicated by G in FIG. Arranged on the upper and lower surfaces of the fiber reinforcing plate, the bolt 321 is inserted through the bolt insertion hole 113 of the upper and lower pressing plates 320 and fastened and fixed with a nut 322 to improve fixing force. One side of the pressing plate 320 is fastened by arranging to be in close contact with the rear surface of the third fixing body (310). The bottom portion 323 of the third anchorage body 310 is made of a steel plate thicker than the bottom of the third anchorage body 310 used in FIG. 12, so that one side of the pressing plate 320 arranged under the fiber reinforcement plate is It is configured to play a close role.

FIG. 14B shows the cross section B-B of FIG. 14A, and FIG. 14C shows the cross section A-A of FIG. 14A.

FIG. 15 is a perspective view of the fixing unit body 310 constituting the third fixing unit 300 of FIG. 14 and is made of steel and has a rectangular box shape. FIG. 15A is a perspective view of the third fixing unit body 310 viewed from a portion G, and a fiber reinforcing plate outlet 314 through which the fiber reinforcing plate 500 exits is formed at the bottom thereof. Below the fiber reinforcing plate outlet 314 is shown consisting of a bottom portion 323 thicker than in the third fixing unit body 310 of FIG. When viewed from the side, the injection hole 311 for injecting the thermosetting resin is formed directly on the bottom portion 323, the air outlet 312 is formed at the top of the air discharged when the thermosetting resin 610 is injected. FIG. 15B is a perspective view as viewed from the side marked F in FIG. 15A, wherein the fiber reinforcing plate inlet 313 through which the fiber reinforcing plate 500 is inserted is formed. 15C is a perspective view of the pressing plate 320, and bolt insertion holes 113 are machined at both ends.

FIG. 16 is a fixing fixing part 900 including the first fixing device 100, the second fixing device 200, and the third fixing device 300 is installed, and the first fixing device 100 is installed in the tension fixing part 901. Temporarily installed, the second fixing unit 200 is a schematic diagram showing a state in which the tension device 400 is installed, and the tension is introduced into the fiber reinforcing plate 500 in the installed state.

FIG. 17 is a perspective view illustrating a tension hole 390 installed at one end of the fiber reinforcing plate to tension the fiber reinforcing plate 500 by the tension device 400, and constitutes the tension fixing part 901 of FIG. 16. It is shown with a first anchorage 100 and a second anchorage 200.

FIG. 18 illustrates the tension ball 390 of FIG. 17 in detail. The third fixing device described above in FIG. 12 is manufactured in the shape of the body 391 corresponding to the shape of the tension gripper 420 constituting the tension device 400 shown in FIGS. 22, 23, and 26. It has the same configuration as 300. A tooth key 392 is formed on the front side indicated by F of the tension ball body 391. This corresponds to the shape of the tension gripper 420, when the tensioner 390 is inserted into the tension gripper 420 and the fiber reinforcing plate 500, the tensioner 390 is tension tensioner 420 ) To prevent them from escaping. FIG. 18B shows the cross section B-B of FIG. 18A, and FIG. 18C shows the cross section A-A of FIG. 18A.

FIG. 19 illustrates the tension ball body 391 constituting the tension ball 390 shown in FIG. 18. Except that the tooth key 392 is formed, it has the same structure as the 3rd fixing body 310 shown in FIG.

20 illustrates another embodiment of the tension ball 390. Except that the tooth key 392 is formed, it is the same structure as the 3rd fixing | fixed_tool 300 shown in FIG.

FIG. 21 illustrates the tension ball body 391 constituting the tension ball 390 shown in FIG. 20. Except that the toothed key 392 is formed, it has the same structure as the 3rd fixing body 310 shown in FIG.

22 is a perspective view of a tension device 400 for tensioning the fiber reinforcement plate 500. Bolt-shaped side frame 412, which is a bolt insertion hole 114 for fixing the tension device to the concrete structure 700, the hydraulic cylinder 430 and the rear frame 411 to which one end of the guide bar 413 is fixed. ), A tension frame 410 for holding the tension frame 410 installed at one end of the front frame 410, one end of the fiber reinforcing plate 500 is fixed to the opposite side of the guide bar 413, tension clamp 420 The guide bar 413 is fixed to the front and rear frame through the. The guide bar 413 allows the tension gripping zone 420 to move horizontally. Front and back frame and side frame are integrated by bolt or welding.

FIG. 23 is a cross-sectional view taken along line A-A of FIG. 22, which is a cross-sectional view of the tension device of FIG. 22 fixed to the concrete structure 700. The hydraulic cylinder piston rod 431 is connected through the lower portion of the tension gripping zone 420 and is fixed by the fastener 440, so that the tension gripping zone 420 moves forward and backward when the hydraulic cylinder 430 is operated. It is. The front part of the tension gripper 420 located on the front frame 410 side is processed with the tooth key 423 at an angle and shape corresponding to the tooth key 392 formed on the front of the tension ball 390 to increase the grip force. have.

FIG. 24 is a cross-sectional view taken along the line B-B of FIG. 22, and the tension device of FIG. The guide bar 413 is fixed to the front frame 410 and the rear frame 411 through the tension gripping zone 420.

FIG. 25 is a cross-sectional view taken along the line C-C of FIG. 22, wherein the tension device of FIG. 22 is fixed to the concrete structure 700. An insertion hole 421 through which the guide bar 413 is inserted and an insertion hole 422 through which the hydraulic cylinder piston rod 431 is inserted are processed in the tension gripper 420. Anchor bolt-A 124 is inserted into the anchor hole 704 of the concrete structure 700 by penetrating through the bolt insertion hole 114 processed in the side frame 412, and tightening the nut 122 to tension device Fix the 400 to the concrete structure 700.

FIG. 26 is a perspective view illustrating the tension gripping tool 420 of FIG. 22, wherein a tension ball groove 424 for inserting the tension ball 390 is formed, and a tension ball is formed at the front portion of the tension ball groove 424. A tooth key 423 having an angle and a shape corresponding to the tooth key 392 of 390 is formed, and a guide bar insertion hole 421 and a hydraulic cylinder piston rod insertion hole 422 are processed.

Fiber reinforcing plate using the first fixing device 100, the second fixing device 200, the third fixing device 300, the tension device 390 and the tension device 400 described above with reference to FIG. Introduce tension to the 500, the construction process to reinforce the concrete structure 700 in detail. Fig. 27A is a bottom view of the construction site, Fig. 27B shows the cross section A-A of Fig. 27A, and Fig. 27C shows the cross section B-B of Fig. 27A.

First, the third fixing unit 300 is installed at one end of the fiber reinforcing plate 500, and the tension hole 390 is installed at the opposite end thereof. [The third fixing unit 300 and the tension hole 390 installation process is described above with reference to Figures 12 to 15 and 18 to 21, respectively.]

Anchor hole 701 to insert the first anchorage 100 constituting the fixed anchoring portion 900 and the tension anchoring portion 901 to the reinforcement target concrete structure 700 and the anchorage hole 200 to insert the second anchorage 200 After processing 702, the anchor bolt A 120 is installed in the anchor hole 701, and the second anchorage 200 is installed in the anchor hole 702. Before inserting the second anchorage 200 into the anchor hole 702, the fiber reinforcement plate 500 having the third anchorage 300 and the tension hole 390 respectively installed at both ends of the anchoring portion 900 anchoring The third fixing unit 300 outside the hole 702, the tension hole 390 outside the anchor hole 702 of the tension fixing part 901 is positioned on the concrete surface and inserted. [Installation process of the second fixing unit 200 is described above with reference to FIGS. 6 to 11.]

When construction of the second fixing unit 200 is completed in the fixed fixing unit 900 and the tension fixing unit 901, the first fixing unit 100 constituting the fixed fixing unit 900 is constructed. After the first fixing unit 100 is inserted into the anchor bolt-A 120 installed in the anchor hole 701, the third fixing unit 300 constituting the fixed fixing unit 900 is connected to the second fixing unit 200. After pulling the fiber reinforcement plate 500 to be in close contact, the nut 122 is fastened to the anchor bolt-A 120 and fully tightened so that the fiber reinforcement plate 500 is in close contact with the concrete surface. The first fixing unit 100 is also installed to be in close contact with the second fixing unit 200. 4 and 5, the first fixing unit 100 is illustrated. The construction of the fixed fixing unit 900 is completed by the above process.

The anchor hole 704 is machined in the concrete structure 700 adjacent to the outer side of the tension fixing part 901, and the tension device 400 is installed using the anchor bolt-A 124 and the nut 122. Insert the tension sphere 390 installed at one end of the fiber reinforcement plate 500 into the tension gripper 420 of the tension device 400, and operates the hydraulic cylinder 430 to tension the fiber reinforcement plate 500. . When the target tension force is introduced, the first anchorage 100 constituting the tension fixing portion 901 is inserted into the anchor bolt-A 120 and the nut 122 is tightened to fully tighten the fiber reinforcement plate 500. It adheres to the surface. The first fixing unit 100 is also installed in close contact with the second fixing unit 200. [The tension device 400 is described in detail with reference to FIGS. 22 to 25.]

When the hydraulic cylinder 430 is operated in reverse, the tension is eliminated in the fiber reinforcing plate 500 spanning the tension device 400 at the second fixing unit 200 of the tension fixing unit 901. Fiber reinforcing plate 500 After cutting the end portion of the tension sphere 390, the third fixing body 310 shown in Fig. 13 or 15 is inserted into the fiber reinforcing plate 500. The process is completed by fully buffering and curing the thermosetting resin 610 through the injection hole 311 in a state in which the third fixing body 310 is in close contact with the second fixing unit 200. A hole 510 is processed and inserted into the fiber reinforcing plate portion arranged in the third fixing unit body 310 from above. In the case of using the third fixing unit body 310 illustrated in FIG. 15, the pressing plate 320 is further installed as shown in FIG. 14. In this case, the third fixing unit 300 constituting the fixed fixing unit 900 also has the configuration of FIG. 14. [The third fixing unit 300 installation process is described above with reference to Figures 12 to 15.] The construction is completed by the above process.

In the above process, the adhesive 600 may be applied to the fiber reinforcing plate 500 in contact with the concrete surface to improve integration with the concrete structure 700.

The present invention is used in a method of prestressing and reinforcing concrete structures using all plate-shaped reinforcement materials, such as unidirectional fibrous plates such as carbon fiber plates, fibrous meshes and fibrous composite plates of unidirectional fibers, and steel plates and fibrous composite sheets of unidirectional fibers.

The present invention configured as described above, by using a steel plate-shaped anchorage, steel U-shaped anchorage, steel and thermosetting resin anchors together to tension the fiber reinforcement plate to reinforce the concrete to concrete It is possible to install the anchorage with less damage, and the structure does not slip when the anchorage grips the fiber reinforcement plate where the tension is introduced, and the reinforcement can be easily adhered to the concrete surface to be reinforced. Provides prestressing reinforcement to maximize the performance of

According to the present invention, there is also a problem in that the weakness in the anchorage part, which is a disadvantage of the method of fixing the carbon fiber plate to the concrete structure, that is, the fiber reinforcing plate such as the carbon fiber plate as the reinforcing material is cracked and torn in the fixing part, thereby reducing the reinforcing effect. Provides free prestressing reinforcement.

In addition, in tensioning the fiber reinforcement sheet, a tension ball made of steel and thermosetting resin is installed at one end of the fiber reinforcement sheet, and the fiber reinforcement sheet is tensioned by using a tension device having a simple structure designed accordingly. As a result of the tension device, the carbon fiber plate breaks and tears that occur when the tension is solved, and the fiber reinforcement plate as a reinforcing material can be tensioned without maintaining a separate auxiliary device.

Figure 1 is a schematic diagram showing a structure of the reinforcement completed by introducing an external prestressing, using a fixed fixing part and a tension fixing part of the present invention, a fiber reinforcing plate.

Figure 2 is a view showing in detail the fixing fixture and the tension fixing portion installation portion of Figure 1;

3 is a bottom view of the fixing fixing part and the tension fixing part installing part of FIG.

Figure 4 is a perspective view showing the configuration when installing the first, second and third fasteners and the fiber reinforcing plate constituting the fixed fixing part and the tension fixing part of the present invention.

Figure 5 shows a first anchorage of the present invention.

6 is a perspective view of a second fixing unit of the present invention;

7 is a view showing the anchor bolt and the anchor constituting the second anchorage of FIG.

FIG. 8 is a view showing cross sections A-A and B-B in FIG. 3, with a second anchorage inserted; FIG.

FIG. 9 is a view showing the following process of FIG. 8, in which anchor bolt-B is fixed and anchor holes are sealed with a sealant. FIG.

FIG. 10 is a view illustrating a next process of FIG. 9, illustrating a second fixing unit in which a thermosetting resin is injected, and an injection nipple is removed to be completed.

FIG. 11 shows a cross section A-A in FIGS. 8 and 9;

12 is a perspective view and a cross-sectional view showing a third anchorage of the present invention.

FIG. 13 is a perspective view of the third fixing unit body of FIG. 12; FIG.

14 is a perspective view and a cross-sectional view showing another third anchorage of the present invention.

15 is a perspective view of another third fixing body and the pressing plate of FIG.

FIG. 16 is a diagram schematically illustrating a state in which external prestressing is introduced into a fiber reinforcing plate by using the first, second and third anchoring devices and the tensioning device of the present invention. FIG.

Figure 17 is a perspective view showing the configuration state of the first and second fixing fixture and the tension fixture constituting the tension fixing part of the present invention.

18 is a perspective view and a cross-sectional view showing a tension sphere of the present invention.

19 is a perspective view of the tension sphere body of FIG.

20 is a perspective view and a cross-sectional view showing another tension sphere of the present invention.

21 is a perspective view of another tension sphere body of FIG.

Figure 22 is a perspective view showing a fiber reinforcing plate tension device of the present invention.

FIG. 23 shows a cross section A-A of FIG. 22;

FIG. 24 is a sectional view B-B of FIG. 22;

FIG. 25 shows a section C-C in FIG. 22.

FIG. 26 is a perspective view of the tension wave strip of FIG. 22; FIG.

FIG. 27 is a detailed view showing a state in which external prestressing is introduced into a fiber reinforcing plate by using the first, second and third anchoring devices and the tensioning device of the present invention. FIG.

(Explanation of symbols for the main parts of the drawing)

100: first anchorage 110, 113, 114: bolt insertion opening

120, 124: anchor bolt-A 122: nut

130: groove 200: second anchorage

210: anchorage body 211: buried part

212: exposed portion 220: anchor bolt-B

221: bolt portion 222: anchoring portion

223: injection tube 224: injection nipple

225: anchor 226: anchor insertion groove

227 nut 228 anchoring groove

300: third anchorage 310: anchorage body

311: inlet 312: air outlet

313: fiber reinforced plate inlet 314: fiber reinforced plate outlet

320: pressing plate 321: bolt

322 nut 323 bottom

390: tension ball 391: tension ball body

392: tooth tooth 400: tension device

410: front frame 411: rear frame

412: side frame 413: guide bar

420: tension wave zone 421: guide bar insertion hole

422: cylinder piston rod insert 423: toothed key

424: tension ball groove 430: hydraulic cylinder

431 cylinder piston rod 440 fastener

500: fiber reinforcement plate 510: hole

600: adhesive 610: thermosetting resin

611: sealant 700: concrete structure

701, 702, 704: anchor hole 900: fixed fixing part

901: tension fixing unit

Claims (14)

In reinforcement of concrete structure, Both ends of the fiber reinforcing plate 500, the first anchorage 100 made of square plate-shaped steel, the second anchorage 200 made of c-shaped steel, the third anchorage made of a cuboid steel and thermosetting resin (300) In fixing to the concrete surface to be reinforced by the fixed fixing unit 900 and the tension fixing unit 901 consisting of a), the tension sphere 390 is installed on one end of the fiber reinforcement plate 500, the tension fixing unit 901 Prestressing reinforcement method of concrete structure to install the tension device 400 is mounted adjacent to the hydraulic cylinder adjacent to grip the tension sphere 390, the fiber reinforcement plate 500 by the hydraulic force to settle. The method of claim 1, wherein the second fixing unit 200; A steel-shaped anchorage body 210 having a cylindrical shape having two buried portions 211 and one hexahedral exposed portion 212 integrally formed therein; The buried portion 211 is embedded in concrete and the exposed portion 212 serves to support the third anchorage 300; The anchor bolt-B 220 is assembled through the center from the buried portion 211 to the exposed portion 212 of the upper portion; An anchoring part groove 228 in which the anchoring part 222 of the anchor bolt-B 220 can move up and down is formed in the center of the lower part of the buried part 211; A fixing device made of a c-shaped steel in which the anchor 225 is inserted into the anchor insertion groove 226 formed to penetrate from the groove 228 to the outer surface of the buried portion 211. The method of claim 2, wherein the anchor bolt-B (220) and the anchor (225); One end of the bolt portion 221 is connected to the anchoring portion 222 of the square pyramid shape, the narrow upper surface of the anchoring portion 222, the injection nipple 224 is connected to the opposite end of the bolt portion 221 A unitary structure in which a nut 227 is fitted to the bolt portion 221; The anchoring portion 222 and a part of the bolt portion 221 connected thereto are inserted into the fixing unit body 210, and the remaining bolt portion 221, the nut 227, and the injection nipple 224 portion are the fixing unit body 210. Anchor bolt having a structure exposed outside the upper surface of the exposed portion 212, the nut 227 is in contact with the upper surface of the exposed portion 212 to tighten or loosen, to move the anchoring portion 222 up and down- B 220; One surface of the anchor 225, which is inserted into the anchor insertion groove 226 of the anchoring body 210, the buried portion 211, moved by the anchor bolt-B 220, is formed at an angle of the inclined surface of the anchoring portion 222. An anchor 225 having a corresponding angle and abutting the inclined surface of the anchoring portion 222, the opposite side being an arc-shaped surface corresponding to the inner diameter of the anchor hole 702; Anchor bolts and anchors of the anchor bolt-B (220) by tightening the nut 227, the anchoring portion 222 is pulled out to push the anchor 225 and tightly fixed to the anchor hole (702) surface. The method of claim 3, wherein the anchor bolt-B (220); The injection bolt 224, the bolt portion 221, the anchor bolt 225 is processed through the injection pipe 223 for injecting resin through the anchoring portion 222 of the square pyramid shape. The method of claim 1, wherein the third fixing unit (300); Fiber reinforcing plate inlet 313 at the top front, fiber reinforcing plate outlet 314 at the bottom of the rear, one side of the air outlet 312, the bottom is formed of a rectangular box made of steel sheet formed with an inlet 311. 3 anchorage body 310; Fiber reinforcing plate 500 is inserted diagonally across the outlet 314 from the inlet 313, the end of the fiber reinforcing plate 500 is arranged to exit the outlet 314, wherein the third fixing body 310 Insert the fiber reinforcing plate 500 is arranged in a state in which a plurality of holes are processed; After the inlet 313 and the outlet 314 is sealed with a sealant 611, the inlet 311 is made of a steel material and a thermosetting resin made by completely filling and curing the thermosetting resin 610. In addition to the thermosetting resin fixing unit 300 of claim 5, one side of the pressing plate 320 made of steel on the upper and lower surfaces of the fiber reinforcing plate 500 exiting the fiber reinforcing plate outlet 314 of the fixing unit body 310 Arranged to be in close contact with the back of the fixing unit body 310, the bolt is inserted into the bolt insertion hole 113 is processed in the pressing plate portion located outside the fiber reinforcement plate 500 and fixed with a nut 322; The bottom portion 323 of the fixing unit body 310 is a fixing unit made of steel and a thermosetting resin having a thickness corresponding to the pressing plate thickness. The method of claim 1, wherein the first fixing unit (100); The groove 130 made of a plurality of straight grooves perpendicular to the tension direction and a straight groove forming a 45 degree angle with the straight grooves which acts as a shear key on the surface in contact with the fiber reinforcement plate 500 is A plurality of staples in the shape of a steel plate, which are processed in a staggered manner, and a plurality of bolt insertion holes 110 are machined in the longitudinal direction at the outer edge of the center where the fiber reinforcement plate 500 is placed. Anchor bolt-A (120) installed in the 701 is fixed by the nut 122, the fixing member for fixing the fiber reinforcement plate 500 in close contact with the concrete surface. According to claim 1, Tension sphere (390); Fiber reinforcing plate inlet 313 on the front top, fiber reinforcing plate outlet 314 at the bottom rear, air outlet 312 at the top of one side, the inlet 311 is formed at the bottom, tension device 400 in the front A box-shaped tension ball body 391 made of a steel plate on which a tooth key 392 corresponding to the tooth key 423 formed on the front surface of the tension gripping member 420 is formed; Fiber reinforcing plate 500 is inserted diagonally across the outlet 314 from the inlet 313, the end of the fiber reinforcing plate 500 is arranged to exit out of the outlet 314, at this time inside the fixing unit body 310 The fiber reinforcing plate 500 is arranged to be inserted into a state where a plurality of holes are processed; Sealing the inlet 313 and the outlet 314 with a sealant 611; Tension sphere made of a steel material and a thermosetting resin made by buffering and curing the thermosetting resin 610 with the injection hole (311). In addition to the tension ball 390 of claim 8, one side of the pressing plate 320 made of steel on the upper and lower surfaces of the fiber reinforcing plate 500 exiting out of the fiber reinforcing plate outlet 314 of the tension ball body (391) Arranged in close contact with the back of the tension ball body (391), inserting the bolt in the bolt insertion hole 113 is processed in the pressing plate portion located outside the fiber reinforcement plate 500 and fixed with a nut; The bottom part 323 of the tension ball body 391 is a tension ball that has a thickness corresponding to the pressing plate thickness. According to claim 1, Tension device (400); A side frame 412 of the L-shape, the hydraulic cylinder 430 and one end of the guide bar 413 on which the bolt insertion hole 114 for fixing the anchor bolt to the concrete structure 700 is processed, is fixed. ), A tension frame 410 for holding the tension frame 410 installed at one end of the front frame 410, one end of the fiber reinforcing plate 500 is fixed to the opposite side of the guide bar 413, tension clamp 420 The tension gripper 420, which is fixed to the front and rear frames to pass through the guide bar 413 and the rear frame 411, which allows the hydraulic cylinder 430 to move horizontally and horizontally, is fixed to the tension gripper. 420 is composed of a hydraulic cylinder 430 having a piston rod 431 connected thereto; The frames 410, 411, 412 are welded or bolted together; Tension device for tensioning the fiber reinforcing plate 500 by the hydraulic force. The tension gripping zone (420) in the above 10; A tension ball groove 424 having a shape corresponding to the tension ball appearance is formed, into which the tension ball 390 of claim 8 or 9 is inserted. A tooth grip 423 having an angle and a shape corresponding to the tooth key 392 of the 390 is formed, and the guide bar insertion hole 421 and the hydraulic cylinder piston rod insertion hole 422 are processed. Reinforcing the concrete structure using the above-mentioned 2 to 11; Making a third fixing device 300 at one end of the fiber reinforcing plate 500 and making a tension ball 390 at the opposite end thereof; Anchor holes 701 and 702 for installing the first fixing unit 100 and the second fixing unit 200 of the fixed fixing unit 900 and the tension fixing unit 901 to the concrete structure 700 to be reinforced are processed, and the anchor hole Inserting and installing the anchor bolt-A 120 at 701; The third anchoring hole 300 of the fiber reinforcing plate 500 outside the anchor hole 702 of the fixed fixing portion 900, the tension hole 390 outside the anchor hole 702 of the tension fixing portion 901 Placing the second fixing unit 200 in the anchor hole 702 so as to be positioned on the concrete surface; The nut 227 of the second fixing unit 200 is tightened to bring the anchor 225 into close contact with the inner surface of the anchor hole 702, and the inlet of the anchor hole 702 is sealed, and then the thermosetting resin is injected through the injection nipple 224. Fully filling the 610 in the anchor hole 702 and cutting the injection nipple 224 portion; After the first fixing unit 100 is inserted into the anchor bolt-A 120 of the fixing fixing unit 900, the fiber is formed so that the third fixing unit 300 of the fixing fixing unit 900 is in close contact with the second fixing unit 200. After pulling the reinforcement plate 500, fastening the nut 122 to the anchor bolt-A (120) and tightening the fiber reinforcement plate 500 in close contact with the concrete surface; Constructing the fixed fixing unit 900 by installing the first fixing unit 100 to be in close contact with the second fixing unit 200; After fixing the anchor hole 704 in the concrete portion outside the tension fixing part 901, and inserting the anchor bolt-A (124), insert the tension device 400 in the anchor bolt-A (124) and nut Fastening and fixing 122; Inserting the tension sphere 390 installed at one end of the fiber reinforcement plate 500 into the tension gripper 420 of the tension device 400, and operating the hydraulic cylinder 430 to tension the fiber reinforcement plate 500 step; After the target tension force is introduced, the first anchorage 100 constituting the tension fixing portion 901 is inserted into the anchor bolt-A 120 and the nut 122 is tightened to fully tighten the fiber reinforcement plate 500. Adhering to cotton; Fiber reinforcing plate 500 After cutting the end portion of the tension sphere 390, the fiber reinforcing plate 500 is inserted diagonally across the outlet 314 at the fiber reinforcing plate inlet 313 of the third fixing unit body 310. In the, the fiber reinforcing plate portion located in the third fixing unit body 310, the step of inserting a plurality of holes (510) in the processed state; The third fixing unit body 310 is in close contact with the second fixing unit 200, sealing the inlet 313 and the outlet 314, and then fully filled and cured the thermosetting resin 610 through the inlet 311 ; By tensioning the fiber reinforcing plate 500, including, the method of prestressing the concrete structure. The method of claim 12, wherein one surface of the pressing plate 320 is formed on the upper and lower surfaces of the fiber reinforcing plate 500, which exits to the outside of the third fixing unit 300 constituting the fixed fixing portion 900 and the tension fixing portion 901 Inserting the bolt 321 into the bolt insertion hole 113 of the upper and lower pressing plates 320 and fastening the nut 322 to be in close contact with the fixing body 310; By tensioning the fiber reinforcing plate 500 further comprises, prestressing the concrete structure. According to claim 12 and 13, Step of applying an adhesive 600 to the fiber reinforcing plate 500 in contact with the concrete surface and bonded to the concrete structure 700; By tensioning the fiber reinforcing plate 500 further comprises, prestressing the concrete structure.