KR200349979Y1 - Structure reinforcement apparatus using multi directional prestressing - Google Patents

Abstract

The present invention relates to a structure reinforcement device that can introduce a prestress using a tension material such as PS steel wire in the lower part of the structure, such as concrete beams, steel beams, slabs and the like. Structure reinforcement apparatus using multi-directional prestressing of the present invention is fastened in a direction in which two fixing members are spaced apart from each other in a section requiring reinforcement, and both ends of the PS steel wire and the PS steel wire wound on the fixing member correspond to each other. And a steel wire fixing member applying tension to the PS steel wire, and the fixing member is provided with a position fixing groove on an outer surface of the PS steel wire wound thereon.

Description

Structure reinforcement using multi-directional prestressing {STRUCTURE REINFORCEMENT APPARATUS USING MULTI DIRECTIONAL PRESTRESSING}

The present invention relates to a structure reinforcing device, and more specifically, to reinforce a structure in which a prestress can be introduced by using a tension material such as a PS steel wire in a lower part of a structure such as a concrete beam, a steel beam, a slab, or the like. Relates to a device.

Generally, the method of reinforcing a slab that has been warped or sag is to add a reinforcing steel bar by bonding a fiber sheet or steel plate to the lower surface while the slab is left in a drooped state, and to add a steel beam such as an H-beam to the bottom slab. There is a way. Both methods are satisfied with the expectation that the slab will not restore what is already sagging but will no longer be severely drooping.

Recently, a reinforcement method using prestressing (compression force) that can be used to recover a slab that has been broken and cracked to its original state by using a tension material such as a PC steel wire has been widely used. This reinforcement method is a method of attaching a PS steel wire fixing unit at both ends, tensioning and fixing the PS steel wire between them, and applying prestressing (compression force) to the lower part of the slab.

However, this reinforcement method has the following problems.

First, the reinforcement method using the existing tension material (PS steel wire) is difficult to construct each PS steel wire with the same tensile force, it is difficult to achieve a precise balance of the tension force of each PS steel wire by the displacement after construction. In particular, there is no device for fixing the winding position of the PS steel wire in the existing fixing unit to which the PS steel wire is wound, and there are many construction difficulties by using a member of high load.

Second, when installing the PS steel fixing unit to the structure, the failure of the structure due to the aging of the structure, or the lack of supporting strength in many cases could not apply enough stress to the structure. In particular, in the case of the slab member of the structure, there is a limit in transferring sufficient stress from the PS steel wire strut to the structure only by the bearing strength of the anchor bolt.

Third, in the fixed end where the PS steel is fixed, if the PS steel wire with high tension is fixed, if the construction safety problem or the stress of the main structure of the structure additionally occurs after construction, the fixed cone of the fixed end due to the intensive load transfer of the support part (Wedgecon) Destruction may occur.

Fourth, in case of reinforcing a long or wide range of repairing section, it is necessary to install several PS steel wires.It is difficult to secure uniform tensile force of each PS steel wire, and it may cause unbalanced tensile force due to deformation after construction. have.

The present invention is to solve such a conventional problem, the object is to provide a structure reinforcement apparatus using a new form of multi-directional prestressing can be provided in both directions by providing a continuous PS steel wire in both directions. have. Another object is to provide a structure reinforcement apparatus using a new type of multi-directional prestressing to prevent the loosening of the PS steel wire or the relaxation of the PS steel wire. Still another object is to provide a structure reinforcement apparatus using a new type of multi-directional prestressing, in which the PS steel wire can be stably wound on the fixing member. Still another object is to provide a structure reinforcement apparatus using a new type of multi-directional prestressing, in which a fixing member on which a PS steel wire is wound is stably installed in a structure, thereby mitigating breakdown of the structure and ensuring sufficient supporting strength.

1 is a view showing a structure reinforcing apparatus using multi-directional prestressing according to a first embodiment of the present invention;

2 is a cross-sectional view showing an installation state of the fixing member in the first embodiment of the present invention;

3 is a plan sectional view of the steel wire fixing member fixed to both ends of the PS steel wire in the first embodiment of the present invention.

4 is a view showing a slab bottom to which a structure reinforcement apparatus using multidirectional prestressing according to a second embodiment of the present invention is applied;

5 is a view showing a slab cross section to which a structure reinforcement apparatus using multidirectional prestressing according to a second embodiment of the present invention is applied;

6 is a plan view showing another construction state of the structure reinforcing device according to the second embodiment.

7 is a pressure plate installed to improve the tensile strength of the PS steel wire;

8 is a cross-sectional view of a construction state of the structure reinforcing device to which the pressing plate is applied;

9 and 10 are views for explaining a structure reinforcement apparatus using multi-directional pre-stressing according to a third embodiment of the present invention;

11 is a modification of the reinforcing device according to the third embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

110: ps steel wire

120: fixing member

130: fastening means

140: steel wire fixing member

Structure reinforcing apparatus using the multi-directional pre-stressing of the present invention to achieve the above technical problem is two fixing members are installed spaced apart from each other in the section that needs to be reinforced; PS steel wire wound around the fixing member; And a steel wire fixing member coupled to both ends of the PS steel wire in a direction corresponding to each other and applying tension to the PS steel wire; The fixing member may form a position fixing groove on the outer surface of the PS steel wire is wound.

According to an embodiment of the present invention, the steel wire fixing member has a first through-hole through which one end of the PS steel wire passes, and a second through-hole through which the other end of the PS steel wire passes through the first fastening portion and the second fastening. A body having a unit and a connection part connecting the first and second fastening parts integrally; Tapered in the direction in which the PS steel wires are respectively formed at the front end of the first through hole and the rear end of the second through hole and the front end of the first through hole and the rear end of the second through hole respectively. Gin wedge insertions; And a wedge cone installed at each of the wedge insertion holes and having an insertion hole into which the PS steel wire is fitted.

According to an embodiment of the present invention, the fixing member is a wheel-shaped plate having at least one through hole for fixing to the structure and the positioning groove is formed on the outer circumferential surface, or the front end portion of the semicircular plate, and the front end portion. The rear end portion of the rectangular plate extending from the front end and having the same width as the diameter may be made of a plate integrally.

According to an embodiment of the present invention, at least two position fixing grooves may be formed on the outer circumferential surface such that at least two PS steel wires are fitted at different heights.

According to an embodiment of the present invention, the structure reinforcement apparatus using the multi-directional prestressing is installed in the section in which the PS steel wire passes and presses the PS steel wire in a direction perpendicular to the tensile force of the PS steel wire to improve the tensile strength of the PS steel wire. It may further include a pressure plate (supporting).

According to an embodiment of the present invention, the pressing plate includes a fixing part fixed to the structure, a support part installed in a direction perpendicular to the fixing part; Two grooves in which the PS steel wire is positioned may be formed at the end of the support part.

Structure reinforcement apparatus using the multi-directional pre-stressing of the present invention to achieve the above technical problem is a first, second, third fixing member is installed spaced apart from each other in the section that needs to be reinforced; A first steel wire wound around the first and second fixing members; A second steel wire wound around the first and third fixing members; Each of the first and second steel wires may include a steel wire fixing member for fastening both ends of the PS steel wire in a direction corresponding to each other and applying tension to the PS steel wire.

According to an embodiment of the present invention, the first, second and third fixing members may have at least two position fixing grooves formed on an outer surface of the PS steel wire wound thereon.

For example, embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. These embodiments are provided to more completely describe the present invention to those skilled in the art. Accordingly, the shape of the elements in the drawings and the like are exaggerated to emphasize a clearer description.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 11. In addition, in the drawings, the same reference numerals are denoted together for components that perform the same function.

1 to 3 are diagrams for explaining a structure reinforcement apparatus using multi-directional pre-stressing according to the first embodiment of the present invention.

Structure reinforcement device 100 according to the first embodiment of the present invention is suitable when the section to be reinforced is short, one PS steel wire 110 and two fixation (fixation) that the PS steel wire 110 is wound A member 120, a fastening means 130 for fixing the fixing member 120 to the slab, and a steel wire fixing member 140 for fixing the PS steel wire.

The fixing member 120 is installed spaced apart from each other with a reinforcing section of the slab (structure) that needs to be reinforced. The fixing member 120 is installed on the bottom surface of the slab 10 by a fastening means 130 made of a through-type fixing bolt 132 and a nut 134 penetrated through the slab 10. As such, the reinforcement device of the present invention is fixed to the through-type fixing bolt 132 installed through the slab 10 is fixed to the fixing member 120, it is possible to prevent the phenomenon of destruction due to the aging of the slab, and particularly sufficient support It is possible to secure the history.

Looking at the fixing member 120 in detail, the fixing member 120 is made of a wheel-shaped plate 122, one position fixing groove 124 is wound around the outer surface of the plate 122, the PS steel wire 110 ) Is formed. In addition, a through hole 126 into which the through fixing bolt 132 is inserted is formed at the center of the plate 122.

The PS steel wire 110 is located in the position fixing groove 124 formed in the two fixing members 120, it is always fixed to the fixing member 120 at a constant height. On the other hand, both ends of the PS steel wire 110 is fixed to the steel wire fixing member 140. The steel wire fixing member 140 is fastened in a direction in which both ends of the PS steel wire 110 correspond to each other and applies tension to the PS steel wire. As shown in FIG. 3, the steel wire fixing member 140 includes a body 142 and a wedge cone 148. The body 142 has a first fastening portion formed in parallel with the first through hole 143a through which one end of the PS steel wire 110 passes, and the second through hole 143b through which the other end of the PS steel wire passes through. 142a and the second fastening portion 142b and the connecting portion 14c connecting the first and second fastening portions 142a and 142b are integrally formed. The front end of the first through hole 143a and the rear end of the second through hole 143b of the first fastening part 142a and the front end and the second end of the first through hole 142a of the second fastening part 142b. Wedge insertion holes 146 are formed at the rear ends of the through holes 143b, respectively. The wedge insertion holes 146 are processed to be tapered in the direction in which the PS steel wires are respectively pulled so that the wedge cone 148 having a tapered shape can be fixed to the inner circumferential surface thereof. The wedge cone 148 is installed. The wedge cone 148 has an insertion hole into which the PS steel wire 110 is fitted. The wedge cone 148 is a multi-stranded, wedge-shaped, high-strength tapered cone that forms a spiral on its inner circumferential surface so that the spiral penetrates the PS steel wire and is fixed.

As such, the PS steel wire can be fixed to the two wedge cones 148 at both ends, thereby preventing the PS steel wire from loosening or the reflexing of the PS steel wire, and can strongly fix the high-strength PS steel wire. Deformation can be minimized even under stress. For reference, FIG. 3 is a plan view of the steel wire fixing member 140 fixed at both ends of the PS steel wire 110 in detail.

4 and 5 are views for explaining a structure reinforcement apparatus using multi-directional pre-stressing according to a second embodiment of the present invention.

The structure reinforcing device 200 according to the second embodiment is suitable for a case in which a plurality of PS steel wires are to be continuously installed due to a long section to be reinforced, two PS steel wires 212 and 214, and two PS steel wires 212 and 214. The first, second, and third fixing members 220a, 220b, and 220c are wound and installed continuously, and fastening means 230 and steel wire fixing members 240 having the same function as described above.

The biggest feature of the present embodiment is that the first, second and third fixing members 220a, 220b and 220c have two position fixing grooves on the outer circumferential surface thereof so that the two PS steel wires 212 and 214 can be installed in both directions (different directions). 224a and 224b are formed. As a result, the first steel wire 212 and the second steel wire 214 is stably fixed to the first fixing member 220a without departure or flow at different heights.

As shown in FIG. 4, the first steel wire 212 is wound around the first fixing member 220a and the second fixing member 220b, and the second steel wire 214 is connected to the first fixing member 220a. It is wound around the third fixing member 220c, respectively. Thus, the reinforcing device can provide a uniform tensile force in both directions (direction of the second fixing member and the direction of the third fixing member) around the first fixing member 220a.

Figure 6 shows a structure reinforcing device 200 constructed by varying the arrangement of the fixing member in the second embodiment of the present invention.

4 and 5, the construction structure of the reinforcement device using two PS steel wire is just one example, and in order to construct a wide range of reinforcement sections as shown in Figure 6, many fixing members 220 are installed and The plurality of PS steel wires 210 may be connected to the fixing members 220 so that a plurality of PS steel wires 210 may be continuously and partially crossed. Reference numerals 230 and 240 are the fastening means and the wire fixing member having the same function as the fastening means 130 and the steel wire fixing member 140 shown in FIG.

On the other hand, Figure 7 is shown the pressing plate is installed to improve the tensile force of the loosened PS steel wire, Figure 8 is a construction state in which the pressing plate is additionally installed in the structure reinforcement of Figure 5 is shown.

Referring to FIGS. 7 and 8, the pressure plate 250 presses (supports) the PS steel wire in a direction perpendicular to the tensile force of the PS steel wire to improve the tensile force of the PS steel wire 210. It is installed in the section. The pressing plate 250 is composed of a fixing part (base; 252) fixed to the structure and a support part 254 installed in a direction perpendicular to the fixing part 252, the pressing plate 250 is an iron plate Was welded to form T to reduce the weight. The fixing part 252 has a hole 253 for installing the pressing plate 250 in the structure, the fastening member such as a through-type fixing bolt is inserted into the hole 253 to be installed in the structure. In particular, the pressing plate 250 has two grooves 256 in which the PS steel wire is positioned at the end of the support portion 254, which not only stably supports the PS steel wire but also maintains the space between the PS steel wires. Can also be obtained.

9 and 10 relate to a structure reinforcement apparatus using multi-directional prestressing according to the third embodiment, the reinforcement device of the third embodiment is a device suitable for structures such as concrete beams rather than slabs.

9 and 10 is a PS steel wire 310 having the same configuration and function as the reinforcement device 100 according to the first embodiment shown in Figure 1, the fixing member 320 ), A plurality of anchor bolts 330, steel wire fixing member 340 and the pressing plate 350 described in FIG. 7, and the description thereof will be described in detail in the first and second embodiments Since the present embodiment will be omitted. However, in the present embodiment, the fixing member 320 is directly fixed to the bottom surface of the concrete beam 20 by using a plurality of anchor bolts 330. For this purpose, the fixing member 320 is provided near nine centers. Bolt insertion holes 328 are formed. In addition, the fixing member 320 is formed in a plate 322 of a semi-circular plate, the plate 322 has a width equal to the diameter of the front end portion (322a) and the front end portion (322a) of the semicircle The rear end portion 322b of the square plate extending from the front end portion is integrally formed, and the position fixing groove 324 is formed on both circumferential surfaces of the front end portion 322a and both side surfaces of the rear end portion 322b. The fixing member 320 of the semi-circle plate can be usefully used to install the PS steel wire in only one direction.

On the other hand, when the section to be reinforced to the structure such as the concrete beam 20 is long to install a plurality of PS steel wire continuously, a reinforcing device having a disk-shaped fixing member 320 'is used, such a disk-shaped An example in which the fixing member 320 'is constructed is shown in FIG.

The reinforcement device 300 ′ shown in FIG. 11 is modified only in the fixing member in the third embodiment, and is suitable for reinforcing a structure such as a concrete beam 20, and also suitable for installing several PS steel wires continuously. will be. The reinforcement device 300 ′ includes a fixing member 320 ′, a plurality of anchor bolts 330, a steel wire fixing member 340 having the same configuration and function as the reinforcement device according to the third embodiment shown in FIG. 9, and The pressure plate 350 described above with reference to FIG. 7, and the description thereof will be omitted in the present embodiment because it has been described in detail above.

However, in the present embodiment, the fixing member 320 'is formed with nine bolt insertion holes 328 near the center, and the shape of the fixing member 320' is such that the PS steel wire can be wound in any direction. It consists of a disk-shaped plate 322 ', which is characterized by the fact.

On the other hand, the reinforcement device of the present invention may have some differences in the fastening member to install the fixing member according to whether the object to be reinforced is a slab or concrete beam or steel structure.

In the present invention, the PC steel wire is used as the tension material, but this is only one example. Instead of the PC wire, the tensile strength is excellent and the risk of relaxation and corrosion that decreases in tensile strength as time passes after prestress is introduced. Plates or rods of less carbon fiber or glass fiber materials may be used.

On the other hand, the present invention is a reinforcement device made of the above configuration can be variously modified and can take various forms. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the above description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to do.

In the above, the configuration and operation of the reinforcing device according to the present invention is shown in accordance with the above description and drawings, but this is merely an example, and various changes and modifications are possible without departing from the technical spirit of the present invention. to be.

When the present invention is applied, the reinforcing device of the present invention can be fixed to the anchor bolt installed through the slab, thereby preventing the destruction caused by the aging of the slab, and in particular can ensure sufficient bearing strength There is an advantage.

In addition, the reinforcement device of the present invention has the advantage that the PS steel wire is located in the position fixing groove formed in the two fixing members, it is always fixed to the fixing member at a constant height.

In addition, the reinforcement device of the present invention can improve the tensile force of the loosened PS steel wire by installing a pressure plate.

In addition, the reinforcing device of the present invention can provide a uniform tensile force in a variety of directions in a wide range of reinforcing sections by connecting a plurality of PS steel wires to the plurality of fixing members in a continuous and partly intersecting.

In addition, the reinforcement device of the present invention can prevent the loosening of the PS steel wire or the relaxation of the PS steel wire by double fixing both ends of the PS steel wire.

Claims (5)

In the reinforcement of the structure: First, second and third fixing members spaced apart from each other in a section requiring reinforcement; A first steel wire wound around the first and second fixing members; A second steel wire wound around the first and third fixing members; And a steel wire fixing member installed on the first and second steel wires to fasten both ends of the steel wires in a corresponding direction to each other and to apply tension to the steel wires. A structure reinforcement apparatus using multidirectional prestressing, characterized in that uniform tension is provided in both directions from the first fixing member to the third fixing member. The method of claim 1, The first, second, third fixing member At least two position fixing grooves are formed on the outer surface on which the first and second steel wires are wound, so that the first and second steel wires are stably fixed at different heights. The method of claim 1, The steel wire fixing member A body consisting of a front end, a rear end, and a connecting part connecting the first and second through-holes parallel to both ends of the first and second steel wires; The front end of the first through hole and the rear end of the second through hole and the rear end of the first through hole and the second through hole respectively formed in the tapered direction in which the first and second steel wires are pulled, respectively. Wedge insertion holes; And a wedge cone installed in each of the wedge insertion holes and having an insertion hole into which the first and second steel wires are inserted. The method of claim 1, The first, second, third fixing member Structure reinforcement apparatus using multi-directional prestressing, characterized in that it comprises a wheel-shaped plate having at least one through hole for fixing to the structure and the positioning groove is formed on the outer peripheral surface. The method of claim 1, Structure reinforcement device using the multi-directional prestressing The pressing is installed in the section in which the first and second steel wires pass and presses (supports) the first and second steel wires in a direction perpendicular to the tensile force of the first and second steel wires to improve the tensile force of the first and second steel wires. Including further plates; The pressing plate is fixed to the structure, A support part installed in a direction perpendicular to the fixing part; Structure reinforcement apparatus using multi-directional pre-stressing, characterized in that the groove is formed at the end of the support portion is the first and second steel wires.