KR100653629B1 - Jack apparatus for near surface mounted reinforcements - Google Patents

Abstract

A tension device for stretching a tension member placed on the inside of a concrete structure from the surface of the concrete structure is provided to extend the application range of a new reinforcement structure by applying a new reinforcement structure easily even if the end of a concrete structure like a concrete girder of a bridge is limited in space and to stretch a tension member on the surface of a concrete structure even if the tension member is located on the inside of the concrete surface. A tension device(10) for stretching a tension member placed on the inside of a concrete structure contains a base(12) fixed to the target surface of reinforcement(110) above a concave groove(101) of a concrete beam(100) using fixing members such as fixing anchors(14) and provided with an opening(16) to move a connecting member which connects a moving member and a clamping member, a moving member(22) installed on the base to move parallel to a tension member(102) inserted to the concave groove of the concrete beam, a shaft member(40) installed to one side of the moving member and moved freely via a through hole(61) of a finish plate(60) formed perpendicular to the tension member on the upper part of the base, a clamping member connected with the moving member using the connecting member and located to the end of the concave groove of the concrete beam to be connected strongly to the end of the tension member inserted to the concave groove, a pressure member(30) fixed to a support plate(62) which faces with the finish plate on the upper part of the base and pressurizing the moving member in the direction of an arrow, and a position fixing member(50) composed of a nut to couple with a screw thread formed on the surface of the shaft member to fix the location of the moving member.

Description

Jack Apparatus for Near Surface Mounted Reinforcements

1A to 1D are schematic views showing each step of constructing a reinforcing structure to reinforce a concrete beam as an example of a concrete structure,

Figure 2 is a perspective view showing a state in which the tension device is fixed to the concrete structure according to an embodiment of the present invention,

3 is a partial cross-sectional view taken along line III-III 'of FIG. 2,

Figure 4 is a perspective view showing a tension device according to another preferred embodiment of the present invention (in Figure 4 omitted a concrete structure for convenience of description).

<Explanation of symbols for main parts of the drawings>

10, 200 ... tension 12, 212 ... base

20, 220 ... clamping member 22, 222 ... moving member

30, 230 ... Pressure member 40, 240 ... Shaft member

50 position fixing member 60, 260 finish plate

62, 262 ... support plate 100 ... concrete beam

102 ... Tension

The present invention relates to a tension device of the tension material for reinforcing concrete structures to be installed in concrete structures, specifically, in the case of installing the tension material for the purpose of reinforcing the concrete structure and to tension the tension material, for reinforcement on the reinforcement target surface of the concrete structure The tension member is installed in parallel with the tension member to tension the tension member in the longitudinal direction of the tension member, thereby effectively tensioning the tension member even when the space at the end of the concrete structure is narrow and a conventional tension device cannot be installed. It relates to a tension device for the reinforcement of the concrete structure of the new structure that can be tensioned even on the surface.

The most common method of reinforcing concrete structures has been to reinforce the structure by tensioning the steel wire using a fixing member protruding from the outer surface of the concrete structure.

In this regard, the present inventors newly developed the following reinforcement structure. 1A to 1D show each step of implementing the newly developed reinforcement structure.

First, as shown in FIG. 1A, as an example of the concrete structure, the concave groove 101 is formed at a predetermined depth on the outer surface of the portion that needs to be reinforced in the concrete beam 100. After the concave groove 101 is formed, as shown in FIG. 1B, the tension member 102 is inserted into the concave groove 101, and the tension member 103 is installed using the tension device 103 installed at the end of the concrete beam 100. Strain 102). After tensioning the tension member 102, as shown in FIG. 1C, the filler 104 is filled in the concave groove 101 so that the tension member 102 is completely embedded in the filler 104. When the filler 104 is cured to a predetermined strength or more, the tension member 102 is dismantled from the tension device 103 to introduce a tension force to the concrete structure 100, and then, unnecessary portions of the tension member 102 are removed, as shown in FIG. 1D. You will complete the reinforcement as shown.

However, in implementing the new reinforcing structure, when there is not enough space at the end of the concrete structure, it is difficult to apply the reinforcing structure of the concrete structure as it is not possible to install a tension device at the end of the structure. For example, in the case of bridges, the spacing between the concrete molds is extremely narrow, so that tension devices cannot be installed between the concrete molds. Therefore, it is difficult to reinforce the concrete structure by applying the new reinforcement structure as described above.

The present invention, even if the space of the end of the concrete structure as described above is to be able to apply a new reinforcement structure is to ultimately to expand the scope of application of the new reinforcement structure.

To this end, in the present invention, specifically, in the reinforcement target surface of the concrete structure, not the end of the concrete structure, it is installed in parallel with the tension material so that the tension material can be tensioned even when the space of the end of the concrete structure, such as the concrete mold of the bridge is narrow It is possible to easily apply the new reinforcement structure of the present inventors, and further to provide a tension device of a new structure that allows the tension member to be easily tensioned from the surface of the concrete structure even when the tension member is located inside the concrete structure. The purpose.

An object of the present invention as described above, the tension device for tensioning the tension member for reinforcement of the concrete structure, the base fixed to the reinforcement target surface of the concrete structure above the end of the concave groove, and the tension member of the base A clamping member connected to an end, a movable member installed on the upper portion of the base to move in the direction of tensioning the tension member, the movable member connected to interlock with the clamping member through an opening formed in the base, and the tension member being tensioned. And a pressing member for urging the moving member to move in a direction, and a position fixing member for fixing the position when the moving member is moved, so as to be parallel to the reinforcing tension member on the reinforcement target surface of the concrete structure. To tension the tension member in the longitudinal direction of the tension member It is achieved by the tensioning device of the tension material for reinforcing concrete structures.

Here, the upper end of the base is provided with a closing plate perpendicular to the tension member, one side of the moving member may be formed to extend through the closing plate, the shaft member is formed along the outer periphery.

In addition, the pressing member is fixed to the support plate formed on the upper portion of the base to face each other with the closing plate can press the other side of the moving member, the nut is fastened to the end of the shaft member, the moving member and clamping The position of the member is fixed.

On the other hand, in another embodiment of the present invention, the support plate is fixed to the end of the shaft member protruding through the closing plate fixed by a fixing nut, the pressure member is provided on the outside of the closing plate, the support plate The pressing member may be pressed, and a moving nut may be fastened to the shaft member between the closing plate and the supporting plate to fix the positions of the moving member and the clamping member.

Hereinafter, with reference to the accompanying drawings will be described the configuration and effect of the present invention.

Figure 2 is a perspective view showing a state in which the tension device 10 according to a preferred embodiment of the present invention is installed on the concrete beam 100, an example of a concrete structure, Figure 3 is a line along line III-III 'of FIG. It is a figure which shows a partial cross section. In FIG. 2, one side wall 66 is partially cut and omitted to show the inside of the tension device 10. Hereinafter, a concave groove 101 is formed to a predetermined depth in the reinforcement target surface 110 of the concrete beam 100, that is, as shown in FIGS. 1A to 1D. In the groove 101, the structure of the tension device 10 according to the present invention will be described as an example of being used in a reinforcing structure for arranging a tension member 102 for applying a tension force. However, the reinforcing structure to which the tension device 10 of the present invention is applied is not limited thereto.

Referring to FIG. 2, the tension device 10 of the present invention includes a base 12 fixed to the reinforcement target surface 110 above the end of the concave groove 101 formed in the concrete beam 100. The base 12 is provided with various components described below, and is firmly fixed to the reinforcement target surface 110 by a fixing member such as the fixing anchor 14. An opening 16 is formed in the central portion of the base 12 such that the connecting member 24 connecting the moving member 22 and the clamping member 20 to be described later moves through the opening 16.

The moving member 22 is installed above the base 12 to be movable. Preferably, the movable member 22 is installed to be movable in parallel with the tension member 102 inserted into the concave groove 101 of the concrete beam 100. Specifically, the shaft member 40 extending by a predetermined length is installed on one side of the moving member 22.

The shaft member 40 is positioned to penetrate the finishing plate 60 formed perpendicular to the tension member 102 on the base 12. A screw thread is formed on the surface of the shaft member 40, and a position fixing member 50 made of a nut to be described later is fastened to the end of the shaft member 40 to fix the position of the movable member 22. This will be described in detail. On the other hand, since the thread is not formed in the through hole 61 of the closing plate 60, the shaft member 40 can move freely while passing through the through hole 61 of the closing plate 60. Accordingly, the moving member 22 is able to move parallel to the tension member 102 along a straight line by the shaft member 40.

The moving member 22 is connected to the clamping member 20 which is firmly connected to the end of the tension member 102, as shown in FIG. The clamping member 20 is located at the end of the recessed groove 101 formed in the concrete beam 100 at the bottom of the base 12, and is firmly connected to the end of the tension member 102 inserted into the recessed groove 101. do. In addition, the clamping member 20 is connected to the movable member 22 by the connecting member 24 penetrating through the opening 16 of the base 12 so as to interlock with the movable member 22. Therefore, when the moving member 22 moves in the direction of the arrow, the clamping member 20 also moves in conjunction, thereby tensioning the tension member 102.

On the other hand, the pressing member 30 is to press the moving member 22 to move in the upper portion of the base 12. 2 again, the pressing member 30 is fixed to the support plate 62 formed to face the closing plate 60 at the top of the base 12, and presses the other side of the moving member 22 to move the member ( 22 is pressed to move in the direction of the arrow. Therefore, by the drive of the pressing member 30, the moving member 22 is moved to the arrow direction. In this case, the clamping member 20 which cooperates with the movable member 22 also moves in the direction of the arrow, thereby tensioning the tension member 102 connected to the clamping member 20. As the pressing member 30, for example, a general hydraulic jack may be employed. Since many are already known in the art, a detailed description thereof will be omitted.

Meanwhile, referring again to FIG. 3, as described above, a screw thread 42 is formed on the surface of the shaft member 40, and a position fixing member 50 made of a nut is fastened to an end of the shaft member 40. . Specifically, the nut 50 is fastened along the shaft member 40 to contact the outer surface of the closing plate 60.

When the movable member 22 is moved in the direction of the arrow by the extension of the hydraulic jack 30, the shaft member 40 installed in the movable member 22 penetrates through the through-hole 61 of the closing plate 60 further. Protruding from the nut 50 is fastened to the shaft member 40 is separated from the closing plate (60). In this case, since the clamping member 20 and the movable member 22 are loaded in the direction opposite to the arrow by the tension member 102, the operator puts the nut 50 along the shaft member 40, the closing plate 60 It will move until it reaches. When the nut 50 is positioned in this way, the shaft member 40 and the movable member 22 cannot move due to the nut 50 even if the hydraulic jack 30 is removed, so that the tension member 102 maintains a tensioned state. Done.

By the tension device 10 having the above configuration, as described above, looking at the process of implementing the new reinforcement structure proposed by the present invention as follows.

First, the worker inserts the tension member 102 into the concave groove 101 formed in the reinforcement target surface 110 of the concrete beam 100, and firmly connects the clamping member 20 to the end of the tension member 102. After the clamping member 20 is connected to the tension member 102, the base 12 is fixed to the upper portion of the reinforcement target surface 110 by the fixing anchor 14. In this case, the base 120 is accurately fixed so that the clamping member 20 is located below the opening 16 formed in the base 12.

After fixing the base 12, the operator connects the clamping member 20 and the movable member 22 to each other, and install the hydraulic jack 30 between the movable member 22 and the support plate 62. Subsequently, the nut 50 is fastened to an end of the shaft member 40 which is installed at one side of the moving member 22 and passes through the closing plate 60. The worker moves until the nut 50 contacts the outer surface of the closing plate 60.

After tightening the nut 50, the operator extends the hydraulic jack 30 to press the movable member 22 to move the movable member 22 and the clamping member 20, thereby moving the tension member 102 to the desired degree. Tense After the tension member 102 is tensioned, the shaft member 40 is moved until the nut 50, which is separated from the closing plate 60, contacts the closing plate 60 by the movement of the shaft member 40 installed in the moving member 22. Move along 40). When the nut 50 is positioned in this way, the shaft member 40 and the movable member 22 cannot move due to the nut 50 even if the hydraulic jack 30 is removed, so that the tension member 102 maintains a tensioned state. Done.

After fixing the movable member 22 by the nut 50, the worker removes the hydraulic jack 30 and fills the recess 101 of the concrete beam 100 except the end where the clamping member 20 is located. It is filled with and cured to a predetermined strength. Subsequently, the tension device 10 of the present invention is removed, and the end of the concave groove 101 is finished with a filler to complete the reinforcement structure of the concrete beam 100.

On the other hand, the tension device of the present invention can be modified in its shape, Figure 4 shows a modified embodiment of the strain device of the present invention. In FIG. 4, the concrete beam in which the tension device 200 is installed is omitted for convenience of description.

In the embodiment shown in Figure 4 the support plate 262 is installed at the end of the shaft member 240 protruding through the closing plate 260, the fixing nut 270 is fastened to the distal end of the shaft member 240 Is fixed by. On the other hand, at least one hydraulic jack 230 is installed on the outside of the closing plate 260, the pressing plate 262 is pressed. In addition, the moving nut 250 is fastened to the shaft member 240 between the closing plate 260 and the support plate 262. The moving nut 250 is fastened to the shaft member 240 so as to contact the outer surface of the closing plate 260. Other configurations than the above-described configuration are the same as the embodiment shown in FIG.

Therefore, in this embodiment, when the hydraulic jack 230 is extended to press the support plate 262 in the direction of the arrow, the support plate 262 is fixed to the shaft member 240 by the fixing nut 270, so that the support plate Along with 262, the shaft member 240, the movable member 222, and the clamping member 240 move together to tension the tension member 102. In addition, when the shaft member 240 is further protruded through the closing plate 260 by the driving of the hydraulic jack 230, the moving nut 250 is moved again to contact the outer surface of the closing plate 250, the shaft Fixing the position of the member 240 and the moving member 222 is the same as the embodiment of FIG. In this case, even if the pressing member 230 is removed, the shaft member 240 is fixed by the fixing nut 250, so that the tension member 102 can be maintained in a tensioned state.

Looking at the operation of the present embodiment, first, the clamping member 220 at the end of the tension member 102 inserted in the concave groove (see Fig. 2, 101) of the concrete beam (see Fig. 2, 100) as in the embodiment of FIG. ) Is firmly connected, and then the clamping member 220 connected to the end of the tension member 102 is connected to the moving member 222. Subsequently, the moving nut 250 is fastened to the shaft member 240 provided at one side of the moving member 222 to move to contact the outer surface of the finish plate 260, and the support plate 262 is moved from the shaft member 240. It is installed at the end and fixed by the fixing nut 270. Subsequently, the hydraulic jack 230 is installed between the closing plate 260 and the support plate 262. When the hydraulic jack 230 is extended by applying hydraulic pressure, the supporting plate 262 is moved in the direction of the arrow in the outward direction of the finishing plate 260 accordingly. In this case, since the support plate 262 is fixed to the shaft member 240 by the fixing nut 270, the shaft member 240 moves together with the support plate 262. As the shaft member 240 moves, the movable member 222 and the clamping member 220 also move together to tension the tension member 102.

When the tension member 102 is tensioned to a predetermined degree, the moving nut 250 separated from the closing plate 260 by the movement of the shaft member 240 is again along the shaft member 240 so as to contact the outer surface of the closing plate 260. Move it. In this state, even if the hydraulic jack 230 is removed, the shaft member 240 and the movable member 222 cannot move due to the movable nut 250, and thus the tension member 102 maintains a tensioned state. Subsequently, the filling material is filled in the concave groove 101 of the concrete beam 100 except for the end where the clamping member 220 is located according to the reinforcement structure proposed by the present inventors, and is cured to a predetermined strength. Subsequently, the tension device 200 is removed and the end of the concave groove 101 is finished with a filler to complete the reinforcement structure of the concrete beam 100.

As described above, the tension device of the present invention is arranged in parallel with the tension material on the outer side of the reinforcement target surface of the concrete structure to tension the tension material. That is, as in the case of the bridge, even when the tension space of the concrete structure is narrow in the end space can not be tensioned at the end, using the tension device of the present invention can easily tension the tension material.

In particular, even when the tension member is located inside the concrete structure, the tension member can be easily tensioned on the surface of the concrete structure. Therefore, the advantage that the present inventors can easily apply the reinforcement structure as shown in Figures 1a to 1d newly proposed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the described embodiments, and free modifications and improvements can be made within the spirit and claims of the present invention.

Claims (4)

As a tension device for tensioning the tension member 102 for reinforcement of a concrete structure, Bases 12 and 212 fixed to the reinforcement target surface 110 of the concrete structure, Clamping members 20 and 220 connected to an end of the tension member 102 at the bottom of the base 12 and 212; The clamping members 20 and 220 are installed on the bases 12 and 212 so as to be movable in the direction of tensioning the tension member 102, and through the openings 16 formed in the bases 12 and 212. Moving members 22 and 222 connected to interlock with each other, Pressing members 30 and 230 for pressing the moving members 22 and 222 to move in the direction in which the tension member 102 is tense; When the moving member 30, 230 is moved, it comprises a position fixing member (50, 250) for fixing the position, thereby parallel to the tension member 102 on the reinforcement target surface of the concrete structure (100) Tension device of the tension member for reinforcing concrete structure, characterized in that to be installed to tension the tension member 102 in the longitudinal direction of the tension member (102). The method of claim 1, Closing plates 60 and 260 installed perpendicularly to the tension member 102 on the base 12 and 212, Concrete further comprising a shaft member (40, 240) extending to one side of the movable member (22, 222) to penetrate the closing plate (60, 260), the thread formed along the outer circumference Tension device for tension reinforcing structure. The method of claim 2, The pressing member 30 is fixed to the support plate 62 formed on the upper portion of the base 12 so as to face each other with the closing plate 60 to press the other side of the moving member 22, The position fixing member 50 is a tension device for reinforcing tension material for reinforcing concrete structure, characterized in that the nut is fastened to the end of the shaft member 40 protruding through the closing plate (60). The method of claim 2, Further comprising a support plate 262 is installed at the end of the shaft member 240 protruding through the closing plate 260, fixed by a fixing nut 270, The pressing member 230 is installed at least one outside of the closing plate 260 to press the support plate 262, The position fixing member 250 is tension device of the tension member for reinforcing the concrete structure, characterized in that consisting of a movable nut 250 is fastened to the shaft member 240 between the closing plate 260 and the support plate 262.

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