KR20140028835A

KR20140028835A - Reinforcing apparatus and method of beam using jack

Info

Publication number: KR20140028835A
Application number: KR1020120096029A
Authority: KR
Inventors: 전호건
Original assignee: 명보산공 주식회사; 전호건
Priority date: 2012-08-31
Filing date: 2012-08-31
Publication date: 2014-03-10

Abstract

In the present invention, a pair of anchorages 10 are spaced apart in the longitudinal direction and are coupled to the lower surface of the beam 100, respectively; A tension member (30) disposed at the lower portion of the beam (100) in a longitudinal direction and fixed at both ends to the pair of anchorages (10) in a tensioned state by prestressing; And between the lower surface of the beam 100 and the tension member 30 in a state of being fixed to the lower surface of the beam 100 at a position between the pair of anchorages 10 so as to vertically tension the tension member 30. And a tension reinforcing device including a stretchable length adjustable jack 20 provided with a metering rod 27 and a scale 28 for pushing downwards and visually checking the stretchable and stretched length. Reinforcement of the rigidity of the beam 100 by causing tension of the prestressing to be applied to the beam 100; When the tension force applied to the beam 100 by the tension member 30 should be further increased, the entire length of the stretchable length adjustable jack 20 is checked while visually checking the metering rod 27 and the scale 28. By elongating the tension member 30 further down to extend it, the tension member 30 is further prestressed so that an additional tension force acts on the beam 100.

Description

Beam tension reinforcement device using telescopic length adjustable jack and reinforcing apparatus and method of beam using jack}

The present invention relates to a beam reinforcing device for reinforcing the rigidity of the beam by placing the tension member in the lower portion of the beam and to tension the beam using the same, in particular a beam tensioning beam in a state where both ends are fixed (beam Disposed on the lower side of the beam, and between the lower surface of the beam and the tension member, a telescopic length adjustable jack having a configuration capable of adjusting the telescopic length while checking the length of the telescopic length being easily increased or decreased with the naked eye, It relates to a tension reinforcement device and a tension reinforcement method of the beam to adjust the degree of tension of the tension material by stretching or contracting, so as to easily adjust the degree of reinforcement of the beam by the tension material as necessary.

In order to increase the stiffness such as bending stiffness and shear stiffness of beams used as bridge girders and horizontal beams of buildings, tension members such as strands and steel bars are placed under the beams and prestress is applied to the tension members to introduce tension to the beams. The way to do it is suggested. Republic of Korea Patent No. 10-0530024 discloses an example of the prior art for reinforcing beam stiffness through the arrangement of the tension material as described above.

After applying tension to the beam by applying prestress to the tension member, it is necessary to further increase the tension by the tension member (e.g., loss of prestress over time or greater beam stiffness is required In the prior art, the tension member tension jack was to be installed in the longitudinal direction (the beam length direction) at the lower surface of the beam on which the tension member is fixed. However, since the beam is generally located at a high position from the ground, there is a problem in that dangerous and difficult work must be performed at high altitude in order to install the tension jack for pulling the tension member in the longitudinal direction on the bottom of the beam as in the prior art. In particular, the heavy hydraulic horizontal tension jack must be lifted up to the bottom of the beam, so a separate lifting equipment such as a crane must be used. Accordingly, in the case of a bridge, the lifting equipment must infiltrate the space below the beam. If the lower side is a road, inconvenience caused by traffic flow disturbance occurs.

See Republic of Korea Patent Publication No. 10-0530024 (announced on November 22, 2005).

The present invention was developed in order to solve the problems of the prior art as described above, specifically, the tension member is placed in the lower portion of the beam in a state where both ends are fixed and prestressing the tension member (reinforcement by introducing a tension force to the beam, When it is necessary to further increase the tension caused by the tensioning material, it is not necessary to lift the heavy extra equipment (horizontal hydraulic jack for prestressing) for the prestressing of the tensioning material to the lower part of the beam. It is an object to provide a technique that can be prestressed, thus minimizing dangerous and difficult work at high altitudes and minimizing blockage of space below the beam.

In addition, the present invention, in further prestressing the tension material as described above, it is an object to provide a technique that allows the naked eye to easily determine the degree of prestressing, precisely control the prestressing of the tension material.

In order to achieve the above object, in the present invention, a pair of anchorages are arranged spaced apart in the longitudinal direction, each coupled to the lower surface of the beam; A tension member disposed in the lower portion of the beam in the longitudinal direction and fixed at both ends to the pair of anchorages in a tensioned state by prestressing; And disposed between the lower surface of the beam and the tension member in a state fixed to the lower surface of the beam at a position between the pair of anchorages to push the tension member vertically downward, and visually confirm the stretchable and stretched length. A tension reinforcement device including a retractable length adjustable jack provided with a reading rod and a scale, and a tension force by prestressing of the tension material is applied to the beam to reinforce the rigidity of the beam; When it is necessary to further increase the tension applied to the beam by the tension member, the tension member is added by pushing the tension member further downward by extending the total length of the telescopic length adjustable jack to be longer while visually checking the metering rod and the scale. A method of tension reinforcement of a beam is provided, which is prestressed so that an additional tension force acts on the beam.

According to the present invention, the operator can adjust while visually confirming the elongated length of the stretchable length-adjustable jack through the metering rod and scale, and thus it is possible to precisely control the degree of introduction of additional tension by additional prestressing of the tension material. The effect is exerted.

In addition, in the present invention, when it is necessary to further increase the tension force on the beam, even without lifting a heavy horizontal hydraulic jack for prestressing the tension member to the lower part of the beam, it is desired simply and quickly with a simple tool that can turn the rotary knob This allows for more prestressing, thus minimizing the performance of dangerous and difficult tasks at high altitudes, allowing for the rapid completion of high altitude operations, as well as the use of cranes for lifting heavy horizontal hydraulic jacks. The effect of being able to minimize the blockage of the space and thereby the inconvenience.

1 is a schematic side view showing a state in which the tension reinforcing device according to the present invention is installed under the beam of the bridge.
FIG. 2 is a schematic perspective view of a circle A portion of FIG. 1.
3 is a schematic perspective view of a circle B portion of FIG. 1.
4 and 5 are schematic perspective views of the tension reinforcing device according to the present invention, respectively.
FIG. 6 is a schematic side view corresponding to FIG. 1 showing a state in which a tensioning force is further introduced into a beam by stretching a stretchable length adjustable jack. FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby. In particular, the following description illustrates that the tension reinforcing device according to the present invention is installed on a steel beam having a I-shaped cross-section, the subject to which the tension reinforcing device and the tension reinforcing method of the present invention is applied. It is not limited to the shaped steel beams, but includes all types of steel beams, concrete beams and composite beams as well as slab-shaped structures. Therefore, the following "beam" is to be understood to include all of the various types of steel beams, concrete beams, slabs, etc. as described above.

FIG. 1 is a side view of a schematic transverse direction (orthogonal direction) showing a state in which a tension reinforcing device according to the present invention is installed below a beam 100 of a bridge, and FIG. 2 schematically shows a circle A portion of FIG. 1. A perspective view is shown, and FIG. 3 shows a schematic perspective view of the circle B portion of FIG. 1. 4 and 5 are respectively a schematic perspective view showing the stretched length adjustable jack 20 used in the tension reinforcement device of the present invention in different stretched lengths. FIG. 6 is a side view corresponding to FIG. 1, which is a schematic side view illustrating a state in which a tension force 30 is further prestressed by extending the stretchable length adjustable jack 20 to further introduce a tension force to the beam 100.

As shown in the figure, the tension reinforcing device of the present invention is a pair of anchorages 10 which are spaced apart in the longitudinal direction (or axial direction) and are respectively coupled to the lower surface (specifically the lower flange) of the beam 100. And a tension member 30 disposed at the lower portion of the beam 100 in the longitudinal direction and fixed at both ends to the fixing unit 10 in a tensioned state by prestressing, and at a position between the pair of fixing units 10. It is placed between the lower surface of the beam 100 and the tension member 30 in a state fixed to the lower surface of the beam 100, pushing the tension member 30 vertically downward and visually confirm the stretchable and stretched length. It is configured to include a telescopic length adjustable jack (20) which is provided with a probe bar (27) and a scale (28).

Specifically, the pair of anchorages 10 are spaced apart from each other in the longitudinal direction and are integrally assembled and coupled to the lower surface of the beam 100, respectively, and are provided with a closing plate 11, and the closing plate ( 11, a through hole is formed. Therefore, both ends of the tension member 30 disposed in the lower direction of the beam 100 in the longitudinal direction are respectively fixed to the closing plate 11 in the state passing through the through-hole formed in the closing plate 11 of the fixing unit 10. . In this case, the plurality of tension members 30 may be arranged side by side in the lateral direction.

As shown in Figure 4 and 5, the stretchable length adjustable jack 20 according to the present invention, the upper coupling plate 21 is assembled to the lower portion of the beam 100, and the upper coupling plate 21 and A cylindrical upper housing 22 having a hollow body and a cylindrical member, the upper part of which is screwed into the hollow of the upper housing 22 and is inserted into the rotary knob 230 and is provided with a rotation. The main body 23, the lower portion of the cylindrical housing having a hollow so that the lower portion of the rotating body 23 is screwed into the insertion, and is provided on the lower surface of the lower housing 24 and the tension member 30 and It is configured to include a lower support plate 25 to be in contact. The lower support plate 25 is preferably provided with a guide member 250 in contact with the tension member 30 so that the tension member 30 does not leave the lower support plate 25 when the tension member 30 is pushed down. In the embodiment shown in the drawing, the guide member 250 has a configuration in which the tension member 30 penetrates as a pipe-shaped member, but is not limited thereto and has a shape such that the tension member 30 does not move laterally. If it is, the guide member 250 may be formed in various forms such as an open form by cutting the pipe-like member.

On the other hand, the telescopic length adjustable jack 20 of the present invention is further provided with a metering rod 27 and a scale 28 so that the change in the telescopic length can be easily read with the naked eye. Specifically, the scale 28 may be formed on any one or both of the upper housing 22 or the lower housing 24, the reading rod 31 is one end is coupled to the rotary knob 230 and the other end is It is provided to point to the scale (28).

In the elastic length adjustable jack 20 of the present invention, when the operator rotates the rotary knob 230, the main body 23 rotates accordingly, and the upper part is screwed to both ends of the main body 23 accordingly. The housing 22 and the lower housing 24 move closer to each other or move away from each other according to the rotation direction of the rotating body 23. That is, the length of the stretchable length adjustable jack 20 is stretched by the rotation of the rotating body 23. At this time, the metering rod 31 is coupled to the rotary knob 230, and the other end of the metering rod 31 points to the scale 28, the operator stretches through the metering rod 31 and the scale 28 Since the rotation knob 230 is rotated while easily grasping the entire length of the length adjustable jack 20 with the naked eye, it is possible to precisely adjust the stretch length of the stretchable length adjustable jack 20.

The elastic length adjustable jack 20 of the present invention constructed and operated as described above is fixed to the lower surface of the beam 100 at a position between the pair of anchorages 10 in the lower portion of the beam 100. It is disposed between the face and the tension member 30 to push the tension member 30 vertically downward. In the embodiment shown in the figure is shown that one stretch length adjustable jack 20 is installed in the middle point between a pair of anchorages 10, the stretch length adjustable jack 20 is to be provided in plurality Can be.

The upper coupling plate 21 of the stretchable length adjustable jack 20 is assembled to the lower surface (lower flange) of the beam 100 so that the lower support plate 25 faces downward in the state where the lower support plate 25 faces downward. The tension member 30 is in contact with each other. That is, the tension member 30 is inserted into the guide member 250 provided in the lower support plate 25. In this state, when the stretchable length adjustable jack 20 is further extended, the lower support plate 25 pushes the tension member 30 downward, while the tension member 30 is prestressed while the tension force is lowered in the beam 100. Is introduced.

Of course, when installing the tension reinforcing device of the present invention for the first time in the state in which the tension member 30 spans the lower support plate 25 as described above, both ends of the tension member 30 in the through-hole of the closing plate 11, By pulling the one end of the tension member 30 with the available horizontal hydraulic jack and prestressing, the tension may be introduced into the lower portion of the beam 100.

However, if there is a need to further increase the tension applied to the beam 100 by the tension member 30, such as loss of prestress due to elapse of time, demand for additional rigidity of the beam, etc. This approach further prestresses the tensioner. That is, while the tension reinforcing device of the present invention is installed between the lower surface of the beam 100 and the tension member 30, the operator rotates the rotary knob 230 while visually checking the metering rod 27 and the scale 28. When the stretched length adjustable jack 20 is extended so that the entire length is longer, the lower support plate 25 pushes the tension member 30 further downward, and thus the tension member 30 is further prestressed. Additional tension is to act on the beam (100). As described above, in the present invention, the operator checks the elongation of the stretchable length-adjustable jack 20 while visually checking the elongated length of the stretchable-length adjustable jack 20 through the meter reading rod 27 and the scale 28. It can be adjusted. Therefore, it is possible to precisely control the degree of introduction of the additional tension force by the additional prestressing of the tension material (30).

In addition, in the present invention, when it is necessary to further increase the tension force on the beam 100, even without lifting a heavy horizontal hydraulic jack for the prestressing of the tension material to the lower portion of the beam 100, a simple to turn the rotary knob 230 The tool alone allows you to prestress additional tension as easily and quickly as you want. Therefore, it is not necessary to perform dangerous and difficult work at high altitude, and it is possible to finish high altitude work quickly and to minimize space blocking under the beam caused by the use of a crane for lifting a heavy horizontal hydraulic jack.

1: tension reinforcement
10: anchorage
20: telescopic adjustable jack
30: Tension material

Claims

A pair of anchorages 10 disposed longitudinally spaced apart from each other and coupled to the lower surface of the beam 100;
A tension member (30) disposed at the lower portion of the beam (100) in a longitudinal direction and fixed at both ends to the pair of anchorages (10) in a tensioned state by prestressing; And
The tension member 30 is vertically downwardly disposed between the lower surface of the beam 100 and the tension member 30 in a state fixed to the lower surface of the beam 100 at a position between the pair of anchorages 10. It comprises a telescopic length adjustable jack 20 is provided with a metering rod (27) and graduations (28) that can be pushed to the naked eye to check the stretchable and stretched length,
Reinforcing the rigidity of the beam (100) by applying tension to the beam (100) by prestressing of the tension member (30);
When the tension force applied to the beam 100 by the tension member 30 should be further increased, the entire length of the stretchable length adjustable jack 20 is checked while visually checking the metering rod 27 and the scale 28. The tension reinforcement device of the beam, characterized in that the tension member 30 is further prestressed so that an additional tension force acts on the beam 100 by elongating the tension member 30 further downward.

A pair of anchorages 10 are arranged to be coupled to the lower surface of the beam 100 in a longitudinally spaced state;
A tension member 30 is disposed in the longitudinal direction of the lower portion of the beam 100 and prestressed to fix both ends to the pair of anchorages 10 in a tensioned state;
The telescopic length-adjustable jack 20 provided with the metering rod 27 and the scale 28 which can visually confirm the stretchable and stretched length, the beam at the position between the pair of anchorages 10 Inserted between the lower surface of the (100) and the tension member 30 to extend the stretchable length adjustable jack 20 in the state fixed to the lower surface of the beam 100 to push the tension member 30 vertically downward. Reinforcing the rigidity of the beam (100) by applying tension to the beam (100) by prestressing the tension member (30);
When the tension force applied to the beam 100 by the tension member 30 should be further increased, the entire length of the stretchable length adjustable jack 20 is checked while visually checking the metering rod 27 and the scale 28. By stretching it further to push the tension member (30) further downwards, so that the tension member (30) is further prestressed so that an additional tension force acts on the beam (100).