KR20150043914A - Deformation girder recovery method and device using section stiffiness and hydraulic jack - Google Patents

Abstract

The present invention provides a deformed girder recovery method and a device capable of removing a deformation in a girder using section stiffness of the other side of a girder mounted during bridge construction and a hydraulic jack. The method for recovering one or more deformed girders among n girders mounted during bridge construction comprises: a step for placing two spot girder holders on both spots of the n girders side-by-side in a perpendicular direction to a longitudinal direction, and installing spot support beams to allow the spot girder holders and the other undeformed girders to move as a single unit; a step for placing two center girder holders on centers of the n girders side-by-side in a perpendicular direction to a longitudinal direction, and installing center support beams to allow the center girder holders and the other undeformed girders to move as a single unit; and a step for, after recovering girders deformed by a lifting force of the hydraulic jack using a spot reaction section and the other girders′ stiffness, suppressing recovery of the deformation-removed girders by attaching a center vertical bar to the center girder holders; and a step for finally installing center horizontal beams and spot horizontal beams in the centers and spots between the n girders.

Description

TECHNICAL FIELD [0001] The present invention relates to a deformation girder recovery method and apparatus using stiffness and hydraulic jack,

The present invention relates to a method and apparatus for eliminating deformation of a girder which is mounted during a bridge construction, and more particularly to a method and apparatus for recovering a deformation of a girder by using a hydraulic jack, .

The top plate of the bridge is installed at the bridge and the bridge through the girder. In case of Prestressed Concrete Girder (PSC) girder, after installing a sheath tube inside the girder, the PSC tensioner is inserted into the sheath tube by disassembling the formwork, and then the PSC end of the PSC is fixed to the end of the PSC girder. And a method of producing a prestress by introducing the prestress into the PSC girder by cutting the tensioned PSC prestressing material in advance on the workbench by pouring concrete after placing the precast PSC prestressing material on the production stand and curing it after curing it . Such a PSC girder is usually formed as an I-shaped cross-section in the case of Korea.

When tension is introduced into the girder, transverse deformation or deformation of the back deformation occurs with time. In case of horizontal displacement due to deformation, less than 1/1000 of the length (L) of the girder is accepted as the tolerance. If the allowable error is within the tolerance, there is no problem in the construction. However, if the allowable error is exceeded, the construction failure occurs.

Therefore, if deformation occurs in the girder, a means and a method for recovering the deformation to the original state are required.

As a background of the present invention, there has been proposed a technique for increasing the rigidity to eliminate the deformation of the girder. Namely, an I-type steel girder is manufactured by forming an upper flange with a steel plate in the Korean Register Practical No. 20-0400014 (an I-shaped steel girder improved in flexural buckling stress) and welding the abdomen with a steel plate at the lower portion of the upper flange The steel plate for the lower flange is welded to the lower portion of the T-shaped steel while welding the steel plate for the lower flange with a constant tension to form the I-shaped steel And then the tensile force is generated on the upper and lower flanges, thereby improving the flexural buckling stress.

 However, the above background art has a problem that it can not be applied to a PSC girder which is strained by a tension member.

Korean Patent Laid-Open Publication No. 10-2007-0016511 (I-shaped steel girder with improved flexural buckling stress and method of manufacturing the same) Korean Registered Patent No. 10-0798702 (Composite Hybrid Girders)

An object of the present invention is to provide a method and an apparatus for recovering a deformation of a girder by using a hydraulic jack and a section rigidity of the other girder which is held during construction of a bridge.

According to the present invention, there is provided a method of recovering a deformation girder using a hydraulic jack,

A method for recovering a deformation in a girder of at least one of n girders which are held during a bridge construction,

The two branch fitter girder bridges are arranged in the longitudinal direction on both flank portions of n girders and a branch sprocket bracket for the integral behavior is installed between the flank girder fixed frame and the other girders in the order of restoration Wow;

Arranging two central girder fixing frames in a longitudinal direction in a central portion of n girders and installing a central supporting strut for integral behavior between the central girder fixing frame and the other girders not in the order of restoration;

The deformation of the girder deformed by the jacking force of the central hydraulic jack is removed by using the stiffness of the tie bar and the stiffness of the tie girder, and then the center vertical bar is joined to the center girder fixing frame to suppress the return of the deformation- A laying step;

And finally installing the center girder and the girder girder at the n girders at the central portion and the fulcrums between the n girders.

Further, the present invention further includes a step of simultaneously generating a reaction force from the fulcrum portion hydraulic jack at the fulcrum at the time of removing the deformation of the girder, and then bonding the corresponding one of the fulcrums to the fulcrum of the fulcrum portion.

In addition, when the deformed girder is located at the outermost side and has a concave shape inward, it further includes a step of installing a temporary strand after removing the deformation of the girder.

In addition, when the n girders are deformed and have a symmetrical shape outwardly convex, the center hydraulic jack is moved, and the deformation is removed while alternately selecting the girders in the order from the outside to the inside.

In addition, when the n girders are all deformed and have symmetrical shape concave to the inside, the deformation is removed by alternately selecting the girders alternately from the outside to the inside in the order of shifting the central hydraulic jack, Further comprising the step of installing a temporary strand.

In addition, when all of the n girders are deformed to form a curved shape in one direction, the deformation of the outermost girder which is farthest from the radius of curvature is shifted first and then the inner and outer girders are sequentially alternated So that the deformation is removed.

The method further includes the step of additionally providing a deformation preventing brace for preventing deformation to the center girder fixing frame and the fulcrum fixing portion after the deformation removing operation of the girder is completed.

Further, the center strut and the strut strut are characterized by having a screw jack at one end or both ends thereof.

Meanwhile, in the apparatus for recovering a deformation girder using a hydraulic jack and a section rigidity according to the present invention,

An apparatus for restoring a deformation in at least one of n elevators mounted on alternating and pier angles,

a pair of center fixing frames installed so as to surround a central portion of the n girders at right angles to the longitudinal direction;

A center strut which is installed so that the central girder fixing frame and the n girders act integrally;

A center hydraulic jack which is supported by a reaction end on one side of the center fixed frame and the other end of which is deformed and is supported by an action end to remove deformation of the girder by hydraulic pressure;

N central vertical sections fixed to the fixed frame and restraining deformation of the girders;

a fulcrum girder fixing frame installed to surround both of the fulcrums of the n girders in the longitudinal direction;

And a sprung branch which is installed so that the fixed spigot girder and the n girders act integrally.

A fulcrum portion hydraulic jack which is supported on the side of the fulcrum whose one end is supported on the side of the fulcrum of the reaction portion and whose other end is deformed,

And further includes n number of fulcrums fixed to the fulcrum of the fulcrum for restraining the fulcrum from returning to the fulcrum of the fulcrum.

According to the method and apparatus for recovering a deformation girder using the hydraulic jack in accordance with the present invention, the deformation of the deformation girder is eliminated by the jacking force of the hydraulic jack by utilizing the stiffness of the other It can be restored. After the deformation is removed, the vertical decks are joined to the girders of the central part and the fulcrum of the stiffener to prevent re-deformation. When the girder fixing frame and the vertical bar are removed after the cross bar is installed, the complete girder is recovered to effectively prevent the bad construction of the girder .

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an installation state of a device for recovering a deformed girder using a hydraulic jack and a section rigidity according to the present invention. FIG.
Figures 2a and 2b are a front view and a plan view of Figure 1;
Fig. 3 is a plan view showing an installation state of a girder fixing frame and a hydraulic jack in a state where four girders form an outwardly convex symmetric shape. Fig.
Figs. 4A to 4E are process flow diagrams for removing deformation of four girders in the central portion and the focal portion in the case of Fig. 3;
5 is a plan view showing the installation state of a girder fixing frame and a hydraulic jack in a state in which four girders form a symmetrically deformed shape concaved inward.
6A to 6D are process flow diagrams for removing deformation of four girders in the central portion and the focal portion in the case of Fig.
7 is a plan view showing the installation state of the girder fixing frame and the hydraulic jack in a state where the four girders deform in a curved shape in any one direction.
Figs. 8A to 8D are process flow diagrams for removing deformation of four girders in the case of Fig.
9 is a front view showing a state in which a deformation preventing brace for preventing deformation of a center portion and a fulcrum of a fulcrum portion according to the present invention is installed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

The present invention is based on the assumption that when one or more girders of _n girders (G ₁ , ..., G _n ) mounted on alternating (2) and pier (3) And to provide a method and an apparatus for restoring the same.

Since the girder (deformed girder) to be subjected to the deformation restoration has the maximum deformation amount at the center portion, the deformation is removed at the center portion side by using the center hydraulic jack 14 as shown in FIG. 2B. At this time, the center hydraulic jack 14 is designed to obtain reaction force using the rigidity of the other girder except the deformed girder. In order to obtain a reaction force at both flank portions of the n girders G ₁ , .., G _n , the fulcrum girder fixing frames 10a, 10a and the fulcrum strut brackets 16a are installed as shown in Figures 3 and 4A central girder fixing frames 10 and 10 and a central strut 16 are installed at the center of _n girders G ₁ , .., and G _n .

At this time, the sprung part strut 16a and the center strut 16 are installed between the other girders except for the girder to be deformed. Therefore, when the deformation of the girder is removed by the hydraulic jack 14, the n-1 tread girders exert the rigidity integrally through the center girder fixing frames 10, 10 and the center strut 16.

For example, when four girders (G ₁ , G ₂ , G ₃ and G ₄ ) are installed during the construction of a bridge as shown in FIG. 3, if deformation occurs in the first girder G ₁ , And the rigidity of the _second , _third , and fourth girders (G ₂ , G ₃ , G ₄ ) is used to remove and restore the deformation to the hydraulic jack 14. At this time, it is preferable that a pair of upper and lower hydraulic jacks 14 press the upper and lower flange side surfaces of the deformed first girder G ₁ .

At this time, n central vertical bars N ₁ ,..., N _n are joined to the center fixing frames 10, 10 to suppress the restoration of the recovered first girders G ₁ . Namely, the n central vertical bars N ₁ ,..., N _n located on the side of the girder on which the deformation has been removed are selected and joined to the middle fixing frames 10, 10.

Here, the other girders which are not subject to deformation or whose deformation is to be removed are mutually supported via the center strut 16, and exhibit rigidity when the jacking force of the hydraulic jack 14 is generated. The center strut 16 is also installed between the central girder fixing frame 10 and the outermost girder G ₄ or G ₁ and then removed.

When the deformation removing operation of all the girders is completed, as shown in FIG. 4E, the center beam 5 and the branch beam 5a are installed at the central portion and the beam portion, respectively, and then the central girder fixing frames 10, ₁ ,..., N _n ) and by dismantling the fulcrum fixing frame 10a and the fulcrum vertical sections N ' ₁ , .., N' _n , the deformation of all the girders is removed and restored.

Here, the center girder fixed frames 10, 10 and the fulcrum girder fixed frames 10a, 10a can be constituted by a steel material or a pipe having an H-shaped or I-shaped cross section. Accordingly, the center girder fixing frames 10 and 10 are provided so as to receive the entire cross-section of the _n girders G ₁ , .., G _n having square openings inwardly. The height of the openings is determined by the height of the girders Respectively. At this time, the lengths of the center girder fixing frames 10, 10 and the fulcrum fixing portions 10a, 10a can be changed according to the increase or decrease in the number of installed girders.

At this time, the fulcrum girder fixing frames 10a and 10a may be installed on the upper surface of the section steel 5 provided on the side of the alternate (or pierced) bad block as shown in FIG. In the present embodiment, the section steel 5 serves to fix the fixed frame to the bad block and is not limited to a specific structure.

< Application example  1>

In Application Example 1, four girders (G ₁ , G ₂ , G ₃ , and G ₄ ) are deformed into a symmetrical shape convex outward with respect to the center axis of the bridge as shown in FIGS. 3 and 4.

1st Girder  Remove deformation

One end of the center hydraulic jacks 14 and 14 is supported by the girder fixing frame 10 and the other end thereof is supported between the outermost first girders G ₁ as shown in FIG. 4A, and the other girders G ₂ and G ₃ and G ₄ are supported on the girder fixing frame 10 by means of the strut 16 to utilize them as reaction force stages and then the central hydraulic jacks 14 and 14 are extended to form the first girders G ₁ ) Is moved to the original position to remove the deformation.

The central beam beotimbo 16 is provided between the other girder _{(G 2, G 3, G} 4) between the central portion and between the girders of the flange 10 and the girders 4 (G _4). A first girder (G _1), the other variations of the girder in jaekryeok yuapjaek central portion (14,14) during removal of _{(G 2, G 3, G} 4) should exhibit a rigidity in one piece.

When the deformation of the first girder G ₁ is removed, the vertical center N ₁ of the first central portion is brought into contact with the side surface of the first girder G ₁ while the jacks of the hydraulic jacks 14, And fixed to the fixed frame 10. Thereafter, the hydraulic jacks 14 and 14 are removed. Therefore, the first girder G ₁ is restored to the original state before the deformation, and then supported at the center vertical section N ₁ , so that the first girder G ₁ can not be re-deformed. The center vertical section (N ₁ ) can be fixed using welding or bolt fastening. At this time, it is preferable that the central vertical section N ₁ is made to have sufficient rigidity such that the first girder G ₁ can not be deformed again.

On the other hand, when the first girder G ₁ is deformed and removed, the fulcrum girder fixing frames 10a and 10a and the spigot brackets 16a are installed as shown in FIG. 4A. In addition, the restoration work for moving the fulcrums of the first girder G ₁ to the original position can also be performed at the fulcrums using the fulcrum hydraulic members 14a and 14a. At this time, the operating direction of the fulcrum hydraulic members 14a, 14a at the fulcrums is opposite to the operating direction of the middle-pressure hydraulic members 14, 14 at the central portion.

The first fulcrum portion so that after the movement of the girder (G ₁₎ to secure the point of the riser portion (N _'1) to the branch section girder flange (10a) being the return branch portion of the first girder (G _1).

Fourth Girder  Remove deformation

The center strut 16 installed between the center girder fixing frame 10 and the first girder G ₁ is removed and the first girder G ₁ and the second girder G ₂ , The hydraulic jack 14 provided between the fourth girder G ₄ and the strut bracket 16 supported by the central girder fixing frame 10 is operated to form the fourth girder G ₄ , G ₄ ). In this case, the girders (G ₁ , G ₂ , G ₃ ) are utilized as reaction force stages.

After the deformation of the fourth girder G ₄ is removed, the fourth central vertical section N ₄ is further fixed to the girder fixing frame 10 so as to be supported at a position where the fourth girder G ₄ is pushed out .

On the other hand, when the fourth girder G ₄ is deformed and removed, the fulcrum girder fixing frames 10a and 10a and the spigot brackets 16a are installed as shown in FIG. 4b. There is also a recovery operation can be made while at the same time by using a fulcrum portion hydraulic material (14a, 14a) in the fulcrum portion moves to the home position of the fourth section points girder (G _4). At this time, the operating direction of the fulcrum hydraulic members 14a, 14a at the fulcrums is opposite to the operating direction of the middle-pressure hydraulic members 14, 14 at the central portion.

4 should not be added points of the girder (G ₄₎ a first girder (G ₄₎ to secure the point portion after moving fulcrum portion riser (N _'4) on a branch portion girder flange (10a) of the return.

Second Girder  Remove deformation

The deformation of the second girder G ₂ is removed as shown in FIG. 4C. At this time, the central hydraulic jacks 14 and 14 are positioned between the second girder G ₂ and the first girder G ₁ , and the center hydraulic jack 14 is connected to the other girders G ₁ and G ₃ , and G ₄ ) as reaction ends, the second girder G ₂ is moved to remove deformation.

After the deformation of the second girder G ₂ is removed, it is fixed to the center girder fixing frame 10 so as to support the second girder G ₂ at the position where the central vertical bar N ₂ is pushed out in the same manner as described above.

On the other hand, when the deformation of the second girder G ₂ is removed, the rest portion of the fourth girder G ₄ is simultaneously moved to the rest position by using the fulcrum hydraulic members 14a and 14a in the same manner . At this time, the operating direction of the fulcrum hydraulic members 14a, 14a at the fulcrums is opposite to the operating direction of the middle-pressure hydraulic members 14, 14 at the central portion.

A second secure the girder (G ₂₎ for vertical branch portion (N _'2) and then moving the fulcrum portion of the girder flange fulcrum portion (10a) to prevent the return portion of the second girder point (G _2).

Third Girder  Remove deformation

The deformation of the third girder G ₃ is removed as shown in FIG. 4D. At this time, the third girder G ₃ is moved to the central hydraulic jack 14 by removing the treaders G ₁ , G ₂ , and G ₄ as reaction ends, thereby removing the deformation. 3 is secured to the center girder flange (10) girder at the position (G ₃₎ pushed to the center riser (N ₃₎ in addition to the same method as above after removal modified third to support a third girder (G ₃₎ Leave.

On the other hand, the third girder (G ₃₎ stress-relief upon the fulcrum portion in the same manner as the point portion hydraulic material (14a, 14a) for use by a third girder (G ₃₎ the recovery operation for moving to a point part-situ made at the same time the . At this time, the operating direction of the fulcrum hydraulic members 14a, 14a at the fulcrums is opposite to the operating direction of the middle-pressure hydraulic members 14, 14 at the central portion.

Third prevent girder (G ₃₎ additional points of the third girder (G ₃₎ to secure the point portion after moving fulcrum portion riser (N _'3) to the girder flange fulcrum portion (10a) of the return.

The first through fourth central vertical bars N ₁ , N ₂ , N ₃ , N ₄ and the vertical vertical bars N ' ₁ , N' ₂ , N ' ₃ , N' ₄ , After the deformation of the deformation girder is completed, the decks are not removed until the center beam 5 and the branch beams 5a are installed, and are held together with the center girder fixing frames 10, 10 and the branching portion fixing frames 10a, 10a do.

Then, the final four girder as shown in FIG. 4e (G _1, .., G _4), the central portion across the middle cross beam 5 and the branch portion intersecting point cross beam portion (5a) of four girders on (G _1, .., G ₄₎ after the center girder flange (10 and 10 provided between the between), branch section girder flange (5a, 5a), the center riser (N _1, N _2, N _3, N _4,) and By dismantling the vertical sections (N ' ₁ , N' ₂ , N ' ₃ , N' ₄ ,) of the fulcrum section, the section girder and the complete recovery of the deformation girder using hydraulic jacks are achieved.

Here, the center beam 5 and the beam 5a may be installed by being poured in concrete or may be constructed by a steel beam.

< Application example  2>

In Application Example 2, four girders (G ₁ , G ₂ , G ₃ , and G ₄ ) are symmetrical inward with respect to the center axis of the bridge as shown in FIG.

Fourth Girder  Remove deformation

One end of the central hydraulic jacks 14 and 14 is supported on the third strut G ₃ side center strut 16 and the other end thereof is supported between the outermost fourth girders G _{4 as} shown in FIG. (G ₁ , G ₂ , G ₃ ) used as reaction force stages are supported on the central girder fixing frame 10 by using the center strut 16 and then the central hydraulic jack 14 is stretched and deformed by the jacking force The fourth girder G ₄ is forcedly moved to its original position to remove deformation.

When the deformation of the fourth girder G ₄ is removed, the temporary strut 17 is installed and the first central vertical section N _{1 is} connected to the first girder G ₁ while the jacking force of the central hydraulic jack 14 is maintained. And is fixed to the girder fixing frame 10. Temporary beotimbo 17 is installed to one end supported on the third girder (G ₃₎ and the other end supporting the fourth girder (G ₄₎ to. The temporary strut 17 preferably has a screw jack at one end or both ends thereof.

Then, the central hydraulic jack 14 is removed. Therefore, the fourth girder G ₄ is restored to the original state before the deformation, and is then supported on the temporary strut 17 and the center vertical bar N ₁ , so that the fourth girder G ₄ can not be re-deformed.

1st Girder  Remove deformation

Figure 6b is operated as a first girder (G ₁₎ and the central portion yuapjaek provided between the second girder (G ₂₎ (14,14) to remove the deformation of the first girder (G _1). At this time, one end of the central hydraulic jacks 14 and 14 is deformed in the state that the first girder G ₁ is supported by the second girder G ₂ through the center strut 16. [

After the deformation of the first girder G ₁ is removed, the first vertical central portion N ₁ is further fixed to the central girder fixing frame 10 so as to be supported at the position where the first girder G ₁ is pushed out Leave.

At this time point, the center portion yuapjaek (14,14) and the fulcrum portion yuapjaek installed in the opposite direction (14a, 14a) branches of the first girder (G ₁₎ for vertical branch portion (N _'1) after moving the point of via It is joined to the girder flange portion (10a) to prevent the return point after movement of the first girder (G _1).

Second Girder  Remove deformation

When you want to eliminate the deformation of the second girder (G ₂₎ as shown in Figure 6c, the other girder _{(G 1, G 3, G} 4) to the second girder (G ₂₎ a central portion yuapjaek (14,14 to the reaction stage ) To remove the deformation. After the deformation of the second girder G ₂ is removed, the center girder fixing frame 10 is moved in the same manner as described above so as to suppress the return of the second girder G ₂ at the position where the second central vertical section N ₂ is further pushed out And fix it.

At this time point, the center portion yuapjaek (14,14) and the fulcrum portion yuapjaek installed in the opposite direction (14a, 14a) of the second girder (G ₁₎ a branch point of the riser portion (N _'2) after moving over the point of the It is joined to the girder flange portion (10a) to prevent a return movement after the point of the second girder (G _2).

Third Girder  Remove deformation

The deformation of the third girder G ₃ is removed as shown in FIG. 6D. This is to remove the deformation to move the second girder (G ₂₎ and a third girder (G _3), the third girder with jack kingryeok After placing the center yuapjaek (14,14) between the (G _3). At this time, the central hydraulic jacks 14 and 14 generate a jacking force in a state in which one end receives a reaction force from the second girder G ₂ side via the strut 16.

First to prevent the return of a third girder (G ₃₎ 3 by installing the girder (G ₃₎ in the same manner as above after the removal of the transformation center the riser (N ₃₎ at the center girder flange (10).

At this time point, the center portion yuapjaek (14,14) and a fulcrum portion provided in the opposite direction yuapjaek (14a, 14a) to a third girder (G ₃₎ branches to point the riser portion (N _'3) after moving over the point of the It is joined to the girder flange portion (10a) to prevent a return movement after the point of the third girder (G _3).

Subsequently, as in Application Example 1, the center beam 5 and the branch beam 5a are installed between the four girders G ₁ , .., G ₄ , and then the center girder fixing frames 10, fulcrum portion girder flange (5a, 5a), the center riser _{(N 1, N 2, N} 3, N 4,) and a branch part the riser _{(N '1, N' 2} , N '3, N' 4,) The complete section of the deformation girder is obtained by using the hydraulic jack.

< Application example  3>

Application Example 3 is a case where all four girders (G ₁ , G ₂ , G ₃ , and G ₄ ) are deformed into a curved shape in one direction of the bridge width as shown in FIG. 7, This is the case where the deformation is removed with priority given to the girder G ₁ .

1st Girder  Remove deformation

Yuapjaek the central portion (141,14) as shown in Figure 8a the first girder (G ₁₎ and the second girder (G ₂₎ was placed between the original position to force the first girder (G ₁₎ of the deformed jack kingryeok Move to remove deformation. At this time, one end of the central hydraulic jacks 14 and 14 is supported by the second girder G ₁ via the central buckle bed 16, and the one end of the central hydraulic jacks 14 and 14 is disposed between the other girders G ₂ , G ₃ and G ₄ And is supported by the center strut 16 to secure rigidity. At this time, a center bur bur 16 is also provided between the fourth girder G ₄ and the center girder fixing frame 10.

When the deformation of the first girder G ₁ is removed, the temporary strut 17 is installed as shown in FIG. 7 and the center vertical frame N ₁ is brought into contact with the side face of the first girder G ₁ , 10). Thereafter, the hydraulic jacks 14 and 14 are removed. The temporary strand (17) is installed between the first girder (G ₁ ) and the second girder (G ₂ ). The temporary strut 17 may be provided with a screw jack at one end or both ends thereof.

At this time point, the center portion yuapjaek (14,14) and the fulcrum portion yuapjaek installed in the opposite direction (14a, 14a) branches of the first girder (G ₁₎ for vertical branch portion (N _'1) after moving the point of via It is joined to the girder flange portion (10a) to prevent the return point after movement of the first girder (G _1).

Fourth Girder  Remove deformation

The hydraulic jack 14 provided between the center girder fixing frame 10 and the fourth girder G ₄ is actuated to remove the deformation of the fourth girder G ₄ by a jacking force as shown in FIG.

After deformation of the fourth girder G ₄ , the fourth vertical center N ₄ is further fixed to the center girder fixing frame 10 in such a manner as to be supported at a position where the fourth girder G ₄ is pushed out Leave.

At this time point, the point of the center portion yuapjaek (14,14) and a fulcrum portion provided in the opposite direction yuapjaek (14a, 14a) of claim 4 girders (G ₁₎ for vertical branch portion (N _'4) after moving over the point of the It is joined to the girder flange portion (10a) to prevent a return movement after the point of the fourth girder (G _4).

Second Girder  Remove deformation

The deformation of the second girder G ₂ is removed as shown in FIG. 8C. This is because the center hydraulic jacks 14 and 14 are positioned between the second girder G ₂ and the third girder G ₃ and then the second girder G ₂ is moved by the jacking force to remove deformation. At this time, the center hydraulic jack 14 is operated in a state of receiving the reaction force from the side of the third girder G ₃ via the middle bracket 16.

After the deformation of the second girder G ₂ is removed, it is fixed to the center girder fixing frame 10 so as to support the second girder G ₂ at the position where the central vertical bar N ₂ is pushed out in the same manner as described above.

At this time point, the point of the center portion yuapjaek (14,14) and a fulcrum portion provided in the opposite direction yuapjaek (14a, 14a), a second girder (G ₂₎ for vertical branch portion (N _'2) then move the point of the through It is joined to the girder flange portion (10a) to prevent a return movement after the point of the second girder (G _2).

Third Girder  Remove deformation

The deformation of the third girder G ₃ is removed as shown in FIG. 8D. This eliminates the deformation of the third girder G ₃ by the jacking force of the central hydraulic jacks 14, 14 provided between the third girder G ₃ and the fourth girder G ₄ . At this time, the third girder (G ₃ ) is moved to the hydraulic jack (14) with the rubber girders (G ₁ , G ₂ , G ₄ ) as reaction ends and the deformation is removed. The third place is secured to the girder flange (10) girder at the position (G ₃₎ pushed to the center riser (N ₃₎ in addition to the same method as above after removal modified third to support a third girder (G ₃₎ .

At this time point, the center portion yuapjaek (14,14) and a fulcrum portion provided in the opposite direction yuapjaek (14a, 14a) to a third girder (G ₃₎ branches to point the riser portion (N _'3) after moving over the point of the It is joined to the girder flange portion (10a) to prevent a return movement after the point of the third girder (G _3).

4E, the center beam 5 and the branch beam 5a are installed between the four girders G ₁ , .., G ₄ , (10 and 10), the fulcrum portion girder flange (5a, 5a), the center riser (N _1, N _2, N _3, N _4,) and a point of the riser section _{(N '1, N' 2} , N '3 , N ' ₄ , are disassembled to achieve complete restoration of the section girder with the section stiffness and the hydraulic jack.

Meanwhile, in the present invention, each of the center girder fixing frames 10, 10 and the branch portion girder fixing frames 10a, 10a may be further provided with a fixed-frame deformation preventing brace 20 to prevent twisting deformation. For example, as shown in Fig. 9, a plurality of fixed-type deformation-preventing braces 20 are provided in the oblique direction on the side surfaces of the respective girder fixing frames.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

G ₁ , .., G _n : girder
N ₁ , .., N _n : central vertical stand
N ' ₁ , .., N' _n :
5: Central Section
5a: Branch branch line
10: Center girder fixing frame
10a: Branch bucket girder
14: Central hydraulic jack
14a: Branch hydraulic jack
16: Center strut
16a: Branch branch team
17: Temporary stratum
20: anti-deformation brace

Claims (10)

CLAIMS 1. A method for recovering a deformation of a girder of at least one of _n girders (G ₁ , .., G _n )
Two points girder flange portion (10a, 10a) for each of n number of girders arranged at a right angle to the longitudinal direction on both sides of the fulcrum portion (G _1, .., G _n), and the fulcrum portion girder flange (10a, 10a) and recovery Installing and arranging a branch substemble (16a) for the integral behavior between the other girders rather than the order of the objects;
2 the central portion of the girder flange (10 and 10) n girder (G _1, .., G _n) disposed side by side at a right angle to the longitudinal direction at the center of, and the center girder flange (10, 10) and the recovery of the target sequence A center strut 16 for integrally acting between the other stranded girders;
Reaction force point portion end and then the other by using the rigidity of the girder eliminate deformation of the girder is deformed in a central portion of the jack kingryeok yuapjaek 14, the center riser (N _1, .., _n N) to the center girder flange using (10, 10) to restrain the return of the deformation-removed girder;
Finally, the n girder (G _1, .., G _n), the center cross beam 5 and the fulcrum portion of the girder cross beam n a a _{(5a) (G 1, ..} , G n) and the center point in between of the And a step of fixing the section girder to the lower portion of the girder. The method according to claim 1,
(N ' ₁ ,..., N' _n ) are generated at the fulcrum portion hydraulic jacks (14a, 14a) (10a, 10a). The method of claim 1, further comprising: The method according to claim 1,
And when the deformed girder is located at the outermost side and has a concave shape inward, it further includes a step of installing a temporary strut bracket (17) after deformation of the corresponding girder, and a method of recovering the deformed girder using the hydraulic jack . The method according to claim 1,
If all of the n girders (G ₁ , .., G _n ) are deformed to form a convexly symmetrical shape,
Of the inner net in the outer gamyeo transferred to yuapjaek central portion (14,14) with the girder _{(G 1, G n, G} 2, G n -1, G 3, ..) of which it comprises selecting going to remove the deformed alternately Sectional Stiffness and Recovery Method of Deformed Girder Using Hydraulic Jack. The method according to claim 1,
When all of the n girders G ₁ , .., G _n are deformed and have a concave symmetrical shape inward,
(G ₁ , G _n , G ₂ , G _{n -1} , G ₃ , ...) alternately from outer side to inner side while moving the central hydraulic jacks 14 and 14,
Further comprising the step of providing a temporary strand (17) on the side of the girder after the deformation of the outermost girder (G ₁ or G _n ) is removed, and a method of recovering the deformation girder using the hydraulic jack. The method according to claim 1,
When all of the n girders (G ₁ , .., G _n ) are deformed to form a curved shape in one direction,
And the deformation of the outermost girder which is farthest from the radius of curvature is removed first and the deformation of the inner and outer girders is successively alternated successively by moving the central hydraulic jacks (14, 14). A method of recovering a deformed girder. The method according to claim 1,
Further comprising the step of additionally providing a deformation preventing brace (20) for preventing deformation to the center girder fixing frames (10, 10) and the fulcrum fixing portions (10a, 10a) after the deformation of the girders is completed And a method of recovering a deformed girder using a hydraulic jack. The method according to claim 1,
Wherein the center strut (16) and the staple strut (16a) have screw jacks at one or both ends, and a method of recovering the deformation girder using the hydraulic jack. An apparatus for restoring a deformation in one or more of _n girders (G ₁ , ..., G _n )
a pair of central fixing frames 10, 10 installed so as to surround the central portions of the _n girders G ₁ , .., G _n at right angles to the longitudinal direction;
Center girder flange (10, 10) and the n number of girders _{(G 1, .., G n} ) and the central portion beotimbo 16 is provided so as to behavior integrally with;
A middle hydraulic jack (14, 14) which is supported by a reaction force end on one side of a central fixed frame (10, 10) and is supported by an action end on a side of a girder on which the other end is deformed to remove deformation of the girder by hydraulic pressure;
N central vertical bars (N ₁ , ..., N _n ) fixed to the fixed frames (10, 10) and restraining deformation of the girders;
n number of girders _{(G 1, .., G n} ) point of the girder flange portion, which is installed to surround enclosing a right angle to both the longitudinal direction of the branch portions (10a, 10a) and;
Point girder flange portion (10a, 10a) and the n number of girders _{(G 1, .., G n} ) are modified by a cross-section girder, characterized in that the stiffness and yuapjaek including beotimbo fulcrum portion (16a) that is provided so as to integrally Behavior Recovery device. 10. The method of claim 9,
(14a, 14a) which is supported by a reaction end on one side of the fuselage fixture (10a, 10a) and whose other end is deformed and which is supported by the action end on the side of the girder and removes deformation of the girder by hydraulic pressure;
(N ' ₁ , ..., N' _n ) fixed to the focal points fixed to the focal points (10a, 10a) and suppressing restoration of focal point deformation of the corresponding girder. And a device for recovering a deformed girder using a hydraulic jack.

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