KR20200061327A - Bracket for cantilever and cantilever construction method using the bracket - Google Patents

Abstract

The present invention relates to a bracket for a cantilever and a cantilever construction method using the same and, more specifically, to a bracket for a cantilever including a support frame, a fixing plate, a guide piece, a pulling means and a supporter, and a cantilever construction method using the bracket for a cantilever, which comprises a cantilever bracket manufacturing step, a cantilever bracket assembly installation step, a welding fixing step, a precast panel placement installation step, a concrete placement and curing step, and a cantilever bracket supporter separation step. Therefore, the bracket can be installed and fixed by freely selecting a position in the longitudinal direction of a girder without the need for anchor work which is the procedure of pre-installing an anchor bolt on the girder. Thus, constructability can be considerably improved with a simplified cantilever construction process, while a supporter can be semi-permanently reused by being separated after the construction of a cantilever, which can lead to a significant reduction in construction costs.

Description

Bracket for cantilever and cantilever construction method using the bracket

The present invention relates to a cantilever bracket and a cantilever construction method using the same, and more specifically, a cantilever bracket and a cantilever bracket manufacturing step, including a support frame, a fixing plate, a guide piece, a pulling means and a stand, assembling the cantilever bracket By applying the cantilever construction method using the cantilever bracket, which includes the installation step, the welding fixation step, the precast panel seating installation step, the concrete pouring and curing step, and the cantilever bracket bracket separation step, the anchor bolt for the anchor bolt on the girder is applied. It is possible to freely select and fix the installation position in the longitudinal direction of the girder without the need for anchoring, which is the installation process. Through this, the cantilever construction process is simplified to significantly improve the constructability, while the cantilever is removed after construction. Therefore, it can be reused semi-permanently. Accordingly, the present invention relates to a cantilever bracket and a cantilever construction method using the same, which can significantly reduce construction costs.

Looking at the structure of a general bridge, it is largely composed of a bridge installed at regular intervals, a girder installed to connect the bridges, a slab installed on the girder, and a cantilever installed on both sides of the slab.

Looking at the structure of the conventional cantilever, as shown in Korean Patent Registration No. 1101209 (registered on December 26, 2011.), a steel permanent support is installed at regular intervals on the side of the girder, and the end of the steel permanent support is made of a long wire. On the other hand, the precast floor plate is installed on the steel base and joist.

Here, since the steel permanent support includes the installation of a joist material for placing the panel and the load of the work passage, there is a problem in that the size of the permanent support is large and the method of installation cannot adjust the deflection of the permanent support and the gradient of the bridge deck.

1 is an exemplary cross-sectional view showing a cantilever construction structure using a conventional cantilever bracket.

As a means for solving the above problems, while the one end as shown in Figure 1 is placed on the girder (1) while the fastening to fasten the anchor bolt protruding to the top of the girder (1) at one end. A horizontal panel 11 on which 11a) is formed; The vertical panel 12 formed on one side of the lower end of the horizontal panel 11 to support the horizontal panel 11 in close contact with the side surface of the girder 1 in a state where one end of the horizontal panel 11 is placed on the girder 1. ); And it is installed in the space between the other side of the vertical panel 12 and the lower portion of the horizontal panel 11 to increase the reinforcing force, one side cross-section is supported by the vertical panel and the upper portion is formed to support the horizontal panel Support (13); is provided with a cantilever bracket (10) configured to include.

However, as described above, the cantilever bracket 10 has a vertical panel 12 under the horizontal panel 11 in a state where the fastener 11a of the horizontal panel 11 is bolted to the anchor bolt of the girder 1. ) Since the support 13 is integrally formed, after the cantilever is constructed, the horizontal panel 11 as well as the vertical panel 12 and the support 13 integrally fixed to the lower part of the horizontal panel 11 are removed. There are structural disadvantages that cannot be done.

In other words, the conventional cantilever bracket as described above has a drawback that causes a lot of waste in terms of resources because it cannot be recycled after construction of the cantilever, and increases the construction cost of the cantilever, and the bracket for cantilevers after construction At this time, there was a problem in that the maintenance cost was excessively caused in relation to corrosion because it was left exposed to the outside at all times.

Moreover, the conventional cantilever bracket as described above is installed on the girder through an anchor bolt previously embedded on the girder and a nut fastened to the anchor bolt, and for installation, an anchor is previously installed in the manufacturing process of the girder. Since the process of manufacturing the girder becomes longer because of the need to be buried, there was a problem in that the air for the cantilever construction was delayed.

In addition, as the conventional cantilever bracket is installed on the girder through an anchor bolt previously embedded on the girder and a nut fastened to the anchor bolt, it can be installed only at a position corresponding to the previously embedded anchor bolt position when manufacturing the girder. There was a problem that it could not be freely adjusted and installed without being limited to a fixed position relative to the installation position in the longitudinal direction of the girder.

Therefore, it is possible to freely select and fix the position in the longitudinal direction of the girder without requiring the anchor work, which is the installation process for the anchor bolt in advance on the girder. Through this, the cantilever construction process is simplified to significantly improve the workability. On the other hand, after the cantilever is installed, the cantilever bracket can be separated and reused semi-permanently. Therefore, research and development of the cantilever bracket and the cantilever construction method using the same can be required to significantly reduce the construction cost. .

Registered Korean Patent No. 0721172 2007.06.04. Registered Republic of Korea Patent No. 1101209 2011.12.26. Registered Republic of Korea Patent No. 1101204 December 26, 2011. Registered Republic of Korea Patent No. 1699888 2017.01.19. Republic of Korea Registered Patent No. 1576576 2017.08.01. Republic of Korea Patent Publication No. 2017-0107308 2017.09.25.

In order to solve the above problems, the present invention is a cantilever bracket and a cantilever bracket manufacturing step including a support frame, a fixed plate, a guide piece, a pulling means and a support, a cantilever bracket assembly installation step, a welding fixing step, a free By applying the cantilever construction method using the cantilever bracket, which includes the cast panel seating installation step, the concrete placing and curing step, and the cantilever bracket stand separation step, the anchor work, which is the installation process for the anchor bolts in advance on the girder, is required. The purpose of the present invention is to provide a cantilever bracket and a cantilever construction method using the same, which can freely select a position in the longitudinal direction of the girder and fix and install the cantilever, thereby simplifying the cantilever construction process and greatly improving the constructability.

Another object of the technology according to the present invention is a cantilever bracket and a cantilever bracket manufacturing step including a support frame, a fixing plate, a guide piece, a pulling means and a stand, a cantilever bracket assembly installation step, a welding fixing step, a precast panel seating By applying the cantilever construction method using the cantilever bracket, which includes the installation step, the concrete pouring and curing step, and the cantilever bracket separation step, after the cantilever is installed, the pedestal can be separated and reused semi-permanently, thereby reducing the construction cost. It is aimed at making significant savings.

The present invention for achieving the above object is as follows. That is, the bracket for a cantilever according to the present invention has a predetermined interval on an upper surface and is installed to protrude outwardly on a girder side that is disposed on the outermost side of a pier where a rod-type protruding root is protruded, in a bracket for a cantilever for constructing a cantilever, It is provided as a'U'-shaped frame or'L'-shaped frame having a certain length so as to be closely supported on one side of the protruding muscle protruding to the top of the girder disposed on the outermost side of the pier, through-holes are formed in the center of the vertical portion in the longitudinal direction. Support frame; It is provided as a plate on the plate, and is provided in an'L' shape in the center of the width direction of one side, and the lower side of the fixing bracket having a through hole formed in the center of the vertical portion is welded and fixed, and the width direction of the girder is fixed by a certain length. A fixed plate disposed in close contact with the upper surface of the side and having a predetermined interval in two rows on the other side, through-holes are formed; It is provided in a rectangular plate shape so that one side of the fixed plate is sandwiched between the protruding muscles projecting to the top of the girder, and one end is fixed to the upper surface of one end of the fixed plate by welding from both sides in the width direction of the fixed plate. A guide piece protruding out of a predetermined length from one side of the plate; The fixing frame is installed through the through hole of the fixing bracket provided on the fixing plate and the through hole of the supporting frame so that the supporting frame can be fixed by pulling through the fastening force in a state in which the supporting frame is closely supported to the protruding muscle of the girder. Pulling means consisting of a fixing nut fastened to the end of the fixing bolt; And once the side is in close contact with the side of the girder so that the side of the girder protrudes outward to the side of the girder, the upper part is fixedly installed with the fixing plate through bolts and nuts, and when the cantilever is installed, the precast panel is seated and the lower surface of the precast panel is installed. It comprises a pedestal to support.

Here, the pulling means includes a fixing bolt and a fixing nut, but is applied to two or more sets, while the through holes of the support frame and the through holes of the fixing bracket may correspond to the set of pulling means and be formed through two or more.

Moreover, the pedestal is provided in an H beam type having a certain length, and is provided in a vertical plate on one end of the main body and the main body through which two holes are formed through one row of the upper horizontal panel part, and one side is in close contact with the side of the girder. It is preferably made to include a vertical adhesion plate.

On the other hand, the cantilever construction method using the cantilever bracket according to the present invention is applied to the cantilever bracket which is disposed on the outermost side of the pier but is installed to protrude outwardly to the side of the girder with a certain distance on the upper surface and the rod-type protruding muscle is protruding. In the cantilever construction method using a cantilever bracket for constructing a cantilever of a bridge, a precast panel is installed and installed at a girder side disposed at the outermost side of the bridge with a certain interval in the longitudinal direction. It is provided as an'U'-shaped frame or'L'-shaped frame, a support frame through which a through hole is formed in the longitudinal center of the vertical part. One end is fixed by welding and is provided with guide pieces, fixed bolts and fixed nuts, which are arranged with a fixed length outward from one side of the fixed plate. Once the side is in close contact with the side of the girder so that the pulling means to be fixed and the side of the girder protrude outward, once the upper part is fixedly installed with the fixing plate through bolts and nuts, the precast panel is seated and installed during the construction of the cantilever. A cantilever bracket manufacturing step of manufacturing a cantilever bracket comprising a pedestal for supporting a lower surface of the panel; Assemble and install the cantilever bracket manufactured through the cantilever bracket manufacturing step so as to be disposed over the side wall from the top of one side of the girder, but assemble and install the pedestal from the side wall of the girder to protrude a certain length, and have a certain interval in the longitudinal direction of the girder. Assembling and installing the cantilever bracket assembly with a set of steps; A welding fixing step in which the cantilever bracket is installed in such a manner that the base is protruded from the side wall of the girder through a step of assembling and installing the cantilever bracket, and the welding frame is fixed in close contact with the top surface of the guide against the bottom of both sides of the support frame width of the cantilever bracket; It is performed after the welding fixing step, and the precast panel is mounted between the neighbors to the brackets of the cantilever bracket installed through the assembly installation step of the cantilever bracket so that the precast panels are successively seated in the longitudinal direction of the girder. Panel seating installation step; After the precast panel seating installation step, the reinforcement in the field on the upper surface of the precast panel installed, the concrete pouring and curing step of pouring concrete to cure; And after curing is completed through the pouring and curing steps of the concrete, the fixing plate and the fixing bolt to be exposed to the outside of the fixedly installed base are released to separate the base of the cantilever bracket to release the bracket of the cantilever bracket.

At this time, the cantilever bracket assembly installation step is to assemble and install the cantilever bracket produced through the cantilever bracket manufacturing step from the top of one side of the girder so that the pedestal protrudes from the side wall of the girder by a certain length, and supports the support frame. Arranged so as to be in close contact with one side of the protruding muscle protruding from the upper side, and having one end of the pedestal assembled and fixed to the other side through the between the protruding muscles with respect to the guide piece, one side of the girder has a certain length on the upper surface. After being seated so that the other side is in close contact with a certain length, the fixing bolts and fixing nuts, which are pulling means, are penetrated through the through holes of the support frame and through the holes of the fixing brackets, and tighten the fixing nuts to one end of the main body of the pedestal. It is preferable that the provided vertical adhesion plate is made of a process of being in close contact with the side wall of the girder.

Moreover, of the cantilever brackets produced through the steps of manufacturing the cantilever bracket, the pedestal is provided in an H beam type having a certain length, and is perpendicular to one end of the main body and the body through which two holes are formed in one row of the upper horizontal panel portion. It is preferable that it is provided in a plate shape, and one surface includes a vertical adhesion plate that is in close contact with the side of the girder.

The effects of the cantilever bracket according to the present invention and the cantilever construction method using the same are as follows.

First, the cantilever bracket and the cantilever bracket manufacturing step, including the support frame, fixing plate, guide piece, pull means and support, the cantilever bracket assembly installation step, welding fixing step, precast panel seating installation step, concrete pouring and curing Step, the cantilever construction method using the cantilever bracket including the step of removing the bracket for the cantilever is applied to freely select the position in the longitudinal direction of the girder without requiring the anchor work, which is the installation process for the anchor bolt in advance on the girder. It can be installed and fixed, and through this, the cantilever construction process is simplified to significantly improve the workability.

Second, the cantilever bracket and the cantilever bracket manufacturing step including the support frame, the fixing plate, the guide piece, the pulling means and the base, the cantilever bracket assembly installation step, the welding fixing step, the precast panel seating installation step, the concrete pouring and curing By applying the cantilever construction method using the cantilever bracket including the step, the cantilever bracket separation step, the cantilever can be separated and reused semi-permanently, thereby significantly reducing the construction cost.

1 is a cross-sectional exemplary view showing a cantilever construction structure using a conventional cantilever bracket.
Figure 2 is a cross-sectional example showing the construction structure of the cantilever constructed by the cantilever bracket and the cantilever construction method using the same according to the present invention.
Figure 3 is an exploded perspective configuration diagram showing a cantilever bracket according to the present invention.
Figure 4 is an exemplary view showing a structure in which the bracket for a cantilever according to the present invention is fixedly installed on a girder.
Figure 5 is an exemplary view showing a structure in which the precast panel is seated and installed after the cantilever bracket according to the present invention is fixedly installed on the girder.
Figures 6a and 6b is an exemplary view showing a structure for separating the pedestal after constructing a cantilever by applying the present invention.
7 is a block diagram showing the cantilever construction method step by step using the cantilever bracket according to the present invention.

Hereinafter, preferred embodiments of the cantilever bracket and the cantilever construction method using the same according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a cross-sectional exemplary view showing the construction structure of a cantilever constructed by a cantilever bracket and a cantilever construction method using the same according to the present invention, Figure 3 is an exploded perspective view showing a bracket for a cantilever according to the present invention.

4 is an exemplary view showing a structure in which the bracket for a cantilever according to the present invention is fixedly installed on a girder, and FIG. 5 is an example showing a structure in which a precast panel is seated and installed after the cantilever bracket according to the present invention is fixedly installed on a girder. 6A and 6B are exemplary views showing a structure for separating a pedestal after constructing a cantilever by applying the present invention.

2 to 6b, the cantilever bracket 100 according to a preferred embodiment of the present invention is installed on the girder 10 to construct the cantilever, the bracket structure for seating and installing the precast panel 20 Is achieved.

Prior to explaining the present invention, first, as described with respect to the girder 10, the cantilever bracket 100 according to the present invention is installed for cantilever construction as described above, the girder 10 is a rod-type protruding muscle 11 ), that is, it is a concrete type girder of a structure including a protruding muscle 11 protruding upward with a predetermined interval in the longitudinal direction of the upper surface in a normal bolt shape as shown in the drawing.

When the bracket 100 for a cantilever according to the present invention is installed for cantilever construction on the girder 10 as described above, the support frame 110, the fixing plate 120, the guide piece 130, the pulling means ( 140) and the pedestal 150.

Specifically, the support frame 110 has a'U' shape having a predetermined length so as to be in close contact with one side of the rod-shaped protruding muscle 11 protruding to the top of the girder 10 disposed on the outermost side of the pier. It is provided as a frame, and the through hole 111 is formed through the center of the vertical portion in the longitudinal direction.

That is, the support frame 110 is preferably formed through the through hole 111 in the center of the vertical portion facing a pair of'U' shaped frame, of course, provided as an'L' shaped frame through the vertical portion This may be formed through.

In addition, the fixing plate 120 is provided as a plate on a plate, and is provided in an'L' shape in the center of the width direction of one side, the lower side of the fixing bracket 120a through which the through hole 121a is formed in the center of the vertical portion. This welding is fixed, and is arranged in close contact with the upper surface of one side in the width direction of the girder 10 by a predetermined length on one side, and the through holes 121 are formed through the other side with a predetermined interval in two rows.

In addition, the guide piece 130 is provided in a rectangular plate shape so that one side of the fixing plate 121 is sandwiched between the protruding muscles 11 protruding to the top of the girder 10, and is provided in a rectangular plate shape. One end of the fixed plate 120 is welded to the upper surface of one end of the fixed plate 120 from both sides of the width direction, so that a fixed length of the fixed plate 120 protrudes outward.

That is, the guide piece 130 is one side of the fixing plate 121 to be sandwiched between the protruding muscles 11 protruding to the top of the girder 10 to be fixed, one pair of fixed plate ( 120) It is fixed to the welding on one side.

In addition, the pulling means 140 is to enable the support frame 110, based on the fixing plate 120, to be fixedly pulled through a fastening force in a state in close contact with the protruding muscle 11 of the girder 10.

The pulling means 140 are fixed bolts 141 and fixing bolts installed through the through holes 121a of the fixing brackets 120a provided on the fixing plate 120 and through holes 111 of the supporting frame 110. It is preferably composed of a fixing nut 142 that is fastened to the end of (141).

Of course, the pulling means 140 is not specifically shown in the drawings, but may be applied with two nuts fastened to both ends of the stud bolt and the stud bolt having threads formed over a predetermined length at both ends.

On the other hand, the pedestal 150 is fixed to the side of the upper surface through the bolt (B) and the nut (N) once the side is in close contact with the side of the girder 10 so as to protrude outward on the side of the girder 10 It is fixedly installed, and when the precast panel 20 is seated and installed during the construction of the cantilever, the lower surface of the precast panel 20 is supported.

In particular, the pedestal 150 is provided in an H beam type having a predetermined length, and is provided at one end of the main body 151 and the main body 151 through which the through holes 151a are formed in two rows on one side of the upper horizontal panel portion. It is preferably made of a vertical plate is provided on the vertical side of the girder 10 is in close contact with the side plate (153).

At this time, when the cantilever is installed on the upper surface of the horizontal panel portion positioned above the main body 151 of the pedestal 150, the precast panel 20 is prevented from slipping during the installation of the precast panel 20 on the upper surface. For this, it is preferable that rubber pads P are further attached to both sides in the width direction.

Moreover, the pulling means 140 in the cantilever bracket 100 according to the present invention having the above-described configuration includes a fixing bolt 141 and a fixing nut 142, while being applied in two or more sets , In this case, the through-hole 111 of the support frame 110 and the through-hole 121a of the fixing bracket 120a correspond to the set of the pulling means 140 and may be formed through two or more.

In other words, the pulling means 150 may be applied as a single set, but may be applied as two or more sets to implement a more stable structure.

7 is a block diagram showing the cantilever construction method step by step using the cantilever bracket according to the present invention.

2 to 6b, referring to FIG. 7, the cantilever construction method using the cantilever bracket according to the present invention is disposed on the outermost side of the pier but has a certain distance on the upper surface, and the rod-type protrusive muscle 11 is protruded. It is a method of constructing a cantilever of a bridge by applying the cantilever bracket 100 installed to protrude outward on the side of (10).

The cantilever construction method using the cantilever bracket according to the present invention is largely a cantilever bracket manufacturing step (S110), a cantilever bracket assembly installation step (S120), a welding fixing step (S130), and a precast panel seating installation step (S140). , Concrete pouring and curing step (S150) and cantilever bracket bracket separation step (S160).

In detail, the cantilever bracket manufacturing step (S110) is to install and install the precast panel 20 at a predetermined interval in the longitudinal direction on the side of the girder 10 disposed on the outermost side of the pier, and a fixed length. It is provided as an'U'-shaped frame or an'L'-shaped frame, a support frame 110 through which a through hole 111 is formed in the longitudinal center of the vertical portion, and a fixed plate with a fixed bracket 120a welded to an upper surface of one side. (120), one end of the fixed plate 120 is fixed to the welding end from both sides in the width direction, the fixed plate 120, the guide piece 130 is arranged to protrude outward from one side, the fixed bolt 141 and the fixed nut ( It is provided as 142, the support frame 110 based on the fixing plate 120, the pulling means 140 and the girder to be fixed through the fastening force in a state supported in close contact with the protruding muscle 11 of the girder 10 (girder) Once the side is in close contact with the side of the girder 10 so that the side protrudes outward on the side of 10), the upper part is fixedly installed with the fixing plate 130 through bolts (B) and nuts (N), and precast during construction of the cantilever. As the panel 20 is seated, the process of manufacturing the cantilever bracket 100 including the pedestal 150 to support the lower surface of the precast panel 20 is made.

In addition, the cantilever bracket assembly installation step (S120) is assembled so that the cantilever bracket 100 produced through the cantilever bracket manufacturing step (S110) is disposed across the side wall from the upper side of one side of the girder 10. It consists of a process of assembling and installing the pedestal 150 so as to protrude a certain length from the side wall of 10), and assembling and installing a plurality of sets with a predetermined interval in the longitudinal direction of the girder 10.

And the welding fixing step (S130) is a cantilever bracket assembly installation step (S120) through the side wall of the girder 10, the support 150 of the cantilever bracket 100 is assembled and installed to protrude a certain length from the side wall of the girder 10 (110) It consists of a process of welding and fixing in a state in close contact with the upper surface of the guide piece 130 with respect to the bottom of both sides in the width direction.

In addition, the precast panel seating installation step (S130) proceeds after the welding fixing step (S130), and the cantilever bracket assembly installation step (S120) so that the precast panel 20 is successively seated in the longitudinal direction of the girder 10 (S120). It is made through the process of seating each of the precast panel 20 between the neighboring to the pedestal 150 of the bracket 100 for cantilevers installed and assembled through ).

At this time, the precast panel 20 that is seated and installed in the precast panel seating installation step (S130) is applied as a normal precast panel provided as an "L" shaped panel, and in particular, the cantilever bracket 100 ) It is preferable that the recessed grooves 21 are formed at both corners in the longitudinal direction of the end toward the girder 10 side so that there is no interference with the fixed plate 130 portion.

On the other hand, the concrete pouring and curing step (S140) is a precast panel seating installation step (S130) through the precast panel 20 seated and installed on the top surface of the reinforcement (unsigned) in the field after placing the concrete, and then curing the concrete It consists of a process.

At this time, the reinforcing bar (unsigned), as shown in the drawing, it is desirable to reinforce the precast panel 20 so as to be orthogonal to the shear connector (unsigned) protruding on the upper surface.

And the cantilever bracket bracket separation step (S150) is a bolt (B) fixed to be exposed to the outside of the fixed plate 120 and the fixed installation base 150 after curing is completed through the concrete pouring and curing step (S150). It consists of a process of separating the base 150 of the cantilever bracket 100 by releasing the.

In the cantilever construction method using the cantilever bracket according to the present invention made of the above-described processes, in particular, the cantilever bracket assembly installation step (S120) is a cantilever bracket produced through the cantilever bracket manufacturing step (S110) ( 100) from one side of the girder 10 to the side wall over the side wall is assembled and installed so that the pedestal 150 from the side wall of the girder 10 protrudes a certain length, first protruding the support frame 110 to the top of the girder 10 The protruding muscles 11 are disposed to be in close contact with one side.

Then, one side of the top surface of the girder 10 is fixed while having the one end of the pedestal 150 fixed to the other side through the between the protruding muscles 11 with respect to the guide piece 130. It is in close contact with the length so that the other side protrudes a certain length.

Subsequently, in a state in which the fixing bolt 141 and the fixing nut 142, which are the pulling means 140, penetrate the through hole 111 of the support frame 110 and the through hole 121a of the fixing bracket 120a, and fasten each other. While tightening the fixing nut 142, the vertical adhesion plate 153 provided at one end of the main body 151 of the pedestal 150 is in close contact with the side wall of the girder 10.

That is, by the cantilever bracket assembly installation step (S120) made of the above process, the base 150 from the side wall of the girder 10 is assembled and installed to protrude a certain length, in particular the fixing nut of the pulling means 140 ( While tightening 142, the vertical adhesion plate 153 provided at one end of the body 151 of the pedestal 150 can be supported in close contact with the side wall of the girder 10.

After assembling and installing the cantilever bracket through the above-described process, through the welding fixing step (S130) described above, while preventing the flow to the support frame 110, the assembly and installation of the cantilever bracket 100 is more robust. It is possible to maintain the state.

On the other hand, the base 150 of the cantilever bracket 100 produced through the cantilever bracket manufacturing step (S110) in the cantilever construction method using the cantilever bracket according to the present invention consisting of the above-described processes It is preferably made to include (151) and the vertical adhesion plate (153).

At this time, it is preferable that the main body 151 is provided in an H beam type having a predetermined length, and through holes 151a are formed through two rows on one side of the upper horizontal panel portion.

In addition, the vertical adhesion plate 153 is preferably provided on one end of the main body 151 in the form of a vertical plate in close contact with one side of the girder 10.

Of course, the pedestal 150 may simply be provided in an'a' shaped frame.

Moreover, in the cantilever construction method using the cantilever bracket according to the present invention made up of the processes described above, after the cantilever bracket assembly installation step (S120) and welding fixing step (S130) are performed, the main body of the pedestal 150 When the cantilever is installed on the upper surface of the horizontal panel portion located on the upper side of the (151), rubber pads on both sides in the width direction to prevent slipping of the precast panel 20 during the installation and installation of the precast panel 20 on the upper surface It is more preferable that the process of attaching and installing (P) is further performed.

According to the cantilever bracket and the cantilever construction method using the same according to the present invention as described above, the cantilever bracket and the cantilever bracket manufacturing step including the support frame, the fixing plate, the guide piece, the pulling means and the base, assembling the cantilever bracket By applying the cantilever construction method using the cantilever bracket, which includes the installation step, the welding fixation step, the precast panel seating installation step, the concrete pouring and curing step, and the cantilever bracket bracket separation step, the anchor bolt for the anchor bolt on the girder is applied. It is possible to freely select and fix the position in the longitudinal direction of the girder without the need for anchoring, which is the installation process. Through this, the cantilever construction process is simplified to significantly improve the workability.

Moreover, the cantilever bracket and cantilever bracket manufacturing steps including the support frame, fixing plate, guide piece, pulling means and base, assembling and installing bracket for cantilever, welding fixing step, precast panel seating installation step, concrete pouring and curing By applying the cantilever construction method using the cantilever bracket including the step, the cantilever bracket separation step, the pedestal can be separated and reused semi-permanently after construction of the cantilever, thereby significantly reducing construction costs.

Although specific embodiments of the present invention have been described in detail above, the present invention is not limited thereto, and the present invention can be implemented by various persons skilled in the art to which the present invention pertains. Is included in the scope of the present invention.

100: cantilever bracket
110: support frame 111: through
120: fixed plate 121: through
120a: fixing bracket 121a: through
130: Guide section 140: Pulling means
141: fixing bolt 142: fixing nut
150: pedestal 151: main body
151a: through 153: vertical contact plate
P: Rubber pad
B: Bolt
N: Nut
10: girder
11: Extruder
20: precast panel
21: depression groove

Claims (6)

In the bracket 100 for a cantilever for installing a cantilever is provided so as to be projected outwardly on the side of the girder (10) is disposed on the outermost side of the pier formed with a certain distance on the upper surface of the rod-type protruding roots (11),
It is provided in a'U'-shaped frame or a'L'-shaped frame having a predetermined length so as to be closely supported on one side of the protruding muscle 11 protruding to the top of the girder 10 disposed on the outermost side of the pier, the longitudinal direction of the vertical part Support frame 110 through-hole 111 is formed through the center;
It is provided as a plate on a plate, and is provided in an'L' shape in the center of the width direction of one side, and the lower side of the fixing bracket 120a through which the through hole 121a is formed in the center of the vertical portion is fixed by welding, and one side has a fixed length. As much as the width direction of the girder 10 is disposed in close contact with the upper surface on one side, the fixed plate 120 through which the through hole 121 is formed with a predetermined interval in two rows on the other side;
It is provided in a rectangular plate shape so that one side of the fixing plate 121 is sandwiched between the protruding muscles 11 protruding to the upper part of the girder, and one end is fixed plate from both sides in one width direction of the fixing plate 120 (120) a guide piece 130 fixed to the upper surface of one end by welding and fixedly protruding from the side of the fixed plate 120;
A fixing bracket provided on the fixing plate 120 so that the support frame 110 based on the fixing plate 120 is pulled and fixed through a fastening force in a state in close contact with the protruding muscle 11 of the girder 10 Pulling means consisting of a fixing bolt 141 installed through the through hole 121a of the support frame 110 and a fixing nut 142 fastened to the end of the fixing bolt 141 (140); And
Once the side is in close contact with the side of the girder 10 so that it protrudes outward on the side of the girder 10, once the upper surface part is fixedly installed with the fixing plate 120 through bolts (B) and nuts (N), the construction of the cantilever When the precast panel 20 is seated and installed, a bracket for a cantilever comprising a pedestal 150 to support the lower surface of the precast panel 20.
According to claim 1,
The pulling means 140 includes a fixing bolt 141 and a fixing nut 142, while being applied in two or more sets,
The through-hole 111 of the support frame 110 and the through-hole 121a of the fixing bracket 120a correspond to the set of the pulling means 140, and cantilever brackets characterized by being formed through two or more.
According to claim 1,
The pedestal 150 is provided in an H beam type having a predetermined length, and the main body 151 through which the through holes 151a are formed in two rows on one side of the upper horizontal panel portion, and
Bracket for a cantilever is provided on one end of the main body 151 on a vertical plate comprises a vertical adhesion plate 153, one side of which is in close contact with the side of the girder (10).
Construction of the cantilever of the bridge by applying the cantilever bracket (100), which is disposed on the outermost side of the pier and has an interval on the upper surface and is installed so as to protrude outward to the side of the girder (10) with the rod-shaped protruding root (11) protruding. In the cantilever construction method using the cantilever bracket,
For seating and installing the precast panel 20 at regular intervals in the longitudinal direction on the side of the girder 10 disposed on the outermost side of the pier, the'U' shaped frame or'L' shaped frame having a fixed length It is provided as a support frame 110 through which the through hole 111 is formed in the longitudinal center of the vertical portion, the fixing plate 120a fixed to the fixing bracket 120a on one side of the welding surface, one side of the fixing plate 120 It is provided as a guide piece 130, fixed bolt 141 and fixed nut 142, which are fixed by welding at one end from both sides in the width direction and fixedly protruding outward from one side of the fixed plate 120, based on the fixed plate 120 As the support frame 110 is supported in close contact with the protruding muscle 11 of the girder 10, the side of the girder is protruded outward to the side of the pulling means 140 and the girder 10 so as to be pulled and fixed through the fastening force. As it is in close contact with the side of (10), once the upper surface part is fixedly installed with the fixing plate 130 through the bolt (B) and the nut (N), the precast panel 20 is seated and installed during the construction of the cantilever ( 20) a cantilever bracket manufacturing step (S110) of manufacturing a cantilever bracket 100 comprising a base 150 to support the lower surface of the cantilever;
Assembling the cantilever bracket 100 produced through the cantilever bracket manufacturing step (S110) so as to be disposed over the sidewall from the upper side of one side of the girder 10, but the pedestal 150 protrudes a certain length from the sidewall of the girder 10 Assembled and installed, the cantilever bracket assembly installation step (S120) of assembling and installing a plurality of sets at regular intervals in the longitudinal direction of the girder (10);
The guide piece (with respect to the bottom of both sides of the support frame 110) in the width direction of the support frame 110 of the cantilever bracket 100 installed in such a way that the base 150 is protruded a certain length from the side wall of the girder 10 through the assembly installation step (S120) of the cantilever 130) a welding fixing step of welding fixing in a state in close contact with the upper surface (S130);
Proceeding after the welding fixing step (S130), the bracket of the cantilever bracket 100 installed and assembled through the cantilever bracket assembly installation step (S120) so that the precast panel 20 is seated one after another in the longitudinal direction of the girder 10 A precast panel seating installation step (S140) of seating the precast panels 20 between neighbors with respect to 150;
After the precast panel seating installation step (S140) and the reinforcement in the field on the upper surface of the precast panel 20 installed, the concrete pouring and curing step of pouring concrete to cure it (S150); And
After curing is completed through the concrete pouring and curing step (S150), the fixing plate 120 and the fixed bolt (B) exposed to the outside of the fixed installation base (150) are released to release the fixing bolt (B) of the cantilever bracket (100) Cantilever construction method using a bracket for a cantilever, comprising a step of removing the base of the cantilever bracket for separating (S160).
The method of claim 4,
The cantilever bracket assembly installation step (S120) supports the cantilever bracket 100 produced through the cantilever bracket manufacturing step (S110) from the upper side of one side of the girder 10 to the side wall from the side wall of the girder 10. Assemble and install so that 150 is protruding a certain length,
The support frame 110 is disposed to be in close contact with one side of the protruding muscle 11 protruding from the top of the girder 10,
One side of the pedestal 150 is fixed to the other side of the upper surface of the girder 10 while being fitted through the protruding muscles 11 with respect to the guide piece 130 with one end fixed to the other side of the pedestal 150. After the other side is seated to protrude a certain length,
In the state in which the fixing bolt 141 and the fixing nut 142, which are the pulling means 140, penetrate the through hole 111 of the supporting frame 110 and the through hole 121a of the fixing bracket 120a, and then fasten each other. Cantilever using a bracket for a cantilever, characterized in that it consists of a process in which the vertical adhesion plate 153 provided at one end of the body 151 of the pedestal 150 is tightly supported on the side wall of the girder 10 while tightening the 142. Construction method.
The method of claim 4,
Among the cantilever brackets 100 manufactured through the cantilever bracket manufacturing step (S110), the pedestal 150 is provided in an H beam type having a certain length, and has two rows of holes 151a on one side of the upper horizontal panel. The body 151 to be formed through and
A cantilever construction method using a bracket for a cantilever, characterized in that it is provided on one end of the main body (151) on a vertical plate and includes a vertical adhesion plate (153), one surface of which is in close contact with the side of the girder (10).

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