KR101660888B1 - Girder with pressing embed ahchorage apparatus and the girder construction method therewith - Google Patents

Abstract

Type pressurizing device capable of utilizing a more effective compressed PC steel by allowing a reaction force to act as a fusing plate and a fusing plate to be placed in the fixing jacket receiving groove and the hydraulic jack receiving groove so as to be embedded in the upper flange of the structural girder. The present invention relates to a structural girder and a construction method thereof, wherein the buried pressurizing and fixing apparatus is provided with a sheath hole at a central portion spaced apart from a reaction plate to expose a surface of the fixing hole receiving groove to allow a compressed PC steel material to be inserted into the exposed sheath hole A fusing plate serving to resist the concentrated stress due to the fastener to the structural girder; And an intermediate support tube formed between the reaction plate and the fixing plate so that the ends of the reaction plate and the fixing plate are integrated with each other to communicate with the sheath hole so as to resist the compressive stress and the concentrated stress acting thereon.

Description

TECHNICAL FIELD [0001] The present invention relates to a structural girder and a construction method thereof using a buried pressure-

The present invention relates to a structural girder using a buried type pressure-fixing apparatus and a construction method thereof. More specifically, a flush-type pressure-fixing device capable of utilizing a more effective compressed PC steel by acting as a reaction force and a fixing plate in arranging the fixture-receiving groove and the hydraulic jack-receiving groove to be embedded in the structural upper flange, And a method of constructing the same.

Fig. 1A is a view showing the construction of a structural girder according to a conventional bass treing method.

In other words, it can be seen that the structural girder 10 is a PSC girder, and the tension member of the structural girder is fixed to the tension portion (under the neutral axis) by a pretension method or the like after the tension. At this time, Restrictions (strain limitations) Compressive stresses are accumulated in the construction girder compressive section (above the neutral axis) during construction and construction.

If the compressive stress exceeds the permissible compressive stress of the structural girder (the allowable compressive stress of the concrete in the case of the PSC girder), there arises a problem such as compression cracking.

In order to offset the accumulated compressive stress, a compressed PC steel material 20 capable of introducing a tensile stress into the structural girder compression portion is embedded and extended by using a sheath 21 at an upper portion thereof. In the upper portion of the structural girder, And the end of the compressed PC steel member 20 is disposed to penetrate the fixing port receiving groove 30 and the hydraulic jack receiving groove 40.

The compressed PC steel 20 is compressed using the compression jack not shown in the hydraulic jack receiving groove 40 and the compressed PC steel 20 subjected to the compressive stress is fixed to the fixing plate 50 in the fixing port receiving groove 30, And fixing nuts 60 are used.

As the compressive stress applied to the compressed PC steel 20 is restrained, a tensile stress is generated in the upper portion of the structural girder 10 due to the reaction force to cancel the cumulative compressive stress, It becomes possible to construct and construct a structural girder capable of reducing the length of the girder.

In this case, the fuser groove receiving groove 30 and the hydraulic jack receiving groove 40 cause the structural girder to be damaged. However, since the compressed PC steel member 20 can be embedded in the structural girder, It can be said that buckling and twisting do not occur at the time of acting, so that more reliable tensile stress can be introduced.

In order to form the fixing port receiving groove 30, the hydraulic jack receiving groove 40 and the fixing plate 50 on the structural girder in advance, the PVC pipe must be disposed in advance on the structural girder and the fixing plate 50 must be separately installed. There has been a problem in that the workability and workability of the process of installing the fixing port receiving groove 30, the hydraulic jack receiving groove 40, and the fixing plate 50 are inevitably lowered in the process of manufacturing the structural girder.

A conventional structural girder (Patent No. 1356675) using a pressure fixing system is introduced.

1B, the fixing plate 11 is welded and fixed to the upper surface of the upper flange of the steel plate girder (structural girder) 10, and a compressive stress is introduced into the compressed PC steel 20 by using a hydraulic jack The fixing nuts 30 are fixed to the fixing plate 11.

That is, depending on the structural girder, it can be seen that a compression PC steel material 20 can not be installed in the inside of the structural girder, which means that compressed PC steel material 20 is installed outside the structure girder .

However, the fixing plate for the compressed PC steel 20 according to FIG. 1B is limited to be installed outside the steel plate girder.

Further, a conventional composite pressure-fixing apparatus 70 (Patent No. 1561043) according to Fig. 1C is introduced.

That is, the structure is formed such that it is supported by the beam 11 of the structural girder 10 and the stress acting on the composite pressure fixing device 70 is dispersed in the composite pressure fixing device 70.

The compression jack support plates 71 and 72 are installed on the girder fixing plate 73. The compression jack supporting plates are formed in the shape of a vertical plate at the end of the girder fixing plate and are installed so as to contact the cross beams 11 of the structural girder 10 And a pair of intermediate compression book supporting plates 72 spaced apart from each other so as to be received inside the compression jack support plate 71 and extending horizontally from one side of the end compression jack supporting plate 71 .

In order to ensure a sufficient contact area with the side beam 11, the end portion of the compression jack support plate 71 is formed on one side of the compression jack support plate 72 in the form of a vertical plate having the same width as the width of the girder fixing plate 73, And is fixed to the beam 11 with an anchor bolt 75.

The end of the compression jack 74 is supported on the inner side surface of the end portion of the compression jack support plate 71 so that the reaction force R due to the operation of the compression jack 74 using the cross beam 11 of the structural girder 10, Is generated by the compression jack support plate (71).

Furthermore, the intermediate compression jack support plate 72 is compressed between the end compression jack support plate 71 and the intermediate compression jack support plate 72 in the form of a pair of straight plates extending horizontally from one side of the end compression jack support plate 71 Thereby making it possible to secure a space in which the jack 74 is accommodated.

The space in which such a compression jack 74 is received is formed to be spaced apart from both intermediate compression jack support plates 72 so that the compression jack can be received, So that it is located at the central portion of the inner side surface.

When the tensile stress due to the fixing of the PC steel member 80 is transmitted through the fixing plates 76 and 77, the tension is transmitted to the beam 11 via the girder fixing plate 71.

The thickness of the second fixing plate 132 to which the compressed PC steel member 80 is directly fixed is greater than the thickness of the first fixing plate 131.

The both fixing plates 76 and 77 are provided on the girder fixing plate 71 so that the first fixing plate 76 and the first fixing plate 76, which are provided so as to be in contact with the end surfaces of both intermediate compression jack supporting plates 72, And a second fusing plate 77 formed at a horizontally spaced apart position from the second fusing plate 77.

The first fixing plate 76 and the second fixing plate 77 are formed with through holes at a central portion thereof so that the compressed PC steel member 80 can be penetrated.

At this time, both fixing plates 76 and 77 are formed in the shape of a vertical plate having a width larger than the separation distance of the intermediate compression jack supporting plate 72, and the fixing plates 76 and 77 are formed between the first fixing plate 76 and the second fixing plate 77 A fixing plate intermediate support portion 78 is provided.

At this time, the compressed PC steel material 80 is fixed to the second fixing plate 77 by the fixing nuts 79. The tensile stress generated at this time is transmitted to the second fixing plate 77, And is transmitted to the first fixing plate 76 through the second fixing plate 78 so that the tensile stress is dispersed.

The middle plate 78 of the fixing plate is installed on the girder fixing plate 71 so that the end face of the fixing plate abuts between the fixing plates 76 and 77 to transfer the fixing plate from the second fixing plate to the first fixing plate The shape of the circular tube is formed.

The composite concrete 91 is supported by the girder fixing plate 71, the compression jack supporting plates 72 and 73 and the both fixing plates 76 and 75 except for the space where the compressed PC steel member 80 is accommodated and the outer space of the second fixing plate 77. [ , 77) and a fixing plate intermediate support (78) so as to have a constant thickness (T).

However, since the synthesized pressure fixing device 70 is used to use the beam 11 as a kind of reaction force, there is a limitation in the setting of the beam position, and the first fixing plate 76 and the second fixing plate 77 The fusing plate intermediate support 78 and the fusing plate intermediate support 78 may be separately provided to the girder fixing plate 74 when the synthetic concrete 90 is to be separately formed It becomes cumbersome to set a fixed setting.

As shown in FIG. 1A, the fixing groove receiving groove 30 is formed on the upper surface of the structural girder, and the fixing groove receiving groove 30 is formed on the upper surface of the structural girder, And the hydraulic jack receiving grooves 40 are formed so that the compressed PC steel 20 passes through the fixing port receiving grooves 30 and the hydraulic jack receiving grooves 40. In the case of the fixing plate 50, There has been a problem in that it is not suitable to utilize the effective compressed PC steel.

In order to introduce tensile stress into the structural girder compressing part by using the buried pressure-fixing device, the compressive stress is introduced into the tensile part of the structural girder. In order to introduce the tensile stress, A structural girder and a construction method using the buried type pressure fixing device capable of acting as a reaction force band and a fixing plate according to the pressing while reinforcing between the fixing port receiving groove and the hydraulic jack receiving groove and arranged to penetrate the fixing port receiving groove and the hydraulic jack receiving groove The technical challenge is to provide a method.

To this end,

A structural girder in which a buried fixation hole serving as a fixture with a reaction force of a compression jack is previously embedded in an upper flange between a fixing port receiving groove and a compression jack receiving groove so as to offset a compressive stress of the upper portion of the neutral shaft accumulated by the tension member , And the compression PC steel is connected to the intermediate connection groove formed between the fixing hole receiving grooves of the upper flange of the structural girder by using a connecting hole to make a structural girder and then post-insert the compressed PC steel Thereby providing a structural girder using a buried pressure-fixing apparatus.

In addition, preferably, the buried type fastening holes are formed in the shape of a vertical plate, and a sheath hole (H) is formed at a central portion thereof. The surface of the compression fastening hole is exposed in the compression jack receiving groove so that the compressed PC steel can be inserted into the exposed sheath hole. A resilient plate which resists the stress applied to the structural girder while dispersing the compressive stress by the structural girder; A sheath hole is formed at the center portion spaced from the reaction plate to expose the surface of the fixing member receiving groove to allow the compression PC steel to be inserted into the exposed sheath hole and to resist the concentrated stress caused by the fastening member to the structural girder A fusing plate that serves; And an intermediate support tube formed between the reaction plate and the fixing plate so that the ends thereof are integrated with each other to communicate with the sheath hole so as to resist the compressive stress and the concentrated stress acting thereon.

Also preferably,

(a) After the compression PC steels are inserted back into the intermediate connection grooves formed between the fixing port receiving grooves constituting the buried pressure-fixing device, the compressed PC steels are connected to each other by the connecting ports in the intermediate connecting grooves, A step of fabricating a structural girder provided with a buried pressure fixing device manufactured so that a compressive prestress is offset to a tensile stress by a pressure fixing device; (b) installing a structural girder having a buried pressurizing and fixing apparatus manufactured by a tension member by installing a bridge undercarriage including an alternating portion on the bridge undercarriage; (c) grouting material (G) injected into the fixing port receiving groove and the compression jack receiving groove is injected into the intermediate supporting pipe formed with the injection hole and the air hole constituting the embedding type pressure fixing device, ; And (d) installing a slab on the structural girder which is mounted on the bridge substructure. The present invention also provides a method for constructing a structural girder using the buried type pressure-fixing apparatus.

The buried pressure-sensitive fixing device according to the present invention can effectively transmit the compressive stress by the compression means such as the compression jack to the compressed PC steel and is free from the cracking problem caused by the concentration of the stress around the buried pressurizing fixing device, It is possible to provide a structural girder and a construction method thereof using a buried pressurizing and fixing apparatus advantageous to the present invention.

In addition, according to the embedding type pressure fixing apparatus of the present invention, the intermediate connection groove serves as a connecting portion for connecting the compressed PC steel member to the intermediate connection groove, thereby making it possible to insert the compressed PC steel member after the structural girder is manufactured.

Further, according to the buried pressurizing and fixing apparatus of the present invention, the intermediate support tube is in the form of a filled steel pipe by the grouting material G, and more reliable load supporting performance can be ensured.

According to the embedding type pressure-fixing apparatus of the present invention, the intermediate support tube is in the form of a horizontal tube so that both end surfaces thereof are communicated with the reaction plate and the sheath hole (H) of the fixing plate and supported by the reaction plate and the fixing plate So that the upper flange concrete C between the weak reaction plate and the fixing plate can be prevented from being broken.

The upper flange of the structural girder in which the embedding type pressure fixing device according to the present invention is installed is formed as an upper flange having a width greater than the width of the end portion between both ends so as to more effectively secure the rigidity against the bending moment acting thereon Thereby enabling efficient cross-sectional design.

Fig. 1A is a view showing the construction of a structural girder by a conventional bass-treing method,
1B is a structural diagram of a reinforcement device provided on a structural girder which is a conventional steel plate girder;
1C is an installation perspective view of a conventional composite pressurizing device,
FIG. 2A is a structural perspective view of a structural girder equipped with the buried type pressure-
2B is an installation perspective view of the embedding type pressure-
Fig. 2C and Fig. 2D are views showing an example of the structural girder provided with the buried pressurizing and fixing apparatus of the present invention, Fig.
FIGS. 3A and 3B show a flowchart of a method of constructing a structural girder equipped with the buried pressurizing and fixing apparatus of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Structural girder 100 equipped with buried pressure-sensitive fixing device 200 of the present invention]

2B is a perspective view of the buried pressurizing and fixing apparatus 200, and FIG. 2C is a perspective view of the buried pressurizing and fixing apparatus 110 according to the embodiment of the present invention. FIG. 2A is a perspective view of the structural girder 100 equipped with the buried pressure- Fig. 3 is an overall view of a structural girder 100 provided; Fig.

2A, the structural girder 100 equipped with the buried pressurizing and fixing apparatus 200 of the present invention includes an upper flange 110 and a belly 120, The groove 210 and the compression jack receiving groove 220 are formed and the tension member 130 and the compressed PC steel member 230 are disposed.

First, the structural girder 100 is a reinforced concrete girder including a PSC girder or a PSC box girder and formed in an I-shape or a rectangular cross-section as shown in FIG. 2C, and a compressive prestress is introduced by a tension member 130 disposed under the neutral shaft.

This compressive prestress causes the compressive stress to accumulate on the entire section of the structural girder. In particular, the compressive stress accumulating on the neutral axis can cause compressive stress to occur in the structural girder having a small section height, And is canceled by tensile stress by the compression PC steel member 230.

2C, the compression PC steel member 230 is disposed inside the upper flange 110 of the structural girder 100 by using a structural steel bar or the like, and the fastening member receiving groove 210 and the compression jack receiving groove 140 are formed, And then compressed using a compression jack 240, and then fixed.

In the structural girder 100,

As shown in FIG. 2C, the upper flange 110 is formed in the shape of a horizontal plate in a PSC girder having an I-shaped cross section or a box girder having a rectangular cross section, for example, 210 and the compression jack receiving groove 220 are blocked out and the sheath 140 is arranged in advance to receive the compressed PC steel material 230.

Particularly, the upper flange 110 is formed as an upper flange having a width greater than the width of the end portion between the both end portions, so that the rigidity against the bending moment acting effectively can be ensured.

2C, the abdomen 120 is formed of a vertical plate or an inclined plate in a PSC girder or a square box girder having a rectangular cross section, and a tensile member 130 is disposed at the abdomen end, As shown in Fig.

Next, it can be seen that the tension member 130 is used for introducing compressive prestress into a structural girder using a PC strand or the like, and is fixed after being strained by the fixing member at both ends of the girder of the structural girder 100. This compressive prestress introduces a tensile stress due to the compressive PC steels in order to offset the compressive stresses accumulated on the structural girder upstream (above the neutral axis).

Next, the sheath 140 is formed horizontally over the entire length L of the structural girder inside the upper flange of the structural girder 100 so that the compressed PC steel 230 is moved from the outside of the structural girder 100 So that it can be inserted and installed inside.

Next, the horizontal hole 150 is formed at the side of the upper flange in advance in the embedding or fabrication, so that the compressed PC steel material 230 or the work table 400 can be installed later.

The buried pressurizing and fixing apparatus 200 includes the fixing port receiving groove 210, the compression jack receiving groove 220, the compressed PC steel 230, the compression jack 240, the buried type fixing unit 250, 260 and an intermediate connection groove 270. [

First, the compression jack receiving groove 220 is formed as a block-out groove formed to open at an upper portion of the upper flange 110 of the structural girder 100. The compression jack receiving groove 220 is formed to accommodate the compression jack 240, It can be seen that the sheath 140 is formed to penetrate from the side surface.

The fixing port receiving groove 210 is formed at a central portion of the structural girder 100 so as to be spaced apart from the compression jack receiving groove 220. The fixing groove receiving groove 210 is formed in the central portion of the structural girder 100, And receives a fastener 260 for fixing the PC steel material 230 to the fixing plate 252 after compression.

The compressed PC steel 230 may be a structural steel bar inserted into the sheath 140 to offset the compressive stress accumulated on the upper surface of the structural girder 100. The compressive PC steel 230 may be inserted into both the compression jack receiving grooves 220 of the structural girder, (L1 < L) so that the ends of the end portions are exposed.

The connector 231 can connect the compressed PC steel 230 in the intermediate connection groove 270 formed in the upper flange of the structural girder 100 between the fixing hole receiving grooves 210 .

As shown in FIG. 2B, the intermediate connecting groove 270 is formed as a connecting portion of the compressed PC steel member 230 in the intermediate connecting groove 270, and then the compressed PC steel member 230 is inserted And the like.

The compressed PC steel 230 inserted into the sheath 140 via the fixing port receiving groove 210 and the intermediate connecting groove 270 is exposed to the compression jack receiving groove 220 so that the compression jack 240 And is fixed to the fixing plate 252 of the buried type fixture 250 by the fastener 260 so that the tensile stress is introduced into the upper surface of the structural girder.

The compression jack 240 may be a hydraulic jack and inserted in the compression jack receiving groove 220 to compress the compressed PC steel 230 by supporting the back surface of the compression jack receiving groove 220.

The buried type fixing unit 250 is formed in advance in the upper flange 110 between the fixing member receiving groove 210 and the compression jack receiving groove 220 as shown in FIG. 2B, and includes a reaction plate 251, a fixing plate 252, And an intermediate support pipe (253).

The reaction plate 251 is a vertical plate having a central portion formed with a sheath hole H and having a predetermined thickness to expose the front surface A2 of the compression jack receiving groove 220, Is also exposed.

So that the compressed PC steel material 230 can be inserted into the sheath hole H, and the compressive stress caused by the compression jack 240 is dispersed in the structural girder while being resistant to the stress.

The fusing plate 252 is a vertical plate having a predetermined thickness and spaced apart from the reaction plate 251 and having a central portion H and a surface A4 is exposed on the rear surface of the fusing unit receiving groove 210 The sheath hole (H) is also exposed.

So that the compressed PC steel material 230 can be inserted into the sheath hole H and the concentrated stress caused by the fastener 260 is dispersed in the structural girder and resisted.

The upper flange concrete C between the reaction plate 251 and the fusing plate 252 is in contact with the upper surface of the fixing plate 252 because the compressive stress and the concentrated stress acting on the reaction plate 251 and the fixing plate 252 are opposite to each other It becomes very vulnerable.

Accordingly, the present invention can prevent the compression stress and concentrated stress, which are connected to each other by the intermediate support pipe 253 between the reaction plate 251 and the fixing plate 252, The intermediate supporting pipe 253 serving as a supporting member for supporting the reaction force is formed integrally between the reaction plate 251 and the fixing plate 252.

The middle support pipe 253 is in the form of a horizontal tube so that both end surfaces are in communication with the reaction plate 251 and the sheath hole H of the fixing plate 252 and are reinforced with the reaction plate 251 and the fixing plate 252 (254).

That is, the upper flange concrete C between the fragile reaction plate 251 and the fusing plate 252 is not broken by the reinforcing pieces 254.

The injection hole 255 and the air hole 256 are formed in the intermediate support pipe 253 and the grouting material G injected into the fixing hole receiving groove, The intermediate support pipe 253 is in the form of a filled steel pipe so that a more reliable load supporting performance can be ensured.

The fastening tool 260 serves to fix the compressed PC steel 230 to the fusing plate 252. The fastening tool 260 may be fixed using a fixing nut fastened to a thread formed on the outer circumferential surface of the compressed PC steel 230, And the compression PC steel material 230 is fixed to the plate to generate a tensile stress in the form of a reaction force.

2A, the intermediate connection groove 270 may have a connecting port such as a coupler for connecting the compressed PC steel members 230 having a limited length to each other while increasing the extension length L1 of the compressed PC steel member 230, So that they can be formed together when the structural girder 100 is manufactured.

The intermediate connection groove 270 serves to restrain the compression PC steel 230 while it is being buried in the future so as to prevent the squeezing or the like and to provide an important function for inserting the compressed PC steel 230 into the sheath 140 I have.

2C, the structural girder 100 is formed of a PSC girder having an I-shaped cross-section, and the upper portion of the PSC girder having an I-shaped cross section, It can be seen that the buried pressurizing and fixing apparatus 200 as seen in the flange is formed at both ends of the structural girder 100.

In this embedding type pressure fixing device 200, the compressed PC steel material 230 is horizontally extended in the longitudinal direction of the structural girder 100 by the sheath 140 and is compressed by the compression jack so that tensile stress is applied to the structural girder (100).

Also, it can be seen that the compressed PC steels 230 are installed to be connected to each other through the connecting holes 231 in the intermediate connecting grooves 270 and can be installed after the compressed PC steels 230 are inserted. 210, the compression jack receiving groove 220 and the intermediate connecting groove 270 are finished with the grouting material G. [

2C and FIG. 2D, the structural girder 100 is formed of a box girder having a rectangular cross section, and the structural girder 100 is provided on the upper flange of the box girder. It can be seen that the flush-type pressure-fixing apparatus 200 as described above is formed at both ends of the structural girder 100. Further, if necessary, the buried pressure-fixing apparatus 200 may be additionally provided at the girder L / 4 point.

In this embedding type pressure fixing apparatus 200, the compressed PC steel material 230 is horizontally extended in the longitudinal direction of the structural girder 100 by the sheath 140 and is compressed by the compression jack, So as to be generated in the upper part of the girder 100.

It can be seen that the compressed PC steels 230 are installed to be connected to each other through the connecting hole 231 in the intermediate connecting groove 270. The fixing hole receiving groove and the compression jack receiving groove and the intermediate connecting groove are finished with the grouting material G .

In particular, when the embedding type pressurizing and fixing apparatus 200 of the present invention is used for a box girder, the mold height can be minimized.

[Method of constructing structural girder (100) equipped with buried pressure-fixing device]

3A and 3B show a flowchart of a method of constructing the structural girder 100 equipped with the buried type pressure-fixing apparatus of the present invention. This is based on single span bridges.

3A, the bridge substructure 300 including the alternation is constructed. In the bridge substructure 300, the structural girder 100 having the buried pressurizing and fixing apparatus 200 as shown in FIG. .

That is, the structural girder 100 equipped with the buried pressure-fixing apparatus 200 is manufactured, and the compression prestress is introduced by the tension member 130.

At this time, the compressed PC steel material 230 is inserted into the intermediate connection groove 270 formed between the fixing port receiving grooves 210 constituting the buried pressure-fixing device 200, The compressed PC steels 230 are connected to each other by the connecting ports 231 so that the compressive prestress is compensated for by the tensile stress by the buried pressurizing and fixing apparatus 200 by the tension member 130.

The grouting material G injected into the fixing port receiving groove and the compression jack receiving groove is formed in the intermediate supporting pipe 253 having the injection hole 255 and the air hole 256 constituting the buried pressure- So that the intermediate support pipe 253 serves as a filled steel pipe.

3A, it can be seen that the structural girder 100 equipped with the buried pressurizing and fixing apparatus is structured such that a structural girder having two buried pressurizing and fixing devices extending in the longitudinal direction is mounted.

It can be seen that a workbench 400 for installing the cantilever portion is provided at the outmost side of the structural girder provided with such a buried pressure-fixing apparatus.

It can be seen that the worktable 400 is assembled so that the vertical jig 420 to which the horizontal jig 410 is connected is fixed to the horizontal hole 150 formed in the upper flange. At this time, it is understood that the horizontal jig 410 and the vertical jig 420 are installed in a lattice form.

The lower portion of the vertical jig is fixed to the lower portion of the lower portion of the structural girder 100 by means of a connecting rod, and the upper portion can be stably installed on the upper flange by the fixing plate 430.

The fixing plate 430 supports the work table by a connecting bolt connected to the upper end of the vertical jig 420 on the upper surface of the upper flange 110 and the fixing plate 430 is fixed to the connection reinforcing bar 440 extending from the upper flange So as to be fixedly installed. Thus, it is possible to more reliably support the workbench.

The vertical jig 420 to which the horizontal jig 410 is connected is supported by the inclined connection unit 450 so that the applied load is dispersed and supported. The upper and lower ends of the inclined connection unit 450 are connected to one of the horizontal jig and one of the fixing holes of the vertical jig So as to be installed in consideration of size and the like.

The horizontal jig 410 is spaced apart from the upper flange of the structural girder 100 in the longitudinal direction so that a bottom plate is further formed on the upper surface of the structural girder 100 and a rail is further installed on the outer side.

Further, since the horizontal holes 150 are formed in the upper flanges of the respective structural girders 100, a fixing base (not shown) is further provided thereon, and a tension for maintenance is further provided in the fixing base, And it is possible to make it available for additional installation of a supporting stand including a tramway.

As shown in FIG. 3B, it can be seen that the bridge can be completed by installing the slab 500 on the structural girder 100.

The structural girder 100 equipped with the buried pressurizing and fixing apparatus 200 is also a structural girder which is an upper flange or a box girder of a box section formed on an I-shaped section PSC girder and is used for a short-span or multi-span bridge.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Structural girder
110: upper flange 120: abdomen
130: Tension material 140: Sheath
150: Horizontal hole 200: Buried pressure-fixing device
210: Fixer port receiving groove 220: Compression jack receiving groove
230: Compressed PC steel 240: Compression jack
250: Landfill type anchorage
251: Reaction plate 252: Fixation plate
253: intermediate support pipe 254: reinforcement piece
255: injection hole 256: air hole
260: fastener 270: intermediate connection groove
300: Bridge infrastructure 400: Workbench

Claims (10)

In order to offset the compressive stress of the upper portion of the neutral shaft accumulated by the tensile material by the tensile stress, the upper flange between the fixing port receiving groove 210 and the compression jack receiving groove 220 is provided with a buried fixation port 250) are previously embedded in the structural girder (100)
The structural PC girder 230 is connected to the intermediate connection groove 270 formed between the fixing hole receiving grooves 210 of the upper flange of the structural girder 100 by using the connecting hole 231 to manufacture the structural girder 100 The compressed PC steel material 230 can be inserted backward,
The buried type fixing unit 250 is formed in the shape of a vertical plate and has a central portion formed with a sheath hole H so that the compressed PC steel material 230 can be inserted into the exposed sheath hole by exposing the surface thereof to the compression jack receiving groove 220 A reaction force plate 251 which resists the compressive stress caused by the compression jack 240 while dispersing the compressive stress on the structural girder; A sheath hole is formed at the central portion spaced apart from the reaction force plate 251 to expose the surface of the fastening hole receiving groove 210 so that the compressed PC steel material 230 can be inserted into the exposed sheath hole, A fusing plate 252 serving to resist the concentrated stress caused by the stress applied to the structural girder; And an intermediate support pipe (253) formed between the reaction plate (251) and the fixing plate (252) so as to function to resist a compressive stress and a concentrated stress, Wherein the intermediate support tube (253) is supported on the reaction plate (251) and the fixing plate (252) by a reinforcing piece (254). The method according to claim 1,
The compressed PC steel 230 is inserted through the sheath 140 formed over the extension length of the structural girder and is inserted into the sheath groove 210 of the fastening hole receiving groove 210 H). &Lt; / RTI &gt; delete 3. The method according to claim 1 or 2,
Wherein the buried type fixing unit 250 is installed at an end portion of an upper flange formed in an I-shaped cross-section PSC girder or an upper flange formed in a box girder of a cross section of a box. 3. The method according to claim 1 or 2,
The grouting material G injected into the fixing port receiving groove and the compression jack receiving groove is injected into the intermediate supporting pipe 253 in which the injection hole 255 and the air hole 256 of the buried type fixing port 250 are formed, And the support pipe (253) becomes a filled steel pipe. The method according to claim 1,
A horizontal hole 150 is further formed on a side surface of the upper flange 110 so that the work table 400 or the temporary support table can be fixed,
The vertical jig 410 is fixed to the horizontal hole 150 so that the horizontal jig 410 and the vertical jig 420 are installed in a lattice form Structural girders using buried pressurized anchoring devices. The method according to claim 6,
The lower part of the vertical jig 420 is fixed to the lower part of the lower part of the structural girder 100 by means of a connecting rod and the upper part is installed on the upper surface of the upper flange by a fixing plate 430,
The fixing plate 430 supports the work table 400 by connecting bolts connected to the upper end of the vertical jig 420 on the upper surface of the upper flange 110 and the fixing plate 430 supports the connection reinforcing bars 440,
The vertical jig 420 to which the horizontal jig 410 is connected is supported by the inclined connection unit 450 so that the load is dispersed and supported. The upper and lower ends of the inclined connection unit 450 are connected to one of the horizontal jig and one of the fixing holes of the vertical jig Respectively, in the longitudinal direction of the structural girder. (a) The compressed PC steel material 230 is inserted back into the intermediate connecting groove 270 formed between the fixing port receiving grooves 210 constituting the buried pressure-fixing device 200 to form the intermediate connecting groove 270, In which the compressed PC steels 230 are connected to each other by the connecting ports 231 so that the compressive prestresses can be canceled by the pressure fixing device by the tension members 130. [ Fabricating the girder (100);
(b) placing a structural girder (100) equipped with a buried pressurizing and fixing apparatus (200) manufactured by a tension member (130) on the bridge substructure (300) by installing a bridge substructure (300) step;
(c) grouting material G injected into a fixing port receiving groove, a compression jack receiving groove, and the like in an intermediate support pipe 253 having an injection hole 255 and an air hole 256 constituting the embedding type pressure- So that the intermediate support pipe 253 becomes a filled steel pipe; And
(d) installing a slab on top of the structural girder (100) mounted on the bridge substructure (300)
The buried fixture 250 in the step (a) is formed in a vertical plate shape and has a sheath hole H formed at the center thereof. The compressed PC steel material 230 is inserted into the exposed sheath hole by exposing the surface thereof to the compression jack receiving groove 220. And a resilient plate 251 which resists the compressive stress caused by the compression jack 240 while dispersing the compressive stress on the structural girder. A sheath hole is formed at the central portion spaced apart from the reaction force plate 251 to expose the surface of the fastening hole receiving groove 210 so that the compressed PC steel material 230 can be inserted into the exposed sheath hole, A fusing plate 252 serving to resist the concentrated stress caused by the stress applied to the structural girder; And an intermediate support pipe (253) formed between the reaction plate (251) and the fixing plate (252) so as to function to resist a compressive stress and a concentrated stress, Wherein the intermediate support pipe (253) is supported on the reaction plate (251) and the fixing plate (252) by a reinforcing piece (254). 9. The method of claim 8,
The structural girder 100 equipped with the buried pressurizing and fixing apparatus 200 in the step (a) is provided with at least one upper flange on an upper flange formed on an I-shaped section PSC girder or on an upper flange formed on a box girder of a box section A structural girder equipped with a buried pressurizing and fixing apparatus, wherein the structural girder is mounted on a short-span or multi-span bridge. delete

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