KR102059631B1 - Support device for girder that can accommodate displacement for installation error and accommodate displacement when slab concrete is poured and constructing method rahmen bridge using the same - Google Patents

Abstract

Disclosed is a support device for a girder, capable of allowing only a small moment or preventing a moment at an end until the placement of a slab by using a screw steel bar installed on a connection member; and adjusting a position horizontally or vertically to recover an error in the construction of an abutment or an error in the manufacture of a girder or connection part. To achieve the purpose, the support device includes: a support box having a hollow hole and an open upper part; an assembly part installed between the support box and an abutment to fix the support box to the abutment; a displacement accommodation support part installed in the upper part of the support box and supporting an upper girder to adjust the height and angle of the upper girder depending on a position attached to the lower part of the upper girder; a hinge rod assembled with the support box in a width direction of the upper girder; a rotary rod including a through hole formed at an end to be inserted into the hinge rod to be able to be rotated around the hinge rod and a spiral part installed at the other end opposite to the end and inserted into the lower part of the upper girder; and a conduction prevention nut combined with the spiral part of the rotary rod and attached to the upper girder to keep the upper girder attached on the displacement accommodation support part. According to the present invention, the support device is capable of correcting horizontal and vertical construction errors during the installation of a girder, and accommodating vertical displacement, horizontal displacement and rotational displacement during the placement of slab concrete, thereby improving construability and safety.

Description

SUPPORT DEVICE FOR GIRDER THAT CAN ACCOMMODATE DISPLACEMENT FOR INSTALLATION ERROR AND ACCOMMODATE DISPLACEMENT WHEN SLAB CONCRETE IS POURED AND CONSTRUCTING METHOD RAHMEN BRIDGE USING THE SAME}

The present invention relates to a support device for the girder for connecting and supporting the upper girder to the wall in the ramen bridge using the girder as a superstructure and a construction method of the ramen bridge using the same, more specifically, installed in the connection member Supporting device for girders and ramen using them to adjust the position for repairing errors and alternating construction errors in the horizontal and vertical directions by using screw steel rods, and to prevent the moment from occurring at the end until slab casting It is about construction method of school.

The plan height of the bridge is determined in consideration of the relevant specification regulations and local conditions at the design stage, but civil complaints are generated when the building becomes lower than the bridge height due to the linear change of access roads, the increase in the flood level, the private house, etc. The height of the bridge may change frequently during construction. Such changes in the planned height of the bridge can be made before the wall, which is the substructure, is to be removed and rebuilt after the construction is completed.

In the ramen bridge used as the superstructure of the girder, the part involved in the planned height of the bridge is the wall and the supporting steel or the connecting steel (hereinafter referred to as 'connection member'). This connecting member is required to connect or mount the upper girder on the wall, and is ordered at the beginning of the construction is made before the wall with the upper girder.

The connecting member is cut and assembled in a factory having automatic welding and cutters in steel of H-shaped or I-shaped cross section, and in particular, it is not permitted to cut steel in the field for structural purposes.

Therefore, when the planned height is changed during construction in the conventional ramen bridge, it is required to reconstruct not only the wall but also the connecting member.

In addition, in the conventional ramen bridge, the wall and the connection member are sensitive to construction errors, and are often rebuilt, and economic losses are often caused to solve them.

Since the capacity of ready-mixed concrete ready-mixed concrete is 6m3, it is difficult to accurately order the capacity for the primary pouring height of the wall, so most of the over-ordering is executed, thereby increasing unnecessary cost and construction waste. If the primary pouring height cannot be adjusted due to construction errors and errors, it is inevitable to modify the connecting member and increase construction cost and air as described above.

Since the first pouring height is changed in the cross section by the lateral gradient of the bridge and the resulting step, construction errors and errors are frequently caused.

Among the problems of the conventional ramen bridge described above, instead of the H- or I-shaped connecting member that cannot be modified according to the change in the field, when a wire member such as a steel bar or an angle steel that can be cut in the field is used as the connecting member, It is difficult to use as a structural member because of problems in stability and safety.

Here, when the buckling is applied to a long and straight member, when the compressive force is applied, the buckling is contracted like a rod subjected to the compressive force when the magnitude of the load is small, but when the magnitude of the load exceeds a certain value, a large bending occurs in the transverse direction and becomes unstable. The load at the moment when this bending occurs is called the critical load or Euler buckling load.

This buckling load depends on the flexural stiffness, length, boundary condition of both ends, initial deflection (displacement), load eccentricity, etc.The smaller the flexural rigidity of the member, the longer the length, and the weaker the constraint of the boundary condition (The larger the effective length coefficient), the larger the initial deflection (displacement), and the larger the eccentricity of the load, the smaller the buckling load.

As the buckling load decreases as described above, the buckling occurs due to the compressive force that is less than the strength of the actual member. If the buckling is not considered in the design stage, sudden collapse occurs, and the recent occurrence of slab collapse is also a result of the lack of horizontal and inclined members that suppress horizontal displacement of the copper bar that supports the slab. .

Since the connecting member supports the upper girder at the free end with no restraint, the effective length factor must be large. In such a state, the buckling occurs when the wire member with considerably smaller flexural stiffness is used compared to the I- or H-shaped cross section. There is a big concern. In addition, as the connecting member bears the vertical load acting on the upper girder and the rotational displacement and the horizontal displacement caused by the temperature change, the connecting member is not simply a compression member, but becomes a bending-compression member having an initial horizontal displacement. Buckling is inevitable.

Furthermore, when using wire members such as steel bars or angular steel that can be cut in the field instead of the conventional supporting steel or connecting steel connecting members, they may be destroyed by small compressive forces due to the initial horizontal displacement caused by the temperature change acting on the upper girder. It is easy to support the upper girder in the state where the upper part of the wire member is not restrained, so the effective length factor is large, which further reduces the resistance to breakage, and due to the rotational displacement of the upper girder end due to the vertical load of the upper girder. It is difficult to secure structural safety because the bending deformation of the wire member is further increased.

Therefore, in the case of the conventional Ramen Bridge, if the planned height of the bridge is changed in design due to civil complaints caused by the linear change of the access road during construction, the increase in the flood level, the private house, etc. If the wall height is incorrectly constructed due to construction errors and errors, reconstruction of the wall and the connecting member is required, thus increasing construction cost and air. In addition, as the connecting member bears the rotational load and the horizontal displacement caused by the vertical load acting on the upper girder and the temperature change, the connecting member becomes a bending-compression member having a horizontal displacement instead of a compression member. Have.

As a technology of the background of the present invention, as a Korean Patent Registration No. 10-1704971, 'a support device and a ramen bridge using the same to control the installation height of the upper girder and to prevent displacement and fall prevention during construction are proposed. have. The support device includes a plurality of threaded steel rods, a pair of support nuts screwed into an upper portion of the threaded steel rods, and inserted into the threaded steel rods and supported on the pair of support nuts to adjust the position of the pair of support nuts. As the height is adjusted according to the displacement receiving plate supporting the upper girder, a fixing nut fastened to the screw steel bar to fix the displacement receiving plate, and the upper part of the screw steel bar to fasten the screw steel bar and the upper girder An assembled fall prevention nut and an upper washer, an elastic plate installed between the upper washer and the lower flange of the upper girder to accommodate rotational displacement generated during rotation of the upper girder, and the elastic plate inserted into the threaded steel bar. And a sliding upper plate and a sliding lower plate installed between the upper flange and the lower flange of the upper girder to accommodate horizontal displacement. All.

However, such a supporting device has to withstand the weight of the upper girder and the weight of the bottom plate of the plurality of threaded steel bars, but the sectional area may be insufficient, causing buckling. That is, the vertical stress of the threaded steel bar is generated as the ratio of the upper load / cross-sectional area, but because of the small cross-sectional area, high vertical stress is generated, and the longer the length of the threaded steel bar, the greater the possibility of buckling and the risk of conduction increases.

In addition, the use of sliding plates and elastic plates for rotational displacement causes chemical reactions to corrode when the concrete hardens, causing the elastic plates to corrode, resulting in further deformation.

Therefore, there is a need to develop a supporting member using less materials other than concrete and steel, and using a H-type or I-shaped connection member having a rigidity and a larger cross-sectional area than a screw rod.

Republic of Korea Patent No. 10-1704971 (2017.02.10 announcement) Republic of Korea Patent No. 10-1431640 (August 20, 2014 announcement) Republic of Korea Patent Registration No. 10-1809166 (announced Dec. 15, 2017)

Accordingly, the first object of the present invention is to correct the construction error in the horizontal and vertical direction when installing the pre-fabricated upper girders on the wall, and to install the upper girder and then to the horizontal, vertical and rotary motions when placing the slab It is possible to accommodate, and to provide a supporting device for the girder that can reduce the moment transmitted to the lower base by reducing the bending moment generated in the end corner as possible.

In addition, a second object of the present invention is to correct the construction error of the horizontal and vertical when installing the upper girder, using a girder support device that can accommodate the vertical displacement and horizontal displacement and rotational displacement during slab concrete placement It is to provide the construction method of the ramen bridge.

In order to achieve the first object of the present invention described above, in one embodiment of the present invention, in the girder support device is installed in the upper portion of the alternator is mounted on the upper girder, the upper portion of the alternator is formed hollow and formed Is installed between the support box and the support box and the alternating opening, and the assembly portion for fixing the support box to the shift, the height of the upper girder in accordance with the position provided in the upper portion of the support box and in close contact with the lower portion of the upper girder Displacement receiving portion for supporting the angle and the adjustment, the hinge rod is assembled to the support box in the width direction of the upper girder, and the through-hole is coupled to the hinge rod to be rotated around the hinge rod at one end Is formed and the other end opposite the one end is provided with a spiral portion, the spiral rod is fitted to the lower portion of the upper girder, and the upper girder It provides a support device for the girder comprising a fall prevention nut coupled to the spiral portion of the rotating rod to be in close contact with the displacement receiving portion and in close contact with the upper girder.

In addition, in order to achieve the second object of the present invention, in one embodiment of the present invention, the substructure construction step of embedding the anchor bolt in the alternation, and installing the support box provided with a displacement receiving support portion on top of the anchor bolt For the girder comprising a connecting member installation step, an assembly step of assembling the hinge rod and the rotating rod in the interior of the support box, and the upper girder installation step of installing the upper girder on the upper portion of the displacement receiving base and adjusting the horizontal and vertical positions Provides the construction method of the ramen bridge using the support device.

According to the present invention, it is possible to correct the construction error of the horizontal and vertical when installing the girder, and can accommodate the vertical displacement and the horizontal displacement and rotational displacement during the slab concrete installation, thereby improving the workability and safety.

In addition, the present invention can reduce the moment transmitted to the lower base by reducing the bending moment generated in the end corner as possible, thereby reducing the cross-section of the foundation and can also reduce the number of piles need to be installed.

In addition, the present invention does not reduce the buckling load unlike the conventional pillar member because the displacement receiving portion receives all the horizontal displacement caused by the temperature change of the upper girder.

And by receiving the rotational displacement of the upper girder end with respect to the vertical load of the upper girder to prevent the bending deformation of the support box to improve the structural stability.

1 is an exploded perspective view for explaining the support device for the girder according to the present invention.
2 is a cross-sectional view showing a steel girders provided with a girder support device according to the present invention.
3 is a plan view for explaining the support device for the girder according to the present invention.
4 is a plan view illustrating the steel girder of FIG. 2 cut in the horizontal direction.
5 is a cross-sectional view showing a rigid composite girders provided with a support device for girders according to the present invention.
FIG. 6 is a plan view illustrating the rigid girder of FIG. 4 cut in the horizontal direction. FIG.
Figure 7 is a cross-sectional view showing a prestressed concrete girder with a support device for girder according to the present invention.
8 is a plan view illustrating the prestressed concrete girder of FIG. 6 cut in the horizontal direction.
9 is a perspective view showing an embodiment of the displacement receiving portion according to the present invention.
10 is a perspective view showing another embodiment of the displacement receiving portion according to the present invention.
11 is a perspective view showing an embodiment of a rotating rod according to the present invention.
12 to 14 is a schematic diagram showing a change in contact point according to the movement of the upper girder.
15 and 16 are flowcharts for explaining the construction method of the support device for the girder according to the present invention.

Hereinafter, with reference to the accompanying drawings, a support device for girder capable of accepting a displacement for correcting errors during installation according to preferred embodiments of the present invention and a displacement when placing slab concrete (hereinafter, referred to as `` girder support device '') And the construction method of the ramen bridge using the same.

1 is an exploded perspective view for explaining the support device for the girder according to the present invention, Figure 2 is a cross-sectional view showing a rigid composite girders provided with the support device for the girder according to the present invention, Figure 3 is a support for the girder according to the present invention. It is a top view for demonstrating an apparatus.

1 to 3, the support device for the girder according to the present invention is installed on the upper portion of the shift 20 to the upper girder 10 is mounted, the support box 100 is installed on the upper portion of the shift 20 ), An assembly part 200 for fixing the support box 100 on the shift 20, and a displacement accommodating support part provided at an upper portion of the support box to support the height and angle of the upper girder 10 to be adjusted. (300), the hinge rod 400 is assembled to the support box to provide a rotating shaft, the rotating rod 500 coupled to the hinge rod 400 to be rotated around the hinge rod 400, and It includes a fall prevention nut 600 for coupling the rotary bar 500 to the upper girder 10. At this time, the support box 100 is a configuration for supporting the weight of the upper girder 10 between the alternating 20 and the upper girder 10, the displacement receiving portion 300 and the hinge rod 400 and the rotating rod ( 500 is a configuration for accommodating the horizontal displacement and vertical displacement and rotational displacement acting from the upper girder 10.

The supporting device for the girder may be installed at both ends of the upper girder 10 when the bridge is short span, and may be installed at the center of the upper girder having a similar cross section connecting the adjacent upper girder 10 in the case of multi span. Can be.

Figure 4 is a plan view showing the steel girders of Figure 2 cut in the horizontal direction, Figure 5 is a cross-sectional view showing a rigid girder with a support device for girders according to the invention, Figure 6 is a cross-sectional view of Figure 4 It is a top view which shows a composite girder, FIG. 7 is sectional drawing which shows the prestressed concrete girder in which the support device for girder which concerns on this invention was installed, FIG. 8 is a top view which shows the prestressed concrete girder of FIG. 6 cut | disconnected in the horizontal direction.

Here, the upper girder 10 may be any one of a steel composite girder, a steel girder and a prestressed concrete girder as shown in FIGS. 4 to 8, but is not limited thereto.

The composite girder is a combination of steel and concrete and preflex girder and prestressed steel composite girder can be introduced a predetermined linear compressive stress, the steel girder is a girder only steel It comprises an I-BEAM and a plate girder (Steel plate girder). In addition, the prestressed concrete girder comprises a girder made of concrete, a predetermined linear compression force is introduced.

Such a composite girder, steel girder, etc., the support device according to the present invention is connected to the lower flange of the girder, the prestressed concrete girder is attached to the steel plate installed attached to the bottom of the girder.

Hereinafter, each component will be described in more detail with reference to the accompanying drawings.

1 to 3, the support device for girder according to the present invention includes a support box (100).

The support box 100 is to provide a space for the displacement receiving portion 300, the hinge rod 400 and the rotating rod 500 is installed between the shift 20 and the upper girder 10, shift 20 Installed at the top of the hollow is formed and the top is opened.

In detail, the support box 100 may include a main body 110, first and second side plates 120 and 130, and a bottom plate 140.

The body 110 is formed of H-shaped steel or I-shaped steel so as to support the upper girder 10 having a weight of several tens to hundreds of tons as shown in Figs. In this case, a first through hole through which the hinge rod 400 penetrates may be formed in the central portion of the main body 110.

The first side plate 120 is provided on the left side of the main body 110 to cover the left side of the main body 110 on the basis of the longitudinal direction of the upper girder 10, the hinge rod 400 is the upper girder Provides a space in which the hinge rod 400 is assembled so as to be assembled to the support box 100 in the width direction of the (10). To this end, the first side plate 120 has a second through hole through which the hinge rod 400 penetrates on the same horizontal line as the first through hole. The first side plate 120 together with the main body 110 formed of the H-shaped steel or the I-shaped steel provides a space in which the displacement receiving portion 300 can be stably installed.

The second side plate 130 is provided on the right side of the main body 110 to cover the right side of the main body 110, the hinge rod 400 is assembled to the support box 100 in the width direction of the upper girder 10. The hinge rod 400 provides a space to be assembled. To this end, the second side plate 130 has a third through hole through which the hinge rod 400 penetrates on the same horizontal line as the first through hole and the second through hole. The second side plate 130 together with the main body 110 formed of the H-shaped steel or the I-shaped steel provides a space in which the displacement receiving base 300 can be stably installed.

As shown in FIG. 1, the bottom plate 140 covers the lower ends of the body 110, the first side plate 120, and the second side plate 130, and the main body 110, the first side plate 120, and the second side plate 130. It is provided at the bottom of the), to provide a space in which the assembly unit 200 is installed. To this end, the base plate 140 is formed with a plurality of assembling holes through which the anchor bolt 210 of the assembly unit 200 to be described later. In addition, the base plate 140 may be configured as a flat panel such that the mortar layer 230 of the assembling unit 200 to be described later may be formed to have a uniform thickness.

The main body 110, the first side plate 120, the second side plate 130 and the bottom plate 140 may be separately manufactured and then formed as a single body through welding or the like, or may be integrally manufactured through an injection mold or the like. It may be.

1 to 3, the support device for the girder according to the present invention includes an assembly 200.

The assembly unit 200 is installed between the support box 100 and the shift 20 to fix the support box to the shift 20. If such a purpose can be achieved, any fastening device may be used.

As a specific aspect, the assembly 200 according to the present invention is an anchor that the lower end is installed in the alternating 20 as shown in Figure 2 and the upper end is protruded to the top of the bottom plate 140 through the bottom plate 140. The bolt 210, the fixing nut 220 is coupled to the upper portion of the anchor bolt 210 to secure the bottom plate 140, and the bottom plate 140 to adjust the height and angle of the upper girder 10. And a mortar layer 230 that is poured between the alternate 20.

The number of anchor bolts 210 may vary depending on the size of the bottom plate 140, but it is preferable that a total of four anchor bolts 210 are installed one by one at the vertex portion of the bottom plate 140.

Since the fixing nut 220 is provided for each anchor bolt 210, it is preferable that the fixing nut 220 is provided in the same number as the anchor bolt 210.

It is preferable that the mortar layer 230 is formed to a thickness within 50 mm. In the design of a general bridge, a bridge device is used between the superstructure and the undercarriage to evenly distribute the load of the superstructure to the undercarriage. Mortar of 50mm thickness is usually formed on the upper part of the stabilization device and the shift wall, and serves to correct the height according to the construction error or the plan change. Therefore, it is preferable to install a mortar within 50 mm between the support device and the shift 20 according to the present invention so that the height difference due to the construction error or the height adjustment can be corrected.

If necessary, the assembly unit 200 may further include a washer 240 provided between the fixing nut 220 and the bottom plate 140. The washer 240 serves to ensure that the external force acting by the fixing nut 220 is more uniformly transmitted to the base plate 140.

1 to 3, the girder support device according to the present invention includes a displacement receiving support portion 300.

The displacement receiving portion 300 is provided on the upper portion of the support box 100, and serves to support the height and angle of the upper girder 10 is adjusted in accordance with the position in close contact with the lower portion of the upper girder 10. Perform.

More specifically, the displacement receiving portion 300 is formed as the upper surface has an arc-shaped curved surface as shown in Figure 1 and the first to the third support plate coupled to the upper surface of the support box 100 ( 310, 320, 330 is configured. At this time, the first support plate 310, the second support plate 320 and the third support plate 330 is attached to the upper surface of the support box 100 by welding or the like.

The displacement receiving portion 300 may be manufactured separately from the support box 100 and then formed as a single body through welding, or may be manufactured integrally with the support box 100 through an injection mold or the like.

If necessary, the displacement receiving portion 300 is preferably formed in an arc-shaped curved surface so that the upper surface has the same radius from the hinge rod 400 is assembled to the supporting box 100. This is to maintain the coupling relationship between the rotary bar 500 and the upper girder 10 having a certain length even when a displacement (horizontal, vertical, rotation) occurs in the upper girder 10.

In addition, the displacement receiving portion 300 may be provided with a coupling module such that the first support plate 310, the second support plate 320, the third support plate 330 has a coupling relationship with each other.

9 is a perspective view showing an embodiment of the displacement receiving portion according to the present invention. Referring to FIG. 9, the coupling module 340 includes a coupling steel bar 342 penetrating through the first support plate 310, the second support plate 320, and the third support plate 330, and the coupling steel bar 342. The first supporting plate 310 and the second supporting plate 320 and the third supporting plate 330 may be composed of a pair of coupling nuts 344 installed on both ends of the coupling steel bar 342. At this time, the coupling steel bar 342 may be provided with two or more so that the first support plate 310, the second support plate 320 and the third support plate 330 more firmly coupled, both ends of each of the coupling steel bar 342 The coupling nut 344 may be installed.

10 is a perspective view showing another embodiment of the displacement receiving portion according to the present invention. Referring to FIG. 10, the coupling module 340 is provided between the first support plate 310 and the second support plate 320, and is provided between the second support plate 320 and the third support plate 330. The first supporting plate 310, the second supporting plate 320, and the third supporting plate 330 may be formed of a plurality of coupling pieces 346 connecting to each other. The coupling piece 346 is installed on the support plate through welding or the like.

On the other hand, the displacement receiving portion 300 may be provided with a lubrication layer (not shown) to reduce the friction on the upper surface in contact with the upper girder 10. In other words, a lubrication layer may be provided on the upper surfaces of the first support plate 310, the second support plate 320, and the third support plate 330. At this time, the lubricating layer may be composed of lubricating oil.

1 to 3, the support device for the girder according to the present invention includes a hinge rod (400).

The hinge rod 400 is assembled to the support box 100 in the width direction of the upper girder 10, and the first through hole and the second through hole and the third through hole formed in the support box 100 described above. Inserted to penetrate. At this time, the outer diameter of the hinge rod 400 may be formed to have a length equivalent to the inner diameter of the first through hole, the second through hole and the third through hole.

In addition, the hinge rod 400 is formed in a length that both ends can be exposed to the outside in the state inserted into the support box 100, the spiral portion is formed at both ends exposed to the outside of the support box 100.

In addition, the hinge rod 400 may be provided with a nut 410 and a washer 420 at both ends to block movement in the front, rear, left and right directions in the state inserted into the support box 100. More specifically, the first nut is coupled to the spiral portion formed at one end of the hinge rod 400 and in close contact with the support box 100, for example, the first side plate 120, the second nut is the other end of the hinge rod 400 It is coupled to the spiral formed in the support box 100, for example, in close contact with the second side plate 130. In addition, a first washer may be provided between the first nut and the first side plate 120, and a second washer may be provided between the second nut and the second side plate 130.

As such, the hinge rod 400 is fixed to the support box 100 by being coupled to nuts and washers at both ends in a state of being inserted into the support box 100, and the rotating rod 500 is a deformed form of the upper girder 10. The axis of rotation is provided so that it can be rotated accordingly.

11 is a perspective view showing an embodiment of a rotating rod according to the present invention.

1 to 3, the support device for girder according to the present invention includes a rotary bar (500).

The rotating rod 500 is fitted to the hinge rod 400 to be rotated about the hinge rod 400, the through-hole 510 is fitted to the hinge rod 400 is formed at one end and the one end The spiral portion 520 is provided at the other end opposite to the spiral. In this case, the through hole is formed to have an inner diameter corresponding to the outer diameter of the hinge rod 400.

As a specific aspect, the rotating rod 500 according to the present invention may be provided with a rotating plate 530, the through-hole 510 is formed at one end as shown in FIG. The rotating plate 530 has a through hole 510 formed at the center thereof, and may be formed to have a rectangular, circular, or octagonal structure as a whole.

The rotary rod 500 rotates in a state coupled with the upper girder 10 to accommodate the vertical load and the horizontal displacement and the horizontal displacement caused by the temperature change acting on the upper girder 10. To this end, the rotating rod 500 is fitted to the lower portion of the upper girder spiral portion provided at the other end.

In other words, the rotary bar 500 serves to prevent the fall of the upper girder 10, and serves to hold the upper girder 10 in rotation and horizontal and vertical deformation.

In a particular aspect, the rotating rod 500 according to the present invention may be configured to include a first rotating rod 501 and a second rotating rod 502. In this case, the first rotating rod 501 is fitted to the hinge rod 400 and is horizontally movable along the hinge rod 400 between the above-described first supporting plate 310 and the second supporting plate 320. The second rotating rod 502 is fitted to the hinge rod 400 and is horizontally movable along the hinge rod 400 between the second supporting plate 320 and the third supporting plate 330. That is, the rotary rods 501 and 502 are moved along the hinge rod 400 while the rotary rods 501 and 502 move along the hinge rod 400 even when displacement errors occur in the left and right directions when the upper girder 10 is installed on the basis of the longitudinal direction of the upper girder 10. Accept the displacement error generated in (10).

And the upper girder 10 is coupled to the spiral portion of the rotating rod 500 is a long hole 12 is formed in the longitudinal direction of the upper girder 10, as shown in Figures 4 and 6 and 8. At this time, the long hole 12 may be formed in the steel plate attached to the lower flange or the bottom of the upper girder 10. Accordingly, the rotating rod 500 is moved while the displacement bar 500 is moved along the long hole 12 even if a displacement error occurs in the front-rear direction when the upper girder 10 is installed on the basis of the longitudinal direction of the upper girder 10. The displacement error generated in the girder 10 is accommodated.

12 to 14 is a schematic diagram showing a change in contact point according to the movement of the upper girder. Supporting device for the girder according to the present invention by changing the support point of the upper girder 10 so that the moment is not generated during the installation of the slab concrete from the installation of the upper girder 10, as shown in Figure 4 to 8 It provides a function to hold 10 so as not to deviate from the shift (20).

In general, it seems stable to make the girder bridge as horizontal as possible when it is finally completed.

12 shows the shape after the superstructure is installed in the support device of the present invention. The upper girder is formed so as not to sag below a certain level even if a camber is formed that rises by a linear compression force or a load is applied later.

Figure 13 shows the shape of the support and the superstructure during slab casting. After installing the upper girder, it is possible to accommodate horizontal, vertical and rotational movements when placing the slab, and to reduce the moment transmitted to the lower foundation as much as possible by reducing the bending moment generated at the end edge.

14 shows the shape of the supporting device and the superstructure when excessive load occurs from the superstructure. This shows that the support device according to the present invention is an ideal structure to prevent the conduction of the superstructure and to securely support the rotational movement and vertical and horizontal displacement.

As described above, the present invention uses the connecting structure of the hinge rod 400, the rotary rod 500 and the upper girder 10 at the time of receiving the displacement and placing the slab concrete for errors generated during the installation of the upper girder 10. It can accommodate all horizontal, vertical and rotational displacements that occur.

1 to 3, the support device for girder according to the present invention includes a fall prevention nut.

The fall prevention nut 600 is coupled to the spiral portion of the rotating rod 500 so that the upper girder 10 can be in close contact with the displacement receiving portion 300, the rotating rod 500 and the upper girder 10 In close contact with the upper girder 10 so as to maximize the coupling force.

In this case, a washer 610 may be provided between the fall prevention nut 600 and the upper girder 10 to prevent stress concentration.

15 and 16 are flowcharts for explaining the construction method of the support device for the girder according to the present invention.

15 and 16, the construction method of the ramen bridge using the support device for the girder according to the present invention is a substructure construction step (S100) and the anchor bolt (filling the anchor bolt 210 in the alternating 20) Connection member installation step (S200) for installing the support box 100 is provided with a displacement receiving portion 300 on the upper portion of the 210, the hinge rod 400 and the rotating rod 500 inside the support box 100 Assembling step (S300) and assembling the upper girder 10 to the upper portion of the displacement receiving portion 300, and installs the upper girder step (S400) to adjust the horizontal, vertical position, optionally Slab placing step (S500) for placing the slab concrete in the upper girder 10 may be further included.

In the connecting member installation step (S200), after fixing the support box 100 to the anchor bolt 210 so that the anchor bolt 210 is fitted into the assembly hole formed in the bottom plate 140 of the support box 100, the fixing nut Assembling the 220 to the spiral portion of the anchor bolt 210 to fix the support box 100 to the shift (20). At this time, the coupling of the anchor bolt 210 is to be adjusted by positioning according to the plan of the upper part to be finally constructed, and the height of the anchor bolt 210 is adjusted to be combined and then the base plate 140 and the shift (20) Between the mortar 230 to be installed within 50mm.

In the assembling step (S300), a second between the second support plate 320 and the third support plate 330 during the process of interpolating the hinge rod 400 into the third through hole and the first through hole of the support box 100 first. Passing the hinge rod 400 through the through-hole formed in one end of the rotating rod 502, the first support plate 310 during the process of interpolating the hinge rod 400 into the first through hole and the second through hole of the support box 100 ) And a hinge rod 400 through a through hole formed at one end of the first rotating rod 501 between the second supporting plate 320. Then, the first washer and the first nut coupled to the spiral formed on one end of the hinge rod 400 so that the hinge rod 400 exposed to both sides of the support box 100 is fixed to the support box 100, The second washer and the second nut are coupled to the spiral portion formed at the other end of the hinge rod 400.

In the upper girder installation step (S400), the helix of the rotating rod 500 is inserted into the long hole 12 of the upper girder 10, the spiral of the rotating rod to maintain the upper girder 10 is coupled to the rotating rod 500 Assemble the fall prevention nut 600 in the part.

In the slab pouring step (S500), the contact position of the girder support device and the upper girder of the present invention is adjusted to accommodate horizontal, vertical and rotational movements when installing the upper girder and then placing the slab concrete.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

100: support box 110: main body
120: first side plate 130: second side plate
140: bottom plate 200: assembly
210: anchor bolt 220: fixing nut
230: mortar layer 300: displacement receiving portion
310: first support plate 320: second support plate
330: third support plate 342: bonding steel bar
344: coupling nut 346: coupling piece
400: hinge rod 410: nut
420: washer 500: rotating rod
510: through hole 520: spiral part
530: rotating plate 600: fall prevention nut

Claims (10)

In the supporting device for the girder, which is installed on the upper part of the shift, the upper girder is mounted,
A support box installed at an upper portion of the shift and having a hollow formed thereon;
An assembly unit installed between the support box and the shift to fix the support box to the shift;
A displacement accommodating support part provided at an upper portion of the support box and supporting the height and angle of the upper girder according to a position in close contact with the lower portion of the upper girder;
A hinge rod assembled to the support box in the width direction of the upper girder;
To move horizontally along the hinge rod and to rotate around the hinge rod to prevent the fall of the upper girder and to accommodate the rotational displacement and horizontal displacement caused by the vertical load and temperature change acting on the upper girder, A rotating rod having a through hole fitted to a hinge rod at one end thereof and having a spiral portion at the other end opposite to the one end thereof, wherein the spiral rod is fitted to a lower portion of the upper girder; And
It is coupled to the spiral portion of the rotating rod so that the upper girder is in close contact with the displacement receiving portion, and includes a fall-proof nut in close contact with the upper girder,
The displacement receiving base portion is formed of an arc-shaped curved surface so that the upper surface has the same radius from the hinge rod assembled to the supporting box, the lower surface is configured to include a first to third supporting plate coupled to the upper surface of the supporting box,
The rotating rod is fitted to the hinge rod and is fitted to the first rotating rod and the hinge rod horizontally moved along the hinge rod between the first supporting plate and the second supporting plate, and between the second supporting plate and the third supporting plate. Girder support device comprising a second rotating rod that moves horizontally along the hinge rod. The method of claim 1, wherein the support box
A main body formed of H-beam or I-beam,
A first side plate provided on the left side of the main body to cover the left side of the main body with respect to the longitudinal direction of the upper girder;
A second side plate provided on the right side of the main body to cover the right side of the main body, and
Girder support device, characterized in that the base plate provided on the lower end of the main body, the first side plate and the second side plate to cover the lower end of the main body and the first side plate and the second side plate to provide a space in which the assembly is installed. The method of claim 2, wherein the assembly portion
An anchor bolt having a lower end alternately installed and an upper end protruding from the upper plate through the lower plate, a fixing nut coupled to an upper portion of the anchor bolt to fix the lower plate, and adjusting the height and angle of the upper girder. Girder support device characterized in that it comprises a mortar layer that is poured between the base plate and the alternating. The method of claim 3, wherein the mortar layer
Girder support device characterized in that formed to a thickness within 50mm. According to claim 1, wherein the displacement receiving portion is
Girder support device characterized in that the lubrication layer to reduce the frictional force is provided on the upper surface in contact with the upper girder. delete delete The method of claim 1, wherein the upper girder
Supporting device for girders, characterized in that any one of a steel composite girders, steel girders and prestressed concrete girders. The method of claim 1, wherein the rotating rod
The rotating plate is provided with a through hole formed in the one end, the support plate for the girder, characterized in that formed to have a rectangular, circular, or octagonal structure. Substructure construction step of embedding the anchor bolt in the shift;
A connection member installation step of installing a support box provided with a displacement receiving base on an upper portion of the anchor bolt;
An assembling step of assembling a hinge rod and a rotating rod into the supporting box; And
And installing an upper girder on an upper portion of the displacement receiving base and adjusting horizontal and vertical positions.
In the assembling step, the rotating rod may move horizontally along the hinge rod to serve to prevent the fall of the upper girder and to accommodate the rotational displacement and the horizontal displacement caused by the vertical load and the temperature change acting on the upper girder. Passing the hinge rod through a through hole formed at one end of the second rotating rod between the second supporting plate and the third supporting plate while interpolating the hinge rod with the supporting box so that the rotating rod can rotate about the hinge rod; Ramen bridge construction method comprising the step of passing the hinge rod through the through-hole formed in one end of the first rotating rod between the first supporting plate and the second supporting plate during the interpolation of the hinge rod.

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