KR101607485B1 - Curved-psc girder with outrigger and curved-psc girder bridge construction method therewith - Google Patents

Abstract

The present invention relates to a curved PSC girder manufactured to have a constant curvature to be stably manufactured and constructed when being manufactured, lifted, and placed and relates to the construction method thereof. The curved PSC girder is manufactured to have protruding blocks bilaterally symmetrical and formed into a convex shape on lateral surfaces of both ends of the curved PSC girder to prevent the curved PSC girder from being turned over by corresponding to a gravity center line (G1) formed in a bent direction (A). The protruding blocks are directly installed in the curved PSC girder and placed on an abutment and a pier to position the gravity center line (G1) and a lifting center line (G2).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a PSC curved girder having a protruding block and a curved girder bridge construction method using the PSC curved girder.

The present invention relates to a PSC curved girder having a protruding block and a curved girder bridge construction method using the PSC curved girder. More specifically, a PSC curved girder having a protruding block integrally fixed at both ends of a protruding block by using an expandable embedding plate so that it can be stably manufactured and constructed even during manufacture, lifting and mounting, and a curved girder bridge construction method using the same It is about.

The most common form of bridge construction is Girder Bridge.

These girder bridges consist of a superstructure including a slab and a girder, and a substructure including a foundation slab, an alternation, and a bridge.

These girder bridges are constructed by placing a plurality of girders on piers or alternations, and placing slab concrete to form slabs thereon.

Further, most of the PSC girders are manufactured in the shape of a straight beam, but they are sometimes formed in a curved shape in a curved bridge.

Such a curved PSC girder (PSC curved girder) is subjected to a strain in the center portion of the PSC girder due to the tension of the tension member (PC girder) at the time of manufacture, so that the PSC curved girder is forced to be transmitted.

In addition, not only at the time of fabrication but also at the time of installation (lifting and fixing both ends), the center of gravity is not on the line connecting both ends of the PSC girder.

Therefore, the PSC curved girder had to make efforts to ensure that the arbitrary lifting point (A1) coincides with the center of gravity (G1) of the conduction so that the risk of conduction is offset.

1A, an anti-falling device 10 for a curved girder which can reliably lift a PSC curved girder is introduced.

It comprises an upper strut 11, a vertical strut 12 for beam support, a beam confining member 13, a lower strut 14, a lower hinge connection 15 and a vertical reference strut 16.

1B, the curved beam 20 and the curved beam 20 are held in a state in which the curved beam 20 is restrained and supported by the beam restraining member 13, the vertical strut 12 and the lower strut 14 for supporting the beam, The center of gravity G1 of the conduction by the apparatus 10 is confirmed and the lifting point A1 corresponding to the center of gravity G1 of the conduction is confirmed at the upper strut 11 and the lifting point A1 is lifted, (30) are connected to each other so that conduction does not occur in the manufacture, movement, or lifting of the beam.

However, the problem of conduction caused by PSC curved girder tensioning and mounting is that when using the conventional anti-fall device, equipment such as a crane is required at the time of installation before the tension work, and the cross beam is laid even after the shift or pier is mounted. There has been a problem in terms of time and economy.

Further, a PSC girder 10 used for a conventional half-girder bridge is shown in Fig. 1C.

It can be seen that the PSC girder 10 is formed with end partition walls 12 at both ends and that the end partition walls 12 are formed as a block having a section larger than the width of the PSC girder 10. [ have.

However, this end partition wall 12 is applied to a straight PSC girder. Such an end partition wall 12 may be suitable for a PSC girder having an I-shaped cross-section using a certain formwork. However, the PSC curved girder having a variable- It is difficult to consider it as a means of preventing the occurrence of an overturn, and it can be said that it is formed in a sectional shape favorable to the alternate back earth pressure, especially in the case of a half-body type bridge,

Accordingly, the PSC curved girder is capable of solving the problem of the conduction occurring when the tension member is tensed during the manufacturing process, and the lifting point G2 corresponding to the center of gravity G1 of the conduction is immediately confirmed on the PSC curved girder, A PSC curved girder provided with a protruding block which can prevent the occurrence of a conduction in making, moving, or lifting the girder by allowing the protruding block to be easily installed on the PSC curved girder so that the center of gravity is connected to the point G2, and And to provide a method of constructing a curved girder bridge.

The present invention also provides a PSC curved girder having a protruding block which is easy to install by using the protruding block, and a curved girder bridge construction method using the PSC curved girder.

In order to solve the above problems,

First, the curved girder is formed into a box-shaped section. This boxed section is more advantageous for buckling or twisting than the I-section, and is much more advantageous for long-span bridges.

These PSC curved girders are constructed as reinforced concrete girders with prestressing by placing tension material inside.

Therefore, when a prestress is introduced with respect to the horizontal central axis of the cross section, the PSC curve girder can be turned in the curved direction (A) in the radial direction from both ends of the PSC curved girder due to the rising in the central portion in the longitudinal direction The present invention forms a protruding block which is formed so as to protrude from the side surface at both ends so as not to be guided in the curved direction A in the radial direction from both ends of the PSC curved girder.

That is, the protruding block can support the force to be conducted, so that the protruding block is not conducted even by the introduction of the prestress through the tension member.

However, if such a protruding block is formed only on one side of the PSC curved girder, the center of the cross section and the center of the tensile material do not coincide in the transverse direction, so that lateral displacement may occur in tension.

Therefore, the protruding blocks of the present invention are formed to be symmetrical with respect to the center in the left and right directions, so that the lateral displacement which can be generated in the tension can be controlled.

As a result, it becomes possible to reduce or eliminate the force of the PSC curved girder to be conducted by allowing the bridge pedestal to be installed on the bottom of the protruding block of the PSC curved girder.

Secondly, the protruding block is used for forming a cross beam by the locally laid concrete along with the protruding block of the PSC curved girder adjacent to the transverse direction after the embedding, so that it can be efficiently used for the end cross beam construction of the PSC curved girder.

Third, the protruding block can be manufactured together with the PSC curved girder, but in this case, the PSC curved girder must be deformed due to the protruding block, which reduces the usability of the form. Accordingly, the protruding block is precastically manufactured, and the PSC curved girder is fixed to the PSC curved girder using a connecting member such as a steel bar and grouting, and the joint surface with the PSC curved girder is finished with epoxy or the like.

Further, considering the weight of the precast protruding block, the pre-cast protruding block can be supported on the extended buried plate by expanding the buried plate provided at the bottom of the end of the PSC curved girder, thereby forming a stable precast protruding block .

Fourth, the present invention enables the PSC curved girder to be mounted and transferred using the lifting point G2 corresponding to the center of gravity G1 of the conduction, so that the conduction does not occur during the construction process, It is possible to provide a PSC curved girder having a block and a curved girder bridge construction method using the PSC curved girder.

Fifthly, since the precast protruding block is formed on both lateral sides of the PSC curved girder (both sides, that is, transverse direction with respect to the longitudinal direction of the PSC curved girder), it is possible to install the bridge supports in a perpendicular direction It becomes more effective in prevention of conduction.

The PSC curved girder according to the present invention can be prevented from falling to the construction after the manufacture, transportation and installation, and can be stably installed. In addition, since special techniques are not required to manufacture the protruding block itself, it is possible to manufacture economical PSC curved girders.

It is also possible to reduce or eliminate the force of the PSC curved girder by making it possible to install the bridge pedestal at the bottom of the protruding block of the PSC curved girder.

In addition, since the protruding block can be used also in the end cross beam construction, a more economical PSC curve girder bridge construction becomes possible. This makes it possible to form a more efficient and stable protruding block, thus making it possible to construct an efficient PSC curved girder.

Figs. 1A and 1B are a perspective view of a conventional PSC curved girder,
1C is a perspective view of a linear PSC girder having a conventional end bulkhead,
FIG. 2A is a structural perspective view of a PSC curved girder according to the present invention,
2B is a perspective view of the PSC curved girder of the present invention,
2C is a perspective view of the PSC curved girder 100 formed with the protruding block 150 of the present invention,
Fig. 3 is a PSC curved girder,
4A, 4B and 4C are flowcharts of the construction method of the PSC curved girder 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.

[PSC curved girder 100 with protruding block 150 of the present invention]

FIG. 2A is a perspective view of the PSC curved girder 100 of the present invention, and FIG. 2B is a perspective view of the PSC curved girder 100 of the present invention.

For this purpose, as shown in FIG. 2A, the present invention comprises an extended buried plate 160 formed to extend laterally on the bottom surface of the lower flange end of the PSC curved girder; And a protruding block 150 installed so as not to be guided in a curved direction A in the radial direction from both ends of the PSC curved girder, ): ≪ / RTI > a PSC curved girder with a protruding block. Here, the radial direction means a direction perpendicular to the circumferential direction, which is a tangential direction at a certain point in the circumference, in the direction from the imaginary center of the circumference consisting of the PSC curved girder toward the outside. In the present invention, since the girder is most likely to be conducted in the radial direction from the both ends of the PSC curved girder in the radial direction, the direction is defined as the warped direction (A).

That is, the PSC curved girder 100 has, for example, an upper flange 110, a side wall 120 and a lower flange 130, a tension member 140, a protruding block 150, an extended landfill plate 160, And the hollow portion S is formed in order to reduce its own weight.

Although the hollow portion S may be formed as an empty space, it is general that the EPS block is embedded so as to form a hollow portion.

Thus, it can be seen that the upper flange, both side walls and the lower flange are formed to have a rectangular cross-sectional shape, but are formed to have a constant curvature in the longitudinal direction and to be bent in one side direction (A: curved direction).

At this time, the tensile material 140 is arranged on the transverse section of the PSC curved girder 100 in the transverse direction with respect to the central axis (or the center) with respect to the central axis (or the center) So that a prestress is introduced.

Due to the introduction of this prestress, the PSC curved girder is raised at the center, and at this time, a force is generated to be transmitted from the opposite ends of the transversely oriented PSC curved girder to the curved direction A in the radial direction at the intermediate point .

Accordingly, the present invention forms the protruding block 150 for the purpose of preventing the conduction.

This protruding block 150 is supported on the upper surface of the expanded landfill plate 160 so as not to be guided in the radial direction A in the radial direction from both ends of the PSC curved girder and is integrally provided on both sides of the PSC curved girder As shown in FIG.

That is, in order to offset the forces to be conducted in the curved direction A in the radial direction from both ends of the PSC curved girder, the protruding blocks 150 are symmetrically arranged in the left and right directions with respect to the center axis (or the center) It is a basic function of the protruding block 150 to prevent the transverse displacement that occurs when it is tense,

With the PSC curved girder, the bridge block can be positioned on the bottom of the protruding block at both ends of the PSC curved girder.

In addition, the protruding block 150 is formed in both left and right directions on both ends of the PSC curved girder in consideration of the central axis (or the center) of the cross section, thereby making it possible to manufacture, stabilize and mount a more stable PSC curved girder do.

The PSC curved girder 100 may be integrally formed with the PSC curved girder 100. The PSC curved girder 100 may be precasted and fixed to both ends of the PSC curved girder.

The reason for this is that it is more advantageous to fix PSC curved girders separately in consideration of ease of fabrication and economy of the formwork.

In addition, since the protruding block 150 may vary in size depending on the extension length of the PSC curved girder 100, the protruding block 150 may be precasted to flexibly cope with it.

The PSC curved girder 100 is required to be fixed with respect to the PSC curved girder 100. The PSC curved girder 100 may have an increased weight due to its size, And the expanded buried plate is installed as an expanded buried plate so that the buried block 150 is installed on the upper surface.

Accordingly, it is possible to stably mount the bridge support 200 by the expansion buried plate 160, and the precast protruding block 150 can be installed more stably.

That is, the extended landfill plate 160 is integrally formed on the bottom of the end portion of the lower flange 130 of the PSC curved girder and is formed to extend in both lateral directions with respect to the longitudinal direction of the PSC curved girder.

2B, the PSC curved girder 100 is fixed to the end of the PSC curved girder 100 by using the connecting member 170 when the protruding block 150 is seated on the extended embedment plate 160. Therefore, it is possible to install the bridge support in a state in which the bridge support is moved in a direction in which the bridge support is moved (moved to one side), thereby ensuring stability.

The horizontal connecting member 171 such as a steel bar is connected to the protruding block 150 through the horizontal pipe 151 previously formed in the protruding block 150 and the horizontal pipe 151 previously embedded in the end of the PSC curved girder 100, So that the protruding block 150 can be pressed and fixed to both ends of the PSC curved girder 100 by the fixing nuts.

At this time, the protruding block 150 can be stacked on top of each other. For this purpose, a vertical tube 152 such as a sheath is buried in the protruding block 150, and a vertical tube 152 communicated vertically The vertical connecting member 172 is inserted so as to pass therethrough and both ends of the vertical connecting member 172 are fixed to the upper surface and the lower surface of the protruding block 150 so that the protruding block 150 can be easily installed by stable lamination .

Particularly, the lower end of the vertical connection member 172 is fastened to the fixing nut 161 formed on the upper surface of the expanded landfill plate 160. The vertical pipe and the horizontal pipe are closed with a grouting material, ) And the PSC curved girder may be finished with an adhesive such as epoxy.

Accordingly, the protruding block 150 of the present invention can adjust the length by adjusting the width, and adjust the height by adjusting the thickness of the laminate.

[Production method of PSC curved girder (100) of the present invention]

2C is a perspective view of the PSC curved girder 100 in which the protruding block 150 of the present invention is formed.

First, the expanded landfill plate 160 spaced apart from each other is disposed on the upper surface of the fabrication stand.

The extended landfill plate 160 is integrally formed with the bottom of the protruding block 150 and the end of the PSC curved girder 100 and is supported by the bridge support 200. A steel plate may be used.

The extended buried plate 160 is expanded according to the bottom surface of the PSC curved girder 100 according to the present invention and the bottom surface of the protruding block 150.

The mold is set so that the expanded landfill plate 160 is located at the inner bottom of both ends, the EPS block is disposed inside the mold, and the unillustrated reinforcing bars and the tensile material 140 are arranged and arranged.

These molds are formed so as to be symmetrically formed on both ends of the PSC curved girder 100 except for the protruding block 150.

Next, the concrete is inserted into the mold, cured and demolded, and the expanded landfill plate 160 is integrally formed on both bottom ends of the PSC curved girder 100.

The protruding block 150 manufactured by the precast method is placed on the expansion buried plate 160 and fixed to the end of the PSC curved girder 100 by using the coupling member 170. [

As described above, the protruding block 150 is fixed to the PSC curved girder 100 by using the horizontal connecting member 171, and the vertical connecting member 172 is used to laminate the upper and the lower protruding blocks 150, The contact surface of the girder is closed with an adhesive such as epoxy.

[Construction of cross beam 180 of PSC curved girder 100 of the present invention]

3 shows a construction diagram of the PSC curved girder 100 and the beam 180 of the present invention.

That is, after lifting by the lifting wire as shown in FIG. 3, the bridge supports 200, which are previously installed on the bridge pier, are supported so that both end bottoms are supported.

At this time, in the case of the PSC curved girder 100, it is mounted by the bridge support 200, and it may be unstable in the step before the intersection, so that it is preferable that the end support is provided alternately with the bottom surface of the protruding block 150 and the top surface of the bridge.

That is, the end support 190 may be installed on the bottom surface of the protruding block 150, which is located in the curved direction A in the radial direction from both ends of the PSC curved girder 100. The end support 190 may be a screw jack capable of adjusting the height.

In addition, it can be seen that a beam 180 is formed between the protruding blocks 150 of the adjacent PSC curved girder 100 by the cast concrete (C).

In other words, it can be seen that the beam 180 is formed in such a manner that the protruding block 150 is embedded. This serves as a pedestal for the construction of the beam 180, do.

[Method of constructing a curved girder bridge using a PSC curved girder with a protruding block of the present invention]

FIGS. 4A, 4B and 4C show a flowchart of a method of curved girder bridge construction using a PSC curved girder with a protruding block according to the present invention.

(A) A curved girder with a box-shaped cross section formed with a hollow portion including an upper flange 110, both side walls 120 and a lower flange 130. The curved girder is integrally formed with the bottom of the lower flange 130, A PSC curved girder (100) having hollow portions formed with extended buried plates (160) formed to extend in both lateral directions with respect to the longitudinal direction of the curved girder;

(b) are supported on the upper surface of the expanded landfill plate 160 so as not to be guided in the curved direction A in the radial direction from both ends of the PSC curved girder so as to be integrally fixed on both sides of the PSC curved girder Installing a block (150); And

(c) lifting the PSC curved girder (100) formed with the protruding block and alternately mounting the PSC curved girder (100) on the bridge substructure including the pier. The PSC curved girder construction method is provided with the protruding block.

First, as shown in FIG. 4A, a PSC curved girder 100 having a protruding block 150 of the present invention is manufactured at a manufacturing site such as a factory, and tension is applied to the PSC curved girder.

As shown in FIG. 4B, a lifting wire connected to a crane or the like is lifted and loaded on a transportation means, and brought into the field.

At this time, the weight center line G1 considering the protruding block 150 and the lifting center line G2 are made to coincide and can be easily lifted like a straight beam.

In other words, the PSC curved girder 100 is formed with the protruding blocks 150 corresponding to the sectional height of the PSC curved girder 100 on both side ends thereof, and the center of gravity G1 of the entire PSC curved girder is symmetrically and left- Is formed on the left side of the vertical center axis G0 of the end section. As a result, the PSC curved girder is weighed in the radial direction (A) at the intermediate point from both ends of the girder.

In order to form the lifting center line G2 in accordance with the center-of-gravity line G1, the lifting wire is lifted by using a crane or the like so that the lifting wire is positioned on both sides of the lifting center line G2. If the lifting center line G2 is not provided, The lifting wire B can not be aligned with the lifting center line G2.

Accordingly, it can be seen that the protruding block 150 of the present invention is very important for installing the lifting wire according to the coincidence of the lifting center line G2 and the center-of-gravity line G1.

That is to say, the protruding block 150 is formed symmetrically with respect to the end section vertical center axis G0 of the PSC curved girder so that stable lifting is possible.

4C, the PSC curved girder 100 of the present invention is alternately mounted on the bridges 200 previously installed on the bridge pier D. In consideration of the protruding block 150, The center of gravity (G1) and the center of gravity (G2) can be matched to each other, and can be simply mounted on a bridge support after lifting like a straight beam. At this time, it is preferable that safe installation can be performed by using the end support 190 (auxiliary means).

As a result, it can be seen that the present invention does not require the use of a separate lifting device as shown in FIG. 1B, and a PSC curved girder can be manufactured and used for curved bridge.

The PSC curved girder 100 having the protruding block 150 can be mounted on the bridge support 200 more stably without damaging the bridge support 200 by using the expanded landfill plate 160 as a steel plate.

In this way, the cross beam 180 is installed between the PSC curved girders 100 and the slab 300 is formed to construct the curved girder bridge using the PSC curved girder 100 having the protruding block.

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: PSC curved girder
110: upper flange 120: side wall
130: Lower flange 140: Tension material
150: protruding block 151: horizontal tube
152: Vertical tube
160: Extended landfill plate
170: connecting member 171: horizontal connecting member
172: vertical connection member 180:
190: end support 200: bridge support

Claims (7)

An extended buried plate 160 integrally formed on the bottom of the lower end of the lower flange 130 of the PSC curved girder and extending to both sides with respect to the longitudinal direction of the PSC curved girder; And
The PSC curved girder is supported on the upper surface of the expanded landfill plate 160 so as not to be guided in the curved direction A in the radial direction from both ends of the girder and is provided so as to be integrally fixed to the sides of each end of the PSC curved girder symmetrically Block 150,
The protruding block 150 is fixed to the end of the PSC curved girder 100 by using a connecting member 170. The bridge support 200 is fixed to the end of the PSC curved girder 100 by a radius And a protruding block capable of moving to a lower portion of the protruding block 150 and capable of reducing or eliminating a force to be transferred to the PSC curved girder. The method according to claim 1,
The PSC curved girder 100 is formed in a box-shaped cross section with a hollow portion including an upper flange 110, both side walls 120 and a lower flange 130,
The protruding block 150 has a protruding block as a precast block chain formed symmetrically with respect to the end section vertical center axis G0 of the PSC curved girder. The method according to claim 1,
The connecting member 170 includes a horizontal connecting member 171 and a vertical connecting member 172,
The horizontal coupling member 171 passes through the horizontal pipe 151 previously formed in the protruding block 150 and through the horizontal pipe 151 which is previously embedded in the end of the PSC curved girder 100, And a protruding block which is fixed to the outer surface of the protruding block (150) so that the protruding block (150) can be pressed and fixed to both ends of the PSC curved girder (100). The method of claim 3,
A vertical pipe 152 is embedded in the protruding block 150 and a vertical pipe 172 is inserted so as to pass through a vertically communicating vertical pipe 152. Both ends of the vertical pipe 172 are inserted into a protruding block 152, And a protruding block for fixing the upper and lower surfaces of the protruding block 150 by stacking. (a) A curved girder of a box-shaped cross section formed with a hollow portion including an upper flange 110, both side walls 120 and a lower flange 130. The curved girder is integrally formed with the bottom of the lower flange 130 in the longitudinal direction of the PSC curved girder A PSC curved girder 100 having hollow portions formed with extended buried plates 160 formed to extend in both lateral directions with respect to the PSC curved girder 100;
(b) The PSC curved girder is supported on the upper surface of the expansion buried plate 160 so as to prevent the PSC curved girder from being conducted in the radial direction (A) from both ends of the PSC curved girder at the intermediate point, Installing a protruding block (150) so as to be integrally fixed in a symmetrical manner; And
(c) The PSC curved girder 100 formed with the protruding block is brought into contact with the bridge substructure including the bridge substructure including the alternating pier and the bridge pier in such a manner that the center line G1 and the center line G2, (200), the method comprising:
The protruding block 150 is fixed to the end of the PSC curved girder 100 by using the connecting material 170 and the bridge pedestal 200 can be installed on the bottom surface of the protruding block 150 of the PSC curved girder 100 And a protruding block capable of reducing or eliminating a force to be conducted by the PSC curved girder. 6. The method of claim 5,
After the step (c), the protruding block 150 is embedded with the protruding block of the adjacent PSC curved girder into the beam concrete so that the protruding block is integrally formed with the cross beam and the protruding block. . The method according to claim 6,
The protrusion block 150 of the PSC curved girder is formed symmetrically with respect to the vertical center axis G0 of the end section of the PSC curved girder. When the PSC curved girder is mounted on the bridge support 200, To be supported by an end support (190) on the PSC curved girder.

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