KR102105680B1 - Integrated junction structure of continuous type girder and pier - Google Patents

Abstract

The present invention is a pier; Girders that are continuous in the direction of the throttle on the upper side of the pier and are spaced a certain distance in the direction perpendicular to the throttle; A rigid joint reinforcing bar having a lower portion buried in the pier and installed on both sides of the girders; Transverse reinforcing bars reinforced in the direction perpendicular to the rigid joint reinforcing bars on the upper side of the pier; Including the cross beam block that integrates the pier, the rigid joint reinforcing bars, the transverse reinforcing bars, and the girders by pouring and curing the upper side of the pier, and the rigid joint reinforcing bars extend to the neutral axis or higher of the girders. As a continuous girder and a bridge integrated joint structure characterized by being extended, since the rigid joints of the pier and the girder using a rigid joint reinforcement in the continuous girder bridge, it is possible to omit the configuration of the expansion joint and the bridge bearing The construction cost is reduced, and the construction of the expansion joints and bridge supports can be omitted, thereby reducing maintenance costs while sharing the girder, and eliminating traffic control during maintenance. Maintenance cost is reduced because there is no social cost, and bottom plate concrete is placed between the girders. Since the compression stiffness of the girder is increased by pouring, it is possible to provide an effect of efficiently preventing the girder from being compressed and destroyed by effectively responding to the compressive stress generated by the parent moment at the pier point portion of the girder.

Description

Integrated junction structure of continuous type girder and pier}

The present invention relates to a continuous girder and a bridge integrating joint structure, and relates to a technique for integrating a bridge and a continuous girder by a rigid joint structure and a hinge joint structure.

In an ordinary bridge, a bridge support is installed on the upper side of the bridge, and a telescopic joint device is installed between the girder and the girder.

The elastic bearing used as the bridge bearing has a cost according to construction. In addition, the elastic bearing is deformed due to expansion and contraction due to temperature load, and the deformed elastic bearing does not recover, so a step may occur between the bridge and the alternating shift, which may impair driving stability. In addition, the elastic bearing after a certain period of time must be replaced due to corrosion or hardening, and the maintenance cost due to replacement increases, and there is a cost to install a maintenance facility for maintenance. Social costs increase.

The expansion joint also incurs the cost of construction of the expansion joint. In addition, the driving performance due to the expansion joints is poor, and the surroundings of the expansion joints are continuously damaged by vehicles. In addition, new joints after a certain period of time must be replaced, but maintenance costs associated with replacement increase, and social costs due to traffic blocking due to replacement increase.

Therefore, the development of a technology capable of removing the bridge support and the expansion joint from the upper side of the bridge has been requested.

Patent 1: Republic of Korea Utility Model No. 20-0300023

In order to solve the above problems, the present invention is a continuous girder mounted on the upper side of the pier to omit the expansion and contraction device, integral with the girder and the pier and the girder and bridge piers can be omitted by integrating a continuous girder and bridge integration joint structure Want to provide.

The continuous girder and the bridge integrated joint structure according to an example of the present invention, the pier; Girders that are continuous in the direction of the throttle on the upper side of the pier and are spaced a certain distance in the direction perpendicular to the throttle; A rigid joint reinforcing bar having a lower portion buried in the pier and installed on both sides of the girders; Transverse reinforcing bars reinforced in the direction perpendicular to the rigid joint reinforcing bars on the upper side of the pier; Including the cross beam block that integrates the pier, the rigid joint reinforcing bars, the transverse reinforcing bars, and the girders by pouring and curing the upper side of the pier, and the rigid joint reinforcing bars extend to the neutral axis or higher of the girders. It can be characterized as being extended.

In addition, between the pier and the girder is provided with a support for girder mounting may be characterized in that the girders are mounted spaced a predetermined distance from the upper surface of the pier.

In addition, it may be characterized in that it further comprises a bottom plate concrete which is lowered between the girders and cured by pouring before and after the throttle direction to resist compressive stress due to the parent moment of the pier point portion.

In addition, the girder may be characterized in that the PSC (prestressed concrete) girder, steel girder, or steel composite girder.

In addition, another embodiment of the continuous girder and the bridge integrated joint structure according to an example of the present invention, the pier; Girders that are continuous in the direction of the throttle on the upper side of the pier and are spaced a certain distance in the direction perpendicular to the throttle; A rigid joint reinforcing bar having a lower portion buried in the pier and installed on both sides of the girders; Transverse reinforcing bars reinforced in the direction perpendicular to the rigid joint reinforcing bars on the upper side of the pier; Includes; the girder is a rectangular box of steel, the girder is a rectangular box of steel, by pouring and hardening on the upper side of the pier, thereby integrating the pier, the stiffening joint reinforcing bars, the transverse reinforcing bars, and the girders. An opening opening on the bottom surface of the square box and an opening reinforcing member installed in a lattice shape in the opening may be further included, and the rigid bonding reinforcing bars and the cross beam block may also be provided inside the square box. You can.

In addition, the rigid joint reinforcement may be characterized in that it extends to more than the neutral axis of the rectangular box.

In addition, it may be characterized in that it further comprises a shear member is embedded in the block-out portion is formed on the upper side of the bridge and coupled to the lower surface of the rectangular box.

In addition, it can be characterized in that it further comprises a bottom plate concrete that is inside and below the square box and is cured by pouring before and after the throttling direction to resist compressive stress caused by the parent moment of the pier point portion.

In addition, another embodiment of the continuous girder and the bridge integrated joint structure according to an example of the present invention, the pier; A shear pocket formed in a direction perpendicular to the throttle on the upper side of the pier; Rigid bonding reinforcing bars in which the lower portion is buried at a predetermined distance in the direction perpendicular to the throttle in the shear pocket portion; Square boxes that are continuous in the direction of the throttle on the upper side of the pier, are spaced a certain distance in the direction perpendicular to the throttle, and have an opening formed on a lower surface facing the pier; An opening reinforcement member installed in a lattice shape in the opening; Includes; the horizontal beam block integrating the piers, the rigid joint reinforcing bars, the girders, and the opening reinforcement by pouring and curing on the upper side of the pier, wherein the rigid joint reinforcing bars are less than or equal to the neutral axis of the rectangular box It can be characterized as extending to.

In addition, between the pier and the rectangular box, the elastic filling material is provided in the direction perpendicular to the throttle in the front and rear of the front end pocket portion, so that the rectangular boxes are mounted spaced apart at a predetermined distance from the upper surface of the pier.

In addition, it can be characterized in that it further comprises a bottom plate concrete that is inside and below the square box and is cured by pouring before and after the throttling direction to resist compressive stress caused by the parent moment of the pier point portion.

In addition, a transverse reinforcement bulkhead may be provided between the transverse beam block and the bottom plate concrete.

Through the present invention, it is possible to reduce the construction cost by omitting the expansion joint device and the bridge support, lower the girder mold height, and lengthen the span.

In addition, there is no need to replace the expansion joint device and the bridge support, so maintenance costs can be reduced while sharing.

In addition, there is no social cost because there is no need to control traffic for maintenance such as replacement of expansion joints and bridge supports.

In addition, there is no expansion joint and bridge support, so the bridge is excellent in driving performance.

In addition, by placing the bottom plate concrete on the lower side between the girders, the compressive stiffness of the girders is increased, and it is possible to efficiently respond to the compressive stress generated by the parent moment of the pier point.

1A to 1C are cross-sectional views showing a state in which a continuous girder and a bridge integrated joint structure according to an example of the present invention are implemented with a PSC U-type girder.
2A to 2B are cross-sectional views showing a state in which a continuous girder and a bridge-integrated joint structure according to an example of the present invention are implemented with a PSC I-type girder.
3A to 3B are cross-sectional views showing a state in which a continuous girder and a bridge-integrated joint structure according to an example of the present invention are implemented with a steel type I girder.
4A to 4B are cross-sectional views showing a state in which a continuous girder and a bridge-integrated joint structure according to another example of the present invention are implemented in a rectangular box.
5A to 5C are cross-sectional views showing a state of a continuous girder and a bridge-integrated hinge joint structure according to another example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but another component between each component May be "connected", "coupled" or "connected".

Hereinafter, with reference to FIGS. 1 to 3, a continuous girder and a bridge-integrated joint structure which is an example of the present invention will be described.

This embodiment includes a pier 10; Girders (20) that are continuous in the direction of the throttle on the upper side of the pier (10) and are spaced apart a certain distance in the direction of the throttle. A rigid joint reinforcing bar 30 having a lower portion buried in the pier 10 and installed on both sides of the girders 20; Transverse reinforcing bars 40 which are reinforced in an orthogonal direction to the rigid joint reinforcing bars 30 on the upper side of the pier 10; A crossbeam block that integrates the pier 10, the rigid joint reinforcing bars 30, the transverse reinforcing bars 40, and the girders 20 by pouring and curing on the upper side of the pier 10 50) ;, the rigid joint reinforcing bar 30 may extend to more than the neutral axis of the girder (20).

Girders 20 may be mounted on the upper side of the pier 10. The girder 20 may be mounted continuously in the throttle direction from the upper side of the pier 10, that is, continuously mounted. The girders 20 may be mounted spaced a certain distance in the direction perpendicular to the throttle. The girder 20 may be a trapezoidal, or I-type PSC girder, a steel girder, or a steel composite girder.

Between the piers 10 and the girders 20, a girder mounting bracket 60 may be provided. That is, the pedestal 60 for girder mounting may be provided at the central portion in the throttle direction. By providing a girder mounting base 60, the girders 20 may be spaced apart a predetermined distance from the top surface of the pier 10. Therefore, the girder 20 and the pier 10 are integrated, and at the same time, a certain separation space is secured and concrete is poured, so that the lower side of the girder 20 does not directly contact the pier 10, so that the girder 20 and the pier 10 ) Can be prevented from being damaged. The girder mounting base 60 may be buried inside the crossbeam block 50 to be described later.

The rigid joint reinforcing bars 30 may be provided on both sides of the girders 20 with the lower portion buried in the pier 10 and protruding upward. That is, the lower portion is buried and coupled to the girder 20 and the upper portion protrudes to the upper side of the girder 20 and is disposed on both sides of the girder 20 to be embedded in the crossbeam block 50 described later. The rigid joint reinforcing bars 30 may be formed to extend beyond the neutral axis of the girders 20. The rigid bonding reinforcing bar 30 may strengthen the coupling between the girder 20 and the pier 10 as it extends upward. The rigid joint reinforcing bars 30 may be installed in a grid shape in front and rear, left and right on the pier 10. That is, the girders 20 may be installed to be disposed in front, rear, left, and right on the upper side of the pier 10 of the portion where the girders 20 are not installed.

Auxiliary rebars may be installed between the pier 10 and the lower surface of the girder 20. That is, it is buried in the pier 10 and is partially exposed to the upper side and may be installed to approach the lower surface of the girder 20. These auxiliary reinforcing bars can make the girders 20 firmly supported on the shift by reinforcing the concrete poured between the lower surface of the girders 20 and the piers 10. The auxiliary reinforcing bars are different from the rigid bonding reinforcing bars 30 in that the length protruding upwards is short and located at the lower side of the girder 20.

On the upper side of the pier 10, the transverse reinforcement 40 may be reinforced in a direction orthogonal to the rigid joint reinforcing bars 30. That is, the transverse reinforcing bars 40 may be reinforced in a direction orthogonal to the rigid joint reinforcing bars 30 on both sides of the girder 20 while being above the pier 10. The transverse reinforcing bar 40 can increase the rigidity of the transverse beam block 50 together with the rigid joint reinforcing bar 30.

The concrete beam may be poured on the upper side of the pier 10 to form the crossbeam block 50. The girders 20 are firmly coupled to the girders 10 by integrating the girders 20 with the bridge 10, the rigid joints 30, the girders 20, and the girders 20. I can do it. Therefore, the moment due to the load of the superstructure can be transmitted to the lower portion, and the seismic resistance ability can be increased.

The bottom plate concrete 70 may be placed before and after the axial direction while being lower between the girders 20. Reinforcing bars may be reinforced inside the base plate concrete 70. The base plate concrete 70 can resist the compressive stress caused by the parent moment occurring at the point portion of the pier 10 of the girder 20. Therefore, by increasing the resistance to the parent moment acting on the girder 20, the bridge can be long-spanned or reduced in size, and the size of the girder 20 can be reduced.

Hereinafter, with reference to FIG. 4, another embodiment of the present invention will be described with a continuous girder and a bridge integrated joint structure.

This embodiment includes a pier 10; Girders (20) that are continuous in the direction of the throttle on the upper side of the pier (10) and are spaced apart a certain distance in the direction of the throttle. A rigid joint reinforcing bar 30 having a lower portion buried in the pier 10 and installed on both sides of the girders 20; Transverse reinforcing bars 40 which are reinforced in an orthogonal direction to the rigid joint reinforcing bars 30 on the upper side of the pier 10; A crossbeam block that integrates the pier 10, the rigid joint reinforcing bars 30, the transverse reinforcing bars 40, and the girders 20 by pouring and curing on the upper side of the pier 10 50); the girder 20 is a rectangular box made of steel, and the opening 80 is opened on the lower surface of the rectangular box facing the pier 10, and the opening 80 is installed in a grid shape. The opening reinforcement 82 is further included, and the rigid bonding reinforcing bars 30 and the transverse beam block 50 may be provided inside the rectangular box.

In this embodiment, the differences from the above-described embodiment will be mainly described. The part not described in this embodiment can be applied by analogy with the above-described embodiment.

The girder 20 of the present embodiment may be a rectangular box made of steel. The lower surface of the rectangular box, that is, the portion facing the pier 10 may have an opening 80. The opening 80 may be provided with a grid-like opening reinforcement 82. The opening reinforcing material 82 may be welded to the opening 80 of the rectangular box at the ends by arranging the band-shaped steel members in a lattice shape and welding each other.

In the above-described embodiment, the rigid bonding reinforcing bars 30 and the crossbeam block 50 may be formed inside the rectangular box. That is, the rigid joint reinforcing bars 30 may be installed in the lower part of the girder 20 and the upper part may extend to the inside of the rectangular box. The rigid joint reinforcing bars 30 embedded in the piers 10 may penetrate the belt-shaped members of the opening reinforcement 82 or extend upwardly between the belt-shaped members. Rigid joint reinforcing bars 30 may extend beyond the neutral axis of the rectangular box. The transverse reinforcing bar 40 may be reinforced to the inside of the rectangular box as needed. Since the rigid joint reinforcing bars 30 and the crossbeam block 50 are also formed inside the rectangular box, the bonding force between the pier 10 and the girder 20 is significantly increased, and the rigidity of the point portion of the rectangular box can be greatly increased. The transverse reinforcement bulkhead 22 is installed at the front and rear ends of the transverse block 50 to seal the rectangular box. The transverse reinforcement bulkhead 22 can facilitate the placing of the transverse beam block 50 inside the rectangular box and increase the rigidity of the rectangular box at the point.

A block-out part 90 may be formed on the upper side of the pier 10 while being the lower side of the lower side of the rectangular box. A front end member 92 may be provided in the block-out part 90. The shear member 92 is coupled to the lower side of the rectangular box by welding or the like, and may be embedded in the concrete that is inserted into the block-out portion 90 and poured. That is, the shear member 92 is coupled to the lower side of the sandbox by welding or the like, and after inserting the shear member 92 inside the block-out unit 90, concrete is poured and sheared to the block-out unit 90. The member 92 can be buried. Therefore, the square box can be firmly coupled to the pier 10.

The bottom plate concrete 70 may be placed on the inner lower side of the rectangular box. The base plate concrete 70 may be poured into the parent part portion before and after the throttle direction. Therefore, the bottom plate concrete 70 placed on the inner lower side of the rectangular box may have an increased resistance to compression stress due to the parent moment occurring at the point of the pier 10 of the girder 20.

Hereinafter, with reference to FIG. 5, another embodiment of the present invention will be described a continuous girder and a bridge integrated joint structure.

This embodiment includes a pier 10; A shear pocket portion 100 recessed in the direction perpendicular to the throttle on the upper side of the pier 10; Rigid bonding reinforcing bars 30 spaced apart at a predetermined distance in the direction perpendicular to the throttle pocket 100 and buried underneath; Square boxes which are steel girders that are continuous in the throttling direction on the upper side of the pier 10, are spaced at a certain distance in the right angle direction of the pier, and have an opening 80 formed on a lower surface facing the pier 10; An opening reinforcement 82 installed in a lattice shape in the opening 80; A horizontal beam block (integrating the pier 10, the rigid joint reinforcing bars 30, the girders 20, and the opening reinforcement 82 by pouring and curing on the upper side of the pier 10) 50) ;, the rigid joint reinforcing bars 30 may extend up to or below the neutral axis of the rectangular box.

In this embodiment, the same parts as the above-described embodiments are omitted. The part not described can be applied by analogy with the above-described embodiments. The girder 20 of this embodiment is a rectangular box made of steel, and the girder 20 and the pier 10 are hinged.

A shear pocket portion 100 may be formed on an upper side of the pier 10. The front pocket portion 100 may be formed by being recessed in the direction perpendicular to the throttle. The front pocket portion 100 may be a triangular, square, or trapezoidal groove.

In the front pocket portion 100, the rigid joint reinforcing bars 30 are spaced apart a predetermined distance in the direction perpendicular to the throttle, and the lower portion may be buried and installed in the pier 10. Reinforcing bars may be additionally reinforced in the direction perpendicular to the throttle before and after the rigid joint reinforcing bar 30. The rigid joining reinforcing bars 30 installed in the shearing pocket portion 100 and the concrete poured into the shearing pocket portion 100 allow the girder 20 to be firmly coupled to the pier 10 and at the same time act as a hinge. You can. Therefore, the continuous girder 20 is firmly coupled to the upper side of the pier 10 and enables rotation about the shear pocket portion 100 so that the pier 10 resists only the horizontal force of the girder 20.

The rigid joint reinforcing bars 30 of this embodiment may extend to the neutral axis or less of the rectangular box. This allows the concrete to be poured into the rigid bonding reinforcing bars 30 and the shear pockets 100 installed in the shear pocket portion 100 to be firmly coupled to the girder 20, and at the same time act as a hinge. To do

The elastic filling material 102 may be provided between the pier 10 and the rectangular boxes, and before and after the front end pocket portion 100 in the direction perpendicular to the shaft. The elastic filling material 102 may be spaced apart from the pier 10 by a predetermined distance from the pier 10 and concrete may be poured therebetween. This may enable the girder 20 to be properly rotated around the shear pocket portion 100. The elastic filler 102 can be removed after the concrete has cured. Concrete poured between the elastic filler 102 may be formed narrower than the width in the front and rear direction of the pier (10). This may allow the pier 10 and the girder 20 to be combined in a hinged structure.

In the same manner as in the above-described embodiment, the bottom plate concrete 70 may be placed on the inner lower side of the rectangular box. The base plate concrete 70 may be cast before and after the throttling direction. The base plate concrete 70 may have resistance to compression stress caused by the parent moment occurring at the point of the pier 10 of the girder 20. In addition, a transverse reinforcement bulkhead 22 may be installed between the transverse beam block 50 and the bottom plate concrete 70.

As in the above-described embodiment, the transverse reinforcement bulkhead 22 may seal the square box. The transverse reinforcement bulkhead 22 can facilitate the placing of the transverse beam block 50 inside the rectangular box and increase the rigidity of the rectangular box at the point.

After all, the present invention is mounted on the girder 20 continuous to the upper side of the pier (10), placed in the rigid joint reinforcing bars (30) buried in the pier (10), cross-beam to orthogonal to the rigid joint reinforcement (30) By laying concrete reinforcing the reinforcing bars 40 and integrating them, the girders 20 and the piers 10 are rigidly or hinged, so there is no need to separately provide the expansion joints and bridge supports, thus increasing the constructability and construction. It is possible to provide a continuous girder and a bridge-integrated joint structure in which the pier 10 and the girder 20 are integrated, which can reduce cost, have excellent usability, and can reduce maintenance costs.

In the above, even if all the components constituting the embodiments of the present invention are described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the present invention, all the components may be configured or operated by selectively combining one or more components. In addition, the terms "include", "consist" or "have" as described above mean that the corresponding component can be intrinsic, unless specifically stated to the contrary, excluding other components. It should not be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person skilled in the art to which the present invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the contextual meaning of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

10: Pier
20: girder
22: transverse reinforcement bulkhead
30: rigid joint reinforcing bar
40: transverse reinforcement
50: Garobo Block
60: stand
70: bottom concrete
80: opening
82: opening reinforcement
90: block-out part
92: shear member
100: shear pocket
102: elastic filler

Claims (12)

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A shear pocket portion recessed into a ladder-shaped groove in a direction perpendicular to the throttle on the upper side of the pier;
Rigid bonding reinforcing bars in which the lower portion is buried at a predetermined distance in the direction perpendicular to the throttle in the shear pocket portion;
Square boxes that are continuous in the direction of the throttle on the upper side of the pier, are spaced a certain distance in the direction perpendicular to the throttle, and have an opening formed on a lower surface facing the pier;
An opening reinforcement material in which band-shaped steel members are arranged in a lattice shape to be welded to each other and welded to an opening of a rectangular box at an end;
Includes; by placing and curing on the upper side of the pier, the beam bridge, the rigid joint reinforcing bars, the girders, and a transverse block integrating the opening reinforcement;
The rigid joint reinforcing bars extend below the neutral axis of the rectangular box,
Between the pier and the rectangular box, an elastic filling material is provided in the direction perpendicular to the throttle in front and rear of the shear pocket portion, so that the rectangular boxes are spaced at a predetermined distance from the upper surface of the pier,
It includes the bottom plate concrete which is inside and below the rectangular box and is cured by pouring before and after the throttle direction to resist the compressive stress caused by the parent moment of the pier point part.
A transverse reinforcement bulkhead is provided between the transverse beam block and the bottom plate concrete,
Reinforcing bars are additionally reinforced in the direction perpendicular to the throttle before and after the rigid joint reinforcing bar, and a reinforcing bar or a spiral reinforcing bar surrounding the additionally reinforced reinforcing bars is reinforced,
The rigid joint reinforcement bars installed in the shear pocket portion and the concrete cast in the shear pocket portion allow the girder to be firmly coupled to the pier, and at the same time, the continuous girder and the pier integrated joint structure characterized in that it is possible to rotate the continuous girder. .


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