KR102410461B1 - Cantilever structure for bridge - Google Patents

Abstract

A cantilever structure for a bridge according to an embodiment includes a girder, a support member disposed on a side surface of the girder, a connection hardware connecting the girder and the support member, and a cantilever disposed on the support member, the connection hardware comprising: , at least a part of the first unit connecting hardware is embedded in the girder, the other part is exposed to the outside of the girder, and at least a part is embedded in the support member, and the other part is exposed to the outside of the support member so that the first It may include a second unit connection hardware coupled to the unit connection hardware.

Description

Cantilever structure for bridge

The present invention relates to a cantilever structure for a bridge, and more specifically, it can secure sufficient rigidity to prevent sagging, has excellent structural stability to resist bending moment, and is easy to install, thereby preventing safety accidents of workers. It is an invention about a technology that can prevent it.

In a girder bridge, an abutment or a pier is built, a girder is mounted on it, and concrete is poured on the upper surface of the girder to form a floor plate that supports people or vehicles. In the process of pouring concrete, the formwork and the girder are installed or dismantled on the girder, and in this process, there is a risk of safety accidents such as a fall accident of the worker. In addition, a lot of time and money is required in the process of installing and dismantling the formwork and the copper bar, and there is a problem that the economic feasibility is lowered. In addition, since the dismantling of the formwork and poles is carried out under the bottom plate of the high-altitude bridge, the risk of safety accidents for workers becomes significant. In order to solve this problem, a half-deck made of precast that can omit the formwork and moving parts, and a pedestal and connection structure that can stably support the half-deck are needed. In particular, the cantilever in the bridge has one end fixed and the other end free, but it is easy to deform because only one end is fixed and receives a lot of bending moment, so attention is required in strength design. In addition, due to the nature of construction, the difficulty is high, and there is an important problem that must be prepared for safety accidents.

Republic of Korea Patent Registration No. 10-2212482 - Half-section deck using a bridge bracket and its construction method

The cantilever structure for a bridge according to an embodiment is an invention designed to improve the above problems, can secure sufficient rigidity to prevent sagging, has excellent structural stability to resist bending moment, and is easy to install The purpose of this is to provide technology that can prevent safety accidents for workers.

A cantilever structure for a bridge according to an embodiment includes a girder, a support member disposed on a side surface of the girder, a connection hardware connecting the girder and the support member, and a cantilever disposed on the support member, the connection hardware comprising: , at least a part of the first unit connecting hardware is embedded in the girder, the other part is exposed to the outside of the girder, and at least a part is embedded in the support member, and the other part is exposed to the outside of the support member so that the first It may include a second unit connection hardware coupled to the unit connection hardware.

The first unit connecting iron and the second unit connecting iron may be formed by cutting a single H-shaped steel.

The connection hardware may include a cut surface disposed between the first unit connection hardware and the second unit connection hardware, and the cut surface may be perpendicular to a longitudinal direction of the first unit connection hardware and the second unit connection hardware. .

An upper coupling part is disposed on an upper surface of the first unit connection hardware and an upper surface of the second unit connection hardware, a first lower coupling part is disposed on the abdomen of the first unit connection hardware, and in the abdomen of the second unit connection hardware A second lower coupling part is disposed, and the first lower coupling part and the second lower coupling part may be screwed through a bolt.

An epoxy may be disposed between the first unit connecting iron and the second unit connecting iron corresponding to the cut surface.

The upper coupling part includes a first upper coupling part and the second upper coupling part spaced apart from each other, and disposed between the first upper coupling part and the second upper coupling part on the upper surface of the first unit connection hardware Guides may be included.

The support member includes a bottom portion coupled to a side surface of the girder and a fence portion protruding upward from an end of the bottom portion, and the cantilever includes an upper surface of the bottom portion and a lower surface portion disposed on the upper surface of the girder; It may include a side portion disposed inside the fence portion.

The cantilever structure for a bridge may include a connecting reinforcing bar partially embedded in the supporting member and the other part protruding upward from the upper surface of the supporting member.

The connecting hardware may include a through hole through which the concrete is embedded by passing through the other side from one side.

The cantilever structure for a bridge according to an embodiment of the present invention has an advantage in that the cantilever can be quickly and easily installed on the girder by assembling the girder and the supporting member through the connecting hardware.

In addition, since a separate dismantling process is unnecessary, the process is simplified, and there is an advantage in that it is possible to prevent a safety accident of an operator.

In addition, since it is possible to block the occurrence of deflection during the construction process and to provide a structure that can transmit the load stably to the girder, there is an advantage of securing structural stability.

1 is a view showing a conceptual diagram of a cantilever structure for a bridge according to an embodiment of the present invention.
2 is a perspective view of a cantilever structure according to an embodiment of the present invention.
3 is a perspective view illustrating a coupling structure of a girder and a support member according to an embodiment of the present invention.
4 is a perspective view illustrating a coupling structure of a support member and a connecting hardware according to an embodiment of the present invention.
5 is a perspective view showing a coupling structure of a support member and a connecting hardware according to an embodiment of the present invention from an angle different from that of FIG. 4 .
6 is a plan view illustrating a side surface of a connecting hardware according to an embodiment of the present invention.
7 is a perspective view of a connecting hardware according to an embodiment of the present invention.
8 is a cross-sectional view showing the coupling structure of the girder and the support member through the connecting hardware according to an embodiment of the present invention.
9 is a cross-sectional view illustrating a coupling structure of a support member and a cantilever in an arrangement area of a connecting hardware according to an embodiment of the present invention.
10 is a cross-sectional view illustrating a coupling structure of a support member and a cantilever in an area other than a connecting hardware arrangement area according to an embodiment of the present invention.
11 is a view for explaining a construction process of a support member according to an embodiment of the present invention.
12 is a view showing a first modified example of the connecting hardware according to the embodiment of the present invention.
13 and 14 are views illustrating a second modified example of a connecting hardware according to an embodiment of the present invention.
15 is a view showing a third modified example of the connecting hardware according to an embodiment of the present invention.
16 and 17 are views illustrating a fourth modified example of a connecting hardware according to an embodiment of the present invention.
18 is a perspective view of a cantilever structure according to a second embodiment of the present invention.
19 is a perspective view showing the coupling structure of the girder and the supporting member according to the second embodiment of the present invention.
20 is a perspective view illustrating a state in which a first unit connecting hardware is coupled to a girder according to a second embodiment of the present invention.
21 is a perspective view illustrating a coupling structure of a support member and a connecting hardware according to a second embodiment of the present invention.
22 is a view showing the coupling structure of the support member and the connecting hardware according to FIG. 21 from another angle.
23 is a perspective view of a connecting hardware according to a second embodiment of the present invention.
24 is a view showing the connecting hardware according to FIG. 23 from another angle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected between the embodiments. It can be used by combining or substituted with .

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention pertains, unless specifically defined and described explicitly. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art.

In addition, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or more than one) of A and (and) B, C", it is combined as A, B, C It may include one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term.

And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also the component It may also include cases where it is 'connected', 'coupled' or 'connected' due to another element between the and another element.

In addition, when it is described as being formed or disposed on "upper (above) or under (below)" of each component, upper (above) or lower (below) is not only when the two components are in direct contact with each other, but also Also includes cases in which one or more other components are formed or disposed between two components. In addition, when expressed as "upper (upper) or lower (lower)", a meaning of not only an upper direction but also a lower direction based on one component may be included.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description will be omitted.

1 is a conceptual diagram of a cantilever structure for a bridge according to an embodiment of the present invention, FIG. 2 is a perspective view of a cantilever structure according to an embodiment of the present invention, and FIG. 3 is a combination of a girder and a supporting member according to an embodiment of the present invention It is a perspective view showing the structure, Figure 4 is a perspective view showing the coupling structure of the support member and the connecting hardware according to an embodiment of the present invention, Figure 5 is a perspective view showing Figure 4 from another angle, Figure 6 is the present invention It is a plan view showing the side of the connecting hardware according to an embodiment of the present invention, Figure 7 is a perspective view of the connecting hardware according to an embodiment of the present invention, Figure 8 is a girder and a support member through the connecting hardware according to an embodiment of the present invention It is a cross-sectional view showing a coupling structure, and FIG. 9 is a cross-sectional view showing a coupling structure of a support member and a cantilever in an arrangement area of a connection hardware according to an embodiment of the present invention, and FIG. 10 is a connection hardware arrangement according to an embodiment of the present invention. It is a cross-sectional view showing the coupling structure of the support member and the cantilever in an area other than the area.

1 to 10 , the cantilever structure 10 for a bridge according to an embodiment of the present invention may include a support member 200 , a cantilever half deck 300 and .

The girder 100 may be disposed on an abutment or a pier. A plurality of girders 100 may be provided to be spaced apart from each other. The girder 100 may be an I-type girder made of concrete. The girder 100 may include an upper flange 120 , a lower flange 130 , and an abdomen 110 .

The support member 200 may be coupled to a side surface of the upper flange 120 . The supporting member 200 is provided in plurality along the longitudinal direction of the girder 100, and may be equally installed at regular intervals. The supporting member 200 is precast and may be coupled to the girder 100 through the connecting hardware 400 as shown in FIG. 11 . The support member 200 supports the cantilever half-deck 300 and is coupled to the bottom plate to act as a single structure.

The support member 200 may include a bottom portion 210 and a fence portion 220 . The bottom part 210 may be coupled to the side surface of the upper flange 120 . The bottom portion 210 may be disposed at the same height as the upper flange 120 in a right angle direction. The fence part 220 is formed to extend upwardly from an end of the bottom part 210 , and may be disposed perpendicular to the bottom part 210 . The fence part 220 may have a shape protruding upward from the top surface of the bottom part 210 .

A chamfered surface 212 may be formed in a corner region connecting the lower surface of the bottom part 210 and the outer surface of the fence part 220 . The outer surface of the fence unit 220 may be an inclined surface 222 having a shape in which the thickness of the fence unit 220 becomes thinner as it goes upward.

The fence unit 220 serves as a formwork to prevent water leakage when the concrete floor plate is poured. In addition, the cantilever half-deck 300 is prevented from departing to the outside, thereby increasing construction stability. In addition, there is an advantage in that the construction accuracy of the cantilever half deck 300 can be improved by forming the outermost boundary of the bottom plate. There is an advantage of forming a safety handrail at the top of the fence unit 220 to increase the safety of the operator.

The support member 200 may include a connecting reinforcing bar 240 . As shown in FIG. 4 , a part of the connecting reinforcing bar 240 may be disposed in the support member 200 , and the other part may protrude upward from the upper surface of the support member 200 to be exposed to the outside.

The coupling between the support member 200 and the cantilever half deck 300 and the bottom plate 190 can be firmly maintained through the connecting reinforcing bar 240 . A plurality of connecting reinforcing bars 240 may be provided to be spaced apart from each other in the longitudinal direction of the support member 200 . The cross-sectional shape of the connecting reinforcing bar 240 protruding upward of the support member 200 may be a rectangle. An area of the support member 200 in which the connecting reinforcing bar 240 is disposed may be defined as a first area. In addition, the region of the support member 200 in which the connecting hardware 400 is disposed may be defined as the second region.

The support member 200 may include a first groove 215 . The first groove 215 may be recessed to a predetermined depth from the top on the end surface of the support member 200 facing the upper flange 120 of the girder 100 . A plurality of first grooves 215 may be provided to be symmetrically disposed in the center. The first groove 215 provides a space for fastening the first bolt 435 when the upper flange 120 and the support member 200 are connected.

The connecting hardware 400 may connect the girder 100 and the support member 200 to each other. The connecting hardware 400 may be disposed between the girder 100 and the support member 200 . The connecting hardware 400 may be an H-shaped steel.

The connection hardware 400 may include a first unit connection hardware 410 and a second unit connection hardware 420 . The first unit connection hardware 410 and the second unit connection hardware 420 can be freely separated and combined through bolting. The first unit connecting hardware 410 may be coupled to the girder 100 . The first unit connecting hardware 410 may be included in the upper flange 120 of the girder. The second unit connecting hardware 420 may be included in the support member 200 . A first unit connection hardware 410 and a second unit connection hardware 420 may be formed by cutting the H-beam steel of a single standard, respectively.

11 is a view for explaining the construction process of the support member according to the embodiment of the present invention, Figure 12 is a view showing a first modified example of the connecting hardware according to the embodiment of the present invention.

11 , the girder 100 and the supporting member 200 may be coupled to each other by assembling the first unit connecting hardware 410 and the second unit connecting hardware 420 by an operator.

A part of the first unit connecting hardware 410 may be embedded in the girder 100 and the rest may be disposed to protrude above the girder 100 . A part of the second unit connecting hardware 420 may be embedded in the support member 200 , and the rest may be disposed to protrude above the support member 200 . Since the height of the support member 200 is increased as the connecting hardware 400 protrudes to the outside, sufficient rigidity to prevent sagging can be secured, and the installation for bolting is easy to prevent safety accidents of workers. .

A cut surface may be formed between the first unit connection hardware 410 and the second unit connection hardware 420 . As shown in FIG. 6 , the cut surface is a first cut surface 405 extending downward from the upper surface of the connecting hardware 400 , and a second cut surface 406 extending outwardly from the lower end of the first cut surface 405 . and a third cut surface 407 extending downward from the extended end of the second cut surface 406 . The second cut surface 406 may be formed perpendicular to the first cut surface 405 and the third cut surface 407 , respectively. When the support member 200 and the girder 100 are coupled, the surfaces corresponding to the cut surfaces of the first unit connecting hardware 410 and the second unit connecting hardware 420 may be disposed to face each other or may be in contact with each other.

The first unit connecting hardware 410 may include a first protrusion 419 . The first protrusion 419 may be formed to protrude upward from the outer surface of the first unit connection hardware 410 corresponding to the second cut surface 406 . The first protrusion 419 may be disposed in a corner region of the first unit connecting hardware 410 connecting the second cut surface 406 and the third cut surface 407 . The outer surface of the first protrusion 419 may be curved. The cross-sectional shape of the first protrusion 419 may be semicircular.

On the outer surface of the second unit connecting hardware 420 facing the first protrusion 419, a second groove 429 having a shape that is recessed inward than other regions may be formed. The cross-sectional shape of the second groove 429 may be formed to correspond to the cross-sectional shape of the first protrusion 419 . The coupling between the first unit connection hardware 410 and the second unit connection hardware 420 may be firmly maintained through the first protrusion 419 and the second groove 429 .

The first unit connection hardware 410 and the second unit connection hardware 420 may be coupled to each other through a plurality of coupling parts. The plurality of coupling parts may include a first coupling part 430 , a second coupling part 440 , a third coupling part 217 , and a fourth coupling part 218 .

The first coupling part 430 may be disposed adjacent to the upper end of the first unit connection hardware 410 . The first coupling part 430 may be disposed adjacent to an upper plate in the first unit connection hardware 410 among the side surfaces of the abdominal plate in the first unit connection hardware 410 . A plurality of first coupling parts 430 may be provided to be respectively disposed on both sides of the abdominal plate in the first unit connecting hardware 410 . The first coupling part 430 may be disposed to overlap the first cut surface 405 in the horizontal direction. The first coupling part 430 may include a hole through which a first bolt 435 to be described later passes.

The second coupling part 440 may be disposed adjacent to the upper end of the second unit connection hardware 410 . The second coupling part 440 may be disposed to face the first coupling part 430 . The second coupling part 440 is disposed adjacent to the upper plate 422 (refer to FIG. 5) in the second unit connecting hardware 420 among the side surfaces of the abdominal plate 424 (refer to FIG. 5) in the second unit connecting hardware 420. can be The second coupling part 440 may be provided in plurality and may be respectively disposed on both sides of the abdominal plate in the second unit connecting hardware 420 . The second coupling part 440 may be disposed to overlap the first cut surface 405 in the horizontal direction. The second coupling part 440 may include a hole through which the first bolt 435 passes.

The first coupling part 430 and the second coupling part 440 may include a plurality of plate parts perpendicular to each other, respectively. For example, as shown in FIG. 5 , the second coupling part 440 includes a first plate part 441 protruding from the side surface of the connection flange 424 in the second unit connection hardware 420 , and the first plate part ( It may include a second plate part 422 bent from the extended end of the 441 . At this time, a hole to which the first bolt 435 is coupled may be formed in the first plate portion 441 .

The first bolt 435 may be coupled to the hole of the first coupling part 430 and the hole of the second coupling part 440 , respectively. The first bolt 435 may be screwed into the hole of the first coupling part 430 and the hole of the second coupling part 440 . A nut for strengthening coupling force with the first coupling part 430 or the second coupling part 440 may be coupled to at least one end of both ends of the first bolt 435 .

The third coupling part 217 may be disposed adjacent to the lower end of the first unit connection hardware 410 . The third coupling part 217 may be disposed adjacent to a lower plate in the first unit connection hardware 410 among the side surfaces of the abdominal plate in the first unit connection hardware 410 . A plurality of third coupling units 217 may be provided to be respectively disposed on both sides of the abdominal plate in the first unit connecting hardware 410 . The third coupling part 217 may be disposed to overlap the third cut surface 407 in the horizontal direction. The third coupling part 217 may include a hole through which a second bolt 219 to be described later passes. The third coupling part 217 may be disposed on the outer surface of the upper flange 120 of the girder 100 .

The fourth coupling part 218 may be disposed adjacent to the lower end of the second unit connection hardware 420 . The fourth coupling part 218 may be disposed to face the third coupling part 217 . The fourth coupling part 218 may be disposed adjacent to a lower plate in the second unit connecting hardware 420 among the side surfaces of the abdominal plate in the second unit connecting hardware 420 . The fourth coupling part 218 may be provided in plurality and may be respectively disposed on both sides of the abdominal plate in the second unit connection hardware 420 . The fourth coupling portion 218 may be disposed to overlap the third cut surface 407 in the horizontal direction. The fourth coupling part 218 may include a hole through which a second bolt 219 to be described later passes. The fourth coupling part 218 may be disposed in the first groove 215 . Accordingly, the fourth coupling portion 218 may be firmly supported through the concrete 215a (refer to FIG. 8 ) embedded in the first groove 215 .

The second bolt 219 may be coupled to the hole of the third coupling part 217 and the hole of the fourth coupling part 218 , respectively. The second bolt 219 may be screwed into the hole of the third coupling part 217 and the hole of the fourth coupling part 218 . A nut for strengthening coupling force with the third coupling part 217 may be coupled to the second bolt 219 . The nut may be fixed to the first unit connecting hardware 410 by welding. The nut may be a sleeve threaded on the inner surface.

Meanwhile, the first unit connection hardware 410 and the second unit connection hardware 420 may be coupled to each other through an adhesive. The adhesive may include epoxy. The adhesive may be disposed on the concrete surface including the third cut surface 407 . In some cases, when the first unit connection hardware 410 and the second unit connection hardware 420 are coupled through an adhesive, the third coupling part 217 and the fourth coupling part 218 may be omitted.

On the other hand, as shown in FIG. 12 , an additional connecting material 500 may be disposed on the upper surface of the connecting hardware 400 in order to strengthen the bonding force between the first unit connecting hardware 410 and the second unit connecting hardware 420 . have. The additional connecting member 500 may be disposed on the joint surface of the first unit connecting hardware 410 and the second unit connecting hardware 420 . The additional connecting material 500 has a plate shape and may be coupled to the upper surface of the second unit connecting hardware 420 by welding. In addition, it may be joined to the first unit connecting hardware 410 and the upper surface by welding.,

13 and 14 are views showing a second modified example of a connecting hardware according to an embodiment of the present invention, and FIG. 15 is a view showing a third modified example of a connecting hardware according to an embodiment of the present invention.

13 and 14 , for easy coupling between the first unit connection hardware 410 and the second unit connection hardware 420 , the connection hardware 400 may include a guide. The guide 419 may have a shape protruding upward from the outer surface of the first unit connecting hardware 410 corresponding to the second cut surface 406 .

The guide 419 includes a plurality of plate parts, and a coupling space for coupling the second unit connecting hardware abdominal plate 429 may be formed between the plurality of plate parts. The plurality of plate portions may be formed to be inclined in a shape in which the mutually spaced distance increases toward the upper side. Therefore, when the second unit connecting hardware 420 falls toward the first unit connecting hardware 410, the second unit connecting hardware abdominal plate 429 can be easily seated in the coupling space in the guide 419. have.

The connecting hardware 400 may include a through hole 403 . The through-hole 403 may be formed in each of the first unit connection hardware 410 and the second unit connection hardware 420 . The through hole 403 may have a shape passing through the other side from one side of the connecting hardware 400 . The through hole 403 may be formed in an area of the first unit connecting hardware 410 buried in the girder 100 and in the area of the second unit connecting hardware 420 buried in the support member 200 . Accordingly, the concrete in the through hole 403 is buried, so that the coupling force between the connecting hardware 400 and the girder 100 , and the connecting hardware 400 and the supporting member 200 can be firmly maintained.

1, 2, 9 and 10 , the cantilever half deck 300 may be disposed on the support member 200 . As shown in FIG. 2 , the cantilever half-deck 300 may be disposed so that both ends thereof are placed on different supporting members 200 . 9 and 10 , based on a single supporting member 200 , a plurality of cantilever half-decks 300 may be disposed on the supporting member 200 with an interval G from each other.

The cantilever half-deck 300 may include a lower surface portion 310 placed on the girder 100 and the support member 200 , and a side portion 320 protruding upward from one end of the lower surface portion 310 . The lower surface portion 310 may be disposed on the upper surface of the girder 100 and the upper surface of the bottom portion 210 . The side part 320 may be disposed inside the fence part 220 . The lower surface portion 310 and the side portion 320 may be disposed perpendicular to each other. The bottom plate 190 may be formed on the upper surface of the girder 100 , the upper surface of the cantilever half-deck 300 , and the upper surface of the supporting member 200 . The cantilever half deck 300 may be disposed on the outside of the connecting hardware 400 .

A rubber pad 600 may be disposed between the lower surface of the cantilever half-deck 300 and the upper surface of the support member 200 . The rubber pad 600 may be made of a rubber material.

Meanwhile, as shown in FIG. 15 , the bottom plate 190 may have a lateral inclination for drainage treatment. For example, as in (a) of FIG. 15, the bottom plate 190 may have an outwardly downward inclination, or as in FIG. 15(b), the bottom plate 190 may have an outwardly upward inclination. . In this case, the support member 200 and the cantilever half-deck 300 may also be inclined with respect to the girder 100 to correspond to the inclination angle of the bottom plate 190 .

16 and 17 are views illustrating a fourth modified example of a connecting hardware according to an embodiment of the present invention.

16 and 17 , the reinforcing bar 700 and the tension member 800 may be disposed in the cantilever half-deck 300 .

The reinforcing bar 700 may be disposed at a position corresponding to the first region of the supporting member 200 on which the connecting reinforcing bar 240 is disposed. The reinforcing bars 700 protrude from each of the plurality of cantilever half-decks 300 , and the reinforcing bars between adjacent cantilever half-decks 300 may be mutually joined in a region therebetween as shown in FIG. 16 .

A connection bolt may be disposed at a position corresponding to the second region of the support member 200 .

So far, the cantilever structure for a bridge according to the present invention has been studied in detail through the drawings.

According to the cantilever structure for a bridge as described above, there is an advantage in that the cantilever can be quickly and easily installed on the girder by assembling the girder and the supporting member through the connecting hardware.

In addition, since a separate dismantling process is unnecessary, the process is simplified, and there is an advantage in that it is possible to prevent a safety accident of an operator.

In addition, since it is possible to block the occurrence of deflection during the construction process and to provide a structure that can transmit the load stably to the girder, there is an advantage of securing structural stability.

Hereinafter, a cantilever structure for a bridge according to a second embodiment of the present invention will be described.

In this embodiment, other parts are the same as in the first embodiment, except that there is a difference according to the shape of the connecting hardware and the coupling structure of the connecting hardware. Therefore, in the following, only the characteristic parts of the present embodiment will be described, and the description of the above-described embodiment will be used for the remaining parts.

In addition, the same reference numerals are given to the same components as those of the above-described embodiment and will be described.

18 is a perspective view of a cantilever structure according to a second embodiment of the present invention, FIG. 19 is a perspective view showing a coupling structure of a girder and a support member according to a second embodiment of the present invention, and FIG. 20 is a first embodiment of the present invention. It is a perspective view showing a state in which the first unit connecting hardware is coupled on the girder according to the second embodiment, and FIG. 21 is a perspective view showing the coupling structure of the supporting member and the connecting hardware according to the second embodiment of the present invention, FIG. 22 is a view showing FIG. 21 from another angle, FIG. 23 is a perspective view of a connecting hardware according to a second embodiment of the present invention, and FIG. 24 is a view showing FIG. 23 from another angle.

18 to 24 , the cantilever structure for a bridge according to the second embodiment of the present invention may include a support member 200 , a cantilever half deck 300 , and a connecting hardware 1400 .

The girder 100 may be disposed on an abutment or a pier. A plurality of girders 100 may be provided to be spaced apart from each other. The girder 100 may be an I-type girder made of concrete. The girder 100 may include an upper flange 120 , a lower flange (not shown) and an abdomen 110 .

The support member 200 may be coupled to a side surface of the upper flange 120 . The supporting member 200 is provided in plurality along the longitudinal direction of the girder 100, and may be equally installed at regular intervals. The supporting member 200 is precast and may be coupled to the girder 100 through the connecting hardware 1400 as shown in FIG. 18 . The support member 200 supports the cantilever half-deck 300 and is coupled to the bottom plate to act as a single structure.

The support member 200 may include a bottom portion 210 and a fence portion 220 . The bottom part 210 may be coupled to the side surface of the upper flange 120 . The bottom portion 210 may be disposed at the same height as the upper flange 120 in a right angle direction. The fence part 220 is formed to extend upwardly from an end of the bottom part 210 , and may be disposed perpendicular to the bottom part 210 . The fence part 220 may have a shape protruding upward from the top surface of the bottom part 210 .

A chamfered surface may be formed in a corner region connecting the lower surface of the bottom part 210 and the outer surface of the fence part 220 . The outer surface of the fence unit 220 may be an inclined surface having a shape in which the thickness of the fence unit 220 becomes thinner as it goes upward.

The fence unit 220 serves as a formwork to prevent water leakage when the concrete floor plate is poured. In addition, the cantilever half-deck 300 is prevented from departing to the outside, thereby increasing construction stability. In addition, there is an advantage in that the construction accuracy of the cantilever half deck 300 can be improved by forming the outermost boundary of the bottom plate. There is an advantage of forming a safety handrail at the top of the fence unit 220 to increase the safety of the operator.

The support member 200 may include a connecting reinforcing bar 240 . As shown in FIG. 18 , a part of the connecting reinforcing bar 240 may be disposed in the support member 200 , and the other part may protrude upward from the upper surface of the support member 200 to be exposed to the outside.

The coupling between the support member 200 and the cantilever half deck 300 and the bottom part 210 can be firmly maintained through the connecting reinforcing bar 240 . A plurality of connecting reinforcing bars 240 may be provided to be spaced apart from each other in the longitudinal direction of the support member 200 . The cross-sectional shape of the connecting reinforcing bar 240 protruding upward of the support member 200 may be a rectangle. An area of the support member 200 in which the connecting reinforcing bar 240 is disposed may be defined as a first area. In addition, the region of the support member 200 in which the connecting hardware 1400 is disposed may be defined as the second region.

The support member 200 may include a first groove 1215 (refer to FIG. 21 ). The first groove 1215 may be recessed to a predetermined depth from the top on the end surface of the support member 200 facing the upper flange 120 of the girder 100 . A plurality of first grooves 1215 may be provided to be symmetrically disposed in the center. The first groove 1215 provides a space for fastening the bolt 1450 (refer to FIG. 21 ) when connecting the upper flange 120 and the support member 200 .

The connecting hardware 1400 may connect the girder 100 and the support member 200 to each other. The connecting hardware 1400 may be disposed between the girder 100 and the support member 200 . The connecting hardware 1400 may be an H-shaped steel.

The connection hardware 1400 may include a first unit connection hardware 1410 and a second unit connection hardware 1420 . The first unit connection hardware 1410 and the second unit connection hardware 1420 can be freely separated and coupled to each other through bolt fastening. The first unit connecting hardware 1410 may be coupled to the girder 100 . The first unit connecting hardware 1410 may be included in the upper flange 120 . The second unit connection hardware 1420 may be included in the support member 200 . A first unit connection hardware 1410 and a second unit connection hardware 1420 may be respectively formed by cutting an H-beam steel of a single standard.

The girder 100 and the supporting member 200 may be coupled to each other by assembling the first unit connecting hardware 1410 and the second unit connecting hardware 1420 by an operator.

A part of the first unit connecting hardware 1410 may be embedded in the girder 100 , and the rest may be disposed to protrude to the outside of the girder 100 . A part of the second unit connecting hardware 1420 may be embedded in the support member 200 , and the rest may be disposed to protrude to the outside of the support member 200 . Since the depth of the support member 200 is increased as the connecting hardware 1400 protrudes to the outside, sufficient rigidity to prevent sagging can be secured, and the installation for bolting is easy to prevent safety accidents of workers. .

A cut surface may be formed between the first unit connection hardware 1410 and the second unit connection hardware 1420 . The cut surface is formed perpendicular to the longitudinal direction of the connecting hardware 1400, and may be formed in a region dividing the connecting hardware 1400 in about half. The cut surface may be formed along the vertical direction of the connecting hardware 1400 . When the support member 200 and the girder 100 are coupled, the surfaces corresponding to the cut surfaces of the first unit connecting hardware 1410 and the second unit connecting hardware 1420 may be disposed to face each other or may be in contact with each other.

The first unit connection hardware 1410 and the second unit connection hardware 1420 may be coupled to each other through a plurality of coupling parts. The plurality of coupling parts may include an upper coupling part 1470 and lower coupling parts 1430 and 1440 .

The upper coupling part 1470 may be disposed on the upper surfaces of the first unit connection hardware 1410 and the second unit connection hardware 1420 . A part of the upper coupling part 1470 may be coupled to the upper surface of the first unit connection hardware 1410 , and the remaining part may be coupled to the top surface of the second unit connection hardware 1420 . The upper coupling part 1470 may be coupled to the upper surface of the second unit connecting hardware 1420 by welding. The upper coupling part 1470 may be coupled to the upper surface of the first unit connection hardware 1410 by welding.

A plurality of upper coupling portions 1470 may be provided to be spaced apart from each other. For example, the upper coupling part 1470 may include a first upper coupling part 1472 and a second upper coupling part 1474 .

Meanwhile, a guide 1480 may be disposed on the upper surface of the first unit connection hardware 1410 . The guide 1480 may be disposed between the first upper coupling part 1472 and the second upper coupling part 1474 . The guide 1480 may have a shape in which a central portion protrudes upward. The guide 1480 may be formed in a “∧” shape in cross section. Therefore, in the process in which the second unit connection hardware 1420 to which the first upper coupling part 1472 and the second upper coupling part 1474 are coupled is coupled to the first unit connection hardware 1410, the guide 1480 is Through this, the coupling direction of the second unit connecting hardware 1420 may be guided to the cut surface of the first unit connecting hardware 1410 .

Meanwhile, the connecting hardware 1400 may include a through hole 1403 . The through hole 1403 may be formed in each of the first unit connection hardware 1410 and the second unit connection hardware 1420 . The through hole 1403 may have a shape penetrating the other side from one side of the connecting hardware 400 . The through hole 1403 may be formed in the area of the first unit connecting hardware 1410 buried in the girder 100 and in the area of the second unit connecting hardware 1420 buried in the support member 200 . Accordingly, there is an advantage in that the concrete in the through hole 1403 is buried, and the bonding force between the connecting hardware 1400 and the girder 100 , and the connecting hardware 1400 and the supporting member 1200 can be firmly maintained.

The lower coupling parts 1430 and 1440 may be disposed below the upper coupling part 1470 . The lower coupling parts 1430 and 1440 may be disposed on the abdomen 1414 of the first unit connection hardware 1410 and the abdomen 1424 of the second unit connection hardware 1420 . The lower coupling portions 1430 and 1440 may have a plate shape. A plurality of lower coupling portions 1430 and 1440 may be provided, respectively, disposed on both sides of the abdomen 1414 of the first unit connection hardware 1410 and the abdomen 1424 of the second unit connection hardware 1420. .

The lower coupling parts 1430 and 1440 are a first lower coupling part 1430 coupled to the first unit connection hardware 1410 and a second lower coupling part 1440 coupled to the second unit connection hardware 1420. may include The first lower coupling part 1430 and the second lower coupling part 1440 may be in surface contact with each other. The first lower coupling part 1430 and the second lower coupling part 1440 may be screwed through a bolt 1450 . The bolt 1450 may be disposed to pass through the first lower coupling portion 1430 and the second lower coupling portion 1440 , and may be coupled to a nut. A plurality of bolts 1450 may be provided to be spaced apart from each other in the vertical direction.

The lower coupling parts 1430 and 1440 may be disposed perpendicular to the upper coupling part 1470 . The lower coupling parts 1430 and 1440 and the upper coupling part 1470 may be disposed to overlap in the vertical direction.

In the above, even though it has been described that all the components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more.

In addition, terms such as 'include', 'comprise', or 'have' described above mean that the component may be inherent unless otherwise stated, so other components are excluded. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. 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 according to the present invention should be interpreted by the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: cantilever structure for bridge 100: girder
110: abdomen plate 120: upper flange
130: lower flange 190: bottom plate
200: support member 210: bottom
220: fence unit 240: connecting reinforcing bar
300: cantilever 310: lower part
320: side part 400: connecting hardware
410: connecting hardware 420: second unit connecting hardware
430: first coupling part 435: first bolt
440: second coupling part 500: additional connection material
600: rubber pad 700: reinforcing bar
800: tension material

Claims (10)

girder;
a support member made of precast disposed on the side surface of the girder;
a connecting hardware connecting the girder and the supporting member; and
and a cantilever disposed on the support member;
The connecting hardware is
at least part of the first unit connecting hardware is embedded in the girder and the other part is exposed to the outside of the girder; and
at least a part of the second unit connecting hardware is embedded in the supporting member and the other part is exposed to the outside of the supporting member to be coupled to the first unit connecting hardware;
The first unit connecting iron and the second unit connecting iron are formed by cutting a single H-beam,
A first lower coupling part is disposed in a space formed by the abdomen of the first unit connection hardware, an upper portion of the first unit connection hardware, and a lower portion of the first unit connection hardware,
A second lower coupling portion is disposed in a space formed by the abdomen of the second unit connecting hardware, an upper portion of the second unit connecting hardware, and a lower portion of the second unit connecting hardware,
The cantilever structure for a bridge in which the first lower coupling part and the second lower coupling part are screwed through a bolt. delete delete According to claim 1,
The connection hardware includes a cut surface disposed between the first unit connection hardware and the second unit connection hardware,
The cut surface is a cantilever structure for a bridge perpendicular to a longitudinal direction of the first unit connecting iron and the second unit connecting iron. 5. The method of claim 4,
A cantilever structure for a bridge in which an upper coupling portion is disposed on an upper surface of the first unit connecting hardware and an upper surface of the second unit connecting iron. 5. The method of claim 4,
A cantilever structure for a bridge in which epoxy is disposed between the first unit connecting iron and the second unit connecting iron corresponding to the cut surface. 6. The method of claim 5,
The upper coupling portion includes a first upper coupling portion and a second upper coupling portion disposed to be spaced apart from each other,
The cantilever structure for a bridge including a guide disposed between the first upper coupling part and the second upper coupling part on an upper surface of the first unit connecting hardware. According to claim 1,
The support member includes a bottom part coupled to the side surface of the girder, and a fence part protruding upward from an end of the bottom part,
The cantilever may include an upper surface of the bottom portion, a lower surface portion disposed on the upper surface of the girder, and a side portion disposed inside the fence portion. According to claim 1,
A cantilever structure for a bridge including a connecting reinforcing bar partly embedded in the support member and the other part protruding upward from the upper surface of the support member. According to claim 1,
The connecting hardware is a cantilever structure for a bridge including a through hole through which the concrete is embedded by passing through the other side from one side.

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