KR102490192B1 - Bridge upper structure and the method constructing bridge upper structure using the same - Google Patents

Abstract

The present invention relates to a bridge superstructure with a displacement accommodating steel crossbeam and a bridge superstructure construction method using the same. The bridge superstructure comprises: a first I-steel girder which includes a first lower flange, a first upper flange, and a first web; a second I-steel girder which includes a second lower flange, a second upper flange, and a second web, and is arranged at a girder interval in the transverse direction relative to the first steel girder; and a steel crossbeam which is provided to connect a first vertical reinforcement provided on one side in the transverse direction of the first web and a second vertical reinforcement provided on the other side in the transverse direction of the second web. The steel crossbeam includes a horizontal member which extends in the transverse direction, and a first inclined spacer member, which extends to be inclined upward toward the one side in the transverse direction and is connected to the one side of the horizontal member in the transverse direction. The first vertical reinforcement includes a first vertical member which extends upwardly from the first lower flange along one side in the transverse direction of the first web, and a first facing member which is connected to the first inclined spacer member to face each other. The first inclined spacer member has a first long slot extending along the transverse incline, such that the first inclined spacer member can be fixed to the first facing member through a first fastening unit installed with respect to the first slot. Therefore, the bridge superstructure allows for easy removal of the bridge deck formwork and maintains or further enhances the aesthetics of the bridge.

Description

Bridge upper structure with displacement-accepting steel crossbeam and bridge upper construction method using the same

The present application relates to a bridge superstructure having a displacement-accepting steel crossbeam and a bridge superstructure construction method using the same.

Previously, to install the formwork for constructing the floor plate (slab) on the upper part of the bridge, a shoring structure supporting the floor plate formwork was installed. However, this shoring structure is a complex structure that extends from the ground to the bottom plate at the top of the bridge, and is one of the causes of poor workability and workability and long construction period. In particular, when a road is located on the lower part of the upper part of a bridge, such as the construction of a downtown bridge, there is an inconvenience in that traffic control must be performed for the installation of a stilt structure. In addition, when constructing a water bridge, there were also limitations that made it difficult to install a shoring structure.

In order to overcome the limitations of the upper deck construction method of the bridge using such an existing shoring structure, the present applicant developed a temporary reinforcing girder for supporting the formwork for deck concrete pouring in Korean Patent Registration No. 10-2175920, Although its use was made unnecessary, the limitations of being a temporary structure installed only for the purpose of floor plate construction (deterioration in workability due to the addition of work processes for disassembly, extension of construction period, deterioration of aesthetics even assuming permanent retention, and permanent retention in performing its role as a reinforcing structure limitations, etc.).

The present application is intended to solve the above-mentioned problems of the prior art, and the use of shores is unnecessary for arranging the formwork for deck construction, and even if it is permanently maintained after installation, it is easy to remove the deck formwork, etc., and the bridge aesthetics also compare to the existing ones. It is an object of the present invention to provide a bridge superstructure that can be maintained or improved and a bridge superstructure construction method using the same.

However, the technical problems to be achieved by the embodiments of the present application are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, a bridge superstructure according to an embodiment of the present application includes a first I-shaped first girder including a first lower flange, a first upper flange, and a first web; A second girder having an I shape including a second lower flange, a second upper flange, and a second web, and disposed at a girder interval on the other side in the transverse direction with respect to the first girder; And a first vertical stiffener provided on the other side in the transverse direction of the first web and a second vertical stiffener provided on one side of the second web in the transverse direction. A horizontal member extending to, and a first inclined spacer member extending obliquely upward toward one side in the transverse direction and connected to one side in the transverse direction of the transverse member, wherein the first vertical stiffener is formed from the first lower flange to the first A first vertical member extending upward along one side of one web in a transverse direction, and a first opposing member connected to the first inclined spacer member to face each other, wherein the first inclined spacer member extends along a transverse slope A first slot hole in the form of an elongated hole may be formed, and the first inclined spacer member may be fixed to the first opposing member through a first fastening unit installed in the first slot hole.

In addition, the river robo extends obliquely upward toward the other side in the transverse direction and includes a second inclined spacer member connected to the other side in the transverse direction of the transverse member, and the second vertical stiffener, from the second lower flange 2 includes a second vertical member extending upward along the other transverse side of the web, and a second opposing member connected to the second inclined spacer member to face each other, wherein the second inclined spacer member extends along the transverse slope A second slot hole in the form of an elongated hole may be formed, and the second inclined spacer member may be fixed to the second opposing member through a second fastening unit installed in the second slot hole.

In addition, the slot extension length of the first slot hole and the slot extension length of the second slot hole are determined by the first fastening in consideration of the predicted transverse displacement generated during construction for each of the first and second steel girders. The unit may be installed in the first slot hole, and the second fastening unit may be installed in the second slot hole.

In addition, when the first steel girder and the second steel girder exceed the predicted transverse displacement and excessive displacement occurs, the second inclined spacer between the first inclined spacer member and the first opposing member and the second inclined spacer A spacer plate having a thickness capable of covering the excess displacement may be interposed between at least one of the member and the second opposing member.

In addition, the first vertical stiffener and the second vertical stiffener are provided so that the cross-robe is disposed at a position where the upper surface of the cross-robe forms a height-direction gap between the lower surface of the floor plate formed on the upper structure of the bridge, , In the height direction spacing, a lower formwork plate corresponding to the lower surface of the floor plate and a plurality of joist members extending along the longitudinal direction to support the lower formwork plate may be arranged at intervals along the transverse direction in the girder spacing area can be set to

In addition, the cross member is an I-type including a cross beam lower flange, a cross beam upper flange and a cross beam web, and the bridge superstructure is such that the lower formwork plate and the joist member can be removed after the construction of the floor plate is completed. A hydraulic jack for removing joists that separates the lower formwork plate upward from the lower flange of the crossbeam, and a hydraulic jack support installed on the lower flange of the crossbeam to protrude from the lower flange of the crossbeam in the longitudinal direction of the bridge so as to support the hydraulic jack for removing the joist. It further includes a unit, wherein the hydraulic jack for removing the joist and the hydraulic jack support unit are recovered after removal of the lower formwork plate and the joist member, and the river robot may be permanently maintained.

In addition, the cross-beam web has a thinner thickness than the cross-beam lower flange and the cross-beam upper flange, and the hydraulic jack support unit,

It is disposed to face one longitudinal side surface of the crossbeam web and an upper surface of one longitudinal side of the lower flange of the crossbeam, but protrudes more to one longitudinal side than the upper surface of one longitudinal side of the lower flange of the crossbeam so as to support the hydraulic jack for removing the joist. L-shaped member from which the bottom member extends; And a vertical reinforcing member installed with respect to the L-shaped member so as to reinforce the crossbeam web in response to the operating force during operation of the hydraulic jack for joist removal, and the hydraulic jack support unit comprises the crossbeam web and the crossbeam lower flange. It may be detachably fixed to each of the longitudinal one-side portions.

In addition, the hydraulic jack support unit further includes a gripping member bent downwardly and extending from the L-shaped member so as to surround one side portion of the lower flange in the longitudinal direction of the crossbeam in a C shape, and the hydraulic jack support unit, the L-shaped A member may be detachably fixed to the crossbeam web, and the gripping member may be detachably gripped and fixed in a form surrounding the lower flange of the crossbeam.

In addition, the bridge upper construction method using the bridge upper structure according to an embodiment of the present application includes: (a) arranging the first steel girder and the second steel girder on the bridge lower structure corresponding to the girder spacing; (b) fastening the first fastening unit to the first fastening hole formed in the first slot hole and the first opposing member, and fastening the second fastening unit to the second slot hole and the first fastening hole formed on the second opposing member; Installing the Ganga Robo by fastening to a second fastening hole; (c) arranging a plurality of joist members on the river robo, and arranging a lower formwork plate for constructing a floor plate on the plurality of joist members arranged; and (d) removing the plurality of joist members and the lower formwork plate using a hydraulic jack for removing joists after completion of the construction of the floor plate, and leaving the riverside robot.

The above-described problem solving means are merely exemplary and should not be construed as intended to limit the present disclosure. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-mentioned problem solving means of the present application, the use of shores is unnecessary, even if it is permanently maintained after installation, it is easy to remove the bottom plate formwork, etc., and the appearance of the bridge can be maintained or improved compared to the existing bridge superstructure and using the same A bridge top construction method may be provided.

In addition, according to the above-described problem solving means of the present application, a steel girder having an inclined spacer member having a long hole-shaped slot hole is installed between neighboring steel girders, which can occur between neighboring steel girders during construction A more flexible bridge upper construction process capable of accommodating (covering) displacement within a predetermined range can be provided. In other words, a long hole-shaped first slot hole is formed along the lateral inclination in the first inclined spacer member and a long hole-shaped second slot hole is formed in the second inclined spacer member along the lateral inclination, so that the first Even if transverse displacement occurs in each of the steel girder and the second steel girder, the first fastening unit can be installed in the first slot hole and the second fastening unit can be installed in the second slot hole.

In addition, according to the above-described problem solving means of the present application, the river robo includes a first inclined spacer member extending obliquely upward toward one side in the transverse direction, and the first vertical stiffener is connected to the first inclined spacer member to face each other. 1 By including the opposing member, a higher friction fixing force can be secured compared to the crossbeam of the existing erected form.

In addition, according to the above-described problem solving means of the present application, when the bridge superstructure includes the spacer plate, the first steel girder and the second steel girder exceed the lateral displacement predicted value and cause excessive displacement away from each other, the first A spacer plate is interposed between at least one of the inclined spacer member and the first opposing member or between the second inclined spacer member and the second opposing member, so that excessive displacement can be covered and the first fastening unit is installed in the first slot hole. It is possible, and the second fastening unit may be installed with respect to the second slot hole.

In addition, according to the above-described problem solving means of the present application, the bridge upper structure includes a hydraulic jack support unit installed on the lower flange of the crossbeam so as to protrude from the lower flange of the crossbeam in the longitudinal direction of the bridge, so that the hydraulic jack support unit supports the hydraulic jack for removing joists. It is possible, and after the construction of the floor plate is completed, the hydraulic jack for removing the joist can remove the lower formwork plate and the joist member by separating the lower formwork plate upward from the lower flange of the crossbeam.

1 is a schematic perspective view of installing a steel crossbeam to a first steel girder and a second steel girder of a bridge superstructure according to an embodiment of the present invention.
Figure 2 is a schematic cross-sectional view for explaining a bridge superstructure according to an embodiment of the present application in a state in which the floor plate is completed for the steel girder and the steel crossbeam.
3 is a schematic perspective view for explaining a river robo of a bridge superstructure according to an embodiment of the present disclosure.
4 is a schematic conceptual diagram for explaining a conventional Ganga Robo.
5A is a schematic conceptual diagram for explaining a first inclined spacer member or a second inclined spacer member of a river robo of a bridge superstructure according to an embodiment of the present disclosure.
5B is for explaining a state in which a first fastening unit is coupled to a first inclined spacer member of a river robo of a bridge superstructure or a state in which a second fastening unit is coupled to a second inclined spacer member according to an embodiment of the present disclosure; It is a schematic conceptual diagram.
6 is a schematic conceptual diagram for explaining a state in which steel crossbeams are installed according to transverse displacement generated during construction for each of the first and second steel girders of the bridge superstructure according to an embodiment of the present invention.
7a to 7d show that a steel crossbeam is installed between the first and second steel girders of the bridge superstructure according to an embodiment of the present application, then a plurality of joists are arranged (installed), and a formwork for deck construction is It is a schematic cross-sectional view for sequentially explaining the process of installing and constructing the floor plate.
8 shows excess displacement exceeding the predicted transverse displacement of the first and second girder of the bridge superstructure according to an embodiment of the present application (the distance between the first girder and the second girder increases) It is a schematic cross-sectional view for explaining the installation state of the river robo in which excess displacement is covered through the interposition of the spacer plate in the situation.
9 is a schematic cross-sectional view for explaining a state in which a hydraulic jack for removing a joist and a hydraulic jack support unit for removing a joist member after placing a floor plate (slab) of a bridge superstructure according to an embodiment of the present invention are installed.
10 is a schematic longitudinal sectional view for explaining a method of fixing a hydraulic jack for joist removal and a hydraulic jack support unit (hydraulic jack support system) to a steel crossbeam of a bridge superstructure according to an embodiment of the present invention.
11 is a schematic longitudinal cross-sectional view for explaining a method of fixing a hydraulic jack support unit including a hydraulic jack for removing joists and a gripping member to a steel crossbeam of a bridge superstructure according to an embodiment of the present disclosure.
12 is a flowchart illustrating a method of constructing an upper bridge using a bridge upper structure according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" to another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element in between. do.

Throughout the present specification, when a member is referred to as being “on,” “above,” “on top of,” “below,” “below,” or “below” another member, this means that a member is located in relation to another member. This includes not only the case of contact but also the case of another member between the two members.

Throughout the present specification, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

Hereinafter, a bridge superstructure (hereinafter referred to as 'this bridge superstructure') according to an embodiment of the present application will be described. For reference, the present bridge superstructure may refer to a bridge superstructure including a steel girder and a steel crossbeam but not including a floor plate, but is not limited thereto. The present bridge superstructure may be a bridge superstructure including a floor plate or a bridge superstructure including a floor plate and auxiliary facilities.

Figure 1 is a schematic perspective view of installing a river cross for the first and second steel girders of a bridge superstructure according to an embodiment of the present application, Figure 2 is a state in which the construction of the floor plate is completed for the steel girder and the steel cross It is a schematic cross-sectional view for explaining a bridge superstructure according to an embodiment of the present application.

Referring to FIGS. 1 and 2 , the bridge superstructure 1000 includes a first girder 100, a second girder 200, and a girder 300. For example, the first steel girder 100 and the second steel girder 200 may be steel girders 100 and 200 adjacent to each other while being spaced apart at intervals (preset intervals) in the transverse direction of the bridge.

Referring to FIGS. 1 and 2 , the first steel girder 100 may include a first lower flange 101 , a first upper flange 102 and a first web 103 . That is, the first steel girder 100 may be I-shaped. In the standard of I-beam or H-beam, the first web 103 may be provided with a thinner thickness than the first lower flange 101 and the first upper flange 102.

In addition, referring to FIGS. 1 and 2 together, the first steel girder 100 is provided so that the first lower flange 101, the first upper flange 102 and the first web 103 extend in the longitudinal direction. It can be.

Referring to FIG. 2 , the first steel girder 100 may be provided with a first vertical stiffener 110 on the other transverse side of the first web 103 (3 o'clock direction in FIG. 2). Illustratively, referring to FIG. 2, the first vertical stiffener 110 is connected to the lower surface of the first lower flange 101, and one side in the transverse direction is connected to the other side in the transverse direction of the first web 103 can

Also, referring to FIGS. 1 and 2 , the second steel girder 200 may include a second lower flange 201 , a second upper flange 202 and a second web 203 . That is, the second steel girder may be I-shaped. In the standard of I-beam or H-beam, the second web 203 may be provided with a thinner thickness than the second lower flange 201 and the second upper flange 202.

In addition, referring to FIGS. 1 and 2 together, the second steel girder 200 is provided so that the second lower flange 201, the second upper flange 202 and the second web 203 extend in the longitudinal direction. It can be.

Referring to FIG. 2, the second steel girder 200 is the girder spacing (preset girder spacing in design, construction There may be errors) and may be placed.

Referring to FIG. 2, the second steel girder 200 may be provided with a second vertical stiffener 210 on one side of the second web 203 in the transverse direction (9 o'clock direction in FIG. 2). Illustratively, referring to FIG. 2, the second vertical stiffener 210 is connected to the lower surface of the second lower flange 201 and the other side in the transverse direction is connected to one side in the transverse direction of the second web 203 can

In addition, for example, referring to FIG. 1, the first vertical stiffener 110 and the second vertical stiffener 210 are in the longitudinal direction of the first steel girder 100 and the second steel girder 200 (based on FIG. 1). , 2 o'clock - 8 o'clock direction) may be disposed at intervals, and may be disposed and provided at positions corresponding to each other in the transverse direction (opposite).

Referring to FIGS. 1 and 2 , the river robo 300 may be provided to connect the first vertical stiffener 110 and the second vertical stiffener 210 .

Referring to FIG. 1, a plurality of river robos 300 are arranged at intervals along the longitudinal direction of the first girder 100 and the second girder 200 (2 o'clock to 8 o'clock direction in FIG. 1) The first vertical stiffener 110 and the second vertical stiffener 210 may be provided in plurality to connect to each other.

3 is a schematic perspective view for explaining a river robo of a bridge superstructure according to an embodiment of the present disclosure.

Referring to FIGS. 2 and 3 , the river crossing 300 may include a horizontal member 310 , a first inclined spacer member 320a and a second inclined spacer member 320b.

Referring to FIGS. 2 and 3 , the horizontal member 310 may extend in a transverse direction (3 o'clock to 9 o'clock direction in FIG. 2 and 2 o'clock to 8 o'clock direction in FIG. 3 ). In addition, the cross member 310 may be an I-type including a cross beam lower flange 311, a cross beam upper flange 312 and a cross beam web 313. In addition, the cross-beam 300 may have a thin thickness in which the cross-beam web 313 is thinner than the cross-beam lower flange 311 and the cross-beam upper flange 312 in terms of the I-beam or H-beam standard.

In addition, referring to FIGS. 2 and 3, the first inclined spacer member 320a is inclined upward toward one side in the horizontal direction (9 o'clock direction in FIG. 2 and 8 o'clock direction in FIG. 3) (9 o'clock direction in FIG. 2 and It extends at an oblique angle between the 12 o'clock directions) and may be connected to one side of the transverse member 310 in the transverse direction (for example, welded connection). For example, the first inclined spacer member (320a) extends obliquely upward toward one side in the transverse direction from one transverse end of the crossbeam lower flange 311 and is connected to one transverse end of the crossbeam upper flange 312.

In addition, referring to FIGS. 2 and 3, the second inclined spacer member 320b is inclined upward toward the other side in the horizontal direction (3 o'clock direction in FIG. 2 and 2 o'clock direction in FIG. 3) (3 o'clock direction in FIG. 2 and at an oblique angle between the 12 o'clock directions) and may be connected to the other side of the horizontal member 310 in the transverse direction. For example, the second inclined spacer member 320b extends obliquely upward from the other transverse end of the crossbeam lower flange 311 toward the other transverse side and is connected to the other transverse end of the crossbeam upper flange 312.

In addition, referring to FIGS. 2 and 3, the transverse member 310 of the river crossing 300 corresponds to the inclination of the first inclined spacer member 320b and the inclination of the second inclined spacer member 320b, Crossbeam upper flange 312 may be provided with a longer length extending in the transverse direction than the crossbeam lower flange 311 .

Meanwhile, referring to FIGS. 1 and 2 , the first vertical stiffener 110 may include a first vertical member 111 and a first opposing member 112 . The first vertical member 111 may extend upward from the first lower flange 101 along one side of the first web 103 in the transverse direction (3 o'clock direction in FIG. 2). For example, the first vertical member 111 extends upward along one side of the first web 103 in the transverse direction from the first lower flange 101, and the height of the upward extension is relative to the present bridge superstructure 1000. The height at which these components can be placed for the construction of the floor plate 500 in consideration of the height of the lower surface of the floor plate 500, the thickness of the formwork in the height direction, the thickness of the joist line, and the height direction thickness of the steel crossbeam. It is desirable to extend as much as

Also, referring to FIGS. 1 and 2 , the first opposing member 112 may be connected to the first inclined spacer member 320a to face each other. Here, the reason why the first opposing member 112 is connected to the first inclined spacer member 320a to face each other is that, for example, the other side of the first opposing member 112 is the first inclined spacer member 320a. It may be connected by direct contact with one side facing each other, but is not limited thereto. As another example, the first opposing member 112 is connected to the first inclined spacer member 320a to face each other in a state in which a spacer plate 400 to be described later is interposed therebetween (see FIG. 8) to face the first opposing member 112. Since the other side surface of the member 112 is disposed to face the one side surface of the first inclined spacer member 320a, they are not in direct contact with each other, but may be indirectly connected to each other. That is, that the first opposing member 112 and the first inclined spacer member 320a are connected to face each other can be broadly understood as a connection concept including not only direct connection but also indirect connection.

Like the first inclined spacer member 320a, the first opposing member 112 may be provided so as to be connected to the first inclined spacer member 320a to face each other, and to be inclined upward toward one side in the lateral direction. That is, the first opposing member 112 may be provided with the same inclination so as to face the first inclined spacer member 320a in parallel.

In addition, the first vertical stiffener 110 may include an upper extension member that extends from one end of the first opposing member 112 to one side in the transverse direction and is connected to the other side of the first web 103 in the transverse direction. .

Also, referring to FIGS. 1 and 2 , the second vertical reinforcing member 210 may include a second vertical member 211 and a second opposing member 212 . The second vertical member 211 may extend upward from the second lower flange 201 along the other transverse side of the second web 203 (9 o'clock direction in FIG. 2). For example, the second vertical member 211 extends upward along the other transverse side of the second web 203 from the second lower flange 201, and the height of the upward extension is, relative to the bridge superstructure 1000 The height at which these components can be placed for the construction of the floor plate 500 in consideration of the height of the lower surface of the floor plate 500, the thickness of the formwork in the height direction, the thickness of the joist line, and the height direction thickness of the steel crossbeam. It is desirable to extend as much as

Also, referring to FIGS. 1 and 2 , the second opposing member 212 may be connected to the second inclined spacer member 320b to face each other. Here, the second facing member 212 and the second inclined spacer member 320b are connected to face each other, for example, one side of the second facing member 212 is the second inclined spacer member 320b. It may be connected by direct contact with the other side facing each other, but is not limited thereto. As another example, when the second opposing member 212 is connected to the second inclined spacer member 320b to face each other, a spacer plate 400 to be described later is interposed therebetween (see FIG. 8), and the second opposing member 212 faces the second inclined spacer member 320b. One side surface of the member 212 is arranged to face the other side surface of the second inclined spacer member 320b, so that they are not in direct contact with each other, but may be indirectly connected to each other. That is, that the second opposing member 212 and the second inclined spacer member 320b are connected to face each other can be broadly understood as a connection concept including not only direct connection but also indirect connection.

The second opposing member 212 may be provided so as to be connected to the second inclined spacer member 320b to face each other, so as to be inclined upward toward the other side in the horizontal direction, like the second inclined spacer member 320b. That is, the second opposing member 212 may be provided with the same inclination to face the second inclined spacer member 320b side by side.

In addition, the second vertical stiffener 210 may include an upper extension member extending from the other end of the second opposing member 212 to the other side in the transverse direction and connected to one side of the second web 203 in the transverse direction. .

The structure of the first vertical stiffener 110 and the second vertical stiffener 210 is a structure (vertical member) that prevents the first steel girder 100 and the second steel girder 200 from being overturned and a lower formwork plate to be described later. It may be a structure (opposite member) for coupling with the river robo 300 to facilitate installation of the 600.

4 is a schematic conceptual diagram for explaining a conventional Ganga Robo.

Referring to FIG. 4, the conventional steel crossrobo (1) has a structure in which the normal direction of the surface is directed in the horizontal direction (longitudinal direction, bridge direction) with respect to the vertical reinforcement connected to the web of two adjacent steel girders. had That is, the conventional Ganga Robo 1 was provided in the form of an erected plate. In the case of the steel girder (1) in the form of a plate erected in this way, fixation to the two steel girders was maintained by the bolt shear resistance and the surface friction resistance caused by the bolt pressure, but if at least one of the two steel girders is rotated for various reasons during construction (For example, when pouring concrete for deck construction, at least one of the two steel girders is rotated slightly in the longitudinal direction by the moment acting as a girder at the both ends of the cantilever side in the transverse direction of the deck due to the weight of the unhardened concrete. etc.) could not be prevented and the bolt easily slides along the slot hole (long hole) formed in the river robot.

On the other hand, referring to FIGS. 1 to 3, the river robo 300 of the present bridge superstructure 1000 has a first inclined spacer member 320a and a second inclined spacer member (320a) extending obliquely upward toward one side in the transverse direction 320b), the first vertical stiffener 110 includes a first opposing member 112 connected to the first inclined spacer member 320a to face each other, and the second vertical stiffener 210 includes a second inclined spacer member 320a. By including the spacer member 320b and the second opposing member 212 connected opposite to each other, the fastened bolt (fastening unit) has a combined resistance of shear resistance and tensile resistance, and to surface friction caused by bolt acupressure The pressing frictional force due to the weight of the Ganga Robo 300 can be added, and the surface friction area can also be increased according to the length extending (extended) in the longitudinal direction, so that a higher level of surface frictional resistance can be implemented.

On the other hand, Figure 5a is a schematic conceptual diagram for explaining the first inclined spacer member or the second inclined spacer member of the river cross of the bridge superstructure according to an embodiment of the present application, Figure 5b is a bridge according to an embodiment of the present application It is a schematic conceptual diagram for explaining a state in which the first fastening unit is coupled to the first inclined spacer member of the upper structure or a state in which the second fastening unit is coupled to the second inclined spacer member of the upper structure.

In addition, FIG. 6 is a schematic conceptual diagram for explaining a state in which steel crossbeams are installed according to transverse displacement generated during construction for each of the first and second steel girders of the bridge superstructure according to an embodiment of the present invention. . In more detail, (a) of FIG. 6 is a state in which a steel crossbeam is installed when transverse displacement does not occur during construction with respect to at least one of the first and second steel girders of the bridge superstructure according to an embodiment of the present application It is a schematic conceptual diagram for illustratively explaining (for example, a state in which the center of a slot hole coincides with the center of a hole of an opposing member), and FIG. 6(b) is a first steel structure of a bridge superstructure according to an embodiment of the present application. It is a schematic conceptual diagram for explaining the state in which the steel crossrobe is installed when transverse displacement occurs in at least one of the girder and the second steel girder during construction.

In addition, FIGS. 7A to 7D show that a steel crossbeam is installed between the first and second steel girders of the bridge superstructure according to an embodiment of the present application, then a plurality of joists are arranged (installed), and for deck construction It is a schematic cross-sectional view for sequentially explaining the process of installing a formwork and constructing a floor plate. FIG. 8 is a predicted transverse displacement value of the first steel girder and the second steel girder of a bridge superstructure according to an embodiment of the present invention It is a schematic cross-sectional view for explaining the installation state of the river robo in which the excess displacement is covered through the intervening spacer plate in a situation where the excess displacement exceeds (the distance between the first and second steel girders is increased).

Referring to FIGS. 5A (a), 5B, 6, and 7A, the first slanted spacer member 320a of the river robo 300 has a long-shaped first slot hole 321a extending along a horizontal slope ) can be formed. In addition, the first inclined spacer member 320a may be fixed to the first opposing member 112 through the first fastening unit 322a installed in the first slot hole 321a.

Also, referring to FIGS. 5A(a), 5B, and 7A, a second slot hole 321b having a long hole shape extending along a horizontal slope may be formed in the second inclined spacer member 320b. In addition, the second inclined spacer member 320b may be fixed to the second opposing member 212 through the second fastening unit 322b installed in the second slot hole 321b.

For example, referring to FIGS. 6 and 7A, a first fastening hole may be formed in a position corresponding to the first slot hole 321a in the first opposing member 112, and the second opposing member 212 A second fastening hole may be formed at a position corresponding to the second slot hole 321b. At this time, the slot hole is provided in the form of a long slot (long hole form) having a length that allows the slot hole and the corresponding fastening hole to overlap with each other when the girder is arranged within the expected construction error range in the girder arrangement. It can be. In addition, the first fastening hole and the second fastening hole may be formed in a circular hole shape, but are not limited thereto. can Also, for example, referring to FIGS. 5B, 6, and 7A, the first fastening unit 322a is disposed to cross (pass through) both the first slot hole 321a and the first fastening hole. A nut is fastened to one end or both ends thereof and may include bolts for connecting and fixing the first inclined spacer member 320a and the first opposing member 112 to each other. In addition, in a state in which the second fastening unit 322b is disposed to cross (pass through) both the second slot hole 321b and the second fastening hole, a nut is fastened to one end or both ends of the second inclined spacer member ( 320b) and the second opposing member 212 may include bolts for connecting and fixing each other. That is, the first fastening unit 322a and the second fastening unit 322b may be bolt fastening units using bolts and nuts, and various auxiliary units used in bolt nut fastening methods such as conventional washers may also be used. Of course, they can be included (used) together. In addition, referring to Figure 5a (b) and Figure 5a (c), the heads (heads) of the bolts of the first fastening unit (322a) and the second fastening unit (322b) or nuts are slot holes or fastening holes. It is preferable to have a larger size (diameter or width) than the width (longitudinal width) of the slot hole or the diameter or width of the fastening hole so as not to escape through the hole.

5a, 5b, 6 and 7, the slot extension length of the first slot hole 321a and the slot extension length of the second slot hole 321b are the first steel girder 100 and the second steel girder (200) The first fastening unit 322a can be installed in the first slot hole 321a, and the second fastening unit 322b is the second slot hole It can be set to be installable for (321a). For example, the lateral displacement generated during construction may be caused by manufacturing errors of the first steel girder 100 or the second steel girder 200 or construction errors during arrangement. In addition, the displacement in the yellow direction is the bending moment applied during deck construction even after the steel girder is placed (exemplarily, referring to FIG. It can be caused by various factors such as the bending moment acting on the girder side due to the cantilever part of That is, the transverse displacement generated during construction is before the river crossing 300 is installed with respect to the first opposing member 112 and the second opposing member 212 or before the river crossing 300 is installed on the first opposing member 112 and various lateral displacements (errors during construction) that may occur after being installed on the second opposing member 212 .

That is, the river robot 300 of the present application can easily respond to the transverse displacement of the first steel girder 100 and the second steel girder 200 by including the first slot hole 321a and the second slot hole 321b. It may be referred to as a displacement-accepting or displacement-responsive river robo.

On the other hand, referring to FIG. 8 , when the first and second steel girders 100 and 200 exceed the predicted lateral displacement and cause excessive displacement to move away from each other, the first inclined spacer member 320a and the second steel girder 320a A spacer plate 400 having a thickness capable of covering excessive displacement may be interposed between at least one of the first opposing member 112 and between the second inclined spacer member 320b and the second opposing member 212 . Here, the thickness capable of covering the excess displacement means that the thickness of the spacer plate 400 and the long hole length of the slot hole (first slot hole or second slot hole) are mutually combined so that the slot hole and the fastening hole communicate with each other (overlap). ) It can be understood as including both the thickness range in which the inclined spacer member and the opposing member can be disposed. As such, since the long hole length of the slot hole is combined together rather than depending only on the thickness of the spacer plate 400, it is possible to use the spacer plate 400 even if it is provided in the form of a multiple of the unit thickness rather than necessarily having a thickness of an exact specific value. Therefore, wider applicability can be secured.

In addition, a hole having a size into which a fastening unit (a first fastening unit or a second fastening unit) can be inserted (through) may be formed in the spacer plate 400 . The hole may be formed in the same size as or larger than the fastening hole of the opposing member (the first opposing member or the second opposing member), or may be formed in a long hole extending in the transverse direction, the same as or similar to the slot hole. According to this spacer plate 400, excessive displacement exceeding the estimated value (predicted range) of transverse displacement occurs between the two steel girders, so even when it is impossible to cover the long hole length of the slot hole, a spacer plate with an appropriate thickness By interposing between the inclined spacer member and the opposing member, it is possible to install the river crossrobo.

In other words, the spacer plate 400 is composed of the first inclined spacer 320a and the second opposing member in order to correspond to the lateral displacement of the first girder 100 and the second girder 200 (displacement of the gap between the girders). (112) and at least one of between the second inclined spacer member (320b) and the second opposing member (212) can be interposed and installed, and thus can respond to excessive displacement (insufficient lateral length of the river crossing). there is.

On the other hand, referring to FIGS. 2 and 7D, the first vertical stiffener 110 and the second vertical stiffener 210 are the bottom plate 500 formed on the bridge superstructure 1000 on the upper surface of the cross-robe 300. ) may be provided so that the river robot 300 is disposed at a position forming a height direction gap between the lower surfaces of the ).

In addition, referring to FIG. 7D, the height direction spacing is such that the joist members 700 extending along the longitudinal direction support the lower formwork plate 600 corresponding to the lower surface of the floor plate 500 in the transverse direction in the girder spacing area. It can be set to be able to place a plurality at intervals along. The lower formwork plate 600 may be provided for concrete pouring and curing for forming the bottom plate 500. In addition, the formwork for forming the bottom plate may include not only the lower formwork plate 600 but also the side formwork plates.

In addition, a plurality of joist members 700 are placed in the formwork structure including the load of the floor plate 500 (for example, the lower formwork plate installed on the joist member 700 for the construction of the floor plate). It can be provided in the number and size capable of supporting the load applied by the reinforcing bars and concrete placed in the formwork structure before it hardens. Referring to FIG. 7D, a plurality of joist members 700 extending in the longitudinal direction intersecting the river robot 300 are disposed at intervals in the transverse direction on the river robot 300, and the plurality of joist members 700 A formwork structure including a lower formwork plate 600 is disposed on the formwork structure, and reinforcement for floor plates, concrete pouring, and curing may be performed on the formwork structure. Accordingly, it is preferable to set the installation height of the river crossrobo 300 so that the joist member 700 and the lower formwork plate 600 can be disposed at the height-direction gap between the river crossrobo 300 and the bottom plate 500. Do. Accordingly, the load (concrete weight, reinforcing bar weight, formwork weight, etc.) generated during the construction of the floor plate 500 with respect to the formwork structure is supported by the joist member 700, and this joist member 700 is a steel crossrobo ( 300) can be built. Therefore, it is preferable that the river robot 300 is provided on the safety side so as to sufficiently support various combinations of such loads.

9 is a schematic cross-sectional view for explaining a state in which a hydraulic jack for removing a joist and a hydraulic jack support unit for removing a joist member after placing a floor plate (slab) of a bridge superstructure according to an embodiment of the present invention are installed, and FIG. 10 is It is a schematic longitudinal cross-sectional view for explaining a method of fixing a hydraulic jack for removing joists and a hydraulic jack support unit (hydraulic jack support system) to a river robo of a bridge superstructure according to an embodiment of the present application, and FIG. It is a schematic longitudinal cross-sectional view for explaining a method of fixing a hydraulic jack support unit including a hydraulic jack for joist removal and a gripping member to a steel crossbeam of a bridge superstructure according to the present invention.

Meanwhile, referring to FIGS. 9 to 11 , the bridge superstructure 1000 may include a hydraulic jack 800 for removing joists and a hydraulic jack support unit 810 (hydraulic jack support system). However, the hydraulic jack 800 for removing the joist and the hydraulic jack support unit 810 are components for removing the joist supporting the formwork for floor plate construction, and can be removed after removing the joist. That is, the hydraulic jack 800 for removing joists and the hydraulic jack support unit 810 may be temporary or temporary components not included in the present bridge superstructure 1000 that has been constructed.

Referring to FIG. 9, the hydraulic jack 800 for removing joists is installed on the lower formwork so that the lower formwork plate 600 and the joist member 700 can be removed after the construction (casting) of the floor plate (slab) 500 is completed. The plate 600 may be spaced upward from the lower flange 311 of the crossbeam. For example, the hydraulic jack 800 for removing joists may be installed on the lower flange 311 of the crossbeam. For example, the hydraulic jack 800 for removing joists is in the height direction (eg, upward direction, 12 o'clock direction in FIGS. 10 and 11) to space the lower formwork plate 600 upward from the lower flange 311 of the crossbeam. It may be provided (arranged) so that an acting force is applied to it. In this case, the hydraulic jack 800 may push the lower formwork plate 600 upward while the lower end is supported and the upper end is stroked upward.

A state in which the joist member 700 is separated from the lower formwork plate 600 even a little by the hydraulic jack 800 for removing joists and does not support the lower formwork plate 600 or a contact in which the frictional force between two or more is lowered to less than a predetermined level When it is in this state, the joist member 700 in the straddling state (two or more points of support) is moved in the horizontal direction (the surface normal direction in the reference drawing of FIG. Removal (removal) of the joist member 700 may be performed while releasing the state. That is, the hydraulic jack 800 for removing the joist is spaced apart so that the joist member 700 and the lower formwork plate 600 do not come into contact, or even if the joist member 700 and the lower formwork plate 600 are in contact with each other, both It may be provided so that the lower formwork plate 600 can be lifted upward so that the frictional force between them can be lowered to a level where the joist member 700 can be easily moved by manpower or a working tool. In consideration of these uses and purposes, it is desirable to appropriately set the capacity, performance, placement position, etc. of the hydraulic jack 800 for removing joists.

In addition, referring to FIGS. 10 and 11, the hydraulic jack support unit 810 is configured to support the hydraulic jack 800 for joist removal in the longitudinal direction of the bridge from the lower flange 311 of the crossbeam (3 o'clock in FIGS. 10 and 11). It may be installed on the lower flange 311 of the crossbeam so as to protrude in the 9 o'clock direction, in the direction of the surface normal of the drawing based on FIG. 9). That is, the Ganga Robo 300 is a transverse member extending in the lateral direction of the bridge (and the hydraulic jack support unit 810 may be disposed to protrude toward the longitudinal direction of the bridge, which is the side of the Ganga Robo 300. For example, 10, the hydraulic jack support unit 810 is fixed to the crossbeam lower flange 311 and the crossbeam web 313, and may be provided to protrude more in the longitudinal direction than the crossbeam lower flange 311. Hydraulic jack The length of the support unit 810 protruding more than the crossbeam lower flange 311 is preferably set so that an area capable of sufficiently supporting the hydraulic jack 800 for joist removal can be secured. That is, of the hydraulic jack support unit 810 The degree of protrusion extending in the longitudinal direction of the bridge may be a degree capable of supporting the lower part of the hydraulic jack 800 for removing joists.

In addition, for example, referring to FIG. 9, the hydraulic jack 800 for joist removal and the hydraulic jack support unit 810 are disposed in one place in the middle based on the length extending in the transverse direction of the lower flange 311 of the crossbeam It may be installed, but is not limited thereto, and may be variously set in consideration of construction conditions and design conditions such as bridge size, bridge width, floor plate (slab) thickness, and spacing between girders. However, as described above, the hydraulic jack 800 for removing the joist is to the extent that the joist member 700 can be pulled out between the river robo 300 and the lower formwork plate 600, and the joist member 700 and the lower formwork plate 600 ), it is desirable to set the number of installations or the capacity of hydraulic jacks in consideration of these points, since a large stroke amount is not required for reducing the frictional force between them and is installed only temporarily and then removed.

Also, referring to FIG. 10 , the hydraulic jack support unit 810 may include an L-shaped member 811 and a vertical reinforcing member 812 . The L-shaped member 811 may be disposed to face one longitudinal side surface of the cross beam web 313 (9 o'clock direction in FIG. 10) and the upper surface of one longitudinal side of the cross beam lower flange 311. In addition, the bottom member 811a may be extended so as to protrude further to one side in the longitudinal direction than the upper surface of one side in the longitudinal direction of the lower flange 311 of the crossbeam so that the L-shaped member 811 can support the hydraulic jack 800 for removing joists. . As described above, the extent to which the floor member 811a extends may be such that it can support the lower part of the hydraulic jack 800 for removing joists.

In addition, for example, in response to the part where the hydraulic jack 800 for removing joists is disposed on the floor member 811a, it engages with the lower surface of the hydraulic jack to set the hydraulic jack in place (positioning, prevention of departure during operation of the hydraulic jack, etc.) Grooves or protrusions may be formed, but are not limited thereto.

Referring to FIG. 10, a vertical reinforcing member 812 may be additionally installed with respect to the L-shaped member 811 to reinforce the crossbeam web 313 in response to the operating force when the hydraulic jack 800 for joist removal operates. For example, referring to FIGS. 10 and 11, the vertical reinforcing member 812 is arranged to face one side in the longitudinal direction of the crossbeam web 313 of the L-shaped member 811 (side at 9 o'clock in FIG. 10) It can be installed orthogonally to the member. That is, the vertical reinforcing member 812 is provided so that the crossbeam web 313, which is slender compared to the flange, can be reinforced against the bending moment acting on the crossbeam web 313 as a reaction during the operation of the hydraulic jack 800 for joist removal. can

In addition, the hydraulic jack support unit 810 may be detachably fixed to one longitudinal side portion of the crossbeam web 313 and the crossbeam lower flange 311, respectively. For example, referring to FIG. 10, the hydraulic jack support unit 810 is provided with a fastening member including a bolt fastening member using bolts and nuts, and the longitudinal of the cross beam web 313 and the cross beam lower flange 311. It may be detachably fixed to each of the portions on one side of the direction, but is not limited thereto.

In addition, referring to FIG. 11, the hydraulic jack support unit 810 is bent downward from the L-shaped member so as to surround one side (9 o'clock direction in FIG. 11) in the longitudinal direction of the lower flange 311 of the crossbeam in a C shape. It may include a holding member 813 to be. For example, the gripping member 813 is provided in a shape concavely recessed to one side in the longitudinal direction so as to surround a portion of one side in the longitudinal direction of the lower flange 311 of the cross beam, and the concave shape is one side in the longitudinal direction of the lower flange 311 of the cross beam. It may be formed in a shape corresponding to the part. The holding member 813 may include a first member extending downwardly from the L-shaped member 811 and a second member extending from the lower end of the first member to the other side in the longitudinal direction.

In addition, for example, referring to FIG. 11, the hydraulic jack support unit 810 has a lower vertical reinforcing member 814 with respect to the lower surface of the bottom member 811a protruding to one side in the longitudinal direction of the L-shaped member 811. can include For example, the lower vertical reinforcing member 814 may be provided on one side in the longitudinal direction of the gripping member 813, that is, between the lower side of the L-shaped member 811 and one longitudinal side of the gripping member 813, It may be provided to prevent (reinforce) a phenomenon in which the bottom member 811a of the hydraulic jack support unit 810 is bent downward due to a reaction during operation of the hydraulic jack 800 for joist removal.

11, in the hydraulic jack support unit 810, the L-shaped member 811 is detachably fixed to the crossbeam web 813, and the gripping member 813 surrounds the lower flange 311 of the crossbeam. It can be detachably gripped and fixed. According to this, when the gripping member 813 wraps around the crossbeam lower flange 311, and then detachably fixes the L-shaped member 811 to the crossbeam web 813, such as bolt fixation, the hydraulic jack support unit ( 810) can be easily completed, and high workability can be secured.

As described above, the hydraulic jack 800 for removing joists and the hydraulic jack support unit 810 can be recovered after removing the lower formwork plate 600 and the joist member 700. For example, after the lower formwork plate 600 and the joist member 700 are formed after the curing of the bottom plate 500 is completed, the hydraulic jack support unit 810 installed on the lower flange 311 of the crossbeam has a hydraulic jack 800 for removing joists. ) is placed so that the joist member 700 can be removed (taken out) from between the steel crossbeam and the formwork (lower formwork plate) through the hydraulic jack 800 for joist removal, and the lower reject plate 600 is lowered to the lower part of the crossbeam. The plurality of joist members 700 may be removed by spaced upward from the planer 311 to create space or to reduce friction. In addition, since an empty space equal to the height of the joist member 700 is secured between the river robo and the formwork after the joist member 700 is removed, the lower formwork plate 600 can also be removed. After the floor plate construction is completed, after the lower formwork plate 600 and the joist member 700 are removed, the hydraulic jack 800 for removing the joist and the hydraulic jack support unit 810 can be recovered without remaining permanently.

On the other hand, in this bridge superstructure 1000, the river robo 300 can be permanently maintained. Accordingly, in the present bridge superstructure 1000, unlike the conventional method in which the crossbeam temporarily installed for deck construction must be removed after deck construction, the crossbeam 300 can be permanently maintained and the crossbeam removed ( disassembly) is omitted, so work efficiency can be higher than before. At the same time, according to the bridge superstructure 1000, the river robo 300 not only plays a role of supporting the deck formwork during the construction of the upper bridge, but also serves as a horizontal reinforcing member of the bridge superstructure during the bridge common. Therefore, the work of installing additional crossbeams 300 can also be omitted, and the structure of the upper part of the bridge can have higher structural safety.

Also, referring to the entire drawing, since the bridge robo 300 of the bridge superstructure 1000 is installed on the upper side to the extent of securing only the distance at which the joist member 700 is disposed between the deck formwork and the river robo 300, , even if it is permanently maintained, it can be placed fairly close to the side of the upper deck of the bridge, providing a more improved aesthetic.

In addition, in contrast to the existing deck formwork support method by installing a shoring for the construction of a floor plate (slab), in this bridge upper structure 1000, the steel crossbeam 300 is a joist member 700 and a lower formwork plate ( 600) and prevents the overturning of girders, so the installation of shores, which are complex structures extending from the ground, can be omitted, so that higher workability and workability can be secured. In particular, in the case of bridges constructed in downtown areas, Due to the installation, the inconvenience of controlling the roads on the upper and lower sides of the bridge can also be resolved. In addition, even in the construction of water bridges, there are limitations (restrictions) on installation in the case of a shoring structure, but according to the present bridge superstructure 100, these installation limitations can also be resolved or overcome in significant parts.

Meanwhile, hereinafter, a method for constructing an upper part of a bridge using an upper structure of a bridge according to an embodiment of the present application (hereinafter, referred to as 'this upper construction method for a bridge') will be described. However, this bridge upper construction method shares the same or corresponding technical features as the bridge upper structure 1000 described above, and the same reference numerals are used for the same or similar configurations as the bridge upper structure 1000 described above. and redundant descriptions are simplified or omitted.

12 is a flowchart illustrating a method of constructing an upper bridge using a bridge upper structure according to an embodiment of the present disclosure.

Referring to FIG. 12, the bridge upper construction method may include a step of arranging the first girder 100 and the second girder 200 on the bridge lower structure corresponding to the girder spacing (step S110). there is. For example, a bridge substructure may include abutments, piers, and the like.

In addition, referring to FIGS. 7A and 12, the bridge upper construction method fastens the first fastening unit 322a to the first fastening hole formed in the first slot hole 321a and the first opposing member 112, , Installing the river robot 300 by fastening the second fastening unit 322b to the second fastening hole 212a formed in the second slot hole 321b and the second opposing member 212 (Step S120) ) may be included. In step S120, the first and second girder 100 and the second girder 200 exceed the predicted transverse displacement generated during construction for each of the first girder 100 and the second girder 200. When excessive displacement away from each other occurs, excess displacement occurs in at least one of between the first inclined spacer member 320a and the first opposing member 112 and between the second inclined spacer member 320b and the second opposing member 212. It may include a process of interposing a spacer plate 400 having a thickness capable of covering the .

In addition, referring to FIG. 12, in this bridge construction method, a plurality of joist members 700 are arranged on the river robo 300 (see FIG. 7B), and a floor plate ( 500) may include a step (step S130) of arranging (see FIG. 7c) the lower formwork plate 600 for construction. The river crossrobe 300 and the joist member 700 can be used (used) as a support for supporting the lower formwork plate 600, and accordingly, the construction method on the upper part of the bridge does not require the use of shores, so the installation and Since the removal step is not included, the working time can be shortened.

In addition, referring to FIG. 12, in this method of constructing the upper part of the bridge, after the construction of the floor plate 500 is completed, the plurality of joist members 700 and the lower formwork plate 600 are removed using the hydraulic jack 800 for removing the joist, , Ganga Robo 300 may include a step of remaining (step S140). Step S140 may include installing the hydraulic jack support unit 810 on the lower flange 311 of the crossbeam and arranging the hydraulic jack 800 for removing the joist with respect to the hydraulic jack support unit 810.

In addition, for example, in step S140, the plurality of joist members 700 and the lower formwork plate 600 are removed using the hydraulic jack 800 for joist removal, and the hydraulic jack 800 for joist removal and the hydraulic jack support unit ( 810) from the Ganga Robo 300 may be included.

For reference, referring to FIG. 7D , the construction method of the upper part of the bridge may include a step of constructing the floor plate 500 between steps S130 and S140. For example, the construction of the floor plate 500 may include a process of placing reinforcing bars on the inside of the floor plate formwork, pouring concrete, and then sufficiently curing, which is obvious to those skilled in the art, so a more detailed description will be omitted.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

1: Conventional Ganga Robo
1000: bridge superstructure
100: first girder
101: first lower flange
102: first upper flange
103: first web
110: first vertical stiffener
111: first vertical member
112: first opposing member
200: second girder
201: second lower flange
202: second upper flange
203: second web
210: second vertical stiffener
211: second vertical member
212: second opposing member
300: Ganga Robo
310: horizontal member
311: crossbeam lower flange
312: crossbeam upper flange
313: crossbeam web
320a: first inclined spacer member
320b: second inclined spacer member
321a: first slot hole
321b: second slot hole
322a: first fastening unit
322b: second fastening unit
400: spacer plate
500: bottom plate
600: lower formwork plate
700: absence of joists
800: hydraulic jack for joist removal
810: hydraulic jack support unit
811: L-shaped member
811a: bottom member
812: vertical reinforcing member
813: holding member
814: lower vertical reinforcing member

Claims (9)

In the bridge superstructure,
A first steel girder of type I including a first lower flange, a first upper flange and a first web;
A second girder having an I shape including a second lower flange, a second upper flange, and a second web, and disposed at a girder interval on the other side in the transverse direction with respect to the first girder; and
Including a steel crossbeam provided to connect the first vertical stiffener provided on the other side in the transverse direction of the first web and the second vertical stiffener provided on one side in the transverse direction of the second web,
Looking over the river,
A first inclined spacer member having an I-type shape including a crossbeam lower flange, a crossbeam upper flange, and a crossbeam web, extending in the transverse direction, and extending obliquely upward toward one side in the transverse direction and connected to one side of the transverse member in the transverse direction including,
The crossbeam web has a thinner thickness than the crossbeam lower flange and the crossbeam upper flange,
The first vertical reinforcing member includes a first vertical member extending upward along one side of the first web in the transverse direction from the first lower flange, and a first facing member connected to the first inclined spacer member to face each other do,
The first inclined spacer member is formed with a first slot hole in the form of a long hole extending along a horizontal slope, and the first inclined spacer member is connected to the first through a first fastening unit installed in the first slot hole. fixed to the opposing member,
The river crossing includes a second inclined spacer member extending obliquely upward toward the other side in the transverse direction and connected to the other side in the transverse direction of the transverse member,
The second vertical reinforcing member includes a second vertical member extending upward from the second lower flange along the other transverse side of the second web, and a second facing member connected to the second inclined spacer member to face each other do,
The second inclined spacer member has a second slot hole in the form of an elongated hole extending along a horizontal inclination, and the second inclined spacer member is connected to the second slanted spacer member through a second fastening unit installed in the second slot hole. It is fixed to the opposing member,
The first vertical stiffener and the second vertical stiffener are provided so that the cross-robe is disposed at a position where the upper surface of the cross-robe forms a height-direction gap between the lower surface of the floor plate formed on the upper structure of the bridge,
The spacing in the height direction is such that a lower formwork plate corresponding to the lower surface of the floor plate and a plurality of joist members extending in the longitudinal direction to support the lower formwork plate can be arranged at intervals along the transverse direction in the girder spacing area. is set,
The bridge superstructure includes a hydraulic jack for removing joists and a hydraulic jack for removing joists to separate the lower formwork plate from the lower flange of the crossbeam so that the lower formwork plate and the joist member can be removed after the construction of the floor plate is completed. Further comprising a hydraulic jack support unit installed on the lower flange of the crossbeam to protrude in the longitudinal direction of the bridge from the lower flange of the crossbeam to support the,
The hydraulic jack support unit,
Disposed to face one longitudinal side surface of the crossbeam web and the upper surface of one longitudinal side of the lower flange of the crossbeam so as to protrude further to one longitudinal side than the upper surface of one longitudinal side of the lower flange of the crossbeam to support the hydraulic jack for removing the joist. L-shaped member from which the bottom member extends; and
Including a vertical reinforcing member additionally installed with respect to the L-shaped member to reinforce the crossbeam web in response to the operating force during the operation of the hydraulic jack for removing joists,
The hydraulic jack support unit is detachably fixed to each of the longitudinal side portions of the crossbeam web and the crossbeam lower flange,
The hydraulic jack for removing the joist and the hydraulic jack support unit are recovered after removing the lower formwork plate and the joist member,
The bridge superstructure that the river crossing is permanently maintained delete According to claim 1,
The slot extension length of the first slot hole and the slot extension length of the second slot hole are determined by the first fastening unit in consideration of the predicted lateral displacement generated during construction for each of the first and second steel girders. The bridge superstructure, which is installable to the first slot hole, and wherein the second fastening unit is set to be installable to the second slot hole. According to claim 3,
When the first steel girder and the second steel girder exceed the predicted lateral displacement and cause excessive displacement to move away from each other,
A spacer plate having a thickness capable of covering the excess displacement is interposed between at least one of the first inclined spacer member and the first opposing member and between the second inclined spacer member and the second opposing member. superstructure. delete delete delete According to claim 1,
The hydraulic jack support unit further includes a gripping member bent downward from the L-shaped member and extending to surround one longitudinal side portion of the lower flange of the crossbeam in a C shape,
In the hydraulic jack support unit, the L-shaped member is detachably fixed to the crossbeam web, and the gripping member is detachably gripped and fixed in a form surrounding the crossbeam lower flange. A bridge upper construction method using the bridge upper structure according to claim 3,
(a) arranging the first steel girder and the second steel girder on the bridge substructure corresponding to the girder spacing;
(b) fastening the first fastening unit to the first fastening hole formed in the first slot hole and the first opposing member, and fastening the second fastening unit to the second slot hole and the first fastening hole formed on the second opposing member; Installing the Ganga Robo by fastening to a second fastening hole;
(c) arranging a plurality of joist members on the river robo, and arranging a lower formwork plate for constructing a floor plate on the plurality of joist members arranged; and
(d) removing a plurality of joist members and the lower formwork plate using a hydraulic jack for removing joists after completion of the construction of the floor plate, and leaving the river crossing.

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