KR200294568Y1 - composite bridge using a bottom plate between piers and/or abuts - Google Patents

Abstract

The present invention relates to a composite bridge using a lower plate, the lower plate and the vertical hypothesis on the lower plate and the lower plate that serves as a support plate for installing the bridge girder between the bridge and the bridge or between the bridge and the upper surface of the bridge After forming the beam, the bridge girder is directly formed on the site and the bridge slab is formed on the bridge girder, so that it is unnecessary to mount the bridge girder, which is generated by installing in a conventional factory and using the bridge girder. A composite bridge using a lower plate incorporating the structural advantages that occur by boxing the shape, comprising: a lower plate formed between the upper surface of the bridge substructure, such as a bridge or alternator; A bridge girder formed perpendicular to an upper surface of the lower plate; And a bridge slab formed on an upper portion of the bridge girder.

Description

Composite bridge using a bottom plate between piers and / or abuts}

The present invention relates to a composite bridge using a lower plate. More specifically, after forming a vertical beam on the lower plate and the lower plate serving as a supporting plate for installing the bridge girder between the bridge and the bridge or between the bridge and the upper surface of the bridge, the bridge girders By directly forming in the field and forming the bridge slab on the bridge girder, it is not necessary to mount the bridge girder generated by installing in the field as a conventional factory product, and use the bridge girder but combine the structural advantages generated by PSC boxing It relates to a composite bridge using the lower plate.

Conventional simple bridge or continuous bridge installation method is a cable-stayed bridge, suspension bridge, truss bridge, PC girder bridge, preprex girder bridge with internal and external conditions such as bridge use, bridge length, limit of the upper part of bridge structure and bridge installation location. Various methods of bridge construction and construction have been developed. Among the bridge construction methods, in particular, the bridge construction method related to the present invention is installed in the longitudinal direction (direction in which the bridge is installed) on the bridge girder (including the box girder) (2, box girder), as shown in Figure 1, As a bridge construction method for installing bridge slabs, specifically, a bridge girder is manufactured in the form of a composite beam (in the form of a PSC beam, a preflex beam, etc.) at a factory, brought into the field, and the bridge girder is loaded with a lifting device such as a crane. After mounting the bridge between the bridge and the bridge, between the bridge and the bridge, the bridge slab (3) is formed on the bridge girders, hereinafter referred to as a method using a bridge girder.

In the case of the method using the bridge girder, by commercializing the bridge girder, there is no need for a separate bridge girder manufacturing process in the field, the air can be relatively shortened, and quality control can be facilitated. However, this method requires that there are sufficient sites such as operation, storage and bridge girder yard to mount the bridge girder on the bridge substructure according to the site conditions, and to install the bridge girder which has a large weight. Lifting equipment such as a crane is necessarily required, there is a problem that the construction cost increases by using expensive construction equipment and skilled workers are required,

In particular, when the bridge girder is manufactured in a box shape (box girder), it has the advantage of being able to manufacture a structurally superior bridge girder because of its excellent strength and torsional rigidity, but the material of the box girder is usually manufactured by processing a steel plate. The problem is that the cost is very expensive.

Therefore, it is possible to eliminate the costly bridge girder mounting process to install the beam-shaped bridge girders on the bridge undercarriage without a separate lifting device, and the bridge girders can be removed without using additional temporary facilities (such as temporary construction bridges). Since it is possible to manufacture directly in the field, it is possible to reduce the work site and facility cost, and it is urgently needed to develop a new bridge construction method that can produce bridge girder with structurally superior function.

The present invention is to solve the above problems,

An object of the present invention is to provide a bridge construction method that can easily manufacture and install the bridge girder without the installation of additional facilities for the bridge girders and bridge girder field production.

Another object of the present invention is to provide a bridge construction method that can construct structurally safe bridges even in simple bridges and continuous bridges by completing the upper slab by synthesizing the bridge girder with the lower flange of steel and the abdomen (WEB) of PSC concrete. .

1 is a perspective view of a bridge girder and bridge slab formed on a bridge that is a conventional bridge substructure.

Figures 2a and 2b is a coupling state diagram and an installation example of the lower plate of the present invention.

2B, 2C, 2D, and 2E are installation examples in the order of the method for constructing a composite bridge using a lower plate.

<Description of Major Codes in Drawings>

100: lower plate 110: shear connector

120: vertical construction beam 140: support

200: bridge girder 300: transverse beam

400: bridge slab 500: bridge substructure (pier, shift)

The present design does not use bridge girders at work sites around the site or use factory-made products, but installs them directly on bridges or bridges, which are substructures of bridges. In consideration of the possibility of an accident, the lower plate is continuously installed over the upper surface of the bridge and the bridge, and then the bridge girder is directly installed thereon, and the bridge girder is installed in the longitudinal direction in parallel with a predetermined interval. Direction) and then complete the upper concrete slab between the bridge girders so that the overall cross-sectional shape becomes a box shape, the structural characteristics are very excellent and economical bridge girder can be manufactured.

Best Mode for Carrying Out the Invention The best embodiment of the present invention will be described with reference to FIG.

The composite bridge using the lower plate of the present invention is a lower plate 100 formed between the upper surface of the bridge substructure 500, such as a bridge or alternating; A bridge girder 200 formed perpendicular to the upper surface of the lower plate; It includes; and the bridge slab 400 formed on the top of the bridge girder.

2A illustrates the overall shape of the lower plate 100. That is, the rectangular plate as a top connecting member 111 for connection with the bridge girder 200, which will be described later, longitudinal ribs 112 for cross-sectional reinforcement, transverse ribs 113 for preventing the cross-twisting, A plurality of temporary beam connecting holes 114 and end connecting holes 115 are formed.

Shear connector 111 is formed in the longitudinal direction of the lower plate in a predetermined distance from both sides to be embedded in the bridge girder concrete, and serves to fix the bridge girder to the lower plate.

In addition, the longitudinal ribs 112 are formed in the longitudinal direction of the lower plate at regular intervals between the shear girder 111 for bridge girders to serve as a cross-sectional reinforcement that can resist sagging or buckling of the lower plate.

The transverse ribs 113 are formed at regular intervals at right angles to the longitudinal ribs 112 in the transverse direction of the lower plate to serve to prevent twist of the lower plate, and the bridge girders 200 and the transverse ribs ( The forming shape of the 130 is combined with the lower plate on which the longitudinal ribs are formed, resulting in a box shape of a rectangular cross section.

That is, as shown in FIG. 2e, the lower plate 100 and the longitudinal ribs 112 formed with the lateral ribs 113 serve as lower flanges of the PSC box girder, and the bridge girders 200 serve as both abdomens (WEB). , The upper flange has the advantage that the bridge slab 200 and the laterally beam 300 to be described later has a very structurally excellent function.

In addition, the lower plate 100, as shown in Figure 2b is a plurality of lower plates are connected (in Figure 2b is shown only two lower plates are connected by bolts, etc. between the two piers), bridges or shifts of bridge substructure 500 is continuously installed across the upper surface, thereby acting as a work support plate that can form the bridge girder 200 directly on the pier / shift between the shift / pier.

Therefore, when the distance (intersection) between bridges / shifts is long, it is easy to manufacture bridge girders, and it is necessary to manufacture by connecting a plurality of lower plates having a required width D having the best structural calculation value. This connection is made by the mechanical friction joint which forms the joint plate 130 at the lower end of both lower plates, and is fastened by the high tension bolt through the end connecting hole 115, and the width, thickness and length of the lower plate are The enemy's choice is determined by the bridge length, bridge length, bridge type, etc.

As a result, the bridge girder production site, such as bridge / shift, can only be sued, and the lower plate can be installed to overcome the external environmental conditions that must be constrained by space. In addition, it simply serves as a work support plate and functions as part of the lower flange of the PSC box girder to support traffic loads transmitted from the bridge slab and the bridge girder from below.

If the pier / shift is longer, bridge girder 200 is installed, the lack of bending rigidity and deformation of the lower plate may occur, so as to support this shear connector for the bridge girder of the lower plate 100 as shown in Figure 2c Outside the 111, a vertical temporary beam 120 is formed in the direction in which the bridge girder is installed.

The vertical temporary beam 120 shares the stress generated in the lower plate and serves to prevent deformation of the lower plate, which may occur when the bridge girder is installed and the lower plate is mounted on the bridge / shift, and a work support for the worker. It also serves as a truss type using a "steel" or "needle" shaped steel, but a hypothetical beam connecting hole 114 formed in the lower plate using a connector such as a bolt to be detachable to the lower plate It is preferable to fasten it. It is preferable that the height of the bridge girder or more and to support the vertical temporary beam 120 in the transverse direction by installing the support 140 at a predetermined interval in the longitudinal direction.

The size of the vertical beam can be installed by selecting the enemy based on the size of the lower plate, the height of the bridge girder, can be simplified when attaching the assembly to the external formwork 150 of the bridge girder 200, It is supported in the transverse direction by the support 140.

Bridge girder 200 is formed as shown in Figure 2d by pouring concrete directly at the site while having a vertical vertical height so that the shear connection member 111 formed on the upper surface of the lower plate is embedded in the lower surface. In other words, by using the formwork to adjust the shape and size to reinforce the reinforcement, and to cast and cure the concrete, a number of ducts (210) are formed in the abdomen in advance, using the tension material and anchorage as needed After curing, the tension member can be settled at both ends to prestress the bridge girders. The tension member may be provided with anchorages at the upper ends of both ends of the bridge girder, and both ends of the tensioner may be installed at the anchorages to form the tension member in a substantially parabolic shape, and then fix the anchorages with the tensioner. Such tension member is generally formed to form a duct inside the bridge girder, but can be installed using a spacer outside the bridge girder.

By installing the tension member, it is possible to manufacture a bridge girder having a longer span while having a longer span, and the tension member is installed and fixed by the same method as that of a conventional PSC girder.

Two such bridge girders 200 are shown in FIG. 2D.

When the lower plate 100, the bridge girder 200, and the bridge slab 400 formed with the lateral beams are installed, the overall shape of the bridge girder is boxed so that the vertical temporary beam 120 does not have to be continuously present on the lower plate. Remove it to make it reusable. Since the vertical temporary beam is fastened with a bolt or the like, it is detachable. As a result, the bridge slab formed with the lower plate, the bridge girder and the lateral beams serves as the box girder as part of the bridge upper structure.

Branches such as piers / shifts generate significant parental moments in the case of continuous bridges. To increase the stiffness of the bridge girders in order to bear the stress of the parent, the cross section size should be increased, or a tension member should be used. This method is to fill the inside of the boxed bridge girders with concrete or the top of the point bridge girders. By providing a tension member in the formed transverse beam or bridge slab, the rigidity of the whole bridge is increased by increasing the supporting capacity of the point moment.

The bridge slab 400 is formed on the upper surface of the bridge girder 200 and the cross beam 300 formed in the right direction of the bridge girder, as shown in FIG. 2e, and uses a formwork separately from the bridge girder and the cross beam. Although it may be cast, it may be cast together with them, and a separate tension member may be installed in the transverse beam or bridge slab of the branch portion to increase the branch parent support as described above.

As a result, the lower plate of the present invention serves as a supporting plate of the temporary copper bar for installing the bridge slab formwork, it can be seen that the lower plate in the present invention serves as a multipurpose lower support plate.

In the method of constructing bridges using bridge girders, the present invention allows the box girders to be easily manufactured in the field by using the bridge girders and transverse beams of concrete members, and the lower plate between the tops of the bridges / shifts in between. By adopting the installation method over the bridge, it is possible to manufacture the undercarriage of the bridge which is structurally excellent in rigidity, to eliminate the unnecessary work process normally required to mount the bridge girder, and to minimize the production of temporary facilities for forming the bridge slab. It is possible to prevent safety accidents caused by height work by installing the lower plate, and by installing the bridge girder directly on the lower plate, it is possible to reduce the construction cost by the use of the site and working machine for the production. It can also be used in a continuous bridge.

Claims (7)

A lower plate formed over the upper surface of the bridge substructure, such as a bridge or alternator; A bridge girder formed perpendicular to an upper surface of the lower plate; And A bridge slab including a lateral beam formed on an upper portion of the bridge girder; Synthetic bridge using a lower plate, characterized in that it comprises a. The composite bridge of claim 1, further comprising a vertical temporary beam in a direction in which the bridge girder is formed, with a bridge girder interposed on an upper surface of the lower plate. The composite bridge using the lower plate of claim 1 or 2, wherein the lower plate upper surface further comprises a shear connector for connecting the longitudinal and transverse ribs and the bridge girder in the direction of forming the bridge girder. The method of claim 1 or claim 2, wherein the bridge is formed in the bridge slab or the lateral beam to fill the concrete inside the box-shaped bridge girder or the tension material formed on the top of the bridge girder at the point of the bridge portion of the bridge, such as the bridge or alternating Synthetic bridge using a lower plate, characterized in that. The method of claim 1 or claim 2, wherein the tension member is further installed via both ends and the central portion of the bridge girder, the prestress is introduced to the bridge girder by being fixed after tension on both ends of the bridge girder. Synthetic bridge using bottom plate. [4] The lower plate of claim 3, wherein the upper plate having a cross-sectional shape is formed by a lower plate, a bridge girder, and a bridge slab having transverse ribs and longitudinal ribs formed between the lower portions of the upper surfaces of the lower plates. Synthetic bridge using The method according to claim 1 or 2, characterized in that the bridge girders form the bridge girders to the vertical temporary beam in the direction in which the bridge girders are formed with the bridge girders interposed on the upper surface of the lower plate, characterized in that for installing the support for supporting the formwork Synthetic bridge using bottom plate.