KR101230049B1 - Incremental launching apparatus for launching concrete slab for bridge using form and rail, and constructing method for the same - Google Patents

Abstract

PURPOSE: An extrusion device for upper slab extrusion construction for a bridge using a mold and a rail and a construction method of the same are provided to rapidly and easily extrude an upper slab along a steel pipe rail or a cut railroad. CONSTITUTION: An extrusion device for upper slab extrusion construction for a bridge using a mold and a rail comprises an extrusion jack(410), a form flange(430), a steel form(510), a pocket form(520), a steel pipe rail(580), and a shear stud. The extrusion jack is disposed on a shear pocketed extrusion slab form and consecutively extrudes an upper slab segment including a shear pocket portion(120) on an upper flange(210) of a steel box girder. The form flange is arranged along a direction of extrusion to guide the extrusion of the upper slab segment and arranges a steel mold and a pocket mold. The steel mold is disposed on an extrusion slab form and forms a tunnel at a lower part of the upper slab and an outer shape of the upper slab. The pocket mold is provisionally connected to a top of the steel mold to form the shear pocket portion on the upper slab segment. The steel pipe rail is arranged along an upper flange of a girder to control a transverse direction the upper slab segment. The shear stud is welded to an opening portion of the shear pocket on the upper flange after the extrusion of the upper slab segment is completed. The shear stud serves as a shear connector when the upper slab segment and the upper flange are synthesized. [Reference numerals] (AA) Before form removal; (BB) After downward form removal; (CC) Extrusion work place; (DD) Abutment

Description

Incremental installation apparatus for construction of upper slab extrusion of bridge using formwork and rail and construction method thereof {Incremental launching apparatus for launching concrete slab for bridge using form and rail, and constructing method for the same}

The present invention relates to the extrusion hypothesis of the upper slab, and more particularly, to tunneling the lower surface of the upper slab when constructing a shearing pocket-type upper slab of a composite bridge. The present invention relates to an extrusion construction apparatus for extruded temporary slab of a bridge using formwork and a rail forming a shape) and a construction method thereof.

At present, the upper slab construction in Korea is mainly composed of installing a wooden bridge between a girder (steel box girder, plate girder, etc.), placing a temporary form on it, and placing reinforcing steel and pouring concrete. This type of on-site pouring method requires a long period of time, such as installation of concrete and dies, since the poured concrete is influenced by the climate and the labor cost is increased due to the need of a lot of manpower. The quality control is deteriorated.

Also, in the case of steel composite bridges, most of the construction of the upper slab is either temporary / permanent or mobile, or some precast slabs are used. Since the existing upper slab construction works on the steel box girder installed at the elevation angle, the worker frequently falls down to the lower part of the bridge, and high construction cost / construction period and quality deterioration problems are occurring.

In particular, in the case of temporary / left-in-place form, cracks are generated on the contact surface with the cast concrete, and the slab thickness becomes excessive due to the application of the design rule for the composite slab, And the increase of the dead load due to the number of workers, the cross-sectional bending stiffness is disadvantageous, and there is a problem in safety such as a fall caused by work in a high-altitude operation.

In addition, in the case of a movable shuttering system, dead weight due to its own weight and temporary equipment is increased, and additional reinforcement of a steel frame is required to prevent torsional deformation due to eccentric loads, and also under the bridge for concrete injection There is a problem in durability, such as a space access path is required, and a number of holes are generated in the slab by the formwork supporting member.

In addition, in the case of precast slab segments, the division size due to obstacles in transportation is limited, installation of the longitudinal tent is required due to a large number of construction connections, and construction cost is increased when a ground crane is used .

As an alternative to these problems, there is a method of manufacturing and extruding an upper slab at the back of the precast deck or in the middle of the bridge or the bridge. At this time, the precast deck can produce high-quality spheres through long-term curing, shape stability, precise dimensions, and industrialized molding processes. However, since the size of the transportable segments is small, Since the upper slab is integrated with the longitudinal steel wire, special care must be taken to prevent corrosion of the steel wire.

Particularly, in the upper slab extrusion method, an upper slab of a predetermined length is formed at the center of the alternating rear or span and continuously extruded on a girder of a bridge, and a shear connection material is installed to form a composite with the girder. Despite the many advantages of the extrusion method, the research is still in its early stages and needs to be improved.

1) Korean Registered Patent No. 10-432436 (Filing Date: July 28, 2000). Title of the Invention: "Quadrature Apparatus for Combining Extrusion for Launching a Bridge < RTI ID = 0.0 > 2) Korean Registered Patent No. 10-565360 (Filing Date: July 18, 2003). Title of the Invention: "Extrusion system for pushing upper girder in a bridge under a continuous extrusion method" 3) Korean Registered Patent No. 10-580819 (filed on July 20, 2005). Title of the Invention: "Continuous extrusion method of discontinuous bridges using joining" 4) Korean Published Patent No. 2005-110454 (published on November 23, 2005). Title of the invention: "Method of constructing bridge using box girder formwork system for IRM bridge" 5) Korean Registered Patent No. 10-734418 (Filing Date: October 27, 2006). Title of the Invention: "Continuous extrusion construction method of a bridge having an upper section and a wider section using an upper girder segment making a bridge using an extrusion wall" 6) Korean Registered Patent No. 10-869114 (Filing Date: April 11, 2007). Title of the invention: "Extrusion method of prismatic prestressed concrete bridges"

The technical problem to be solved by the present invention for solving the above problems, when constructing the shear pocket type upper slab of the composite bridge by the extrusion construction method, the upper slab that can be formed not only the shear pocket portion but also the shear studs in the general portion It is an object of the present invention to provide an extrusion hypothesis apparatus for forming an upper slab extrusion using a formwork and a rail that can quickly and easily extrude an upper slab along a steel pipe rail or a cut railway rail by construction.

Another technical problem to be achieved by the present invention is to form an extrusion hypothesis for the upper slab extrusion hypothesis and the construction of the bridge using the formwork and rail, which can improve the composite performance between the upper slab and the upper flange by forming a shear stud in the general portion It is to provide a method.

Another technical problem to be achieved by the present invention is to provide an extrusion hypothesis apparatus for the upper slab extrusion hypothesis of bridges using formwork and rail, and a construction method that can be easily applied not only to steel box girder bridge but also minority girder bridge. will be.

As a means for achieving the above technical problem, the extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the present invention, the hypothesis of shear-pocket type upper slab in a rigid composite bridge having a girder and the upper slab An extrusion hypothesis apparatus, comprising: a formwork disposed on an extrusion slab workbench and forming a tunnel under the upper slab segment; A pocket formwork fastened on the formwork to form a shear pocket portion on the upper slab segment; A fabrication flange arranged along an extrusion direction to guide extrusion of the upper slab segment, wherein the formwork and pocket formwork are disposed; A rail disposed along the upper flange of the girder to adjust the transverse direction of the upper slab segment; An extrusion jack disposed on the fabrication flange and continuously extruding an upper slab segment having a shear pocket opening on the upper flange; And a shear stud welded on the upper flange prior to extrusion of the upper slab, the shear stud serving as a shear connector when the upper slab segment and the upper flange are synthesized, wherein the upper slab is formed of a shear pocket opening. And it is characterized in that it is formed in the form of a tunnel consisting of a general portion that the front pocket opening is not formed.

Here, the rail may be a steel pipe-type longitudinal steel pipe rail or a cut railway rail.

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Extrusion hypothesis device for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the present invention may further include a pedestal for welding the cut railway rail to support the railway rail.

Here, the upper slab may further include a sliding pad installed on the upper portion of the steel pipe rail so that the upper slab is extruded while sliding.

Here, the formwork is characterized in that the steel formwork which is demolded downward after the upper slab is formed in the extrusion slab workbench.

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Here, when the upper slab reaches the final position, by filling the shear pocket portion with the non-shrink mortar synthesizes the upper slab and the upper flange, the leakage of the filler material during the secondary casting with the non-shrink mortar through the shear pocket portion It may further include a secondary pour filling material leakage preventing pads installed on both ends of the upper flange to prevent the leakage.

Here, the upper slab may be applied to the steel box girders or minority girders capable of extrusion hypothesis.

As another means for achieving the above-described technical problem, the construction method for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the present invention, for the upper slab extrusion hypothesis in a rigid composite bridge having a girder and the upper slab A construction method comprising the steps of: a) installing a girder on which an upper flange is formed on an alternating or pier; b) placing the tunnel forming formwork and the shear pocket forming form on the workbench flange in the extrusion workshop; c) arranging a rail along the upper flange of the girder to adjust the transverse direction of the upper slab segment; d) fabricating an upper slab segment having a tunnel shape formed on a lower surface thereof using the formwork and the pocket formwork and having a front pocket portion and a general portion; e) demoulding the pocket formwork and the formwork, separating the upper slab segment from a fabrication flange; f) placing an extrusion jack on top of the workbench flange; g) continuously extruding the upper slab segment along the rail using an extrusion jack; And h) synthesizing the upper slab with the upper flange on the shear pocket opening after the extrusion of the upper slab is completed.

According to the present invention, when the shear pocket type upper slab of a steel composite bridge is constructed by the extrusion construction method, by constructing the upper slab in which the shear stud can be formed not only in the shear pocket portion but also in the general portion, along the steel pipe rail or the cut railway rail. The upper slab can be extruded quickly and easily, thereby greatly shortening the construction period of the bridge.

According to the present invention, by forming a shear stud in the general portion, it is possible to improve the synthesis performance between the upper slab and the upper flange.

According to the present invention, it is possible to easily apply not only to a steel box girder bridge but also to a minor main girder bridge.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram illustrating a typical method of constructing an upper slab by extrusion.
Fig. 2 is a view showing a die installed behind the shift. Fig.
3 is a view showing an extrusion mechanism in an extrusion method in which an upper slab of a steel composite bridge is constructed.
4A and 4B are views illustrating upper slabs for steel composite bridges, respectively.
Fig. 5 is a perspective view of an extruding apparatus for constructing a shear pocket type upper slab of a steel composite bridge. Fig.
FIG. 6 is a view showing a shear pocket type upper slab placed on-site by the extrusion apparatus shown in FIG.
7 is a perspective view showing an extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention.
8 is a cross-sectional view of the shear pocket type upper slab formed by the extrusion hypothesis device shown in FIG.
9A to 9F are views for explaining in detail the construction method for the upper slab extrusion of the bridge using the formwork and the rail according to the embodiment of the present invention.
10 is a view illustrating a process of separating the upper slab in the extrusion installation apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention.
11A and 11B are diagrams illustrating an extrusion hypothesis apparatus for the upper slab extrusion hypothesis of a bridge using formwork and rail according to an embodiment of the present invention, respectively, applied to a box-type bridge and a minor-type bridge.
12 is a view showing the support of the steel bar using a shear stud in place of the U-shaped support in the extrusion installation apparatus for the upper slab extrusion of the bridge using the formwork and the rail according to the embodiment of the present invention.
13 is a view illustrating the use of a concrete girder instead of steel girder in the extrusion installation apparatus for the upper slab extrusion of the bridge using the formwork and the rail according to an embodiment of the present invention.
FIG. 14 is a view illustrating an example of using a railroad rail delivered in place of a steel pipe rail as an extrusion device for extruded upper slab of a bridge using formwork and rail according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a section is referred to as "comprising" an element, it does not exclude other elements unless specifically stated otherwise. Other elements, first of all, Referring to FIGS. 1 to 4, the shear pocket type upper slab will be described with reference to FIGS. 5 and 6. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram illustrating a typical method of constructing an upper slab by extrusion.

Referring to FIG. 1, in the conventional continuous extrusion method, an extrusion workshop 400, which is a segment fabrication site, is installed at a place such as a rear side of an alternating 310 or a pier 320, and a segment structure corresponding to a bridge superstructure. That is, after manufacturing the upper slab (100-1 ~ 100-n), the upper slab (100-1) on the steel box girder 200 in the direction that the bridge is to be installed by the extrusion jack as an extrusion device, that is, the axial direction It is a construction method of successively pushing ˜100-n) sequentially to form an integrated bridge as a whole.

More specifically, FIG. 1 (a) shows a first embodiment in which a steel box girder 200 is installed on an alternate 310 and a first upper slab 100-1 to be extruded in an extrusion work station 400 in the rear of the alternate 310 is manufactured 1B shows a state in which after the second upper slab 100-2 is manufactured, the second upper slab 100-2 is disposed behind the first upper slab 100-1, 1 (c) shows that the first to sixth upper slabs 100-1 to 100-6 are continuously extruded from above the steel box girder 200 . 1D shows that the first slabs 100-1 through 100-n are all pushed out from the upper part of the steel box girder 200 to form the upper slab. And after the upper slab 100 is extruded, it is combined with the upper flange of the steel box girder 200 to complete the extrusion. Here, A indicates the extrusion slab production stand, and will be described later with reference to Fig.

This continuous extrusion method does not require a tramp and the segment structure is sequentially placed in the production site to complete the bridge. Therefore, it is easy to manage the construction by making the segment structure at a certain place with high safety, The construction can be proceeded, which shortens the construction period drastically and facilitates the process management.

In addition, since the formwork is mechanized, it is possible to assemble and disassemble quickly, and all the processes are performed at a certain place, so that it is possible to perform a skilled work with a small number of personnel, thereby making it possible to streamline the work. In addition, it is especially economical when traversing deep valleys or rivers, where it is not easy to install the bridge because it does not require a bridge for supporting the bridge overhead structure from the ground. Therefore, there is an advantage that the air can be shortened.

2 is a view showing the formwork installed behind the shift, when the steel box girders 200 are first installed, the slab manufacturing bed (casting bed) is installed in the middle of the bridge or alternating 310. At this time, a formwork for placing a slab 100 of a predetermined size (typically about 25 m) is installed in the manufacturing table, and all segments use the same formwork.

As shown in Fig. 2, the formwork installed on the ground behind the shift is composed of reinforced wood except for two strips having the same width as the upper flange of the steel box girder, and the upper flange of the steel box girder. Aligned to the same location as Then, during the extrusion of the upper slab, the hardened concrete slab slides over the strip, where the strip is generally made of standard I type steel such as WF16 (CB163). One end of the strip is attached to the upper flange of the steel box girder, but is offset from the upper flange by the thickness of the sliding shoe. On the other hand, the formwork is fixed by an anchor. Then, in order to separate the formwork from the concrete, the ends of the strip and the steel box girder are lifted about 2.5 cm using a small auxiliary vertical jack installed at regular intervals below the strip.

On the other hand, the construction of the steel composite bridge having precast decks can be performed by various methods, and the stage-deck jacking method of extruding the slab can be constituted as follows.

Specifically, the upper slab segments 100-1 to 100-n are laid in a predetermined length (about 20 to 25 meters) at the center of the turn 310 or at the center of the span, The upper slab segments 100-1 to 100-n are separated from the casting bed in this process. The upper slab segments 100-1 to 100-n are separated from the casting bed. Next, a workbench for laying the upper slab segments 100-1 to 100-n is prepared. Accordingly, the entire upper slab 100 is completed by the continuous installation of the respective upper slab segments 100-1 through 100-n, and the upper slab 100 is provided with the shear connection members (Not shown) to the steel box girder 200.

The advantage of this method is that the same dies are repeatedly used for all the upper slab segments 100-1 to 100-n, and the concrete is laid at the same position, and each of the upper slab segments 100-1 to 100- Can be connected by reinforcing bars to integrate the entire slab.

3 is a view showing an extrusion mechanism in an extrusion method in which an upper slab of a steel composite bridge is constructed.

3, when the upper slab 100 is made up of three upper slab segments 100-1, 100-2, and 100-3, FIG. 3A shows the first upper slab segment 100-1, 3B shows that the second upper slab segment 100-2 is manufactured and extruded together with the first upper slab segment 100-1, and FIG. The third upper slab segment 100-3 is fabricated and extruded together with the first and second upper slab segments 100-1 and 100-2. For example, the first to third upper slab segments 100-1 to 100-3 can be made to have a longitudinal length of 2 m, and each segment is extruded one by one at the end of the steel box girder 200 .

Subsequently, the extruded reinforced upper slab segments 100-1, 100-2 and 100-3 are respectively combined with the upper flange 210 of the steel box girder 200 to complete the extrusion.

4A and 4B illustrate an upper slab of a composite composite bridges for press-fitting. FIG. 4A shows a shear pocket-type upper slab 100a extruded on an urging girder, FIG. 4B shows a pre- Shaped upper slab 100b which is a cast slab.

Specifically, the shear pocket type upper slab 100a extruded on the steel box girder is welded to the shear pockets after the slab is extruded and the prestress is introduced, as shown in Fig. 4A, Is filled.

The construction method of filling non-shrinkage mortar / concrete with small openings installed in the upper slab requires expensive construction cost and adequate protection curing. Since the fastening force between the upper slab and the steel box girder is concentrated in the opening, cracks are generated in the upper slab with time. Field welding of shear connectors in the openings is very expensive, and there is no upper flange portion of the steel box girder that is embedded in the concrete, resulting in a structurally disadvantageous problem such that the side points of the compression flange are concentrated in several portions.

In addition, the rail-type upper slab 100b, which is a precast slab transversely connected to the reinforcing bar only, is provided with a continuous launch opening, which is filled with non-shrinkage concrete after the extrusion is completed, Type upper slab. These initial rail-type upper slabs are slab-like in the upper flange of the steel box girder, and are in continuous slab-like form, supported by reinforcing bars only for transverse deflections.

This method can avoid the concentration of the clamping stress due to the continuously formed openings and improve the lateral stability of the compression flange of the steel box girder, but it is not possible to avoid the weakness inherent in design (the need for field welding of shear connectors and the flat upper flange surface ) Can not be resolved.

Meanwhile, FIG. 5 is a perspective view of an extruding apparatus for constructing a shear pocket-type upper slab of a steel composite bridge, and FIG. 6 is a view showing a shear pocket-type upper slab installed in place by the extrusion apparatus shown in FIG.

Referring to FIG. 5, the extrusion hypothesis apparatus for constructing the shear pocket type upper slab of the steel composite bridge is an extrusion hypothesis apparatus of the upper slab in the steel composite bridge having the steel box girder 200 and the upper slab 100. It includes an extrusion jack 410, extrusion slab fabrication stage 420 and fabrication flange (430), and includes a shear stud 220 is welded to the upper slab 210 in the field.

The extrusion jack 410 is disposed on the shear pocket type extrusion slab manufacture stand 420 and has an upper slab segment 100-1 with openings 120 formed on the upper flange 210 of the steel box girder 200, To 100-n) are successively extruded. That is, the extrusion jack 410, which is an extrusion apparatus, is provided with the upper slab segments 100-1 to 100-n, which are formed in the extrusion work station 400 in the alternate rear and are provided with continuous shear pocket openings 120, And continuously extruded from the upper part of the girder 200.

The fabrication flange 430 is disposed at the top of the extrusion jack 410 and is disposed along the extrusion direction to guide the extrusion of the upper slab segments 100-1 to 100-n.

The shear stud 220 is welded to the shear pocket openings 120 on the upper flange 210 after the upper slab segments 100-1 to 100-n have been extruded to form the upper slab segments 100-1 to 100- -n) and the upper flange 210, respectively.

When the upper slab segments 100-1 to 100-n reach the final position, the shear stud 220 is welded to the upper flange 210 of the pre-installed opening 120, The upper slab segments 100-1 to 100-n and the upper flange 210 are combined by filling the openings 120. [

6, the front slab 100 is divided into a front pocket 120 having a front pocket opening formed therein and a general pocket 130 having no front pocket opening, Shear stud 220 is welded onto upper flange 210 after extrusion of all upper slabs 100. Here, reference numeral 110 denotes a tension member which is a continuous reinforcing bar of the upper slab 100.

Such a shear pocket type upper slab is a type which is mainly applied to precast decks. The shear pocket type upper slab is formed in advance in a rectangular space at a position where the shear connector 220 is to be installed The upper slab 100 is joined to the steel box girder 200 by welding the shear joint 220 to the high strength non-shrinkable mortar after being mounted on the steel box girder 200.

However, in this shear pocket type upper slab 100, since the shear stud 220 is welded on the upper flange 210 after all of the upper slabs 100 are extruded, the shear stud 220 is not formed in the normal part 130 Structure.

Accordingly, the extrusion construction apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention and the construction method, the shear stud 220 not only in the front pocket portion 120 but also the general portion 130. It provides an upper slab 100 that can be formed. For convenience, the upper slab 100 constructed by the extrusion hypothesis apparatus and the construction method for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention is the same as the shear pocket type upper slab 100 described above We use the sign.

Hereinafter, with reference to Figures 7 to 11, an extrusion construction apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention will be described in detail. First, the extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention is described as being applied to the steel composite bridge, but can be applied to concrete bridges as well as steel composite bridge.

FIG. 7 is a perspective view illustrating an extrusion hypothesis apparatus for extruded upper slab of a bridge using formwork and rail according to an embodiment of the present invention, and FIG. 8 is a cross-sectional view of a shear pocket type upper slab by the extrusion hypothesis apparatus illustrated in FIG. 7. .

Referring to Figure 7, the extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention, shear in a rigid composite bridge having a steel box girder 200 and the upper slab 100 Extrusion hypothesis apparatus for forming pocket type upper slab, extrusion jack 410, extrusion slab manufacturing platform 420, fabrication flange (formwork flange) 430, steel formwork 510, pocket formwork 520 and steel pipe A rail 580 is included, and a shear stud 220 is welded to the upper slab 210. Extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention, it is possible to use a cut railway rail instead of the steel pipe rail 580, which will be described later, the steel pipe rail The case of using 580 will be described first.

Extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention by manufacturing the upper slab 100 in the extrusion workshop, the upper flange 100 produced along the extrusion direction of the upper flange ( 220 is an extrusion hypothesis. At this time, the upper flange 220 is formed in a tunnel-like shape at its lower portion as indicated by reference numeral B.

The extrusion jack 410 is disposed in a shear pocket type extrusion slab manufacture stand 420 and is provided with upper slab segments 100-1 to 100 -n) is continuously extruded. That is, the extrusion jack 410, which is an extrusion apparatus, is provided with the upper slab segments 100-1 to 100-n, which are formed in the extrusion work station 400, And continuously extruded from the upper part of the girder 200.

The production stand flange 430 is disposed above the extrusion jacks 410 and disposed along the extrusion direction to guide the extrusion of the upper slab 100, i.e., the upper slab segments 100-1 to 100-n, do. The fabrication flange 430 is arranged along the extrusion direction to guide the extrusion of the upper slab 100, and the steel formwork 510 and the pocket formwork 520 are disposed.

The shear stud 220 is welded in advance to the front pocket 120 and the general part 130 on the upper flange 210 prior to extrusion of the upper slab 100 to form the upper slab segment 100 and the upper flange 210, 210) serves as a shear connector in the synthesis.

The steel formwork 510 is disposed on an extrusion slab workbench, forms a tunnel and an outer shape of the upper slab 100 under the upper slab 100, and is demolded downward before extrusion of the upper slab 100. Specifically, the upper portion of Figure 8 shows the steel formwork 510 and the pocket formwork 520 is installed on the workbench flange 430, the lower part of Figure 8 is the steel formwork 510 to the workbench flange 430 After demolding downward on the extrusion jack, the extrusion jack 410 is installed in the extrusion jack fixing hole to extrude the upper slab 100 along the steel pipe rail 580 in an alternate direction. That is, the steel formwork 510 is demolded downward before extrusion after the upper slab 100 is formed in the extrusion slab workbench.

Pocket formwork 580 is temporarily fastened on top of the steel formwork 510 to form a shear pocket portion on the upper slab segment. That is, the pocket formwork 580 is temporarily fastened to the upper portion of the steel formwork 510 to form the front pocket portion 120 of the upper slab 100, and then separated from the steel formwork 510 first. do.

Steel pipe rail 580 is a steel pipe-type longitudinal rail, disposed along the upper flange of the girder to adjust the transverse direction of the upper slab segment. In this case, a cut railway rail may be used instead of the steel pipe rail 580, which will be described later.

Subsequently, when the upper slab segments 100-1 to 100-n reach the final position, the upper slab segments 100-1 to 100-n And the upper flange 210, respectively. That is, the upper slab 100 is combined with the steel box girder 200 by plugging into the high strength non-shrinking mortar.

Here, although described as being applied to the steel box girder 200 in the embodiment of the present invention, it is apparent to those skilled in the art that it can be applied to concrete girder instead of the steel box girder 200.

5, the shear stud 220 is welded to the upper flange 210 of the pre-installed shear pocket portion 120, while in the embodiment of the present invention, The upper slab 100 is divided into a front pocket 120 having a front pocket opening formed therein and a general pocket 130 having no front pocket opening and the upper slabs 100-1 to 100- Are pre-welded to the front pocket portion (120) and the general portion (130) on the upper flange (210) before extrusion.

Specifically, referring to FIG. 8, the shear pocket type upper slab 100 formed by the extrusion hypothesis device includes a segment manufacturing support beam 530, a buried pipe 540, a height adjusting nut 550, and a U-shaped support 560. , Sliding pad 570, steel pipe rail 580, uneven portion 590, transverse control block 610 and secondary pour filling material leakage prevention pad 620.

Segment fabrication support beam 530 is disposed along the upper flange to support the upper slab segment during the extrusion construction of the upper slab segment.

The buried pipe 540 has a pipe shape and is installed on the segment manufacturing support beam 530 to move the U-shaped support 560 up and down.

Height adjusting nut 550 is fastened to the buried pipe 540 to adjust the height of the U-shaped support 560.

U-shaped support 560 is disposed on the upper flange 210 at predetermined intervals to support the steel pipe rail 580. At this time, the U-shaped support 560 is removed from the segment manufacturing support beam after the steel pipe rail is removed. In addition, in the embodiment of the present invention is described as using the U-shaped support 560 to support the steel pipe rail 580, it is possible to support the steel pipe rail 580 using a shear stud 220 This will be described later.

The sliding pad 570 is installed on the upper portion of the steel pipe rail 580 so that the upper slab 100 slides while the upper slab 100 is extruded.

Steel pipe rail 580 is a steel pipe-type longitudinal rail, disposed along the upper flange 210 to adjust the transverse direction of the upper slab 100, the steel pipe rail 580 is the upper slab in the final position It is removed when it is reached.

In addition, the steel formwork 510 is formed with irregularities on both sides to increase the fastening force with the concrete, irregularities 590 are formed inside the tunnel of the upper slab 100 formed by the steel formwork 510. do.

The lateral adjustment block 610 may be formed at a portion in contact with the side surface of the upper flange 210 so that the transverse displacement of the upper slab 100 does not occur when the extrusion of the upper slab 100 is installed.

The secondary pour filling material leakage preventing pad 620 is installed at both ends of the upper flange 210 to prevent leakage of the filling material during secondary pouring with non-shrink mortar through the front pocket portion.

According to the extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention, when constructing the shear pocket type upper slab 100 of the steel composite bridge or concrete bridge by the extrusion construction method, the upper slab The 100 can be extruded quickly and easily. That is, when the shear pocket type upper slab of the steel composite bridge is extruded by the extrusion method, the upper slab can be rapidly and easily extruded, and the construction period of the bridge can be greatly shortened.

The main consideration in applying such shear pocket type top slabs is the spacing and size of shear pockets. That is, if the spacing of the shear pockets is too narrow and the number of shear pockets is increased, the cost for mortar injection and curing management is increased. If the distance is too long, the fastening force between the steel box girder and the upper slab is not dispersed. There is a possibility that cracks will be generated in the slab.

In addition, the size of the shear pocket affects the number of short-circuit points of the longitudinal temperature reinforcement of the upper slab, In this case, the spacing and size of the shear pockets will depend on the diameter of the shear connectors and the number of shear pockets, and the diameter, number and spacing of the studs according to "3.9.5 shear connectors" .

On the other hand, Figures 9a to 9f are views for explaining in detail the construction method for the upper slab extrusion of the bridge using the formwork and the rail according to an embodiment of the present invention.

Forming method for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention, first, as a construction method for the upper slab extrusion hypothesis in a steel composite bridge having a girder and the upper slab, the upper flange The formed girders are installed on shifts or piers.

Next, in the extrusion workshop, the steel formwork for tunnel formation and the pocket formwork for shearing pocket formation are disposed on the workbench flange. That is, the workbench flange is arranged along the extrusion direction to guide the extrusion of the upper slab segment, and the steel formwork and the pocket formwork are disposed.

Next, a steel pipe rail, which is a steel pipe-type longitudinal rail, is disposed along the upper flange of the girder to adjust the transverse direction of the upper slab segment.

Next, a tunnel shape is formed on the bottom surface of the steel formwork and the pocket formwork, and the upper slab segment having the front pocket portion and the general portion is manufactured. Specifically, as shown in Figure 9a, by using the steel formwork 510, the concrete is first cast to form an upper slab having a tunnel. At this time, the steel formwork 510 and the steel pipe rail 580 in the extrusion workshop.

Next, the pocket formwork and the steel formwork are demolded to separate the upper slab segment from the workbench flange. Here, the pocket formwork is temporarily fastened to the steel formwork to form a shear pocket portion and then separated from the steel formwork. Specifically, as shown in FIG. 9B, the steel formwork is demoulded downward. At this time, the steel pipe rail is supported in the extrusion workshop.

Next, an extrusion jack is disposed on the flange of the bench, and then the extrusion slab is continuously extruded along the steel pipe rail using the extrusion jack.

Next, after the extrusion of the upper slab is completed, the upper slab is synthesized with the upper flange on the shear pocket opening. For example, the upper slab and the upper flange are synthesized by filling the opening with non-contraction mortar, and the steel pipe rail is removed before filling the opening with the non-contraction mortar. Specifically, as shown in FIG. 9C, all of the preformed concrete segments are extruded, that is, the U-shaped support 560 is lowered to support both surfaces of the upper flange 210. Then, as shown in FIG. 9D, the steel pipe rail 580, which is a steel pipe longitudinal rail, is removed. Thereafter, as shown in FIG. 9E, the U-shaped support 560 is removed. Finally, as shown in FIG. 9F, the bottom slab concrete is cast in situ at the end of the concrete secondary and starting point.

On the other hand, Figure 10 is a view illustrating a process of separating the upper slab in the extrusion installation apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to an embodiment of the present invention.

Figure 10 shows the production of shear pocket type upper slab by applying an extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention, the state before the demoulding from the steel formwork 510 in the workshop After the demolding from the steel formwork 510, respectively.

Specifically, in the extrusion hypothesis device for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention, the steel slab 510 is disposed on the extrusion slab workbench to form the outer shape of the upper slab. . That is, the steel formwork 510 is disposed on the workbench flange 430 and the extrusion slab workbench to be demolded from the upper slab 100.

On the other hand, Figures 11a and 11b are diagrams illustrating that the extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention is applied to the box-shaped bridge and the minority-shaped bridge.

The upper slab 100 according to the embodiment of the present invention, as shown in Figure 11a, can be applied to the steel box girder 200a capable of extrusion hypothesis or as shown in Figure 11b, minority girders 200b. Can be. Here, the minor main girder bridge is a type of bridge that reduces the number of residential walls by increasing the durability of slabs by using precast concrete slabs (PC slabs) or prestressed slabs and by increasing the residential intervals. In order to simplify the cross section of the girder, such minor girders are to be constructed by omitting the horizontal stiffener and vertical stiffener attached to the girder abutment.

On the other hand, Figure 12 is a view showing the support of the steel bar using a shear stud in place of the U-shaped support in the extrusion installation apparatus for the upper slab extrusion of the bridge using the formwork and the rail according to the embodiment of the present invention.

Extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention, as shown in Figure 12a), using the U-shaped support 560 to the steel pipe rail 580 Although supported, it is also possible to install a steel pipe rail 580 on the shear stud 220, as shown in FIG. As such, when supporting the steel pipe rail 580 using the shear stud 220, the U-shaped support 560, the buried pipe 540 and the height adjustment nut 550 shown in Figure 12a) is used. The steel pipe rails 580 can be supported without having to.

On the other hand, Figure 13 is a view illustrating the use of concrete girder instead of steel girder in the extrusion installation apparatus for the upper slab extrusion construction of the bridge using the formwork and the rail according to the embodiment of the present invention.

In the extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention described above, it was described as using the steel fabrication flange (430) and the upper flange 210 of the steel, Figure As shown in 13, it indicates that the concrete girder 430b can be applied. That is, in the case of the extrusion hypothesis device for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention, as well as the concrete girder 430b as well as the flange 430 and the upper flange 210 of the steel production stand To extrude the upper slab (100).

On the other hand, Figure 14 is an extrusion hypothesis device for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention, it is a diagram illustrating the use of a cut railway rail instead of steel pipe rail.

In the extrusion hypothesis device for the upper slab extrusion hypothesis of the bridge using the formwork and the rail according to the embodiment of the present invention described above, as shown in Figure 14, by cutting the railway rail 710 instead of the steel pipe rail 580 described above Can be used, the railway rail 710 may be installed pedestal 720 for height adjustment. In this case, the railway rail 710 is welded to the pedestal 720, 730, the pedestal 720 can be used to correct the flange thickness change by using the pedestal (720a, 720b, 720c), respectively. .

As a result, according to the embodiment of the present invention, when constructing a shear-pocket type upper slab of a steel composite or concrete bridge by an extrusion construction method, the upper slab is formed by constructing an upper slab in which not only the shear pocket portion but also the shear stud can be formed in the general portion. Extrusion can be performed quickly and easily, and the construction period of the bridge can be greatly shortened.

According to an embodiment of the present invention, by forming the shear studs in the general portion, it is possible to improve the synthesis performance between the upper slab and the upper flange, and can be easily applied to not only steel box girder bridge but also minority girder bridge.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: Upper slab (Concrete Upper Slab)
100-1 to 100-n: Slab Segment
110: Continuous reinforcing bar / tension material (Tendon)
120: shearing pocket portion (opening portion)
130:
200: Steel Box Girder
210: Upper Flange
220: Shear Connector / Shear Stud (Stud)
310: Shift
320: Pier
400: extrusion workshop
410: Extrusion Jack
420: extrusion slab manufacturing stand
430: workbench flange
510: steel formwork
520: pocket formwork
530: segmented support beam
540: landfill pipe
550: height adjustment nut
560: U-shaped support
570: sliding pad
580: steel pipe rail (steel pipe longitudinal rail)
590: uneven portion
610: horizontal adjustment block
620: Secondary padding material leak prevention pad
710: cut railway rail
720, 720a, 720b, 720c: rail stand
730: weld

Claims (10)

An extruding apparatus for extruding a shear pocket type upper slab in a steel composite bridge having a girder and an upper slab,
A formwork disposed on the extrusion slab platform and forming a tunnel under the upper slab segment;
A pocket formwork fastened on the formwork to form a shear pocket portion on the upper slab segment;
A fabrication flange arranged along an extrusion direction to guide extrusion of the upper slab segment, wherein the formwork and pocket formwork are disposed;
A rail disposed along the upper flange of the girder to adjust the transverse direction of the upper slab segment;
An extrusion jack disposed above the fabrication flange and continuously extruding the upper slab segment having a shear pocket opening on the upper flange; And
A stud welded on the upper flange prior to extrusion of the upper slab and serving as a shear connector when the upper slab segment and the upper flange are combined,
Including but not limited to:
The upper slab extrusion hypothesis for the upper slab extrusion hypothesis of the bridge using the formwork and the rail, characterized in that formed in the form of a tunnel consisting of a shear pocket portion formed with a shear pocket opening and the general portion is not formed in the shear pocket opening. The method of claim 1,
The rail is an extrusion hypothesis apparatus for the upper slab extrusion hypothesis of the bridge using the formwork and the rail, characterized in that the longitudinal steel pipe rail or cut rail. delete The method of claim 2,
Extrusion apparatus for extruded hypothesis of the upper slab of the bridge using the formwork and the rail further comprising a pedestal and welded to the cut railway rail to support the railway rail. 5. The method of claim 4,
Extrusion hypothesis for the upper slab extrusion hypothesis of the bridge using the formwork and the rail further comprises a sliding pad which is installed on the upper portion of the steel pipe rail so that the upper slab slides while extruding the upper slab. The method of claim 1,
The formwork is an extrusion hypothesis for the upper slab extrusion hypothesis of the bridge using the formwork and the rail, characterized in that the steel formwork which is demolded downward after the upper slab is formed in the extrusion slab workbench. delete The method of claim 1,
When the upper slab reaches the final position, the shear pocket portion is filled with the non-shrink mortar to synthesize the upper slab and the upper flange, and prevents leakage of the filler material during secondary casting with the non-shrink mortar through the shear pocket portion. Extrusion apparatus for extruded hypothesis of the upper slab of the bridge using the formwork and the rail further comprising a pad for preventing the secondary pour filling material is installed on both ends of the upper flange to prevent leakage. The method of claim 1,
The upper slab is an extrusion hypothesis for extruded hypothesis of the upper slab of the bridge using the formwork and the rail, characterized in that applied to the steel box girders or minority girders capable of extrusion hypothesis. In the construction method for the upper slab extrusion hypothesis in a steel composite bridge having a girder and the upper slab,
a) installing the girder on which the upper flange is formed on the alternating or pier;
b) placing the tunnel forming formwork and the shear pocket forming form on the workbench flange in the extrusion workshop;
c) arranging a rail along the upper flange of the girder to adjust the transverse direction of the upper slab segment;
d) fabricating an upper slab segment having a tunnel shape formed on a lower surface thereof using the formwork and the pocket formwork and having a front pocket portion and a general portion;
e) demoulding the pocket formwork and the formwork, separating the upper slab segment from a fabrication flange;
f) placing an extrusion jack on top of the workbench flange;
g) continuously extruding the upper slab segment along the rail using an extrusion jack; And
h) synthesizing the upper slab with the upper flange on the shear pocket opening after the extrusion of the upper slab is completed;
Construction method for the upper slab extrusion hypothesis of bridges using formwork and rail comprising a.

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