KR101229555B1 - Incremental launching apparatus for constructing concrete slab of composite bridge using air wheel - Google Patents

Abstract

When the upper slab of the composite bridge is constructed by the extrusion construction method, an extrusion hypothesis device is used to construct the upper slab of the composite bridge using the air wheel, which can quickly and easily extrude the upper slab using the air wheel. Is provided. Extrusion hypothesis apparatus for constructing upper slab of steel composite bridge using air wheels is an extrusion hypothesis apparatus for upper slab in steel composite bridge having steel box girder and upper slab. Extrusion apparatus for continuously extruding the upper slab segment provided in the steel box girder upper portion; A rotating shaft fixing plate provided attached to the steel box girder; A steel rotating shaft installed on the rotating shaft fixing plate and inserted into the rotating shaft fixing plate; And an air wheel that is fastened to the steel rotating shaft and supports the upper slab segment that is continuously extruded, and moves in the extrusion direction, wherein the steel rotating shaft and the air wheel are removed from the rotating shaft fixing plate after the extrusion hypothesis of the upper slab. do.

Description

Extrusion construction apparatus for constructing upper slab of steel composite bridge using air wheel {INCREMENTAL LAUNCHING APPARATUS FOR CONSTRUCTING CONCRETE SLAB OF COMPOSITE BRIDGE USING AIR WHEEL}

The present invention relates to an extrusion hypothesis of an upper slab, and more specifically, an upper slab extrusion hypothesis apparatus (Incremental Launching Method (ILM) using an air wheel to construct a concrete slab of a composite bridge. It is about.

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.

Since the cast-in-place concrete is heavily influenced by the climate and requires periods such as installation of bundling and formwork, the construction period is long, labor costs are increased due to the need of many manpower, and the quality is lacking due to the lack of skilled manpower. It has a problem of poor management.

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.

Specifically, in the case of temporary / left-in-place form, cracking occurs at the contact surface with cast-in-place concrete, and slab thickness becomes excessive due to application of design rules for composite slab, and permanent formwork and Cross section bending stiffness is disadvantageous due to the increase of dead weight due to the number of workers, and there is a problem in safety, such as a fall accident due to work in high altitude.

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 a lower portion of 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 size of the partition is limited due to transportation obstacles, and a number of construction joints require the installation of longitudinal tendons. There is a problem that increases.

An alternative to these problems is a method of fabricating and extruding the upper slab between the precast deck and alternating rear or middle of the bridge.

At this time, the precast deck can produce high quality spheres through long-term curing stability, accurate dimensions and industrialized molding process, but because of the small size of the transportable segment, it causes a large number of joints in the upper slab, Since the upper slab is integrated by the longitudinal steel wire, special care should be taken to prevent the steel wire from corroding.

Particularly, the upper slab extrusion hypothesis method is a method of manufacturing the upper slab of a certain length at the rear of the shift or the center of the span to continuously extrude the bridge girder and install the shear connector to form a composite with the girder. Despite the many advantages of the process, the research is still in its infancy and needs to be improved.

1) Republic of Korea Patent No. 10-0432436 (Application Date: July 28, 2000). Name of the invention: "Extrusion combined use device and method of construction for launching bridge top plate" 2) Republic of Korea Patent No. 10-0565360 (Application Date: July 18, 2003). Title of the Invention: "Extrusion system for pushing upper girder in a bridge under a continuous extrusion method" 3) Republic of Korea Patent No. 10-0580819 (Application Date: July 20, 2005). Title of the Invention: "Continuous extrusion method of discontinuous bridges using joining" 4) Republic of Korea Patent Publication No. 2005-0110454 (published: November 23, 2005). Title of the invention: "Method of constructing bridge using box girder formwork system for IRM bridge" 5) Republic of Korea Patent No. 10-0734418 (filed 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) Republic of Korea Patent No. 10-0869114 (filed 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 is, when the upper slab of the steel composite bridge construction by the extrusion construction method, the air wheel can be quickly and easily extruded by using the air wheel, the air wheel It is to provide an extrusion construction apparatus for constructing the upper slab of the steel composite bridge using.

As a means for achieving the above-described technical problem, the extrusion hypothesis device for constructing the upper slab of the steel composite bridge using the air wheel according to the present invention, the steel slab girder and the upper slab in the composite steel bridge having the upper slab An extrusion apparatus, comprising: an extrusion apparatus for continuously extruding an upper slab segment which is manufactured at an alternating rear extrusion workshop and continuously provided at an upper portion of a steel box girder; A rotating shaft fixing plate provided while being attached to the steel box girder; A steel rotating shaft installed on the rotating shaft fixing plate and inserted into the rotating shaft fixing plate; And an air wheel fastened to the steel rotating shaft and supporting the continuously extruded upper slab segment, and moving in the extrusion direction, wherein the steel rotating shaft and the air wheel are installed after the extrusion hypothesis of the upper slab. It is characterized in that it is removed from.

Here, the air wheel is characterized in that when the continuous extrusion of the upper slab is completed, the air pressure is removed, the air wheel from which the air pressure is removed and the steel shaft is removed from the rotating shaft fixing plate.

Here, the rotating shaft fixing plate is formed to extend downward from the upper flange of the steel box girder, it may be manufactured in advance in the factory attached to the steel box girder.

Here, the rotating shaft fixing plate is characterized in that the fastening hole is formed is fastened by the steel shaft is inserted.

Here, the steel rotating shaft to which the air wheel is fastened, characterized in that is installed in the fastening hole of the rotating shaft fixing plate through the washer and the fastening bolt.

Here, the diameter of the air wheel is characterized in that it corresponds to the height from the steel shaft to the end of the shear connector of the steel box girder.

Here, the minimum width of the air wheel is characterized in that it is variable corresponding to the size of the upper slab segment and the capacity of the air wheel.

According to the present invention, when the upper slab of the composite bridge is constructed by the extrusion construction method, it is possible to quickly and easily extrude the upper slab using an air wheel, thereby significantly shortening the construction period of the bridge.

According to the present invention, the air wheel can be removed and reused after extrusion of the upper slab.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram illustrating a typical method of constructing an upper slab by extrusion.
2 is a diagram illustrating an upper slab for a composite bridge.
3 is a view showing the formwork installation means installed behind the shift.
4 is a configuration diagram of an extrusion hypothesis device for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention.
5 is a view for explaining the concept of the extrusion construction method for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention.
6 is a view showing an extrusion mechanism in the extrusion construction method for constructing the upper slab of the composite bridge using the air wheel according to an embodiment of the present invention.
FIG. 7 is a view illustrating an air wheel installed on a steel box girder in an extrusion construction method for constructing an upper slab of a steel composite bridge using an air wheel according to an embodiment of the present invention.
8 is a view illustrating a rotating shaft fixing plate in the extrusion construction method for constructing the upper slab of the composite bridge using the air wheel according to an embodiment of the present invention.
9 is a view illustrating the fastening of the rotary shaft fixing plate and the steel rotary shaft in the extrusion construction method for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention.
10A to 10F are diagrams illustrating steel rotating shafts which are fastened to a rotating shaft fixing plate in an extrusion construction method for constructing an upper slab of a steel composite bridge using an air wheel according to an embodiment of the present invention.
FIG. 11 is a view illustrating extrusion hypothesis members in an extrusion hypothesis method for constructing an upper slab of a steel composite bridge using an air wheel 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 part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

First, a conventional extrusion construction method of the upper slab will be described with reference to FIGS.

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 on the steel box girder 200 in the direction that the bridge is to be installed by the extrusion device (not shown), that is, the axial direction -1 ~ 100-n) is a construction method to form a bridge integrated as a whole by successively pushing out.

Specifically, in FIG. 1 a), the steel box girder 200 is installed on the shift 310, and the first upper slab 100-1 to be extruded in the extrusion workshop 400 behind the shift 310 is manufactured. 1, b) shows that the second upper slab 100-2 is fabricated, and then the second upper slab 100-2 is disposed behind the first upper slab 100-1. Extruded from the top of the box girder 200, c) of FIG. 1 shows continuously extruding the first to sixth upper slab (100-1 ~ 100-6) from the top of 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.

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.

In addition, Figure 2 is a view illustrating an upper slab of a steel composite bridge for extrusion hypothesis, Figure 2a) shows a shear pocket type upper slab (100a) is extruded on the steel box girder, Figure 2b) is only rebar A rail-shaped upper slab 100b, a transversely connected precast slab, is also shown, and c) of FIG. 2 shows an I-beam placed longitudinally on the upper flange of the steel box girder and an extruded slab over the rail. The upper slab 100c is shown.

3 is a view showing a means for installing a formwork (not shown) installed behind the shift, first, when the steel box girders 200 are installed, a slab casting bed is installed in the middle or shift 310 of the bridge. . 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. 3, the formwork (not shown) installed on the ground behind the shift consists of reinforced wood except for two strips having the same width as the upper flange of the steel box girder, and the steel box. It is aligned with the upper flange of the girder. 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, construction of a steel composite bridge having precast decks is possible by various methods, and the stage-deck jacking method (hereinafter, referred to as slab extrusion method) in the following steps is performed in the following steps. Can be configured.

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.

Hereinafter, an extrusion hypothesis apparatus for constructing an upper slab of a steel composite bridge using an air wheel according to an embodiment of the present invention and a method thereof will be described with reference to FIGS. 4 to 11, but will be described with reference to FIGS. 1 to 3. The same reference numerals are used.

Figure 4 is a block diagram of an extrusion construction apparatus for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention.

Referring to Figure 4, the extrusion hypothesis device for constructing the upper slab of the steel composite bridge using the air wheel according to an embodiment of the present invention, the extrusion hypothesis of the upper slab in a steel composite bridge having a steel box girder and the upper slab The apparatus may include an extrusion apparatus, a rotating shaft fixing plate 220, a steel rotating shaft 510, and an air wheel 520.

An extrusion apparatus (not shown) continuously extrudes the upper slab segments 100-1 and 100-2, which are manufactured and continuously provided in the extrusion workshop 400 at the rear of the steel box girder 200.

The rotating shaft fixing plate 220 is provided in a state attached to the steel box girder 200. At this time, the rotating shaft fixing plate 220 is formed to extend downward from the upper flange 210 of the steel box girder 200, it may be prepared in advance in the factory attached to the steel box girder 200. In addition, the rotating shaft fixing plate 220 is formed with a fastening hole to which the steel rotating shaft 510 is inserted and fastened.

Steel rotating shaft 510 is installed on the rotating shaft fixing plate 220, it is inserted and fixed to the rotating shaft fixing plate 220. At this time, the steel rotating shaft 510 is installed in the fastening hole of the rotating shaft fixing plate 220 through the washer and the fastening bolt 530.

 An air wheel 520 is fastened to the steel rotating shaft 510 and supports the continuously extruded upper slab segments 100-1 and 100-2 to advance in the extrusion direction.

At this time, the steel rotating shaft 510 and the air wheel 530 is removed from the rotating shaft fixing plate 220 after the extrusion hypothesis of the upper slab. At this time, the air wheel 520 is the air pressure is removed, when the continuous extrusion of the upper slab is completed, the air wheel 520 and the steel rotary shaft 510 from which the air pressure is removed from the rotary shaft fixing plate 220 Removed.

In this case, the diameter of the air wheel 520 is variable corresponding to the height from the steel shaft 510 to the end of the shear connector of the steel box girder 200, the minimum width of the air wheel 520 is The upper slab segments 100-1 and 100-2 may vary in size and capacity of the air wheel 520.

On the other hand, Figure 5 is a view for explaining the concept of the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to an embodiment of the present invention, Figure 6 is an air wheel according to an embodiment of the present invention A diagram showing the extrusion mechanism in the extrusion construction method for constructing the upper slab of the steel composite bridge using a.

5 and 6, the extrusion construction method for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention, first, the steel box girder 200 and the upper slab 100 In the extrusion construction method of the upper slab in the steel composite bridge provided, the steel box girders 200 on which the rotating shaft fixing plate 220 is formed are installed on the alternating 310 or the piers 320. At this time, the steel box girder 200 is manufactured in advance in the factory in the state that the rotating shaft fixing plate 220 is formed to extend downward from the upper flange 210.

Next, the steel rotating shaft 520 to which the air wheel 510 is fastened is hypothesized on the rotating shaft fixing plate 220.

Here, the rotating shaft fixing plate 220 may be formed with a fastening hole 230 to which the steel rotating shaft 520 is inserted and fastened, and the steel rotating shaft 520 to which the air wheel 510 is fastened is a washer ( 540 and a fastening bolt 530 are hypothesized in the fastening hole 230 formed in the rotating shaft fixing plate 220.

Specifically, the diameter and thickness of the steel rotary shaft 520 is variable corresponding to the size of the upper slab segments (100-1 ~ 100-n) and the arrangement interval of the steel rotary shaft 520, the steel rotary shaft 520 ) May be varied depending on the size of the upper slab segments 100-1 to 100-n and the capacity of the air wheel 510. In addition, the diameter of the air wheel 510 is variable corresponding to the height from the steel shaft (100-1 ~ 100-n) to the end of the shear connector of the steel box girder 200, the air wheel 510 The minimum width of the upper slab segment (100-1 ~ 100-n) may be variable corresponding to the size and capacity of the air wheel 510.

Next, the upper slab segments 100-1 to 100-n are sequentially manufactured in the extrusion workshop 400 behind the alternating 310. At this time, the upper slab is a concrete slab, is produced by the formwork.

Next, the upper slab segments 100-1 to 100-n are continuously extruded from the upper portion of the steel box girder 200 using the air wheel 510. Here, the upper slab segments 100-1 to 100-n are in contact with the air wheels 510, respectively, and are extruded forward by the rotation of the air wheels 510.

For example, when the upper slab 100 is composed of three upper slab segments 100-1, 100-2, and 100-3, a) of FIG. 4 manufactures the first upper slab segment 100-1. 4, b) 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 upper slab segment 100-3 is manufactured 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 .

Next, after the extrusion hypothesis of the upper slab 100, the air wheel 510 and the steel rotary shaft 520 installed on the rotary shaft fixing plate 220 is removed.

That is, as shown in a) of Figure 5, when the continuous extrusion of the upper slab 100 is completed, as shown in b) of Figure 5, the air wheel hypothesized on the rotating shaft fixing plate 220 The air pressure 510 is removed, and then, as shown in c) of FIG. 5, the air wheel 510 from which the air pressure is removed and the steel rotating shaft 520 are removed from the rotating shaft fixing plate 220. .

Subsequently, the extrusion hypothesis is completed by synthesizing the extruded upper slab 100 with the upper flange 220 of the steel box girder 200.

According to the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention, when constructing the upper slab 100 of the steel composite bridge by the extrusion construction method, the air wheel 510 By using the upper slab 100 can be quickly and easily extruded.

Meanwhile, FIG. 7 is a view illustrating an air wheel installed on a steel box girder in an extrusion construction method of constructing an upper slab of a steel composite bridge using an air wheel according to an embodiment of the present invention. 7 is a bottom plan view, and b) of FIG. 7 shows an air wheel 510 installed on the steel box girder 200, and c) of FIG. 7 is a side view of the fastening bolt 530. 540 is used to indicate the fixation on the rotating shaft fixing plate 220.

On the other hand, Figure 8 is a view illustrating a rotating shaft fixing plate in the extrusion construction method for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention.

In the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention, the rotating shaft fixing plate 220 is as shown in a) of FIG. 8, the upper flange 210 lower portion. Is formed in, is fastened to the fastening bolt 540 through the fastening hole 230, and 240a denotes a mounting portion on which the steel shaft 520 is mounted.

At this time, the fastening hole 230 and the steel shaft mounting portion 240a becomes a portion where the stress is concentrated.

FIG. 8B and FIG. 8C show circular steel rotating shafts 520a mounted on the steel rotating shaft holder 240a, respectively, and show that washers 540a and 540b have different sizes. In addition, d) of FIG. 8 shows a rectangular steel rotary shaft holder 240b, and FIG. 8 e) shows a rectangular steel rotary shaft holder 520b mounted on the rectangular steel rotary shaft holder 240b.

On the other hand, Figure 9 is a view illustrating the fastening of the rotary shaft fixed plate and the steel shaft in the extrusion construction method for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention.

In the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention, the steel rotating shaft 520, as shown in Figure 9a) to 9h), It can be fastened with various types of rotating shaft fixing plate.

Therefore, in the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention, the shape of the shape of the rotating shaft fixing plate 220 may vary.

On the other hand, Figures 10a to 10f is a diagram illustrating a steel rotary shaft which is fastened to the rotating shaft fixing plate in the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention, respectively.

As shown in Figure 10a and 10b, the steel rotary shafts (520a, 520b) fastened to the rotating shaft fixing plate in the extrusion construction method for constructing the upper slab of the steel composite bridge using an air wheel according to an embodiment of the present invention It may be a seamless tubular shape.

In addition, as illustrated in FIG. 10C, the steel rotating shaft 520c fastened to the rotating shaft fixing plate may have a screw thread formed at an intermediate portion thereof and fastened to each other.

In addition, as shown in FIG. 10D, the steel rotating shaft 520d fastened to the rotating shaft fixing plate may be fastened by a thread formed at both ends, and as shown in FIG. 10E, the steel rotating shaft 520d may be fastened to the rotating shaft fixing plate. The steel rotating shaft 520e may be in the form of a single tube having a groove formed in the mounting portion of the rotating shaft fixing plate 220, and as shown in FIG. 10F, the steel rotating shaft 520f fastened to the rotating shaft fixing plate is fixed to the rotating shaft. The mounting portion of the plate 220 may be in the form of a single tube without a groove.

Therefore, in the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention, the steel rotating shaft fastened to the rotating shaft fixing plate is not limited to the shape shown in FIGS. 10A to 10F. It will be apparent to those skilled in the art that these may vary.

On the other hand, Figure 11 is a view illustrating the extrusion construction members in the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to an embodiment of the present invention.

That is, FIG. 11 shows the air wheel 510 and the steel rotating shaft 520 which are the extrusion temporary members in the extrusion construction method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention.

At this time, the diameter (d) and thickness of the steel rotary shaft 520 to which the air wheel 510 is fastened is the size of the upper slab segments (100-1 ~ 100-n) and the spacing (S) of the steel rotary shaft 520 Can be varied according to

In addition, the arrangement interval S of the steel rotating shaft 520 may vary depending on the size of the upper slab segments 100-1 to 100-n and the capacity of the air wheel 510.

In addition, the diameter (Dtire) of the air wheel 510 is variable in response to the height from the steel shaft (100-1 ~ 100-n) to the end of the shear connector of the steel box girder 200, the air wheel The minimum width of the 510 may vary depending on the size of the upper slab segments 100-1 to 100-n and the capacity of the air wheel 510.

For example, the air wheel 510 may be selected in consideration of its diameter, width, load and pressure.

In addition, the height h of the rotating shaft fixing plate 220 may be determined by comprehensively considering the arrangement interval of the steel rotating shaft 520 and the capacity of the air wheel 510.

As a result, according to the extrusion hypothesis method for constructing the upper slab of the steel composite bridge using the air wheel according to the embodiment of the present invention, when the upper slab of the steel composite bridge is constructed by the extrusion hypothesis method, The slab can be extruded quickly and easily.

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: Concrete Upper Slab 200: Steel Box Girder
210: upper flange 220: rotating shaft fixing plate
230: fastening hole 310: shift
320: pier 400: extrusion workshop
510: Air wheel 520: steel rotation axis
530: tightening bolt 540: washer

Claims (7)

In the extrusion placing apparatus of the upper slab in a steel composite bridge having a steel box girder and the upper slab,
An extrusion apparatus for continuously extruding the upper slab segments which are manufactured and continuously provided in the extrusion workshop at the rear of the alternating steel girder;
A rotating shaft fixing plate provided while being attached to the steel box girder;
A steel rotating shaft installed on the rotating shaft fixing plate and inserted into the rotating shaft fixing plate; And
An air wheel fastened to the steel shaft and supporting the continuously extruded upper slab segment to proceed in the extrusion direction
Including but not limited to:
And the steel rotating shaft and the air wheel are removed from the rotating shaft fixing plate after the extrusion hypothesis of the upper slab. The extrusion hypothesis apparatus for constructing the upper slab of the steel composite bridge using the air wheel. The method of claim 1,
When the air wheel is completed the continuous extrusion of the upper slab, the air pressure is removed, the air wheel from which the air pressure is removed and the steel shaft is removed from the rotating shaft fixed plate, the composite bridge using the air wheel Extrusion installation apparatus for constructing the upper slab of the. The method of claim 1,
The rotating shaft fixing plate extends downwardly from the upper flange of the steel box girder, and constructs the upper slab of the steel composite bridge using an air wheel, which is prefabricated in the factory in a state of being attached to the steel box girder. Extrusion installation apparatus. The method of claim 1,
The rotating shaft fixing plate is an extrusion construction apparatus for constructing the upper slab of the steel composite bridge using an air wheel, characterized in that the fastening hole is formed is formed by the steel shaft is inserted into the rotating shaft. The method of claim 1,
Extrusion hypothesis for constructing the upper slab of the steel composite bridge using the air wheel is characterized in that the steel shaft is fastened to the fastening hole of the rotating shaft fixing plate through the washer and the fastening bolt. The method of claim 1,
Extruding apparatus for constructing the upper slab of the steel composite bridge using the air wheel, characterized in that the diameter of the air wheel is variable corresponding to the height from the steel shaft to the end of the shear connector of the steel box girder. The method of claim 1,
The minimum width of the air wheel is an extrusion hypothesis device for constructing the upper slab of the steel composite bridge using the air wheel, characterized in that the variable corresponding to the size of the upper slab segment and the capacity of the air wheel.

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