KR20100091355A

KR20100091355A - Pedestrian bridge using filled double steel tube

Info

Publication number: KR20100091355A
Application number: KR1020090010508A
Authority: KR
Inventors: 이기홍
Original assignee: 비비엠코리아(주)
Priority date: 2009-02-10
Filing date: 2009-02-10
Publication date: 2010-08-19

Abstract

PURPOSE: A pedestrian bridge using a double steel tube is provided to improve structural stability by reducing the total weight of the bridge and achieve beautiful exterior by making the bridge structure slender. CONSTITUTION: A pedestrian bridge using a double steel tube comprises an outer steel pipe(110), an inner steel pipe(120), a partition(130), and a deck plate. The inner steel pipe is inserted inside the outer steel pipe. The partition is coupled between the inner and the outer steel pipe to divide the space between the inner and the outer steel pipe to upper and lower sections, wherein concrete is placed in the upper section. The deck plate is placed on the top of the outer steel pipe. A plurality of reinforcing joint members are projected on the exterior of the outer pipe to improve the coherence with concrete of the deck plate.

Description

Pedestrian bridge Using Filled Double Steel Tube}

The present invention comprises a girder of a sidewalk bridge made of a double steel pipe, by placing concrete on a portion of the inner upper side of the double steel pipe, while reducing the weight of the whole sidewalk bridge, the invention relates to a sidewalk bridge that can efficiently cope with the compressive force applied at the top and the tensile force at the bottom to be.

In general, the sidewalk bridges, which are built across roads and allow people to pass through, are constructed by pouring concrete while reinforcing bars. However, the compressive force exerted on the upper side of the bridge, in particular the center portion, causes the lower side of the bridge to generate tension. Therefore, after a long period of time, the sidewalk bridge will not endure the compressive and tensile forces, and the concrete will be damaged and there is a risk of collapse.

Recently, in order to solve such a conventional problem, a steel box girder that combines a steel plate in a square shape between two pillars is coupled, and a top plate that is a separate concrete structure is mounted on the steel box girder, or concrete is poured directly on the top plate. It also replaces.

However, in the case of long bridges, as the load on the center of the girders is enormously increased, the steel box girders must also use thick steel plates to handle them.

In particular, the cross-sectional size of the girder is determined from the size of the maximum bending moment or shear moment generated at the center of the girder, and the bending moment becomes smaller and smaller in a parabolic form from the center of the girder toward each point.

However, the size of the cross section becomes larger due to the size of the cross section based on the maximum static moment occurring at the center of the ground for the convenience of manufacture and construction of the girder, and the girder cross section becomes larger than necessary. It can also become thick.

Therefore, there is a problem that the consumption of expensive steel sheet increases and the construction cost increases.

In addition, the weight of the steel plate of the steel box increases the load of the sidewalk bridge, which causes the need to reinforce the strength of the various members supporting the structure. Due to these reasons, the material cost is increased and the economical efficiency is lowered, and the overall stability of the structure is also reduced.

On the other hand, in recent years, in addition to the stability of the structure, the appearance of the structure is a trend that is important, in the case of the prior art bridges using concrete as the main material, the appearance of the structure is enlarged, and thus the aesthetics are deteriorated. .

On the other hand, in the pedestrian bridge according to the prior art, as the construction of the formwork and the assembly of the longitudinal reinforcing bars and reinforcing bars, etc. are made in the field, there is a problem that not only the inconvenience of construction, but also the air increases.

In addition, in the prior art, the reinforcement of the reinforcing bar and the concrete is made by the field workers, which is a problem that the quality fluctuations are severely affected by the skill of the field workers.

Therefore, there has been a great demand for the development of a pedestrian bridge that can improve the economic efficiency by reducing materials such as concrete by improving the overall strength of the pedestrian bridge.

In addition, by improving the strength of the member to be used, it has been required to reduce the overall weight of the sidewalk bridge, as well as to develop a sidewalk bridge that can secure the beautiful appearance of the structure.

In addition, by using a precast member that can be used for construction immediately after being manufactured at the factory and transported to the site, there has been a great demand for the development of a pedestrian bridge that can simplify construction and shorten the air and ensure uniformity of quality. .

The pedestrian bridge using the double steel pipe according to the present invention,

By improving the overall strength of the pedestrian bridge, it aims to reduce the material such as concrete to increase the economics.

In addition, the sidewalk bridge using a double steel pipe according to the present invention,

By improving the strength of the member, it is aimed to reduce the overall weight of the sidewalk bridge to improve the safety of the structure, and to enhance the aesthetics of the structure by forming the structure slenderly.

By using a precast member that can be used for construction immediately after being manufactured at the factory and transported to the site, it aims to simplify construction and shorten the air and ensure uniformity of quality.

The configuration of the present invention for achieving the above object is an outer steel pipe; An inner steel pipe inserted into the outer steel pipe; A blocking plate coupled between an outer surface of the inner steel pipe and an inner surface of the outer steel pipe to divide up and down between the outer surface of the inner steel pipe and the inner surface of the outer steel pipe; And an upper plate placed on an upper surface of the outer steel pipe.

According to an embodiment of the present invention, the concrete is poured between the upper outer steel pipe and the inner steel pipe of the blocking plate is another feature.

According to one embodiment of the invention, the inner surface of the outer steel pipe is characterized in that the studs are further formed.

According to one embodiment of the invention, the studs are further protruded from the outer surface of the inner steel pipe.

According to an embodiment of the present invention, a plurality of reinforcing connectors protrude from the outer steel pipe outer surface on which the concrete is poured to increase the bonding strength with the concrete.

According to an embodiment of the present invention, the reinforcing connector is partially cut from the upper side to the lower side, and the other end is bent alternately formed to the left or right side.

The pedestrian bridge using the double steel pipe according to the present invention, by improving the overall strength of the pedestrian bridge, there is an effect of reducing the material, such as concrete, to increase the economic efficiency.

In addition, the sidewalk bridge using the double steel pipe according to the present invention, by improving the strength of the member, by reducing the overall weight of the bridge can improve the safety of the structure, by forming the structure slender can significantly increase the aesthetics of the structure It works.

In addition, the pedestrian bridge using the double steel pipe according to the present invention, by using a precast member that can be used for construction immediately after being manufactured in the factory and transported to the site, by simplifying the construction to significantly shorten the air, uniformity of quality Has the effect of securing.

Hereinafter, the configuration of the most preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view showing a double steel pipe according to the present invention, Figure 2 is a cross-sectional view showing a longitudinal cross section of the double steel pipe according to the present invention.

As shown in Figure 1 and 2, the double steel pipe 100 according to the present invention is configured by inserting the inner steel pipe 120 of a smaller diameter than the outer steel pipe 110 in the interior of the outer steel pipe (110).

The blocking plate 130 is connected between the inner surface of the outer steel pipe 110 and the outer surface of the inner steel pipe 120. The blocking plate 130 is connected between the inner surface of both outer steel pipe 110 and the outer surface of the inner steel pipe 120, respectively, and divides the inner surface of the outer steel pipe 110 and the outer surface of the inner steel pipe 120 up and down.

3 and 4 is a perspective view showing another embodiment of the pedestrian bridge using the double steel pipe according to the present invention.

As shown in FIGS. 3 and 4, the blocking plate 130 is coupled between the outer steel pipe 110 and the inner steel pipe 120 such that the three blocking plates 130 form an acute angle with each other.

The blocking plate 130 connected between the lower portion of the outer steel pipe 110 and the inner steel pipe 120 may not be installed depending on the design strength of the structure. In this case, the two blocking plates 130 are installed at an acute angle with each other. Such modifications will belong to the technical scope of the present invention as will be apparent to those skilled in the art.

5 and 6 show another embodiment of the pedestrian bridge using the double steel pipe according to the present invention.

5 and 6, when there is a need to increase the strength of the structure, it is also possible to install a plurality of blocking plates 130 between the outer steel pipe 110 and the inner steel pipe 120. .

As shown in FIG. 6, the concrete 200 between the outer steel pipe 110 and the inner steel pipe 120 is poured and cured. Figure 6 shows that the concrete 200 is poured over the entire surface between the outer steel pipe 110 and the inner steel pipe 120, which shows one embodiment of the pedestrian bridge using the double steel pipe according to the present invention It is only.

That is, it is also possible to pour concrete only in a specific section (for example, in the concrete section only) of the divided sections according to the design strength of the sidewalk bridge. Such modifications will also constitute the subject matter of the present invention.

Stud 140 is a configuration for increasing the coupling force between the double steel pipe 100 and the concrete 200. The stud 140 is formed to protrude on the inner surface of the outer steel pipe 110 or the outer surface of the inner steel pipe 120.

If there is a need to improve the strength of the structure, it will be apparent to those skilled in the art that the stud 140 may be simultaneously installed on the inner surface of the outer steel pipe 110 and the outer surface of the inner steel pipe 120, which is also the technical of the present invention. Will be included in the category.

As shown in FIG. 6, the reinforcing connection member 150 has a plurality of protrusions formed on the outer surface of the outer steel pipe 110 to increase the bonding force with the concrete 200 of the upper plate 300. The reinforcing connector 150 is partially cut from the upper end to the lower side, and is formed by alternately bending the end of the cut upper side to the left or the right.

7 is a cross-sectional view showing a longitudinal cross section of the pedestrian bridge using the double steel pipe according to the present invention.

The lower steel plate is provided with a double steel pipe 100 having a reinforcing connection member 150 in the lower portion of the upper plate 300, the inner steel pipe 120 is in a hollow state, the outer steel pipe 100 and the double steel pipe 100 Concrete 200 is poured between the inner steel pipe (120).

Figure 8 illustrates an embodiment of the pedestrian bridge using the double steel pipe according to the present invention.

A plurality of double steel pipes 100 are fixedly installed side by side in the transverse direction between the vertical pillars 11, and between the outer steel pipe 110 and the inner steel pipe 120 on both side blocking plates 130 or the outer steel pipe 110. ) And the concrete 200 is poured over the entire surface of the inner steel pipe 120.

On the upper side of the double steel pipe 100 is installed a separate top plate 300. Of course, it is also possible to replace the upper plate 300 by pouring concrete 200 directly on the double steel pipe (100).

When reinforcing concrete on the upper surface of the double steel pipe 100, the reinforcing connection member 150 protruding on the outer surface of the outer steel pipe 110 is combined with the concrete of the upper plate 300, the adhesion strength is significantly increased.

1 is a perspective view showing a double steel pipe of a pedestrian bridge using a double steel pipe according to the present invention.

Figure 2 is a cross-sectional view showing a longitudinal section of the double steel pipe of the pedestrian bridge using the double steel pipe according to the present invention.

Figure 3 is a perspective view showing a double steel pipe according to another embodiment of the sidewalk bridge using a double steel pipe according to the present invention.

4 is a perspective view illustrating a state in which concrete is poured into a double steel pipe according to another embodiment of a sidewalk bridge using a double steel pipe according to the present invention.

5 is a perspective view showing a double steel pipe according to another embodiment of the sidewalk bridge using a double steel pipe according to the present invention.

Figure 6 is a cross-sectional view showing a longitudinal cross section of the double steel pipe according to another embodiment of the sidewalk bridge using a double steel pipe according to the present invention.

8 is a perspective view showing one embodiment of a pedestrian bridge using a double steel pipe according to the present invention.

100: double steel pipe 110: outer steel pipe

120: internal steel pipe 130: blocking plate

140: reinforcing connector 150: stud

200: concrete 300: top plate

Claims

Outer steel pipe;

An inner steel pipe inserted into the outer steel pipe;

A blocking plate coupled between an outer surface of the inner steel pipe and an inner surface of the outer steel pipe to divide up and down between the outer surface of the inner steel pipe and the inner surface of the outer steel pipe; And

The pedestrian bridge using a double steel pipe made of a top plate placed on the upper surface of the outer steel pipe.

The method of claim 1,

Sidewalk bridge using a double steel pipe, characterized in that the concrete is poured between the upper outer steel pipe and the inner steel pipe of the blocking plate.

The method according to claim 1 or 2,

Press bridge using the heavy steel pipe, characterized in that the inner surface of the outer steel pipe stud protruding.

The method according to claim 1 or 2,

Sidewalk bridge using a double steel pipe, characterized in that the stud protrudes on the outer surface of the inner steel pipe.

The method of claim 3, wherein

Sidewalk bridge using a double steel pipe characterized in that the outer steel pipe outer surface where the concrete is poured, a plurality of reinforcing connection member is protruded to increase the bonding force with the concrete of the top plate.

The method of claim 4, wherein

Sidewalk bridge using a double steel pipe, characterized in that the outer surface of the outer steel pipe in which the concrete is poured, a plurality of reinforcing connection member is protruded to increase the bonding force with the concrete of the top plate.

The method of claim 5,

The reinforcement connecting portion is partially cut from the upper side to the lower side, the pedestrian bridge using a double steel pipe, characterized in that the cut end is bent alternately to the left or right.

The method of claim 6,