KR100589120B1 - Curved arch bridge - Google Patents

Abstract

The present invention, while placing the jade bending plate 20 bent in the form of arch between the foundation (10) with reinforced concrete while standing side wall (30) at both ends thereof integrally with the foundation (10) from the side wall (30) Up to the connecting point of the left and right sides to form the wing wall 40 to form a cut-out structure, the side wall 30 has a cylindrical curved surface from the top to the bottom, the wing wall 40 is extended from the side wall to the outside It relates to an arch bridge having a spherical curved surface in the inner direction,

By curving the side walls and wing walls outwards, it is possible to remarkably reduce the eddy currents occurring in the front and rear of the bridge, thereby reducing the added load, and variably adjusting the length of the wing walls on both left and right sides. It is possible to reduce the place cost and reduce the material cost as well as to prevent the flooding of the flooded or rainy season from hitting the side wall of the bridge and flooding the road above the side surface. It has the additional effect of having excellent aesthetics.

Bridges, Foundations, Arched Plates, Sidewalls, Wing Walls, Fill Layers

Description

Curved arch bridge {An curving Arch-Bridge}

1 is a perspective view showing a conventional arch plate structure bridge

Figure 2 is a schematic diagram showing the flow of running water for the conventional arch bridge

3 is a perspective view showing the arch bridge of the present invention

4 is a cross-sectional view taken along the line AA ′ of FIG. 2;

5 is a perspective view showing a state of use of the present invention

Figure 6 is a schematic diagram showing the flow of running water for the arch bridge of the present invention

<Detailed description of the major symbols in the drawings>

10: Foundation

20: arched tablets

30: sidewall

40: wing wall

50: fill layer

60: road

The present invention relates to a jade bridge formed by reinforcing reinforced concrete, and more specifically, it can significantly reduce the eddy currents generated in the front and rear of the bridge, the variable length of the wing wall on both sides In addition, the present invention relates to a curved jade bridge that can be controlled as well as to prevent the flow of water blown during the rainy season from hitting the side wall of the bridge and flooding the road above the side.

Generally, bridges are bridges installed between a valley or a river to allow people or vehicles to cross, and are classified according to the location, use, materials used, and superstructure of the bridge.

The most common method of classifying such bridges is to classify them according to the superstructure.Girder Bridge, Simple beam bridge, Continuous bridge, Gerber bridge, Truss bridge, Arch bridge, Ramen bridge, Suspension bridge, Cable stayed bridge are distinguished, but the present invention relates to the arch bridge only. Let's explain.

In general, arch bridges use the characteristics of arch structures that generate compressive forces in members. Arches that support curved or curved trusses with both sides upward to move horizontally A bridge used as a truss.

Most of the jade-type bridges are made of metal-shaped steel to receive the compressive stress entirely to obtain the ease of construction.However, the use of metal-shaped steel as the material of the jade-type bridge is more expensive than reinforced concrete Although construction costs, including about three times more, were not economical, the construction of reinforced concrete has not been possible until now due to technical problems on the compressive force and the inconvenience of construction.

In Korean Patent Application No. 1991-17376, reinforced concrete is used, but it reinforces the bearing capacity against earth pressure applied to the sidewalls and forms a fill layer on the back surface of the arch in the same plane as the road surface to offset or reduce horizontal reaction force and It has been provided a jade plate structure bridge that can reduce the bending stress of the curved member.

1 is a perspective view showing a conventional arch structure plate, Figure 2 is a schematic diagram showing the flow of running water for a conventional arch structure.

As shown in FIG. 1, the conventional arch bridges are formed by placing concrete walls between the foundation 1 and the arched curved plate 2 with reinforced concrete, and erecting sidewalls 3 at both ends thereof. The rigidity and the supporting force are increased, and the wing wall 4 is formed laterally at the connection point of the side wall 3 and the base 1 to form a cut out structure.

Conventional arch bridges having the above-mentioned structure offset the horizontal reaction force due to the upper load (live load + dead load) to the horizontal horizontal pressure by filling up to the height of the side wall on the upper surface of the arch curved plate, resulting in minimizing the horizontal reaction force. In addition, the remaining horizontal reaction resists the frictional resistance between the foundation and the support base in the conventional manner, while the fill serves to reduce the member stresses in the cross section of the arched plate caused by the live load. It was able to solve the technical problems and the cumbersome construction time about the compression force generated.

However, in the above-described arch bridge, the flowing water facing the edge of the bridge collides with the flowing water passing through the lower end of the arching plate while colliding with the wing wall formed in a straight line and being centered. There is a problem that the stagnant section of the can be formed and the vortices can be generated, so that the flow of the flowing water does not proceed smoothly, and the load is applied to the front and rear of the bridge. This problem is more prominent during flooding or rainy season when the flow rate is increased.

In addition, in order to improve the supporting ability of the earth and sand deposited on the archipelago plate, the wing walls formed on both left and right sides should be formed long enough so that the runoff caused by the sudden increase in quantity during flooding or rainy season with the problem of limitation of installation place While hitting the side wall of the bridge and flooded to the road of the upper side, a problem that caused inconvenience to vehicles or pedestrians crossing the bridge.

Therefore, the present invention is configured to solve the above problems, in the arch bridge formed by reinforcing reinforced concrete, it can significantly reduce the vortex phenomena generated in the front and rear of the bridge, both left and right The length of the wing wall can be adjusted variably to reduce the space constraints and reduce material costs, as well as to prevent flooding or flooding runoff from hitting the bridge's sidewall and flooding the road above the side. It is an object to provide a curved arch bridge.

The present invention to achieve the above object

Placing the arching plate between the foundations with reinforced concrete while erecting sidewalls at both ends thereof, and forming a wing wall laterally at the connection point between the sidewalls and the foundation to form a cut-out structure. In the filled jade bridge,

The side wall is achieved by providing a curved arch bridge, characterized in that it has a cylindrical curved surface from top to bottom and the wing wall extends with the side wall to have a spherical curved surface from the outside to the inside.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited to the embodiments shown in the drawings.

Figure 3 is a perspective view showing the arch bridge of the present invention, Figure 4 is a cross-sectional view taken along the line AA 'of Figure 2, Figure 5 is a perspective view showing a state of use of the present invention.

As shown in FIGS. 3 to 5, the arch bridge of the present invention casts the arch plate 20, which is bent in the arch form between the foundations 10, with reinforced concrete and has side walls 30 integrally at both ends thereof. ) And at the same time up to the connecting point of the base 10 from the side wall 30 to the left and right sides of the wing wall 40 to form a cut out structure, wherein the side wall 30 is cylindrical from the top to the bottom Wing wall 40 extends with the side wall to obtain a reinforced concrete structure having a spherical curved surface from the outside to the inside.

Reinforced concrete structures can be obtained by installing and pouring formwork directly in the place to be installed according to their size, whereas in the case of relatively small structures, they can be installed by placing and curing in separate places and moving to the installation site. To reveal.

In addition, the fill layer 50 is formed up to the height of the sidewall 30 on the upper surface of the arching plate 20 in accordance with the height between the valley or river to install the structure made by pouring reinforced concrete as described above and the same as the road surface The installation is completed by paving the road 60 to a height.

This type of arch bridge bridges the horizontal reaction due to the upper load (live load + dead load) to the filled horizontal earth pressure, thereby minimizing the horizontal reaction and the rest of the horizontal reaction in the existing way. In addition to resisting the frictional resistance between the piles, the fill provides a reduction in the member stresses in the cross section of the swash plate caused by live loads, thereby reducing the technical problems and construction hassles in compressive forces generated by using reinforced concrete as a material. Compared with the bridge of steel plate structure, the horizontal reaction force between the two places can be reduced, thereby reducing the total cost of construction work as well as the material cost input to the basic construction, and by installing the wing walls on both sides in contact with the side wall, To strengthen the bearing capacity for earth pressure and wheel load It has been shown to increase safety.

Figure 6 is a schematic diagram showing the flow of running water for the arch bridge of the present invention.

In the present invention, the side wall and the wing wall of the arch bridge are curved in an outward direction in an integrated state, and as shown in FIG. 6, the flowing water toward the edge of the bridge is moved along the curved wing wall. It is possible to prevent the vortices from occurring in the flow smoothly without collision with the flowing water passing through the bottom of the arching plate, which can reduce the load applied to the front and rear of the bridge.

In addition, the horizontal reaction force acting at the supporting point of the arch bridge is determined by the frictional force caused by the vertical reaction force and the earth pressure of the soil, so the curved arch bridge is structurally safe as the reaction force and earth pressure are reduced by reducing the amount and area of concrete on the back and side. In addition, the wing walls formed on both sides of the left and right sides to improve the supporting ability of the soil deposited on the arched plate also have sufficient support capacity even if the amount of soil is small. You can save money.

In addition, even if the runoff caused by a sudden increase in quantity during flooding or rainy season hits the top of the sidewall of the bridge, it can be guided downward along the curved sidewall to prevent the runoff from flooding to the road. Also, due to the overall curve, the aesthetics are very good.

As described above, the curved arch bridges of the present invention provide the curvature phenomena generated in the front and rear of the bridge by curved out the side walls and the wing walls in the integrated arch bridges by placing reinforced concrete. Significantly reduced, the added load can be reduced, and the length of the wing wall on both left and right sides can be adjusted variably, so it is not limited to places and saves material cost, and it is possible to reduce the flow of water during flooding or rainy season. It is possible to prevent flooding to the roadway of the upper side while colliding with the side wall of the bridge, and has the additional effect that the appearance is excellent due to the overall curve.

Claims (1)

Placing the arching plate between the foundations with reinforced concrete while erecting sidewalls at both ends thereof, and forming a wing wall laterally at the connection point between the sidewalls and the foundation to form a cut-out structure. In the filled jade bridge, Wherein the sidewalls have a cylindrical surface from top to bottom and the wing wall extends with the sidewalls and has a spherical surface from outside to inward.

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