Steel arch frame arch foot structure of deck type reinforced concrete box type arch bridge

Abstract

The invention discloses a deck type reinforced concrete box type arch bridge steel arch frame arch foot structure which comprises a foundation, a foundation pit is formed in the foundation, a supporting assembly is fixed in the foundation pit, a plurality of sets of embedded frames are installed in the supporting assembly, cooling assemblies are connected to the outer sides of the embedded frames, and the cooling assemblies are connected to the outer sides of the embedded frames. The top end of each supporting assembly is connected with a plurality of sets of main rods. The device has the beneficial effects that by arranging the cooling assembly, when concrete is injected into the main rod, a worker uses external water supply equipment to inject water into the communicating pipe on one side through a water inlet in the cooling assembly, and circulation sleeves are connected through the communicating pipes; when the cooling water flows into the circulation sleeve, heat generated during concrete solidification can be absorbed, so that the welding position of the connecting column and the main rod is cooled, expansion caused by heating is avoided, the situation that the welding position is subjected to large stress is avoided, potential safety hazards caused by cracks are avoided, and the used cooling water is discharged through a water outlet in the other side.

Description

Technical Field

[0001] The invention relates to the technical field of top-bearing bridges, and in particular to a steel arch frame arch foot structure of a top-bearing reinforced concrete box-type arch bridge. Background Art

[0002] A top-decker bridge is a bridge whose deck is set above the main load-bearing structure of the span (trusses, arch ribs, main beams, etc.). The deck can be arranged at different positions of the span structure according to the allowable building height and actual needs. Its advantages are: the deck structure is simple and the construction is convenient. The width of the main load-bearing structure of the span can be made smaller (or densely packed), thus saving pier masonry; in addition, the view on the bridge is wide. The disadvantage is that the building height from the deck to the bottom of the beam is relatively large.

[0003] The arch foot is the supporting point on both sides of the arch bridge, which is generally built on the river bank or foundation. The arch foot bears the vertical and horizontal forces transmitted from the bridge piers, and disperses these forces to the surrounding soil or rock through the foundation or river bank. During the construction process, in order to ensure the supporting capacity of the bridge, a certain amount of concrete needs to be injected into the main pole. The heat generated by the concrete during the solidification process can easily cause the main pole to expand due to heat, which makes the welding part subject to greater stress and prone to cracks, causing safety hazards. In addition, due to the heavy weight of the main pole, the installation process is carried out by hoisting. The hoisting is greatly affected by the outside world, causing the main pole to shake, affecting the docking efficiency, thereby reducing the installation efficiency. Therefore, a steel arch frame arch foot structure of a top-supported reinforced concrete box arch bridge is urgently needed to solve the existing problems. Summary of the invention

[0004] The purpose of the present invention is to provide a steel arch frame arch foot structure of a top-supported reinforced concrete box-type arch bridge in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: A top-supported reinforced concrete box-type arch bridge steel arch frame arch foot structure, including a foundation, a foundation pit is opened on the foundation, a support assembly is fixed in the foundation pit, a plurality of groups of embedded frames are installed in the support assembly, a cooling assembly is connected to the outside of the embedded frame, and a plurality of groups of main rods are connected to the top of each group of the support assembly, a limiting assembly is arranged on the outside of the main rods, reinforcing ribs are installed between the main rods in the longitudinal direction, and a connecting frame is arranged below the reinforcing ribs, a connecting rod is installed between two groups of reinforcing ribs, and a connecting frame is installed between the two groups of the main rods located in the middle.

[0006] Furthermore, the support assembly includes a steel frame fixed in the foundation through a foundation pit, a platform is cast on the outer side of the steel frame, and a groove is opened on the platform.

[0007] By adopting the above technical solution, it is convenient to build an arch seat in the foundation pit on the foundation, and then install the main rod in the support assembly to form an arch foot to support the bridge.

[0008] Furthermore, the embedded frame includes a base frame, connecting columns, supports and supporting shafts, wherein the base frame is embedded in the platform, and the top of the base frame is located above the top of the platform.

[0009] By adopting the above technical solution, it is convenient to install the embedded frame in the support assembly, and the main rod is supported by the embedded frame.

[0010] Furthermore, two groups of connecting columns are symmetrically installed on each group of the base frames, and the connecting columns are welded to the main rods.

[0011] By adopting the above technical solution, the main rod can be connected to the base frame through the connecting column.

[0012] Furthermore, the support is located between the two groups of connecting columns, and the support shaft is fixed on the support.

[0013] By adopting the above technical solution, it is convenient for the support shaft to be installed between the two groups of connecting columns through the support.

[0014] Furthermore, the cooling assembly includes a circulation sleeve fixed on the outside of the connecting column, and the circulation sleeve is symmetrically equipped with two groups of connecting pipes.

[0015] By adopting the above technical solution, cooling water can flow through the connecting column through the circulating sleeve, so as to cool the connecting column and the main rod, and the circulating sleeves on the same base frame can be connected to each other through the connecting pipe.

[0016] Furthermore, a water inlet is installed on one group of the connecting pipes, and a water outlet is installed on the other group of the connecting pipes.

[0017] By adopting the above technical solution, it is convenient for cooling water to enter the connecting pipe through the water inlet, and the used cooling water is discharged through the drain outlet.

[0018] Furthermore, the limiting assembly includes an electric adjustment rod and a limiting plate, and the electric adjustment rod is installed on the platform.

[0019] By adopting the above technical solution, it is convenient to limit the main rod through the limiting component.

[0020] Furthermore, the limit plate is connected to the movable end of the electric adjustment rod, and one side of the limit plate is against the main rod.

[0021] By adopting the above technical solution, the electric adjustment rod can adjust the horizontal position of the limit plate, and the limit of the main rod is achieved by adjusting the horizontal position of the limit plate.

[0022] Furthermore, the connecting frame is fixedly connected to the main rod, and the connecting frame is hinged to the supporting shaft.

[0023] By adopting the above technical solution, it is convenient for the main rod to rotate along the support shaft through the connecting frame.

[0024] The specific working principle is as follows: during use, the staff uses machinery to excavate the foundation pit as needed on the foundation located on both sides, and then fixes the steel frame and the formwork in the foundation pit, and injects concrete into the formwork to form the platform, thereby forming the support assembly. When injecting concrete, the embedded frame is installed and fixed in advance. After the support assembly is cured, the main pole is hoisted to the embedded frame by external hoisting equipment. At this time, the staff makes the electric adjustment rod in the limit assembly adjust the horizontal position of the limit plate according to the installation requirements, and limits the main pole by adjusting the horizontal position of the limit plate, thereby reducing the shaking amplitude of the main pole when hoisting, facilitating the staff to quickly dock and improve the installation efficiency. The staff makes the connecting frame between the main poles and the connecting frame located at The support shaft on the support is connected, and the installation angle of the main rod is adjusted according to the installation requirements. After the adjustment is completed, the main rod is welded to the connecting column to form an arch foot to support the arch frame, and concrete is injected into the main rod as required to support the bridge. When injecting concrete into the main rod, the staff uses an external water supply device to inject water into the connecting pipe on one side through the water inlet in the cooling assembly. The circulating sleeves are connected by the connecting pipe. When the cooling water flows into the circulating sleeve, it can absorb the heat generated when the concrete solidifies, thereby achieving cooling of the connecting column and the main rod welding position, avoiding expansion due to heat, preventing the welding point from being subjected to large stress, and avoiding cracks that cause safety hazards. The used cooling water is discharged through the drain port on the other side.

[0025] The beneficial effects of the present invention are: 1. By setting up a cooling assembly, when injecting concrete into the main rod, the staff can use external water supply equipment to inject water into the connecting pipe on one side through the water inlet in the cooling assembly. The circulation sleeves are connected by the connecting pipe. When the cooling water flows into the circulation sleeve, it can absorb the heat generated when the concrete solidifies, thereby achieving cooling of the welding position of the connecting column and the main rod, avoiding expansion due to heat, preventing the welding position from being subjected to large forces, and avoiding cracks that cause safety hazards. The used cooling water is discharged through the drain port on the other side; 2. By setting up the limit assembly, when hoisting the main pole, the staff can adjust the horizontal position of the limit plate by the electric adjustment rod in the limit assembly according to the installation requirements. The main pole is limited by adjusting the horizontal position of the limit plate, thereby reducing the shaking amplitude of the main pole during hoisting, facilitating the staff to quickly dock and improve the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a steel arch frame arch foot structure of a top-bearing reinforced concrete box-type arch bridge according to the present invention; Figure 2 It is a schematic diagram of the connection relationship between the base frame, the main rod, the support shaft and the connecting frame in the arch foot structure of the steel arch frame of the top-bearing reinforced concrete box-type arch bridge described in the present invention; Figure 3 It is a schematic diagram of the positional relationship between the embedded frame and the cooling assembly in the arch foot structure of the steel arch frame of a top-bearing reinforced concrete box-type arch bridge described in the present invention; Figure 4 The invention discloses a schematic diagram of the connection relationship among the main rod, the limit assembly, the reinforcing ribs, the connecting frame, the connecting rod and the connecting frame in the arch foot structure of the steel arch frame of the top-supported reinforced concrete box-type arch bridge described in the present invention.

[0027] The following are the descriptions of the reference numerals: 1. Foundation; 2. Foundation pit; 3. Support assembly; 301. Steel bar frame; 302. Platform; 303. Groove; 4. Embedded frame; 401. Base frame; 402. Connecting column; 403. Support; 404. Support shaft; 5. Cooling assembly; 501. Circulation sleeve; 502. Connecting pipe; 503. Water inlet; 504. Drain; 6. Main rod; 7. Limit assembly; 701. Electric adjustment rod; 702. Limit plate; 8. Reinforcement ribs; 9. Connecting frame; 10. Connecting rod; 11. Connecting frame. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1-Figure 4As shown, a steel arch foot structure of an upper-supported reinforced concrete box-type arch bridge includes a foundation 1, a foundation pit 2 is opened on the foundation 1, a support assembly 3 is fixed in the foundation pit 2, a plurality of groups of embedded frames 4 are installed in the support assembly 3, the embedded frames 4 are used to connect the main rods 6, a cooling assembly 5 is connected to the outside of the embedded frames 4, and a plurality of groups of main rods 6 are connected to the top of each group of the support assemblies 3, a limiting assembly 7 is arranged on the outside of the main rods 6, reinforcing ribs 8 are installed between the main rods 6 in the longitudinal direction, the reinforcing ribs 8 are used to connect adjacent main rods 6, and a connecting frame 9 is arranged below the reinforcing ribs 8, the connecting frame 9 can be connected to the support shaft 404, a connecting rod 10 is installed between the two groups of reinforcing ribs 8, the connecting rod 10 can connect adjacent reinforcing ribs 8, and a connecting frame 11 is installed between the two groups of the main rods 6 located in the middle, and the connecting frame 11 can connect the four groups of the main rods 6 located in the middle.

[0029] In this embodiment, the support assembly 3 includes a steel frame 301 fixed in the foundation 1 through the foundation pit 2, a platform 302 is cast on the outside of the steel frame 301, and a groove 303 is opened on the platform 302 to facilitate the construction of an arch seat in the foundation pit 2 on the foundation 1, and then the main rod 6 is installed in the support assembly 3 to form an arch foot to support the bridge.

[0030] In this embodiment, the embedded frame 4 includes a base frame 401, a connecting column 402, a support 403 and a support shaft 404, wherein the base frame 401 is embedded in the platform 302, and the top of the base frame 401 is located above the top of the platform 302, so that the embedded frame 4 can be easily installed in the support assembly 3, and the main rod 6 is supported by the embedded frame 4.

[0031] In this embodiment, two groups of connecting columns 402 are symmetrically installed on each group of the base frames 401 , and the connecting columns 402 are welded to the main rods 6 , so that the main rods 6 can be connected to the base frames 401 through the connecting columns 402 .

[0032] In this embodiment, the support 403 is located between the two groups of connecting columns 402 , and the support shaft 404 is fixed on the support 403 , so that the support shaft 404 can be conveniently installed between the two groups of connecting columns 402 through the support 403 .

[0033] In this embodiment, the cooling assembly 5 includes a circulation sleeve 501 fixed on the outside of the connecting column 402, and the circulation sleeve 501 is symmetrically equipped with two groups of connecting pipes 502, so that cooling water can flow through the connecting column 402 through the circulation sleeve 501, thereby cooling the connecting column 402 and the main rod 6, and the circulation sleeves 501 on the same base frame 401 can be interconnected through the connecting pipe 502.

[0034] In this embodiment, one group of the connecting tubes 502 is equipped with a water inlet 503, and the other group of the connecting tubes 502 is equipped with a drain port 504, so that cooling water can enter the connecting tubes 502 through the water inlet 503, and the used cooling water can be discharged through the drain port 504.

[0035] In this embodiment, the limiting assembly 7 includes an electric adjustment rod 701 and a limiting plate 702 . The electric adjustment rod 701 is installed on the platform 302 , so as to facilitate limiting the main rod 6 through the limiting assembly 7 .

[0036] In this embodiment, the limit plate 702 is connected to the movable end of the electric adjustment rod 701, and one side of the limit plate 702 is against the main rod 6, so that the electric adjustment rod 701 can adjust the horizontal position of the limit plate 702, and the main rod 6 is limited by adjusting the horizontal position of the limit plate 702.

[0037] In this embodiment, the connecting frame 9 is fixedly connected to the main rod 6 , and the connecting frame 9 is hinged to the support shaft 404 , so that the main rod 6 can be rotated along the support shaft 404 through the connecting frame 9 .

[0038] The specific working principle is as follows: the staff uses machinery to dig the foundation pit 2 on the foundation 1 located on both sides as needed, and then fixes the steel frame 301 and the formwork in the foundation pit 2, and injects concrete into the formwork to form the platform 302, thereby forming the support assembly 3. When injecting concrete, the embedded frame 4 is installed and fixed in advance. After the support assembly 3 is cured, the main pole 6 is hoisted to the embedded frame 4 through external hoisting equipment. At this time, the staff adjusts the horizontal position of the limit plate 702 by the electric adjustment rod 701 in the limit assembly 7 according to the installation requirements, and limits the main pole 6 by adjusting the horizontal position of the limit plate 702, thereby reducing the shaking amplitude of the main pole 6 when hoisting, facilitating the staff to quickly dock and improve the installation efficiency. The staff makes the connecting frame 9 located between the main poles 6 and the support 40 3 is connected to the support shaft 404 on the main rod 6, and the installation angle of the main rod 6 is adjusted according to the installation requirements. After the adjustment is completed, the main rod 6 is welded to the connecting column 402 to form an arch foot to support the arch frame, and concrete is injected into the main rod 6 as required to support the bridge. When injecting concrete into the main rod 6, the staff uses an external water supply device to inject water into the connecting pipe 502 on one side through the water inlet 503 in the cooling assembly 5. The circulation sleeves 501 are connected by the connecting pipe 502. When the cooling water flows into the circulation sleeve 501, it can absorb the heat generated when the concrete solidifies, thereby achieving cooling of the connecting column 402 and the main rod 6 welding position, avoiding expansion due to heat, preventing the welding position from being subjected to large stress, and avoiding cracks to cause safety hazards. The used cooling water is discharged through the drain port 504 on the other side.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A steel arch frame arch foot structure of a top-bearing reinforced concrete box-type arch bridge, characterized in that: The invention comprises a foundation (1), wherein a foundation pit (2) is opened on the foundation (1), a support assembly (3) is fixed in the foundation pit (2), a plurality of embedded frames (4) are installed in the support assembly (3), a cooling assembly (5) is connected to the outside of the embedded frames (4), and a plurality of main rods (6) are connected to the top of each group of the support assembly (3), a limiting assembly (7) is arranged on the outside of the main rods (6), reinforcing ribs (8) are arranged between the main rods (6) in the longitudinal direction, and a connecting frame (9) is arranged below the reinforcing ribs (8), a connecting rod (10) is installed between two groups of reinforcing ribs (8), and a connecting frame (11) is installed between two groups of the main rods (6) located in the middle.

2. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 1, characterized in that: The support assembly (3) comprises a steel frame (301) fixed in the foundation (1) through a foundation pit (2), a platform (302) is cast outside the steel frame (301), and a groove (303) is provided on the platform (302).

3. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 2, characterized in that: The embedded frame (4) comprises a base frame (401), a connecting column (402), a support (403) and a support shaft (404), wherein the base frame (401) is embedded in the platform (302), and the top end of the base frame (401) is located above the top end of the platform (302).

4. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 3, characterized in that: Two groups of connecting columns (402) are symmetrically mounted on each group of the base frames (401), and the connecting columns (402) are welded to the main rods (6).

5. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 4, characterized in that: The support (403) is located between the two groups of connecting columns (402), and the support shaft (404) is fixed on the support (403).

6. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 1, characterized in that: The cooling assembly (5) comprises a circulation sleeve (501) fixed on the outside of the connecting column (402), and the circulation sleeve (501) is symmetrically mounted with two groups of connecting pipes (502).

7. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 6, characterized in that: One group of the connecting pipes (502) is provided with a water inlet (503), and the other group of the connecting pipes (502) is provided with a water outlet (504).

8. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 2, characterized in that: The limiting assembly (7) comprises an electric adjustment rod (701) and a limiting plate (702), and the electric adjustment rod (701) is mounted on the platform (302).

9. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 8, characterized in that: The limit plate (702) is connected to the movable end of the electric adjustment rod (701), and one side of the limit plate (702) abuts against the main rod (6).

10. The steel arch frame arch foot structure of a deck reinforced concrete box arch bridge according to claim 3, characterized in that: The connecting frame (9) is fixedly connected to the main rod (6), and the connecting frame (9) is hinged to the support shaft (404).

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