Fixing structure for arch feet of concrete-filled steel tube arch bridge

Abstract

The utility model belongs to the technical field of bridge construction, particularly relates to an arch foot fixing structure of a concrete filled steel tube arch bridge, and aims to solve the problems of poor buffering effect and high construction difficulty in the background technology, and adopts the scheme that the arch foot fixing structure comprises a base, a lower seat plate is welded on the outer wall of the top of the base, and a spherical support is rotationally connected with the inner wall of the top of the lower seat plate. The buffering structure is arranged at the bottom of the steel pipe arch foot, under the condition that the steel pipe arch foot vibrates, the spherical support can incline by a certain angle and conduct buffering through the spring, the good buffering effect is achieved, the certain anti-seismic capacity is achieved, the steel pipe arch foot is not prone to breakage under the long-time stress effect, the service life is long, and the service life of the steel pipe arch foot is prolonged. After the steel pipe arch springing is installed in the pouring sleeve through concrete pouring, the rotating base can rotate along the inner wall of the fixing base, the angle can be adjusted at will before the steel pipe arch springing is assembled, one-time positioning is not needed, the flexibility is high, and the construction difficulty is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to an arch foot fixing structure of a steel tube concrete arch bridge. Background Art

[0002] A steel tube concrete arch bridge is a bridge made of steel tubes filled with concrete. The two ends of the arch bridge are called arch feet, which bear the various forces applied by the arch bridge.

[0003] Since the arch foot on the steel tube concrete arch bridge needs to withstand various forces, its seismic resistance needs to be considered during the operation stage. According to the existing construction technology, the arch foot is constructed by a fixing method that combines the synergistic effect of anchor bolts and concrete pouring. However, this construction method not only has poor buffering effect, but also has the risk of fracture under long-term stress. In addition, the installation position of the arch foot needs to be accurately determined at the beginning of construction, which makes subsequent adjustments troublesome and the construction difficult. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a steel tube concrete arch bridge arch foot fixing structure, which overcomes the deficiencies in the prior art and effectively solves the problems of poor buffering effect and greater construction difficulty.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A steel tube concrete arch bridge arch foot fixing structure, comprising a base, a lower seat plate welded to the top outer wall of the base, a spherical support rotatably connected to the top inner wall of the lower seat plate, an upper seat plate welded to the top outer wall of the spherical support, lower supports equidistantly distributed are welded to the outer wall of the lower seat plate, and upper supports equidistantly distributed are welded to the outer wall of the upper seat plate, and a spring is connected between the lower support and the upper support;

[0007] A fixed seat is welded on the outer wall of the top of the upper seat plate, and a rotating seat is rotatably connected to the inner wall of the fixed seat. A casting sleeve is welded on the outer wall of the top of the rotating seat, and a steel pipe arch foot is installed on the inner wall of the casting sleeve.

[0008] Preferably, the outer wall of the fixed seat is provided with sliding grooves which are distributed at equal distances, and the outer wall of the rotating seat is screwed with fastening bolts which are distributed at equal distances.

[0009] Preferably, an arc groove is formed on the outer wall of the top of the lower seat plate, and the spherical support is rotatably connected to the inner wall of the arc groove.

[0010] Preferably, a handle is welded to the outer wall of one side of the casting sleeve.

[0011] Preferably, a concrete pouring hole is opened on the top outer wall of the casting sleeve.

[0012] Preferably, an anchor rod is installed on the top of the inner wall of the casting sleeve, and the anchor rod penetrates and is connected to the inner wall of the steel pipe arch foot.

[0013] The beneficial effects of the utility model are:

[0014] 1. The steel tube concrete arch bridge arch foot fixed structure of this design has a buffer structure set at the bottom of the steel tube arch foot. When the steel tube arch foot vibrates, the spherical support can be tilted at a certain angle and rely on the spring for buffering, which plays a good buffering role and has a certain earthquake resistance. It is not easy to break under long-term force and has a long service life.

[0015] 2. The steel tube concrete arch bridge arch foot fixing structure designed in this paper, when the steel tube arch foot is installed into the casting sleeve through concrete pouring, the rotating seat can rotate along the inner wall of the fixed seat. The angle can be adjusted at will before assembling the steel tube arch foot, and there is no need for one-time positioning. It has high flexibility and reduces the difficulty of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a steel tube concrete arch bridge arch foot fixing structure proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the split structure of the lower seat plate, spherical support and upper seat plate of a steel tube concrete arch bridge arch foot fixing structure proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the split structure of the fixed seat and the rotating seat of the arch foot fixing structure of a steel tube concrete arch bridge proposed by the utility model.

[0019] In the figure: 1. base; 2. lower seat plate; 3. spherical bearing; 4. upper seat plate; 5. lower support; 6. upper support; 7. spring; 8. fixed seat; 9. rotating seat; 10. casting sleeve; 11. slide groove; 12. fastening bolt; 13. steel pipe arch foot; 14. arc groove; 15. handle; 16. concrete pouring hole; 17. anchor rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Embodiment 1, refer to Figure 2A steel tube concrete arch bridge arch foot fixing structure, including a base 1, a lower seat plate 2 is welded to the top outer wall of the base 1, and a spherical support 3 is rotatably connected to the top inner wall of the lower seat plate 2, an upper seat plate 4 is welded to the top outer wall of the spherical support 3, lower supports 5 equidistantly distributed are welded to the outer wall of the lower seat plate 2, and upper supports 6 equidistantly distributed are welded to the outer wall of the upper seat plate 4, and a spring 7 is connected between the lower support 5 and the upper support 6.

[0022] In this embodiment, a buffer structure is provided at the bottom of the steel tube arch foot 13. When the steel tube arch foot 13 vibrates, the spherical support 3 can be tilted at a certain angle and rely on the spring 7 for buffering, which plays a good buffering role and has a certain shock resistance. It is not easy to break under long-term force and has a long service life.

[0023] Example 2, refer to Figure 3 A steel tube concrete arch bridge arch foot fixing structure, the top outer wall of the upper seat plate 4 is welded with a fixing seat 8, and the inner wall of the fixing seat 8 is rotatably connected with a rotating seat 9, the top outer wall of the rotating seat 9 is welded with a casting sleeve 10, and the inner wall of the casting sleeve 10 is installed with a steel tube arch foot 13.

[0024] In this embodiment, after the steel pipe arch foot 13 is installed in the casting sleeve 10 through concrete pouring, the rotating seat 9 can rotate along the inner wall of the fixed seat 8. The angle can be adjusted at will before assembling the steel pipe arch foot 13, and one-time positioning is not required. It has high flexibility and reduces the construction difficulty.

[0025] Reference Figure 1 The outer wall of the fixed seat 8 is provided with sliding grooves 11 which are distributed at equal distances, and the outer wall of the rotating seat 9 is screwed with fastening bolts 12 which are distributed at equal distances.

[0026] Reference Figure 1 The top outer wall of the lower seat plate 2 is provided with an arc groove 14 , and the spherical support 3 is rotatably connected to the inner wall of the arc groove 14 .

[0027] Reference Figure 1 A handle 15 is welded to the outer wall of one side of the casting sleeve 10.

[0028] Reference Figure 1 A concrete pouring hole 16 is opened on the top outer wall of the casting sleeve 10.

[0029] Reference Figure 1 An anchor rod 17 is installed on the top of the inner wall of the casting sleeve 10, and the anchor rod 17 penetrates and is connected to the inner wall of the steel pipe arch foot 13.

[0030] Working principle: First, the steel pipe arch foot 13 can be inserted into the casting sleeve 10, fixed by the anchor rod 17, and concrete is injected into the concrete pouring hole 16 to reinforce the steel pipe arch foot 13. At this time, the handle 15 is turned to allow the rotating seat 9 to rotate along the inner wall of the fixed seat 8, and the steel pipe arch foot 13 is adjusted to a suitable angle for assembly. When the steel pipe arch foot 13 vibrates, the spherical support 3 can be tilted at a certain angle and rely on the spring 7 for buffering to prevent the steel pipe arch foot 13 from being subjected to excessive force and breaking.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel tube concrete arch bridge arch foot fixing structure, comprising a base (1), characterized in that: A lower seat plate (2) is welded to the top outer wall of the base (1), and a spherical support (3) is rotatably connected to the top inner wall of the lower seat plate (2), an upper seat plate (4) is welded to the top outer wall of the spherical support (3), lower supports (5) distributed at equal distances are welded to the outer wall of the lower seat plate (2), and upper supports (6) distributed at equal distances are welded to the outer wall of the upper seat plate (4), and a spring (7) is connected between the lower support (5) and the upper support (6); A fixed seat (8) is welded to the top outer wall of the upper seat plate (4), and a rotating seat (9) is rotatably connected to the inner wall of the fixed seat (8). A casting sleeve (10) is welded to the top outer wall of the rotating seat (9), and a steel pipe arch foot (13) is installed on the inner wall of the casting sleeve (10).

2. The steel tube concrete arch bridge arch foot fixing structure according to claim 1, characterized in that: The outer wall of the fixed seat (8) is provided with sliding grooves (11) distributed at equal distances, and the outer wall of the rotating seat (9) is screwed with fastening bolts (12) distributed at equal distances.

3. The steel tube concrete arch bridge arch foot fixing structure according to claim 1, characterized in that: The top outer wall of the lower seat plate (2) is provided with an arc surface groove (14), and the spherical support (3) is rotatably connected to the inner wall of the arc surface groove (14).

4. The steel tube concrete arch bridge arch foot fixing structure according to claim 1, characterized in that: A handle (15) is welded to the outer wall of one side of the casting sleeve (10).

5. The steel tube concrete arch bridge arch foot fixing structure according to claim 1, characterized in that: The top outer wall of the casting sleeve (10) is provided with a concrete pouring hole (16).

6. The steel tube concrete arch bridge arch foot fixing structure according to claim 1, characterized in that: An anchor rod (17) is installed on the top of the inner wall of the casting sleeve (10), and the anchor rod (17) penetrates and is connected to the inner wall of the steel pipe arch foot (13).

Images