Bridge special-shaped steel structure main tower mounting structure and construction method

Abstract

The invention discloses a bridge special-shaped steel structure main tower mounting structure and a construction method.The bridge special-shaped steel structure main tower mounting structure comprises a foundation structure, a lower structure, a middle structure and a top structure which are sequentially connected from bottom to top, and a first supporting frame is arranged between the foundation structure and the lower structure; a second supporting frame is arranged between the lower structure and the middle structure, and a first inhaul cable and a second inhaul cable are arranged between the foundation structure and the top structure. According to the bridge special-shaped steel structure main tower mounting structure, the lower structure and the middle structure are supported through the first supporting frame and the second supporting frame correspondingly, then the top structure is pulled through the first inhaul cable and the second inhaul cable, then the first supporting frame and the second supporting frame are matched, and the overall stability of the main tower is improved.

Description

Technical Field

[0001] The present application relates to the technical field of suspension bridge construction, and in particular to an installation structure and a construction method for a special-shaped steel structure main tower of a bridge. Background Art

[0002] During the construction of modern bridges, in order to reflect the uniqueness of the bridge or fit in with the local culture, the main tower structure is generally designed into a special shape, also known as a special shape. This makes the conventional installation structure unable to adapt, so a new main tower installation structure is urgently needed. Summary of the invention

[0003] The purpose of this application is to provide a special-shaped steel structure main tower installation structure and construction method for a bridge, so as to improve the problem that the high-altitude construction of the tie beam is relatively troublesome and has high safety hazards.

[0004] The present application provides a special-shaped steel structure main tower installation structure and construction method for a bridge, which adopts the following technical solutions: A special-shaped steel structure main tower installation structure for a bridge comprises a basic structure, a lower structure, a middle structure and a top structure which are sequentially connected from bottom to top, a first support frame is arranged between the basic structure and the lower structure, a second support frame is arranged between the lower structure and the middle structure, and a first cable and a second cable are arranged between the basic structure and the top structure.

[0005] By adopting the above technical solution, the lower structure and the middle structure are supported by the first support frame and the second support frame respectively, and then the top structure is pulled by the first cable and the second cable, and then cooperates with the first support frame and the second support frame to improve the overall stability of the main tower.

[0006] Optionally, the middle structure includes a first supporting part, a second supporting part, a third supporting part, a fourth supporting part and a fifth supporting part, the bottom of the first supporting part is connected to the lower structure, the top of the first supporting part is connected to the second supporting part and the third supporting part at the same time, the top of the second supporting part is connected to the fourth supporting part, and the top of the third supporting part is connected to the fifth supporting part.

[0007] Optionally, a twisting mechanism is provided between the first supporting part and the second supporting part, and between the first supporting part and the third supporting part.

[0008] Through the above technical solution, a hinge mechanism is set between the first support part and the second support part, and between the first support part and the third support part, which can realize the connection between the first support part and the second support part, and between the first support part and the third support part, and at the same time allow the second support part and the third support part to rotate a certain angle relative to the first support part, thereby facilitating the adjustment of the position in subsequent construction and improving the overall installation accuracy.

[0009] Optionally, one end of the fourth support portion away from the second support portion is inclined toward a direction away from the fifth support portion, and one end of the fifth support portion away from the third support portion is inclined toward a direction away from the fourth support portion, and positioning brackets are provided between the second support portion and the fourth support portion and between the third support portion and the fifth support portion.

[0010] Through the above technical solution, since the fourth support part and the fifth support part are both inclined, they are prone to sag and break. By setting the positioning corbels, the fourth support part and the fifth support part can be further strengthened to avoid the possibility of breakage of the fourth support part and the fifth support part.

[0011] Furthermore, a pulling device is provided between the fourth supporting portion and the fifth supporting portion.

[0012] Through the above technical solution, the fourth support part and the fifth support part can be further strengthened by the pulling device, thereby reducing the possibility of breakage of the two.

[0013] Optionally, the top structure includes a first folding portion and a second folding portion connected to each other, the first folding portion is connected to the fourth supporting portion, and the second folding portion is connected to the fifth supporting portion.

[0014] Optionally, a supporting device is provided between the first closing part and the second closing part.

[0015] By adopting the above technical solution and setting the supporting device, the positions of the first closing part and the second closing part can be controlled, thereby improving the overall assembly accuracy.

[0016] Optionally, two first cables are provided, and the two first cables are respectively connected to the ends of the first closing part and the second closing part which are opposite to each other.

[0017] Optionally, two second cables are provided, and the two second cables are respectively connected to the opposite ends of the first closing part and the second closing part.

[0018] Through the above technical solution, the overall stability of the main tower can be controlled through the cooperation of the first cable and the second cable.

[0019] A construction method thereof, a construction method, based on the above-mentioned special-shaped steel structure main tower installation structure of the bridge, comprises the following steps: S1. Construction foundation structure; S2, hoisting the lower structure, installing the lower structure on the foundation structure, and installing the first support frame; S3, installing the middle structure, hoisting the middle structure, connecting the middle structure with the lower structure, and installing the second support frame and the tensioning device at the same time; S4. Hoist the top structure and connect the top structure with the middle structure, and install the first cable and the second cable at the same time.

[0020] By adopting the above technical solution, the middle structure is first installed on the ground, and then hoisted and connected with the lower structure, which can greatly improve the construction efficiency. At the same time, the second support frame and the pulling device are used to greatly improve the stability and reliability.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The lower structure and the middle structure are supported by the first support frame and the second support frame respectively, and then the top structure is pulled by the first cable and the second cable, and then cooperates with the first support frame and the second support frame to improve the overall stability of the main tower; 2. Since the fourth support part and the fifth support part are both inclined, they are prone to drooping and breaking. By setting the positioning bracket, the fourth support part and the fifth support part can be further strengthened to avoid the possibility of breaking of the fourth support part and the fifth support part; 3. By setting the supporting device, the positions of the first closing part and the second closing part can be controlled, thereby improving the overall assembly accuracy; 4. First install the middle structure on the ground, then hoist it and connect it with the lower structure, which can greatly improve the construction efficiency. At the same time, the second support frame and the pulling device can greatly improve the stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an overall installation structure of a special-shaped steel structure main tower of a bridge in the present invention.

[0023] Figure 2 It is a schematic diagram of the middle structure and the top structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the body positioning bracket in the middle structure position of the present invention.

[0025] Figure 4 It is a schematic diagram of the positioning bracket in the present invention.

[0026] Figure 5 Schematic diagram of the pulling device in the present invention.

[0027] Figure 6 2 is a schematic diagram of a supporting device according to the present invention.

[0028] Figure 7 Schematic diagram of the cable anchor point in the present invention.

[0029] In the figure, 1. basic structure; 11. first supporting frame; 2. lower structure; 21. second supporting frame; 3. middle structure; 31. first supporting part; 32. second supporting part; 33. third supporting part; 34. fourth supporting part; 35. fifth supporting part; 36. twisting mechanism; 37. positioning bracket; 38. pulling device; 381. ear seat; 382. anchor box; 383. anchor; 384. tensioning jack; 385. steel strand; 4. top structure; 41. first closing part; 42. second closing part; 43. supporting device; 431. supporting seat; 432. supporting jack; 433. intermediate fixing frame; 44. first cable; 45. second cable; 46. cable anchor point. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1 A special-shaped steel structure main tower installation structure for bridges, referring to Figures 1 to 7, including a basic structure 1, a lower structure 2, a middle structure 3 and a top structure 4 connected in sequence from bottom to top, a first support frame 11 is provided between the basic structure 1 and the lower structure 2, a second support frame 21 is provided between the lower structure 2 and the middle structure 3, and a first cable 44 and a second cable 45 are provided between the basic structure 1 and the top structure 4. The lower structure 2 and the middle structure 3 are supported by the first support frame 11 and the second support frame 21 respectively, and then the top structure 4 is pulled by the first cable 44 and the second cable 45, and then cooperates with the first support frame 11 and the second support frame 21 to improve the overall stability of the main tower.

[0033] Specifically, the middle structure 3 includes a first support part 31, a second support part 32, a third support part 33, a fourth support part 34 and a fifth support part 35. The bottom of the first support part 31 is welded to the lower structure 2, the top of the first support part 31 is welded to the second support part 32 and the third support part 33 at the same time, the top of the second support part 32 is welded to the fourth support part 34, and the top of the third support part 33 is welded to the fifth support part 35.

[0034] Optionally, a twist mechanism 36 is provided between the first support portion 31 and the second support portion 32, and between the first support portion 31 and the third support portion 33. The twist mechanism 36 is provided between the first support portion 31 and the second support portion 32, and between the first support portion 31 and the third support portion 33, so as to realize the connection between the first support portion 31 and the second support portion 32, and between the first support portion 31 and the third support portion 33, and at the same time, the second support portion 32 and the third support portion 33 can be rotated at a certain angle relative to the first support portion 31, so as to facilitate fine-tuning of the angle in subsequent construction and improve the overall installation accuracy.

[0035] The end of the fourth support portion 34 away from the second support portion 32 is inclined toward the direction away from the fifth support portion 35, and the end of the fifth support portion 35 away from the third support portion 33 is inclined toward the direction away from the fourth support portion 34. Positioning brackets 37 are welded between the second support portion 32 and the fourth support portion 34, and between the third support portion 33 and the fifth support portion 35. Since the fourth support portion 34 and the fifth support portion 35 are both inclined, they are prone to drooping and breaking. By setting the positioning brackets 37, the fourth support portion 34 and the fifth support portion 35 can be further strengthened to avoid the possibility of breaking of the fourth support portion 34 and the fifth support portion 35. Multiple groups of positioning brackets 37 can be provided.

[0036] More specifically, a tensioning device 38 is provided between the fourth support portion 34 and the fifth support portion 35. The tensioning device 38 includes two ear seats 381, which are fixedly connected to the fourth support portion 34 and the fifth support portion 35, respectively. An anchor box 382 is fixedly connected to each ear seat 381, and an anchor 383 and a tensioning jack 384 are fixedly connected inside the anchor box 382. A steel strand 385 is provided between the two ear seats 381, and both ends of the steel strand 385 are respectively connected to the two tensioning jacks 384. At the same time, the steel strand 385 also passes through the two anchors 383, and the anchor 383 prevents the steel strand 385 from loosening after the tensioning jack 384 is tensioned. Through the tensioning device 38, the fourth support portion 34 and the fifth support portion 35 can be further strengthened to reduce the possibility of the two being broken. The tensioning device 38 can also adjust the downward deflection caused by the deadweight when the main tower is installed.

[0037] Specifically, the top structure 4 includes a first closing portion 41 and a second closing portion 42 which are welded to each other. The first closing portion 41 is welded to the fourth supporting portion 34 , and the second closing portion 42 is welded to the fifth supporting portion 35 .

[0038] In addition, a support device 43 is provided between the first closing part 41 and the second closing part 42. By setting the support device 43, the positions of the first closing part 41 and the second closing part 42 can be controlled, thereby improving the overall assembly accuracy. The symmetrical device includes two support seats 431, two groups of support jacks 432 and an intermediate fixed frame 433. The two support seats 431 are fixedly connected to the first closing part 41 and the second closing part 42 respectively, and the two groups of support jacks 432 are fixedly installed at both ends of the intermediate fixed frame 433 respectively. The movable ends of the two groups of support jacks 432 are fixedly connected to the two support seats 431 respectively, thereby achieving support for the first closing part 41 and the second closing part 42.

[0039] There are two first cables 44, and the two first cables 44 are connected to the ends opposite to the first closing part 41 and the second closing part 42 respectively. There are two second cables 45, and the two second cables 45 are connected to the ends opposite to the first closing part 41 and the second closing part 42 respectively. Through the cooperation of the first cable 44 and the second cable 45, the stability of the main tower as a whole can be controlled, and the angle of the main tower as a whole can be adjusted to a certain extent, thereby improving the construction accuracy. The first cable 44 and the second cable 45 are connected to the foundation structure 1 through the cable anchor point 46.

[0040] Working principle: The lower structure 2 and the middle structure 3 are supported by the first support frame 11 and the second support frame 21 respectively, and then the top structure 4 is pulled by the first cable 44 and the second cable 45, and then cooperates with the first support frame 11 and the second support frame 21 to improve the overall stability of the main tower.

[0041] Since the fourth support portion 34 and the fifth support portion 35 are both inclined, they are prone to sagging and breaking. By setting the positioning bracket 37, the fourth support portion 34 and the fifth support portion 35 can be further strengthened to avoid the possibility of breaking the fourth support portion 34 and the fifth support portion 35. By setting the supporting device 43, the positions of the first closing portion 41 and the second closing portion 42 can be controlled, thereby improving the overall assembly accuracy.

[0042] Firstly installing the middle structure 3 on the ground and then hoisting and connecting it with the lower structure 2 can greatly improve the construction efficiency. At the same time, using the second support frame 21 and the pulling device 38 can greatly improve the stability and reliability.

[0043] A construction method thereof, based on the above-mentioned special-shaped steel structure main tower installation structure of the bridge, comprises the following steps: S1. Construction foundation structure 1.

[0044] S2, hoisting the lower structure 2, and installing the lower structure 2 on the foundation structure 1, and installing the first supporting frame 11 between the lower structure 2 and the foundation structure 1.

[0045] S3, install the middle structure 3 on the ground, install the twisting structure between the first support part 31 and the second support part 32, between the first support part 31 and the third support part 33, and install the positioning bracket 37 between the second support part 32 and the fourth support part 34, and between the third support part 33 and the fifth support part 35. Then hoist the middle structure 3, connect the middle structure 3 with the lower structure 2, and install the second support frame 21 between the middle structure 3 and the lower structure 2. The second support frame 21 can be a steel pipe support frame. Then install the tensioning device 38 between the fourth support part 34 and the fifth support part 35.

[0046] S4, first weld the first closing part 41 and the second closing part 42, and install the supporting device 43, then hoist the top structure 4, and weld the top structure 4 and the middle structure 3, and install the first cable 44 and the second cable 45 at the same time.

[0047] First install the middle structure 3 and the top structure 4 on the ground, and then hoist and connect them, which can greatly improve the construction efficiency. This application uses the first support frame 11 and the second support frame 21 to strengthen the basic support, and then further strengthens the middle structure 3 through the twisting mechanism 36 and the positioning bracket 37, and then further strengthens the middle structure 3 through the tensioning device 38, and adjusts the deflection caused by the weight of the main tower, while the support device 43 and the first cable 44 can relieve the pressure caused by the second cable 45 and the tensioning device 38 on the first closing section and the second closing section, avoiding the possibility of deformation, that is, the support device 43 and the tensioning device 38 form an internal balance, and the first cable 44 and the second cable 45 form an external balance.

[0048] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A special-shaped steel structure main tower installation structure for a bridge, comprising a base structure (1), a lower structure (2), a middle structure (3) and a top structure (4) connected in sequence from bottom to top, characterized in that: A first support frame (11) is provided between the base structure (1) and the lower structure (2), a second support frame (21) is provided between the lower structure (2) and the middle structure (3), and a first cable (44) and a second cable (45) are provided between the base structure (1) and the top structure (4).

2. The special-shaped steel structure main tower installation structure of a bridge according to claim 1, characterized in that: The middle structure (3) comprises a first supporting part (31), a second supporting part (32), a third supporting part (33), a fourth supporting part (34) and a fifth supporting part (35); the bottom of the first supporting part (31) is connected to the lower structure (2); the top of the first supporting part (31) is connected to both the second supporting part (32) and the third supporting part (33); the top of the second supporting part (32) is connected to the fourth supporting part (34); and the top of the third supporting part (33) is connected to the fifth supporting part (35).

3. The special-shaped steel structure main tower installation structure of a bridge according to claim 2, characterized in that: A twisting mechanism (36) is provided between the first supporting part (31) and the second supporting part (32), and between the first supporting part (31) and the third supporting part (33).

4. The special-shaped steel structure main tower installation structure of a bridge according to claim 3 is characterized by: One end of the fourth support portion (34) away from the second support portion (32) is inclined toward a direction away from the fifth support portion (35), and one end of the fifth support portion (35) away from the third support portion (33) is inclined toward a direction away from the fourth support portion (34). Positioning brackets (37) are provided between the second support portion (32) and the fourth support portion (34) and between the third support portion (33) and the fifth support portion (35).

5. The special-shaped steel structure main tower installation structure of a bridge according to claim 4, characterized in that: A pulling device (38) is provided between the fourth supporting portion (34) and the fifth supporting portion (35).

6. The special-shaped steel structure main tower installation structure of a bridge according to claim 5, characterized in that: The top structure (4) comprises a first folding portion (41) and a second folding portion (42) which are connected to each other, wherein the first folding portion (41) is connected to the fourth supporting portion (34), and the second folding portion (42) is connected to the fifth supporting portion (35).

7. The special-shaped steel structure main tower installation structure of a bridge according to claim 6, characterized in that: A supporting device (43) is provided between the first closing portion (41) and the second closing portion (42).

8. The special-shaped steel structure main tower installation structure of a bridge according to claim 7, characterized in that: Two first cables (44) are provided, and the two first cables (44) are respectively connected to the ends of the first closing portion (41) and the second closing portion (42) which are opposite to each other.

9. The special-shaped steel structure main tower installation structure of a bridge according to claim 8, characterized in that: Two second cables (45) are provided, and the two second cables (45) are respectively connected to opposite ends of the first closing portion (41) and the second closing portion (42).

10. A construction method, based on the special-shaped steel structure main tower installation structure of bridge according to claim 9, characterized in that: The steps include: S1. Construction foundation structure (1); S2, hanging the lower structure (2), installing the lower structure (2) on the foundation structure (1), and installing the first support frame (11); S3, installing the middle structure (3), hoisting the middle structure (3), and connecting the middle structure (3) with the lower structure (2), and installing the second support frame (21) and the tensioning device (38); S4, hoisting the top structure (4), connecting the top structure (4) with the middle structure (3), and installing the first cable (44) and the second cable (45) at the same time.

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