A triangular structural system for steel arch bridge rotation construction and its installation method

Abstract

The present invention relates to a triangular structure system for the construction of a steel arch bridge rotation and an installation method thereof, wherein the triangular structure system comprises a compression rod and a tension rod that are hinged to each other, one end of the compression rod is also connected to the bridge deck beam through a rear cable, the other end of the compression rod is hinged to one end of the steel arch, and the other end of the steel arch is hinged to the end of the tension rod that is not hinged to the compression rod. When installing the triangular structure system, a through-core oil cylinder installed on the rear cable and a door-shaped bracket that can be lifted and moved for placing the tension rod are used. The through-core oil cylinder contracts and pulls the rear cable, so that the compression rod rotates upward, the tension rod is lifted, and the door-shaped bracket moves and lifts accordingly. When the door-shaped bracket moves to the position of the steel arch corresponding to the connection tension rod, the tension rod is removed from the door-shaped bracket and then hinged to the steel arch. Compared with the prior art, when installing a large tripod system, the present invention no longer needs to use large-scale lifting equipment, and high-altitude operations are converted to ground operations, which can reduce construction risks, shorten construction periods, and reduce construction costs.

Description

Technical Field

[0001] The invention relates to the technical field of steel arch bridge construction, and in particular to a triangular structure system for steel arch bridge rotation construction and an installation method thereof. Background Art

[0002] In recent years, the overall vertical rotation method is often used in the construction of steel arches of steel arch bridges, among which the tripod construction method is more common. The tripod construction method has a fast construction speed, good economic benefits, can ensure construction quality, and can reduce the use of large construction cranes and full-height scaffolding.

[0003] However, as the steel arch becomes larger and taller, the tripod system used for construction assistance also becomes larger and taller. Therefore, the installation and removal of the tripod itself has also become a difficult problem in the construction of steel arch bridges. At present, the installation and removal of the large tripod system can only be completed with the help of large-scale lifting equipment, which is a high-altitude operation. It not only increases the construction cost and prolongs the construction period, but also has certain construction risks. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a triangular structure system and installation method for steel arch bridge rotation construction, so as to reduce construction risks, reduce construction costs and shorten construction period.

[0005] The objective of the present invention can be achieved through the following technical scheme: a triangular structural system for the rotation construction of a steel arch bridge, comprising a compression rod and a tension rod hinged to each other, wherein one end of the compression rod hinged to the tension rod is also connected to the bridge deck beam through a rear cable, and the other end of the compression rod is hinged to one end of the steel arch, and the other end of the steel arch is hinged to the end of the tension rod that is not hinged to the compression rod.

[0006] Furthermore, a first arch rib hinge and a second arch rib hinge are respectively provided at both ends of the steel arch, the first arch rib hinge is hinged to the compression rod, and the second arch rib hinge is hinged to the tension rod.

[0007] Furthermore, a first compression rod hinge is provided at one end of the compression rod, and the first compression rod hinge is connected to the first arch rib hinge.

[0008] Furthermore, a second pressure rod hinge and a third pressure rod hinge are respectively provided on both sides of one end of the pressure rod, the second pressure rod hinge is connected to the rear cable, and the third pressure rod hinge is connected to the pull rod.

[0009] Furthermore, a first pull rod hinge and a second pull rod hinge are respectively provided at both ends of the pull rod, the first pull rod hinge is connected to the third pressure rod hinge, and the second pull rod hinge is connected to the second arch rib hinge.

[0010] Furthermore, a plurality of tire frames for supporting the steel arch are provided on the bridge deck beam.

[0011] Furthermore, one end of the steel arch connected to the compression rod is also connected to an arch foot.

[0012] Furthermore, the steel arch is connected to the arch foot via a bottom hinge.

[0013] Furthermore, the first arch rib hinge and the second arch rib hinge are respectively welded to two ends of the steel arch.

[0014] Furthermore, a core-penetrating oil cylinder is installed on the rear cable.

[0015] A method for installing a triangular structural system for steel arch bridge rotation construction comprises the following steps:

[0016] S1. Complete the splicing of the steel arch and the arch foot on the bridge deck beam;

[0017] S2, hinge one end of the steel arch with one end of the compression rod, and connect the other end of the compression rod to the rear cable and hinge with one end of the tension rod;

[0018] S3. Install a core-penetrating cylinder on the rear cable and connect the other end of the rear cable to the bridge deck beam;

[0019] S4, placing the other end of the pull rod on a movable and liftable door-shaped bracket, wherein the door-shaped bracket spans the steel arch;

[0020] S5. Contract the core-penetrating cylinder to pull the rear cable, the compression rod rotates upward, the pull rod is lifted, and the gate-shaped bracket moves and lifts accordingly. When the gate-shaped bracket moves to the position corresponding to the connection rod on the steel arch, the pull rod is removed from the gate-shaped bracket and hinged to the steel arch, thus completing the installation of the triangular structure system.

[0021] Compared with the prior art, the present invention hinges a compression rod and a tension rod at both ends of the steel arch respectively, and hinges the compression rod and the tension rod to each other to form a flexible and changeable triangular structural system, utilizes the rear cable connected to the bridge deck beam to pull the compression rod to rotate, and combines with the movable and liftable door-shaped bracket to move the tension rod to the corresponding position on the steel arch to complete the hinge connection of the tension rod and the steel arch. The present invention operates directly on the ground and can reliably complete the installation and dismantling of the tripod. Since high-altitude operations are avoided, the construction risk is reduced. In addition, the present invention no longer requires the use of large-scale lifting equipment, thereby reducing construction costs and shortening construction periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the forming state of the triangular structural system of the present invention;

[0023] Figure 2 is a schematic diagram of the structure of the compression rod;

[0024] Figure 3 is a schematic diagram of the structure of the pull rod;

[0025] Figure 4 This is a schematic diagram of the splicing effect of the steel arch and the arch foot;

[0026] Figure 5 It is a schematic diagram of the side structure of a movable and lifting door-shaped bracket;

[0027] Figure 6 It is a schematic diagram of the main structure of a movable and lifting door-shaped bracket;

[0028] Figure 7 It is a schematic diagram of the first installation state of the triangular structural system;

[0029] Figure 8 is a schematic diagram of a second installation state of the triangular structural system;

[0030] Fig. 9 It is a schematic diagram of the third installation state of the triangular structural system;

[0031] Explanation of marks in the figure: 1. steel arch; 2. arch foot; 3. pressure rod; 4. tension rod; 5. rear cable; 6. tire frame; 7. bridge deck beam; 8. bottom hinge; 9. first pressure rod hinge; 10. first arch rib hinge; 11. second arch rib hinge; 12. first tension rod hinge; 13. second tension rod hinge; 14. second pressure rod hinge; 15. third pressure rod hinge; 16. through-core cylinder; 17. gate bracket; 18. roller; 19. cylinder body; 20. cylinder piston; 21. shelf beam. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example

[0034] like Figure 1 As shown, a triangular structural system for the rotation construction of a steel arch bridge includes a compression rod 3 and a tension rod 4 hinged to each other, one end of the compression rod 3 hinged to the tension rod 4 is also connected to the bridge deck beam 7 through a rear cable 5, and a through-core cylinder 16 is installed on the rear cable 5, the other end of the compression rod 3 is hinged to one end of the steel arch 1, and the other end of the steel arch 1 is hinged to the end of the tension rod 4 that is not hinged to the compression rod 3.

[0035] Specifically, the two ends of the steel arch 1 are respectively provided with a first arch rib hinge 10 and a second arch rib hinge 11, and the first arch rib hinge 10 and the second arch rib hinge 11 are respectively welded to the two ends of the steel arch 1. The first arch rib hinge 10 is hinged to the compression rod 3, and the second arch rib hinge 11 is hinged to the tension rod 4. Figure 2As shown, a first compression rod hinge 9 is provided at one end of the compression rod 3, and the first compression rod hinge 9 is connected to the first arch rib hinge 10, and a second compression rod hinge 14 and a third compression rod hinge 15 are respectively provided on both sides of the other end of the compression rod 3, the second compression rod hinge 14 is connected to the rear cable 5, and the third compression rod hinge 15 is connected to the pull rod 4;

[0036] like Figure 3 As shown, a first pull rod hinge 12 and a second pull rod hinge 13 are respectively provided at both ends of the pull rod 4 . The first pull rod hinge 12 is connected to the third compression rod hinge 15 , and the second pull rod hinge 13 is connected to the second arch rib hinge 11 .

[0037] In addition, a plurality of tire frames 6 for supporting the steel arch 1 are provided on the bridge deck beam 7. The end of the steel arch 1 connected to the compression rod 3 is also connected to the arch foot 2. The steel arch 2 is connected to the arch foot 2 through a bottom hinge 8. Figure 4 The figure shows a schematic diagram of the structure after the steel arch 1 and the arch foot 2 are assembled. The steel arch 1 and the arch foot 2 are two parts divided during the construction stage of the steel arch bridge. During the construction process, the steel arch 1 is rotated around the bottom hinge 8 until it is in place. The bottom hinge 8, the first arch rib hinge 10, and the second arch rib hinge 11 are all hinges welded to the steel arch 1 for the rotation construction.

[0038] In practical application, the method for installing the above triangular structural system includes the following steps:

[0039] S1, completing the splicing of the steel arch 1 and the arch foot 2 on the bridge deck beam 7;

[0040] S2, hinge one end of the steel arch 1 with one end of the compression rod 3, and connect the other end of the compression rod 3 with the rear cable 5 and hinge with one end of the tension rod 4;

[0041] S3, installing the core-penetrating cylinder 16 on the rear cable 5, and connecting the other end of the rear cable 5 to the bridge deck beam 7;

[0042] S4, placing the other end of the pull rod 4 on a movable and liftable door-shaped bracket 17, wherein the door-shaped bracket 17 spans over the steel arch 1, and the specific structure of the door-shaped bracket 17 is as follows: Figure 5 and Figure 6 As shown, the two ends of the gate-shaped bracket 17 are symmetrically provided with mobile lifting devices, and the tops of the two mobile lifting devices are connected by a shelf beam 21, and the shelf beam 21 is used to place one end of the pull rod 4, and the mobile lifting device includes a cylinder body 19, and a cylinder piston 20 is arranged in the cylinder body 19, and a roller 18 is installed at the bottom of the cylinder body 19, and the cylinder piston 20 is connected to the shelf beam 21;

[0043] S5, such as Figure 7 to Figure 9As shown, the through-core cylinder 16 is retracted to pull the rear cable 5, the compression rod 3 rotates upward (the compression rod 3 begins to rotate around the hinge formed by the first compression rod hinge 9 and the first arch rib hinge 10), the pull rod 4 is lifted, and the gate-shaped bracket 17 moves and rises accordingly. When the gate-shaped bracket 17 moves to the position on the steel arch 1 corresponding to the connection position of the pull rod 4, the gate-shaped bracket 17 is raised, the pull rod 4 is removed from the gate-shaped bracket 17, and the second pull rod hinge 13 is hinged to the second arch rib hinge 11 of the steel arch 1, thereby completing the installation of the triangular structure system.

[0044] In summary, the present invention transforms high-altitude installation operations into ground operations, and can effectively and reliably install and dismantle the tripod structure system without the need for large-scale lifting equipment, thereby achieving the purpose of reducing construction risks, reducing construction measures costs, and speeding up construction periods.

Claims

1. A method for installing a triangular structure system for steel arch bridge rotation construction, characterized in that: The triangular structural system for the rotation construction of the steel arch bridge comprises a compression rod (3) and a tension rod (4) which are hinged to each other, wherein one end of the compression rod (3) which is hinged to the tension rod (4) is also connected to the bridge deck beam (7) via a rear cable (5), and a through-core oil cylinder (16) is installed on the rear cable (5); the other end of the compression rod (3) is hinged to one end of the steel arch (1), and the other end of the steel arch (1) is hinged to one end of the tension rod (4) which is not hinged to the compression rod; The method comprises the following steps: S1, completing the splicing of the steel arch (1) and the arch foot (2) on the bridge deck beam (7); S2, hinge one end of the steel arch (1) to one end of the compression rod (3), and respectively connect the other end of the compression rod (3) to the rear cable (5) and hinge to one end of the tension rod (4); S3, installing a core-penetrating oil cylinder (16) on the rear cable (5), and connecting the other end of the rear cable (5) to the bridge deck beam (7); S4, placing the other end of the pull rod (4) on a movable and liftable door-shaped bracket (17), wherein the door-shaped bracket (17) spans the steel arch (1); S5, retract the core-penetrating cylinder (16) to pull the rear cable (5), the compression rod (3) rotates upward, the pull rod (4) is lifted, and the gate-shaped bracket (17) moves and rises accordingly. When the gate-shaped bracket (17) moves to the position on the steel arch (1) corresponding to the connection with the pull rod (4), the pull rod (4) is removed from the gate-shaped bracket (17) and hinged to the steel arch (1), thereby completing the installation of the triangular structure system.

2. A method for installing a triangular structure system for steel arch bridge rotation construction according to claim 1, characterized in that: The two ends of the steel arch (1) are respectively provided with a first arch rib hinge (10) and a second arch rib hinge (11); the first arch rib hinge (10) is hinged to the compression rod (3), and the second arch rib hinge (11) is hinged to the tension rod (4).

3. A method for installing a triangular structure system for steel arch bridge rotation construction according to claim 2, characterized in that: A first compression rod hinge (9) is provided at one end of the compression rod (3), and the first compression rod hinge (9) is connected to a first arch rib hinge (10).

4. A method for installing a triangular structure system for steel arch bridge rotation construction according to claim 3, characterized in that: A second pressure rod hinge (14) and a third pressure rod hinge (15) are respectively provided on both sides of one end of the pressure rod (3); the second pressure rod hinge (14) is connected to the rear cable (5), and the third pressure rod hinge (15) is connected to the pull rod (4).

5. A method for installing a triangular structure system for steel arch bridge rotation construction according to claim 4, characterized in that: The two ends of the pull rod (4) are respectively provided with a first pull rod hinge (12) and a second pull rod hinge (13); the first pull rod hinge (12) is connected to the third pressure rod hinge (15), and the second pull rod hinge (13) is connected to the second arch rib hinge (11).

6. A method for installing a triangular structure system for steel arch bridge rotation construction according to claim 1, characterized in that: A plurality of tire frames (6) for supporting the steel arch (1) are provided on the bridge deck beam (7).

7. A method for installing a triangular structure system for steel arch bridge rotation construction according to claim 1, characterized in that: One end of the steel arch (1) connected to the compression rod (3) is also connected to an arch foot (2), and the steel arch (1) is connected to the arch foot (2) via a bottom hinge (8).

8. A method for installing a triangular structure system for steel arch bridge rotation construction according to claim 2, characterized in that: The first arch rib hinge (10) and the second arch rib hinge (11) are respectively welded to two ends of the steel arch (1).

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