Large-span swivel bridge structure based on self-anchored suspension structure and construction method

Abstract

This invention provides a large-span swing bridge structure and construction method based on a self-anchored suspension structure. The structure includes: a main bridge body, comprising a first pier, a main tower, and a first beam, the first beam being fixed to the top of the first pier; first suspension cable assemblies symmetrically arranged on both sides of the main tower, one end of each suspension cable assembly being fixed to the top of the main tower; and a swing system, comprising a pier cap, an upper turntable, and a lower turntable, the lower turntable being fixed to the top of the pier cap, the upper turntable being located above the lower turntable, the first pier being fixed to the top of the upper turntable, and a rotating assembly installed between the upper and lower turntables. The method includes: casting the lower turntable in place, constructing an annular slide, and placing spherical hinge supports; casting the upper turntable in place, fixing jack reaction seats, and placing support legs; completing the construction of the first pier, main tower, and first beam, arranging the first main cable, and tensioning the first suspender; and rotating the main bridge structure to the corresponding position. This invention is applicable to the construction of swing bridges of various spans, especially large spans.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and particularly relates to a large-span swing bridge structure and construction method based on a self-anchored suspension structure. Background Technology

[0002] To address the impact of grade-separated intersection construction on existing road traffic, bridge rotation technology has gained widespread attention due to its advantages of convenient, fast, safe, and reliable construction. Currently, it is mainly applied to the construction of continuous beam bridges and cable-stayed bridges. In recent years, the rapid development of construction materials and equipment has allowed bridge rotation spans to increase from tens of meters to hundreds of meters. Compared to continuous beam bridges and cable-stayed bridges, self-anchored suspension bridges are not limited by terrain, have greater spanning capacity, and are suitable for more complex engineering projects crossing existing roads. Rotating bridges are generally constructed in urban areas, and the self-anchored suspension system offers excellent aesthetic appeal, adding a touch of humanistic charm to urban construction. Summary of the Invention

[0003] This invention provides a long-span swing bridge structure and construction method based on a self-anchored suspension structure, aiming to further improve the load-bearing capacity and spanning capacity of swing bridges and provide a construction method for self-anchored swing suspension bridges.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] Long-span swing bridge structures based on self-anchored suspension structures include:

[0006] The main bridge body includes a first pier, a main tower, and a first beam. The first beam is fixed to the top of the first pier, and the main tower is fixed inside the first beam. First suspension cable assemblies are symmetrically arranged on both sides of the main tower. One end of the first suspension cable assembly is fixed to the top of the main tower, and the other end of the first suspension cable assembly is fixed to the first beam.

[0007] The rotating system includes a pier, an upper turntable, and a lower turntable. The lower turntable is fixed to the top of the pier, and the upper turntable is located above the lower turntable. The first pier is fixed to the top of the upper turntable. A rotating component is installed between the upper and lower turntables, and the upper turntable is connected to the rotating component.

[0008] Preferably, the rotating assembly includes an annular slide, a ball joint support, a support leg, a jack reaction seat, and a traction cable. The annular slide is fixed to the top of the lower turntable. The support leg contacts the annular slide through a PTFE plate, and the top of the support leg is fixed to the upper turntable. The ball joint support is located inside the annular slide, and its two ends are fixed to the upper turntable and the lower turntable, respectively. The jack reaction seat is fixed to the top of the support platform. The traction cable is embedded in the upper turntable and connected to the jack reaction seat.

[0009] Preferably, the first suspension assembly includes a first main cable, which is fixedly connected to both sides of the top of the mother tower. A first cable saddle is fixedly connected to both ends of the first beam. The other end of the first main cable is fixedly connected to the first beam through the first cable saddle. A plurality of first hangers are provided between the first main cable and the first beam. The two ends of the first hangers are fixedly connected to the first main cable and the first beam, respectively.

[0010] A construction method for a long-span swing bridge structure based on a self-anchored suspension structure, used to construct the aforementioned long-span swing bridge structure based on a self-anchored suspension structure, includes the following steps:

[0011] S1. After completing the foundation and pile cap, cast the turntable in place, erect the circular slide, and place the ball joint support;

[0012] S2. Cast the cast-in-place turntable, fix the jack reaction seat, place the support legs, and complete the rotation system;

[0013] S3. Complete the construction of the first pier, mother tower, and first beam. The first pier, mother tower, and first beam are all fixedly connected to form a tower-beam-pier rigid frame system. Lay the first main cable. After passing through the first cable saddle, the first main cable is anchored in the first beam. Tension the first hanger.

[0014] S4. Using the power of the jack reaction seat, the main bridge body is rotated to the corresponding position by pulling the traction cable pre-embedded in the upper turntable, adjusting the linearity of the main beam and the elevation of the beam segment, sealing the upper and lower turntables, and completing the construction of the single-tower self-anchored rotating suspension bridge.

[0015] Long-span swing bridge structures based on self-anchored suspension structures include:

[0016] The main bridge body includes a first pier, a main tower, and a first beam. The first beam is fixed to the top of the first pier, and the main tower is fixed inside the first beam. First suspension cable assemblies are symmetrically arranged on both sides of the main tower. One end of the first suspension cable assembly is fixed to the top of the main tower, and the other end of the first suspension cable assembly is fixed to the first beam.

[0017] The sub-bridge body includes a second pier, a sub-tower, and a second beam. A sliding support is fixedly connected to the top of the second pier. The second beam is connected to the top of the second pier through the sliding support. The second beam is fixedly connected to the first beam after rotation. The sub-tower is fixedly connected inside the second beam. Second suspension cable assemblies are symmetrically arranged on both sides of the sub-tower. One end of the second suspension cable assembly is fixedly connected to the top of the sub-tower, and the other end of the second suspension cable assembly is fixedly connected to the second beam. The second suspension cable assembly located in the closure section is connected to the first suspension cable assembly located in the closure section through prestressed steel strands. The connection between the second suspension cable assembly located in the closure section, the first suspension cable assembly located in the closure section, and the prestressed steel strands is cast-in-place with concrete.

[0018] The rotating system includes a pier, an upper turntable, and a lower turntable. The lower turntable is fixed to the top of the pier, and the upper turntable is located above the lower turntable. The first pier is fixed to the top of the upper turntable. A rotating component is installed between the upper and lower turntables, and the upper turntable is connected to the rotating component.

[0019] Preferably, the rotating assembly includes an annular slide, a ball joint support, a support leg, a jack reaction seat, and a traction cable. The annular slide is fixed to the top of the lower turntable. The support leg contacts the annular slide through a PTFE plate, and the top of the support leg is fixed to the upper turntable. The ball joint support is located inside the annular slide, and its two ends are fixed to the upper turntable and the lower turntable, respectively. The jack reaction seat is fixed to the top of the support platform. The traction cable is embedded in the upper turntable and connected to the jack reaction seat.

[0020] Preferably, the first suspension assembly includes a first main cable, which is fixedly connected to both sides of the top of the mother tower. A first cable saddle is fixedly connected to both ends of the first beam. The other end of the first main cable is fixedly connected to the first beam through the first cable saddle. A plurality of first hangers are provided between the first main cable and the first beam. The two ends of the first hangers are fixedly connected to the first main cable and the first beam, respectively. The first cable saddle located in the closure section is connected to the second suspension assembly located in the closure section through prestressed steel strands. The connection part of the second suspension assembly located in the closure section, the first suspension assembly located in the closure section, and the prestressed steel strands is cast-in-place with concrete.

[0021] Preferably, the second suspension assembly includes a second main cable, with the second main cable fixed to both sides of the top of the mother tower, and the second cable saddles fixed to both ends of the second beam. The other end of the second main cable is fixed to the second beam via the second cable saddles. A plurality of second hangers are provided between the second main cable and the second beam, with the two ends of the second hangers fixed to the second main cable and the second beam respectively. The first cable saddle located in the closure section is connected to the second cable saddle located in the closure section via prestressed steel strands, and the connection between the second suspension assembly located in the closure section, the first suspension assembly located in the closure section, and the prestressed steel strands is cast-in-place with concrete.

[0022] A construction method for a long-span swing bridge structure based on a self-anchored suspension structure, used to construct the aforementioned long-span swing bridge structure based on a self-anchored suspension structure, includes the following steps:

[0023] S1. Construct the main bridge body and the sub-bridge body separately to form two single-tower self-anchored rotating suspension bridges.

[0024] S2. After the two single-tower self-anchored rotating suspension bridges reach the corresponding positions through rotation, the upper and lower turntables are sealed.

[0025] S3. The first and second cable saddles of the closure section are horizontally connected by tensioning prestressed steel strands, and concrete is poured in place to complete the construction of the double-tower self-anchored rotating suspension bridge.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] 1. The site selection and construction of the large-span swing bridge structure based on the self-anchored suspension structure provided by this invention are not affected by the terrain.

[0028] 2. The large-span swing bridge structure based on the self-anchored suspension structure of the present invention provides a double-tower self-anchored swing suspension bridge. The double-tower self-anchored swing suspension bridge has a sub-tower and a mother tower, which makes the structural design more flexible and adaptable to the requirements. The connection between the first cable saddle and the second cable saddle makes the force transmission between the sub-tower and the mother tower continuous and reasonable.

[0029] 3. The double-tower self-anchored swing suspension bridge provided by this invention in the large-span swing bridge structure based on the self-anchored suspension structure is constructed as two independent single-tower self-anchored suspension bridges. After the swing, the closure and connection of the first and second cable saddles are carried out, which makes the construction simple and quick and shortens the construction period.

[0030] 4. This invention is applicable to the construction of various spans, especially large-span rotating bridges. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the single-tower self-anchored rotating suspension bridge in this invention;

[0033] Figure 2 This is a schematic diagram of the rotation system structure at the bottom of the pier in this invention;

[0034] Figure 3 This is a schematic diagram of the double-tower self-anchored rotating suspension bridge in this invention;

[0035] Figure 4 This is a schematic diagram of the closure section of the double-tower self-anchored rotating suspension bridge in this invention;

[0036] Among them, 1. First pier; 2. Spherical hinge bearing; 3. Pier; 4. First main cable; 5. First suspender; 6. First cable saddle; 7. First beam; 8. Lower turntable; 9. Upper turntable; 10. Jack reaction seat; 11. Support leg; 12. Circular slide; 13. Mother tower; 14. Sub-tower; 15. Prestressed steel strand; 16. Sliding bearing; 17. Second pier; 18. Second main cable; 19. Second suspender; 20. Second cable saddle; 21. Second beam; 22. Traction cable; 23. PTFE sheet. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] This invention provides a long-span swing bridge structure based on a self-anchored suspension structure, comprising:

[0040] The main bridge body includes a first pier 1, a main tower 13 and a first beam 7. The first beam 7 is fixed to the top of the first pier 1, and the main tower 13 is fixed inside the first beam 7. First suspension cable assemblies are symmetrically arranged on both sides of the main tower 13. One end of the first suspension cable assembly is fixed to the top of the main tower 13, and the other end of the first suspension cable assembly is fixed to the first beam 7.

[0041] The rotating system includes a pier 3, an upper turntable 9 and a lower turntable 8. The lower turntable 8 is fixed to the top of the pier 3, and the upper turntable 9 is located above the lower turntable 8. The first pier 1 is fixed to the top of the upper turntable 9. A rotating component is installed between the upper turntable 9 and the lower turntable 8, and the upper turntable 9 is connected to the rotating component.

[0042] Furthermore, the rotating assembly includes an annular slide 12, a ball joint support 2, a support leg 11, a jack reaction seat 10, and a traction cable 22. The annular slide 12 is fixed to the top of the lower turntable 8. The support leg 11 contacts the annular slide 12 through a PTFE plate 23. The top of the support leg 11 is fixed to the upper turntable 9. The ball joint support 2 is located inside the annular slide 12. The two ends of the ball joint support 2 are fixed to the upper turntable 9 and the lower turntable 8, respectively. The jack reaction seat 10 is fixed to the top of the support platform 3. The traction cable 22 is embedded in the upper turntable 9 and is connected to the jack reaction seat 10.

[0043] Furthermore, the first suspension assembly includes a first main cable 4, with the first main cable 4 fixedly connected to both sides of the top of the mother tower 13, and the first cable saddle 6 fixedly connected to both ends of the first beam 7. The other end of the first main cable 4 is fixedly connected to the first beam 7 through the first cable saddle 6. Several first suspenders 5 are provided between the first main cable 4 and the first beam 7, with both ends of the first suspenders 5 fixedly connected to the first main cable 4 and the first beam 7, respectively.

[0044] A construction method for a long-span swing bridge structure based on a self-anchored suspension structure, used to construct the aforementioned long-span swing bridge structure based on a self-anchored suspension structure, includes the following steps:

[0045] S1. After completing the foundation and the three parts of the pile cap, cast the turntable 8 in place, erect the annular slide 12, and place the ball hinge support 2.

[0046] S2. Cast the cast-in-place turntable 9, fix the jack reaction seat 10, place the support legs 11, and complete the rotation system;

[0047] S3. Complete the construction of the first pier 1, the mother tower 13, and the first beam 7. The first pier 1, the mother tower 13, and the first beam 7 are all fixedly connected to form a tower-beam-pier rigid frame system. Arrange the first main cable 4. After the first main cable 4 passes through the first cable saddle 6, it is anchored in the first beam 7. Tension the first hanger 5.

[0048] S4. Using the power of the jack reaction seat 10, the main bridge body is rotated to the corresponding position by pulling the pre-embedded traction cable 22 in the upper turntable 9, adjusting the linearity of the main beam and the elevation of the beam segment, sealing the upper turntable 9 and the lower turntable 8, and completing the construction of the single-tower self-anchored rotating suspension bridge.

[0049] Long-span swing bridge structures based on self-anchored suspension structures include:

[0050] The main bridge body includes a first pier 1, a main tower 13 and a first beam 7. The first beam 7 is fixed to the top of the first pier 1, and the main tower 13 is fixed inside the first beam 7. First suspension cable assemblies are symmetrically arranged on both sides of the main tower 13. One end of the first suspension cable assembly is fixed to the top of the main tower 13, and the other end of the first suspension cable assembly is fixed to the first beam 7.

[0051] The sub-bridge body includes a second pier 17, a sub-tower 14, and a second beam 21. A sliding support 16 is fixedly connected to the top of the second pier 17. The second beam 21 is connected to the top of the second pier 17 through the sliding support 16. The second beam 21 is fixedly connected to the first beam 7 after the rotation is completed. The sub-tower 14 is fixedly connected inside the second beam 21. Second suspension cable assemblies are symmetrically arranged on both sides of the sub-tower 14. One end of the second suspension cable assembly is fixedly connected to the top of the sub-tower 14, and the other end of the second suspension cable assembly is fixedly connected to the second beam 21. The second suspension cable assembly located in the closure section is connected to the first suspension cable assembly located in the closure section through prestressed steel strands 15. The connection part of the second suspension cable assembly located in the closure section, the first suspension cable assembly located in the closure section, and the prestressed steel strands 15 is cast-in-place concrete.

[0052] To address displacement caused by factors such as temperature, the first pier 1 and the first beam 7 of the twin-tower self-anchored rotating suspension bridge are rigidly connected, while a sliding support 16 is installed between the second beam 21 and the second pier 17.

[0053] The rotating system includes a pier 3, an upper turntable 9 and a lower turntable 8. The lower turntable 8 is fixed to the top of the pier 3, and the upper turntable 9 is located above the lower turntable 8. The first pier 1 is fixed to the top of the upper turntable 9. A rotating component is installed between the upper turntable 9 and the lower turntable 8, and the upper turntable 9 is connected to the rotating component.

[0054] Furthermore, the rotating assembly includes an annular slide 12, a ball joint support 2, a support leg 11, a jack reaction seat 10, and a traction cable 22. The annular slide 12 is fixed to the top of the lower turntable 8. The support leg 11 contacts the annular slide 12 through a PTFE plate 23. The top of the support leg 11 is fixed to the upper turntable 9. The ball joint support 2 is located inside the annular slide 12. The two ends of the ball joint support 2 are fixed to the upper turntable 9 and the lower turntable 8, respectively. The jack reaction seat 10 is fixed to the top of the support platform 3. The traction cable 22 is embedded in the upper turntable 9 and is connected to the jack reaction seat 10.

[0055] Furthermore, the first suspension assembly includes a first main cable 4, which is fixed to both sides of the top of the mother tower 13. The first beam 7 has first cable saddles 6 fixed to both ends. The other end of the first main cable 4 is fixed to the first beam 7 through the first cable saddles 6. Several first hangers 5 are provided between the first main cable 4 and the first beam 7. The two ends of the first hangers 5 are fixed to the first main cable 4 and the first beam 7 respectively. The first cable saddles 6 located in the closure section are connected to the second suspension assembly located in the closure section through prestressed steel strands 15. The connection between the second suspension assembly located in the closure section, the first suspension assembly located in the closure section, and the prestressed steel strands 15 is made of cast-in-place concrete.

[0056] Furthermore, the second suspension assembly includes a second main cable 18. The second main cable 18 is fixed to both sides of the top of the mother tower 13. The second beam 21 is fixed to both ends of the second cable saddle 20. The other end of the second main cable 18 is fixed to the second beam 21 through the second cable saddle 20. Several second hangers 19 are provided between the second main cable 18 and the second beam 21. The two ends of the second hangers 19 are fixed to the second main cable 18 and the second beam 21, respectively. The first cable saddle 6 located in the closure section is connected to the second cable saddle 20 located in the closure section through prestressed steel strands 15. The connection part of the second suspension assembly located in the closure section, the first suspension assembly located in the closure section, and the prestressed steel strands 15 is cast-in-place with concrete.

[0057] The first saddle 6 and the second saddle 20 of the closure section are horizontally connected by tensioned prestressed steel strands 15. The closure of the first beam 7 and the second beam 21, as well as the connection between the first saddle 6 and the second saddle 20, effectively ensure the continuity of force transmission in the structure.

[0058] A construction method for a long-span swing bridge structure based on a self-anchored suspension structure, used for constructing the aforementioned long-span swing bridge structure based on a self-anchored suspension structure, is characterized by comprising the following steps:

[0059] S1. Construct the main bridge body and the sub-bridge body separately to form two single-tower self-anchored rotating suspension bridges.

[0060] S2. After the two single-tower self-anchored rotating suspension bridges are rotated to the corresponding positions, the upper turntable 9 and the lower turntable 8 are sealed.

[0061] S3. The closure is carried out by horizontally connecting the first cable saddle 6 and the second cable saddle 20 of the closure section through tensioned prestressed steel strands 15 and then casting concrete in place to complete the construction of the double-tower self-anchored rotating suspension bridge.

[0062] The site selection and construction of the large-span rotating bridge structure based on a self-anchored suspension structure provided by this invention are not affected by terrain. This invention provides a double-tower self-anchored rotating suspension bridge. The double-tower self-anchored rotating suspension bridge, with its subsidiary tower 14 and mother tower 13, allows for more flexible and adaptable structural design. The connection between the first cable saddle 6 and the second cable saddle 20 ensures continuous and reasonable force transmission between the subsidiary tower 14 and the mother tower 13. The double-tower self-anchored rotating suspension bridge provided in this invention is constructed as two independent single-tower self-anchored suspension bridges. After rotation, closure and connection of the first cable saddle 6 and the second cable saddle 20 are performed, simplifying and speeding up construction and shortening the construction period. This invention is applicable to the construction of rotating bridges of various spans, especially large spans.

[0063] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0064] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A long-span swing bridge structure based on a self-anchored suspension structure, characterized in that: include: The main bridge body includes a first pier (1), a main tower (13) and a first beam (7). The first beam (7) is fixed to the top of the first pier (1), and the main tower (13) is fixed inside the first beam (7). The main tower (13) is symmetrically provided with first suspension cable assemblies on both sides. One end of the first suspension cable assembly is fixed to the top of the main tower (13), and the other end of the first suspension cable assembly is fixed to the first beam (7). The sub-bridge body includes a second pier (17), a sub-tower (14), and a second beam (21). The top of the second pier (17) is fixed with a sliding support (16). The second beam (21) is connected to the top of the second pier (17) through the sliding support (16). The second beam (21) is fixed to the first beam (7) after the rotation is completed. The sub-tower (14) is fixed inside the second beam (21). The second suspension cable assembly is symmetrically arranged on both sides of the sub-tower (14). One end of the second suspension cable assembly is fixed to the top of the sub-tower (14), and the other end of the second suspension cable assembly is fixed to the second beam (21). The second suspension cable assembly located in the closure section is connected to the first suspension cable assembly located in the closure section through prestressed steel strands (15). The connection part of the second suspension cable assembly located in the closure section, the first suspension cable assembly located in the closure section, and the prestressed steel strands (15) is cast in place with concrete. The rotating system includes a pier (3), an upper turntable (9) and a lower turntable (8). The lower turntable (8) is fixed to the top of the pier (3). The upper turntable (9) is located above the lower turntable (8). The first pier (1) is fixed to the top of the upper turntable (9). A rotating component is installed between the upper turntable (9) and the lower turntable (8). The upper turntable (9) is connected to the rotating component.

2. The long-span swing bridge structure based on a self-anchored suspension structure according to claim 1, characterized in that: The rotating assembly includes an annular slide (12), a ball joint support (2), a support leg (11), a jack reaction seat (10), and a traction cable (22). The annular slide (12) is fixed to the top of the lower turntable (8). The support leg (11) contacts the annular slide (12) through a tetrafluoroethylene plate (23). The top of the support leg (11) is fixed to the upper turntable (9). The ball joint support (2) is located inside the annular slide (12). The two ends of the ball joint support (2) are fixed to the upper turntable (9) and the lower turntable (8), respectively. The jack reaction seat (10) is fixed to the top of the support platform (3). The traction cable (22) is pre-embedded on the upper turntable (9) and is connected to the jack reaction seat (10).

3. The long-span swing bridge structure based on a self-anchored suspension structure according to claim 1, characterized in that: The first suspension assembly includes a first main cable (4), and the first main cable (4) is fixedly connected to both sides of the top of the mother tower (13). The first beam (7) is fixedly connected to both ends of the first cable saddle (6). The other end of the first main cable (4) is fixedly connected to the first beam (7) through the first cable saddle (6). A plurality of first suspenders (5) are provided between the first main cable (4) and the first beam (7). The two ends of the first suspenders (5) are fixedly connected to the first main cable (4) and the first beam (7) respectively. The first cable saddle (6) located in the closure section is connected to the second suspension assembly located in the closure section through prestressed steel strands (15). The second suspension assembly located in the closure section, the first suspension assembly located in the closure section and the prestressed steel strands (15) are connected by cast-in-place concrete.

4. The long-span swing bridge structure based on a self-anchored suspension structure according to claim 3, characterized in that: The second suspension assembly includes a second main cable (18). The second main cable (18) is fixed to both sides of the top of the sub-tower (14). The second beam (21) is fixed to both ends of a second cable saddle (20). The other end of the second main cable (18) is fixed to the second beam (21) through the second cable saddle (20). A number of second hangers (19) are provided between the second main cable (18) and the second beam (21). The two ends of the second hangers (19) are fixed to the second main cable (18) and the second beam (21) respectively. The first cable saddle (6) located in the closure section and the second cable saddle (20) located in the closure section are connected by prestressed steel strands (15). The second suspension assembly located in the closure section, the first suspension assembly located in the closure section and the prestressed steel strands (15) are connected by cast-in-place concrete.

5. A construction method for a long-span swing bridge structure based on a self-anchored suspension structure, used to construct the long-span swing bridge structure based on a self-anchored suspension structure as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Construct the main bridge body and the sub-bridge body separately to form two single-tower self-anchored rotating suspension bridges; S2. After the two single-tower self-anchored rotating suspension bridges are rotated to the corresponding positions, the upper turntable (9) and the lower turntable (8) are sealed. S3. The first and second cable saddles (20) of the closure section are horizontally connected by tensioning prestressed steel strands (15), and concrete is poured in place to complete the construction of the double-tower self-anchored rotating suspension bridge.

Images