Single-leaning-tower asymmetric parallel netting double-cable-plane steel box girder cable-stayed bridge and installation method thereof

Abstract

The invention discloses a single-leaning-tower asymmetric parallel netting double-cable-plane steel box girder cable-stayed bridge which comprises a steel box girder bridge deck, a single leaning tower, side-by-side stay cables, netting stay cables and a herringbone membrane structure framework, the single leaning tower is obliquely arranged in the length direction of the steel box girder bridge deck to form an outer inclined side and an inner inclined side, and the parallel stay cables are arranged between the inner inclined side and the steel box girder bridge deck; the side-by-side stay cables are located in the plane of the middle of the steel box girder bridge deck in the width direction, the top ends of the herringbone membrane structure frameworks are fixed to the two end faces, in the width direction of the steel box girder bridge deck, of the single leaning towers, and the bottom ends of the herringbone membrane structure frameworks are fixed to the ends, in the width direction of the steel box girder bridge deck, of the steel box girder bridge deck, so that the overall stress logic is optimized, and the structural stability is improved; and economical efficiency and aesthetic property are achieved.

Description

Technical Field

[0001] This invention belongs to the field of fixed steel structures for bridges, and specifically relates to a cable-stayed bridge with a single inclined tower, asymmetric parallel mesh double cable-stayed steel box girder and its installation method. Background Technology

[0002] A cable-stayed bridge, also known as a skeletal-stayed bridge, is a type of bridge where the main girder is directly supported by numerous cables to the bridge towers. It is a structural system composed of compression-bearing towers, tension-bearing cables, and bending-resistant girder sections. It can be viewed as a multi-span, elastically supported continuous beam where cables replace piers. This reduces bending moments within the girder, lowers the building height, reduces structural weight, and saves materials. A cable-stayed bridge mainly consists of towers, a main girder, and stay cables.

[0003] The conventional shapes of current cable-stayed bridges include H-shaped towers, A-frame towers, and arched towers. Parallel cable stays are installed on both sides to connect the towers and the bridge. However, with the increasing demands for architectural aesthetics, the conventional method of using parallel cable stays on both sides for H-shaped towers, A-frame towers, and arched towers has several drawbacks. These include simple and common structures with no unique appearance; large and simple main tower cross-sections without good streamlined shape; poor stress performance under wind loads; and poor economic efficiency. Summary of the Invention

[0004] This invention provides an asymmetric parallel-net double-cable-stayed steel box girder bridge with a single inclined tower and its installation method. It solves the technical problems of conventional H-shaped towers, A-frame towers and arched towers, which use parallel cable stays on both sides of the tower. These problems include simple and common structures with no unique appearance; large and simple main tower cross-sections without good streamlined shape; poor stress performance under wind force; and poor economic efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a single-tower asymmetric parallel-net double-cable-stayed steel box girder bridge, comprising a steel box girder bridge deck, a single-tower, parallel cable stays, a net cable system, and a human-shaped membrane structure skeleton. Several piers are provided at the bottom of the steel box girder bridge deck, supported on the ground. The bottom of the single-tower is supported on the ground and extends from bottom to top through the steel box girder bridge deck. The single-tower is located in the middle of the width direction of the steel box girder bridge deck. The single-tower is inclined in the length direction of the steel box girder bridge deck, forming an outward and inward inclination side. The parallel cable stays are arranged between the inward inclination side and the steel box girder bridge deck. The parallel cable stays are all located in the plane at the middle of the width direction of the steel box girder bridge deck. The two ends of the parallel cable stays are spaced apart in the height direction of the single-tower and at the middle of the width direction of the steel box girder bridge deck, respectively. The parallel cable stays are furthest from the highest cable of the single-tower when connected to the steel box girder bridge deck, and the parallel cable stays are furthest from the lowest cable of the single-tower when connected to the steel box girder bridge deck. The cables are arranged side-by-side at the points where they connect to the steel box girder bridge deck. The woven cables are positioned between the outward-sloping side and the steel box girder bridge deck. Two rows of woven cables are spaced apart along the height of the outward-sloping side of the single-tower tower. The other ends of these two rows are connected to the corresponding ends of the steel box girder bridge deck in the width direction. The highest cable of the single-tower tower is connected to the steel box girder bridge deck closest to the tower, while the lowest cable is connected to the steel box girder bridge deck furthest from the tower. One end of the woven cable is located in the middle of the steel box girder bridge deck in the width direction, and the other end is located at the end of the steel box girder bridge deck in the width direction, thus forming a woven cable pattern. The top of the human-shaped membrane structure skeleton is fixed to both ends of the single-tower tower in the width direction of the steel box girder bridge deck, and the bottom end of the human-shaped membrane structure skeleton is fixed to the end of the steel box girder bridge deck in the width direction. The human-shaped membrane structure skeletons on both sides form a herringbone shape.

[0006] By adopting the above-mentioned technical solutions, this structure achieves superior structural performance. The bridge design adheres to fluid mechanics principles, resulting in a more rational stress distribution. Its unique structural design features a compact single-tower cross-section. The main tower's sides innovatively combine parallel and woven cable arrangements, along with a human-shaped membrane structure framework. This optimizes the overall stress distribution logic, enhances structural stability, and combines economic efficiency with aesthetic appeal. Under the same material conditions, this structural design can support a larger span, effectively reducing construction costs and demonstrating excellent economic efficiency. Furthermore, its rich and novel shape creates a visually appealing effect. The human-shaped membrane structure framework can be used to fix and tension fiberglass-coated PTFE membrane structures and lighting components, resembling a sailboat sailing on the sea. As a local landmark, it is more spectacular and eye-catching, better adaptable to the construction needs of different scenarios.

[0007] Preferably, the bottom ends of the parallel inclined cables and the braided cables are both higher than the top of the human-shaped membrane structure skeleton.

[0008] By adopting the above technical solution, the structure is more stable and the visual effect is more aesthetically pleasing.

[0009] Preferably, the human-shaped membrane structure frame of the leaning tower is concave arc-shaped, and a tensioned glass fiber coated polytetrafluoroethylene membrane structure and lighting components are fixed on the human-shaped membrane structure frame.

[0010] By adopting the above technical solutions, the building resembles a sailboat sailing on the sea, serving as a local landmark that is more spectacular and eye-catching, and can better adapt to the construction needs of different scenarios.

[0011] Preferably, the leaning tower is welded from multiple sections, including an outer shell panel, a web, vertical ribs, horizontal ribs, a manhole, and a ladder. The web divides the outer shell panel into two spaces. Several vertical ribs are provided and welded and fixed along the length of the outer shell panel and the web. The horizontal ribs have slots around their perimeter that match the vertical ribs. The horizontal ribs are welded and fixed along the cross-sectional direction of the outer shell panel and the web. A manhole is formed through the middle of the horizontal rib. A ladder along the length of the leaning tower is welded to one side of the manhole on the horizontal rib.

[0012] By adopting the above technical solutions, the single-slanted tower has an ingenious structure, is easy to construct, and has good structural strength.

[0013] Preferably, an inner support is welded to the inward tilting side of the single-slope tower at the height of the top of the human-shaped membrane structure frame, and the top of the human-shaped membrane structure frame extends out of the single-slope tower on the inward tilting side, with the extended portion fixed to the inner support.

[0014] By adopting the above technical solutions, the overall three-dimensional shape is both beautiful and natural.

[0015] Preferably, the inner support includes a transverse bar welded to the single-slant tower and a longitudinal bar welded to the transverse bar. The human-shaped membrane structure skeleton is a grid-like structure composed of vertical bars and connecting bars. The top of the vertical bar is fixedly connected to the single-slant tower or the longitudinal bar by a welded support. V-shaped feet are provided at intervals on the connecting bars at the bottom of the vertical bar. The two feet of the V-shaped feet are welded to the steel box girder bridge deck.

[0016] By adopting the above technical solution, the human-shaped membrane structure skeleton has high connection strength.

[0017] Preferably, the bottom end of the human-shaped membrane structure skeleton extends out of the leaning tower on the inward side of the leaning tower, and the vertical pole extending furthest out of the leaning tower has an arc shape with a concave center.

[0018] By adopting the above technical solution, the structure is more stable and the visual effect is more aesthetically pleasing.

[0019] Preferably, the single-sloping tower has H-beams forming a grid pattern welded to both ends of the steel box girder bridge deck width direction. The outer facade steel plates are welded to the outer side of the H-beams. The H-beams and the outer facade steel plates are flush with the single-sloping tower on the outer inclined side, and after being flush with the top of the single-sloping tower on the inner inclined side, they extend out of the single-sloping tower to the bottom end, flush with the human-shaped membrane structure frame.

[0020] By adopting the above technical solutions, the glass fiber-coated polytetrafluoroethylene membrane structure and lighting components stretched on both sides of the leaning tower and human-shaped membrane structure frame are more stable and have more beautiful curves.

[0021] Preferably, the anchorages of the parallel stay cables and the braided cable at one end of the single-slant tower are welded to the single-slant tower, and the anchorages of the parallel stay cables and the braided cable at the steel box girder bridge deck are inserted into the steel box girder bridge deck for anchorage.

[0022] By adopting the above technical solution and using a conventional connection method, the connection can be guaranteed.

[0023] Preferably, the tilt angle of the single-slant tower is 80°-85°, the minimum tilt angle of the parallel stay cables is 40-50°, the maximum tilt angle of the parallel stay cables is 65-75°, the maximum tilt angle of the braided cable is 75-85°, the minimum tilt angle of the braided cable is 20-30°, and a reinforcing support is provided in the area of ​​the single-slant tower located below the steel box girder bridge deck. A reinforcing bracket located at the top of the steel box girder bridge deck is welded onto the single-slant tower.

[0024] By adopting the above technical solutions, the angle can meet the design requirements, thus ensuring the quality of the building.

[0025] A construction method for a single-tower, asymmetric, parallel-netted, double-cable-stayed steel box girder bridge includes the following steps: Step 1: Cast the bridge piers, and then cast the temporary support foundation under the steel box girder bridge deck; Step 2: Install the temporary support structure on the existing temporary support structure; Step 3: Use temporary supports to assist in the installation of the steel box girder bridge deck at the base of the single-slanted tower; Step 4: Install the leaning tower sections from bottom to top; Step 5: When the construction of the single-slant tower reaches the height of the braided cable and the parallel cable stays, first install the single-slant tower, then install the braided cable and pre-tension it for support, and then hang the two ends of the parallel cable stays and simultaneously install the steel box girder bridge deck. Step 6: Continue installing the next section of the single-slope tower, the bracing of the cables, and the parallel stay cables, repeating this process until the entire single-slope tower is installed; Step 7: Perform the final tensioning of the braided cables and parallel inclined cables; Step 8: Weld the human-shaped membrane structure frame to the single-slanted tower and the steel box girder bridge deck respectively; Step 9: Tension a glass fiber reinforced polytetrafluoroethylene (PTFE) membrane structure and lighting fixtures onto the outside of the herringbone steel frame; Step 10: Remove the temporary supports to complete the construction of the entire structure.

[0026] The beneficial effects of this invention are reflected in the following aspects: In terms of stress performance, the bridge design conforms to the principles of fluid mechanics, and the structural stress is more reasonable. With a unique structural design, the single tower has a small cross-section. The main tower innovatively adopts a combination of parallel and woven cable forms on both sides, combined with a human-shaped membrane structure skeleton. Since the cables are symmetrically distributed on both sides of the main beam, they together form a strong spatial structure. When the bridge is subjected to asymmetrical loads (such as vehicle deviation) or strong winds, the double-cable-stayed structure provides strong torsional stiffness, effectively suppressing the torsion and deformation of the main beam, ensuring smooth and safe driving. It optimizes the overall stress logic, improves structural stability, and is both economical and aesthetically pleasing. Under the same material conditions, this structural design can support a larger span, effectively reducing construction costs and demonstrating good economic efficiency. At the same time, the design is rich and novel, with a beautiful visual effect. The human-shaped membrane structure skeleton can fix tensioned glass fiber coated polytetrafluoroethylene membrane structure and lighting components. The structure and connection method of the human-shaped membrane structure skeleton itself, as well as the transition connection method with the leaning tower, constitute a clever transition, resembling a sailboat sailing on the sea. As a local landmark building, it is more spectacular and eye-catching, and can better adapt to the construction needs of different scenarios. During construction, the pre-tensioned woven cable is used for pre-fixation, which greatly saves on construction support, reduces the construction period, and saves costs.

[0027] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objects and other advantages of the invention may be realized and obtained by means of the embodiments particularly pointed out in the description. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a front view of the overall structure of an embodiment of the present invention; Figure 3 This is a side view of the overall structure of an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of a single-leaning tower according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the inner support in an embodiment of the present invention; Figure 6 This is a diagram showing the connection between the human-shaped membrane structure skeleton and the steel box girder bridge deck according to an embodiment of the present invention.

[0029] Attached reference numerals: 1. Steel box girder bridge deck; 2. Single inclined tower; 201. Outer inclined side; 202. Inner inclined side; 203. Shell wall panel; 204. Web plate; 205. Vertical rib plate; 206. Transverse rib plate; 207. Manhole; 208. Ladder; 209. I-beam; 210. Exterior facade steel plate; 3. Parallel cable stays; 4. Braided cable stays; 5. Human-shaped membrane structure skeleton; 501. Inner support; 502. Transverse bar; 503. Longitudinal bar; 504. Vertical bar; 505. Connecting bar; 506. V-shaped support; 6. Pier; 7. Temporary support foundation; 701. Temporary support. Detailed Implementation

[0030] The technical solutions of the present invention will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and should not be construed as limiting the technical solutions of the present invention.

[0031] Combination Figure 1-6 The single-tower asymmetrical parallel cable-stayed bridge with double cable-stayed surfaces comprises a steel box girder deck 1, a single-tower 2, parallel cable stays 3, cable nets 4, and a human-shaped membrane structure frame 5. Several piers 6 are located at the bottom of the steel box girder deck 1, supporting the structure on the ground. The bottom of the single-tower 2 is also supported on the ground and extends from bottom to top through the steel box girder deck 1. The single-tower 2 is located in the middle of the width of the steel box girder deck 1, and is inclined outwards along the length of the steel box girder deck 1, forming an outward tilt of 20°. 1. Parallel stay cables are installed between the inward-sloping side 202 and the steel box girder bridge deck 1. The parallel stay cables 3 are all located in the plane at the midpoint of the width direction of the steel box girder bridge deck 1. The two ends of the parallel stay cables 3 are spaced apart at the height direction of the single-tower 2 and at the midpoint of the width direction of the steel box girder bridge deck 1, respectively. The parallel stay cables 3 are furthest from the highest cable of the single-tower 2 when connected to the steel box girder bridge deck 1, and the parallel stay cables 3 are furthest from the lowest cable of the single-tower 2 when connected to the steel box girder bridge deck 1. The structure of the single-tower 2 is formed by two rows of braided cables 4, which are located between the outward-sloping side 201 and the steel box girder bridge deck 1. The outward-sloping side 201 of the single-tower 2 has two rows of braided cables 4 spaced apart in the height direction. The other ends of the two rows of braided cables 4 are respectively connected to the ends of the corresponding steel box girder bridge deck 1 in the width direction. The braided cables 4 are closest to the single-tower 2 when the highest cable of the single-tower 2 is connected to the steel box girder bridge deck 1, and the braided cables 4 are closest to the single-tower 2 when the lowest cable of the single-tower 2 is connected to the steel box girder bridge deck 1. The location closest to the single-slanted tower 2 on the bridge deck 1 is the furthest. The braided cable 4 is located at one end of the single-slanted tower 2 in the middle of the width direction of the steel box girder bridge deck 1, and the other end is located at the end of the width direction of the steel box girder bridge deck 1, thus forming a braided shape. The top of the human-shaped membrane structure skeleton 5 is fixed to the two ends of the single-slanted tower 2 in the width direction of the steel box girder bridge deck 1, and the bottom of the human-shaped membrane structure skeleton 5 is fixed to the end of the width direction of the steel box girder bridge deck 1. The human-shaped membrane structure skeletons 5 on both sides form a herringbone shape.

[0032] In terms of structural performance, this bridge design adheres to the principles of fluid mechanics, resulting in a more rational stress distribution. Its unique structural design features a compact single-tower cross-section, and the main tower innovatively employs a combination of parallel and woven cable arrangements on both sides, coupled with a human-shaped membrane structure frame 5. This optimizes the overall stress logic, enhances structural stability, and combines economic efficiency with aesthetics. Under the same material conditions, this structural design can support a larger span, effectively reducing construction costs and demonstrating excellent economic performance. Furthermore, its rich and novel shape creates a visually appealing effect. The human-shaped membrane structure frame 5 can fix and tension the fiberglass-coated PTFE membrane structure and lighting components, resembling a sailboat sailing on the sea. As a local landmark, it is more spectacular and eye-catching, better adaptable to the construction needs of different scenarios.

[0033] The bottom ends of the parallel inclined cables 3 and the braided cables 4 are both higher than the top of the human-shaped membrane structure skeleton 5, resulting in better structural stability and a more aesthetically pleasing appearance.

[0034] The human-shaped membrane structure frame 5 of the single leaning tower is concave arc. Tensioned glass fiber coated polytetrafluoroethylene membrane structure and lighting components are fixed on the human-shaped membrane structure frame 5, resembling a sailboat sailing on the sea. As a local landmark building, it is more spectacular and eye-catching, and can better adapt to the construction needs of different scenarios.

[0035] The single-sloping tower 2 is constructed from multiple welded sections, including an outer shell panel 203, a web plate 204, vertical ribs 205, horizontal ribs 206, a manhole 207, and a ladder 208. The web plate 204 divides the outer shell panel 203 into two spaces. Several vertical ribs 205 are provided and welded and fixed along the length of the outer shell panel 203 and the web plate 204. The horizontal ribs 206 have slots around their perimeter that match the vertical ribs 205. The horizontal ribs 206 are welded and fixed along the cross-sectional direction of the outer shell panel 203 and the web plate 204. A manhole 207 is formed through the middle of the horizontal ribs 206. A ladder 208 along the length of the single-sloping tower 2 is welded to one side of the manhole 207 on the horizontal ribs 206. The single-sloping tower 2 has an ingenious structure, is easy to construct, and has good structural strength.

[0036] The inner side 202 of the leaning tower 2 corresponds to the height of the top of the human-shaped membrane structure frame 5 and is welded with an inner support 501. The top of the human-shaped membrane structure frame 5 extends out of the leaning tower 2 from the inner side 202 and the extended part is fixed on the inner support 501. The overall three-dimensional shape is beautiful and not abrupt.

[0037] The inner support 501 includes a transverse rod 502 welded to the single-slanted tower 2 and a longitudinal rod 503 welded to the transverse rod 502. The human-shaped membrane structure frame 5 is a grid-like structure composed of vertical rods 504 and connecting rods 505. The top of the vertical rod 504 is fixedly connected to the single-slanted tower 2 or the longitudinal rod 503 by welding supports. The connecting rods 505 at the bottom end of the vertical rod 504 are provided with V-shaped legs 506 at intervals. The two legs of the V-shaped legs 506 are welded to the steel box girder bridge deck 1. The human-shaped membrane structure frame 5 has high connection strength.

[0038] The bottom end of the human-shaped membrane structure frame 5 extends out of the leaning tower 2 from the inner side 202, and the vertical rod 504 extending the farthest from the leaning tower 2 is in an arc shape with a concave center, which makes the structure more stable and visually more beautiful.

[0039] The single-sloping tower 2 has H-beams 209 forming a grid pattern welded to both ends of the steel box girder bridge deck 1. The outer facade steel plates 210 are welded to the outer side of the H-beams 209. The H-beams 209 and the outer facade steel plates 210 are flush with the single-sloping tower 2 on the outer inclined side 201, and after being flush with the top of the single-sloping tower 2 on the inner inclined side 202, they extend out of the single-sloping tower 2 to the bottom end, which is flush with the human-shaped membrane structure frame 5. The glass fiber coated polytetrafluoroethylene membrane structure and lighting components stretched on both sides of the single-sloping tower 2 and the human-shaped membrane structure frame 5 are more stable and have more beautiful curves.

[0040] The anchorages of the parallel stay cables 3 and the braided cable 4 at one end of the single-slant tower 2 are welded to the single-slant tower 2. The anchorages of the parallel stay cables 3 and the braided cable 4 at the steel box girder bridge deck 1 are inserted into the steel box girder bridge deck 1 for anchoring. The conventional connection method is adopted, which can ensure the connection.

[0041] The tilt angle of the single-slanted tower 2 is 80°-85°, the minimum tilt angle of the parallel cable stays 3 is 40-50°, the maximum tilt angle of the parallel cable stays 3 is 65-75°, the maximum tilt angle of the braided cable stays 4 is 75-85°, and the minimum tilt angle of the braided cable stays 4 is 20-30°. The area of ​​the single-slanted tower 2 located below the steel box girder bridge deck 1 is equipped with reinforcement supports. The reinforcement brackets located at the top of the steel box girder bridge deck 1 are welded on the single-slanted tower 2. The angles meet the design requirements and ensure the quality of the structure.

[0042] The construction method includes the following steps: Step 1: Cast the bridge pier 6, and then cast the temporary support foundation 7 under the steel box girder bridge deck 1; Step 2: Install temporary support 701 on temporary support foundation 7; Step 3: Use temporary supports to assist in the installation of the steel box girder bridge deck 1 at the base of the two inclined towers; Step 4: Install the two sections of the leaning tower from bottom to top; Step 5: When the construction of the single-slant tower 2 reaches the height of the braided cable 4 and the parallel cable 3, first install the single-slant tower 2, then install the braided cable 4 and pre-tension it for support, and then hang the two ends of the parallel cable 3 and simultaneously install the steel box girder bridge deck 1. Step 6: Continue installing the next higher section of the single-slope tower 2, the braided cable 4, and the parallel cable 3, and repeat until the entire single-slope tower 2 is installed; Step 7: Perform the final tensioning of the braided cable 4 and the parallel inclined cable 3; Step 8: Weld the human-shaped membrane structure frame 5 to the single inclined tower 2 and the steel box girder bridge deck 1 respectively; Step 9: Tension a glass fiber reinforced polytetrafluoroethylene (PTFE) membrane structure and lighting fixtures onto the outside of the herringbone steel frame; Step 10: Remove the temporary supports to complete the construction of the entire structure.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A single-inclined-pylon asymmetric parallel-woven double-cable-plane steel box girder cable-stayed bridge, characterized in that, The application relates to a steel box girder bridge deck (1), a single-inclined tower (2), side-by-side stay cables (3), netting cables (4) and a human-shaped membrane structure framework (5), the bottom end of the steel box girder bridge deck (1) is provided with a plurality of piers (6) which are supported on the ground, the bottom end of the single-inclined tower (2) is supported on the ground and penetrates the steel box girder bridge deck (1) from bottom to top, the single-inclined tower (2) is located in the middle of the width direction of the steel box girder bridge deck (1), the single-inclined tower (2) is inclinedly arranged in the length direction of the steel box girder bridge deck (1) to form an outer-inclined side (201) and an inner-inclined side (202), parallel stay cables are arranged between the inner-inclined side (202) and the steel box girder bridge deck (1), the side-by-side stay cables (3) are located in the plane of the middle of the width direction of the steel box girder bridge deck (1), the two ends of the side-by-side stay cables (3) are arranged at intervals in the height direction of the single-inclined tower (2) and at intervals in the middle of the width direction of the steel box girder bridge deck (1), the side-by-side stay cables (3) are connected to the position farthest from the single-inclined tower (2) on the steel box girder bridge deck (1) at the highest stay cable of the single-inclined tower (2), and the side-by-side stay cables (3) are connected to the position closest to the single-inclined tower (2) on the steel box girder bridge deck (1) at the lowest stay cable of the single-inclined tower (2) to form a side-by-side shape, the netting cables (4) are arranged between the outer-inclined side (201) and the steel box girder bridge deck (1), the outer-inclined side (201) of the single-inclined tower (2) is provided with two rows of netting cables (4) arranged at intervals in the height direction, the other ends of the two rows of netting cables (4) are connected to the corresponding end portions in the width direction of the steel box girder bridge deck (1), the netting cables (4) are connected to the position closest to the single-inclined tower (2) on the steel box girder bridge deck (1) at the highest stay cable of the single-inclined tower (2), the netting cables (4) are connected to the position farthest from the single-inclined tower (2) on the steel box girder bridge deck (1) at the lowest stay cable of the single-inclined tower (2), the netting cables (4) are connected to the middle of the width direction of the steel box girder bridge deck (1) at one end of the single-inclined tower (2) and to the end portion in the width direction of the steel box girder bridge deck (1) at the other end of the single-inclined tower (2) to form a netting shape, the top end of the human-shaped membrane structure framework (5) is fixed to the single-inclined tower (2) on the two end faces in the width direction of the steel box girder bridge deck (1), and the bottom end of the human-shaped membrane structure framework (5) is fixed to the end portion in the width direction of the steel box girder bridge deck (1), and the human-shaped membrane structure frameworks (5) on the two sides form a herringbone shape.

2. The asymmetrical parallel double cable plane steel box girder cable-stayed bridge with single-inclined tower and asymmetric parallel coding net according to claim 1, characterized in that: The bottom ends of the side-by-side stay cables (3) and the netting cables (4) are higher than the top end of the human-shaped membrane structure framework (5).

3. The asymmetrical parallel double-cable-plane steel box girder cable-stayed bridge with single-inclined tower and asymmetric parallel coding nets according to claim 2, characterized in that: The human-shaped membrane structure framework (5) is in an arc shape concave downward, and a glass fiber-coated polytetrafluoroethylene membrane structure and a brightening lamp decoration assembly are fixed on the human-shaped membrane structure framework (5).

4. The asymmetrical parallel double-cable-plane steel box girder cable-stayed bridge with single-inclined tower and asymmetrically arranged nets according to claim 3, characterized in that: The single-inclined tower (2) is welded by multiple sections, including shell wall plates (203), webs (204), vertical rib plates (205), horizontal rib plates (206), manholes (207) and ladders (208), the webs (204) separate the shell wall plates (203) into two spaces, the vertical rib plates (205) are arranged along the length direction of the shell wall plates (203) and the webs (204) and are welded and fixed, the horizontal rib plates (206) have matching slots on the periphery with the vertical rib plates (205), the horizontal rib plates (206) are welded and fixed along the cross-section direction of the shell wall plates (203) and the webs (204), the manholes (207) are formed in the middle of the horizontal rib plates (206), and the ladders (208) are welded on one side of the manholes (207) along the length direction of the single-inclined tower (2).

5. The asymmetrical parallel double-cable-plane steel box girder cable-stayed bridge with single-inclined tower and asymmetric parallel coding nets according to claim 4, characterized in that: The inner-inclined side (202) of the single-inclined tower (2) is welded with an inner side support (501) corresponding to the height of the top of the human-shaped membrane structure framework (5), the top of the human-shaped membrane structure framework (5) extends out of the single-inclined tower (2) on the inner-inclined side (202) of the single-inclined tower (2) and the extended part is fixed on the inner side support (501), the inner side support (501) includes a horizontal rod (502) welded on the single-inclined tower (2) and a vertical rod (503) welded on the horizontal rod (502), the human-shaped membrane structure framework (5) is in a grid shape composed of vertical rods (504) and connecting rods (505), the top end of the vertical rod (504) is fixedly connected on the single-inclined tower (2) or the vertical rod (503) through a welded support, and the connecting rod (505) at the bottom end of the vertical rod (504) is arranged with V-shaped supports (506) at intervals, and the two feet of the V-shaped support (506) are welded on the steel box girder bridge deck (1).

6. The asymmetrical parallel double-cable-plane steel box girder cable-stayed bridge with single-inclined tower and asymmetric parallel coding nets according to claim 5, characterized in that: The bottom end of the human-shaped membrane structure framework (5) extends out of the single-inclined tower (2) on the inner-inclined side (202) of the single-inclined tower (2), and the vertical rod (504) that extends farthest out of the single-inclined tower (2) is in an arc shape with a concave middle part.

7. The asymmetrical parallel double-cable-plane steel box girder cable-stayed bridge with single-inclined tower and asymmetric parallel coding nets according to claim 6, characterized in that: The single-inclined tower (2) is welded with I-beams (209) constituting a grid shape on the two end faces in the width direction of the steel box girder bridge deck (1), the outer side of the I-beam (209) is welded with an outer facade steel plate (210), the I-beam (209) and the outer facade steel plate (210) are flush with the single-inclined tower (2) on the outer-inclined side (201) of the single-inclined tower (2), and after being flush with the single-inclined tower (2) on the top of the inner-inclined side (202) of the single-inclined tower (2), the I-beam (209) and the outer facade steel plate (210) extend out of the single-inclined tower (2) to the bottom end and are flush with the human-shaped membrane structure framework (5).

8. The asymmetrical parallel double-cable-plane steel box girder cable-stayed bridge with single-inclined tower and asymmetrically arranged nets according to claim 7, characterized in that: The anchorages connected with the parallel cable (3) and the net cable (4) on one end of the single-inclined tower (2) are welded on the single-inclined tower (2), and the anchorages connected with the parallel cable (3) and the net cable (4) on the steel box girder bridge deck (1) are anchored into the steel box girder bridge deck (1).

9. The asymmetrical parallel double-cable-plane steel box girder cable-stayed bridge with single-inclined tower and asymmetrically arranged nets according to claim 8, characterized in that: The inclination angle of the single-inclined tower (2) is 80-85°, the minimum inclination angle of the side-by-side stay cable (3) is 40-50°, the maximum inclination angle of the side-by-side stay cable (3) is 65-75°, the maximum inclination angle of the net cable (4) is 75-85°, the minimum inclination angle of the net cable (4) is 20-30°, the single-inclined tower (2) is provided with a reinforcing support in the area below the steel box girder bridge deck (1), and a reinforcing bracket located on the top of the steel box girder bridge deck (1) is welded on the single-inclined tower (2).

10. The construction method of the single-inclined-pylon asymmetric parallel-woven double-cable-plane steel box girder cable-stayed bridge according to any one of claims 1-9, characterized in that: The method comprises the following steps, Step one, pouring the bridge pier (6) and then pouring the temporary support foundation (7) below the steel box girder bridge deck (1); Step two, installing the temporary support (701) on the temporary support foundation (7); Step three, installing the steel box girder bridge deck (1) at the root of the single-inclined tower (2) with the aid of the temporary support; Step four, installing the single-inclined tower (2) from bottom to top in sections; Step five, when the single-inclined tower (2) is constructed to the height of the net cable (4) and the side-by-side stay cable (3), first installing the single-inclined tower (2), then installing the net cable (4) and pre-tensioning for support, and then hanging the two ends of the side-by-side stay cable (3) to synchronously install the steel box girder bridge deck (1); Step six, continuing to install the single-inclined tower (2), the net cable (4) and the side-by-side stay cable (3) in higher sections and repeating until the single-inclined tower (2) is completely installed; Step seven, performing the final tensioning of the net cable (4) and the side-by-side stay cable (3); Step eight, welding the humanoid membrane structure framework (5) with the single-inclined tower (2) and the steel box girder bridge deck (1) respectively; Step nine, tensioning the glass fiber polytetrafluoroethylene membrane structure and brightening the lamp decoration on the outside of the herringbone steel skeleton; Step ten, removing the temporary support and completing the construction of the entire structure.

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