A foot suspension bridge and method employing a spatially combined chain-cable anchoring system

Abstract

The application relates to a pedestrian suspension bridge and method adopting a spatial combined chain rod anchoring system, and belongs to the technical field of suspension bridges. The pedestrian suspension bridge adopting the spatial combined chain rod anchoring system comprises a bridge main body, the bridge main body comprises a bridge pier and two steel main towers symmetrically arranged on the top of the bridge pier, connectors for anchoring main spans of main cables are arranged at the top of the steel main towers, a concrete single-pile foundation is provided with a plurality of fan-shaped interval distribution sides of the bridge main body, and a cable-stayed rod is hingedly connected between the concrete single-pile foundation and the connector, so that the axial tension of the bridge main body is transmitted to the concrete single-pile foundation. The application can avoid the problems of large land occupation area and high construction cost of the gravity type single-pile foundation, and can be arranged at an arbitrary position in a small-span topography, and then the construction depth is determined according to stress calculation and analysis, so that the stress can be met.

Description

Technical Field

[0001] This application relates to the field of suspension bridge technology, and in particular to a pedestrian suspension bridge and method employing a spatially combined chain anchoring system. Background Technology

[0002] Compared to conventional bridges, landscape bridge design places greater emphasis on the landscape design of the bridge. Bridge landscape design is a design discipline that simultaneously considers the "landscape audience" (the public), the "landscape subject" (the bridge), and the "landscape carrier" (the environment). Landscape bridges establish a new design model of "parallel landscape design and structural design" from the initial design stage. It is necessary to arrange the bridge type according to the actual terrain of the bridge site in order to achieve a beautiful landscape and a reasonable bridge type.

[0003] Urban pedestrian bridges mostly adopt beam structures or beam-arch combination structures, and rarely adopt flexible bridge structures such as cable-stayed or suspension bridges. When conventional suspension bridge structures are used due to landscape requirements, the side spans are relatively large in order to ensure the reasonable arrangement of the bridge spans, which will occupy a large area of ​​land and increase the land area occupied by the bridge. Summary of the Invention

[0004] This application provides a pedestrian suspension bridge and method using a spatially combined chain anchoring system to solve the problem that existing suspension bridge structures in the related art have large side spans and occupy a lot of space, making them inconvenient to construct in terrain-restricted situations.

[0005] The first aspect of this application provides a pedestrian suspension bridge employing a spatially combined chain anchoring system, comprising:

[0006] The main body of the bridge includes piers and two steel main towers hinged to the top of the piers and arranged symmetrically. The top of the steel main towers is provided with connectors for anchoring the main cable of the main span.

[0007] A concrete monopile foundation, wherein multiple concrete monopile foundations are provided and distributed in a fan-shaped interval on the side span of the main body of the bridge;

[0008] A tie rod is hinged between the concrete monopile foundation and the connector to transfer the axial tensile force of the bridge body to the concrete monopile foundation.

[0009] In some embodiments, the concrete monopile foundations located on the same side span are divided into two groups, and the number of concrete monopile foundations in both groups is even. Each group of concrete monopile foundations is hinged to a connector at the top of the same steel main tower via a tie rod.

[0010] In some embodiments, the same group of concrete monopile foundations are symmetrically arranged along the extension direction of the main cable of the main span, and two groups of concrete monopile foundations are symmetrically arranged about the central axis of the bridge body.

[0011] In some embodiments, the connector has a channel, and the free end of the main span cable is connected to the channel via an anchor head.

[0012] In some embodiments, a hinged seat is provided on the concrete monopile foundation, and the end of the tie rod away from the connector is hinged to the hinged seat via a hinge shaft.

[0013] In some embodiments, the main body of the bridge also includes a main span steel beam mounted on the piers, a main span cable mounted above the piers and connected to the main steel tower, and suspenders mounted between the main span steel beam and the main span cable;

[0014] The bridge has two piers, and the main span steel beam is laid across the two piers. The main span cable is connected to the steel main tower through a connector.

[0015] In some embodiments, there are several slings, and the several slings are arranged linearly at equal intervals along the length of the main span steel beam.

[0016] In some embodiments, one end of the sling is connected to the main span steel beam via a pin connection;

[0017] The other end of the sling is connected to the main cable of the main span via a pin connection.

[0018] In some embodiments, the piers are portal piers, the main span steel beams are longitudinal and transverse steel plate beams, the suspension cables are sealed steel wire ropes, the main steel towers are king-shaped steel structures, and the tie rods are I-shaped steel structures.

[0019] The second aspect of this application provides a construction method for a pedestrian suspension bridge employing a spatially combined chain anchoring system, comprising the following steps:

[0020] When the construction of a suspension bridge is limited by the terrain in terms of span, the bridge is first designed according to the terrain to determine the location of the bridge construction. Then, any location that can be placed on the side span of the bridge is found. Next, the construction depth of the concrete monopile foundation is calculated based on the location of the bridge and the location of the concrete monopile foundation to ensure that the concrete monopile foundation can bear the axial tensile force of the bridge.

[0021] After determining the construction depth of the concrete monopile foundation, the construction of two piers for support begins. A steel main tower is built on the top of each of the two columns of each pier. A connector is installed at the end of the steel main tower away from the pier. Then, the concrete monopile foundation is constructed in the designated position.

[0022] There are an even number of concrete monopile foundations at each side span of the steel main tower, and they are symmetrically arranged along the extension direction of the main cable of the main span. The concrete monopile foundations at the two steel main towers on the same side span are distributed in a fan-shaped interval. After the concrete monopile foundations are constructed, one end of the tie rod is connected to the concrete monopile foundation through the hinge seat, and the other end is hinged to the connector.

[0023] Next, the main span cable is laid, then the suspension cables are laid on the main span cable, and finally the main span steel beam is laid between the two piers and connected to the suspension cables to complete the bridge construction.

[0024] This application provides a pedestrian suspension bridge and method using a spatially combined chain anchoring system. When terrain is limited, the concrete monopile foundation occupies a small area and can be constructed at any suitable location on the side span of the bridge without requiring a fixed distance from the bridge. Once a suitable location is found, the construction depth is determined by analyzing the stress on the bridge and the concrete monopile foundation at the construction location. Different construction depths can bear the stress at different locations, avoiding the large footprint and high cost of gravity anchor foundations, and the fixed location distance in small-span terrain, which makes some locations unusable.

[0025] When the span of the bridge side span is small, the friction provided by the saddle cannot balance the unbalanced horizontal force of the main cable of the main span. Therefore, in this structure, the saddle is not used but a connector is used to connect the main cable of the main span and the hinged diagonal rod. Combined with the overall bridge structure and the setting of the diagonal rod, the unbalanced force is balanced, and the diagonal rod is only subjected to axial tensile force and not bending moment.

[0026] The main steel tower and the main span steel beam are also hinged together by a hinge shaft. The hinged connection makes the force transmission direction of the main span steel beam clearer, transmitting only axial force.

[0027] There are two concrete monopile foundations at each steel main tower, arranged symmetrically in a figure-eight shape. The concrete monopile foundations at the two steel main towers are also distributed in a fan shape. After the construction of the concrete monopile foundations, one end of the tie rod is connected to the concrete monopile foundation through a hinged seat, and the other end is hinged to the connector. The two concrete monopile foundations connected to each pier are arranged symmetrically to avoid uneven stress on individual piers. The overall arrangement of the concrete monopile foundations at the two piers on the bridge pier is also symmetrical and fan-shaped, so that the two piers are stressed evenly, and the overall stress on the bridge pier is even. The fan-shaped arrangement improves the bearing capacity, increases the overall stress area, and reduces the stress intensity of individual concrete monopile foundations. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a front view schematic diagram provided for an embodiment of this application;

[0030] Figure 2 A top view schematic diagram provided for an embodiment of this application;

[0031] Figure 3 A side view schematic diagram provided for an embodiment of this application;

[0032] Figure 4 Structural schematic diagrams of the slings and main span steel beams in this application;

[0033] Figure 5 This is a schematic diagram of the connector provided in this application.

[0034] 1. Pier; 2. Main span steel beam; 3. Suspension cable; 4. Main span main cable; 5. Steel main tower; 6. Tie rod; 7. Concrete monopile foundation; 71. Hinged seat; 8. Connector; 81. Duct. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] This application provides a pedestrian suspension bridge and method using a spatially combined chain anchoring system, which can solve the problem that existing suspension bridge structures have large side spans and occupy a lot of space, making them inconvenient to construct in terrain-restricted conditions.

[0037] See Figure 1-5 As shown, the first aspect of this application provides a pedestrian suspension bridge employing a spatially combined chain anchoring system, comprising:

[0038] The main body of the bridge includes two piers 1 supported on the ground. The two piers 1 are located at the two construction ends of the bridge. The steel main towers 5 are symmetrically arranged on the piers 1 by hinges. The hinged arrangement of the steel main towers 5 makes the force transmission clearer, transmitting only axial force. The main span cable 4 is set above the piers 1. The two ends of the main span cable 4 are connected to the connectors 8 on the steel main towers 5. Several suspenders 3 are evenly spaced along the length of the main span cable 4 and connected to the main span steel beam 2 set across the two piers 1.

[0039] Concrete monopile foundation 7, due to its small footprint when terrain is limited, can be constructed at any suitable location on the side span of the bridge without needing to fix the distance from the bridge. Once a suitable location is found, the construction depth is determined by analyzing and calculating the stress on the bridge and the construction location of the concrete monopile foundation 7. Different construction depths can bear the stress at different locations, avoiding the large footprint and high cost of gravity anchor foundations, as well as the fixed location distance in small-span terrain, which makes it impossible to construct at some locations and renders them unusable.

[0040] Connector 8 is fixed on the steel main tower 5 and is used to replace the saddle. The main span cable 4 and the hinged tie rod 6 are connected through connector 8, so that the tie rod 6 only bears the axial force and does not have to bear the bending moment. At the same time, the tension of the main span cable 4 can be transferred to the tie rod 6. This avoids the situation where the friction force provided by the saddle cannot balance the unbalanced horizontal force of the main span cable 4 when the span of the bridge side span is small, making it impossible to use the saddle and causing the force to be unbalanced.

[0041] In this embodiment, a channel 81 is provided in the connector 8. The free end of the main span cable 4 is connected to the channel 81 through an anchor head. The free end of the main span cable 4 can be inserted into the channel 81 through the channel 81. Then, the anchor head is used to fix it in the channel 81, so that the main span cable 4 can be connected to the steel main tower 5.

[0042] In this embodiment, one end of the tie rod 6 is hinged to the connector 8 via a hinge shaft. Through the hinge setting and cooperation with the steel main tower 5 which is also hinged, it is only subjected to axial tensile force and does not bear bending moment. A hinge seat 71 is provided on the concrete monopile foundation 7 of the tie rod 6, and the other end of the tie rod 6 is hinged to the hinge seat 71 via a hinge shaft.

[0043] In this embodiment, one end of the sling 3 is connected to the main span steel beam 2 by a pin, and the other end of the sling 3 is connected to the main span main cable 4 by a pin. The pin connection makes the sling 3 quick and efficient to install, and the structure stable with strong adaptability to deformation.

[0044] In this embodiment, the main steel tower 5 and the main span steel beam 2 are also hinged together by a hinge shaft. The hinged connection makes the force transmission direction of the main span steel beam 2 clearer, transmitting only axial force, avoiding the bending moment of the tie rod 6, and improving the resistance to unbalanced forces. Combined with the overall bridge structure and the installation of the tie rod 6, it is used to balance unbalanced forces.

[0045] In this embodiment, the pier 1 is a portal pier, the main span steel beam 2 is a steel plate beam with longitudinal and transverse beams, the suspension cable 3 is a sealed steel wire rope, the main steel tower 5 is a king-shaped steel structure, and the diagonal tie rod 6 is an I-shaped steel structure.

[0046] Taking this embodiment as an example, when constructing a bridge, the span arrangement is 11.29+49+9.44m, the center distance between the two piers is 44m, the bridge deck width is 6m, the transverse arrangement of the bridge deck is 0.3m railing + 5.4m sidewalk + 0.3m railing, the total transverse distance is 6m, the center distance between the piers is 11.372m, the piers are rectangular variable cross sections, the top of the pier is 1.2m×1.2m, the bottom of the pier is 1.8m×1.8m, the crossbeams are rectangular cross sections with a height of 1.2m×width of 1.0m, and the crossbeams are connected to the piers by a circular arc.

[0047] The main span steel beam 2 has a beam height of 0.482m. The main span steel beam 2 at the location of the suspension cable 3 has an outward-facing crossbeam with a width of 7m, and the beam width at the location where the suspension cable 3 is not located is 6.3m. The suspension cables 3 are arranged along the centerline normal of the main span steel beam 2, with a horizontal spacing of 2.65m-3.2m. The main span main cable 4 has a horizontal spacing of 12.142m at the top of the steel main tower 5 and a horizontal spacing of 8.373m at the mid-span. The longitudinal spacing at the top of the steel main tower 5 is 49m with a horizontal spacing of 12.142m, and the longitudinal spacing at the bottom of the tower is 44m with a horizontal spacing of 11.372m. The concrete single pile foundation 7 is a 2.5m × 3.5m rectangular bored pile.

[0048] In some alternative embodiments, see Figure 2 As shown, the concrete monopile foundations 7 located on the same side of the span are divided into two groups, and the number of concrete monopile foundations 7 in both groups is even. Each group of concrete monopile foundations 7 is hinged to the connector 8 at the top of the same steel main tower 5 through a tie rod 6.

[0049] In this embodiment, the same group of concrete monopile foundations 7 are symmetrically arranged along the extension direction of the main cable 4 of the main span, and the two groups of concrete monopile foundations 7 are symmetrically arranged about the central axis of the bridge body, with the attached... Figure 2For example, there are two concrete monopile foundations 7 at each steel main tower 5, arranged in a figure-eight shape and symmetrically along the extension direction of the main cable 4 of the main span. All the concrete monopile foundations 7 connected to each steel main tower 5 form a group. The two groups of concrete monopile foundations 7 on the two steel main towers 5 at the same side span are symmetrically arranged with respect to the central axis of the bridge body, and the concrete monopile foundations 7 at the same side span are distributed in a fan-shaped interval.

[0050] By symmetrically and evenly distributing the arrangement, the piers 1 and the main span cable 4 are subjected to uniform stress, and the force transmission is also uniform. Furthermore, the fan-shaped arrangement improves the bearing capacity and increases the overall stress-bearing area, thus avoiding uneven stress on individual piers and the main span cable 4, which would lead to a decrease in the strength of individual concrete pile foundations 7 and excessive stress on the main span cable 4.

[0051] See Figure 1-5 As shown, the second aspect of this application provides a construction method for a pedestrian suspension bridge employing a spatially combined chain anchoring system, comprising the following steps:

[0052] Step 101: When the construction of a suspension bridge is limited by the terrain in terms of span, first design the bridge according to the terrain and determine the location of the bridge construction. Then, find any position on the side span of the bridge where a concrete monopile foundation 7 can be placed. This position only needs to be able to place and arrange the concrete monopile foundation 7. Then, calculate the construction depth of the concrete monopile foundation 7 according to the location of the bridge and the location of the concrete monopile foundation 7 to ensure that the depth of the concrete monopile foundation 7 is sufficient to bear the axial tensile force of the bridge. In small-span terrain, gravity anchor foundations cannot be used. In this case, concrete monopile foundations 7 are used. Compared with gravity anchor foundations, they occupy less area, have lower cost, and can be placed in any position. Then, according to the stress calculation and analysis, the construction depth can be determined to meet the stress requirements.

[0053] Step 102: After determining the construction location of the concrete monopile foundation 7, begin constructing two piers 1 for support. On each of the two columns of each pier 1, construct a steel main tower 5. Install a connector 8 at the end of the steel main tower 5 away from the pier 1. Then, construct the concrete monopile foundation 7 in the designated location.

[0054] Step 103: There are two concrete monopile foundations 7 at each steel main tower 5, arranged in a figure-eight shape and symmetrically along the extension direction of the main span cable 4. All the concrete monopile foundations 7 connected to each steel main tower 5 form a group. The two groups of concrete monopile foundations 7 on the two steel main towers 5 on the same side span are symmetrically arranged with respect to the central axis of the bridge body. The concrete monopile foundations 7 on the same side span are also distributed in a fan-shaped interval. Through the symmetrical and distributed arrangement, the piers 1 and the main span cable 4 are subjected to uniform force, and the force transmission is also uniform. The fan-shaped arrangement improves the bearing capacity and increases the overall bearing area, avoiding uneven force on individual piers and the main span cable 4, which would reduce the strength of individual concrete monopile foundations 7 and cause the main span cable 4 to bear too much force. After the concrete monopile foundations 7 are constructed, one end of the tie rod 6 is connected to the concrete monopile foundation 7 through the hinge seat 71, and the other end is hinged to the connector 8.

[0055] Step 104: Next, continue laying the main span cable 4, then lay the suspension cable 3 on the main span cable 4, and finally lay the main span steel beam 2 between the two piers 1 and connect the main span steel beam 2 with the suspension cable 3 to complete the bridge construction.

[0056] The working process and working principle of this application:

[0057] When constructing a bridge in a terrain-constrained environment, where the side spans are small, a concrete monopile foundation (7) can be used as the anchorage foundation. The concrete monopile foundation (7) has a small footprint and is not limited by the span, allowing it to be constructed at any location. Only the stress analysis of the bridge and the concrete monopile foundation (7) needs to be calculated to determine the required depth to meet the bridge's stress requirements. This avoids the problems associated with conventional gravity anchorage foundations, which require a large footprint, are difficult to locate in terrain-constrained environments, and have fixed side span distances that limit construction locations.

[0058] There are two concrete monopile foundations 7 at each steel main tower 5, arranged in a figure-eight shape and symmetrically along the extension direction of the main span cable 4. All the concrete monopile foundations 7 connected to each steel main tower 5 form a group. The two groups of concrete monopile foundations 7 on the two steel main towers 5 on the same side span are symmetrically arranged with respect to the central axis of the bridge body. The concrete monopile foundations 7 on the same side span are also distributed in a fan-shaped interval. Through the symmetrical and distributed arrangement, the piers 1 and the main span cable 4 are subjected to uniform stress, and the force transmission is also uniform. The fan-shaped arrangement improves the bearing capacity and increases the overall stress area, avoiding uneven stress on individual piers and the main span cable 4, which would reduce the stress strength of individual concrete monopile foundations 7 and cause the main span cable 4 to bear too much force. After the concrete monopile foundations 7 are constructed, one end of the tie rod 6 is connected to the concrete monopile foundation 7 through the hinge seat 71, and the other end is hinged to the connector 8.

[0059] Meanwhile, the tie rod 6 is connected to the steel main tower 5 through the connector 8, and the tie rod 6 and the connector 8 are hinged, so that the tie rod 6 only bears axial force and not bending moment. The connection between the steel main tower 5 and the pier 1 is also hinged, so that the force transmission direction of the steel main tower 5 is clear. Through the overall structure setting, and by using the connector 8, the hinged steel main tower 5 and the tie rod 6, the problem of not being able to use the saddle to balance the unbalanced force when the span is small is solved.

[0060] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0061] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pedestrian suspension bridge employing a spatially combined chain anchoring system, characterized in that: include The main body of the bridge includes a pier (1) and two steel main towers (5) hinged to the top of the pier (1) and arranged symmetrically. The top of the steel main towers (5) is provided with a connector (8) for anchoring the main cable (4) of the main span. Concrete monopile foundation (7), wherein multiple concrete monopile foundations (7) are provided and distributed in a fan-shaped interval on the side span of the main body of the bridge; A tie rod (6) is hinged between a concrete monopile foundation (7) and a connector (8) to transfer the axial tensile force of the bridge body to the concrete monopile foundation (7). The concrete single pile foundations (7) located on the same side of the span are divided into two groups, and the number of concrete single pile foundations (7) in both groups is even. Each group of concrete single pile foundations (7) is hinged to the connector (8) at the top of the same steel main tower (5) through a tie rod (6). The same set of concrete monopile foundations (7) are symmetrically arranged along the extension direction of the main cable (4) of the main span, and the two sets of concrete monopile foundations (7) are symmetrically arranged with respect to the central axis of the main body of the bridge. The connector (8) has a channel (81) inside, and the free end of the main span cable (4) is connected to the channel (81) through an anchor head.

2. The pedestrian suspension bridge employing a spatially combined chain anchoring system as described in claim 1, characterized in that: A hinge seat (71) is provided on the concrete monopile foundation (7), and the end of the tie rod (6) away from the connector (8) is hinged to the hinge seat (71) through the hinge shaft.

3. The pedestrian suspension bridge employing a spatially combined chain anchoring system as described in claim 1, characterized in that: The main body of the bridge also includes a main span steel beam (2) set on the pier (1), a main span cable (4) set above the pier (1) and connected to the steel main tower (5), and a suspender (3) set between the main span steel beam (2) and the main span cable (4). There are two piers (1), and the main span steel beam (2) is set across the two piers (1). The main span cable (4) is connected to the steel main tower (5) through a connector (8).

4. The pedestrian suspension bridge employing a spatially combined chain anchoring system as described in claim 3, characterized in that: There are several slings (3), and the several slings (3) are arranged linearly at equal intervals along the length direction of the main span steel beam (2).

5. The pedestrian suspension bridge employing a spatially combined chain anchoring system as described in claim 4, characterized in that: One end of the sling (3) is connected to the main span steel beam (2) by a pin; The other end of the sling (3) is connected to the main cable (4) of the main span by a pin.

6. The pedestrian suspension bridge employing a spatially combined chain anchoring system as described in claim 3, characterized in that: The pier (1) is a portal pier, the main span steel beam (2) is a steel plate beam with longitudinal and transverse beams, the suspension cable (3) is a sealed steel wire rope, the main steel tower (5) is a king-shaped steel structure, and the tie rod (6) is an I-shaped steel structure.

7. A construction method for a pedestrian suspension bridge employing a spatially combined chain anchorage system, wherein the method uses the pedestrian suspension bridge employing the spatially combined chain anchorage system as described in any one of claims 1-6, characterized in that: When the construction of a suspension bridge is limited by the terrain, the bridge is first designed according to the terrain and the location of the bridge is determined. Then, any location where a concrete monopile foundation (7) can be placed is found at the side span of the bridge. Then, the construction depth of the concrete monopile foundation (7) is calculated according to the location of the bridge and the location of the concrete monopile foundation (7) to ensure that the concrete monopile foundation (7) can bear the axial tension of the bridge. After determining the construction depth of the concrete monopile foundation (7), the construction of two piers (1) for support is started. A steel main tower (5) is built on the top of the two columns of each pier (1). A connector (8) is set at the end of the steel main tower (5) away from the pier (1). Then the concrete monopile foundation (7) is built in the designated position. There are an even number of concrete monopile foundations (7) at each side span of the steel main tower (5), and they are symmetrically arranged along the extension direction of the main cable (4) of the main span. The concrete monopile foundations (7) at the two steel main towers (5) on the same side span are distributed in a fan-shaped interval. After the concrete monopile foundations (7) are constructed, one end of the tie rod (6) is connected to the concrete monopile foundation (7) through the hinge seat (71), and the other end is hinged to the connector (8). Next, continue to lay the main span cable (4), then lay the suspenders (3) on the main span cable (4), and finally lay the main span steel beam (2) between the two piers (1) and connect the main span steel beam (2) with the suspenders (3) to complete the bridge construction.

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