Suspender bridge main cable structure of an unanchored system, suspension bridge and method

Abstract

The application discloses a kind of suspension bridge main cable structure of unanchored system, suspension bridge and method, solve the problems that the end anchoring surface of prior art suspension bridge faces big anchor chamber space, there is easy to crack, the problem that dehumidification anticorrosion is difficult, with the cable force of main cable is anchored in anchor body by rotation mode, substantially reduce the risk of anchor body cracking, reduce the beneficial effects of material for anchoring, specific scheme is as follows: a kind of suspension bridge main cable structure of unanchored system, including upstream main cable and downstream main cable, the two ends of upstream main cable and downstream main cable are connected respectively, so that upstream main cable and downstream main cable are connected into annular structure, the connecting place of the two ends of upstream main cable and downstream main cable is set through anchor body respectively, anchor body is fixed with cable saddle assembly, cable saddle assembly includes multiple cable saddles, the end side of upstream main cable, downstream main cable and the connecting place of the two are through cable saddle assembly, realize the rotation of the connecting place of upstream main cable and downstream main cable to anchor main cable structure in anchor body.

Description

Technical Field

[0001] This invention relates to the field of suspension bridge main cable technology, and in particular to a suspension bridge main cable structure, suspension bridge and method without anchorage system. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Suspension bridges are favored for their strong spanning capacity. In order to solve the problem of excessive cable force stress concentration, the main cable of a traditional suspension bridge, whether using the precast strand method or the AS spinning method (aerial spinning method), needs to be spatially distributed in the front anchor chamber. The main cable wires are connected to the anchoring units in the anchor chamber by a certain number of basic units and steel tie rods, thereby effectively ensuring that the tension of the main cable is transmitted to the anchor.

[0004] Traditional main cable anchoring methods require the anchorage to provide a large space anchor chamber to meet the cable release needs. The amount of concrete required to form a large space anchor chamber is large, resulting in higher costs. The main cable is spread out for anchoring, resulting in multiple anchoring points in the anchor chamber, which poses a risk of cracking to the anchor chamber. Main cable anchoring requires a large number of anchoring rods, anchoring systems, and supports. The additional material consumption due to wire anchoring leads to the low economic efficiency of existing anchoring methods. Moreover, because the steel wires are anchored separately in the anchor chamber, the corrosion prevention of the main cable steel wires is more difficult and the maintenance cost is higher. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a suspension bridge main cable structure without an anchoring system. It adopts a full-rotation, self-balancing main cable arrangement, eliminating the existing anchoring system. At the same time, the main cables pass through in a concentrated manner, eliminating the need for scattered anchoring, which greatly reduces the difficulty of dehumidification and corrosion prevention of the main cables and reduces maintenance costs.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A suspension bridge main cable structure without an anchoring system includes an upstream main cable and a downstream main cable. The two ends of the upstream and downstream main cables are connected to form a ring structure. The connection points of the upstream and downstream main cables are respectively set through anchor bodies. A cable saddle assembly is fixed in the anchor body. The cable saddle assembly includes multiple cable saddles. The ends of the upstream and downstream main cables and their connection points are connected through the cable saddle assembly, which enables the rotation of the connection points of the upstream and downstream main cables, thereby anchoring the main cable structure to the anchor body.

[0007] As described above, in a suspension bridge main cable structure without an anchoring system, the cable saddle assembly includes a slewing main cable saddle and a rotating cable saddle. The rotating cable saddles are placed on both sides of the slewing main cable saddle within the same anchor body. The upstream main cable passes through one rotating cable saddle in the anchor body, and the downstream main cable passes through another rotating cable saddle in the anchor body. The connection between the upstream and downstream main cables passes through the slewing main cable saddle.

[0008] In the suspension bridge main cable structure without an anchoring system as described above, the angle between the slewing saddle and the slewing main cable saddle within the same anchor body is set at a certain interval.

[0009] As described above, in the main cable structure of a suspension bridge without an anchoring system, two cable saddles in the anchor bodies at one end of the upstream and downstream main cables are symmetrically arranged about the bridge axis. The slewing main cable saddles at both ends of the upstream main cable are symmetrically arranged about the centerline of the bridge in the longitudinal direction.

[0010] As described above, in a suspension bridge main cable structure without an anchoring system, the cable saddle at the same anchor body is located near the center point of the upstream or downstream main cable. The upstream and downstream main cables are respectively located through the main cable saddle at the top of the main tower. The starting point of the upstream main cable passing through the cable saddle is on the same plane as the main cable saddle at the top of the main tower.

[0011] As described above, in the main cable structure of a suspension bridge without an anchoring system, the anchor bodies at both ends of the upstream and downstream main cables are symmetrically arranged about the centerline of the bridge's longitudinal direction.

[0012] As described above, in a suspension bridge main cable structure without an anchoring system, a groove is provided on the top surface of the anchor body, and the cable saddle is installed in the groove. The ends of the upstream and downstream main cables enter the groove and then pass through the cable saddle assembly. The width of the groove is greater than the width of the cable saddle assembly to facilitate human walking.

[0013] As described above, in the main cable structure of a suspension bridge without an anchorage system, the ends of all steel wires in the upstream main cable and the ends of all steel wires in the downstream main cable are connected by connecting sleeves. The connection by connecting sleeves ensures the reliability of the connection between the upstream and downstream main cables. The connecting sleeves are set to avoid the cable saddle, which facilitates the smooth passage of the upstream and downstream main cables through the cable saddle and ensures the reliability of the connecting sleeves. The connecting sleeves at the connection points of adjacent steel wires are staggered to avoid the connection point of the upstream and downstream main cables being too large.

[0014] Secondly, the present invention also provides a suspension bridge, including a bridge deck and a main cable structure of a suspension bridge without an anchoring system, wherein the anchor is located below the bridge deck.

[0015] Thirdly, the present invention also provides a construction method for the main cable structure of a suspension bridge without an anchoring system, comprising the following: Anchors are installed at both ends of the suspension bridge; A cable saddle assembly is fixed in the anchor body. The cable saddle assembly includes multiple cable saddles. The upstream and downstream main cables pass through the main tower and then arrive at the anchor body. The ends of the upstream and downstream main cables and their connection points are connected by cable saddle components, which enable the rotation of the connection points between the upstream and downstream main cables, thereby anchoring the main cable structure to the anchor body.

[0016] The beneficial effects of the present invention are as follows: 1) In this invention, the upstream and downstream main cables are connected at both ends, forming a ring structure. This creates a rotating main cable structure. The main cable structure is anchored to the anchor body via a saddle, thus forming a self-balancing main cable structure. This eliminates the need for the existing anchoring system. The main cables pass through the rotating point without needing to be spread out for anchoring, eliminating the need for large anchor chambers. This effectively controls the amount of concrete used for anchor chamber formation and reduces construction costs.

[0017] 2) The main cable structure provided by the present invention does not require multiple anchoring points. The overall ring structure makes the steel wires in the main cable self-balanced under stress, reducing the risk of anchor body cracking. It effectively reduces the amount of anchoring materials used in existing anchoring systems, significantly reduces the difficulty of dehumidifying and preventing corrosion of the main cable and anchor chamber, and effectively controls maintenance costs.

[0018] 3) In this invention, a slewing main cable saddle and a rotating cable saddle are provided in the anchor body. The rotating cable saddle is placed on both sides of the slewing main cable saddle. The upstream main cable passes through one rotating cable saddle in the anchor body, and the downstream main cable passes through another rotating cable saddle in the anchor body. The connection between the two main cables is through the slewing main cable saddle, which effectively adjusts the direction of the upstream and downstream main cables, ensuring the smooth rotation of the main cable structure. Moreover, through the setting of the slewing main cable saddle and the two rotating cable saddles, the anchor body is in a triaxial compression state, which further reduces the risk of anchor body cracking.

[0019] 4) In this invention, the anchor body is provided with a groove, which facilitates the installation of the cable saddle assembly. The width of the groove is greater than the width of the cable saddle assembly to facilitate the movement of workers and to facilitate the maintenance of the cable saddle assembly.

[0020] 5) In this invention, the steel wires at the ends of the upstream and downstream main cables are connected by connecting sleeves. The connecting sleeves are set away from the cable saddle to facilitate the smooth passage of the upstream and downstream main cables through the cable saddle and ensure the reliability of the connecting sleeves. The connecting sleeves at the connection points of adjacent steel wires are staggered to avoid the connection points of the upstream and downstream main cables being too large.

[0021] 6) The suspension bridge provided by this invention has an anchor body placed below the bridge deck and fixedly connected to the bridge deck, realizing the extension and rotation of the main cable. The main cable is in the shape of a ring, and the cable force is pressed tightly at the anchor body by the cable saddle to realize the anchoring of the main cable. The entire suspension bridge does not need to set up a complex anchor chamber, eliminating the conventional main cable anchoring system of suspension bridges. There is no need to set up a separate anchor end. The tensile strength of the main cable is optimized to a ring compression anchoring, which makes the main cable structure more stable and significantly reduces the risk of anchor body cracking. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic elevation view of the main cable structure of a suspension bridge with an anchorless system according to one or more embodiments of the present invention.

[0024] Figure 2 This is a plan view of the main cable structure of a suspension bridge with an anchorless system according to one or more embodiments of the present invention.

[0025] Figure 3 This is a schematic diagram of the grooved anchor body in the main cable structure of a suspension bridge with an anchorless system according to one or more embodiments of the present invention.

[0026] Figure 4 This is a schematic diagram of a cable saddle assembly installed in the anchor body of a suspension bridge main cable structure without anchorage, according to one or more embodiments of the present invention.

[0027] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0028] Among them: 1. Upstream main cable, 2. Main cable saddle, 3. Slewing main cable saddle, 4. Slewing cable saddle, 5. Bridge axis, 6. Main tower centerline, 7. Anchor body, 8. Groove, 9. Main cable centerline, 10. Downstream main cable. Detailed Implementation

[0029] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. As introduced in the background section, in order to solve the problems of large anchor chamber space, large material consumption, difficulty in dehumidification, and difficulty in corrosion prevention of main cable steel wire caused by the spread anchoring of the main cable, the present invention proposes a suspension bridge main cable structure without anchoring system.

[0031] Example 1 In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, a suspension bridge main cable structure without an anchoring system includes an upstream main cable 1 and a downstream main cable 10. Both the upstream and downstream main cables 1 and 10 are erected using the AS spinning method. The two ends of the upstream and downstream main cables 1 and 10 are connected to form a ring structure. The connection points of the upstream and downstream main cables 1 and 10 are respectively set through anchor bodies 7. A cable saddle assembly is fixed inside the anchor body 7. The cable saddle assembly includes multiple cable saddles. The ends of the upstream and downstream main cables 1 and 10 and their connection points are connected through the cable saddle assembly, which enables the rotation at the connection point of the upstream and downstream main cables 1 and 10, thereby anchoring the main cable structure to the anchor body 7. That is, the main cable structure uses the cable saddle assembly to press the cable force of the main cable to the anchor body 7, which can prevent the steel wires from spreading out for anchoring. The main cable structure is quickly anchored in a bundle form with the help of the cable saddle.

[0032] It should be explained that upstream main cable 1 refers to the main cable located upstream of downstream main cable 10, or the main cable located upstream along the flow direction of the river.

[0033] The overall main cable structure is arranged in a ring (the main cable structure is ring-shaped in plan), which has self-balancing mechanical properties. The internal steel wires of the main cable structure have self-balancing tension, which optimizes the tensile anchorage of the main cable to a ring compression anchorage, improving the crack resistance of the anchor body 7. The whole structure is a suspension bridge without an anchorage system, eliminating the anchorage system of the main cable of conventional suspension bridges, that is, eliminating the main cable anchorage tie rod and anchorage system, optimizing the maintenance difficulty of suspension bridges, improving the durability of the main cable structure, and reducing operational risks.

[0034] It should be noted that the ends of all steel wires in the upstream main cable 1 and the ends of all steel wires in the downstream main cable 10 are connected by connecting sleeves to extend the steel wires. The connecting sleeves are existing steel wire sleeves, eliminating the need for separate anchoring ends. The connection through connecting sleeve 1 ensures the reliability of the connection between the upstream and downstream main cables. The connecting sleeves are positioned to avoid the cable saddle assembly, facilitating the smooth passage of the upstream and downstream main cables through the cable saddle and ensuring the reliability of the connecting sleeves. The connecting sleeves at the connection points of adjacent steel wires are staggered to prevent any section at the connection point of the upstream main cable 1 and the downstream main cable 10 from becoming too large. The connecting sleeves enable the extension and rotation of the main cable structure. The main cable structure is ring-shaped, and the cable force is pressed onto the anchor body 7 by the rotating cable saddle 4 and the rotating main cable saddle 3 to achieve the anchoring of the main cable.

[0035] refer to Figure 2 As shown, the cable saddle assembly includes a slewing main cable saddle 3 and a rotating cable saddle 4. Within the same anchor body 7, the rotating cable saddle 4 is placed on both sides of the slewing main cable saddle 3. The upstream main cable 1 passes through one rotating cable saddle 4 in the anchor body 7, and the downstream main cable 10 passes through another rotating cable saddle 4 in the anchor body 7. The connection between the upstream main cable 1 and the downstream main cable 10 passes through the slewing main cable saddle 3. The rotating cable saddle 4 and the slewing main cable saddle 3 within the same anchor body 7 are set at a set angle. The slewing main cable saddle 3 and the rotating cable saddle 4 in the same anchor body 7 form three points of a triangle, with the slewing main cable saddle 3 at the center position. The slewing main cable saddle 3 is arranged along the direction of the bridge axis 5.

[0036] The anchor bodies at both ends of the upstream main cable 1 and the downstream main cable 10 are symmetrically arranged about the centerline of the bridge in the longitudinal direction. The two cable saddles 4 in the anchor bodies 7 at one end of the upstream main cable 1 and the downstream main cable 10 are symmetrically arranged about the bridge axis 5. The slewing cable saddles 3 at both ends of the upstream main cable 1 are symmetrically arranged about the centerline of the bridge in the longitudinal direction.

[0037] In addition, the transfer saddle 4 in the same anchor body 7 is set near the center point of the main cable length direction (near the center line 6 of the main tower). The upstream main cable 1 and the downstream main cable 10 are respectively set through the main cable saddle 2 at the top of the main tower. The starting point of the upstream main cable passing through the transfer saddle 4 is on the same plane as the main cable saddle 2 at the top of the main tower.

[0038] It is easy to understand that reference Figure 3 and Figure 4As shown, a U-shaped groove 8 is provided on the top surface of the anchor body 7. A cable saddle assembly is installed in the groove 8, and a rotating cable saddle 4 is placed inside the groove. The center line 9 of the main cable is set along the side of the groove 8. The rotating cable saddle 4 is spaced apart from the end of the groove, so that the upstream main cable 1 and the downstream main cable 10 first enter the side of the groove 8 in a straight line, and then rotate through the cable saddle assembly. The groove 8 also facilitates the installation of the cable saddle assembly. The ends of the upstream main cable 1 and the downstream main cable 10 enter the groove and then pass through the cable saddle assembly. The width of the groove 8 is greater than the width of the rotating cable saddle 4 and the rotating main cable saddle 3 to facilitate the movement of people and to facilitate the maintenance of the cable saddle assembly in the groove 8 by the operators. The anchor body can be anchored to a gravity anchor, a U-shaped anchor hole in the mountain, or the end of the main beam.

[0039] In the main cable structure provided in this embodiment, the steel wires at the ends of the upstream main cable 1 and the downstream main cable 10 are connected by connecting sleeves, which enables the internal force of the main cable steel wires to be self-balanced. Traditional suspension bridges transfer the cable force to the anchor body through anchoring rods, eliminating the need for a large anchor chamber and effectively controlling the amount of concrete used for anchor chamber formation, thus controlling construction costs. The main cable structure provided in this embodiment has no anchoring system. The cable force is anchored to the anchor body 7 by rotation. The anchor body 7 is under triaxial compression, which greatly reduces the risk of cracking of the anchor body 7 and solves the problems of high difficulty in dehumidification and corrosion prevention and high material consumption faced by the main cable spreading anchoring.

[0040] Example 2 This embodiment provides a suspension bridge, including a bridge deck and a main cable structure of a suspension bridge without an anchoring system as described in Embodiment 1, with the anchor 7 placed below the bridge deck.

[0041] The suspension bridge main cable structure provided in this embodiment can be applied to single-span or multi-span suspension bridges, as well as single-tower or multi-tower suspension bridges. The space required for the main cable rotation anchorage is small, and the difficulty of dehumidification and maintenance of the anchor chamber is greatly reduced, thus improving the durability of the suspension bridge.

[0042] Example 3 A construction method for the main cable structure of a suspension bridge without an anchoring system includes the following: Anchor bodies 7 are installed at both ends of the suspension bridge. Anchor bodies 7 can be anchored to gravity anchors, U-shaped anchor holes in the mountain, or the ends of the main beam. The cable saddle assembly is fixed in the groove 8 of the anchor body 7. The cable saddle assembly includes a slewing main cable saddle 3 and a rotating cable saddle 4. The rotating cable saddle is placed on both sides of the slewing main cable saddle in the same anchor body 7. The upstream main cable 1 and the downstream main cable 10 pass through the main cable saddle 2 at the top of the main tower and then arrive at the anchor body 7. The ends of the upstream main cable 1 and the downstream main cable 10 pass through the slewing saddle 4. The ends of the steel wires in the upstream main cable 1 and the downstream main cable 10 are connected by a connecting sleeve. The connection point of the upstream main cable 1 and the downstream main cable 10 passes through the slewing main cable saddle 3. The connecting sleeve is set to avoid the slewing main cable saddle 3, so as to realize the slewing at the connection point of the upstream main cable and the downstream main cable, thereby anchoring the main cable structure to the anchor body.

[0043] The construction method provided in this embodiment eliminates the anchoring system of suspension bridges, resulting in outstanding economic efficiency, high reliability, mature and reliable construction methods, and convenient and feasible construction.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A suspension bridge main cable structure without an anchoring system, characterized in that, The structure includes an upstream main cable and a downstream main cable, with their ends connected to form a ring structure. The connection points of the upstream and downstream main cables are respectively set through anchor bodies, and cable saddle assemblies are fixed in the anchor bodies. The cable saddle assemblies include multiple cable saddles. The ends of the upstream and downstream main cables and their connection points pass through the cable saddle assemblies, realizing the rotation at the connection points of the upstream and downstream main cables, thereby anchoring the main cable structure to the anchor body. The cable saddle assembly includes a slewing main cable saddle and a rotating cable saddle. The rotating cable saddles in the anchor body are placed on both sides of the slewing main cable saddle. The upstream main cable passes through one rotating cable saddle in the anchor body, and the downstream main cable passes through another rotating cable saddle in the anchor body. The connection points of the upstream and downstream main cables pass through the slewing main cable saddle. The slewing main cable saddle and the rotating cable saddle in the same anchor body form three points of a triangle, with the slewing main cable saddle at the center position. The slewing main cable saddle is arranged along the direction of the bridge axis. The ends of all steel wires in the upstream main cable and the ends of all steel wires in the downstream main cable are connected by connecting sleeves, which are set away from the cable saddle, and the connecting sleeves at the connection points of adjacent steel wires are staggered. The top surface of the anchor body is provided with a groove, which is U-shaped. A cable saddle assembly is installed in the groove, and the cable saddle is placed inside the groove. The upstream and downstream main cables first enter the side of the groove in a straight line, and then turn around after passing through the cable saddle assembly. The ends of the upstream and downstream main cables enter the groove and then pass through the cable saddle assembly. The width of the groove is greater than the width of the cable saddle assembly.

2. The main cable structure of a suspension bridge without an anchorage system according to claim 1, characterized in that, Within the same anchor body, the angle between the slewing saddle and the slewing main saddle has a set included angle.

3. The main cable structure of a suspension bridge without an anchorage system according to claim 1, characterized in that, The two cable saddles in the anchor bodies at one end of the upstream main cable and the downstream main cable are symmetrically arranged about the bridge axis; The slewing main cable saddles at both ends of the upstream main cable are symmetrically arranged about the centerline of the bridge in the longitudinal direction.

4. The main cable structure of a suspension bridge without an anchorage system according to claim 1, characterized in that, The cable saddle at the same anchor body is set near the center point of the upstream main cable or the downstream main cable. The upstream and downstream main cables are respectively set through the main cable saddle at the top of the main tower. The starting point of the upstream main cable passing through the cable saddle is on the same plane as the main cable saddle at the top of the main tower.

5. The main cable structure of a suspension bridge without an anchorage system according to claim 1, characterized in that, The anchors at both ends of the upstream and downstream main cables are symmetrically arranged about the centerline of the bridge in the longitudinal direction.

6. A suspension bridge, comprising a bridge deck and a main cable structure of a suspension bridge without an anchorage system as described in any one of claims 1-5, wherein the anchor is located below the bridge deck.

7. A construction method for the main cable structure of a suspension bridge without an anchorage system according to any one of claims 1-5, characterized in that, Includes the following: Anchors are installed at both ends of the suspension bridge; Secure the cable saddle assembly within the anchor body; The upstream and downstream main cables pass through the main tower and then arrive at the anchor body. The ends of the upstream and downstream main cables and their connection points are connected by cable saddle components, which enable the rotation of the connection points between the upstream and downstream main cables, thereby anchoring the main cable structure to the anchor body.

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