Suspension bridge main cable structure without anchoring system, suspension bridge and method

Abstract

The invention discloses a suspension bridge main cable structure without an anchoring system, a suspension bridge and a method and solves the problems that in the prior art, an end anchoring face of a suspension bridge is large in anchor chamber space, prone to cracking and large in dehumidification and corrosion prevention difficulty. According to the specific scheme, the suspension bridge main cable structure without the anchoring system comprises an upstream main cable and a downstream main cable, the two ends of the upstream main cable are connected with the two ends of the downstream main cable respectively, and therefore the upstream main cable and the downstream main cable are connected to form an annular structure; the connecting positions of the two ends of the upstream main cable and the downstream main cable are arranged through anchor bodies, cable saddle assemblies are fixed into the anchor bodies and comprise multiple cable saddles, the end sides of the upstream main cable and the downstream main cable and the connecting positions of the end sides of the upstream main cable and the downstream main cable pass through the cable saddle assemblies, rotation of the connecting positions of the upstream main cable and the downstream main cable is achieved, and therefore the main cable structure is anchored to the anchor bodies.

Description

Technical Field

[0001] The present invention relates to the technical field of suspension bridge main cables, in particular to a suspension bridge main cable structure without an anchoring system, a suspension bridge and a method. Background Art

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

[0003] Suspension bridges are highly favored for their powerful spanning capacity. Whether the main cables of traditional suspension bridges are constructed using the prefabricated strand method or the AS spinning method (aerial spinning), in order to solve the problem of excessive cable force concentration, the main cables need to be spatially spread in the front anchor chamber. The main cable steel wires are organized into a certain number of basic units, which are connected by steel pull rods and anchor units in the anchor chamber, thereby effectively ensuring that the main cable tension is transmitted to the anchor.

[0004] Traditional main cable anchoring methods require a large anchor chamber to accommodate the cable release. Larger anchor chambers require a larger amount of concrete, leading to higher costs. The main cables are anchored in a spread-out manner, resulting in multiple anchoring points in the anchor chamber, which poses a risk of cracking. Main cable anchoring requires a large number of anchor rods, anchoring systems, and brackets. The additional material consumption associated with steel wire anchoring leads to low economic efficiency in existing anchoring methods. Moreover, because the steel wires are anchored separately in the anchor chamber, it is difficult to prevent corrosion of the main cable steel wires and the maintenance cost is high. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a main cable structure of a suspension bridge without an anchoring system. It adopts a fully rotating, self-balancing main cable layout, eliminates the existing anchoring system, and at the same time, the main cables pass through in a concentrated manner without the need for scattered anchoring, which greatly reduces the difficulty of dehumidification and anti-corrosion of the main cables and reduces maintenance costs.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions: A main cable structure of a suspension bridge without an anchoring system includes an upstream main cable and a downstream main cable. The two ends of the upstream main cable and the downstream main cable are respectively connected so that the upstream main cable and the downstream main cable are connected to form a ring structure. The connection points at the two ends of the upstream main cable and the downstream main cable are respectively set through anchor bodies. A saddle assembly is fixed in the anchor body. The saddle assembly includes multiple saddles. The end sides of the upstream main cable and the downstream main cable and the connection between the two pass through the saddle assembly to realize the rotation of the connection point between the upstream main cable and the downstream main cable, thereby anchoring the main cable structure to the anchor body.

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

[0008] In the main cable structure of a suspension bridge without an anchoring system as described above, the rotating cable saddle and the rotating main cable saddle in the same anchor body are arranged at a set angle.

[0009] In the above-mentioned main cable structure of a suspension bridge without an anchoring system, the two turning 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 revolving main saddles at both ends of the upstream main cable are symmetrically arranged about the center line in the longitudinal direction of the bridge.

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

[0011] In the main cable structure of a suspension bridge without an anchoring system as described above, the anchor bodies at both ends of the upstream main cable and the downstream main cable are symmetrically arranged with respect to the center line in the longitudinal direction of the bridge.

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

[0013] According to the main cable structure of a suspension bridge without an anchoring system as described above, the ends of all the steel wires in the upstream main cable and the ends of all the steel wires in the downstream main cable are respectively connected through connecting sleeves. The reliability of the connection between the upstream main cable and the downstream main cable is ensured by the connection through the connecting sleeve. The setting of the connecting sleeve avoiding the saddle is conducive to the smooth passage of the upstream main cable and the downstream main cable through the saddle, thereby ensuring the reliability of the setting of the connecting sleeve. The connecting sleeves at the connection of two adjacent steel wires are staggered to avoid the connection between the upstream main cable and the downstream main cable being too large.

[0014] In a second aspect, the present invention further provides a suspension bridge comprising a bridge deck and the main cable structure of a suspension bridge without an anchoring system, wherein the anchor body is placed below the bridge deck.

[0015] In a third aspect, the present invention further provides a construction method for a main cable structure of a suspension bridge without an anchoring system, comprising the following contents: Anchor bodies are set at both ends of the suspension bridge; A saddle assembly is fixed in the anchor body, wherein the saddle assembly includes a plurality of saddles; The upstream main cable and the downstream main cable pass through the main tower respectively and then arrive at the anchor body. The end sides of the upstream main cable and the downstream main cable and the connection between the two pass through the saddle assembly to realize the rotation of the connection between the upstream main cable and the downstream main cable, thereby anchoring the main cable structure to the anchor body.

[0016] The beneficial effects of the present invention are as follows: 1) In the present invention, the upstream main cable and the downstream main cable are connected at both ends to form a ring structure. In this way, the main cable structure forms a rotary structure. The main cable structure passes through a saddle, which is installed on the anchor body, thereby anchoring the main cable structure to the anchor body. In this way, a self-balancing main cable structure is formed as a whole, eliminating the existing anchoring system. The main cables pass through the rotary point in a centralized manner and do not need to be dispersed for anchoring. A large anchor chamber is not required, which effectively controls the amount of concrete used to form the anchor chamber and controls construction costs.

[0017] 2) The main cable structure provided by the present invention does not require multiple anchoring points. The overall annular structure enables the stress on the steel wires in the main cable to be in a self-balanced state, reducing the risk of cracking of the anchor body; It effectively reduces the anchoring materials used in existing anchoring, greatly reduces the difficulty of dehumidification and anti-corrosion of the main cable and anchor chamber, and effectively controls maintenance costs.

[0018] 3) In the present invention, a rotating main cable saddle and a rotating cable saddle are provided in the anchor body. The rotating cable saddles are placed on both sides of the rotating 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 and contact of the two main cables pass through the rotating main cable saddle, which effectively adjusts the direction of the upstream main cable and the downstream main cable to ensure the smooth rotation of the main cable structure. In addition, through the arrangement of the rotating main cable saddle and the two rotating cable saddles, the anchor body is in a three-way compression state, further reducing the risk of anchor body cracking.

[0019] 4) In the present invention, a groove is provided on the anchor body to facilitate installation of the saddle assembly. The width of the groove is greater than the width of the saddle assembly to facilitate walking by operators and maintenance of the saddle assembly by operators.

[0020] 5) In the present invention, the end steel wires of the upstream main cable and the downstream main cable are connected by a connecting sleeve. The setting of the connecting sleeve away from the saddle facilitates the smooth passage of the upstream main cable and the downstream main cable through the saddle, ensuring the reliability of the setting of the connecting sleeve. The connecting sleeves at the connection of two adjacent steel wires are staggered to avoid the connection between the upstream main cable and the downstream main cable being too large.

[0021] 6) In the suspension bridge provided by the present invention, the anchor body is placed below the bridge deck and is fixedly connected to the bridge deck to realize the extension and rotation of the main cable. The main cable is ring-shaped, and the cable force is pressed against the anchor body by the saddle to realize the anchoring of the main cable. The entire suspension bridge does not require a complex anchor chamber, and the main cable anchoring system of a conventional suspension bridge is eliminated. There is no need to set up a separate anchor end. The main cable tensile strength is optimized to a ring-shaped extrusion anchorage, which has a higher structural stability of the main cable and greatly reduces the risk of anchor body cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a schematic elevation view of a main cable structure of a suspension bridge without an anchoring system according to one or more embodiments of the present invention.

[0024] Figure 2 It is a schematic plan view of a main cable structure of a suspension bridge without an anchoring system according to one or more embodiments of the present invention.

[0025] Figure 3 It is a schematic diagram of providing a groove for an anchor body in a main cable structure of a suspension bridge without an anchoring system according to one or more embodiments of the present invention.

[0026] Figure 4 It is a schematic diagram of a saddle assembly provided in an anchor body in a main cable structure of a suspension bridge without an anchoring system according to one or more embodiments of the present invention.

[0027] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

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

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

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations; As introduced in the background technology, in order to solve the problems of large anchor chamber space, large material consumption, difficulty in dehumidification, and difficulty in corrosion protection of main cable steel wire caused by the scattered anchoring of the main cable in the existing technology, in order to solve the above technical problems, the present invention proposes a suspension bridge main cable structure without an anchoring system.

[0031] Example 1 In a typical embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, a main cable structure of a suspension bridge without an anchoring system includes an upstream main cable 1 and a downstream main cable 10. The upstream main cable 1 and the downstream main cable 10 are both installed by the AS spinning method. The two ends of the upstream main cable 1 and the downstream main cable 10 are connected respectively, so that the upstream main cable 1 and the downstream main cable 10 are connected into a ring structure. The connection points of the two ends of the upstream main cable 1 and the downstream main cable 10 are respectively set through the anchor body 7. A saddle assembly is fixed in the anchor body 7. The saddle assembly includes multiple saddles. The end sides of the upstream main cable 1 and the downstream main cable 10 and the connection between the two pass through the saddle assembly to realize the rotation of the connection point between the upstream main cable 1 and the downstream main cable 10, so as to anchor the main cable structure to the anchor body 7. That is, the main cable structure uses the saddle assembly to press the main cable force to the anchor body 7, which can avoid the steel wire from spreading out for anchoring, and achieves rapid anchoring in the form of a whole bundle with the help of the saddle.

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

[0033] The overall main cable structure is arranged in a circular manner (the main cable structure is circular in plane), which has self-balancing mechanical properties. The steel wires inside the main cable structure self-balance the tension, and the tension anchorage of the main cable is optimized to a circular extrusion anchorage, which improves the crack resistance of the anchor body 7. The overall structure is a suspension bridge without an anchoring system, and the main cable anchoring system of a conventional suspension bridge is eliminated, that is, the main cable anchoring rod and anchoring system are eliminated, which optimizes the maintenance difficulty of the suspension bridge, improves the durability of the main cable structure, and reduces 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 achieve the extension of the steel wires. The connecting sleeves adopt existing steel wire sleeves, and there is no need to set up anchoring ends separately. The reliability of the connection between the upstream main cable and the downstream main cable is ensured by the connecting sleeve 1. The setting of the connecting sleeve avoiding the saddle assembly is conducive to the smooth passage of the upstream main cable and the downstream main cable through the saddle, ensuring the reliability of the setting of the connecting sleeve. The connecting sleeves at the connection of two adjacent steel wires are staggered to avoid the connection 10 between the upstream main cable 1 and the downstream main cable from being too large. The extension and rotation of the main cable structure is achieved through the connecting sleeve. The main cable structure is annular, and the rotating saddle 4 and the rotating main saddle 3 are used to press the cable force onto the anchor body 7 to achieve the anchoring of the main cable.

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

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

[0038] It is easy to understand that the reference Figure 3 and Figure 4As shown, a groove 8 is provided on the top surface of the anchor body 7, and the groove 8 is U-shaped. A saddle assembly is provided in the groove 8, and the rotating saddle 4 is placed on the inner side of the groove. The center line 9 of the main cable is provided along the side of the groove 8, and the rotating saddle 4 is provided at a distance 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 state, and then rotate through the saddle assembly; the setting of the groove 8 also facilitates the installation of the saddle assembly, and the end sides of the upstream main cable 1 and the downstream main cable 10 enter the groove and then pass through the saddle assembly. The width of the groove 8 is greater than the width of the rotating saddle 4 and the rotating main saddle 3 to facilitate people walking, and it is also convenient for operators to maintain the saddle assembly in the groove 8. The anchor body can be anchored on a gravity anchor or a U-shaped anchor hole in the mountain or the end of the main beam.

[0039] The main cable structure provided by this embodiment has an upstream main cable 1 and a downstream main cable 10 whose end steel wires are connected by connecting sleeves, so that the internal force of the main cable steel wires is self-balanced. The traditional suspension bridge transmits the cable force to the anchor body through the anchor rod, and does not require a large anchor chamber, which effectively controls the amount of concrete used to form the anchor chamber and controls the construction cost. The main cable structure provided by this embodiment has no anchoring system, and the cable force is anchored to the anchor body 7 by a rotation method. The anchor body 7 is in a three-way compression state, which greatly reduces the risk of cracking of the anchor body 7 and solves the problems of difficulty in dehumidification and anti-corrosion and high material consumption faced by the scattered anchoring of the main cable.

[0040] Example 2 This embodiment provides a suspension bridge, comprising a bridge deck and a main cable structure of a suspension bridge without an anchoring system as described in the first embodiment, wherein an anchor body 7 is placed below the bridge deck.

[0041] The main cable structure of the suspension bridge provided in this embodiment can be applied to single-span or multi-span suspension bridges, and can also be applied to 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, thereby improving the durability of the suspension bridge.

[0042] Example 3 A construction method for a main cable structure of a suspension bridge without an anchoring system, comprising the following steps: Anchor bodies 7 are respectively provided at both ends of the suspension bridge, and the anchor bodies 7 can be anchored on gravity anchors or U-shaped anchor holes in the mountain or ends of main beams; A saddle assembly is fixed in the groove 8 of the anchor body 7. The saddle assembly includes a rotating main saddle 3 and a rotating saddle 1. The rotating saddles are placed on both sides of the rotating main saddle in the same anchor body 7. The upstream main cable 1 and the downstream main cable 10 pass through the main saddle 2 on the top of the main tower and then arrive at the anchor body 7. The end sides of the upstream main cable 1 and the downstream main cable 10 pass through the rotating saddle 4 respectively. The ends of the steel wires in the upstream main cable 1 and the downstream main cable 10 are connected by connecting sleeves. The connection between the upstream main cable 1 and the downstream main cable 10 passes through the rotating main saddle 3. The connecting sleeve is set to avoid the rotating main saddle 3, so as to realize the rotation of the connection between 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 the suspension bridge, has outstanding economy, high reliability, mature and reliable construction method, and is convenient and feasible to construct.

[0044] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A main cable structure of a suspension bridge without an anchoring system, characterized in that: It includes an upstream main cable and a downstream main cable, and the two ends of the upstream main cable and the downstream main cable are connected respectively, so that the upstream main cable and the downstream main cable are connected into a ring structure, and the connection points at the two ends of the upstream main cable and the downstream main cable are respectively set through the anchor body, and a saddle assembly is fixed in the anchor body. The saddle assembly includes multiple saddles, and the end sides of the upstream main cable and the downstream main cable and the connection between the two pass through the saddle assembly to realize the rotation of the connection point of the upstream main cable and the downstream main cable, thereby anchoring the main cable structure to the anchor body.

2. The main cable structure of a suspension bridge without an anchoring system according to claim 1, characterized in that: The saddle assembly includes a rotating main saddle and a rotating saddle. The rotating saddles in the same anchor body are placed on both sides of the rotating main saddle. The upstream main cable passes through a rotating saddle in the anchor body, and the downstream main cable passes through another rotating saddle in the anchor body. The connection between the upstream main cable and the downstream main cable passes through the rotating main saddle.

3. The main cable structure of a suspension bridge without an anchoring system according to claim 2, characterized in that: The angle between the rotating cable saddle and the rotating main cable saddle in the same anchor body is set.

4. The main cable structure of a suspension bridge without an anchoring system according to claim 2, characterized in that: The two turning 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 revolving main saddles at both ends of the upstream main cable are symmetrically arranged about the center line in the longitudinal direction of the bridge.

5. The main cable structure of a suspension bridge without an anchoring system according to claim 2, characterized in that: The turning saddle at the same anchor body is arranged close to the center point of the upstream main cable or the downstream main cable, and the upstream main cable and the downstream main cable are respectively arranged through the main saddle at the top of the main tower, and the starting point of the upstream main cable passing through the turning saddle is placed in the same plane as the main saddle at the top of the main tower.

6. The main cable structure of a suspension bridge without an anchoring system according to claim 1, characterized in that: The anchor bodies at both ends of the upstream main cable and the downstream main cable are symmetrically arranged with respect to the center line in the longitudinal direction of the bridge.

7. The main cable structure of a suspension bridge without an anchoring system according to claim 1, characterized in that: A groove is provided on the top surface of the anchor body, in which the saddle is provided. The ends of the upstream main cable and the downstream main cable enter the groove and then pass through the saddle assembly. The width of the groove is greater than that of the saddle assembly to facilitate walking.

8. The main cable structure of a suspension bridge without an anchoring system according to claim 1, characterized in that: The ends of all the steel wires in the upstream main cable and the ends of all the steel wires in the downstream main cable are connected through connecting sleeves respectively. The connecting sleeves avoid the saddle arrangement, and the connecting sleeves at the connection points of two adjacent steel wires are staggered.

9. A suspension bridge comprising a bridge deck and a main cable structure of a suspension bridge without an anchoring system according to any one of claims 1 to 8, wherein the anchor is placed below the bridge deck.

10. A construction method for a main cable structure of a suspension bridge without an anchoring system according to any one of claims 1 to 8, characterized in that: Includes the following: Anchor bodies are set at both ends of the suspension bridge; securing the saddle assembly in the anchor body; The upstream main cable and the downstream main cable pass through the main tower respectively and then arrive at the anchor body. The end sides of the upstream main cable and the downstream main cable and the connection between the two pass through the saddle assembly to realize the rotation of the connection between the upstream main cable and the downstream main cable, thereby anchoring the main cable structure to the anchor body.

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