Three-degree-of-freedom controllable suspension bridge main cable anchoring device and control method

Abstract

The present application relates to the technical field of suspension bridge structure, and particularly to a three-degree-of-freedom controllable suspension bridge main cable anchoring device and control method. The device comprises a support, a horizontal sliding rail, a vertical sliding rail and an anchor plate. The support is provided with a cable dispersing sleeve on one side for dispersing the main cable into multiple main cable strands. The horizontal sliding rail is fixed on one side of the support and arranged in the horizontal direction. The vertical sliding rail is a plate-shaped structure connected to the horizontal sliding rail and horizontally adjustable through a horizontal adjusting structure. The anchor plate is a plate-shaped structure connected to the vertical sliding rail and vertically adjustable through a vertical adjusting structure. The anchor plate is provided with anchor holes corresponding to the main cable strands. The anchor plate is provided with a torsion adjusting structure for driving the anchor plate to rotate around the vertical anchor plate axis. The device has simple structure, convenient operation and use, and can construct a test model with three-degree-of-freedom adjustable translation and torsion of the main cable, which can be used as an important control means for exploring the erection simulation and torsion performance research of the space cable main cable.

Description

Technical Field

[0001] This invention relates to the field of suspension bridge structure technology, specifically to a three-degree-of-freedom controllable main cable anchoring device and control method for suspension bridges. Background Technology

[0002] The main cable of a spatial cable suspension bridge exists in a spatial state under lateral loads (top bracing force or the lateral component of the suspender force), which improves the bridge's lateral stiffness and wind resistance, while also enhancing its aesthetic appeal. This has led to the increasingly widespread application of spatial cable suspension bridges in practical engineering. Unlike the main cable of a parallel cable suspension bridge, the main cable of a spatial cable suspension bridge undergoes lateral, longitudinal, and torsional displacement during construction. Its force mechanism is complex and influenced by numerous factors, making it a key and challenging aspect of the main cable construction. Domestic and international scholars have conducted extensive theoretical analysis and experimental research on the main cable of spatial cable suspension bridges.

[0003] Due to the difficulty in accurately simulating the constraint conditions of the main cable at mid-span, existing space cable tests mainly use full-bridge models. These models are small-scale and affected by size effects, resulting in limited simulation of the torsional characteristics of the space cable. Currently, space cable tests primarily use anchorage devices such as clamps, pier anchors, and cast anchors to secure the wires and strands. These anchorage devices are all fixed in position and cannot be moved, making it difficult to simulate the lateral, vertical, and torsional displacements of the space cable at mid-span. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a three-degree-of-freedom controllable suspension bridge main cable anchoring device and control method.

[0005] The technical solution of this invention is: a three-degree-of-freedom controllable suspension bridge main cable anchoring device, comprising,

[0006] The support frame has a sling on one side for dividing the main cable into multiple main cable strands.

[0007] A horizontal slide rail, which is fixed to one side of the bracket and arranged in a horizontal direction;

[0008] A vertical slide rail, wherein the vertical slide rail is a plate-shaped structure connected to a horizontal slide rail whose horizontal position is adjustable via a horizontal adjustment structure;

[0009] Anchor plate, the anchor plate is a plate-shaped structure that is vertically adjustable and connected to a vertical slide rail through a vertical adjustment structure. The anchor plate has anchoring holes that correspond one-to-one with the main cable strands. The anchor plate is provided with a torsion adjustment structure for driving the anchor plate to rotate around the vertical anchor plate axis.

[0010] According to the three-degree-of-freedom controllable suspension bridge main cable anchoring device provided in this application, the torsion adjustment structure includes...

[0011] A torsion bar, one end of which is fixed to the center of the anchor plate, and the other end of which extends in a direction perpendicular to the anchor plate toward the side away from the main cable.

[0012] According to the present application, a three-degree-of-freedom controllable suspension bridge main cable anchoring device is provided, wherein the anchor plate is a circular plate structure arranged coaxially with the main cable, and a square outer frame is provided on the outside of the anchor plate; the outer frame is fixedly connected to the anchor plate in the vertical and horizontal directions of the plane; the anchor plate is rotatably connected to the outer frame around the axis, and a circular rib is provided on the outside of the anchoring hole of the anchor plate; a plurality of radial ribs are provided inside the circular ribs; the radial ribs pass through the center of the anchor plate and are fixed at both ends to the circular ribs.

[0013] According to the three-degree-of-freedom controllable suspension bridge main cable anchoring device provided in this application, the horizontal adjustment structure includes...

[0014] Two sets of horizontal chain hoists are placed at both ends of a horizontal slide rail, and the horizontal chain hoists are connected to the horizontal ends of the vertical slide rail via horizontal pull ropes.

[0015] According to the three-degree-of-freedom controllable suspension bridge main cable anchoring device provided in this application, the horizontal slide rail is provided with a horizontal baffle near the end to restrict the vertical slide rail from disengaging.

[0016] According to the three-degree-of-freedom controllable suspension bridge main cable anchoring device provided in this application, the vertical adjustment structure includes,

[0017] Two sets of vertical chain hoists are placed at both ends of the vertical slide rail. The vertical chain hoists are connected to the two ends of the outer frame outside the anchor plate by vertical pull ropes.

[0018] According to the three-degree-of-freedom controllable suspension bridge main cable anchoring device provided in this application, the vertical slide rail is provided with a vertical baffle near the end to restrict the vertical disengagement of the outer frame.

[0019] According to the three-degree-of-freedom controllable suspension bridge main cable anchoring device provided in this application, there are two sets of horizontal slide rails, which are respectively placed at the upper and lower ends of the support; the upper and lower ends of the vertical slide rail facing the support are provided with limiting slide grooves that respectively engage with the two sets of horizontal slide rails.

[0020] This application also provides a three-degree-of-freedom controllable suspension bridge main cable anchorage control method. The control method uses the aforementioned three-degree-of-freedom controllable suspension bridge main cable anchorage device to anchor the main cable of the suspension bridge, and is carried out according to the following steps:

[0021] S1. The main cable is split into multiple main cable strands by passing through the loose cable sleeve, and each main cable strand is passed through the anchor hole on the anchor plate to fix the main cable strand to the anchor plate.

[0022] S2. Adjust the vertical position of the anchor plate by using the vertical adjustment structure to move the anchor plate vertically to the set position;

[0023] S3. The horizontal position of the vertical slide rail is adjusted by the horizontal adjustment structure, so that the main cable changes from a vertical plane line shape to a spatial line shape. At the same time, the torsional constraint of the anchor plate can be released, and the torsional deformation that occurs when the main cable moves horizontally can be observed.

[0024] S4. Adjust the anchor plate to the set torsion angle through the torsion adjustment structure and observe the torsional moment of the main cable.

[0025] According to the three-degree-of-freedom controllable suspension bridge main cable anchorage control method provided in this application, the method of adjusting the anchor plate to a set torsion angle by means of a torsion adjustment structure in step S4 includes: using a torsion application device to torsion the torsion bar installed on the anchor plate and rotating the anchor plate to a set torsion angle.

[0026] The advantages of this application are as follows: 1. By constructing an anchoring device, this application can adjust the horizontal, vertical and torsional dimensions of the dispersed main cable, and construct an experimental model with adjustable three-dimensional degrees of freedom for the translation and torsion of the main cable. This model can be used as an important control means to explore the simulation of the main cable erection and the study of torsional performance of the space cable. The device is not only reasonable in structure and convenient to install and apply, but also solves the problems of the inability to accurately simulate the displacement state of the main cable at mid-span and the inability to measure the torsional stiffness in traditional space cable experiments. This allows the experimental model to greatly increase the experimental scale under the same conditions, which is very important for studying the torsional characteristics of the main cable and ensuring the construction quality and safety of the space cable suspension bridge.

[0027] 2. The torsion adjustment structure of this application includes a torsion bar set at the center of the anchor plate. A torsion force can be applied to the torsion bar by a torsion application device, which drives the anchor plate to rotate around the axis of the torsion bar, thereby changing the torsion angle of the anchor plate and the main cable strands fixed on the anchor plate, making the test of the torsion characteristics of the main cable simpler.

[0028] 3. This application provides circular and radial ribs on the anchor plate. The rib structure can effectively increase the structural strength of the entire anchor plate, making the anchor plate less prone to damage during use and providing smoother transmission of torsional forces.

[0029] 4. The horizontal adjustment structure of this application is extremely simple. The horizontal position of the vertical slide rail can be adjusted by two sets of horizontal hand-operated hoists. This adjustment mode is convenient, the degree of adjustment is easy to control, and it is convenient to conduct tests.

[0030] 5. This application provides a horizontal baffle on the horizontal slide rail to prevent the vertical slide rail from coming off the horizontal slide rail when adjusting its horizontal position, thereby improving the safety of the vertical slide rail adjustment process.

[0031] 6. The vertical adjustment structure of this application is extremely simple. The vertical position of the anchor plate and the outer frame can be adjusted by two sets of vertical hand-operated hoists. This adjustment mode is convenient, the degree of adjustment is easy to control, and it is convenient to conduct tests.

[0032] 7. This application provides a vertical baffle on the vertical slide rail to prevent the anchor plate from coming off the vertical slide rail when adjusting the vertical position, thereby improving the safety of the anchor plate adjustment process;

[0033] 8. The horizontal slide rails of this application have two sets, which are simple in structure and convenient for fixing and installing the vertical slide rails, and the overall structural stability of the device is better.

[0034] 9. The control method of this application is extremely simple, and the translation and torsion adjustment of the main cable is extremely convenient, which greatly facilitates the testing of the main cable and the overall operation is extremely convenient.

[0035] 10. This application provides a very convenient method for twisting the anchor plate, which greatly facilitates the study of the torsional characteristics of the main cable.

[0036] The device proposed in this application has a simple structure and is easy to operate. It constructs an experimental model with adjustable three-dimensional degrees of freedom for the main cable translation and torsion. It can be used as an important control means to explore the simulation of the main cable erection and the study of torsional performance. The device is not only structurally reasonable, but also easy to install and apply. Attached Figure Description

[0037] Figure 1 Side view of the anchoring device of this application;

[0038] Figure 2 : Front view of the anchoring device of this application;

[0039] Figure 3 : A schematic diagram of the connection between the horizontal and vertical slide rails in this application;

[0040] Figure 4 : A schematic diagram of the anchor plate structure of this application;

[0041] Wherein: 1—bracket; 2—horizontal slide rail; 3—vertical slide rail; 4—anchor plate; 5—torsion bar; 6—anchor hole; 7—circular rib; 8—radial rib; 9—horizontal hand chain hoist; 10—horizontal baffle; 11—vertical hand chain hoist; 12—vertical baffle; 13—limiting groove; 14—loose cable sleeve. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0046] This application relates to a three-degree-of-freedom controllable suspension bridge main cable anchorage device, which is mainly used for experimental research on the anchorage of suspension bridge main cables. By constructing an experimental model with adjustable three-dimensional degrees of freedom for the main cable translation and torsion, it can serve as an important control means to explore the simulation of the erection of the main cable of the space cable and the study of torsional performance. It facilitates experimental research on the anchorage of the main cable of the suspension bridge and provides a good theoretical basis for the anchorage of suspension bridges.

[0047] like Figures 1-4 As shown, the anchoring device of this application includes a bracket 1, a horizontal slide rail 2, a vertical slide rail 3, and an anchor plate 4. A loose cable sleeve is provided on one side of the bracket 1 for dividing the main cable into multiple main cable strands. The bracket 1 is the structure that connects one end of the main cable to be tested and is also the supporting structure of the entire anchoring device. The bracket 1 itself is a triangular bracket structure, but it is not limited to the form of a triangular bracket. It can also be other forms of bracket structure, as long as it can anchor and fix one end of the main cable. The loose cable sleeve is connected to the bracket 1. The purpose of the loose cable sleeve is to divide the main cable into multiple main cable strands, which facilitates the subsequent connection of the other end of the main cable.

[0048] The horizontal slide rail 2 is fixed to one side of the bracket 1 and arranged horizontally. The vertical slide rail 3 is a plate-shaped structure connected to the horizontal slide rail 2 through a horizontal adjustment structure. The horizontal slide rail 2 and the vertical slide rail 3 constitute the linear movement structure for the horizontal and vertical movement of the entire device. By driving the vertical slide rail 3 to move horizontally on the horizontal slide rail 2, the other end of the main cable can be adjusted horizontally. The anchor plate 4 is a plate-shaped structure connected to the vertical slide rail 3 through a vertical adjustment structure. The anchor plate 4 is vertically adjustable and installed on the vertical slide rail 3. By adjusting the position of the anchor plate 4 on the vertical slide rail 3, the other end of the main cable can be vertically adjusted. The anchor plate 4 has anchoring holes 6 corresponding one-to-one with the main cable strands. The anchor plate 4 is provided with a torsional adjustment structure for driving the anchor plate 4 to rotate around the vertical axis of the anchor plate 4.

[0049] Anchor plate 4 is a circular plate-like structure. An outer frame is provided on the outer circumference of anchor plate 4. The outer frame is a plate-like structure with an inner circle and an outer square. Anchor plate 4 is fitted into the middle of the outer frame. The anchor plate 4 and the outer frame are relatively fixed in the planar movement direction, i.e., the vertical and horizontal movement directions. Anchor plate 4 can rotate relative to the outer frame around its axis. Essentially, a circular slot is opened in the middle of the outer frame to engage anchor plate 4. Anchor plate 4 is engaged in the slot and can rotate around its axis. Its planar movement is synchronized with that of the outer frame.

[0050] In use, one end of the main cable is passed through the support 1, and the other end of the main cable is split into multiple main cable strands. Each of the split main cable strands is then passed through the through holes in the cable sleeve. After passing through the cable sleeve, the split main cable strands extend to one side of the anchor plate 4. The end anchors of these main cable strands are passed through the anchor holes 6 on the anchor plate 4 and fixedly connected to the anchor holes 6, thus completing the connection between the main cable strands and the anchor plate 4. During testing, the horizontal position of the entire anchor plate 4 and the end of the main cable fixed to the anchor plate 4 is adjusted by driving the vertical slide rail 3 to slide horizontally on the horizontal slide rail 2. The vertical position of the anchor plate 4 and the end of the main cable fixed to the anchor plate 4 is adjusted by driving the anchor plate 4 to move vertically on the vertical slide rail 3. The torsion angle of the end of the main cable is adjusted by rotating the anchor plate 4. Through the above adjustment methods, the required test conditions are achieved, facilitating operation by the test personnel.

[0051] In some embodiments of this application, the torsion adjustment structure described above has been optimized, specifically, as follows: Figure 1 , 2As shown in Figure 4, the torsion adjustment structure of this embodiment includes a torsion rod 5. One end of the torsion rod 5 is fixed to the center of the anchor plate 4, and the other end extends in a direction perpendicular to the anchor plate 4 away from the main cable. The torsion rod 5 can be directly connected to a torsion motor, which is controlled by a control system. The control system sends a torsion command to the torsion motor, which drives the torsion rod 5 to rotate around its own axis, thereby driving the rotation of the anchor plate 4. The rotation angle of the anchor plate 4 can be completely adjusted and controlled by the control system. In this way, during the test, the rotation angle of the anchor plate 4 can be precisely controlled by the control system.

[0052] In other embodiments of this application, the anchor plate 4 structure described above has been optimized, specifically, as follows: Figure 1 , 2 As shown in Figure 4, the anchor plate 4 in this embodiment is a circular plate structure arranged coaxially with the main cable. The anchor plate 4 is provided with a circular rib 7 on the outside of the anchor hole 6. Several radial ribs 8 are provided inside the circular rib 7. The radial ribs 8 pass through the center of the anchor plate 4 and are fixed at both ends to the circular rib 7.

[0053] The circular stiffeners 7 and radial stiffeners 8 form a frame structure to enhance the overall structural strength of the anchor plate 4. During the test, the anchor plate 4 is directly connected to the main cable and bears its tension. The anchor plate 4 also undergoes vertical movement and torsion; therefore, it needs sufficient strength to withstand the tension of the main cable. The frame structure formed by the circular stiffeners 7 and radial stiffeners and the anchor plate 4 effectively dissipates the force exerted by the main cable, ensuring that the main cable will not easily damage the template 4 during the test.

[0054] In other embodiments of this application, the above-described horizontal adjustment structure has been optimized, specifically, as follows: Figure 1 and 3 As shown, the horizontal adjustment structure includes two sets of horizontal hand chain hoists 9, which are placed at both ends of the horizontal slide rail 2. The horizontal hand chain hoists 9 are connected to the horizontal ends of the vertical slide rail 3 by horizontal pull ropes.

[0055] The horizontal adjustment structure in this embodiment is very simple. When it is necessary to adjust the vertical slide rail 3 horizontally, the experimenter only needs to pull the vertical slide rail 3 with the horizontal hand chain hoist 9 on the corresponding side. With the pull of the horizontal hand chain hoist 9, the vertical slide rail 3 can be easily moved horizontally on the horizontal slide rail 2 to reach the required horizontal position.

[0056] To prevent the vertical slide rail 3 from detaching from the horizontal slide rail 2 during horizontal movement, this embodiment includes a horizontal baffle 10 near the end of the horizontal slide rail 2 to restrict the detachment of the vertical slide rail 3. When the vertical slide rail 3 moves horizontally to both ends of the horizontal slide rail 2, it will be blocked by the horizontal baffle 10, preventing further movement of the vertical slide rail 3 and preventing it from detaching, thus improving the safety of the test.

[0057] In a further embodiment of this application, the vertical adjustment structure described above has been optimized. Specifically, the vertical adjustment structure of this embodiment includes two sets of vertical hand chain hoists 11, which are placed at both ends of the vertical slide rail 3. The vertical hand chain hoists 11 are connected to the vertical ends of the anchor plate 4 via vertical pull ropes. The actual connection method is that the vertical hand chain hoists 11 are connected to the vertical ends of the outer frame via vertical pull ropes.

[0058] The vertical adjustment structure of this embodiment is very simple. When the anchor plate 4 needs to be vertically adjusted, the experimenter only needs to pull the outer frame with the vertical hand chain hoist 11 on the corresponding side. With the pull of the vertical hand chain hoist 11, the anchor plate 4 can easily move along the vertical direction on the vertical slide rail 3 to reach the required vertical position.

[0059] To prevent the anchor plate 4 from detaching from the vertical slide rail 3 during vertical movement, this embodiment includes a vertical baffle 12 near the end of the vertical slide rail 3 to restrict the vertical detachment of the anchor plate 4 (actually, to restrict the outer frame). When the outer frame moves vertically to the upper or lower ends of the vertical slide rail 3, it will be blocked by the vertical baffle 12, preventing further movement of the anchor plate 4 and preventing it from detaching, thus improving the safety of the test.

[0060] In a preferred embodiment of this application, the arrangement structure of the horizontal slide rail 2 described above has been optimized, specifically, as follows: Figures 1-3 As shown, there are two sets of horizontal slide rails 2 in this embodiment, which are placed at the upper and lower ends of the bracket 1 respectively; the upper and lower ends of the vertical slide rail 3 facing the bracket 1 are provided with limiting slide grooves 13 that respectively engage with the two sets of horizontal slide rails 2.

[0061] Setting up two sets of horizontal slide rails 2 increases the overall stability of the structure and facilitates the arrangement of the vertical slide rail 3 and the horizontal slide rail 2. The upper and lower ends of the vertical slide rail 3 are slidably connected to the horizontal slide rail 2, greatly enhancing its stability. Furthermore, the slidable connection at both ends of the vertical slide rail 3 ensures smooth and stable horizontal movement. On the other hand, setting up two sets of horizontal slide rails 2 facilitates arrangement, saves materials, and facilitates disassembly and installation.

[0062] In order to facilitate the sliding of the vertical slide rail 3 on the horizontal slide rail 2 and the sliding of the anchor plate 4 on the vertical slide rail 3, this application can install a polytetrafluoroethylene sliding plate on the contact surface of the two to reduce the frictional resistance of the sliding surface and facilitate the sliding movement between them.

[0063] This application also provides a three-degree-of-freedom controllable suspension bridge main cable anchorage control method. The control method of this application is for the operation and control of the above-mentioned three-degree-of-freedom controllable suspension bridge main cable anchorage device. The specific method is carried out according to the following steps:

[0064] S1. The main cable is split into multiple main cable strands by passing through the loose cable sleeve, and each main cable strand is passed through the anchor hole 6 on the anchor plate 4 to fix the main cable strand to the anchor plate 4.

[0065] S2. Adjust the vertical position of the anchor plate 4 by means of the vertical adjustment structure, so that the anchor plate 4 is moved vertically to the set position;

[0066] In fact, the horizontal position of the anchor plate 4 is adjusted by pulling the vertical slide rail 3 horizontally by the horizontal hand-operated hoists 9 on both sides of the horizontal slide rail 2.

[0067] S3. Adjust the horizontal position of the vertical slide rail 3 by adjusting the horizontal adjustment structure, so that the main cable changes from a vertical plane line shape to a spatial line shape. At the same time, the torsional constraint of the anchor plate 4 can be released, and the torsional deformation that occurs when the main cable moves horizontally can be observed.

[0068] Vertical adjustment is actually achieved by using the vertical hand-operated hoist 11 to pull the outer frame vertically, so that the vertical position of the anchor plate 4 reaches the design point.

[0069] S4. Adjust the anchor plate 4 to the set torsion angle through the torsion adjustment structure and observe the torsional moment of the main cable;

[0070] The method of adjusting the anchor plate 4 to the set torsion angle by means of the torsion adjustment structure is actually to use the torsion application device to torsion the torsion rod 5 installed on the anchor plate 4, and rotate the anchor plate 4 to the set torsion angle.

[0071] like Figure 1 As shown, the horizontal direction of this application is Figure 1 The left and right directions in this application, the vertical direction and the vertical direction are... Figure 1 The vertical direction in this application refers to the torsion direction. Figure 1 The direction of rotation of the central torsion bar 5 around its axis.

[0072] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A three-degree-of-freedom controllable suspension bridge main cable anchoring device, characterized in that: include, The support (1) has a sling on one side for dividing the main cable into multiple main cable strands; A horizontal slide rail (2) is fixed to one side of the bracket (1) and arranged in a horizontal direction; Vertical slide rail (3), the vertical slide rail (3) is a plate-shaped structure that is horizontally adjustable and connected to the horizontal slide rail (2) through a horizontal adjustment structure; Anchor plate (4), the anchor plate (4) is a plate-shaped structure that is vertically adjustable and connected to the vertical slide rail (3) through a vertical adjustment structure. Anchor holes (6) corresponding to the main cable strands are provided on the anchor plate (4). A torsion adjustment structure for driving the anchor plate (4) to rotate around the vertical anchor plate (4) axis is provided on the anchor plate (4). The torsion adjustment structure includes, Torsion bar (5), one end of which is fixed to the center of anchor plate (4), and the other end extends away from the main cable in a direction perpendicular to anchor plate (4); The horizontal adjustment structure includes, Two sets of horizontal chain hoists (9) are placed at both ends of the horizontal slide rail (2). The horizontal chain hoists (9) are connected to the horizontal ends of the vertical slide rail (3) by horizontal pull ropes. The vertical adjustment structure includes, Two sets of vertical hand chain hoists (11) are placed at both ends of the vertical slide rail (3). The vertical hand chain hoists (11) are connected to the two ends of the outer frame of the anchor plate (4) through vertical pull ropes.

2. The three-degree-of-freedom controllable suspension bridge main cable anchoring device as described in claim 1, characterized in that: The anchor plate (4) is a circular plate structure arranged coaxially with the main cable. A square outer frame is provided on the outside of the anchor plate (4). The outer frame is fixedly connected to the anchor plate (4) in the vertical and horizontal directions of the plane. The anchor plate (4) is rotatably connected to the outer frame. A circular rib (7) is provided on the outside of the anchor hole (6) of the anchor plate (4). Several radial ribs (8) are provided inside the circular rib (7). The radial ribs (8) pass through the center of the anchor plate (4) and are fixed at both ends to the circular ribs (7).

3. The three-degree-of-freedom controllable suspension bridge main cable anchoring device as described in claim 1, characterized in that: The horizontal slide rail (2) is provided with a horizontal baffle (10) near its end to prevent the vertical slide rail (3) from dislodging.

4. The three-degree-of-freedom controllable suspension bridge main cable anchoring device as described in claim 1, characterized in that: The vertical slide rail (3) is provided with a vertical baffle (12) near the end to restrict the vertical disengagement of the outer frame.

5. The three-degree-of-freedom controllable suspension bridge main cable anchoring device as described in claim 1, characterized in that: There are two sets of horizontal slide rails (2), which are placed at the upper and lower ends of the bracket (1); the upper and lower ends of the vertical slide rail (3) facing the bracket (1) are provided with limiting slide grooves (13) that respectively engage with the two sets of horizontal slide rails (2).

6. A method for controlling the anchorage of the main cable of a three-degree-of-freedom controllable suspension bridge, characterized in that: The control method employs a three-degree-of-freedom controllable suspension bridge main cable anchoring device as described in any one of claims 1 to 5 to anchor the main cable of the suspension bridge, and proceeds according to the following steps: S1. The main cable is split into multiple main cable strands by passing through the loose cable sleeve. Each main cable strand is passed through the anchor hole (6) on the anchor plate (4) to fix the main cable strand to the anchor plate (4). S2. Adjust the vertical position of the anchor plate (4) by adjusting the vertical adjustment structure, so that the anchor plate (4) moves vertically to the set position; S3. Adjust the horizontal position of the vertical slide rail (3) by adjusting the horizontal adjustment structure, so that the main cable changes from a vertical plane line shape to a spatial line shape. At the same time, the torsional constraint of the anchor plate (4) can be released, and the torsional deformation that occurs when the main cable moves horizontally can be observed. S4. Adjust the anchor plate (4) to the set torsion angle through the torsion adjustment structure and observe the torsional moment of the main cable.

7. The method for controlling the anchorage of the main cable of a three-degree-of-freedom controllable suspension bridge as described in claim 6, characterized in that: In step S4, the method of adjusting the anchor plate (4) to a set torsion angle by means of the torsion adjustment structure includes: using a torsion application device to torsion bar (5) installed on the anchor plate (4) to rotate the anchor plate (4) to a set torsion angle.

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