Suspension bridge self-balancing main cable saddle roller system rapid installation method

Abstract

The application discloses a kind of suspension bridge self-balancing main cable saddle roller system quick installation method, it belongs to bridge construction technical field, including first positioning component and second positioning component are pre-installed on tower top grid structure, third positioning component is pre-installed on upper bearing plate box, fourth positioning component is pre-installed on permanent roller assembly;With lower bearing plate is hoisted and installed to tower top grid structure;Permanent roller assembly is hoisted and is guided and positioned to tower top grid structure pre-bias position by the cooperation of first positioning component and fourth positioning component with permanent roller assembly;The cooperation of first positioning component and fourth positioning component is released, permanent roller assembly is moved, and permanent roller assembly is fixed to the installation position of tower top grid structure by the cooperation of second positioning component and fourth positioning component;With upper bearing plate box is hoisted and fixed upper bearing plate box by the cooperation of first positioning component and third positioning component;Permanent roller assembly is installed sealing cover assembly thereafter.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a rapid installation method for a self-balancing main cable saddle roller system for suspension bridges. Background Technology

[0002] Suspension bridges, with their advantages of large span and high adaptability, are widely used in the construction of bridges in special terrains such as ultra-wide rivers, seas, and canyons. The force principle of a suspension bridge is to transfer the bridge deck load to the bridge towers through the main cables. However, during operation, when the bridge deck is subjected to vehicle loads or when vortex-induced vibrations occur, the horizontal components of the main cable at the top of the main tower in the side spans and the middle span will become unbalanced. If the main tower is relied upon solely to resist this unbalanced force, it will bear a large bending moment. To cope with this situation, a main tower with high rigidity would be required, which would undoubtedly increase costs significantly and be extremely uneconomical.

[0003] Currently, in suspension bridge design, the main cable is often constrained by sliding supports at the tower top. This means the main cable is fixed to a saddle, which is supported at the tower top and can slide freely along the bridge direction, thus achieving self-balancing. However, for ultra-long-span suspension bridges, the vertical force on the main cable at the tower top is enormous. Since friction equals the vertical component multiplied by the coefficient of friction, excessive vertical force leads to increased friction. When the friction exceeds the unbalanced horizontal component, self-balancing becomes impossible.

[0004] To solve this problem, a roller system needs to be installed between the main cable saddle and the tower top to change the sliding mode of the main cable saddle and the tower top to a rolling mode, thereby effectively reducing friction. The main cable saddle is initially in a pre-deflected state and returns to its final state after the bridge is completed. This makes the roller system structure quite complex, including components such as a lower bearing plate, a temporary lower bearing plate, a permanent roller assembly, temporary rollers, an upper bearing plate housing, and roller sealing covers, and the precision requirements between each component are extremely high.

[0005] Existing installation methods are insufficient to meet the installation requirements of such complex and high-precision roller systems, resulting in problems such as low installation accuracy, cumbersome procedures, and long construction periods. Summary of the Invention

[0006] The purpose of this invention is to provide a rapid installation method for a self-balancing main cable saddle roller system for suspension bridges, so as to solve the technical problems of low installation accuracy and low efficiency of existing roller systems.

[0007] Based on the above concept, the technical solution adopted by this invention is as follows:

[0008] A rapid installation method for a self-balancing main cable saddle roller system for a suspension bridge includes:

[0009] The first and second positioning components are pre-installed on the tower top grid structure, the third positioning component is pre-installed on the upper bearing plate box, and the fourth positioning component is pre-installed on the permanent roller assembly.

[0010] The lower support plate is hoisted and installed onto the tower top grid structure;

[0011] The permanent roller assembly is hoisted and guided and positioned to the pre-offset position of the tower top grid structure through the cooperation of the first positioning component and the fourth positioning component.

[0012] Release the engagement between the first positioning component and the fourth positioning component, move the permanent roller assembly, and fix the permanent roller assembly to the installation position of the tower top grid structure through the engagement of the second positioning component and the fourth positioning component;

[0013] The upper support plate box is hoisted and guided and fixed to the target position by the cooperation of the first positioning component and the third positioning component.

[0014] Install a sealing cover assembly on the permanent roller assembly.

[0015] Preferably, the permanent roller assembly includes multiple rollers arranged at intervals, with both ends of the rollers connected to a positioning frame, and the positioning frame bolted to a lifting jig; the fourth positioning component is detachably installed on both the lifting jig and the positioning frame.

[0016] Preferably, before hoisting and installing the lower support plate onto the tower top grid structure:

[0017] Clean the surface of the tower top grid structure and the debris inside the pin holes, draw a calibration line on the tower top grid structure based on the center line of the lower support plate, and place multiple positioning pins in the pin holes of the tower top grid structure.

[0018] Preferably, hoisting and installing the lower support plate onto the tower top grid structure includes:

[0019] The lower support plate is lifted to a predetermined distance above the tower top grid structure;

[0020] Clean the dust layer from the surface of the tower top grid structure again;

[0021] Move the lower support plate so that the punch aligns with the positioning hole of the lower support plate;

[0022] The lower support plate is lowered to the designed position of the tower top grid structure, and the center line of the lower support plate is aligned with the calibration line on the tower top grid structure.

[0023] Pins are driven into the lower support plate from the middle to both ends to fix the lower support plate to the tower top grid structure.

[0024] Preferably, after hoisting and installing the lower support plate onto the tower top grid structure, the process includes:

[0025] Temporary support plates were installed on the tower top grid structure.

[0026] Install the temporary frame onto the temporary support plate;

[0027] Clean the debris and dust from the temporary support plate, and hoist the temporary roller to the installation position so that both ends of the temporary roller are connected to the temporary frame.

[0028] Preferably, after the upper support plate box is installed, a plasma cutter is used to remove the lifting lugs on the upper support plate box, the temporary frame is removed, the surface of the tower top grid structure is cleaned again, and the sealing cover assembly is installed.

[0029] Preferably, after the lower support plate is hoisted and installed onto the tower top grid structure, a stainless steel base plate is installed on the side of the lower support plate and the top surface of the tower top grid structure, and the contact surface between the stainless steel base plate and the tower top grid structure is bonded with sealant.

[0030] Preferably, the sealing cover assembly includes a side span sealing cover, a middle span sealing cover, and a side sealing cover connected in sequence, wherein the side span sealing cover, the middle span sealing cover, and the side sealing cover together form an accommodating space for accommodating the permanent roller assembly.

[0031] Preferably, the side sealing cover and the side span sealing cover are formed by bending steel plates and connected to the edge tapped holes of the bottom plate of the upper support plate box with screws. A bent rubber plate and the stainless steel bottom plate are provided between the lower part of the side sealing cover and the side span sealing cover and the tower top grid structure. The middle span sealing cover is a telescopic sealing cover, the side sealing cover is a segmented sealing cover, and the middle span sealing cover can move synchronously with the upper support plate box.

[0032] Preferably, the permanent roller assembly is fitted with a sealing cover assembly comprising:

[0033] Install the side sealing covers sequentially from the middle span to the side span using a jacking method, and use a hand chain hoist for traction; seal and fix the connection between two adjacent side sealing covers with sealant;

[0034] After the side sealing cover is assembled and pushed into place, the side sealing cover is connected to the edge of the bottom plate of the upper support plate box by tapping screws.

[0035] Install the side span sealing cover and the middle span sealing cover in sequence, and connect the air outlet duct and the air inlet duct through quick-connect couplings according to the layout of the dehumidification system.

[0036] The beneficial effects of this invention are:

[0037] The proposed method for rapid installation of the self-balancing main cable saddle roller system for suspension bridges utilizes a precise installation guidance system formed by pre-positioning components on the tower top grid structure (first and second), combined with a fourth positioning component pre-positioned on the permanent roller assembly and a third positioning component pre-positioned on the upper deck box. When hoisting the permanent roller assembly, the fourth positioning component on the permanent roller assembly, in conjunction with the first positioning component on the tower top grid structure, directly and quickly guides and initially positions the permanent roller assembly to the pre-determined design position, eliminating the tedious on-site measurement and manual fine-tuning required in traditional methods. Subsequently, by disengaging the first positioning component and utilizing the cooperation of the second and fourth positioning components, the permanent roller assembly can be reliably guided and fixed to its final installation position, ensuring precise placement. Similarly, when hoisting the upper deck box, the third positioning component on the upper deck box, in conjunction with the first positioning component on the tower top grid structure, effectively guides the upper deck box to the target position accurately in one go and fixes it, avoiding repeated hoisting and adjustments. By utilizing multiple positioning components for relay-style precise positioning between various components and the tower top grid structure, the installation process of precision components such as the permanent roller assembly and the upper bearing plate housing is simplified. This effectively overcomes the shortcomings of traditional installation methods, such as difficulty in guaranteeing accuracy and cumbersome and time-consuming steps. While ensuring the relative positional accuracy between components, it improves installation efficiency and shortens the construction cycle. Attached Figure Description

[0038] Figure 1 This is a flowchart of a rapid installation method for a self-balancing main cable saddle roller system for suspension bridges provided in an embodiment of the present invention;

[0039] Figure 2 This is a first schematic diagram of a rapid installation method for a self-balancing main cable saddle roller system for suspension bridges provided in an embodiment of the present invention;

[0040] Figure 3 This is a second schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0041] Figure 4 This is a third schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0042] Figure 5 This is a fourth schematic diagram of the rapid installation method for the self-balancing main cable saddle roller system of a suspension bridge provided in this embodiment of the invention;

[0043] Figure 6 This is the fifth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in the embodiments of the present invention;

[0044] Figure 7 This is the sixth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in the embodiments of the present invention;

[0045] Figure 8 This is the seventh schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in the embodiments of the present invention;

[0046] Figure 9 This is the eighth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in the embodiments of the present invention;

[0047] Figure 10 This is the ninth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in the embodiments of the present invention;

[0048] Figure 11 This is the tenth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in the embodiments of the present invention;

[0049] Figure 12 This is the eleventh schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0050] Figure 13 This is the twelfth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0051] Figure 14 This is the thirteenth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0052] Figure 15 This is the fourteenth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0053] Figure 16 This is the fifteenth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0054] Figure 17 This is the sixteenth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0055] Figure 18 This is the seventeenth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0056] Figure 19 This is the eighteenth schematic diagram of the rapid installation method of the self-balancing main cable saddle roller system for suspension bridges provided in this embodiment of the invention;

[0057] Figure 20 This is a schematic diagram of the structure of the first positioning part and the fourth positioning component cooperating with each other, provided in an embodiment of the present invention;

[0058] Figure 21 This is a schematic diagram of the structure of the second positioning part and the fourth positioning component cooperating with each other, provided in an embodiment of the present invention;

[0059] Figure 22 This is a schematic diagram of the structure of the first positioning part and the third positioning component cooperating with each other, provided in an embodiment of the present invention;

[0060] Figure 23 This is a first structural schematic diagram of the sealing cover assembly provided in an embodiment of the present invention;

[0061] Figure 24 yes Figure 23 Enlarged view of point A in the middle;

[0062] Figure 25 This is a schematic diagram of the second structure of the sealing cover assembly provided in an embodiment of the present invention;

[0063] Figure 26 This is a third structural schematic diagram of the sealing cover assembly provided in an embodiment of the present invention;

[0064] Figure 27 This is a fourth structural schematic diagram of the sealing cover assembly provided in an embodiment of the present invention;

[0065] Figure 28 This is a fifth structural schematic diagram of the sealing cover assembly provided in an embodiment of the present invention.

[0066] In the picture:

[0067] 100. First positioning component; 200. Second positioning component; 300. Third positioning component; 400. Fourth positioning component;

[0068] 1. Tower top grid structure; 2. Upper support plate box; 3. Permanent roller assembly; 31. Lifting jig; 4. Lower support plate; 41. Pin; 5. Punch; 6. Temporary support plate; 7. Temporary frame; 8. Temporary roller; 9. Sealing cover assembly; 91. Side span sealing cover; 92. Middle span sealing cover; 93. Side sealing cover; 94. Stainless steel base plate; 95. Transparent window; 96. Quick-connect coupling. Detailed Implementation

[0069] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, 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.

[0070] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0073] See Figures 1 to 28 The rapid installation method for the self-balancing main cable saddle roller system of a suspension bridge provided in this embodiment of the invention includes pre-installing a first positioning component 100 and a second positioning component 200 on the tower top grid structure 1, pre-installing a third positioning component 300 on the upper bearing plate box 2, and pre-installing a fourth positioning component 400 on the permanent roller assembly 3; hoisting and installing the lower bearing plate 4 onto the tower top grid structure 1; hoisting the permanent roller assembly 3 and, through the cooperation of the first positioning component 100 and the fourth positioning component 400, assembling the permanent roller assembly 3... Guide and position the permanent roller assembly 3 to the pre-offset position of the tower top grid structure 1; release the cooperation between the first positioning component 100 and the fourth positioning component 400, move the permanent roller assembly 3, and fix the permanent roller assembly 3 to the installation position of the tower top grid structure 1 through the cooperation of the second positioning component 200 and the fourth positioning component 400; hoist the upper support plate box 2 and guide and fix the upper support plate box 2 to the target position through the mutual cooperation of the first positioning component 100 and the third positioning component 300; install the sealing cover assembly 9 on the permanent roller assembly 3.

[0074] The proposed method for rapid installation of the self-balancing main cable saddle roller system for suspension bridges utilizes a precise installation guidance system formed by a first positioning component 100 and a second positioning component 200 pre-installed on the tower top grid structure 1, combined with a fourth positioning component 400 pre-installed on the permanent roller assembly 3 and a third positioning component 300 pre-installed on the upper bearing plate box 2. When hoisting the permanent roller assembly 3, the fourth positioning component 400 on the permanent roller assembly 3, in conjunction with the first positioning component 100 on the tower top grid structure 1, can directly and quickly guide and initially position the permanent roller assembly 3 accurately to the pre-deflection position required by the design, eliminating the tedious on-site measurement and manual fine-tuning required in traditional methods. Subsequently, by disengaging the first positioning component 100 and utilizing the cooperation between the second positioning component 200 and the fourth positioning component 400, the permanent roller assembly 3 can be reliably guided and fixed to its final installation position, ensuring precise placement. Similarly, during the hoisting of the upper bearing plate box 2, the third positioning component 300 on the upper bearing plate box 2 cooperates with the first positioning component 100 of the tower top grid structure 1 to effectively guide the upper bearing plate box 2 to the target position and fix it in one go, avoiding repeated hoisting and adjustment. Utilizing multiple positioning components for relay-style precise positioning between various components and the tower top grid structure 1 simplifies the installation process of precision components such as the permanent roller assembly 3 and the upper bearing plate box 2. This effectively overcomes the shortcomings of traditional installation methods, such as difficulty in guaranteeing accuracy and complex, time-consuming steps. While ensuring the relative positional accuracy between components, it improves installation efficiency and shortens the construction cycle.

[0075] The following is a detailed explanation of the specific steps and working principle of the rapid installation method for the self-balancing main cable saddle roller system of this suspension bridge.

[0076] Specifically, in this embodiment, the first positioning component 100 and the second positioning component 200 both protrude upward to form positioning protrusions, and the bottoms of the third positioning component 300 and the fourth positioning component 400 form corresponding positioning slots. When the two corresponding positioning components are engaged, the positioning protrusions are engaged in the positioning slots, thereby making the two corresponding components stably connected.

[0077] Preferably, the contact position between the positioning protrusion and the positioning slot forms a guide surface, thereby providing smoothness when the positioning protrusion and the positioning slot engage, and improving installation efficiency.

[0078] The guide surface can be a guide slope, a guide arc surface, or a guide curve surface, etc. There is no specific limitation on its form. It is only necessary to ensure that the positioning protrusion can be smoothly engaged with the positioning slot during the cooperation of the two components.

[0079] During installation, holes are pre-drilled on each component according to the bolt connection positions of each positioning part and each component. Before hoisting and installing the lower support plate 4 onto the tower top grid structure 1, debris is cleaned from the surface of the tower top grid structure 1 and the pin holes, and a calibration line is drawn on the tower top grid structure 1 based on the center line of the lower support plate 4. Multiple positioning pins 5 are placed in the pin holes of the tower top grid structure 1.

[0080] The process of hoisting and installing the lower support plate 4 onto the tower top grid structure 1 includes lifting the lower support plate 4 to a predetermined height above the tower top grid structure 1; cleaning the dust layer on the surface of the tower top grid structure 1 again; checking the integrity and relative position of each matching component for any changes, and correcting any damage or deformation that occurred during transportation or storage. When the permanent roller assembly 3 is hoisted to a certain height at the top of the tower, a hand-operated hoist is used to assist in the hoisting, moving the lower support plate 4 so that the punch 5 aligns with the positioning holes of the lower support plate 4, while the hoisting system still bears some force. After the elevation and flatness of the lower support plate 4 meet the design requirements of the drawings, the lower support plate 4 is lowered to the designed position of the tower top grid structure 1, aligning the center line of the lower support plate 4 with the calibration line on the tower top grid structure 1; and driving pins 41 from the middle of the lower support plate 4 towards both ends to fix the lower support plate 4 to the tower top grid structure 1.

[0081] After hoisting and installing the lower support plate 4 onto the tower top grid structure 1, install the temporary support plate 6 onto the tower top grid structure 1, and install the temporary frame 7 onto the temporary support plate 6; clean the debris and dust from the temporary support plate 6, and hoist the temporary roller 8 to the installation position. Since the temporary roller 8 is relatively light, its position can be adjusted by pulling with a hand hoist so that both ends of the temporary roller 8 are connected to the temporary frame 7.

[0082] The permanent roller assembly 3 comprises multiple spaced rollers, with both ends of the rollers connected to a positioning frame. The positioning frame is bolted to the lifting jig 31. A fourth positioning component 400 is detachably installed on both the lifting jig 31 and the positioning frame. The design of the permanent roller assembly 3, with multiple spaced rollers connected to the positioning frame at both ends, ensures even distribution of load under stress, effectively improving the overall load-bearing capacity, ensuring smooth rolling of the main cable saddle on the rollers, reducing wear and damage caused by uneven stress, and extending service life. The positioning frame is bolted to the lifting jig 31. This connection method facilitates the lifting of the permanent roller assembly 3 during installation, and the bolted connection also facilitates disassembly, enabling later maintenance or replacement of roller assembly components. The fourth positioning component 400 can be detachably installed on the lifting jig 31 and the positioning frame. During lifting and installation, the fourth positioning component 400 can be used in conjunction with other positioning components to accurately position the permanent roller assembly 3, thereby improving the installation accuracy. After installation, it can be detached without affecting the normal operation of the roller assembly. This satisfies the installation accuracy requirements while ensuring the flexibility and maintainability of the structure, thus comprehensively improving the installation and performance of the self-balancing main cable saddle roller system of the suspension bridge.

[0083] After the permanent roller assembly 3 is guided and positioned to the pre-offset position of the tower top grid structure 1, the fourth positioning component 400 and the lifting frame 31 are removed. At this time, the permanent roller assembly 3 can roll freely in the bridge direction. Therefore, using the bolt holes of the positioning frame and the lifting frame 31, one of the fourth positioning components 400 is installed at the end of the main span and temporarily fixed with the second positioning component 200. If the permanent roller assembly 3 rolls in the bridge direction during this process, it can be adjusted by using a hand hoist or by pushing manually. After adjustment and measurement, it is fixed so that the permanent roller assembly 3 is always in the pre-offset installation position.

[0084] In addition, after the lower support plate 4 is hoisted and installed onto the tower top grid structure 1, a stainless steel base plate 94 is installed on the side of the lower support plate 4 and the top surface of the tower top grid structure 1. The contact surface between the stainless steel base plate 94 and the tower top grid structure 1 is bonded with sealant. The sealant bonding enhances the sealing performance of the connection between the stainless steel base plate 94 and the tower top grid structure 1, further preventing the intrusion of moisture, dust, etc., and protecting the internal structure. The stainless steel base plate 94 will be removed after the bridge is completed. The stainless steel base plate 94 is an integral part of the sealing cover assembly 9. Due to its length, it would be inconvenient to install later, so it is installed during this process. Installing the integral stainless steel base plate 94 in advance, considering its long length as a component of the sealing cover assembly 9, effectively avoids subsequent installation difficulties and improves the overall installation efficiency. Removing the stainless steel base plate 94 after the bridge is completed satisfies the needs of the installation process without placing an additional burden on the structure and function of the completed bridge. This makes the installation process of the entire suspension bridge's self-balancing main cable saddle roller system more reasonable and efficient, improving the overall project quality.

[0085] After the permanent roller assembly 3 is installed, the upper bearing plate box 2 is hoisted and guided and fixed to the target position by the cooperation of the first positioning component 100 and the third positioning component 300.

[0086] Specifically, clean the debris and dust from the upper surface of the roller, check the integrity of the third positioning component 300 installed on the side of the upper bearing plate box 2, and check whether it has been bumped or damaged during transportation. If it has been bumped or deformed, it should be corrected in time. When the upper bearing plate box 2 is lifted to a certain height at the top of the tower, use a hand-operated hoist to align the first positioning component 100 and the third positioning component 300 in planar position, and lower them directly into place. Remove the fourth positioning component 400 and the second positioning component 200 to complete the installation of the upper bearing plate box 2.

[0087] After the upper support plate box 2 is installed, the lifting lugs on the upper support plate box 2 are removed using a plasma cutter, the temporary frame 7 is removed, the surface of the tower top grid structure 1 is cleaned again, and the sealing cover assembly 9 is installed.

[0088] Specifically, the sealing cover assembly 9 includes a side span sealing cover 91, a middle span sealing cover 92, and a side sealing cover 93 connected in sequence. These three covers together form an accommodating space for housing the permanent roller assembly 3. The modular sealing cover design tightly conforms to the shape of the permanent roller assembly 3, effectively preventing external dust and debris from entering, protecting the permanent roller assembly 3, reducing wear caused by impurities, extending its service life, and thus ensuring the long-term stable operation of the roller system. Furthermore, the modular structure facilitates installation and disassembly. During installation, each part of the sealing cover can be operated separately, reducing installation difficulty and improving efficiency. If maintenance or replacement of parts is required later, the permanent roller assembly 3 can be easily removed without dismantling the entire sealing structure, reducing maintenance workload.

[0089] More specifically, the side sealing cover 93 and the side span sealing cover 91 are formed by bending steel plates and connected to the edge tapped holes of the bottom plate of the upper bearing plate housing 2 with screws. A bent rubber plate and a stainless steel base plate 94 are provided between the lower part of the side sealing cover 93 and the side span sealing cover 91 and the tower top grid structure 1. The middle span sealing cover 92 is a telescopic sealing cover, and the side sealing cover 93 is a segmented sealing cover. The middle span sealing cover 92 can move synchronously with the upper bearing plate housing 2. The side sealing cover 93 and the side span sealing cover 91 are formed by bending steel plates. This processing method makes the shape of the sealing cover fit the installation part better and enhances the sealing effect. The connection method of using screws to connect to the edge tapped holes of the bottom plate of the upper bearing plate housing 2 is simple and reliable, easy to install and disassemble, and convenient for subsequent maintenance and repair of the internal permanent roller assembly 3. A bent rubber plate and a stainless steel base plate 94 are installed between the lower part of the side sealing cover 93 and the side span sealing cover 91 and the tower top grid structure 1. The bent rubber plate has good flexibility and sealing performance, which can effectively fill gaps, further enhance the seal, and prevent rainwater, dust, etc. from entering. The stainless steel base plate 94 plays a role in reinforcement and protection, extending the service life of the sealing structure. The mid-span sealing cover 92 is telescopic and can move synchronously with the upper bearing plate box 2. It can adapt to the position changes of the main cable saddle during the bridge construction process, always maintaining an effective seal on the permanent roller assembly 3, ensuring that its normal operation is not affected. The side sealing cover 93 is a segmented sealing cover, which, while meeting the sealing requirements, is easy to adjust and install flexibly according to the actual site conditions, reducing the installation difficulty and improving the installation efficiency. Overall, it improves the reliability and practicality of the sealing structure of the self-balancing main cable saddle roller system of the suspension bridge.

[0090] Preferably, the side sealing cover 93 and the side span sealing cover 91 are equipped with a transparent plexiglass window 95 for easy observation during construction.

[0091] Furthermore, the installation of the sealing cover assembly 9 on the permanent roller assembly 3 includes sequentially installing the side sealing covers 93 by pushing from the middle span to the side span, and using a hand chain hoist for traction; during the pushing process, the posture of the sealing cover is manually corrected to avoid interference from the first positioning component 100 at the joint of the side sealing cover 93, and the connection between two adjacent side sealing covers 93 is sealed and fixed with sealant; then, it is fixed with M10×25 screws + washers + nuts.

[0092] After the side sealing cover 93 is assembled and pushed into place, the side sealing cover 93 is connected to the edge of the bottom plate of the upper support plate box 2 by tightening screws; install the side sealing covers 93 on both sides at one time in this way.

[0093] Finally, install the side span sealing cover 91 and the middle span sealing cover 92 in sequence, and connect the air outlet duct and air inlet duct through quick-connect coupling 96 according to the layout of the dehumidification system to complete the installation of the entire main cable saddle roller system.

[0094] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present 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 the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for rapid installation of a self-balancing main cable saddle roller system for a suspension bridge, characterized in that, include: The first positioning component (100) and the second positioning component (200) are pre-installed on the tower top grid structure (1), the third positioning component (300) is pre-installed on the upper support plate box (2), and the fourth positioning component (400) is pre-installed on the permanent roller assembly (3). The lower support plate (4) is hoisted and installed onto the tower top grid structure (1); The permanent roller assembly (3) is hoisted and guided and positioned to the pre-offset position of the tower top grid structure (1) by the cooperation of the first positioning component (100) and the fourth positioning component (400). Release the cooperation between the first positioning component (100) and the fourth positioning component (400), move the permanent roller assembly (3), and fix the permanent roller assembly (3) to the installation position of the tower top grid structure (1) through the cooperation between the second positioning component (200) and the fourth positioning component (400); The upper support plate box (2) is hoisted and guided and fixed to the target position by the cooperation of the first positioning component (100) and the third positioning component (300); Install the sealing cover assembly (9) on the permanent roller assembly (3); The permanent roller assembly (3) includes multiple rollers arranged at intervals, the two ends of the rollers are connected to the positioning frame, and the positioning frame is bolted to the lifting jig (31); the fourth positioning component (400) is detachably installed on the lifting jig (31) and the positioning frame respectively. After the lower support plate (4) is hoisted and installed onto the tower top grid structure (1), a stainless steel base plate (94) is installed on the side of the lower support plate (4) and the top surface of the tower top grid structure (1). The contact surface between the stainless steel base plate (94) and the tower top grid structure (1) is bonded with sealant. The sealing cover assembly (9) includes a side span sealing cover (91), a middle span sealing cover (92) and a side sealing cover (93) connected in sequence. The side span sealing cover (91), the middle span sealing cover (92) and the side sealing cover (93) together form an accommodating space for accommodating the permanent roller assembly (3). The side sealing cover (93) and the side span sealing cover (91) are formed by bending steel plates and connected to the edge tapping holes of the bottom plate of the upper support plate box (2) with screws. The lower part of the side sealing cover (93) and the side span sealing cover (91) is provided with a bent rubber plate and the stainless steel bottom plate (94) between it and the tower top grid structure (1). The middle span sealing cover (92) is a telescopic sealing cover, the side sealing cover (93) is a segmented sealing cover, and the middle span sealing cover (92) can move synchronously with the upper support plate box (2).

2. The rapid installation method for the self-balancing main cable saddle roller system of a suspension bridge according to claim 1, characterized in that, Before hoisting and installing the lower support plate (4) onto the tower top grid structure (1): Clean the debris from the surface of the tower top grid structure (1) and the pin holes, draw a calibration line on the tower top grid structure (1) based on the center line of the lower support plate (4), and place multiple positioning pins (5) in the pin holes of the tower top grid structure (1).

3. The rapid installation method for the self-balancing main cable saddle roller system of a suspension bridge according to claim 2, characterized in that, The process of hoisting and installing the lower support plate (4) onto the tower top grid structure (1) includes: The lower support plate (4) is lifted and raised above the tower top grid structure (1) by a preset distance; Clean the dust layer on the surface of the tower top grid structure (1) again; Move the lower support plate (4) so ​​that the punch (5) is aligned with the positioning hole of the lower support plate (4); The lower support plate (4) is lowered to the designed position of the tower top grid structure (1), and the center line of the lower support plate (4) is aligned with the calibration line on the tower top grid structure (1). Pins (41) are driven into the lower support plate (4) from the middle to both ends to fix the lower support plate (4) to the tower top grid structure (1).

4. The rapid installation method for the self-balancing main cable saddle roller system of a suspension bridge according to claim 1, characterized in that, After the lower support plate (4) is hoisted and installed onto the tower top grid structure (1), the following steps are taken: A temporary support plate (6) is installed on the tower top grid structure (1). Install the temporary frame (7) onto the temporary support plate (6); Clean the debris and dust from the temporary support plate (6), and hoist the temporary roller (8) to the installation position so that both ends of the temporary roller (8) are connected to the temporary frame (7).

5. The rapid installation method for the self-balancing main cable saddle roller system of a suspension bridge according to claim 4, characterized in that, After the upper support plate box (2) is installed, the lifting lugs on the upper support plate box (2) are removed by plasma cutting machine, the temporary frame (7) is removed, the surface of the tower top grid structure (1) is cleaned again, and the sealing cover assembly (9) is installed.

6. The rapid installation method for the self-balancing main cable saddle roller system of a suspension bridge according to claim 1, characterized in that, Installing the sealing cover assembly (9) on the permanent roller assembly (3) includes: Install the side sealing covers (93) sequentially from the middle span to the side span by pushing, and use a hand chain hoist for traction; seal and fix the connection between two adjacent side sealing covers (93) with sealant; After the side sealing cover (93) is assembled and pushed into place, the side sealing cover (93) is connected to the edge of the bottom plate of the upper support plate box (2) by tapping screws. Install the side span sealing cover (91) and the middle span sealing cover (92) in sequence, and connect the air outlet duct and the air inlet duct through quick-connect connector (96) according to the arrangement of the dehumidification system.

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