Cable-stayed bridge damper hoisting installation and construction method in low-clearance and restricted environment

Abstract

The application belongs to the field of bridge damper installation, and specifically relates to a low-clearance and limited-environment cable-stayed bridge damper hoisting installation device and a construction method. The device comprises a damper embedded part, which comprises a beam bottom damper embedded part embedded in a beam bottom and used for connecting and installing a beam bottom damper component, and a pier column damper embedded part embedded on a pier column and used for connecting and installing a pier column damper component. The device further comprises a lifting appliance assembly, which comprises a bolt lifting appliance, a through wire rod, a counterforce seat, a counterforce type lifting appliance, a bolted type lifting appliance, an inserted type lifting appliance and a round cake type lifting appliance. The application realizes safe, accurate and efficient installation of dampers under complex working conditions.

Description

Technical Field

[0001] This invention belongs to the field of bridge damper installation, specifically a damper hoisting device and construction method for cable-stayed bridges in low-headroom, confined environments. Background Technology

[0002] In areas prone to high-intensity earthquakes, to reduce structural seismic response, improve bridge seismic safety, limit structural displacement, and improve the operational conditions of expansion joints, it is usually necessary to install transverse and longitudinal viscous damper seismic systems. Currently, the mainstream installation methods for similar dampers are as follows: ① For lightweight and small-sized dampers, a crane is often used for overall hoisting; ② When installing bottom-mounted dampers, the crane mast needs to be modified to lift the damper to the pre-embedded plate position at the bottom of the beam before installation; ③ An operating platform is erected at the damper installation point, the damper is placed on the platform first, and then lifted to the designated installation position using chain hoists, jacks, and other equipment.

[0003] The aforementioned conventional construction methods can only meet the installation requirements of small dampers under excellent construction conditions. When facing restricted construction environments or installing extra-large dampers, their limitations become apparent, specifically: ① When using cranes to install heavy beam bottom dampers, larger tonnage cranes are required, and mast modifications are costly; ② When the clearance at the bottom of the beam is less than 10m, cranes cannot carry out lifting operations; ③ The rotating main pier is often located in restricted environments such as railway slopes, and in some scenarios, there is no space for a crane, or the crane's operating radius is limited due to proximity to operating lines or close proximity to railway safety clearances, failing to meet lifting operation requirements; ④ When using the platform erection method, the site needs to be hardened to ensure the foundation bearing capacity, and this method also suffers from low construction efficiency and a high safety risk factor for manual operation. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a device and construction method for installing dampers on cable-stayed bridges in low-headroom, confined environments.

[0005] This invention adopts the following technical solution: a large damper hoisting device for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments, comprising: Damper embedded part, the damper embedded part includes: Beam bottom damper embedded part, which is embedded in the bottom of the beam and used to connect and install the beam bottom damper component; Pier damper embedded part, which is embedded in the pier and used to connect and install the pier damper component; The lifting device assembly includes: A bolt lifting device is installed between the embedded part of the beam bottom damper and the beam bottom damper component for lifting the beam bottom damper component; A through-thread rod is installed between the embedded part of the beam bottom damper and the beam bottom damper component for secondary hoisting of the beam bottom damper component; The reaction seat is located at the lower end of the through screw and is used to support the pre-embedded parts of the damper at the bottom of the beam. A reaction-type lifting device, which is installed on the top of the pier column and is used to lift the embedded parts of the pier column damper; A bolted lifting device is installed on the pier column damper component and is used to hang a hand-operated hoist to lift the longitudinal damper crossbar of the bridge. An insert-type lifting device is installed on the pier column damper component and is used to hang a hand-operated hoist to lift the transverse damper crossbar of the bridge. A disc-shaped lifting device, wherein the disc-shaped lifting device is disposed at the end of the damper crossbar.

[0006] In some embodiments, the upper end of the through screw is connected to the embedded part of the beam bottom damper, and the lower end passes through the reaction seat and is locked and fixed by double nuts, forming the vertical bearing reaction structure of the claw hydraulic jack.

[0007] In some embodiments, the main body of the reaction-type lifting device is mounted on the top surface of the pier, and a jack is provided at its tail. The jack supports the side wall of the pier to achieve anchoring and limiting of the reaction-type lifting device. The front end of the reaction-type lifting device is provided with a lifting lug for hanging a hand-operated hoist.

[0008] In some embodiments, the bolted lifting tool is adapted to connect the lifting point of the pre-embedded part at the bottom of the beam to the damper assembly at the bottom of the beam; the bolted lifting tool is adapted to the lifting point setting of the pier damper assembly when installing the longitudinal bridge damper crossbar; the insert-type lifting tool is adapted to the lifting point setting of the pier damper assembly when installing the transverse bridge damper crossbar; and the disc-type lifting tool is adapted to connect the lifting point of the end connection hole of the damper crossbar.

[0009] A method for hoisting and installing large dampers for cable-stayed bridges in high-intensity seismic zones under low-headroom and confined environments, based on a hoisting and installation device, includes the following steps: S1: Construction preparations before damper installation; S2: Installation of the beam bottom damper assembly; S3: Installation of pier damper assembly; S4: Damper crossbar installation; S5: Damper adjustment and finished product protection.

[0010] In some embodiments, step S1 includes: S11: Technical preparation, complete drawing review and technical briefing, clarify the core parameters of the damper; prepare and approve special construction plan and safety plan; establish a high-precision construction measurement and control network; S12: On-site preparation, cleaning the work surface, planning the entry route and station site for construction equipment, checking and reinforcing the foundation of the work site, and erecting safety protection facilities that meet the specifications. S13: Material and equipment preparation, check the quality certification documents of dampers and supporting components, verify the dimensions and appearance of components, and configure and test the measuring, hoisting, fastening and auxiliary processing equipment required for construction. S14: Verification and cleaning of embedded parts. Based on the measurement and control network, verify the core position parameters of the damper embedded parts, clean the grout in the holes of the embedded parts, and ensure the installation accuracy and anchoring strength. S15: Determine the hoisting parameters, verify the component weight by comparing data and on-site measurement, calculate the core parameters of the hand chain hoist in combination with the hoisting conditions, reserve a safety margin of no less than 3 times, and determine the model, quantity and arrangement of the hand chain hoist.

[0011] Step S2 includes: S21: The lifting vehicle enters the construction area where the bottom damper components of the beam are installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the embedded parts of the bottom damper of the beam. S22: Install 4 sets of bolt lifting tools without hindering subsequent work conditions, and then hang 4 sets of hand chain hoists on the 4 sets of bolt lifting tools respectively; S23: Install 4 sets of bolt lifting devices at the positions of the embedded bolt lifting devices for the bottom damper of the beam, corresponding to the positions of the bottom damper components, with the lifting points facing upwards; S24: Hook the lower hook of the hand chain hoist onto the 4 sets of bolt hangers of the damper component at the bottom of the beam, and pull the 4 sets of hand chain hoist chains smoothly and slowly to make the hand chain hoist chains bear the force. S25: Smoothly and slowly pull the four sets of hand chain hoists to lift the damper components at the bottom of the beam. S26: When the damper component at the bottom of the beam is lifted smoothly and slowly to a height that the hand chain hoist cannot lift, install 4 sets of threaded rods, install 2 sets of reaction seats on the threaded rods, and then tighten them with double nuts under the reaction seats; S27: Place 4 sets of claw hydraulic jacks on the reaction seat, pull the chain hoist to lower the beam bottom damper component onto the claw hydraulic jacks, and then use the claw hydraulic jacks to lift the beam bottom damper component to the installation position and tighten the bolts.

[0012] In some embodiments, step S3 includes: S31: The lifting vehicle enters the construction area where the pier damper components are installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the pier damper embedded parts. S32: Place a set of reaction force lifting devices on the top of the pier, and place a jack at the tail of the reaction force lifting devices. Use the jack to do work to make the reaction force lifting devices have sufficient stability to ensure that they will not become unstable and fall when the pier damper components are lifted by the hand chain hoist. S33: Hang a hand chain hoist at the front end of the reaction-type lifting device, hook the lower hook of the hand chain hoist to the reserved lifting point of the pier damper component, and pull the chain hoist smoothly and slowly to make the chain hoist bear the force. S34: Pull the chain hoist smoothly and slowly to lift the pier damper component. When it reaches the designated height, manually adjust it to align with the bolt holes, and then tighten the bolts.

[0013] In some embodiments, when installing the transverse bridge damper crossbar, step S4 includes: S41: The lifting vehicle enters the construction area where the damper crossbar is installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the damper component at the bottom of the beam. S42: Install the bolt lifting device at the pre-installed position, and then hang the hand chain hoist on the bolt lifting device; S43: Then lift the construction workers to the vicinity of the pier damper component, install the insert-type lifting device on the pier damper component, adjust its direction, and then hang the hand chain hoist at the reserved lifting lug of the insert-type lifting device. S44: Hang the other hook of the hand chain hoist on the side of the damper component at the bottom of the beam on the lug of the damper crossbar. Install the disc-type lifting device in the connection hole at the other end of the damper crossbar and hang it on the hook of the hand chain hoist on the side of the damper component at the pier. Pull the chain hoist chain smoothly and slowly to make the chain hoist chain bear the force. S45: Pull the chain hoist smoothly and slowly to lift the damper crossbar smoothly and slowly. When it is lifted to the designated height, manually adjust and align it with the connection hole. First, connect it with the damper component at the bottom of the beam. Then, adjust the damper crossbar to connect it with the damper component at the pier column. In some embodiments, when installing the longitudinal bridge damper crossbar, step S4 includes: S41: The lifting vehicle enters the construction area where the damper crossbar is installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the damper component at the bottom of the beam. S42: Install a hand-operated hoist at the reserved lifting lug; S43: Then lift the construction workers to the vicinity of the pier damper component, install a set of bolted lifting tools on the pier damper component, and then hang a set of hand chain hoists at the reserved lifting lugs of the bolted lifting tools. S44: Hang the other hook of the hand chain hoist on the lug of the damper crossbar, and pull the chain hoist smoothly and slowly on the damper crossbar to make the chain hoist bear the force. S45: Pull the chain hoist smoothly and slowly to raise the damper crossbar smoothly and slowly. When it is raised to the positioning height, manually adjust and align it with the connection hole. First, connect it with the damper component at the bottom of the beam. Then, adjust the damper crossbar to connect it with the damper component at the pier column.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention addresses the challenges of installing large dampers for cable-stayed bridges in high-intensity seismic zones under low-clearance and restricted working conditions. It designs a specialized hoisting and installation device system adaptable to multiple scenarios and develops a standardized hoisting and installation method for the entire process. This completely breaks through the limitations of traditional hoisting processes and effectively solves the core problems in existing technologies, such as the inability of large hoisting equipment to enter the site, the inability to carry out low-clearance operations, high construction costs, low work efficiency, high safety risks, and difficulty in ensuring installation accuracy. It achieves safe, accurate, and efficient installation of dampers under complex working conditions. Attached Figure Description

[0015] Figure 1 A schematic diagram of the installation of the beam bottom damper components (hand-operated hoist lifting stage); Figure 2 A schematic diagram of the installation of the beam bottom damper components (claw hydraulic jack lifting stage); Figure 3 A schematic diagram of the installation of the pier damper components (transverse bridge components); Figure 4 A schematic diagram of the installation of the pier damper components (longitudinal bridge components); Figure 5 A schematic diagram of the installation of the damper crossbar (transverse bridge component); Figure 6 A schematic diagram of the installation of the damper crossbar (longitudinal bridge component); In the figure, 1-beam bottom damper embedded part, 2-pier column damper embedded part, 3-beam bottom damper component, 4-pier column damper component, 5-damper crossbar, 7-bolt lifting tool, 8-through threaded rod, 9-reaction seat, 10-reaction type lifting tool, 11-bolted type lifting tool, 12-insertion type lifting tool, 13-circular disc type lifting tool. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] A large damper hoisting device for a cable-stayed bridge in a high-intensity seismic zone with low headroom and confined environment includes: damper embedded parts, which include: a beam bottom damper embedded part 1, which is embedded in the bottom of the beam and used to connect and install the beam bottom damper component 3; a pier column damper embedded part 2, which is embedded in the pier column and used to connect and install the pier column damper component 4; and a hoisting assembly, which includes: a bolt hoisting tool 7, which is made of M12.8 bolts with a length of 10cm and a diameter of 30mm. The system consists of welded lifting lugs, symmetrically installed at four corners within the bolt holes of the beam bottom damper embedded part 1, with the lugs facing downwards. A hand-operated hoist is attached for hoisting the beam bottom damper component 3. A threaded rod 8, 1.2m long, φ30mm, M12.8, passes through the bolt holes of the beam bottom damper component 3 and is installed on the beam bottom damper embedded part 1. It provides positioning and tension for secondary lifting of the beam bottom damper component 3. A reaction seat 9, located at the lower end of the threaded rod 8, provides upward support for the jack to lift the beam bottom damper component 3. The system also includes a reaction-type hoist. The reaction-type lifting device 10 has a "Z"-shaped structure and is installed on the top of the pier. A hydraulic jack is installed at the tail of the lifting device 10 to form a reliable counterweight anchoring system with the beam. A lifting lug is provided at the front end to hang a hand-operated hoist for lifting the pier damper embedded part 2. The bolted lifting device 11 has a triangular structure with a welded embedded plate at the bottom. It is installed above the pier damper component 4 using bolt holes on the pier damper embedded part 2. A lifting lug is provided at the front end to hang a hand-operated hoist for lifting the longitudinal damper crossbar 5. The insertion-type lifting device 12... The insert-type lifting device 12 has a triangular structure, with a cylindrical internal cross steel plate for vertical support. It is installed in the pin hole of the pier damper component 4. The front end of the lifting device is equipped with a lifting lug for hanging a hand-operated hoist to lift the transverse damper crossbar 5 of the bridge. The disc-type lifting device 13 has a diameter 3cm larger than the diameter of the pin hole of the damper crossbar 5 and a thickness of 1.5cm. The top of the disc-type lifting device is welded with a lifting lug, which is set below the pin hole of the damper crossbar 5. The hand-operated hoist passes through the pin hole of the damper crossbar 5, and the hook is hung on the lifting lug of the disc-type lifting device 13 for lifting the damper crossbar 5.

[0018] The upper end of the through rod 8 is connected to the embedded part of the damper at the bottom of the beam, and the lower end passes through the reaction seat 9 and is locked and fixed by double nuts, forming the vertical bearing reaction structure of the claw hydraulic jack.

[0019] The main body of the reaction-type lifting device 10 is mounted on the top surface of the pier column, and a jack is provided at its tail. The jack supports the side wall of the pier column to achieve the anchoring and limiting of the reaction-type lifting device 10. The front end of the reaction-type lifting device 10 is provided with a lifting lug for hanging a hand chain hoist.

[0020] Bolted lifting device 7 is adapted to connect the lifting points of the pre-embedded parts at the bottom of the beam and the damper assembly at the bottom of the beam; bolted lifting device 11 is adapted to set the lifting points of the pier damper assembly when installing the longitudinal bridge damper crossbar; inserted lifting device 12 is adapted to set the lifting points of the pier damper assembly when installing the transverse bridge damper crossbar; disc-shaped lifting device 13 is adapted to connect the lifting points of the end connection holes of the damper crossbar.

[0021] A method for hoisting and constructing large dampers for cable-stayed bridges in high-intensity seismic zones under low headroom and confined environments includes the following steps: S1: Construction preparation before damper installation; S2: Installation of damper components at the bottom of the beam; S3: Installation of damper components at the piers; S4: Installation of damper crossbars; S5: Damper commissioning and finished product protection.

[0022] In a specific embodiment, step S1 includes: S11: Technical Preparation 1) Organize all technical personnel and construction team leaders of the project department to conduct a detailed review of the design drawings and technical briefings, and clarify the core parameters of the damper, such as model, specifications (including maximum damping force and design stroke), installation position, angle and connection method.

[0023] 2) Prepare a special construction plan for the installation of large dampers for cable-stayed bridges in high-intensity seismic zones with low clearance and confined environments, and a special safety plan for the hoisting of large-tonnage dampers. Complete the approval procedures according to the process to ensure that the plans are targeted and operable.

[0024] 3) Establish a high-precision construction measurement control network to provide accurate benchmarks for the positioning and layout of embedded parts, and ensure the accuracy of subsequent installation measurement work.

[0025] S12: On-site preparation: 1) Thoroughly clean the work area, remove debris and obstacles, and ensure that there is sufficient construction space and material storage area in the work area to meet the needs of construction flow.

[0026] 2) Plan the entry route and work site of large hoisting equipment (such as truck cranes and scissor lifts) in advance, and at the same time check and implement the site foundation bearing capacity requirements, and take reinforcement measures when necessary to ensure hoisting safety.

[0027] 3) Erect safe and reliable supporting safety protection facilities. The protection facilities must comply with construction safety specifications and provide a safe working environment for workers.

[0028] S13: Material and Equipment Preparation 1) Strictly verify the factory certificate of conformity, type test report and third-party test report for core components such as damper body, embedded parts (sleeves, anchor plates), high-strength bolts, and pins to ensure that the information is complete and qualified.

[0029] 2) On-site verification of key dimensions of components, and comprehensive visual inspection to check for potential damage during transportation. Only after confirming that there are no quality issues can the components be put into use.

[0030] 3) Equip with various tools and equipment to meet the requirements of construction accuracy and operation, including total station, level (for measurement), torque wrench, hydraulic jack (for installation and debugging), special lifting tools (self-developed special lifting tools for hoisting), electric welding machine, angle grinder (for auxiliary processing), etc.

[0031] 4) Debug, calibrate and maintain all equipment in advance to ensure that the equipment is in good working order and meets the accuracy standards, so as to avoid affecting the construction progress and quality due to equipment failure.

[0032] S14: Surveyors will utilize the established high-precision construction survey control network and precision surveying equipment such as total stations and levels to comprehensively verify the core positional parameters of the damper's embedded parts. The verification will focus on the center coordinates, installation elevation, levelness, verticality, and relative positional relationship with adjacent components of the embedded parts, strictly adhering to the standard values ​​specified in the design drawings and technical specifications. This ensures the damper's installation accuracy from the outset, preventing installation failures or unsatisfactory stress levels due to embedded part positional deviations. S15: Clean the slurry inside the holes of the embedded parts to ensure internal cleanliness, so that the bolts can fully fit the inner wall of the hole when the damper is installed, improve the anchoring strength, and effectively prevent safety hazards caused by bolt loosening during later use.

[0033] S16: A weight verification operation is conducted for each core component and matching connector, including the damper body, embedded parts (sleeves, anchor plates), high-strength bolts, and pins. The verification method employs a dual approach of "data comparison + on-site measurement." First, the theoretical weight is confirmed by comparing it with technical documents such as the component's factory certificate of conformity and weight list. Then, on-site measurements are performed using calibrated electronic crane scales, weighbridges, and other weighing equipment. The actual weight of each type of component is recorded. For components where the theoretical and measured weights differ, the reasons for the deviation are analyzed, and it is confirmed whether the deviation is within the allowable range. Combining the verified weight of individual components with the combined weight during hoisting (such as the combined hoisting of dampers and embedded parts, and the coordinated hoisting of multiple components), the core parameters of the hand-operated hoist are accurately calculated, including rated lifting capacity, stroke, and safety factor. When calculating, a safety margin of no less than three times must be reserved. Simultaneously, considering the lifting angle and stress distribution, the model, quantity, and arrangement of the hand-operated hoists must be determined to ensure that the load-bearing capacity of the selected hoists fully covers the total lifting weight and complies with the safety requirements of the special plan for lifting cable-stayed bridges in high-intensity seismic zones. The calculation results must be reviewed and signed by the technical supervisor and serve as a crucial basis for lifting operations, preventing safety accidents such as lifting instability and component falls caused by mismatched hand-operated hoist parameters.

[0034] Specifically, step S2 includes: S21: The lifting vehicle enters the construction area where the bottom damper components of the beam are installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the embedded parts of the bottom damper of the beam. S22: Install 4 sets of bolt lifting devices 7 while ensuring that it does not interfere with subsequent work conditions, and then hang 4 sets of hand chain hoists on the 4 sets of bolt lifting devices 7 respectively; S23: Install 4 sets of bolt lifting devices 7 at the positions of the embedded parts of the beam bottom damper, corresponding to the positions of the beam bottom damper components, with the lifting points facing upwards; S24: Hook the lower hook of the hand chain hoist onto the 4 sets of bolt lifting devices 7 of the damper component at the bottom of the beam, and pull the 4 sets of hand chain hoist chains smoothly and slowly to make the hand chain hoist chains bear the force. S25: Smoothly and slowly pull the four sets of hand chain hoists to lift the damper components at the bottom of the beam. S26: When the damper component at the bottom of the beam is lifted smoothly and slowly to a height that the hand-operated hoist cannot lift, install 4 sets of threaded rods 8, install 2 sets of reaction seats 9 on the threaded rods 8, and then tighten them with double nuts under the reaction seats 9.

[0035] S27: Place 4 sets of claw hydraulic jacks on the reaction seat 9, pull the chain hoist to lower the beam bottom damper component onto the claw hydraulic jacks, and then use the claw hydraulic jacks to lift the beam bottom damper component to the installation position and tighten the bolts.

[0036] Step S3 includes: S31: The lifting vehicle enters the construction area where the pier damper components are installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the pier damper embedded parts. S32: Place a set of reaction-type lifting devices 10 on the top of the pier, and place a set of jacks at the tail of the reaction-type lifting devices 10. Use the jacks to do work to make the reaction-type lifting devices 10 have sufficient stability to ensure that they will not become unstable and fall when the hand-operated hoist lifts the pier damper components. S33: Hang a set of hand chain hoists at the front end of the reaction type lifting device 10, hook the lower hook of the hand chain hoist to the reserved lifting point of the pier damper component, and pull the chain hoist smoothly and slowly to make the chain hoist bear the force. S34: Pull the chain hoist smoothly and slowly to lift the pier damper component. When it reaches the designated height, manually adjust it to align with the bolt holes, and then tighten the bolts.

[0037] Step S4 includes two working conditions: transverse and longitudinal bridge directions, specifically including: When installing the transverse bridge damper crossbar: S41: The lifting vehicle enters the construction area where the damper crossbar is installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the damper component at the bottom of the beam. S42: Install a set of bolt lifting tools 7 at the pre-installation position, and then hang a set of hand chain hoists on the bolt lifting tools 7; S43: Then lift the construction workers to the vicinity of the pier damper component, install a set of insert-type lifting devices 12 on the pier damper component, adjust its direction, and then hang a set of hand chain hoists at the reserved lifting lugs of the insert-type lifting devices 12. S44: Hang the other hook of the hand chain hoist on the side of the damper component at the bottom of the beam on the lug of the damper crossbar. Install a set of disc-type lifting devices 13 in the connection hole at the other end of the damper crossbar and hang them on the hook of the hand chain hoist on the side of the damper component at the pier. Pull the two sets of hand chain hoist chains smoothly and slowly to make the hand chain hoist chains bear the force. S45: Pull the two sets of hand chain hoists smoothly and slowly to lift the damper crossbar smoothly and slowly. When it is lifted to the positioning height, manually adjust and align it with the connection hole. First, connect it with the damper component at the bottom of the beam. Then, adjust the damper crossbar to connect it with the damper component at the pier column. When installing the longitudinal bridge damper crossbar: S41: The lifting vehicle enters the construction area where the damper crossbar is installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the damper component at the bottom of the beam. S42: Install one set of hand chain hoists at the reserved lifting lugs; S43: Then lift the construction workers to the vicinity of the pier damper component, install a set of bolted lifting tools 11 on the pier damper component, and then hang a set of hand chain hoists at the reserved lifting lugs of the bolted lifting tools 11. S44: Hang the other hook of the two sets of hand chain hoists on the lug of the damper crossbar, and pull the two sets of hand chain hoists smoothly and slowly on the damper crossbar to make the hand chain hoists bear the force. S45: Smoothly and slowly pull the two sets of hand chain hoists to raise the damper crossbar smoothly and slowly. When it is raised to the designated height, manually adjust and align it with the connection hole. First, connect it with the damper component at the bottom of the beam. Then, adjust the damper crossbar to connect it with the damper component at the pier column.

[0038] In addition, if the construction environment meets the requirements for truck crane lifting operations, the truck crane can first lift the damper crossbar to the predetermined height, and then a hand chain hoist can be used for lifting operations.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hoisting and installation device for a large damper on a cable-stayed bridge in a high-intensity seismic zone under low clearance and confined conditions, characterized in that, include: Damper embedded part, the damper embedded part includes: Beam bottom damper embedded part (1), the beam bottom damper embedded part (1) is embedded in the bottom of the beam and is used to connect and install the beam bottom damper component (3). Pier damper embedded part (2), the pier damper embedded part (2) is embedded on the pier and is used to connect and install the pier damper component (4). The lifting device assembly includes: Bolt lifting device (7), which is installed between the beam bottom damper embedded part (1) and the beam bottom damper component (3), is used to lift the beam bottom damper component (3). A through screw (8) is installed between the pre-embedded part (1) of the bottom damper and the bottom damper component (3) for secondary hoisting of the bottom damper component (3). The reaction seat (9) is set at the lower end of the through screw (8) to support the pre-embedded part (1) of the beam bottom damper. A reaction-type lifting device (10) is installed on the top of the pier column and is used to lift the pier column damper embedded part (2). Bolted lifting device (11), which is installed on the pier column damper component and is used to hang the hand chain hoist to lift the damper crossbar (5) in the longitudinal direction of the bridge. Insertion-type lifting device (12), which is installed on the pier column damper component and is used to hang a hand chain hoist to lift the transverse damper crossbar (5) of the bridge. A disc-shaped lifting device (13) is provided at the end of the damper crossbar (5).

2. The large damper hoisting and installation device for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments as described in claim 1, characterized in that, The upper end of the through rod (8) is connected to the pre-embedded part of the damper at the bottom of the beam, and the lower end passes through the reaction seat (9) and is locked and fixed by double nuts to form the vertical bearing reaction structure of the claw hydraulic jack.

3. The large damper hoisting and installation device for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments as described in claim 1, characterized in that, The main body of the reaction lifting device (10) is mounted on the top surface of the pier column, and a jack is provided at its tail. The jack supports the side wall of the pier column to achieve the anchoring and limiting of the reaction lifting device (10). The front end of the reaction lifting device (10) is provided with a lifting lug for hanging a hand chain hoist.

4. The large damper hoisting and installation device for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments as described in claim 1, characterized in that, The bolt lifting tool (7) is adapted to the lifting point connection between the pre-embedded part at the bottom of the beam and the damper assembly at the bottom of the beam; the bolted lifting tool (11) is adapted to the lifting point setting of the pier damper assembly when installing the longitudinal bridge damper crossbar; the insert lifting tool (12) is adapted to the lifting point setting of the pier damper assembly when installing the transverse bridge damper crossbar; the disc lifting tool (13) is adapted to the lifting point connection of the end connection hole of the damper crossbar.

5. A method for hoisting and constructing large dampers for cable-stayed bridges in high-intensity seismic zones under low-clearance and confined environments, characterized in that... The implementation based on the hoisting device according to any one of claims 1-4 includes the following steps: S1: Construction preparations before damper installation; S2: Installation of the beam bottom damper assembly; S3: Installation of pier damper assembly; S4: Damper crossbar installation; S5: Damper adjustment and finished product protection.

6. The method for hoisting and constructing large dampers for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments, as described in claim 5, is characterized in that... Step S1 includes: S11: Technical preparation, complete drawing review and technical briefing, clarify the core parameters of the damper; prepare and approve special construction plan and safety plan; establish a high-precision construction measurement and control network; S12: On-site preparation, cleaning the work surface, planning the entry route and station site for construction equipment, checking and reinforcing the foundation of the work site, and erecting safety protection facilities that meet the specifications. S13: Material and equipment preparation, check the quality certification documents of dampers and supporting components, verify the dimensions and appearance of components, and configure and test the measuring, hoisting, fastening and auxiliary processing equipment required for construction. S14: Verification and cleaning of embedded parts. Based on the measurement and control network, verify the core position parameters of the damper embedded parts, clean the grout in the holes of the embedded parts, and ensure the installation accuracy and anchoring strength. S15: Determine the hoisting parameters, verify the component weight by comparing data and on-site measurement, calculate the core parameters of the hand chain hoist in combination with the hoisting conditions, reserve a safety margin of no less than 3 times, and determine the model, quantity and arrangement of the hand chain hoist.

7. The method for hoisting and constructing large dampers for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments, as described in claim 5, is characterized in that... Step S2 includes: S21: The lifting vehicle enters the construction area where the bottom damper components of the beam are installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the embedded parts of the bottom damper of the beam. S22: Install 4 sets of bolt lifting tools (7) while ensuring that it does not interfere with subsequent working conditions, and then hang 4 sets of hand chain hoists on the 4 sets of bolt lifting tools (7); S23: Install 4 sets of bolt lifting tools (7) at the position of the embedded bolt lifting tool (7) of the bottom damper, corresponding to the position of the bottom damper component, with the lifting point facing upward; S24: Hook the lower hook of the hand chain hoist onto the 4 sets of bolt hangers (7) of the damper component at the bottom of the beam, and pull the 4 sets of hand chain hoists smoothly and slowly to make the hand chain hoist bear the force. S25: Smoothly and slowly pull the four sets of hand chain hoists to lift the damper components at the bottom of the beam. S26: When the damper component at the bottom of the beam is lifted smoothly and slowly to a height that the hand chain hoist cannot lift, install 4 sets of threaded rods (8), install 2 sets of reaction seats (9) on the threaded rods (8), and then tighten the reaction seats (9) with double nuts. S27: Place 4 sets of claw hydraulic jacks on the reaction seat (9), pull the chain hoist to lower the beam bottom damper component onto the claw hydraulic jack, and then use the claw hydraulic jack to lift the beam bottom damper component to the installation position and tighten the bolts.

8. The method for hoisting and constructing large dampers for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments, as described in claim 5, is characterized in that... Step S3 includes: S31: The lifting vehicle enters the construction area where the pier damper components are installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the pier damper embedded parts. S32: Place a set of reaction-type lifting devices (10) on the top of the pier, and place a jack at the tail of the reaction-type lifting device (10). Use the jack to do work so that the reaction-type lifting device (10) has sufficient stability to ensure that it will not become unstable and fall when the hand-operated hoist lifts the pier damper component. S33: Hang a hand chain hoist at the front end of the reaction type lifting device (10), hang the lower hook of the hand chain hoist to the reserved lifting point of the pier damper component, and pull the hand chain hoist chain smoothly and slowly so that the hand chain hoist chain is stressed. S34: Pull the chain hoist smoothly and slowly to lift the pier damper component. When it reaches the designated height, manually adjust it to align with the bolt holes, and then tighten the bolts.

9. The method for hoisting and constructing large dampers for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments, as described in claim 5, is characterized in that... When installing the transverse bridge damper crossbar, step S4 includes: S41: The lifting vehicle enters the construction area where the damper crossbar is installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the damper component at the bottom of the beam. S42: Install the bolt lifting device (7) at the pre-installed position, and then hang a hand chain hoist on the bolt lifting device (7); S43: Then lift the construction workers to the vicinity of the pier damper component, install the insert-type lifting device (12) on the pier damper component, adjust its direction, and then hang the hand hoist at the reserved lifting lug of the insert-type lifting device (12); S44: Hang the other hook of the hand chain hoist on the side of the damper component at the bottom of the beam on the lug of the damper crossbar, install the disc type lifting device (13) in the connection hole at the other end of the damper crossbar, and hang it on the hook of the hand chain hoist on the side of the damper component at the pier column. Pull the chain hoist smoothly and slowly to make the chain hoist bear the force. S45: Pull the chain hoist smoothly and slowly to lift the damper crossbar smoothly and slowly. When it is lifted to the designated height, manually adjust and align it with the connection hole. First, connect it with the damper component at the bottom of the beam. Then, adjust the damper crossbar to connect it with the damper component at the pier column.

10. The method for hoisting and constructing large dampers for cable-stayed bridges in high-intensity seismic zones under low clearance and confined environments, as described in claim 5, is characterized in that... When installing the longitudinal bridge damper crossbar, step S4 includes: S41: The lifting vehicle enters the construction area where the damper crossbar is installed, starts the lifting arm, and after the construction personnel have taken safety precautions, lifts it to the vicinity of the damper component at the bottom of the beam. S42: Install a hand-operated hoist at the reserved lifting lug; S43: Then lift the construction workers to the vicinity of the pier damper component, install a set of bolted lifting tools (11) on the pier damper component, and then hang a set of hand chain hoists at the reserved lifting lugs of the bolted lifting tools (11). S44: Hang the other hook of the hand chain hoist on the lug of the damper crossbar, and pull the chain hoist smoothly and slowly on the damper crossbar to make the chain hoist bear the force. S45: Pull the chain hoist smoothly and slowly to raise the damper crossbar smoothly and slowly. When it is raised to the positioning height, manually adjust and align it with the connection hole. First, connect it with the damper component at the bottom of the beam. Then, adjust the damper crossbar to connect it with the damper component at the pier column.

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