Method for installing steel cross beams of steel-concrete composite beam cable-stayed bridge

Abstract

The invention discloses a steel-concrete composite beam cable-stayed bridge steel cross beam installation method, and relates to the technical field of bridge construction, the method comprises the following steps: S1, presetting a plurality of steel cross beam sections under a bridge, each steel cross beam section comprising a plurality of pre-assembled small longitudinal beams, S2, transporting each steel cross beam section to a construction bridge site from the ground or the water surface by using a large hoisting device, the method comprises the steps of S1, sequentially installing steel cross beam sections in place through a connecting device section by section to ensure that the steel cross beam sections are in accurate butt joint with the previous sections, S2, fixing the steel cross beam sections to form a complete steel cross beam framework after the steel cross beam sections are installed, and S5, detecting and adjusting the connecting parts after the installation is completed to form a complete steel cross beam framework. The stability and the connection strength of the steel cross beam are ensured; according to the steel-concrete composite beam cable-stayed bridge steel cross beam installation method, the dependence on a construction site and equipment can be reduced, the construction efficiency is improved, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a method for installing a steel cross beam of a steel-concrete composite beam cable-stayed bridge. Background Art

[0002] As an important structural form in modern bridge engineering, cable-stayed bridges are widely used in long and large bridges, cross-sea bridges and other fields due to their advantages such as large span and light structure. One of the main load-bearing structures of cable-stayed bridges is the steel-concrete composite beam main girder, which is usually composed of concrete beam ribs, steel cross beams, bridge decks installed on top of steel cross beams, and post-cast wet joint concrete. The steel cross beams are connected to each other through multiple small longitudinal beams to form a complete load-bearing system.

[0003] During the construction of cable-stayed bridges, the installation method of the main beam of steel-concrete composite beams is relatively complicated, involving a combination of two construction methods: cantilever pouring construction and cantilever splicing construction. Specifically, the concrete main beam usually adopts the cantilever pouring construction method, first pouring concrete at the pier or bridge support position, and then gradually forming the structure of the main beam. The steel main beam is constructed by cantilever splicing, that is, it is assembled in sections on the ground, and then transported to the construction site by water or bridge deck, and each section of the steel cross beam is directly installed in place using large lifting equipment such as floating cranes and bridge deck cranes. The existing installation method of the main beam of steel-concrete composite beams mainly relies on setting up an assembly platform under the bridge, and requires the configuration of lifting equipment such as cranes, transport vehicles and ships. This construction method faces several shortcomings. First, it is necessary to pre-build an assembly platform at the construction site, which occupies a large amount of construction space. Secondly, the construction equipment requirements are high. In addition to conventional cranes and transport vehicles, large floating cranes and bridge deck cranes are also required, and the tonnage load requirements of cranes and floating cranes are high, which makes the construction process limited by the site and equipment capacity. Summary of the invention

[0004] The object of the present invention is to provide a method for installing steel cross beams of a steel-concrete composite beam cable-stayed bridge, which can reduce the dependence on construction sites and equipment, improve construction efficiency, and reduce construction costs.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for installing a steel cross beam of a steel-concrete composite beam cable-stayed bridge, the method comprising:

[0006] S1. Preset multiple steel beam sections under the bridge, each of which includes multiple pre-assembled small longitudinal beams;

[0007] S2. Use large-scale lifting equipment to transport each steel beam segment from the ground or water surface to the construction site;

[0008] S3. Install each steel beam section in place one by one through the connecting device in sequence, ensuring that the steel beam section is accurately connected with the previous section;

[0009] S4. After each steel beam segment is installed, the steel beam segments are fixed to form a complete steel beam structure;

[0010] S5. After installation, each connection point shall be inspected and adjusted to ensure the stability and connection strength of the steel beam.

[0011] Preferably, the steel cross beam segment in S1 includes pre-fixed small longitudinal beams, each of which is multiple in number, and both ends of each small longitudinal beam are fixedly connected to adjacent steel cross beam segments via connecting plates.

[0012] Preferably, the medium-to-large lifting equipment S2 is a floating crane or a bridge crane, and during the lifting process, the lifting equipment has an adjustment device for adjusting the position of the steel beam section to ensure the accuracy of the installation of the steel beam section.

[0013] Preferably, the connecting device in S3 includes steel cables, connecting plates and bolts, wherein the steel cables are used to position the steel beam segments during lifting, and the connecting plates are connected to adjacent steel beam segments by bolts to ensure that each steel beam segment is accurately docked.

[0014] Preferably, the steel beam section is fixed in S4 by welding or bolting, and each connection point is connected with high-strength steel or alloy steel to improve the tensile strength and stability of the structure.

[0015] Preferably, the detection of the connection parts in S5 includes using a laser rangefinder, a displacement sensor or a strain gauge to perform precise measurement to ensure the docking accuracy and mechanical stability of the steel beam section after installation.

[0016] Preferably, the laser rangefinder and displacement sensor are respectively installed on the installation platform and the lifting equipment to monitor the installation position of the steel beam section in real time.

[0017] Preferably, the hook part of the lifting equipment in S2 is equipped with multiple adjustment devices for accurately controlling the hanging angle and horizontal position of the steel beam section.

[0018] Preferably, when the steel beam section in S2 is transported to the construction bridge site, a transport vehicle or ship is used, and an anti-tilt device is used during transportation to ensure the stability of the steel beam section during transportation.

[0019] Preferably, the transportation of the steel beam segments in S1 includes two modes: segmented transportation and overall transportation. During segmented transportation, each steel beam segment is temporarily fixed by a connecting device, and an anti-shock device is used during transportation to prevent displacement or damage during transportation. The anti-shock device includes a spring gasket and a hydraulic support device, which is used to alleviate external vibrations during transportation.

[0020] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0021] The steel-concrete composite beam cable-stayed bridge steel beam installation method is as follows: a plurality of steel beam sections are preset under the bridge, each steel beam section includes a plurality of pre-assembled small longitudinal beams, each steel beam section is transported from the ground or water surface to the construction bridge position by large-scale hoisting equipment, each steel beam section is installed in place in sequence through a connecting device, and the steel beam section is ensured to be accurately docked with the previous section. After each steel beam section is installed, each steel beam section is fixed to form a complete steel beam structure. After the installation is completed, each connection part is tested and adjusted to ensure the stability and connection strength of the steel beam, thereby reducing the dependence on a special assembly platform. The prior art requires the construction site to set up an assembly platform that occupies a large amount of space, while the present invention can complete the installation without relying on a large assembly platform through precise hoisting and position adjustment technology, greatly saving the use of the construction site, optimizing the use of hoisting equipment, and being able to use more economical equipment for construction, thereby reducing the overall construction cost and avoiding structural instability caused by docking errors. By introducing modern measuring equipment, such as laser rangefinders and displacement sensors, the position of the steel beam segments can be monitored and adjusted in real time, the installation accuracy can be improved, the stability and safety of the steel beams can be ensured, and the installation time of the steel beam segments can be effectively shortened. At the same time, since the reliance on complex equipment and assembly platforms is reduced, operations can be carried out in a more compact construction environment, which improves the flexibility and efficiency of construction, thereby effectively shortening the project cycle, reducing noise, waste and air pollution during the construction process, and thus reducing the negative impact on the surrounding environment. In addition, the optimized transportation method also helps to reduce environmental pollution during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a method for installing a steel cross beam of a steel-concrete composite beam cable-stayed bridge comprises:

[0025] S1. Preset multiple steel beam sections under the bridge, each of which includes multiple pre-assembled small longitudinal beams;

[0026] S2. Use large-scale lifting equipment to transport each steel beam segment from the ground or water surface to the construction site;

[0027] S3. Install each steel beam section in place one by one through the connecting device in sequence, ensuring that the steel beam section is accurately connected with the previous section;

[0028] S4. After each steel beam segment is installed, the steel beam segments are fixed to form a complete steel beam structure;

[0029] S5. After installation, each connection point shall be inspected and adjusted to ensure the stability and connection strength of the steel beam.

[0030] The steel beam installation method of the present invention relies on preset steel beam sections and adopts the installation technology of segmented hoisting and precise docking. Each steel beam section is composed of a plurality of pre-assembled small longitudinal beams, which are pre-assembled on the ground or on the water surface, thereby ensuring the stability and accuracy of the steel beam section during hoisting. The hoisting equipment transports the steel beam section from the preset location to the construction bridge position and hoists it to the designated position section by section. During hoisting, each section of the steel beam is docked with the previous section through a high-precision connecting device to ensure the connection accuracy between each section of the steel beam. After all the steel beam sections are installed, they are further fixed by the connecting device to ensure the overall stability of the steel beam. Finally, by comprehensively testing and adjusting the connection parts, the strength and stability of each connection point are ensured to avoid the influence of construction errors. The present invention has many beneficial effects. First, by assembling the steel beam sections under the bridge in advance, not only the installation accuracy is improved, but also the time of on-site construction can be effectively shortened, thereby improving the construction efficiency. Secondly, the combination of the hoisting equipment and the precise docking device reduces human operation errors, ensures the precise docking of the steel beam section with the previous section, and improves the safety of the bridge structure. Through fine connection and debugging, the stability and connection strength of the steel beam structure are ensured, and the overall bearing capacity of the bridge is improved. In addition, the installation method of the present invention can also be operated in complex construction environments, has good adaptability, and can meet the needs of different bridge construction.

[0031] The pre-assembly of the steel beam segments can be carried out through different connection methods, including bolt connection, welding or other types of fixing methods; the lifting equipment can be selected according to the actual situation. Cranes or ship cranes of different specifications are used, especially for bridges located on water. The installation sequence can also be adjusted according to the actual needs of the construction site. It does not have to be strictly carried out in the preset sequence, as long as the connection accuracy and structural stability between the steel beam segments are guaranteed. In addition, the connection device can use different types of high-precision docking tools such as hydraulic systems and tensioning devices according to specific construction requirements to further improve installation accuracy and efficiency.

[0032] The steel beam section in S1 includes a pre-fixed small longitudinal beam, each of which is a plurality of small longitudinal beams, and the two ends of each small longitudinal beam are fixedly connected to the adjacent steel beam section through a connecting plate. In an embodiment of the present invention, the steel beam section enhances the stability and load-bearing capacity of the overall structure by the pre-fixed small longitudinal beams. Each steel beam section is composed of a plurality of small longitudinal beams, and the two ends of these small longitudinal beams are fixedly connected to the adjacent steel beam section through a connecting plate. During the installation process, these small longitudinal beams can provide additional support force, making the steel beam section more stable during transportation and hoisting, and avoiding deformation or position displacement of the steel beam section due to weight or vibration. The use of the connecting plate not only simplifies the installation process, but also ensures the close connection between each small longitudinal beam and the steel beam section, and ensures the strength and stability of the connection. After the steel beam section arrives at the installation position, it is accurately installed using high-precision docking equipment and hoisting equipment to ensure the correct docking and fixation of the small longitudinal beam with the adjacent steel beam section. The present invention significantly improves the overall stability of the steel beam segment by pre-fixing a plurality of small longitudinal beams in the steel beam segment and fixing the two ends thereof with adjacent steel beam segments through connecting plates. During transportation and hoisting, the cooperation between the small longitudinal beams and the connecting plates makes it difficult for the steel beam segment to deform or tilt during hoisting, thereby improving the accuracy and safety of installation. At the same time, the design of the connecting plate simplifies the construction process, reduces on-site welding or bolt connection work, and reduces the construction difficulty and construction period. The method can also enhance the overall rigidity of the steel beam segment, improve the bearing capacity and durability of the steel beam structure in the cable-stayed bridge, and ensure the long-term stability of the bridge.

[0033] The small longitudinal beams of the steel beam section can also be connected in different ways according to specific construction needs. For example, in addition to the connecting plate, high-strength bolts, hinged devices and other methods can also be used for connection to meet the needs of different bridge designs and construction environments. In addition, the number and size of the small longitudinal beams can also be adjusted according to actual conditions to adapt to steel beam sections with different spans and load requirements. For some special environments, such as oceans or high-temperature areas, the materials of the connecting plates and small longitudinal beams can be selected from more corrosion-resistant or high-temperature resistant alloy materials to improve the corrosion resistance and durability of the structure.

[0034] S2 medium and large lifting equipment is a floating crane or a bridge crane, and during the lifting process, the lifting equipment has an adjustment device for adjusting the position of the steel beam segment to ensure the accuracy of the installation of the steel beam segment. In the present invention, a floating crane or a bridge crane is used as a large lifting equipment during the lifting process. The floating crane or the bridge crane can transport the steel beam segment from the ground or the water surface to the bridge construction site through its powerful lifting capacity. In order to ensure the installation accuracy of the steel beam segment, the lifting equipment is equipped with an adjustment device, which can adjust the position of the steel beam segment during the lifting process in real time to ensure the docking accuracy with the previous section of the steel beam. The adjustment device includes a hydraulic system, an adjustment hook, and an automatic positioning system, etc. Through precise sensors and control systems, the lifting equipment can fine-tune its position when the steel beam segment is lifted in place, so as to achieve the precise installation effect required by the design. The adjustment device not only improves the lifting accuracy, but also reduces human errors, ensuring the smooth installation and precise docking of each steel beam segment. The steel beam installation method of the present invention has significant beneficial effects. First, the use of floating cranes or bridge cranes as lifting equipment can effectively cope with the lifting needs of large-span and heavy steel beam sections, ensuring the safety and efficiency of the lifting operation. Secondly, the adjustment device of the lifting equipment can accurately control the position of the steel beam section during the lifting process, achieving high-precision installation, thereby ensuring the precise docking of the steel beam section with the previous section. Through the adjustment device, the lifting operation can achieve real-time adjustment and fine-tuning, improving installation accuracy and construction safety. Finally, the use of the adjustment device reduces the reliance on manual operation, reduces the risk of errors during the installation process, and further improves the structural stability and overall bearing capacity of the bridge.

[0035] The present invention can also adopt other types of lifting equipment, such as tower cranes or crawler cranes. The adjusting device of the lifting equipment can adopt hydraulic, electric or pneumatic drive mode, and the most suitable adjustment technology can be selected according to the actual construction conditions. For example, in some complex or narrow construction environments, the adjusting device can be equipped with a more accurate automatic control system to monitor and adjust the position of the steel beam section during the lifting process in real time. In addition, the adjusting device can also be combined with 3D positioning technology or laser scanning technology to fine-tune the position, further improving the installation accuracy of the steel beam section. According to different bridge construction requirements, the form and function of the adjusting device can also be optimized and adjusted to meet the construction requirements in different environments.

[0036] The connecting device in S3 includes a steel cable, a connecting plate and a bolt, wherein the steel cable is used to position the steel beam segment during hoisting, and the connecting plate is connected to the adjacent steel beam segment by bolts to ensure that each steel beam segment is accurately docked. In the present invention, the connecting device includes a steel cable, a connecting plate and a bolt, forming an efficient and accurate connection system. The steel cable is used to accurately position the steel beam segment during hoisting, and its main function is to ensure that the steel beam segment will not be displaced or tilted during the hoisting process and maintain its stability. The tension control system of the steel cable can be adjusted in real time according to the weight and hoisting angle of the steel beam segment to ensure that the steel beam segment is always in a precise position during the hoisting process. When the steel beam segment is accurately hoisted to the construction position, the steel beam segment is fixedly connected to the adjacent steel beam segment by the connecting plate and the bolt. The design of the connecting plate ensures uniform force on the connection point, and the bolt ensures the firmness of the connection by locking. In this way, the steel beam segment can be accurately docked with the adjacent segment, and the strength and stability of the connection are guaranteed. The connection device provided by the present invention significantly improves the accuracy and stability of the installation of the steel beam segment through the coordinated use of steel cables, connecting plates and bolts. The positioning function of the steel cables ensures the precise positioning of the steel beam segment during the hoisting process, reducing the problem of inaccurate docking caused by hoisting errors. The combination of the connecting plates and bolts enhances the connection strength between the steel beam segments, effectively avoiding the risk of loosening or displacement of the connection points. Through this design, the installation of the steel beam segment can be completed quickly and accurately, which improves the construction efficiency and reduces the subsequent maintenance costs that may be caused by poor docking. In addition, the connection device is simple in structure and easy to operate, can adapt to various complex construction environments, and improves the adaptability and flexibility of the construction.

[0037] In addition to using steel cables, connecting plates and bolts, the connection device can also be changed according to actual needs. For example, the steel cable can be made of high-strength steel ropes of different specifications, the connecting plate can be customized according to the structural dimensions of the steel beam segment, and the bolt connection method can also choose other forms, such as welding, nuts and gaskets, etc., to further improve the stability of the connection. If construction is carried out under extreme climatic conditions, the material of the connection device can be selected from high-temperature and corrosion-resistant alloys or coated steel to extend its service life. According to the characteristics of the construction site, the connection device can also be equipped with an automatic adjustment device or a remote control operation system, so that the position of the steel beam segment can be monitored and adjusted in real time during the hoisting and installation process, further improving the connection accuracy and construction safety.

[0038] The method of fixing the steel beam section in S4 is welding or bolt connection, and each connection point is connected by high-strength steel or alloy steel to improve the tensile strength and stability of the structure. In the present invention, the method of fixing the steel beam section can be welding or bolt connection. These two methods can ensure that each steel beam section is firmly connected after installation to prevent the connection point from loosening or displacement due to external force. In the welding method, the steel is melted by high-temperature heating and then cooled and solidified to form a connection with extremely high strength. In the bolt connection method, the bolts of high-strength steel or alloy steel are tightened by precise torque to ensure that each connection point withstands a large tensile force without loosening. In order to further improve the tensile strength and stability of the structure, high-strength steel or alloy steel is specially selected as the connection material in the present invention. These materials have high tensile strength, corrosion resistance and good mechanical properties, can remain stable under harsh external environment and long-term load, and ensure the safety of the steel beam section and the overall bearing capacity of the bridge structure. The present invention adopts welding or bolting methods, combined with the selection of high-strength steel or alloy steel, to significantly improve the connection strength and stability of the steel beam segments. First, through welding or bolting methods, not only the fixation firmness of each steel beam segment is enhanced, but it can also effectively resist the influence of external forces such as wind and earthquake, and reduce displacement and loosening during long-term use. Secondly, high-strength steel or alloy steel is selected as the connection material, so that the connection point has strong tensile strength and durability, avoiding structural instability caused by material fatigue or corrosion. Ultimately, this connection method not only improves the safety of the bridge, but also extends the service life of the bridge, reduces the later maintenance costs, and improves the overall construction efficiency.

[0039] In other embodiments, in addition to welding and bolting, other efficient connection technologies can be used according to specific needs. For example, ultra-high strength bolts or anti-corrosion coated steel can be used for connection to meet the construction needs in special environments (such as humid and highly corrosive areas). In addition, for some bridges with higher requirements, the combination of welding and bolting is also a feasible solution. Welding can be used to increase the overall strength of the connection point, and then bolting can be used to reinforce the details. According to different climatic conditions, more adaptable alloy steels can also be selected to ensure that the connection points can still maintain stability and tensile strength in low or high temperature environments.

[0040] The detection of the connection part in S5 includes the use of laser rangefinders, displacement sensors or strain gauges and other equipment for precise measurement to ensure the docking accuracy and mechanical stability of the steel beam section after installation. In the present invention, high-precision equipment such as laser rangefinders, displacement sensors and strain gauges are used for the detection of the connection part. These equipment are used to accurately measure the docking accuracy of the steel beam section after installation and the mechanical properties of the connection. The laser rangefinder can efficiently measure the docking distance between the steel beam section and the previous section of the steel beam through the reflection principle of the laser beam to ensure that its position is accurate; the displacement sensor can monitor the tiny displacement of the connection part in real time to ensure the stability of the steel beam section after installation; the strain gauge is used to detect the stress and deformation of the connection part to determine whether the connection can withstand the design load and ensure its mechanical stability. These detection equipment can provide accurate real-time data, provide a basis for subsequent adjustment and optimization, and ensure the docking accuracy of the steel beam section and the stability of the overall structure. By adopting high-precision detection equipment such as laser rangefinders, displacement sensors and strain gauges, the present invention can achieve real-time and accurate monitoring of the connection part, significantly improving the installation accuracy. Laser rangefinders and displacement sensors ensure the precise docking of steel beam sections after installation, avoiding installation problems caused by position errors. Strain gauges can detect stress changes in the connection parts in a timely manner to ensure their mechanical stability, thereby avoiding uneven load or excessive deformation of the connection parts and ensuring the long-term safety of the bridge. These high-precision detection methods can detect potential problems in a timely manner during the construction process, make adjustments and optimizations, greatly improve installation accuracy and structural stability, and enhance the overall safety and durability of the bridge.

[0041] In other embodiments, in addition to laser rangefinders, displacement sensors and strain gauges, other advanced detection technologies, such as three-dimensional scanning technology or automated detection systems, can also be used to further improve detection accuracy and efficiency. The three-dimensional scanning technology uses a high-precision scanner to perform an all-round scan of the installation status of the steel beam segment and generate three-dimensional image data, thereby achieving comprehensive monitoring of the position and deformation of the steel beam segment. The automated detection system can use sensors and artificial intelligence algorithms to perform real-time analysis and judgment of the mechanical properties and geometric accuracy of all connection parts, thereby reducing manual intervention and improving construction quality. At the same time, under extreme environmental conditions (such as high temperature, high humidity, etc.), high temperature resistant or corrosion-resistant sensors and measuring equipment can also be used to ensure the stability and accuracy of the detection equipment.

[0042] The laser rangefinder and the displacement sensor are installed on the installation platform and the lifting equipment, respectively, to monitor the installation position of the steel beam section in real time. In the present invention, the laser rangefinder and the displacement sensor are installed on the installation platform and the lifting equipment, respectively. Through the coordinated work of the two devices, the installation position of the steel beam section can be monitored in real time and accurately. The laser rangefinder is installed on the installation platform, and can accurately measure the docking distance between the steel beam section and the previous section of the steel beam, as well as the horizontal and vertical positions of each connection point by reflecting the laser beam. The displacement sensor is installed on the lifting equipment, which can monitor the tiny displacement of the steel beam section during the lifting process in real time, and transmit the displacement data to the control system to help the operator make precise adjustments. The lifting equipment can automatically adjust the lifting angle and lifting force according to the data provided by the displacement sensor to ensure that the steel beam section is accurately docked to the predetermined position according to the design requirements. The combination of the laser rangefinder and the displacement sensor forms a highly automated monitoring system, which ensures the high-precision positioning and stability of the steel beam section during the installation process. The present invention effectively improves the monitoring accuracy and efficiency during the installation of steel beam segments by installing a laser rangefinder and a displacement sensor on the installation platform and the hoisting equipment respectively. The laser rangefinder provides high-precision positioning data to ensure the docking accuracy of the steel beam segments, while the displacement sensor monitors the tiny displacement of the hoisting equipment in real time to avoid deviations caused by hoisting errors during the installation process. This combination can adjust the position of the steel beam segments in real time during the installation process to avoid error accumulation, thereby ensuring the precise docking of each steel beam segment. In addition, the automated monitoring system reduces the need for manual operation, reduces human errors, and improves construction efficiency and safety. Through this technical means, the overall stability and bearing capacity of the bridge structure are ensured, the installation quality is greatly improved, and the subsequent maintenance costs are reduced.

[0043] In addition to the combination of laser rangefinders and displacement sensors, the present invention can also use other high-precision equipment, such as ultrasonic sensors, laser radars, etc. to perform real-time monitoring of the installation position. Ultrasonic sensors can be used to detect changes in the distance between steel beam sections, providing additional installation accuracy guarantees. Laser radar technology can scan the installation area over a large range, further improving the accuracy of the installation process. In addition, the installation platform and lifting equipment can also be equipped with an automated control system to combine the sensor's monitoring data with the movements of the lifting equipment, automatically adjust various parameters during the lifting process, and further improve the accuracy and efficiency of the installation of the steel beam sections. Depending on the construction environment, the combination of these detection equipment and control systems can be optimized and adjusted as needed to meet the challenges in different construction scenarios.

[0044] The hook part of the hoisting equipment in S2 is equipped with a plurality of adjustment devices for accurately controlling the hanging angle and horizontal position of the steel beam segment. In the present invention, the hook part of the hoisting equipment is equipped with a plurality of adjustment devices, and the function of these devices is to accurately control the hanging angle and horizontal position of the steel beam segment during the hoisting process. The adjustment device usually includes an adjustment mechanism driven by an electric or hydraulic drive, and the hanging angle of the steel beam segment can be changed by adjusting the hanging point position of the hook, thereby ensuring that the steel beam segment can be hoisted at the angle required by the design. In addition, the adjustment device can also control the left and right movement of the hook, accurately adjust the horizontal position of the steel beam segment, and ensure that it is always in the correct position during the hoisting process. Through these adjustment devices, the hoisting equipment can be adjusted in real time to compensate for the position deviation caused by the change of the hoisting angle, wind force or other external factors, and ensure that the steel beam segment can be accurately docked to the predetermined position. The high-precision control of the system can effectively avoid hoisting errors and ensure the installation quality of the steel beam segment. The present invention significantly improves the precision control during the hoisting process by equipping the hook part with a plurality of adjustment devices. The adjustment device can not only adjust the hanging angle of the steel beam segment in real time, but also fine-tune the horizontal position of the steel beam segment, avoiding installation deviations caused by external factors or errors during the hoisting process. This precise control improves the accuracy of the docking of the steel beam segment and the installation efficiency, reduces the additional adjustment work caused by position errors, and thus shortens the construction period. At the same time, the use of the adjustment device reduces the reliance on manual operation, improves the safety and reliability of the construction process, ensures the stability of the steel beam segment during the hoisting process, avoids tilting or asymmetry, and further ensures the structural safety of the bridge.

[0045] In addition to equipping the hook with multiple adjustment devices, other types of adjustment devices, such as pneumatic, hydraulic or electric adjustment devices, can also be used according to the lifting requirements to adapt to the requirements of different construction environments. In some special lifting scenarios, such as narrow or space-constrained construction areas, fine-tuning devices can be used to accurately control the lifting angle and horizontal position to ensure that the steel beam section is accurately lifted in a small space. In addition, the adjustment device can also be combined with an intelligent sensor system to provide real-time feedback on data during the lifting process, realizing a fully automated adjustment and monitoring system, further improving the efficiency and accuracy of the installation of the steel beam section.

[0046] When the steel beam section in S2 is transported to the construction bridge site, a transport vehicle or ship is used, and an anti-tilt device is used during the transportation process to ensure the stability of the steel beam section during transportation. In the present invention, the steel beam section is moved by a transport vehicle or ship during the transportation to the construction bridge site. In order to ensure the stability of the steel beam section during transportation, the transport tool is equipped with an anti-tilt device. These anti-tilt devices can be implemented in a variety of ways, such as using a fixing device to fix the steel beam section on the transport vehicle or ship to avoid the tilt or shaking of the beam due to external forces such as uneven road surface or waves. The anti-tilt device generally includes a support frame, a shock absorbing device, a damping system or a tilt monitoring system, which can detect the tilt angle of the steel beam section in real time, and adjust the support force or automatically correct the position when tilt occurs to ensure that the steel beam section always remains stable. During transportation, the coordination of the anti-tilt device and the transport vehicle or ship enables the steel beam section to be safely and smoothly transported to the construction site, avoiding structural damage or installation difficulties caused by tilt. The present invention significantly improves the transportation stability of the steel beam section by using an anti-tilt device during transportation. The anti-tilt device can effectively prevent the tilt of the beam caused by vibration, fluctuation or uneven road surface during transportation, thereby protecting the structural integrity of the steel beam section and preventing damage or deformation caused by tilt. The stability during transportation ensures that the steel beam section can smoothly reach the construction site, providing a good basic condition for subsequent installation. In addition, the use of anti-tilt equipment also reduces manual intervention and operation risks, improves transportation efficiency, and reduces possible losses during transportation, ensuring that the steel beam section can be safely and quickly put into bridge construction, improving the overall efficiency of construction.

[0047] In other embodiments, the anti-tilt equipment can be customized according to the transportation conditions and the different sizes or weights of the steel beam segments. For example, for steel beam segments with heavier weight or longer size, a more powerful hydraulic support system or a more complex automated monitoring and correction system can be used to ensure the stability of the steel beam segments during transportation. For scenarios where transportation is carried out by ship, an advanced dynamic stabilization system can be equipped, which can monitor the impact of waves on the ship in real time and automatically adjust the ship's posture to reduce the shaking and impact on the beam segments. In addition, it is also possible to combine GPS positioning systems and sensors to achieve intelligent monitoring and scheduling during transportation, record all dynamic data during transportation in real time, and further optimize transportation routes and anti-tilt measures.

[0048] The transportation of the steel beam segment in S1 includes two modes: segmented transportation and overall transportation. In the segmented transportation, each steel beam segment is temporarily fixed by a connecting device, and an anti-vibration device is used during transportation to prevent displacement or damage during transportation. The anti-vibration device includes a spring washer and a hydraulic support device, which is used to alleviate external vibration during transportation. In the present invention, the transportation of the steel beam segment adopts two modes: segmented transportation and overall transportation. In the segmented transportation, each steel beam segment is temporarily fixed by a connecting device to ensure the stability of the position of the steel beam segment during transportation. During transportation, the anti-vibration device is used to prevent displacement or damage caused by external vibration or impact. The anti-vibration device is mainly composed of a spring washer and a hydraulic support device. The spring washer can absorb vibration, reduce the impact of vibration on the steel beam segment during transportation, and avoid displacement or damage of the steel beam segment due to external vibration; while the hydraulic support device provides support force through the hydraulic system to alleviate the violent vibration caused by uneven road surface, vehicle shaking or wave fluctuations during transportation, thereby further ensuring the stability of the steel beam segment during transportation. Through these anti-vibration measures, it can be ensured that the steel beam segments will not be displaced or damaged during transportation, providing good conditions for subsequent installation work. The present invention adopts a combination of segmented transportation and overall transportation, and is equipped with anti-vibration devices, which can effectively improve the stability and safety of the steel beam segments during transportation. In segmented transportation, the connecting device ensures the temporary fixation of each steel beam segment to avoid displacement during transportation; the anti-vibration device further alleviates the impact of external vibration on the steel beam segment and prevents structural damage caused by vibration or impact. The use of spring washers and hydraulic support devices can effectively absorb and alleviate the vibration or impact force generated during transportation, reduce the displacement or deformation of the steel beam segment during transportation, and thus reduce the risk of damage that may be caused during transportation. Through these technical means, the transportation safety of the steel beam segments can be guaranteed, the installation difficulty or quality problems caused by transportation problems can be avoided, and the overall efficiency and safety of the construction can be improved.

[0049] In other embodiments, the anti-shock device can be customized according to the mode of transportation and the transportation environment. For example, suitable anti-shock devices can be selected for different means of transportation. When using ships for transportation, hydraulic buffer devices and anti-sway devices can be added to cope with the impact of waves or hull shaking. When using railway transportation, specially designed anti-shock track brackets and car shock absorption systems can be used to further reduce the impact of vibration on the steel beam segments. In addition, in order to adapt to more complex transportation environments, smart sensors and real-time monitoring systems can also be combined to monitor the vibration and the status of the steel beam segments during transportation in real time, and adjust the support strength and shock absorption effect of the anti-shock device in time to ensure the stability of the steel beam segments during the entire transportation process.

[0050] Working process: First, multiple steel beam sections are preset below the construction site. Each steel beam section is composed of multiple pre-assembled small longitudinal beams. The two ends of each small longitudinal beam are fixed to the adjacent steel beam sections through connecting plates. Subsequently, these steel beam sections are transported to the construction bridge site by transport vehicles or ships, and anti-vibration devices such as spring washers and hydraulic support devices are used during transportation to ensure that the steel beam sections are not displaced or damaged during transportation. After transportation, large-scale lifting equipment is used to lift the steel beam sections to the predetermined position. The hook part is equipped with multiple adjustment devices to accurately control the hanging angle and horizontal position of the steel beam sections to ensure accuracy during the lifting process. During the lifting process, each steel beam section is installed in place section by section through connecting devices such as steel cables, connecting plates and bolts to ensure that each steel beam section is accurately docked with the previous section and form a complete steel beam structure. Finally, after the installation is completed, the connection parts are accurately detected and adjusted using laser rangefinders, displacement sensors and other equipment to ensure the stability and connection strength of the steel beam. The entire process uses precise technical means and equipment coordination to ensure the installation accuracy and construction efficiency of the steel beam sections.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for installing a steel cross beam of a steel-concrete composite beam cable-stayed bridge, characterized in that: The method comprises: S1. Preset multiple steel beam sections under the bridge, each of which includes multiple pre-assembled small longitudinal beams; S2. Use large-scale lifting equipment to transport each steel beam segment from the ground or water surface to the construction site; S3. Install each steel beam section in place one by one through the connecting device in sequence, ensuring that the steel beam section is accurately connected with the previous section; S4. After each steel beam segment is installed, the steel beam segments are fixed to form a complete steel beam structure; S5. After installation, each connection point shall be inspected and adjusted to ensure the stability and connection strength of the steel beam.

2. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: The steel cross beam section in S1 includes pre-fixed small longitudinal beams, each of which is in multiple numbers, and both ends of each small longitudinal beam are fixedly connected to adjacent steel cross beam sections via connecting plates.

3. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: The S2 medium-to-large lifting equipment is a floating crane or a bridge crane, and during the lifting process, the lifting equipment has an adjustment device for adjusting the position of the steel beam section to ensure the accuracy of the installation of the steel beam section.

4. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: The connecting device in S3 includes a steel cable, a connecting plate and bolts, wherein the steel cable is used to position the steel beam segment during lifting, and the connecting plate is connected to the adjacent steel beam segment by bolts to ensure that each steel beam segment is accurately docked.

5. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: The method of fixing the steel beam section in S4 is welding or bolt connection, and each connection point is connected with high-strength steel or alloy steel to improve the tensile strength and stability of the structure.

6. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: The detection of the connection parts in S5 includes using a laser rangefinder, a displacement sensor or a strain gauge to perform precise measurement to ensure the docking accuracy and mechanical stability of the steel beam section after installation.

7. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 6, characterized in that: The laser rangefinder and displacement sensor are respectively installed on the installation platform and the hoisting equipment to monitor the installation position of the steel beam section in real time.

8. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: The hook part of the lifting equipment in S2 is equipped with multiple adjustment devices for accurately controlling the hanging angle and horizontal position of the steel beam section.

9. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: When the steel beam section in S2 is transported to the construction bridge site, a transport vehicle or ship is used, and an anti-tilt device is used during transportation to ensure the stability of the steel beam section during transportation.

10. The method for installing a steel cross beam of a steel-concrete composite cable-stayed bridge according to claim 1, characterized in that: The transportation of the steel beam segments in S1 includes two modes: segmented transportation and overall transportation. During segmented transportation, each steel beam segment is temporarily fixed by a connecting device, and an anti-vibration device is used during transportation to prevent displacement or damage during transportation. The anti-vibration device includes a spring gasket and a hydraulic support device, which is used to alleviate external vibration during transportation.

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