Loading and pre-pressing device of railway double-track continuous beam

Abstract

The invention relates to the technical field of bridge engineering, in particular to a loading and pre-pressing device of a railway double-line continuous beam. The loading pre-pressing device comprises an upper counter-force pre-pressing mechanism, a lower counter-force pre-pressing mechanism, an embedded part and a counter-force frame, wherein the upper counter-force pre-pressing mechanism, the lower counter-force pre-pressing mechanism, the embedded part and the counter-force frame are suitable for the railway double-line continuous beam cantilever pouring construction bridge fabrication machine. The upper counter-force prepressing mechanism comprises an upper counter-force beam, a loading oil cylinder, a distribution frame and the like; the lower counter-force prepressing mechanism comprises a lower counter-force beam, a loading oil cylinder and a distribution frame; the embedded part is divided into an upper embedded part and a lower embedded part; the counter-force frame is provided with a connecting frame, a descending frame, an ascending frame and the like which are matched with one another. The technical effects that effective loading prepressing can be provided for the railway double-line continuous beam, the performance of a construction bridge fabrication machine and the bridge quality are guaranteed, and the construction safety and stability are improved are achieved.

Description

Technical Field

[0001] This application relates to the technical field of bridge engineering, and in particular to a loading and preloading device for a double-track continuous railway beam. Background Technology

[0002] In the field of bridge engineering, improving construction standards, enhancing technological innovation capabilities, and promoting industrial upgrading have always been important development directions. In railway construction, double-track continuous beams are key structures, and the development of their construction techniques and equipment has a profound impact on the overall quality and efficiency of bridge engineering. With the continuous advancement of railway construction, the requirements for efficiency and safety in bridge construction are increasing, necessitating breakthroughs in matching construction techniques and equipment. The development of construction technologies related to railway double-track continuous beams is of great significance for promoting the upgrading of the bridge engineering construction industry.

[0003] In the development of railway double-track continuous beam construction technology, cantilever casting with formwork was a commonly used method in the early stages. This method involves pouring concrete at the cantilever end of the bridge using a formwork device. The formwork can move forward along the beam to gradually complete the continuous beam pouring. While this method could meet the construction needs of continuous beams to some extent, it had limitations in terms of efficiency and safety. With technological advancements, bridge-building machines for cantilever casting of railway double-track continuous beams began to emerge and gradually gained application. These machines include components such as the main beam, front crossbeam and front legs, middle crossbeam and rear legs, and a bottom platform. Through the coordinated work of these components, cantilever casting construction of bridges can be completed more efficiently.

[0004] During bridge construction, preloading is required to test the structure's load-bearing capacity and deformation characteristics. Traditional preloading methods often use heavy objects such as sandbags or water tanks, which suffer from uneven loading, low efficiency, and poor safety. These methods are difficult to apply comprehensively and accurately to bridge construction machines used for cantilever casting of railway double-track continuous beams, and cannot accurately simulate the stress conditions during actual construction, thus affecting the bridge's construction quality and safety. Summary of the Invention

[0005] In order to achieve preloading of the bridge-building machine for cantilever casting construction of railway double-track continuous beams, this application provides a loading and preloading device for railway double-track continuous beams.

[0006] The loading and preloading device for a double-track continuous railway beam provided in this application adopts the following technical solution: A loading and preloading device for a double-track continuous railway beam includes an upper reaction preloading mechanism, a lower reaction preloading mechanism, embedded parts, and a reaction frame. The upper reaction preloading mechanism includes an upper reaction beam, an inner mold loading cylinder, an outer mold loading cylinder, an inner mold distribution frame, and an outer mold distribution frame. The inner mold distribution frame is installed on the central inner mold longitudinal beam. Two outer mold distribution frames are installed on the outer mold longitudinal beams on either side. The inner mold loading cylinder is located at the top of the inner mold distribution frame. The outer mold loading cylinder... The hydraulic cylinder is located at the top of the outer mold distribution frame. The bottom of the upper reaction beam is connected to both the inner mold loading cylinder and the outer mold loading cylinder. The lower reaction preloading mechanism includes a lower reaction beam, a bottom platform loading cylinder, and a bottom platform distribution frame. The bottom platform distribution frame is installed on the bottom platform longitudinal beam. There are two bottom platform loading cylinders, which are respectively located at both ends of the top of the bottom platform distribution frame. The bottom of the lower reaction beam is connected to the bottom platform loading cylinder. The embedded part includes... The system includes an upper embedded part and a lower embedded part, both positioned vertically and embedded in the web of a double-track continuous railway beam. The reaction frame comprises a connecting frame, an upper reaction arm, and a lower reaction arm arranged at an angle to the horizontal. The upper reaction arm is located above the lower reaction arm, and the connection point between them is located at the lower end of the upper reaction arm and near the upper end of the lower reaction arm. The connecting frame is installed at the bottom of the lower reaction arm and below the connection position between the upper and lower reaction arms. The upper reaction arm is connected to the upper embedded part, and the lower reaction arm is connected to the lower embedded part. The connecting frame is connected to the top of the lower reaction beam. The number of reaction frames corresponds to the number of webs of the railway double-track continuous beam. A tie rod is provided between the upper and lower reaction beams. There are two tie rods, which are located between the inner mold distribution frame and the reaction frame, respectively.

[0007] By adopting the above technical solution, when the inner mold loading cylinder, outer mold loading cylinder, and bottom platform loading cylinder start working, the thrust generated by the inner mold loading cylinder is transmitted to the inner mold longitudinal beam through the inner mold distribution frame, and then to the main beam through the front crossbeam and the middle crossbeam; the thrust generated by the outer mold loading cylinder is transmitted to the outer mold longitudinal beam through the outer mold distribution frame, and then to the main beam through the front hanging leg and the rear hanging leg; the thrust generated by the bottom platform loading cylinder is transmitted to the bottom platform longitudinal beam through the bottom platform distribution frame, and the bottom platform longitudinal beam transmits the force to the bottom platform front crossbeam and the bottom platform rear crossbeam, and then to the front crossbeam and the middle crossbeam, and finally to the main beam, thus realizing the transmission of thrust from the aforementioned cylinders to the relevant components of the railway double-track continuous beam cantilever grouting construction bridge building machine.

[0008] Optionally, the inner mold distribution frame includes two inner transverse distribution beams and an inner longitudinal distribution beam. The bottom of the inner transverse distribution beam is connected to the top of the inner mold longitudinal beam, and the bottom of the inner longitudinal distribution beam is connected to the top of the inner transverse distribution beam. The top of the inner longitudinal distribution beam is connected to the upper reaction beam through the inner mold loading cylinder.

[0009] By adopting the above technical solution, the inner mold distribution frame adopts a structure of two inner transverse distribution beams and an inner longitudinal distribution beam, which can evenly distribute the force of the inner mold loading cylinder to the inner mold longitudinal beam, improve the uniformity and stability of the force on the inner mold longitudinal beam during loading and preloading, and thus improve the effect and accuracy of loading and preloading on the railway double-track continuous beam.

[0010] Optionally, the outer mold distribution frame includes two outer transverse distribution beams and an outer longitudinal distribution beam. The bottom of the outer transverse distribution beam is connected to the top of the outer mold longitudinal beam, and the bottom of the outer longitudinal distribution beam is connected to the top of the outer transverse distribution beam. The top of the outer longitudinal distribution beam is connected to the upper reaction beam through the outer mold loading cylinder.

[0011] By adopting the above technical solution, the outer mold distribution frame adopts a structure of two outer transverse distribution beams and an outer longitudinal distribution beam, which can evenly distribute the force of the outer mold loading cylinder to the outer mold longitudinal beam, improve the uniformity and stability of the force on the inner mold longitudinal beam during loading and preloading, and thus improve the effect and accuracy of loading and preloading on the railway double-track continuous beam.

[0012] Optionally, the bottom platform distribution frame includes two bottom longitudinal distribution beams and two bottom transverse distribution beams. The bottom of the bottom transverse distribution beam is connected to the top of the bottom platform longitudinal beam, and the bottom of the bottom longitudinal distribution beam is connected to the top of the bottom transverse distribution beam. The top of the bottom longitudinal distribution beam is connected to the lower reaction beam through the bottom platform loading cylinder.

[0013] By adopting the above technical solution, the bottom platform distribution frame adopts a structure of two bottom longitudinal distribution beams and two bottom transverse distribution beams, which can evenly distribute the force of the bottom platform loading cylinder to the bottom platform, improve the uniformity and stability of the force on the inner mold longitudinal beam during loading preloading, and thus improve the effect and accuracy of loading preloading on the railway double-track continuous beam.

[0014] Optionally, both the upper reaction arm and the lower reaction arm are constructed of I-beams, and the lower reaction arm is provided with stiffening ribs near the upper reaction arm.

[0015] By adopting the above technical solution, the upper and lower reaction arms are constructed as I-beams, which can improve the structural strength and stability of the reaction frame. Stiffening ribs are set at the position of the lower reaction arm near the upper reaction arm, which can further enhance the load-bearing capacity and structural stability of the lower reaction arm and ensure the reliable operation of the loading preload device during operation.

[0016] Optionally, the reaction frame further includes a connector, which is respectively disposed at one end of the lower reaction arm and the upper reaction arm near the web of the railway double-track continuous beam. The connector includes a base plate, one side of which is provided with two reinforcing plates for cooperating with the web of the I-beam, and the other side of which is provided with two first connecting plates spaced apart. The first connecting plates are provided with first pin holes, which are concentrically arranged.

[0017] By adopting the above technical solution, the connecting parts are set at one end of the lower reaction arm and the upper reaction arm near the web of the railway double-track continuous beam. The cooperation between the reinforcing plate and the I-beam web can enhance the connection stability. The first pin hole set concentrically on the first connecting plate facilitates the connection with the embedded parts, so that the reaction frame is reliably connected to the web of the railway double-track continuous beam, ensuring the stability and reliable operation of the overall structure of the loading preload device.

[0018] Optionally, the upper embedded part includes two upper horizontal plates, two upper vertical plates, and an upper partition plate. One end of the upper vertical plate is provided with a second pin hole for cooperating with the first pin hole. The second pin hole is concentrically arranged. The length of the upper horizontal plate is less than the length of the upper vertical plate. The top of the upper vertical plate is connected to the bottom of the upper horizontal plate. The two upper vertical plates are connected by the upper partition plate, and the upper partition plate is located between the upper horizontal plate and the second pin hole. The upper partition plate is arranged vertically to cooperate with the web surface of the railway double-track continuous beam.

[0019] By adopting the above technical solution, the structural design of the upper embedded part allows it to better connect with the reaction frame by matching the first pin hole of the connector. The upper diaphragm can fit against the web surface of the railway double-track continuous beam, which enhances the connection stability and integrity between the upper embedded part and the web, making the force transmission of the loading preload device more reasonable and reliable during operation.

[0020] Optionally, the lower embedded part includes two lower horizontal plates, two lower vertical plates, a lower partition plate, and two lower end plates. One end of the lower vertical plate is provided with a second pin hole for cooperating with the first pin hole. The second pin holes are concentrically arranged. The length of the lower horizontal plate is less than the length of the lower vertical plate. The top of the lower vertical plate is connected to the bottom of the lower horizontal plate. The two lower vertical plates are connected by the lower partition plate, and the lower partition plate is located between the lower horizontal plate and the second pin hole. The lower partition plate is arranged vertically to cooperate with the web surface of the railway double-track continuous beam. The lower end plate is located at the end of the lower vertical plate away from the second pin hole.

[0021] By adopting the above technical solutions, the connection between the lower embedded parts and the reaction frame connectors is more stable, which can better transmit the reaction force. Furthermore, the fit between the lower partition plate and the web surface can enhance the fit with the railway double-track continuous beam. The setting of the lower end plate can further enhance the structural stability and ensure the reliable operation of the loading preload device.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Employing an upper reaction force preloading mechanism and a lower reaction force preloading mechanism, the bridge-building machine for cantilever casting construction of railway double-track continuous beams can be precisely loaded and preloaded; 2. The installation of embedded parts and reaction frames can accurately simulate the stress conditions of a double-track continuous beam in actual construction. Attached Figure Description

[0023] Figure 1 This is a side view of the loading and preloading device for a double-track continuous railway beam provided in this application embodiment, in conjunction with a bridge-building machine for cantilever casting construction of a double-track continuous railway beam. The double-dotted line serves as the dividing line. The left side of the figure shows the structural state of the outer side of the double-track continuous railway beam, and the right side shows the structural state of the central position of the double-track continuous railway beam.

[0024] Figure 2 This is a front view structural diagram of the loading and preloading device for a double-track continuous railway beam provided in this application embodiment, in conjunction with a bridge-building machine for cantilever casting construction of a double-track continuous railway beam.

[0025] Figure 3 This is a schematic diagram of the main structure of the upper embedded part provided in the embodiment of this application.

[0026] Figure 4 This is a side view structural diagram of the upper embedded part provided in the embodiment of this application.

[0027] Figure 5 This is a side view structural diagram of the lower embedded part provided in the embodiment of this application.

[0028] Figure 6 This is a top view of the embedded part provided in the embodiment of this application.

[0029] Figure 7 This is a front view structural schematic diagram of the reaction frame provided in the embodiment of this application.

[0030] Figure 8 This is a side view of the reaction frame provided in the embodiment of this application.

[0031] Explanation of reference numerals in the attached diagram: 1-Upper reaction beam; 2-Inner mold loading cylinder; 3-Outer mold loading cylinder; 4-Inner transverse distribution beam; 5-Inner longitudinal distribution beam; 6-Outer transverse distribution beam; 7-Outer longitudinal distribution beam; 8-Lower reaction beam; 9-Bottom platform loading cylinder; 10-Bottom longitudinal distribution beam; 11-Bottom transverse distribution beam; 12-Upper embedded part; 1201-Upper horizontal plate; 1202-Upper vertical plate; 1203-Upper partition plate; 13-Lower... Embedded parts; 1301-Lower horizontal plate; 1302-Lower vertical plate; 1303-Lower partition plate; 1304-Lower end plate; 14-Reaction frame; 1401-Connecting frame; 1402-Base plate; 1403-Reinforcing plate; 1404-First connecting plate; 1405-Upper reaction arm; 1406-Lower reaction arm; 1407-Stiffening rib; 15-Tie rod; 16-Inner mold longitudinal beam; 17-Outer mold longitudinal beam; 18-Bottom platform longitudinal beam. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0033] This application discloses a loading and preloading device for a railway double-track continuous beam, applicable to a bridge-building machine for cantilever casting construction of a railway double-track continuous beam. The railway double-track continuous beam cantilever casting bridge-building machine includes a main beam, a front crossbeam and front hanging legs, a middle crossbeam and rear hanging legs, and a bottom platform. There are two main beams, which are arranged longitudinally. The front hanging legs are located at both ends of the front crossbeam, and the front crossbeam and the front hanging legs are connected by high-strength bolts. The front crossbeam is supported at the front end of the main beam and connected to the main beam by high-strength bolts. The front crossbeam is used to suspend the bottom platform and also to suspend the inner formwork longitudinal beam. 16. The front hanging leg is used to support the outer formwork longitudinal beam 17; the rear hanging leg is located at both ends of the middle crossbeam. The middle crossbeam and the rear hanging leg are connected by high-strength bolts. The middle crossbeam is supported in the middle of the main beam and is connected to the main beam by high-strength bolts. The middle crossbeam is used to suspend the bottom platform and also to suspend the inner formwork longitudinal beam 16. The rear hanging leg is used to support the outer formwork longitudinal beam 17. The bottom platform directly bears the weight of the railway double-track continuous beam. The bottom platform includes the bottom platform front crossbeam, the bottom platform rear crossbeam, and the bottom platform longitudinal beam 18, which is located on the top of both the bottom platform front crossbeam and the bottom platform rear crossbeam.

[0034] like Figure 1 and Figure 2 As shown, the loading and preloading device for the railway double-track continuous beam includes an upper reaction preloading mechanism, a lower reaction preloading mechanism, embedded parts, and a reaction frame 14. The upper reaction preloading mechanism, the lower reaction preloading mechanism, the embedded parts, and the reaction frame 14 work together to perform comprehensive and precise loading and preloading on the railway double-track continuous beam cantilever casting construction bridge building machine through methods such as hydraulic cylinder loading. This simulates the stress conditions during actual construction, thereby improving the construction quality and safety of the bridge.

[0035] like Figure 1 and Figure 2As shown, the upper reaction force preloading mechanism includes an upper reaction beam 1, an inner mold loading cylinder 2, an outer mold loading cylinder 3, an inner mold distribution frame, and an outer mold distribution frame. The inner mold distribution frame is mounted on the central inner mold longitudinal beam 16 and can be fixed to the inner mold longitudinal beam 16 using high-strength bolts. The inner mold distribution frame includes two inner transverse distribution beams 4 and an inner longitudinal distribution beam 5. The bottom of the inner transverse distribution beams 4 is connected to the top of the inner mold longitudinal beam 16 and fixed using high-strength bolts. The bottom of the inner longitudinal distribution beam 5 is also connected to the top of the inner transverse distribution beams 4, which can be welded. The top of the inner longitudinal distribution beam 5 is connected to the upper reaction beam 1 via the inner mold loading cylinder 2, which can be a hydraulic cylinder.

[0036] Two outer mold distribution frames are installed on the outer mold longitudinal beams 17 located on both sides, in a similar manner to the inner mold distribution frames. Each outer mold distribution frame includes two outer transverse distribution beams 6 and an outer longitudinal distribution beam 7. The bottom of the outer transverse distribution beams 6 is connected to the top of the outer mold longitudinal beams 17, and the bottom of the outer longitudinal distribution beams 7 is connected to the top of the outer transverse distribution beams 6. The top of the outer longitudinal distribution beams 7 is connected to the upper reaction beam 1 via an outer mold loading cylinder 3, which can also be a hydraulic cylinder. The combination logic of the inner and outer mold distribution frames is to distribute the loading force of the cylinders reasonably, ensuring that the upper reaction beam 1 is evenly stressed, thereby more accurately simulating the stress conditions of a railway double-track continuous beam cantilever casting bridge construction machine in actual construction.

[0037] As shown in Figure*, the lower reaction preloading mechanism includes a lower reaction beam 8, a bottom platform loading cylinder 9, and a bottom platform distribution frame. The bottom platform distribution frame is installed on the bottom platform longitudinal beam 18. There are two bottom platform loading cylinders 9, located at both ends of the top of the bottom platform distribution frame. The bottom platform loading cylinders 9 can be hydraulic cylinders, capable of transmitting pressure to the lower reaction beam 8. The bottom platform distribution frame includes two bottom longitudinal distribution beams 10 and two bottom transverse distribution beams 11. The bottom of the bottom transverse distribution beams 11 is simultaneously connected to the top of the bottom platform longitudinal beams 18, which can be achieved using high-strength bolts. The bottom of the bottom longitudinal distribution beams 10 is simultaneously connected to the top of the bottom transverse distribution beams 11, which can be achieved through welding. The top of the bottom longitudinal distribution beams 10 is connected to the lower reaction beam 8 via the bottom platform loading cylinders 9. The combined logic of the bottom platform distribution frame and the bottom platform loading cylinder 9 is to distribute the loading force of the bottom platform loading cylinder 9 evenly to the bottom platform longitudinal beam 18 through the bottom platform distribution frame, thereby simulating the stress situation of the bridge building machine in the actual construction of the cantilever grouting construction of the railway double-track continuous beam.

[0038] like Figure 1 and Figure 2 As shown, the embedded parts include an upper embedded part 12 and a lower embedded part 13. The upper embedded part 12 and the lower embedded part 13 are located in the same vertical direction and are embedded in the web of the railway double-track continuous beam.

[0039] like Figure 3 and Figure 4 As shown, the upper embedded part 12 includes two upper horizontal plates 1201, two upper vertical plates 1202, and an upper partition plate 1203. One end of the upper vertical plate 1202 is provided with a second pin hole for cooperating with the first pin hole. The length of the upper horizontal plate 1201 is less than the length of the upper vertical plate 1202. The top of the upper vertical plate 1202 is connected to the bottom of the upper horizontal plate 1201. The two upper vertical plates 1202 are connected by the upper partition plate 1203, and the upper partition plate 1203 is located between the upper horizontal plate 1201 and the second pin hole. The upper partition plate 1203 is arranged vertically to cooperate with the web surface of the railway double-track continuous beam.

[0040] like Figure 5 and Figure 6 As shown, the lower embedded part 13 includes two lower horizontal plates 1301, two lower vertical plates 1302, a lower partition plate 1303, and two lower end plates 1304. One end of each lower vertical plate 1302 has a second pin hole for engaging with the first pin hole. The length of the lower horizontal plate 1301 is less than the length of the lower vertical plate 1302. The tops of the lower vertical plates 1302 are connected to the bottoms of the lower horizontal plates 1301. The two lower vertical plates 1302 are connected by the lower partition plate 1303, which is located between the lower horizontal plate 1301 and the second pin hole. The lower partition plate 1303 is vertically positioned to engage with the web surface of the railway double-track continuous beam. The lower end plates 1304 are located at the end of the lower vertical plate 1302 furthest from the second pin hole. The function of the embedded part is to provide a stable connection point for the reaction frame 14, ensuring that the force during the loading and preloading process can be effectively transmitted to the railway double-track continuous beam.

[0041] In practical use, the upper embedded part 12 and the lower embedded part 13 are located in the same vertical direction and embedded in the web of the railway double-track continuous beam. Both are connected to the first pin hole through the second pin hole at one end of the vertical plate, providing a precise and stable connection node for the reaction frame 14 and ensuring a clear force transmission path during preloading. The design of the horizontal plate being shorter than the vertical plate and the top of the vertical plate being connected to the bottom of the horizontal plate allows the vertical plate to penetrate deeper into the beam to increase the embedment depth and enhance the anchoring force, while the horizontal plate can effectively undertake the connection and anchoring functions. The part located between the horizontal plate and the second pin hole... The vertical diaphragm and the web surface fit together to increase the contact area between the embedded part and the beam, disperse stress to avoid local stress concentration, and enhance the overall connection stability. The lower end plate 1304 added to the lower embedded part 13 is located at the end of the vertical plate away from the second pin hole, which can further increase the anchorage length and contact area of ​​the lower embedded part 13 in the beam, strengthen the stability of the lower connection point, and together with the structural design of the upper embedded part 12, form a coordinated upper and lower force system to ensure that the force is efficiently transferred from the reaction frame 14 to the railway double-track continuous beam, and meet the force requirements during the loading and preloading process.

[0042] like Figure 7 and Figure 8 As shown, the reaction frame 14 includes a connecting frame 1401, an upper reaction arm 1405 and a lower reaction arm 1406 arranged at an angle, and both the upper reaction arm 1405 and the lower reaction arm 1406 are arranged at an angle to the horizontal direction. The upper reaction arm 1405 is located above the lower reaction arm 1406. The connection position between the upper reaction arm 1405 and the lower reaction arm 1406 is located at the lower end of the upper reaction arm 1405 and at a position close to the upper end of the lower reaction arm 1406. The connecting frame 1401 is located at the bottom of the lower reaction arm 1406 and below the connection position between the upper reaction arm 1405 and the lower reaction arm 1406. The upper reaction arm 1405 is connected to the upper embedded part 12, and the lower reaction arm 1406 is connected to the lower embedded part 13. The connecting frame 1401 is connected to the top of the lower reaction beam 8. The number of reaction frames 14 corresponds to the number of webs of the railway double-track continuous beam. Both the upper reaction arm 1405 and the lower reaction arm 1406 are constructed of I-beams, which have the advantages of high strength and good stability. A stiffening rib 1407 is provided on the lower reaction arm 1406 near the upper reaction arm 1405 to enhance its strength. The reaction frame 14 also includes connecting members, which are respectively located at one end of the lower reaction arm 1406 and the upper reaction arm 1405 near the web of the railway double-track continuous beam. Each connecting member includes a base plate 1402. Two reinforcing plates 1403 for cooperating with the I-beam web are provided on one side of the base plate 1402, and two first connecting plates 1404 are spaced apart on the other side of the base plate 1402. The first connecting plates 1404 have first pin holes, which are concentrically arranged. The combination logic of the reaction frame 14 is that it is connected to the embedded parts through the upper reaction arm 1405 and the lower reaction arm 1406, and the connecting frame 1401 is connected to the lower reaction beam 8 to form a stable force-bearing structure, which transmits the preloaded force to the bridge-building machine for cantilever casting construction of railway double-track continuous beam.

[0043] Two tie rods 15 are provided between the upper reaction beam 1 and the lower reaction beam 8, located between the inner mold distribution frame and the reaction frame 14 respectively. The tie rods 15 can be steel tie rods, which can enhance the connection stability between the upper reaction beam 1 and the lower reaction beam 8 and ensure more accurate force transmission during the loading and preloading process.

[0044] The implementation principle of the loading and preloading device for a double-track continuous railway beam in this embodiment is as follows: This embodiment combines an upper reaction preloading mechanism, a lower reaction preloading mechanism, embedded parts, and a reaction frame 14. Using hydraulic cylinder loading, the force is accurately transmitted to various parts of the cantilever bridge-building machine for the double-track continuous railway beam, simulating the stress conditions during actual construction. This comprehensive and precise loading and preloading method can detect potential problems with the bridge-building machine under stress in advance, allowing for timely adjustments and improvements, thereby enhancing the construction quality and safety of the bridge. Compared to traditional loading and preloading methods, it has significant advantages and represents a major improvement over existing technologies.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A loading and preloading device for a railway double-track continuous beam, applicable to a railway double-track continuous beam cantilever casting construction bridge machine, the railway double-track continuous beam cantilever casting construction bridge machine comprising a main beam, a front crossbeam and front hanging legs, a middle crossbeam and rear hanging legs, and a bottom platform; the main beam consists of two sections, the main beam is arranged longitudinally; the front hanging legs are located at both ends of the front crossbeam, the front crossbeam and the front hanging legs are connected by high-strength bolts, the front crossbeam is supported at the front end of the main beam and connected to the main beam by high-strength bolts, the front crossbeam is used to suspend the bottom platform, and at the same time to suspend the inner formwork longitudinal beam (16), the front hanging legs are used for The outer formwork longitudinal beam (17) is supported; the rear hanging legs are located at both ends of the middle cross beam, and the middle cross beam and the rear hanging legs are connected by high-strength bolts. The middle cross beam is supported in the middle of the main beam and is connected to the main beam by high-strength bolts. The middle cross beam is used to suspend the bottom platform and also to suspend the inner formwork longitudinal beam (16). The rear hanging legs are used to support the outer formwork longitudinal beam (17). The bottom platform directly bears the weight of the railway double-track continuous beam. The bottom platform includes a bottom platform front cross beam, a bottom platform rear cross beam, and a bottom platform longitudinal beam (18) located at the top of both the bottom platform front cross beam and the bottom platform rear cross beam. The feature is that... include: Upper reaction preloading mechanism, lower reaction preloading mechanism, embedded parts and reaction frame (14); The upper reaction force preloading mechanism includes an upper reaction beam (1), an inner mold loading cylinder (2), an outer mold loading cylinder (3), an inner mold distribution frame, and an outer mold distribution frame. The inner mold distribution frame is installed on the inner mold longitudinal beam (16) located in the center. There are two outer mold distribution frames, which are respectively installed on the outer mold longitudinal beams (17) located on both sides. The inner mold loading cylinder (2) is located at the top of the inner mold distribution frame, and the outer mold loading cylinder (3) is located at the top of the outer mold distribution frame. The bottom of the upper reaction beam (1) is connected to both the inner mold loading cylinder (2) and the outer mold loading cylinder (3). The lower reaction force preloading mechanism includes a lower reaction beam (8), a bottom platform loading cylinder (9), and a bottom platform distribution frame. The bottom platform distribution frame is installed on the bottom platform longitudinal beam (18). There are two bottom platform loading cylinders (9), which are respectively located at both ends of the top of the bottom platform distribution frame. The bottom of the lower reaction beam (8) is connected to the bottom platform loading cylinder (9). The embedded parts include an upper embedded part (12) and a lower embedded part (13), which are located in the same vertical direction and are embedded in the web of the railway double-track continuous beam. The reaction frame (14) includes a connecting frame (1401), an upper reaction arm (1405) and a lower reaction arm (1406) arranged at an angle, and both the upper reaction arm (1405) and the lower reaction arm (1406) are arranged at an angle to the horizontal direction. The upper reaction arm (1405) is located above the lower reaction arm (1406), and the connection position between the upper reaction arm (1405) and the lower reaction arm (1406) is located at the lower end of the upper reaction arm (1405) and close to the lower reaction arm (1406). The connecting frame (1401) is located at the bottom of the lower reaction arm (1406) and below the connection point between the upper reaction arm (1405) and the lower reaction arm (1406). The upper reaction arm (1405) is connected to the upper embedded part (12), and the lower reaction arm (1406) is connected to the lower embedded part (13). The connecting frame (1401) is connected to the top of the lower reaction beam (8). The number of reaction frames (14) corresponds to the number of webs in the railway double-track continuous beam. A tie rod (15) is provided between the upper reaction beam (1) and the lower reaction beam (8). There are two tie rods (15), which are located between the inner mold distribution frame and the reaction frame (14).

2. The loading and preloading device for a double-track continuous railway beam according to claim 1, characterized in that, The inner mold distribution frame includes two inner transverse distribution beams (4) and an inner longitudinal distribution beam (5). The bottom of the inner transverse distribution beam (4) is connected to the top of the inner mold longitudinal beam (16), and the bottom of the inner longitudinal distribution beam (5) is connected to the top of the inner transverse distribution beam (4). The top of the inner longitudinal distribution beam (5) is connected to the upper reaction beam (1) through the inner mold loading cylinder (2).

3. The loading and preloading device for a double-track continuous railway beam according to claim 1, characterized in that, The outer mold distribution frame includes two outer transverse distribution beams (6) and an outer longitudinal distribution beam (7). The bottom of the outer transverse distribution beam (6) is connected to the top of the outer mold longitudinal beam (17), and the bottom of the outer longitudinal distribution beam (7) is connected to the top of the outer transverse distribution beam (6). The top of the outer longitudinal distribution beam (7) is connected to the upper reaction beam (1) through the outer mold loading cylinder (3).

4. The loading and preloading device for a double-track continuous railway beam according to claim 1, characterized in that, The bottom platform distribution frame includes two bottom longitudinal distribution beams (10) and two bottom transverse distribution beams (11). The bottom of the bottom transverse distribution beam (11) is connected to the top of the bottom platform longitudinal beam (18). The bottom of the bottom longitudinal distribution beam (10) is connected to the top of the bottom transverse distribution beam (11). The top of the bottom longitudinal distribution beam (10) is connected to the lower reaction beam (8) through the bottom platform loading cylinder (9).

5. The loading and preloading device for a double-track continuous railway beam according to claim 1, characterized in that, Both the upper reaction arm (1405) and the lower reaction arm (1406) are constructed of I-beams, and the lower reaction arm (1406) is provided with stiffening ribs (1407) near the upper reaction arm (1405).

6. The loading and preloading device for a double-track continuous railway beam according to claim 5, characterized in that, The reaction frame (14) also includes a connector, which is respectively located at one end of the lower reaction arm (1406) and the upper reaction arm (1405) near the web of the railway double-track continuous beam. The connector includes a base plate (1402). One side of the base plate (1402) is provided with two reinforcing plates (1403) for cooperating with the web of the I-beam. The other side of the base plate (1402) is provided with two first connecting plates (1404) spaced apart. The first connecting plates (1404) are provided with first pin holes, which are concentrically arranged.

7. The loading and preloading device for a double-track continuous railway beam according to claim 6, characterized in that, The upper embedded part (12) includes two upper horizontal plates (1201), two upper vertical plates (1202), and an upper partition plate (1203). One end of the upper vertical plate (1202) is provided with a second pin hole for cooperating with the first pin hole. The second pin hole is concentrically arranged. The length of the upper horizontal plate (1201) is less than the length of the upper vertical plate (1202). The top of the upper vertical plate (1202) is connected to the bottom of the upper horizontal plate (1201). The two upper vertical plates (1202) are connected by the upper partition plate (1203). The upper partition plate (1203) is located between the upper horizontal plate (1201) and the second pin hole. The upper partition plate (1203) is arranged vertically to cooperate with the web surface of the railway double-track continuous beam.

8. The loading and preloading device for a double-track continuous railway beam according to claim 6, characterized in that, The lower embedded part (13) includes two lower horizontal plates (1301), two lower vertical plates (1302), a lower partition plate (1303), and two lower end plates (1304). One end of the lower vertical plate (1302) is provided with a second pin hole for cooperating with the first pin hole. The second pin hole is concentrically arranged. The length of the lower horizontal plate (1301) is less than the length of the lower vertical plate (1302). The top of the lower vertical plate (1302) is connected to the bottom of the lower horizontal plate (1301). The two lower vertical plates (1302) are connected by the lower partition plate (1303). The lower partition plate (1303) is located between the lower horizontal plate (1301) and the second pin hole. The lower partition plate (1303) is arranged vertically to cooperate with the web surface of the railway double-track continuous beam. The lower end plate (1304) is located at the end of the lower vertical plate (1302) away from the second pin hole.

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