Modular girder of bridge girder erection machine and construction method thereof

Abstract

The invention provides a bridge girder erection machine modular girder which comprises a foundation frame and a lengthened module, the lengthened module comprises a first standard knot and a second standard knot, the first standard knot and the second standard knot are detachably arranged on the two sides of the foundation frame respectively, and butt joint formworks are arranged at the end of the foundation frame and the end of the lengthened module respectively. The two opposite butt joint formworks are hinged through at least two jacks, and the angle between the foundation frame and the lengthening module is controlled by adjusting the telescopic positions of the two jacks. The bridge girder erection machine is ingenious in design, reasonable in structure and convenient to assemble, disassemble and adjust, the application scene of the bridge girder erection machine is greatly widened, efficient construction is guaranteed, and meanwhile the construction cost is lower.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction equipment, in particular to a modular main beam of a bridge erecting machine and a construction method thereof. BACKGROUND

[0002] In current highway bridge erection, the main beam of the bridge erecting machine is mostly designed in an integral structure, which has the following defects: firstly, the span of the main beam is related to the carrying capacity, when the span or weight of the bridge to be erected changes, the whole main beam needs to be replaced, resulting in high equipment investment cost, long replacement period and serious impact on construction efficiency; secondly, the connection interface between the main beam and the leg is mostly specially designed, one interface can only adapt to one type of leg, and the leg cannot be flexibly replaced (such as support leg, guide leg, auxiliary leg, etc.) according to the demand of bridge erection, and the versatility is poor; thirdly, the integral main beam is rigid and cannot be adjusted, when a small curvature bridge is erected, the main beam is difficult to fit the curve track of the bridge, and problems such as beam body deviation and uneven stress are prone to occur; fourthly, during the installation and assembly of the main beam and the bridge erection process, the installation precision and structural safety mainly rely on manual monitoring, and there is a lack of real-time and accurate monitoring means, which is prone to cause installation deviation due to human error, and even causes safety hazards such as structural overload.

[0003] Chinese patent document CN 112982172 A records a bridge erecting machine and an erecting method using the bridge erecting machine, but the bridge erecting machine cannot be assembled according to the needs on site, and the use has defects; Chinese patent document CN 119414892 A records an intelligent control system and an intelligent control method of a bridge erecting machine, the control is relatively troublesome and inconvenient to operate, and needs to be improved. SUMMARY

[0004] The present application provides a bridge erecting machine modular main beam and a construction method thereof, which solves the technical problem that the bridge erecting machine has low adaptability, is not easy to adjust the structure according to the needs on site, and cannot better adapt to the curve assumption.

[0005] To solve the above technical problems, the technical solution adopted by the present application is: a bridge erecting machine modular main beam, comprising a base frame and an extension module, the extension module comprising a first standard section and a second standard section, the first standard section and the second standard section being respectively detachably arranged on both sides of the base frame, the ends of the base frame and the extension module being respectively provided with a butt joint template, the two opposite butt joint templates being hinged by at least two jacks, and the angle between the base frame and the extension module being controlled by adjusting the extension positions of the two jacks.

[0006] In the preferred scheme, the two first standard sections and / or the two second standard sections adjacent to each other on the same side are connected by a flat link at the end away from the base frame, and the second standard section is further provided with a reinforcing assembly.

[0007] In the preferred solution, the first adjusting plate and the second adjusting plate are respectively arranged on the two opposite docking templates, and the first adjusting plate and the second adjusting plate are hingedly connected through a pin.

[0008] In the preferred solution, the two sides of the jack are respectively hingedly provided with hinged seats, and the two hinged seats are respectively arranged on the two opposite docking templates. In the preferred solution, two scanning assemblies are respectively and symmetrically arranged at the bottom of the two opposite docking templates, the two scanning assemblies are connected through a pull rope, the scanning assembly comprises a motor and a lever arranged on the motor, and the lever is attached to one side of the pull rope.

[0009] In the preferred solution, the scanning assembly comprises an L-shaped plate and a top plate, the top plate is fixed on the bottom of the docking template through a screw, the lever is sleeved on the output shaft at the end of the motor through an adapter sleeve, the pull rope comprises a telescopic cylinder, a coil spring is arranged in the telescopic cylinder, the end of the pull rope is connected with the coil spring, and the telescopic cylinder is connected with the top plate through a fastening nail.

[0010] In the preferred solution, a mounting hole is formed through the top plate, the fastening nail is arranged on the telescopic cylinder and the coil spring, the fastening nail is threadedly connected with the mounting hole, a limiting disc is arranged at the lower part of the fastening nail, the limiting disc is supported on the bottom of the telescopic cylinder, an adjusting sleeve is further arranged on the upper side of the telescopic cylinder, the adjusting sleeve is threadedly connected with the fastening nail, and a push plate is arranged on the outer side of the adjusting sleeve.

[0011] In the preferred solution, a construction method of a modular main beam of a bridge erecting machine comprises the following steps: S1. Selecting the structure and length of the main beam through path calculation and weight adaptation; S2. Assembling the whole through a base frame and a lengthening module; S3. Correspondingly installing a support leg under the main beam; S4. Checking the state of the scanning assembly at different positions and calibrating; S5. Starting the equipment to perform the bridge erecting operation; S6. Adjusting the state of the main beam according to the bridge direction and locking; S7. When the curvature displacement needs to be changed, changing the angle between the two docking templates at different positions; S8. Recording and confirming the angle data through the two opposite scanning assemblies and the pull rope; S9. After confirming that there is no error, performing the subsequent bridge erecting operation; S10. Repeating S6-S9 until the whole construction of the bridge is completed.

[0012] In the preferred scheme, in S1, the span is calculated: if the bridge span is Li, the number of spans covered by the bridge girder is different according to different processes, the combined length of the basic module and the lengthening module is selected to be greater than or equal to ∑Li+1 / lengthening module Li (a reserved construction allowance); Weight adaptation: if the bridge girder weight is less than or equal to the upper limit of the basic module bearing, only the basic module and the lengthening module are selected; if the weight exceeds the upper limit, the reinforcing module is inserted between the adjacent modules, and the number of reinforcing modules is calculated by increasing the weight; In S2, the selected basic frame and lengthening module are hoisted to the assembly platform, and the positioning pins arranged at the respective ends are used to realize preliminary positioning; High-strength bolts are used for connection and fastening, and laser displacement sensors are used to monitor the gap between the module end faces to ensure that the gap meets the design requirements; In S3, according to the erection requirements, the corresponding type of leg (such as support leg for main girder support and guide leg for girder guide) is selected, the leg is fixed on the basic frame and / or lengthening module through bolts, the electrical module is connected, and the signal intercommunication between the leg and the main girder is realized; In S4, zero-point calibration is performed on all sensors to ensure the accuracy of the monitoring data; The data processing unit is started, the sensor signals are confirmed to be normal through the construction monitoring terminal, and the alarm thresholds of stress, displacement, vibration and other parameters are set; In S6, the assembled modular main girder is installed on the bridge girder erector, and the bridge girder erector is started to hoist and erect the girder; During the erection of the bridge, the sensor data of the construction monitoring terminal is monitored in real time, and if the stress exceeds the threshold, the vibration is abnormal, or the leg pressure is abnormal, etc., the work is immediately stopped, and the fault is checked; After the bridge is erected, the legs and the hinge modules are removed, the main girder modules are disassembled, cleaned and stored for subsequent reuse.

[0013] In the preferred scheme, the following steps are included: in S6, the included angle data between the relative bridge direction of the scanning assembly and the pull rope at each position is determined, wherein the included angle between the relative bridge direction of the pull rope between the two scanning assemblies on the upper side and the bridge direction is α1, the included angle between the relative bridge direction of the pull rope between the two scanning assemblies on the lower side and the bridge direction is α2, and the angle between the two abutting templates is α3; when α3=α1+α2 is satisfied, the locking can be performed, and the subsequent construction steps are completed. The beneficial effects of the present application are: 1. Through modular design, the main girder can be flexibly assembled according to the bridge span and weight, and the highway bridge erection of 10-50m span and 100-800t weight can be adapted without replacing the whole main girder, the equipment reuse rate is increased by more than 60%, and the equipment investment cost is reduced; 2. High flexibility: the multifunctional interface can quickly replace different types of legs to adapt to different erection scenes, and the leg replacement time is shortened to within 30 minutes (the traditional structure needs 2-3 hours); 3. Configure the rotating hinge module to meet the erection requirements of bridges with different curvatures, and the rotating hinge module can adapt to bridges with various radii of curvature, solving the problem that the traditional main girder cannot fit the curve; 4. Precision and safety are improved: sensors monitor installation precision and structural safety in real time, avoiding manual monitoring errors and greatly reducing safety risks. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below in conjunction with the drawings and examples: Figure 1 is a schematic view of the overall structure of the present application in elevation; Figure 2 is a schematic view of the overall structure of the present application in plan; Figure 3 is a basic framework diagram of the present application; Figure 4 is a structure diagram of the first standard section of the present application; Figure 5 is a structure diagram of the second standard section of the present application; Figure 6 is a schematic view of the docking module connection of the present application in elevation; Figure 7 is a schematic view of the docking module connection of the present application in plan; Figure 8 is a state diagram of the basic framework and the lengthening module of the present application maintaining the same axis; Figure 9 is a state diagram of the basic framework and the lengthening module of the present application maintaining the displacement; Figure 10 is a corner displacement schematic view of Figure 9 ; Figure 11 is a structure schematic view of Figure 8 ; Figure 1 ; Figure 12 is a structure schematic view of Figure 8 ; Figure 2 ; Figure 13 is a structure schematic view of Figure 8 ; Figure 3 ; Figure 14 is a structure schematic view of Figure 9 ; Figure 1; Figure 15 is Figure 9 a structural diagram of Figure 2 . Figure 16 is a structural diagram of the scanning assembly of the present application; Figure 17 is Figure 16 a front view diagram; Figure 18 is Figure 16 a right view diagram; Figure 19 is an internal diagram of the scanning assembly of the present application Figure 1 . Figure 20 is an internal diagram of the scanning assembly of the present application Figure 2 .

[0015] In the figure: base frame 1; lengthening module 2; first standard section 201; second standard section 202; flat joint 203; reinforcing assembly 204; butt joint template 3; first adjusting plate 4; second adjusting plate 5; bolt 6; jack 7; hinged seat 8; scanning assembly 9; L-shaped plate 901; top plate 902; screw 903; motor 904; output shaft 905; adapter sleeve 906; lever 907; mounting hole 908; pull rope 10; telescopic cylinder 1001; fastening nail 1002; limiting disc 1003; adjusting sleeve 1004; push plate 1005. DETAILED DESCRIPTION

[0016] As Figures 1-7 in the specification, a modular girder of a bridge erecting machine comprises a base frame 1 and a lengthening module 2, the lengthening module 2 comprises a first standard section 201 and a second standard section 202, the first standard section 201 and the second standard section 202 are respectively detachably arranged on two sides of the base frame 1, the base frame 1 and the lengthening module 2 are respectively provided with butt joint templates 3 at the ends, and the two butt joint templates 3 opposite to each other are hinged through at least two jacks 7, and the angle between the base frame 1 and the lengthening module 2 is controlled by adjusting the telescopic positions of the two jacks 7.

[0017] Currently, traditional bridge erecting machines are mostly one machine per bridge, with each machine designed for a single purpose. This results in high manufacturing costs and low reuse rates. Furthermore, due to differences in the curvature of different bridge lengths, the versatility of these machines is poor. Particularly when used on bridges with small curvatures, the main beam struggles to conform to the bridge's curve, leading to beam misalignment and uneven stress. This solution offers flexible configuration options based on specific needs. The foundation frame 1 serves as the core load-bearing support, ensuring safe and stable operation. The extension module 2 can be installed and removed as required. Through the coordination of the first standard section 201 and the second standard section 202, the span requirements of the bridge are met, thereby increasing the overall applicability, ensuring convenient construction, and reducing overall construction costs.

[0018] In a preferred embodiment, two adjacent first standard sections 201 and / or second standard sections 202 on the same side are connected by a horizontal connector 203 at the end away from the base frame 1, and a reinforcing component 204 is also provided on the second standard section 202.

[0019] As needed, the first standard section 201 and / or the second standard section 202 are installed on both sides of the base frame 1. To accommodate different load-bearing capacities, double-row extension modules 2 can be used to increase the overall load-bearing capacity. When using a double-row design, the ends are assembled using horizontal bracing 203 to ensure structural stability. Reinforcing components 204 are used at different locations according to design specifications to enhance the overall structural strength. If necessary, the double-row base frame 1 and the extension modules 2 are further secured at the bottom and top using horizontal bracing 203 to ensure load-bearing rigidity and improve torsional bending strength.

[0020] In the preferred embodiment, a first adjusting plate 4 and a second adjusting plate 5 are respectively provided on the two opposite mating templates 3. The first adjusting plate 4 and the second adjusting plate 5 are hinged by a pin 6, which is inserted into the first adjusting plate 4 and the second adjusting plate 5.

[0021] By setting the first adjustment plate 4 and the second adjustment plate 5, the corner displacement function between two adjacent mating templates 3 is realized, which meets the erection needs to cope with curvature changes. When in use, the transition is adjusted to match the curvature value, thereby ensuring the efficiency of erection. After hoisting and erection, there are fewer adjustment procedures, and the construction is safe and efficient.

[0022] In the preferred embodiment, hinge seats 8 are respectively hinged on both sides of the jack 7, and the two hinge seats 8 are respectively set on the two opposite mating templates 3. Multiple hinge seats 8 are provided and are evenly distributed at the ends of the mating template 3 to support the force from multiple angles, thereby improving the overall displacement capacity. At the same time, the overall structural strength is guaranteed after displacement. The hinge seats 8 are fixed by welding to ensure stable load-bearing capacity.

[0023] like Figures 8-20 In the preferred embodiment, two scanning components 9 are symmetrically arranged at the bottom of the two opposite docking templates 3. The two opposite scanning components 9 are connected by a pull rope 10. The scanning component 9 includes a motor 904 and a lever 907 arranged on the motor 904. The lever 907 is attached to one side of the pull rope 10.

[0024] Traditionally, by varying the extension length of jacks 7 at different positions, and with the limiting action of the first adjusting plate 4 and the second adjusting plate 5, displacement between two adjacent docking templates 3 is achieved. However, due to inconsistent responses and time delays among jacks 7 at different positions, as well as slight differences in speed, the corresponding jacks 7 can be calibrated by using a scanning component 9 and a pull rope 10. Jacks 7 at different heights need to be adjusted to meet the error range before subsequent construction can proceed, thus improving overall safety and reducing the risk of stress concentration caused by uneven coordination of multiple jacks 7 within the bridge erecting machine.

[0025] In a preferred embodiment, the scanning component 9 includes an L-shaped plate 901 and a top plate 902. The top plate 902 is fixed to the bottom of the docking template 3 by screws 903. The lever 907 is sleeved on the output shaft 905 at the end of the motor 904 via an adapter sleeve 906. The pull rope 10 includes a telescopic cylinder 1001. A coil spring is provided inside the telescopic cylinder 1001. The end of the pull rope 10 is connected to the coil spring. The telescopic cylinder 1001 is connected to the top plate 902 by fastening pins 1002.

[0026] This design is simple to operate, has a wide range of applications, and is not afraid of external dust interference. Since the pull rope 10 is positioned by the telescopic cylinder 1001, and the length of the pull rope 10 can be freely adjusted in the telescopic cylinder 1001 by the coil spring, in the initial state, the pull rope between the two opposite scanning components 9 is kept in a state of tension. When a corner displacement is required, the length of one pull rope 10 increases and the length of the other pull rope 10 decreases. At this time, the two pull ropes 10 still maintain a straight and force-bearing state, ensuring the accuracy of the measurement. Before use, it is necessary to check the direction of the corner displacement, and then adjust the lever 907 to the side away from the corner displacement direction, and attach it to the pull rope 10 at this time. The motor 904 is a servo motor, and the encoder can accurately guide the displacement angle. At the same time, a pressure sensor is installed on the scanning component 9. The pull rope 10 completes the signal acquisition under the attachment and movement of the lever 907. This state is the end point after the corner displacement. During initial use, the two adjacent mating templates 3 are kept coaxial and straight. At this time, the initial position is calibrated by lever 907 and pull rope 10. That is, the position in this state is the data zero point. After the pull rope 10 in different positions changes position, theoretically, it should maintain the same angle value. However, due to certain systematic errors in the manufacturing precision and execution of each component, an error allowable range is set. Only when the angle values ​​of two different positions are within the error allowable range can the state be locked, and then the subsequent construction process can be completed.

[0027] In the preferred embodiment, a mounting hole 908 is provided through the top plate 902, and a fastening pin 1002 is provided through the telescopic cylinder 1001 and the coil spring. The fastening pin 1002 and the mounting hole 908 are threadedly connected. A limiting plate 1003 is provided at the lower part of the fastening pin 1002. The limiting plate 1003 is supported at the bottom of the telescopic cylinder 1001. An adjusting sleeve 1004 is also provided on the upper side of the telescopic cylinder 1001. The adjusting sleeve 1004 and the fastening pin 1002 are threadedly connected. A push plate 1005 is provided on the outer side of the adjusting sleeve 1004.

[0028] During use, a certain gap is maintained between the bottom of the adjusting sleeve 1004 and the top of the telescopic cylinder 1001. This allows the telescopic cylinder 1001 to rotate on the fastening pin 1002 during cornering, as the pull rope 10 pulls the telescopic cylinder 1001. The fastening pin 1002 and the mounting hole 908 are coaxial with the output shaft 905 of the motor 904. This allows for accurate cornering data to be obtained. Preferably, the pull rope 10 is electroplated with a metal layer, and the lever 907 is made of metal. To improve overall accuracy and sensitivity, a buzzer is provided. When the lever 907 is in contact with the pull rope 10, the power supply connects the two, and the buzzer sounds. At the same time, the current signal is acquired by the controller, which records the current cornering value corresponding to the encoder. It is simple to use and effective. Since the pull rope 10 is a flexible component, even if the lever 907 fails or becomes entangled, there is no risk. It can be replaced in time. The operation is simple and effective.

[0029] In a preferred embodiment, a construction method for a modular main beam of a bridge erecting machine includes the following steps: S1. The selection of the main beam structure and length is completed through path calculation and weight adaptation; S2. The overall assembly is completed using the base frame 1 and the extension module 2; S3. Install corresponding support legs on the lower part of the main beam; S4. Check the status of scanning components 9 at different positions and perform calibration; S5. Start the equipment to carry out bridge erection work; S6. Adjust and lock the main beam according to the bridge orientation; S7. When curvature displacement is required, change the angle between the two mating templates 3 at different positions; S8. The corner data is recorded and confirmed by the two opposing scanning components 9 and the pull rope 10. S9. After confirming that everything is correct, proceed with the subsequent bridge erection work; S10, repeat S6~S9 until all bridge construction is completed.

[0030] Sensors are also installed on the main beam. The sensor package includes: This includes installing precision monitoring sensors: laser displacement sensors are installed at the connection points of each module to monitor the end face gap during module splicing (accuracy ±0.1mm); a dual-axis tilt sensor is installed on the top of the main beam to monitor the levelness of the main beam after splicing (accuracy ±0.01°). Safety monitoring sensors: Strain gauge stress sensors are attached to the middle of the main beam and the reinforcing module to monitor the stress on the main beam in real time (range 0-500MPa); torque and angle sensors are installed at the hinge shaft of the hinge module to monitor the torque value and angle in the locked state; vibration sensors are installed at both ends of the main beam to monitor the vibration frequency and amplitude during the bridge erection process to avoid the risk of resonance. Data processing unit: A waterproof control box is installed in the middle of the main beam, which has a built-in data acquisition module and a wireless transmission module. After the sensor signals are processed by the data acquisition module, they are transmitted wirelessly to the construction monitoring terminal. When the monitored data exceeds the preset threshold, the terminal will issue an audible and visual alarm.

[0031] Therefore, during assembly, high-strength bolts are used to connect and fasten the pins of each module, and a laser displacement sensor is used to monitor the gap at the end face of the module to ensure that the gap is ≤0.3mm. For bridges with small curvature, install the hinge module at the preset position (determined by calculation based on the bridge curve radius), adjust the hinge shaft rotation angle to make the main beam axis consistent with the bridge curve trajectory, and after adjustment, activate the locking mechanism to lock the hinge module. The levelness of the main beam is monitored by a dual-axis tilt sensor. If there is a deviation, the support height of the assembly platform is adjusted to ensure that the levelness error of the main beam is ≤0.05°. Zero-point calibration is performed on all sensors to ensure the accuracy of monitoring data; Start the data processing unit, confirm that the signals of each sensor are normal through the construction monitoring terminal, and set the alarm thresholds for parameters such as stress, displacement, and vibration.

[0032] For example, consider a highway bridge with a 30m span and a weight of 300t with a small curvature (curve radius 300m), using three outriggers: Module selection: The combined length of the basic module and the extended module is approximately ∑Li+1 / 2Li=75m. The reinforcement module is selected through finite element analysis. Assembly process: First, assemble the basic module, insert the reinforcing module in the middle position, and fix it with positioning pins and high-strength bolts. The laser displacement sensor monitors the end face gap and finds it to be 0.2mm (meets the requirements); install the hinge module between the basic module and the reinforcing module near the inner side of the bridge curve, adjust the rotation angle to 2°, and activate the hydraulic locking cylinder to lock it. Outrigger installation: Select 2 support legs and 1 guide leg, install them through the multi-function interface, and connect to the signal interface; Sensor calibration: Calibrate the laser displacement sensor, tilt sensor, and stress sensor, and set the stress alarm threshold to 450MPa (assuming the basic module can withstand 90% of the upper limit of 500MPa). Bridge erection operation: The bridge erecting machine was started to lift the bridge beam. The monitoring terminal displayed information such as the stress and vibration frequency of the main beam in real time. The erection was completed smoothly without any alarms. The installation accuracy and safety met the requirements.

[0033] In the preferred scheme, in S1, the span calculation is as follows: if the bridge span is Li, the number of spans n covered by the bridge erecting machine varies depending on the process. The combined length of the basic module and the extension module is selected to be ≥∑Li+1 / 2Li, which is a reserved construction margin. Weight adaptation: If the weight of the bridge beam is less than or equal to the upper limit of the load capacity of the basic module, only the basic module and the extension module are selected; if the weight exceeds the upper limit, reinforcement modules are interspersed between adjacent modules, and the number of reinforcement modules is calculated incrementally based on the weight. In S2, the selected base frame 1 and extension module 2 are hoisted onto the assembly platform respectively, and initial positioning is achieved by the positioning pins set at their respective ends; High-strength bolts are used for fastening, and a laser displacement sensor is used to monitor the gap at the end face of the module to ensure that the gap meets the design requirements. In S3, select the corresponding type of support leg according to the erection requirements, such as support leg for main beam support and guide leg for beam guidance. Fix the support leg to the foundation frame 1 and / or extension module 2 with bolts, connect the electrical module, and realize signal communication between the support leg and the main beam. In S4, zero-point calibration is performed on all sensors to ensure the accuracy of monitoring data; Start the data processing unit, confirm that the signals of each sensor are normal through the construction monitoring terminal, and set the alarm thresholds for parameters such as stress, displacement, and vibration. In S6, the assembled modular main beam is installed on the main body of the bridge erecting machine, and the bridge erecting machine is started to hoist and erect the beam; During the bridge construction process, the sensor data of the construction monitoring terminal is monitored in real time. If the stress exceeds the threshold, the vibration is abnormal, or the pressure of the outriggers is abnormal, the operation is stopped immediately and the fault is investigated. After the bridge is erected, the outriggers and hinge modules are removed, and the main beam modules are disassembled, cleaned, and stored for future reuse.

[0034] In the preferred embodiment, the following steps are included: In S6, it is necessary to determine the angle data formed by the relative bridge direction between the scanning components 9 and the pull rope 10 at their respective positions. The angle between the pull rope 10 and the bridge direction between the two opposite scanning components 9 located on the upper side is α1, the angle between the pull rope 10 and the bridge direction between the two opposite scanning components 9 located on the lower side is α2, and the rotation angle between the two adjacent docking templates 3 is α3. Locking can only be performed when α3 = α1 + α2, thereby completing the subsequent construction steps. The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A modular main beam for a bridge erecting machine, characterized in that: The system includes a base frame (1) and an extension module (2). The extension module (2) includes a first standard section (201) and a second standard section (202). The first standard section (201) and the second standard section (202) are respectively detachably arranged on both sides of the base frame (1). The ends of the base frame (1) and the extension module (2) are respectively provided with docking templates (3). The two opposite docking templates (3) are hinged by at least two jacks (7). The angle between the base frame (1) and the extension module (2) is controlled by adjusting the extension position of the two jacks (7).

2. The modular main beam of the bridge erecting machine according to claim 1, characterized in that: Two adjacent first standard sections (201) and / or second standard sections (202) on the same side are connected by a flat brace (203) at the end away from the base frame (1), and the second standard section (202) is also provided with a reinforcing component (204).

3. The modular main beam of the bridge erecting machine according to claim 1, characterized in that: Two opposing mating templates (3) are respectively provided with a first adjusting plate (4) and a second adjusting plate (5). The first adjusting plate (4) and the second adjusting plate (5) are hinged by a pin (6), which is inserted into the first adjusting plate (4) and the second adjusting plate (5).

4. The modular main beam of the bridge erecting machine according to claim 1, characterized in that: The jack (7) is hinged on both sides and hinge seats (8) are respectively set on the two opposite mating templates (3).

5. The modular main beam of the bridge erecting machine according to claim 1, characterized in that: in Two scanning components (9) are symmetrically arranged at the bottom of the two opposite docking templates (3). The two opposite scanning components (9) are connected by a pull rope (10). The scanning component (9) includes a motor (904) and a lever (907) set on the motor (904). The lever (907) is attached to one side of the pull rope (10).

6. The modular main beam of the bridge erecting machine according to claim 5, characterized in that: The scanning component (9) includes an L-shaped plate (901) and a top plate (902). The top plate (902) is fixed to the bottom of the docking template (3) by screws (903). The lever (907) is sleeved on the output shaft (905) at the end of the motor (904) through the adapter sleeve (906). The pull rope (10) includes a telescopic cylinder (1001). A coil spring is provided inside the telescopic cylinder (1001). The end of the pull rope (10) is connected to the coil spring. The telescopic cylinder (1001) is connected to the top plate (902) by fastening nails (1002).

7. The modular main beam of the bridge erecting machine according to claim 6, characterized in that: A mounting hole (908) is provided through the top plate (902). A fastening nail (1002) is provided through the telescopic cylinder (1001) and the coil spring. The fastening nail (1002) and the mounting hole (908) are threaded together. A limiting plate (1003) is provided at the lower part of the fastening nail (1002). The limiting plate (1003) is supported at the bottom of the telescopic cylinder (1001). An adjusting sleeve (1004) is also provided on the upper side of the telescopic cylinder (1001). The adjusting sleeve (1004) and the fastening nail (1002) are threaded together. A push plate (1005) is provided on the outer side of the adjusting sleeve (1004).

8. A construction method for a modular main beam of a bridge erecting machine according to any one of claims 1 to 7, characterized in that: Includes the following steps: S1. The selection of the main beam structure and length is completed through path calculation and weight adaptation; S2. The overall assembly is completed using the base frame (1) and the extension module (2); S3. Install corresponding support legs on the lower part of the main beam; S4. Check the status of the scanning components (9) at different positions and calibrate them; S5. Start the equipment to carry out bridge erection work; S6. Adjust and lock the main beam according to the bridge orientation; S7. When curvature displacement is required, change the angle between the two mating templates (3) at different positions; S8. The corner data is recorded and confirmed by the two opposing scanning components (9) and the pull rope (10); S9. After confirming that everything is correct, proceed with the subsequent bridge erection work; S10, repeat S6~S9 until all bridge construction is completed.

9. The construction method of the modular main beam of the bridge erecting machine according to claim 8, characterized in that: in In S1, the span calculation is as follows: If the bridge span is Li, the number of spans n covered by the bridge erecting machine varies depending on the process. The combined length of the basic module and the extension module is selected as ≥∑Li+1 / extension module (2)Li (reserved construction margin). Weight adaptation: If the weight of the bridge beam is less than or equal to the upper limit of the load capacity of the basic module, only the basic module and the extension module are selected; if the weight exceeds the upper limit, reinforcement modules are interspersed between adjacent modules, and the number of reinforcement modules is calculated incrementally based on the weight. In S2, the selected base frame (1) and extension module (2) are hoisted onto the assembly platform respectively, and preliminary positioning is achieved by the positioning pins set at their respective ends; High-strength bolts are used for fastening, and a laser displacement sensor is used to monitor the gap at the end face of the module to ensure that the gap meets the design requirements. In S3, select the corresponding type of support leg according to the erection requirements (such as support leg for main beam support, guide leg for beam guidance), fix the support leg to the foundation frame (1) and / or extension module (2) with bolts, connect the electrical module, and realize signal communication between the support leg and the main beam; In S4, zero-point calibration is performed on all sensors to ensure the accuracy of monitoring data; Start the data processing unit, confirm that the signals of each sensor are normal through the construction monitoring terminal, and set the alarm thresholds for parameters such as stress, displacement, and vibration. In S6, the assembled modular main beam is installed on the main body of the bridge erecting machine, and the bridge erecting machine is started to hoist and erect the beam; During the bridge construction process, the sensor data of the construction monitoring terminal is monitored in real time. If the stress exceeds the threshold, the vibration is abnormal, or the pressure of the outriggers is abnormal, the operation is stopped immediately and the fault is investigated. After the bridge is erected, the outriggers and hinge modules are removed, and the main beam modules are disassembled, cleaned, and stored for future reuse.

10. The construction method of the modular main beam of the bridge erecting machine according to claim 9, characterized in that: Includes the following steps: In S6, it is necessary to determine the angle data between the scanning components (9) and the pull rope (10) at their respective positions relative to the bridge direction. The angle between the pull rope (10) and the bridge direction between the two opposite scanning components (9) on the upper side is α1, the angle between the pull rope (10) and the bridge direction between the two opposite scanning components (9) on the lower side is α2, and the angle between the two adjacent docking templates (3) is α3. Locking can only be performed when α3 = α1 + α2 is satisfied, and then the subsequent construction steps can be completed.

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