Steel platform monitoring method suitable for moving load working condition

Abstract

The invention relates to a steel platform monitoring method suitable for a moving load working condition, a steel platform comprises a plurality of steel pipe piles and a distribution beam, the distribution beam is erected at the top ends of the plurality of steel pipe piles, and a moving beam is slidably mounted on the distribution beam, and the method comprises the following steps that a plurality of monitoring devices are fixedly mounted on the distribution beam and the plurality of steel pipe piles respectively; a plurality of marking units are arranged on the distribution beam and the moving beam, and a total station observation system is arranged on the ground below the moving beam; in the moving process of the moving beam, deformation values of the distribution beam and the steel pipe piles are obtained through the monitoring devices, and if the deformation values exceed the deformation limit value, moving of the moving beam is stopped; in the moving process of the moving beam, coordinate data of the multiple marking units are obtained through a total station observation system; and if the coordinate data exceed the offset limit value, stopping moving the moving beam. According to the monitoring method, real-time acquisition, real-time processing and real-time feedback of monitoring data are achieved for the beam body moving working condition and the steel platform moving load working condition.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridges, and relates to a steel platform of a bridge, in particular to a steel platform monitoring method suitable for a moving load working condition. BACKGROUND

[0002] In the construction process of the traction or jacking of the beam body, a steel platform is usually arranged on the distribution beam, and a moving beam body is arranged movably on the steel platform; for the working condition of the moving load of the steel platform, professional measurement personnel operate total station instruments, level instruments and other equipment to carry out data collection of horizontal displacement and vertical displacement; then, the horizontal coordinates and vertical elevations of the structure are calculated respectively according to the original measurement records, and the calculation results are compared and analyzed with the design reference data to evaluate whether the deformation meets the specification requirements. The existing monitoring method has the following problems:

[0003] 1. When the moving beam is moving, the phenomenon of uneven friction of the two sides of the track often occurs, which can cause the axis of the moving beam to deviate from the axis of the track; and in this process, the operator cannot timely identify the deviation state from a macroscopic point of view, and it is also difficult to quickly determine the correction direction;

[0004] 2. Under the working condition of the moving load, when the force point passes through the platform distribution beam junction, the top area of the support column, stress concentration is easy to occur and exceed the safety limit; when the force point passes through the distribution beam midspan area, the deformation is easy to exceed the limit; if it is not timely detected and the operation is not timely terminated, the platform collapse accident is easy to occur. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide a steel platform monitoring method suitable for a moving load working condition, which is comprehensive and safe and reliable.

[0006] To solve the above problems, the technical scheme of the present application is as follows:

[0007] A steel platform monitoring method suitable for a moving load working condition, the steel platform comprising a plurality of steel pipe piles and a distribution beam, the top end of the plurality of steel pipe piles supporting the distribution beam, and a moving beam being slidably installed on the distribution beam, comprising the following steps:

[0008] A plurality of monitoring devices are fixed on the distribution beam and the plurality of steel pipe piles, a plurality of marking units are arranged on the distribution beam and the moving beam, and a total station observation system is arranged on the ground below the moving beam;

[0009] In the moving process of the moving beam, the deformation values of the distribution beam and the plurality of steel pipe piles are obtained by the plurality of monitoring devices, and if the deformation values exceed the deformation limit, the moving of the moving beam is stopped;

[0010] During the movement of the moving beam, coordinate data of several marked units are acquired through the total station observation system; if the coordinate data exceeds the offset limit, the movement of the moving beam is stopped.

[0011] In a further embodiment, the monitoring devices include a number of coordinate monitoring devices and a number of strain monitoring devices. Coordinate monitoring devices are installed at the top of the steel pipe pile and at the mid-span of the distribution beam, while strain monitoring devices are installed at the ground surface elevation of the steel pipe pile and at the support of the distribution beam.

[0012] In a further embodiment, several marking units include a pair of moving beam observation marks and a pair of track observation marks. The moving beam observation marks are respectively disposed at both ends of the moving beam, and the track observation marks are respectively disposed at both ends of the distribution beam outside the moving beam observation marks.

[0013] In a further embodiment, during the movement of the moving beam, coordinate data of several marker units are acquired through a total station observation system; if the coordinate data exceeds the offset limit, the movement of the moving beam is stopped, specifically including:

[0014] The line connecting a pair of track observation markers is set as the reference axis. The vertical lengths from the pair of moving beam observation markers to the reference axis are obtained through the total station observation system. The moving beam is then corrected based on the two vertical lengths.

[0015] In a further embodiment, during the movement of the moving beam, coordinate data of several marker units are acquired through a total station observation system; if the coordinate data exceeds the offset limit, the movement of the moving beam is stopped, and the method further includes:

[0016] Set a warning value that is less than the offset limit. If the coordinate data is greater than or equal to the warning value but less than the offset limit, reduce the moving speed of the moving beam.

[0017] If the coordinate data exceeds the offset limit, stop moving the beam.

[0018] In a further embodiment, a number of early warning components are fixedly mounted on the front end face of the movable beam, and a number of limiting devices are fixedly mounted on the front end of the distribution beam, with the limiting devices and the early warning components being configured accordingly.

[0019] In a further embodiment, the warning component includes a warning device, and a corresponding reflector is fixedly mounted on the limiting device;

[0020] The early warning device sends a signal to the reflector and obtains information about the distance ahead based on the signal reflected by the reflector.

[0021] In a further embodiment, the warning component also includes a protective frame and a buffer pad, with the protective frame fixedly mounted around the periphery of the warning device and the buffer pad fixedly mounted on the surface of the protective frame.

[0022] In a further embodiment, a jack is also fixed to the limiting device, with the jack facing the moving beam, suitable for adjusting the position of the moving beam.

[0023] In a further embodiment, the total station observation system includes a motorized total station, a support column, and a mounting base. The mounting base is cast on the ground, the bottom end of the support column is located inside the mounting base, and the motorized total station is fixedly mounted on the top end of the support column.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This monitoring method achieves real-time acquisition, processing, and feedback of monitoring data for both beam movement and steel platform movement load conditions, solving the problem of guidance failure caused by data lag in traditional monitoring modes. Both dynamic parameters during beam movement and key data during steel platform operation can be transmitted and analyzed synchronously, ensuring that monitoring results directly support on-site construction decisions and provide immediate and effective data support for adjusting operating conditions, thus breaking down the disconnect between monitoring and operation.

[0026] 2. For beam movement scenarios, this monitoring method allows the system to automatically collect and analyze all monitoring data, and adjust the traction equipment in conjunction with real-time deviation values. This technically avoids safety hazards caused by human error and achieves intelligent risk control during construction. For steel platform operations, macroscopic measurements of the beam axis and the moving beam axis significantly reduce the risk of excessive lateral deviation or derailment, further strengthening construction safety. Compared to the traditional manual control method, this represents a qualitative improvement in safety assurance.

[0027] 3. Compared to traditional manual beam measurement, this monitoring method employs a more convenient monitoring and control system. It eliminates the need for frequent manual intervention in measurement and judgment, significantly reducing labor costs and operation time, and substantially improving construction efficiency. For measuring the horizontal and vertical displacements of key nodes on the steel platform, it eliminates the complex procedures of traditional total station and level measurements, greatly improving operational convenience. Simultaneously, the terminal processes and summarizes all monitoring data in real time, directly providing prompts to continue or stop work, simplifying the operator's judgment process, lowering the operational threshold, and further enhancing the smoothness and efficiency of the construction process.

[0028] 4. This monitoring method obtains the motion parameters of the moving beam through trial operation of the test section, and uses displacement sensors and early warning devices to accurately determine the deceleration operation position to ensure the positioning accuracy of the moving beam. For working conditions with high precision requirements, a supporting measure of fine adjustment is achieved through jacks, forming a dual guarantee of "precise prediction + fine control". This effectively meets the positioning accuracy requirements under different scenarios. Compared with the traditional mode that lacks precise control methods, it greatly improves the construction quality and adaptability to working conditions, and provides reliable technical support for high-precision construction. Attached Figure Description

[0029] Figure 1 A side view of a monitoring device for a steel platform monitoring method applicable to moving load conditions;

[0030] Figure 2 A side view of the observation markers for a steel platform monitoring method applicable to moving load conditions;

[0031] Figure 3 A top view of the observation markers for a steel platform monitoring method applicable to moving load conditions;

[0032] Figure 4 A schematic diagram of the installation of an early warning component for a steel platform monitoring method applicable to moving load conditions;

[0033] Figure 5 A schematic diagram of the early warning component structure for a steel platform monitoring method applicable to moving load conditions;

[0034] Figure 6 A schematic diagram of a limiting device for a steel platform monitoring method applicable to moving load conditions;

[0035] Figure 7 This is a connection diagram of a coordinate monitoring device for a steel platform monitoring method applicable to moving load conditions.

[0036] Figure 8 This is a connection diagram of a strain monitoring device for a steel platform monitoring method applicable to moving load conditions;

[0037] Figure 9 This is a connection diagram of a comprehensive control system for a steel platform monitoring method applicable to moving load conditions.

[0038] Figure 10 This is a flowchart of a steel platform monitoring method applicable to moving load conditions.

[0039] In the diagram: 1. Distribution beam; 2. Steel pipe pile; 3. Coordinate monitoring device; 4. Strain monitoring device; 5. Moving beam; 6. Moving beam observation marker; 7. Track observation marker; 8. Total station observation system; 81. Motorized total station; 82. Support column; 83. Mounting base; 9. Data processing system; 10. Display device; 11. Early warning component; 111. Protective frame; 112. Buffer pad; 113. Early warning device; 12. Platform track; 13. Limiting device; 131. Reflector; 132. Jack; 14. Traction device. Detailed Implementation

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0041] 1. For the working condition of moving load on steel platform, horizontal displacement and vertical displacement are usually collected by professional surveyors using equipment such as total station and level. Then, based on the original measurement records, the horizontal coordinates and vertical elevation of the structure are calculated respectively, and the calculation results are compared and analyzed with the design benchmark data to evaluate whether its deformation meets the specifications.

[0042] In stress monitoring, strain monitoring devices are typically prioritized at critical locations where structural stress is concentrated or where the expected stress is high. Considering the dynamic stress characteristics of the steel platform under moving loads, dedicated personnel must take real-time readings at the corresponding monitoring points of each strain monitoring device. The collected strain data is then calculated and analyzed, and the actual stress value is compared with the allowable stress value in the design specifications. This allows for an accurate assessment of whether the current stress state of the steel platform exceeds safety limits, ensuring structural safety. If, during the use of the steel platform under moving loads, any deformation or stress index exceeds the limit, the monitoring personnel must immediately notify the operators on the upper part of the steel platform, requiring them to immediately cease work to prevent the structural safety risk from escalating.

[0043] During this process, when the point of force passes through the connection of the platform distribution beam or the top area of ​​the support column, stress concentration is likely to occur and exceed the safety limit; when the point of force passes through the mid-span area of ​​the distribution beam, excessive deformation is likely to occur and exceed the limit. If this is not detected in time and the operation is not stopped in time, it may easily lead to a platform collapse accident.

[0044] 2. When the moving beam moves on the steel platform, the uneven friction between the two sides of the track can easily cause inconsistent forward travel, resulting in the moving beam's axis not being parallel to the track axis. During the moving beam's advance, construction personnel typically visually estimate the distance between the moving beam and the track center to determine whether correction work is necessary.

[0045] However, because workers at height need to pay attention to their own safety, speed, and deviation while following the moving beam, it is difficult to focus their attention solely on the beam's deviation. Therefore, if the moving beam is not stopped or corrected in time based on the deviation, it is easy for it to deviate from the track due to inertia.

[0046] 3. To avoid excessive deviation between the stopping position and the design position of the moving beam, a limiting device should be installed when it approaches the design position. Furthermore, the beam should be slowed down in advance to prevent damage caused by collision with the limiting device due to excessive inertia. Typically, when the moving beam is close to the limiting device, the operator should visually judge the distance between it and the limiting device and then slow down the beam. The challenge lies in accurately performing the slowdown operation at the appropriate position. It should also be noted that in situations requiring high positioning accuracy, if the moving beam is close to the designated position and only a small distance remains, traction / pushing equipment can be used to gradually approach it. If over-traction / pushing occurs, resulting in over-positioning, targeted counter-pushing measures must be taken to adjust the moving beam to the correct position.

[0047] The existing monitoring methods have the following technical problems: (1) Conventional monitoring methods are difficult to capture the stress or coordinate change values ​​of the steel platform when the moving load is applied to a certain node; (2) Data cannot be acquired, processed and fed back to the operators on the steel platform in real time; (3) When the steel platform structure is relatively complex, the use of total station measurement will face the situation of non-line of sight; (4) If the monitoring items are relatively complicated and the number is large, the operators will face the problem of not being able to receive multiple monitoring data at the same time, which makes it difficult to make a correct judgment quickly; (5) When the moving beam moves on the steel platform, the phenomenon of uneven friction between the two sides of the track occurs frequently, which will directly cause the axis of the moving beam to deviate from the axis of the track; and in this process, the operators cannot identify the deviation status from the macro perspective in time, and it is also difficult to quickly determine the direction of correction; (6) When the moving beam approaches the design position, the operators cannot accurately determine the position where deceleration should begin by visual inspection; under the condition of high precision requirements, due to the deviation in the judgment of the deceleration timing, it is often necessary to further supplement the position adjustment measures, which increases the complexity of operation. Meanwhile, the linkage between monitoring data and traction equipment relies on manual commands, resulting in delayed response and easy deviation due to human error, making it impossible to achieve intelligent closed-loop control.

[0048] To address these technical issues, a monitoring method for steel platforms suitable for moving load conditions is proposed.

[0049] Example 1:

[0050] A monitoring method for steel platforms applicable to moving load conditions, such as Figures 1 to 10 As shown, it includes the following steps:

[0051] S101. Several monitoring devices are fixedly installed on the distribution beam 1 and several steel pipe piles 2 respectively. Several marking units are set on the distribution beam 1 and the moving beam 5. A total station observation system 8 is set on the ground below the moving beam 5.

[0052] like Figure 1 , Figure 2 As shown, the steel platform includes several steel pipe piles 2 and a distribution beam 1. The bottom ends of the steel pipe piles 2 are driven into the ground at intervals, and the top ends of the steel pipe piles 2 are all fixedly mounted on the distribution beam 1. A movable beam 5 is movably mounted on the distribution beam 1. A traction device 14 is fixedly mounted at one end of the distribution beam 1. The traction device 14 is connected to the movable beam 5 and is suitable for driving the movable beam 5 to move. Specifically, the traction device 14 is a winch or other equipment with traction / pushing functions.

[0053] like Figure 1 , Figure 2As shown, after the steel platform is erected, coordinate monitoring devices 3 are arranged at locations with large calculated deformations, and strain monitoring devices 4 are arranged at locations with large calculated stresses, based on design documents and other relevant information. Specifically, several coordinate monitoring devices 3 and strain monitoring devices 4 are fixedly installed at intervals on several steel pipe piles 2 and distribution beams 1; for steel pipe piles 2, coordinate monitoring devices 3 are installed at their top ends and strain monitoring devices 4 are installed at their ground surface elevations; for distribution beams 1, coordinate monitoring devices 3 are installed at their mid-span positions and strain monitoring devices 4 are installed at their support points.

[0054] like Figure 7 As shown, the coordinate monitoring device 3 includes a coordinate measuring element, a positioning system, and a coordinate data receiving system. The coordinate measuring element has a built-in chip and is wirelessly connected to the positioning system. The positioning system is also wirelessly connected to the coordinate data receiving system. The coordinate measuring element sends signals to the positioning system in real time and / or at a preset frequency. After receiving the signals, the positioning system acquires the location information and then sends the location information to the coordinate data receiving system to obtain the specific location of the coordinate monitoring device 3. Preferably, the positioning system is a BeiDou satellite positioning system or a GPS positioning system, but other positioning systems with the same functions can also be used.

[0055] like Figure 8 , Figure 9 As shown, the strain monitoring device 4 includes a strain measuring element, a transmission module, and a strain data receiving system. The transmission module is mounted on the strain measuring element and is connected to the strain data receiving system via wired or wireless means. The strain measuring element acquires stress data and transmits it to the strain data receiving system via the transmission module, thereby obtaining stress information at the corresponding location. Both the coordinate data receiving system and the strain data receiving system are connected to the integrated control system via wired or wireless means. The integrated control system pre-collects the initial position information of each coordinate monitoring device 3, inputs horizontal deformation limits, vertical deformation limits, and the stress design value of the strain monitoring device 4. Furthermore, the integrated control system is connected to a terminal via wired or wireless means, suitable for displaying coordinate information, stress information, and calculation results. Other functions can also be implemented through the terminal according to actual usage requirements.

[0056] Furthermore, the initial coordinate data of several coordinate monitoring devices 3 are (X1, Y1, Z1), (X2, Y2, Z2)...(Xn, Yn, Zn), and this data is sent to the integrated control system. The integrated control system inputs the horizontal displacement deformation limits [υ1], [υ2]...[υn] of several coordinate monitoring devices 3; the vertical deformation limits [ω1], [ω2]...[ωn] of several coordinate monitoring devices 3; and the stress design values ​​[σ1], [σ2]...[σn] of several coordinate monitoring devices 3.

[0057] likeFigure 2 , Figure 3 As shown, moving beam observation marks 6 are respectively set at the front and rear ends of the moving beam 5, and track observation marks 7 are respectively set at the front and rear ends of the distribution beam 1. The track observation marks 7 correspond to the moving beam observation marks 6. Two total station observation systems 8 are fixedly installed at intervals on the ground below the distribution beam 1. The installation positions of the two total station observation systems 8 correspond to the positions of the two track observation marks 7, which is suitable for real-time monitoring of the moving beam observation marks 6 and obtaining the positional relationship between the axis of the moving beam 5 and the axis of the distribution beam 1. Specifically, the total station observation system 8 includes a motor total station 81, a support column 82, and a mounting base 83. The motor total station 81 is fixedly installed at the top of the support column 82, and the bottom end of the support column 82 is fixedly installed in the mounting base 83, which is set on the ground. Preferably, the mounting base 83 is made of concrete and is integrally cast with the bottom end of the support column 82 to avoid the motor total station 81 from shaking due to vibration, wind load, and other factors, which would reduce the measurement accuracy and ensure that the motor total station 81 is firmly and stably installed. The motor total station 81 can be mounted on the support column 82 by bolts.

[0058] like Figure 2 As shown, the two total station observation systems 8 are connected to the data processing system 9 and the display device 10 via wired or wireless means, respectively; the traction device 14 is connected to the data processing system 9 via wired or wireless means. The data processing system 9 is used to receive the reference axis coordinate data of the motor total station 81, and the "coordinate + time" data of the coordinate monitoring device 3 and the strain monitoring device 4.

[0059] like Figure 3 As shown, the total station observation system 8 measures the two track observation markers 7, and sets the two track observation markers 7 as A and B, respectively. The coordinate data of the two track observation markers 7 are (Ax, Ay, Az) and (Bx, By, Bz), respectively. The two coordinate data are transmitted to the data processing system 9, and the line connecting the two track observation markers 7 is set as the reference axis LAB.

[0060] S103. During the movement of the moving beam 5, the deformation values ​​of the distribution beam 1 and the steel pipe piles 2 are acquired through several monitoring devices. If the deformation value exceeds the deformation limit, the movement of the moving beam 5 is stopped.

[0061] The traction device 14 is activated to drive the moving beam 5 to move. During the movement, i.e., when there is a moving load on the steel platform, coordinate and stress information are acquired in real time through the coordinate monitoring device 3 and the strain monitoring device 4. The integrated control system simultaneously receives the calculated data from the coordinate data receiving system and the strain data receiving system. The integrated control system calculates the distance between the real-time coordinate data of the coordinate monitoring device 3 and the initial coordinate data, and compares it with the horizontal deformation limit and the vertical deformation limit to determine whether the horizontal and vertical displacement data of the steel platform exceed the limits. The integrated control system also compares the real-time stress value of the strain monitoring device 4 with the design stress value to determine whether the stress value exceeds the limit. The integrated control system judges all horizontal displacement, vertical displacement, and stress values. When all data are within the limit, the system outputs a message to continue operation through the terminal; if one or more of them exceed the limit, the integrated control system sends a warning signal to the terminal, outputs a message to stop operation, shuts down the traction device 14, and stops driving the moving beam 5.

[0062] Specifically, the real-time coordinates of the coordinate monitoring devices 3 are acquired. The real-time coordinate data of several coordinate monitoring devices 3 are (X1', Y1', Z1'), (X2', Y2', Z2')...(Xn', Yn', Zn'), and the real-time coordinate data is sent to the integrated control system. The integrated control system calculates the real-time horizontal displacement deformation values ​​υ1, υ2...υn using the initial coordinate data and the real-time coordinate data. , ... The integrated control system calculates the real-time vertical displacement deformation values ​​ω1, ω2...ωn using initial coordinate data and real-time coordinate data. , , The strain data receiving system sends data from strain monitoring devices 4 to the integrated control system. The real-time stress values ​​of several strain monitoring devices 4 are σ1, σ2, ..., σn. The integrated control system compares the real-time horizontal displacement deformation value, real-time vertical displacement deformation value, and real-time stress value with the horizontal displacement deformation limit, vertical deformation limit, and stress design deformation value. When the result is as follows, the system outputs a message to continue operation through the terminal:

[0063] υ1<[υ1] and υ2<[υ2]…and υn<[υn]; and ω1<[ω1] and ω2<[ω2]…and ωn<[ωn]; and σ1<[σ1] and σ2<[σ2]…and σn<[σn].

[0064] If the result does not meet the above conditions, the terminal will output a message to stop the operation.

[0065] S105. During the movement of the moving beam 5, coordinate data of several marked units are acquired through the total station observation system 8; if the coordinate data exceeds the offset limit, the movement of the moving beam 5 is stopped.

[0066] like Figure 3 As shown, after the moving beam 5 begins to move forward, the total station observation system 8 corresponding to the track observation mark A tracks and monitors the corresponding moving beam observation mark 6, and sets this moving beam observation mark 6 as a; another total station observation system 8 tracks and monitors another moving beam observation mark 6, and sets this moving beam observation mark 6 as b. The motor total station 81 includes an embedded calculation system that can calculate the distance S1 between the moving beam observation mark a and the reference axis LAB, and the distance S2 between the moving beam observation mark b and the reference axis LAB. Distances S1 and S2 are used to guide the correction operation of the moving beam 5 and are displayed on the display device 10 to show the reference axis LAB. At the same time, the coordinates of the moving beam observation mark a, the coordinates of the moving beam observation mark b, the distance S1, and the distance S2 are marked, which is suitable for viewing the real-time travel position and deviation status of the moving beam 5 and dynamically grasping the construction progress.

[0067] Simultaneously, the data processing system 9 calculates the distance difference between two adjacent data acquisitions, and then divides it by the time difference to obtain the real-time moving speed of the moving beam 5. The data processing system 9 compares the calculated speed with a preset threshold and sends a command to the motor total station 81, thereby automatically adjusting the acquisition time interval of the motor total station 81. Based on the actual moving speed of the moving beam 5, the monitoring frequency is adaptively matched, which can increase the sampling frequency during high-speed advancement to ensure uninterrupted data transmission, and can also reduce the sampling frequency during low-speed advancement to avoid frequency redundancy and wasted resources.

[0068] Compare the distances S1 and S2 with the preset "3mm warning, 5mm alarm"; when the deviation reaches 3mm (warning): the data processing system 9 sends a "speed reduced to 50% of current" command to the traction device 14. After the traction device 14 executes the command, it feeds back the "decelerated" status to the data processing system 9 and displays it through the display device 10, which is suitable for guiding the correction work; when the deviation reaches 5mm (alarm): the data processing system 9 immediately sends a "power off and stop" command to the traction device 14 and triggers a field reminder. After the traction device 14 stops, it feeds back the "stopped" status, which is suitable for further correction.

[0069] like Figures 4 to 6As shown, several warning components 11 are fixedly mounted at intervals on the front end face of the movable beam 5. Each warning component 11 includes a protective frame 111, a buffer pad 112, and a warning device 113. The warning device 113 is fixedly mounted on the movable beam 5, and the protective frame 111 is fixedly mounted around the periphery of the warning device 113. The protective frame 111 has a rectangular cross-section, and its outer end face protrudes beyond the warning device 113, thus protecting the warning device 113. The buffer pad 112 is fixedly mounted around the outer end face of the protective frame 111. The buffer pad 112 has a rectangular cross-section and is made of rubber, which can cushion and absorb shocks through deformation, reducing the risk of impact damage to the warning device 113.

[0070] like Figures 4 to 6 As shown, two platform tracks 12 are fixedly mounted at intervals on the distribution beam 1, and the moving beam 5 is slidably mounted on the platform tracks 12. A limiting device 13 is fixedly mounted at the front end of each platform track 12. The limiting device 13 is a vertical plate-like structure, and two reinforcing plates are fixedly mounted at intervals on the back of the limiting device 13 to provide support. A reflector plate 131 is fixedly mounted on the top front of the limiting device 13, and the reflector plate 131 corresponds to the installation position of the warning device 113. Specifically, the warning device 113 includes a displacement sensor. During the movement of the moving beam 5, the displacement sensor continuously emits detection signals forward. The detection signals are reflected back to the displacement sensor by the reflector plate 131. The remaining moving distance of the moving beam 5 is accurately obtained through data calculation. When the remaining distance decreases to a predetermined distance, a warning message is issued through the warning device 113. The limiting device 13 has a jack 132 fixedly mounted on its front bottom. In operation conditions where the positioning accuracy of the moving beam 5 is required to be high, the limiting device 13 can serve as a reaction base for the jack 132. By applying a precise jacking force through the jack 132, the final positioning position of the moving beam 5 can be finely adjusted to meet the high-precision positioning requirements.

[0071] The warning distance is set as: L = v² / (2μg), where L is the warning distance, v is the forward speed of the moving beam 5, μ is the coefficient of friction, and g is the acceleration due to gravity. v and μ can be measured during the initial movement phase of the moving beam 5. Specifically, a section of the test track where the moving beam 5 is in uniform motion can be selected. First, the length of this path is measured, then the time taken for the moving beam 5 to traverse this path is recorded. The ratio of these two measurements is the required forward speed v. During the uniform motion phase of the moving beam 5, the traction / pushing force and the frictional force are in equilibrium. Based on this force equilibrium relationship, the formula for calculating the coefficient of friction can be derived: μ = F / mg, where F is the traction / pushing force, m is the weight of the moving beam 5, and g is the acceleration due to gravity.

[0072] Upon receiving the warning message, the traction device 14 must be shut off immediately, allowing the moving beam 5 to slide naturally to a stop solely by inertial force.

[0073] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for monitoring a steel platform under moving load conditions, the steel platform comprising a plurality of steel pipe piles (2) and a distribution beam (1), wherein the distribution beam (1) is erected at the top of the plurality of steel pipe piles (2), and a movable beam (5) is slidably installed on the distribution beam (1), characterized in that, Includes the following steps: Several monitoring devices are fixedly installed on the distribution beam (1) and several steel pipe piles (2), several marking units are set on the distribution beam (1) and the moving beam (5), and a total station observation system (8) is set on the ground below the moving beam (5). During the movement of the moving beam (5), the deformation values ​​of the distribution beam (1) and the steel pipe piles (2) are obtained by several monitoring devices. If the deformation value exceeds the deformation limit, the movement of the moving beam (5) is stopped. During the movement of the moving beam (5), the coordinate data of several of the marked units are obtained through the total station observation system (8); if the coordinate data exceeds the offset limit, the movement of the moving beam (5) is stopped.

2. The steel platform monitoring method applicable to moving load conditions according to claim 1, characterized in that, The monitoring devices include several coordinate monitoring devices (3) and several strain monitoring devices (4). The coordinate monitoring devices (3) are set at the top of the steel pipe pile (2) and at the mid-span of the distribution beam (1). The strain monitoring devices (4) are set at the ground elevation of the steel pipe pile (2) and at the support of the distribution beam (1).

3. The steel platform monitoring method applicable to moving load conditions according to claim 2, characterized in that, The marking units include a pair of moving beam observation marks (6) and a pair of track observation marks (7). The moving beam observation marks (6) are respectively set at both ends of the moving beam (5), and the track observation marks (7) are respectively set at both ends of the distribution beam (1) outside the moving beam observation marks (6).

4. The steel platform monitoring method for moving load conditions according to claim 3, characterized in that, During the movement of the moving beam (5), coordinate data of several marked units are acquired through the total station observation system (8); if the coordinate data exceeds the offset limit, the movement of the moving beam (5) is stopped, specifically including: The line connecting the pair of track observation marks (7) is set as the reference axis. The vertical lengths from the pair of moving beam observation marks (6) to the reference axis are obtained through the total station observation system (8). The moving beam (5) is corrected according to the two vertical lengths.

5. The steel platform monitoring method for moving load conditions according to claim 4, characterized in that, During the movement of the moving beam (5), the coordinate data of several of the marked units are acquired through the total station observation system (8); If the coordinate data exceeds the offset limit, the movement of the moving beam (5) is stopped, and the following is also included: Set a warning value that is less than the offset limit. If the coordinate data is greater than or equal to the warning value but less than the offset limit, reduce the moving speed of the moving beam (5). If the coordinate data is greater than the offset limit, stop the movement of the moving beam (5).

6. The steel platform monitoring method for moving load conditions according to claim 5, characterized in that, A number of early warning components (11) are fixedly mounted on the front end face of the movable beam (5), and a number of limiting devices (13) are fixedly mounted on the front end of the distribution beam (1). The number of limiting devices (13) and the number of early warning components (11) are arranged in a corresponding manner.

7. The steel platform monitoring method for moving load conditions according to claim 6, characterized in that, The warning component (11) includes a warning device (113), and a corresponding reflector (131) is fixedly mounted on the limiting device (13). The warning device (113) sends a signal to the reflector (131) and obtains the distance information ahead based on the signal reflected by the reflector (131).

8. The steel platform monitoring method for moving load conditions according to claim 7, characterized in that, The warning component (11) further includes a protective frame (111) and a buffer pad (112). The protective frame (111) is fixedly mounted on the periphery of the warning device (113), and the buffer pad (112) is fixedly mounted on the surface of the protective frame (111).

9. The steel platform monitoring method for moving load conditions according to claim 8, characterized in that, A jack (132) is also fixedly mounted on the limiting device (13), the jack (132) facing the moving beam (5), which is suitable for adjusting the position of the moving beam (5).

10. The method for monitoring a steel platform under moving load conditions according to any one of claims 1 to 9, characterized in that, The total station observation system (8) includes a motor total station (81), a support column (82) and a mounting base (83). The mounting base (83) is poured on the ground. The bottom end of the support column (82) is located inside the mounting base (83). The motor total station (81) is fixedly mounted on the top end of the support column (82).

Images