Core filling simulation device and method for thin-wall narrow flat steel pipe column

Abstract

The invention discloses a core filling simulation device and method for a thin-wall narrow and flat steel pipe column, the device comprises a sealing assembly and an injection mechanism, the sealing assembly is used for sealing two ends of the horizontally arranged thin-wall narrow and flat steel pipe column so as to form a sealed injection cavity in the thin-wall narrow and flat steel pipe column; the injection mechanism comprises an injection pump and a pressure sensor, an outlet of the injection pump is communicated with the injection cavity, and the pressure sensor is arranged at the outlet of the injection pump. The simulation test is carried out on the ground, so that instantaneous sudden burst possibly occurring during high-altitude pouring of the thin-wall narrow flat steel pipe column and the high-altitude falling risk caused by the instantaneous sudden burst are avoided, the safety of personnel and equipment in the construction process is greatly improved, threats to the surrounding environment and public safety are reduced, and the construction safety is improved. Deformation data can be accurately obtained in real time, potential safety hazards can be found in time, corresponding measures can be taken, and the accuracy and reliability of structural safety assessment are improved.

Description

Technical Field

[0001] The present application relates to the technical field of steel pipe column core filling simulation, and in particular to a thin-walled narrow flat steel pipe column core filling simulation device and method. Background Art

[0002] In modern construction, steel structures are widely used in high-rise and super-high-rise buildings due to their significant advantages, such as high strength, light weight, and rapid construction. In these buildings, the lower steel pipe columns often have thicker walls because they need to bear greater loads from above. However, as the floors rise, the load borne by the steel pipe columns gradually decreases. To achieve economical and rational structures, the wall thickness of the steel pipe columns is reduced accordingly, and some even have thin, narrow, and flat steel pipe columns with a wall thickness of only 8mm.

[0003] Concreting thin-walled, narrow, flat steel tubular columns is a critical step in the construction process. However, pouring concrete into these thin-walled, narrow, flat steel tubular columns at high altitudes raises numerous concerns and questions about structural deformation. Because thin-walled, narrow, flat steel tubular columns have relatively weak load-bearing capacity, the pressure generated during concrete pouring could cause deformation, which could adversely affect the safety of the entire main structure. Therefore, before large-scale construction operations begin, an effective method is urgently needed to examine the deformation effects of concrete pouring on thin-walled, narrow, flat steel tubular columns so that appropriate countermeasures can be developed.

[0004] The traditional construction method is usually to pour concrete into steel pipe columns in situ at high altitude. This method has obvious limitations. On the one hand, it is extremely inconvenient to observe the deformation of steel pipe columns in a high-altitude environment, and it is difficult to obtain deformation data in real time and accurately, which is not conducive to the timely discovery of potential safety hazards. On the other hand, there is an extreme and dangerous situation, that is, the thin-walled steel pipe columns may not be able to withstand the pressure of concrete poured at high altitude, resulting in an instantaneous mutation and burst of the steel column. Once this happens, the concrete will scatter and form falling objects from high altitude, which will not only pose a serious threat to personnel and equipment at the construction site, but may also have an adverse impact on the surrounding environment and public safety. Therefore, the traditional high-altitude in-situ pouring method can no longer meet the safety and reliability requirements of modern construction. It is urgent to develop a more scientific and safe simulation structure and test method to solve the above problems. Summary of the Invention

[0005] In order to solve the technical problems in the prior art, the present application provides a thin-walled narrow flat steel pipe column core filling simulation device and method.

[0006] The present application provides a thin-walled narrow flat steel pipe column core filling simulation device and method using the following technical solutions: A thin-walled narrow flat steel pipe column core pouring simulation device, comprising: A closing assembly, the closing assembly being used to close both ends of a horizontally arranged thin-walled narrow flat steel pipe column to form a sealed injection cavity in the thin-walled narrow flat steel pipe column; and The injection mechanism includes an injection pump and a pressure sensor. The outlet of the injection pump is connected to the injection cavity, and the pressure sensor is arranged at the outlet of the injection pump.

[0007] Preferably, the closing assembly includes a first closing plate and a second closing plate, the first closing plate and the second closing plate are respectively used to close the two ends of the thin-walled narrow flat steel pipe column, an injection port is opened on the first closing plate, and the outlet of the injection pump is connected to the injection port.

[0008] Preferably, the injection mechanism further includes an injection pipe, one end of the injection pipe is connected to the injection port, the other end of the injection pipe is connected to the outlet of the injection pump, and an injection valve is provided on the injection pipe.

[0009] Preferably, a discharge port is provided on the second sealing plate, a discharge pipe is connected to the discharge port, and a discharge valve is provided on the discharge pipe.

[0010] Preferably, the injection mechanism further includes a liquid tank and a hose, the inlet of the injection pump is connected to one end of the hose, the outlet of the injection pump is connected to the injection cavity, and the other end of the hose is connected to the liquid tank.

[0011] Preferably, the closing assembly includes a third closing plate and a partitioning assembly, the third closing plate is used to close one end of the thin-walled narrow flat steel pipe column, the partitioning assembly includes a plurality of spacers and connecting rods, the spacers are arranged at intervals in the thin-walled narrow flat steel pipe column to divide the inner cavity of the thin-walled narrow flat steel pipe column into a plurality of closed compartments, the connecting rods are fixedly connected to each of the spacers, and each of the spacers is provided with an air pressure sensor for detecting the pressure of the corresponding compartment; The injection mechanism also includes an injection pipe, an exhaust pipe and a control component. The injection pipe runs through each of the compartments, and a plurality of injection ports connected to each of the compartments are opened on the injection pipe. An injection valve is provided on the injection port. The exhaust pipe runs through each of the compartments, and a plurality of exhaust ports connected to each of the compartments are opened on the exhaust pipe. An exhaust valve is provided on the exhaust port. The injection pump is an air pump, and the outlet of the injection pump is connected to one end of the injection pipe. The control component is electrically connected to each of the air pressure sensors, each of the air injection valves and each of the exhaust valves, and is used to control the opening and closing of the corresponding air injection valves and exhaust valves according to the detection results of each of the air pressure sensors, so that the air pressure in each of the compartments matches the preset air pressure distribution.

[0012] Preferably, the isolation member includes an isolation plate and an airbag ring, the isolation plates are used to be spaced apart and arranged in the thin-walled narrow flat steel pipe column, each of the isolation plates is fixedly connected to the connecting rod, the airbag ring is fixedly sleeved on the outer edge of the isolation plate and abuts against the inner side wall of the thin-walled narrow flat steel pipe column, and the closing assembly further includes an inflatable member, the inflatable member is used to inflate each of the airbag rings to expand the airbag ring; The partition assembly also includes a fixed threaded sleeve, a fixed screw and a handle. The fixed threaded sleeve is fixed to the connecting rod. One end of the fixed screw is threadedly connected to the fixed threaded sleeve. The other end of the fixed screw is used to insert into the positioning hole pre-opened on the thin-walled narrow flat steel pipe column. The handle is fixed to the fixed screw.

[0013] Preferably, the isolation member further includes a plurality of connecting tubes, each of the connecting tubes being connected to an air inlet of each of the airbag rings, and the inflatable member being connected to one end of the connecting tube.

[0014] The present invention also provides a thin-walled narrow flat steel pipe column core pouring simulation method, which is applicable to the thin-walled narrow flat steel pipe column core pouring simulation device and includes the following steps: The thin-walled narrow flat steel pipe column is set horizontally, and both ends of the thin-walled narrow flat steel pipe column are sealed with a sealing assembly to form a closed injection cavity inside the thin-walled narrow flat steel pipe column. At the same time, the outlet of the injection pump is connected to the injection cavity, and a pressure sensor is installed at the outlet of the injection pump to complete the installation and connection preparation of the simulation device; Start the injection pump and inject the fluid into the thin-walled narrow flat steel pipe column through the injection pump to start the simulation of concrete pouring process. During the injection process, the pressure sensor monitors the pressure value at the injection pump outlet in real time; When the pressure value displayed by the pressure sensor is equivalent to the concrete pouring pressure value, the fluid injection is stopped and the current pressure is maintained. At this time, the simulation device has achieved the working condition of simulating the concrete pouring of thin-walled narrow flat steel pipe columns; The pressure holding state lasts for hours, during which the deformation of the thin-walled narrow flat steel pipe column is observed; An assessment is conducted based on the observed deformation of the thin-walled narrow flat steel pipe columns. If the deformation is within the specification requirements, concrete pouring construction of thin-walled narrow flat steel pipe columns can be implemented on a large scale on site; if the deformation exceeds the specification requirements, corresponding reinforcement measures must be taken.

[0015] The present application also provides a thin-walled narrow flat steel pipe column core filling simulation method, which is applicable to the thin-walled narrow flat steel pipe column core filling simulation device and includes the following steps: Place the thin-walled narrow flat steel pipe column horizontally and seal one end of the thin-walled narrow flat steel pipe column with a third sealing plate. Install the spacers in the partition assembly at intervals within the thin-walled narrow flat steel pipe column, secure each spacer with a connecting rod, and thereby divide the inner cavity of the steel pipe column into several closed compartments. Install an air pressure sensor on each spacer to detect the pressure in the corresponding compartment. Connect the injection mechanism, pass the air injection pipe and exhaust pipe through each compartment, install an air injection valve at the air injection port of the air injection pipe, and install an exhaust valve at the exhaust port of the exhaust pipe. Connect the outlet of the injection pump to one end of the air injection pipe, and electrically connect the control component to each air pressure sensor, air injection valve, and exhaust valve.

[0016] Based on the characteristics of thin-walled narrow flat steel pipe columns in actual vertical use, where the lower end bears greater pressure and the upper end bears less pressure, as well as the change in pressure on the pipe column over time during concrete solidification, the air pressure values that each compartment should reach at different time points are pre-set to form preset air pressure distribution data; Start the injection pump, and the gas enters each compartment through the gas injection pipe. The air pressure sensor monitors the air pressure of each compartment in real time and transmits the data to the control unit. The control unit controls the opening or closing of the corresponding gas injection valve and exhaust valve according to the preset air pressure distribution and the current air pressure detection results of each compartment. When the air pressure of a compartment is lower than the preset value, the control unit opens the gas injection valve corresponding to the compartment, allowing the air pump to inject more gas to increase the air pressure; if the air pressure is higher than the preset value, the exhaust valve is opened to discharge some gas to reduce the air pressure. In this way, the air pressure of each compartment is dynamically adjusted to match the preset air pressure distribution. During the entire simulation process, the deformation of the thin-walled narrow flat steel pipe columns is observed. If the deformation is within the specification requirements, the concrete pouring construction of the thin-walled narrow flat steel pipe columns can be carried out on a large scale on site; if the deformation exceeds the specification requirements, corresponding reinforcement measures must be taken.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. Improved safety: Compared with the traditional method of pouring concrete into steel pipe columns in situ at high altitude, this simulation device conducts simulation tests on the ground, avoiding the instantaneous sudden bursting of thin-walled, narrow, flat steel pipe columns during high-altitude pouring and the resulting risk of falling objects from high altitude, greatly improving the safety of personnel and equipment during the construction process and reducing threats to the surrounding environment and public safety.

[0018] 2. Convenient acquisition of deformation data: It is more convenient to observe the deformation of thin-walled narrow flat steel pipe columns in a ground environment. The deformation data can be obtained in real time and accurately, which is conducive to timely discovery of potential safety hazards so that corresponding measures can be taken, thereby improving the accuracy and reliability of structural safety assessment.

[0019] 3. Providing a basis for decision-making: By simulating the concrete pouring conditions of thin-walled, narrow, flat steel tubular columns and evaluating the observed deformation, a scientific basis for determining whether large-scale concrete pouring can be carried out on-site is provided. If the deformation is within the specification requirements, construction can proceed directly; if it is not, reinforcement measures are implemented in advance, ensuring smooth construction and structural safety, while achieving economical and rational construction.

[0020] 4. Optimize construction plans: This simulation device and test method provide an effective way to solve the problem of the deformation of thin-walled narrow flat steel pipe columns affected by concrete pouring. It helps construction units to formulate more reasonable construction plans, improve construction quality and efficiency, and meet the safety and reliability requirements of modern construction.

[0021] 5. Cost saving: Fluid is used instead of concrete for simulation experiments. Since the fluid can be discharged from the thin-walled narrow flat steel pipe column without any residue after the experiment, the thin-walled narrow flat steel pipe column can be used directly after the experiment, avoiding material waste.

[0022] 6. Partitioning assembly 14 divides the interior of thin-walled, narrow, flat steel pipe string 3 into multiple compartments. Injection mechanism 2 selectively adjusts the air pressure in each compartment, accurately simulating the pressure gradient along the height of the steel pipe string during actual vertical operation. This closely matches the actual operating conditions of higher pressure at the lower end of the pipe string and lower pressure at the upper end. This more realistically reflects the actual pressure conditions experienced by different parts of the steel pipe string, provides an accurate pressure simulation environment for studying the effects of deformation, and improves the reliability and validity of the simulation test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the thin-walled narrow flat steel pipe column core filling simulation device provided in Example 1 of the present application; Figure 2 yes Figure 1 Left view of the thin-walled narrow flat steel pipe column; Figure 3 yes Figure 1 Right view of the thin-walled narrow flat steel pipe column; Figure 4 yes Figure 1 Schematic diagram of the structure of the middle reinforcement plate; Figure 5 Schematic diagram of the structure of the thin-walled narrow flat steel pipe column core filling simulation device provided in Example 2 of the present application; Figure 6 yes Figure 5 A partial enlarged view of the middle area A; Figure 7 yes Figure 6 A partial enlarged view of the middle area B; Explanation of the accompanying drawings: 1. Closing assembly; 11. First sealing plate; 111. Injection port; 12. Second sealing plate; 121. Discharge port; 13. Third sealing plate; 14. Partitioning assembly; 141. Isolation piece; 1411. Isolation plate; 1412. Airbag ring; 1413. Connecting pipe; 142. Connecting rod; 143. Air pressure sensor; 144. Fixed threaded sleeve; 145. Fixed screw; 146. Handle; 15. Inflatable piece; 2. Injection mechanism; 21. Injection pump; 22. Pressure sensor; 23. Injection pipe; 231. Injection valve; 24. Discharge pipe; 241. Discharge valve; 25. Liquid tank; 26. Hose; 27. Air injection pipe; 271. Air injection valve; 28. Exhaust pipe; 281. Exhaust valve; 3. Thin-walled narrow flat steel pipe column; 31. Reinforcement plate; 311. Through hole. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0025] Example 1 Example 1 of the present application discloses a thin-walled narrow flat steel pipe column core filling simulation device. Figure 1 The thin-walled narrow flat steel pipe core filling simulation device includes a sealing component 1 and an injection mechanism 2.

[0026] The closing assembly 1 is used to close both ends of a horizontally arranged thin-walled narrow flat steel pipe column 3 to form a closed injection cavity inside the thin-walled narrow flat steel pipe column 3; in this embodiment, a reinforcing plate 31 is provided inside the thin-walled narrow flat steel pipe column 3, and a plurality of through holes 311 are evenly opened on the reinforcing plate 31.

[0027] The injection mechanism 2 includes an injection pump 21 and a pressure sensor 22 . The outlet of the injection pump 21 is communicated with the injection cavity, and the pressure sensor 22 is disposed at the outlet of the injection pump 21 .

[0028] The working process of Example 1 is as follows: Preparation stage: The thin-walled narrow flat steel pipe column 3 is placed horizontally, and both ends of the thin-walled narrow flat steel pipe column 3 are sealed with the sealing assembly 1, thereby forming a closed injection cavity in the thin-walled narrow flat steel pipe column 3. At the same time, the outlet of the injection pump 21 is connected to the injection cavity, and a pressure sensor 22 is installed at the outlet of the injection pump 21, completing the installation and connection preparation of the simulation device; Injection phase: Start the injection pump 21 and inject the fluid into the thin-walled narrow flat steel pipe column 3 through the injection pump 21 to start simulating the concrete pouring process. During the injection process, the pressure sensor 22 monitors the pressure value at the outlet of the injection pump 21 in real time. Simulation stage: When the pressure value displayed by the pressure sensor 22 is equivalent to the concrete pouring pressure value, the fluid injection is stopped and the current pressure is maintained (pressure holding). At this point, the simulation device has reached the working condition of simulating the concrete pouring of the thin-walled narrow flat steel pipe column 3; Observation stage: the pressure holding state lasts for 12 hours, during which the deformation of the thin-walled narrow flat steel pipe column 3 is observed; Evaluation and Decision-Making Phase: An assessment is conducted based on the observed deformation of the thin-walled, narrow, flat steel tubular columns 3. If the deformation is within regulatory requirements, large-scale concrete pouring of the thin-walled, narrow, flat steel tubular columns 3 can be carried out on-site. If the deformation exceeds regulatory requirements, appropriate reinforcement measures will be required.

[0029] The technical effects of the above technical solution include: 1. Improved safety: Compared with the traditional method of pouring concrete into steel pipe columns in situ at high altitude, this simulation device conducts simulation tests on the ground, avoiding the possible instantaneous sudden burst of thin-walled, narrow, flat steel pipe columns 3 during high-altitude pouring and the resulting risk of falling objects from high altitude. This greatly improves the safety of personnel and equipment during the construction process and reduces threats to the surrounding environment and public safety.

[0030] 2. Convenient acquisition of deformation data: It is more convenient to observe the deformation of the thin-walled narrow flat steel pipe column 3 in a ground environment. The deformation data can be obtained in real time and accurately, which is conducive to timely discovery of potential safety hazards so that corresponding measures can be taken, thereby improving the accuracy and reliability of structural safety assessment.

[0031] 3. Providing a Decision-Making Basis: By simulating the concrete pouring conditions of thin-walled, narrow, flat steel tubular columns and evaluating the observed deformation, a scientific basis for determining whether to proceed with large-scale on-site concrete pouring was established. If the deformation was within specification, construction could proceed directly; if it was not, reinforcement measures were implemented in advance, ensuring smooth construction and structural safety, while achieving both cost-effectiveness and rationality.

[0032] 4. Optimize the construction plan: This simulation device and test method provide an effective way to solve the problem of the deformation of thin-walled narrow flat steel pipe columns 3 due to the pouring of concrete. It helps construction units to formulate more reasonable construction plans, improve construction quality and efficiency, and meet the safety and reliability requirements of modern construction.

[0033] 5. Cost saving: Fluid is used instead of concrete for simulation experiments. Since the fluid can be discharged from the thin-walled narrow flat steel pipe column 3 after the experiment without any residue, the thin-walled narrow flat steel pipe column 3 can be used directly after the experiment, avoiding material waste.

[0034] In one embodiment, see Figures 1-4 The sealing component 1 includes a first sealing plate 11 and a second sealing plate 12. The first sealing plate 11 and the second sealing plate 12 are respectively used to seal the two ends of the thin-walled narrow flat steel pipe column 3. An injection port 111 is provided on the first sealing plate 11, and the outlet of the injection pump 21 is connected to the injection port 111. In this embodiment, the first sealing plate 11 and the second sealing plate 12 are respectively welded to the two ends of the thin-walled narrow flat steel pipe column 3. The sealing component 1 is composed of the first sealing plate 11 and the second sealing plate 12, which tightly seal the two ends of the thin-walled narrow flat steel pipe column 3. This design ensures that a completely closed injection cavity is formed inside the thin-walled narrow flat steel pipe column 3. A closed injection cavity is the basis for simulating concrete pouring conditions. Only by injecting fluid into a closed space can the pressure environment inside the pipe column during concrete pouring be accurately simulated, providing reliable test conditions for subsequent research on the deformation of the thin-walled narrow flat steel pipe column 3.

[0035] In one embodiment, see Figures 1-4 , the injection mechanism 2 also includes an injection pipe 23, one end of the injection pipe 23 is connected to the injection port 111, and the other end of the injection pipe 23 is connected to the outlet of the injection pump 21, and an injection valve 231 is provided on the injection pipe 23. In this embodiment, when the injection pump 21 injects fluid into the thin-walled narrow flat steel pipe column 3, the pressure gradually rises to the preset value, and the injection valve 231 can be quickly closed at this time. This precise pressure-maintaining operation ensures that the simulated concrete pouring pressure is stably maintained at the preset value. In actual concrete pouring, the pressure needs to remain stable for a period of time after reaching a certain level to simulate the continuous pressure of concrete on the thin-walled narrow flat steel pipe column 3 under actual working conditions.

[0036] In one embodiment, see Figure 1-Figure 4 , a discharge port 121 is provided on the second sealing plate 12, a discharge pipe 24 is connected to the discharge port 121, and a discharge valve 241 is provided on the discharge pipe 24. In this embodiment, the discharge port 121 provided on the second sealing plate 12, and the discharge pipe connected thereto and equipped with a discharge valve, provide a direct and efficient way to discharge the fluid in the thin-walled narrow flat steel pipe column 3 after the simulation test is completed. After completing the test process such as deformation observation of the thin-walled narrow flat steel pipe column 3, the operator only needs to open the discharge valve, and the fluid in the pipe column can be quickly discharged through the discharge pipe. Compared with the situation where there is no special discharge port and the fluid in the pipe column needs to be emptied through other complicated methods, it greatly saves the cleaning time after the test, improves the efficiency of the overall test process, and enables the entire simulation device to quickly enter the next test preparation stage.

[0037] In one embodiment, see Figure 1-Figure 4, the injection mechanism 2 also includes a liquid tank 25 and a hose 26, the inlet of the injection pump 21 is connected to one end of the hose 26, the outlet of the injection pump 21 is connected to the injection chamber, and the other end of the hose 26 is connected to the liquid tank 25. In this embodiment, the liquid tank 25 serves as a container for storing simulation fluid, providing a sufficient and stable source of fluid for the entire injection process. When simulating the concrete core filling condition of the thin-walled narrow flat steel pipe column 3, it is necessary to continuously inject fluid into the pipe column to reach an equivalent pressure. The presence of the liquid tank 25 ensures that the test will not be interrupted due to insufficient fluid during the long injection process, maintaining the continuity and integrity of the simulation test. This enables the test to accurately simulate the long-term and stable pressure application during the actual concrete pouring process, provides reliable conditions for studying the deformation characteristics of the thin-walled narrow flat steel pipe column 3 under continuous pressure, and greatly improves the accuracy and effectiveness of the simulation test results.

[0038] Example 2 Example 2 of the present application discloses a thin-walled narrow flat steel pipe column core filling simulation device. Figure 5-Figure 7 The thin-walled narrow flat steel pipe core filling simulation device includes a sealing component 1 and an injection mechanism 2.

[0039] The closing assembly 1 is used to close both ends of a horizontally arranged thin-walled narrow flat steel pipe column 3 to form a sealed injection cavity in the thin-walled narrow flat steel pipe column 3; and The injection mechanism 2 includes an injection pump 21 and a pressure sensor 22 . The outlet of the injection pump 21 is communicated with the injection cavity, and the pressure sensor 22 is disposed at the outlet of the injection pump 21 .

[0040] The closure assembly 1 includes a third closure plate 13 and a partition assembly 14. The third closure plate 13 is used to close one end of the thin-walled narrow flat steel pipe column 3. The partition assembly 14 includes a plurality of spacers 141 and connecting rods 142. The spacers 141 are arranged at intervals in the thin-walled narrow flat steel pipe column 3 to divide the inner cavity of the thin-walled narrow flat steel pipe column 3 into a plurality of closed compartments. The connecting rods 142 are fixedly connected to each of the spacers 141. Each of the spacers 141 is provided with an air pressure sensor 143 for detecting the pressure of the corresponding compartment. The injection mechanism 2 also includes an injection pipe 27, an exhaust pipe 28 and a control component. The injection pipe 27 runs through each of the compartments, and a number of injection ports connected to each of the compartments are opened on the injection pipe 27. An injection valve 271 is provided on the injection port. The exhaust pipe 28 runs through each of the compartments, and a number of exhaust ports connected to each of the compartments are opened on the exhaust pipe 28. An exhaust valve 281 is provided on the exhaust port. The injection pump 21 is an air pump, and the outlet of the injection pump 21 is connected to one end of the injection pipe 27. The control component is electrically connected to each of the air pressure sensors 143, each of the air injection valves and each of the exhaust valves, and is used to control the opening and closing of the corresponding air injection valves and exhaust valves according to the detection results of each of the air pressure sensors 143, so that the air pressure in each of the compartments matches the preset air pressure distribution.

[0041] The working process of Example 2 is as follows: Device Setup and Preparation: Place the thin-walled, narrow, flat steel pipe column 3 horizontally and seal one end of the column with the third sealing plate 13. Install the spacers 141 from the partition assembly 14 at intervals within the thin-walled, narrow, flat steel pipe column 3. Secure each spacer 141 with a connecting rod 142, thereby dividing the interior of the thin-walled, narrow, flat steel pipe column 3 into several closed compartments. Install a pressure sensor 143 on each spacer 141 to detect the pressure in the corresponding compartment. Connect the injection mechanism 2, insert the gas injection pipe 27 and the gas exhaust pipe 28 through each compartment, and install a gas injection valve 271 at the gas injection port of the gas injection pipe 27 and an exhaust valve 281 at the exhaust port of the exhaust pipe 28. Connect the outlet of the air pump (i.e., the injection pump 21) to one end of the gas injection pipe 27, and electrically connect the control unit to each pressure sensor 143, gas injection valve, and exhaust valve.

[0042] Pressure simulation settings: Based on the characteristics of the thin-walled narrow flat steel pipe column 3 in actual vertical use, which has a higher pressure at the lower end and a lower pressure at the upper end, and the change of the pressure on the pipe column over time during the concrete solidification process, the air pressure values that each cavity should reach at different time points are pre-set to form preset air pressure distribution data.

[0043] Simulated injection process: The air pump (injection pump 21) is activated, and gas enters each compartment through the gas injection pipe 27. The air pressure sensor 143 monitors the air pressure in each compartment in real time and transmits the data to the control unit. Based on the preset air pressure distribution and the current air pressure detection results for each compartment, the control unit controls the opening or closing of the corresponding air injection valve 271 and exhaust valve 281. When the air pressure in a compartment falls below the preset value, the control unit opens the corresponding air injection valve 271, allowing the air pump to inject more gas to increase the pressure. If the air pressure exceeds the preset value, the exhaust valve 281 opens to discharge some gas to reduce the pressure. This dynamically adjusts the air pressure in each compartment to match the preset air pressure distribution.

[0044] Deformation observation and data recording: During the entire simulation process, the deformation of the thin-walled narrow flat steel pipe column 3 is observed. If the deformation is within the specification requirements, the concrete pouring construction of the thin-walled narrow flat steel pipe column 3 can be implemented on a large scale on site; if the deformation exceeds the specification requirements, corresponding reinforcement measures must be taken.

[0045] The technical effects of the above solution include: 1. Highly simulated real-world pressure distribution: The thin-walled, narrow, flat steel pipe string 3 is divided into multiple compartments using partitioning assembly 14. The injection mechanism 2 selectively adjusts the air pressure in each compartment, accurately simulating the pressure gradient along the height of the steel pipe string during actual vertical operation. This closely matches the actual operating conditions, where the lower end of the pipe string bears greater pressure and the upper end bears less pressure. This more realistically reflects the actual pressure conditions experienced by different parts of the steel pipe string, providing an accurate pressure simulation environment for studying the effects of deformation and improving the reliability and validity of the simulation test results.

[0046] 2. Accurately simulate pressure changes over time: During the actual concrete injection and setting process, the pressure on the pipe string changes over time. This technical solution uses the controller to precisely adjust the pressure changes in each compartment over time according to a preset program and in combination with feedback from the air pressure sensor 143. This allows simulation tests to fully replicate the impact of dynamic pressure changes during concrete pouring on thin-walled, narrow, flat steel pipe strings.

[0047] 3. Improved deformation detection accuracy and safety: Because the simulator is located horizontally on the ground, it facilitates real-time and accurate observation of the deformation of the thin-walled, narrow, flat steel pipe column 3, compared to traditional high-altitude in-situ pouring, allowing for detailed deformation data. This also avoids the safety risks associated with high-altitude operations, such as the sudden bursting of thin-walled, narrow, flat steel pipe columns due to their inability to withstand the high-altitude pouring pressure, resulting in the scattering of concrete and dangerous falling objects. This ensures the safety of construction personnel and equipment, and reduces threats to the surrounding environment and public safety.

[0048] In one embodiment, the isolation member 141 includes an isolation plate 1411 and an airbag ring 1412. The isolation plates 1411 are used to be spaced apart and arranged in the thin-walled narrow flat steel pipe column 3. Each of the isolation plates 1411 is fixedly connected to the connecting rod 142. The airbag ring 1412 is fixedly sleeved on the outer edge of the isolation plate 1411 and abuts against the inner side wall of the thin-walled narrow flat steel pipe column 3. The closure assembly 1 also includes an inflatable member 15. The inflatable member 15 is used to inflate each of the airbag rings 1412 to expand the airbag rings 1412. The partition assembly 14 also includes a fixed threaded sleeve, a fixed screw and a handle. The fixed threaded sleeve is fixed to the connecting rod. One end of the fixed screw is threadedly connected to the fixed threaded sleeve. The other end of the fixed screw is used to insert into the positioning hole pre-opened on the thin-walled narrow flat steel pipe column. The handle is fixed to the fixed screw. The fixing screw can fix the connecting rod and the thin-walled narrow flat steel pipe column to each other to prevent the isolation piece 141 from axial movement.

[0049] In this embodiment, each isolation plate 1411 is connected by a connecting rod 142 so that the isolation plates 1411 are arranged at predetermined intervals. At this time, the airbag ring 1412 is fixedly mounted on the outer edge of the isolation plate 1411. The assembled connecting rod 142 with the isolation plate 1411 and the airbag ring 1412 is placed as a whole into the thin-walled narrow flat steel pipe column 3, and the installation of the partition assembly 14 in the steel pipe column is preliminarily completed. The airbag ring 1412 is inflated in turn using the inflatable member 15. As the inflation process proceeds, the airbag ring 1412 gradually expands until it is in close contact with the inner wall of the thin-walled narrow flat steel pipe column 3, thereby forming a good seal between each isolation plate 1411 and the inner wall of the steel pipe column, ensuring that the inner cavity of the thin-walled narrow flat steel pipe column 3 is effectively divided into multiple closed compartments. Positioning holes are pre-opened on the thin-walled narrow flat steel pipe column 3. Thread one end of the fixing screw into the fixing threaded sleeve fixed to the connecting rod, turn the handle to screw the fixing screw into the fixing threaded sleeve and insert the other end of the fixing screw into the corresponding positioning hole on the thin-walled narrow flat steel pipe column 3. In this way, the connecting rod and the thin-walled narrow flat steel pipe column 3 are fixed to each other to prevent the isolation piece 141 from moving axially due to factors such as airflow pressure during the simulation process. In this embodiment, after inflation, the airbag ring 1412 fits tightly against the inner wall of the thin-walled, narrow, flat steel pipe column 3, effectively preventing gas flow between the individual compartments. This ensures independent and precise regulation of the pressure in each compartment, ensuring that the pressure state of each compartment is controlled solely by the injection mechanism 2, without inaccurate pressure simulation due to cross-compartmental gas flow. This improves the accuracy of the simulation device's simulation of actual pressure distribution and changes. Compared to some traditional rigid sealing structures, the design of the airbag ring 1412 eliminates the need for rigorous machining and debugging of the fit between the isolation plate 1411 and the inner wall of the steel pipe column during installation. A good seal can be achieved simply by inflation, greatly simplifying the installation process and improving work efficiency. The fixed structure, consisting of the fixed threaded sleeve, fixed screw, and handle, effectively secures the connecting rod to the thin-walled, narrow, flat steel pipe column 3. During the simulation process, when the injection pump 21 injects gas into the compartment, changes in compartment pressure may generate axial thrust on the isolation member 141. The fixed structure can resist this thrust, preventing the isolation member 141 from axial movement. The stability of the partition assembly 14 during the simulation process is ensured, thereby maintaining the integrity of each compartment and the accuracy of pressure regulation, ensuring that the simulation test can be carried out stably and reliably.

[0050] In one embodiment, the isolation member 141 further includes a plurality of connecting tubes 1413, each of which is connected to the air inlet of each airbag ring 1412. The inflatable member 15 is connected to one end of each connecting tube 1413. In this embodiment, the connecting tubes 1413 connect the air inlet of each airbag ring 1412 and are connected to the inflatable member 15, allowing the operator to simultaneously inflate multiple airbag rings 1412 through a single inflation interface (i.e., the connection between the inflatable member 15 and the connecting tube 1413). Compared to the method of individually connecting each airbag ring 1412 to the inflation device for inflation, this design significantly reduces the number of steps and time required for inflation, thereby improving work efficiency.

[0051] The technical effects of the technical solution provided by this application include: 1. Improved safety: Compared with the traditional method of pouring concrete into steel pipe columns in situ at high altitude, this simulation device conducts simulation tests on the ground, avoiding the possible instantaneous sudden burst of thin-walled, narrow, flat steel pipe columns 3 during high-altitude pouring and the resulting risk of falling objects from high altitude. This greatly improves the safety of personnel and equipment during the construction process and reduces threats to the surrounding environment and public safety.

[0052] 2. Convenient acquisition of deformation data: It is more convenient to observe the deformation of the thin-walled narrow flat steel pipe column 3 in a ground environment. The deformation data can be obtained in real time and accurately, which is conducive to timely discovery of potential safety hazards so that corresponding measures can be taken, thereby improving the accuracy and reliability of structural safety assessment.

[0053] 3. Providing a Decision-Making Basis: By simulating the concrete pouring conditions of thin-walled, narrow, flat steel tubular columns and evaluating the observed deformation, a scientific basis for determining whether to proceed with large-scale on-site concrete pouring was established. If the deformation was within specification, construction could proceed directly; if it was not, reinforcement measures were implemented in advance, ensuring smooth construction and structural safety, while achieving both cost-effectiveness and rationality.

[0054] 4. Optimize the construction plan: This simulation device and test method provide an effective way to solve the problem of the deformation of thin-walled narrow flat steel pipe columns 3 due to the pouring of concrete. It helps construction units to formulate more reasonable construction plans, improve construction quality and efficiency, and meet the safety and reliability requirements of modern construction.

[0055] 5. Cost saving: Fluid is used instead of concrete for simulation experiments. Since the fluid can be discharged from the thin-walled narrow flat steel pipe column 3 after the experiment without any residue, the thin-walled narrow flat steel pipe column 3 can be used directly after the experiment, avoiding material waste.

[0056] 6. Partitioning assembly 14 divides the interior of thin-walled, narrow, flat steel pipe string 3 into multiple compartments. Injection mechanism 2 selectively adjusts the air pressure in each compartment, accurately simulating the pressure gradient along the height of the steel pipe string during actual vertical operation. This closely matches the actual operating conditions of higher pressure at the lower end of the pipe string and lower pressure at the upper end. This more realistically reflects the actual pressure conditions experienced by different parts of the steel pipe string, provides an accurate pressure simulation environment for studying the effects of deformation, and improves the reliability and validity of the simulation test results.

[0057] The specific implementation methods of the present application described above do not constitute a limitation on the scope of protection of the present application. Any other corresponding changes and modifications made based on the technical concept of the present application should be included in the scope of protection of the present application.

Claims

1. A thin-walled narrow flat steel pipe column core pouring simulation device, characterized by: include: A closing assembly (1) is used to close both ends of a horizontally arranged thin-walled narrow flat steel pipe column (3) to form a sealed injection cavity in the thin-walled narrow flat steel pipe column (3); as well as, An injection mechanism (2) includes an injection pump (21) and a pressure sensor (22), wherein the outlet of the injection pump (21) is connected to the injection cavity, and the pressure sensor (22) is arranged at the outlet of the injection pump (21).

2. The thin-walled narrow flat steel pipe column core pouring simulation device according to claim 1 is characterized in that: The sealing assembly (1) comprises a first sealing plate (11) and a second sealing plate (12), wherein the first sealing plate (11) and the second sealing plate (12) are respectively used to seal the two ends of the thin-walled narrow flat steel pipe column (3), and an injection port (111) is provided on the first sealing plate (11), and the outlet of the injection pump (21) is connected to the injection port (111).

3. The thin-walled narrow flat steel pipe column core pouring simulation device according to claim 2, characterized in that: The injection mechanism (2) further comprises an injection pipe (23), one end of the injection pipe (23) being in communication with the injection port (111), the other end of the injection pipe (23) being in communication with the outlet of the injection pump (21), and an injection valve (231) being provided on the injection pipe (23).

4. The thin-walled narrow flat steel pipe column core pouring simulation device according to claim 2, characterized in that: The second sealing plate (12) is provided with a discharge port (121), the discharge port (121) is connected to a discharge pipe (24), and the discharge pipe (24) is provided with a discharge valve (241).

5. The thin-walled narrow flat steel pipe column core pouring simulation device according to claim 1 is characterized in that: The injection mechanism (2) further comprises a liquid tank (25) and a hose (26), the inlet of the injection pump (21) being in communication with one end of the hose (26), the outlet of the injection pump (21) being in communication with the injection cavity, and the other end of the hose (26) being in communication with the liquid tank (25).

6. The thin-walled narrow flat steel pipe column core pouring simulation device according to claim 1, characterized in that: The sealing assembly (1) includes a third sealing plate (13) and a partition assembly (14), wherein the third sealing plate (13) is used to seal one end of the thin-walled narrow flat steel pipe column (3), and the partition assembly (14) includes a plurality of spacers (141) and connecting rods (142), wherein the spacers (141) are arranged at intervals in the thin-walled narrow flat steel pipe column (3) to divide the inner cavity of the thin-walled narrow flat steel pipe column (3) into a plurality of closed compartments, and the connecting rods (142) are fixedly connected to each of the spacers (141), and each of the spacers (141) is provided with an air pressure sensor (143) for detecting the pressure of the corresponding compartment; The injection mechanism (2) further comprises an air injection pipe (27), an exhaust pipe (28) and a control member, wherein the air injection pipe (27) passes through each of the compartments, and is provided with a plurality of air injection ports respectively connected to each of the compartments, and an air injection valve (271) is provided on the air injection ports, and the exhaust pipe (28) passes through each of the compartments, and is provided with a plurality of exhaust ports respectively connected to each of the compartments, and an exhaust valve (281) is provided on the exhaust ports. The injection pump (21) is an air pump, and the outlet of the injection pump (21) is connected to one end of the air injection pipe (27). The control component is electrically connected to each of the air pressure sensors (143), each of the air injection valves (271) and each of the air exhaust valves (281), and is used to control the opening and closing of the corresponding air injection valves (271) and the air exhaust valves (281) according to the detection results of each of the air pressure sensors (143), so that the air pressure in each of the compartments matches the preset air pressure distribution.

7. The thin-walled narrow flat steel pipe column core pouring simulation device according to claim 6, characterized in that: The isolation member (141) includes an isolation plate (1411) and an airbag ring (1412), wherein the isolation plate (1411) is used to be spaced apart and arranged in the thin-walled narrow flat steel pipe column (3), and each isolation plate (1411) is fixedly connected to the connecting rod (142). The airbag ring (1412) is fixedly sleeved on the outer edge of the isolation plate (1411) and abuts against the inner side wall of the thin-walled narrow flat steel pipe column (3). The closing component (1) also includes an inflatable member (15), and the inflatable member (15) is used to inflate each airbag ring (1412) to expand the airbag ring (1412); The partition assembly (14) also includes a fixed threaded sleeve (144), a fixed screw (145) and a handle (146), wherein the fixed threaded sleeve (144) is fixed to the connecting rod (142), one end of the fixed screw (145) is threadedly connected to the fixed threaded sleeve (144), and the other end of the fixed screw (145) is used to be inserted into a positioning hole pre-opened on the thin-walled narrow flat steel pipe column (3), and the handle (146) is fixed to the fixed screw (145).

8. The thin-walled narrow flat steel pipe column core pouring simulation device according to claim 7, characterized in that: The isolation member (141) further includes a plurality of connecting tubes (1413), wherein the connecting tubes (1413) are connected to the air inlet of each of the airbag rings (1412), and the inflatable member (15) is connected to one end of the connecting tubes (1413).

9. A method for simulating core filling of a thin-walled narrow flat steel pipe column (3), characterized by: The device is applicable to the thin-walled narrow flat steel pipe column core filling simulation device as claimed in any one of claims 1 to 8, and comprises the following steps: The thin-walled narrow flat steel pipe column (3) is horizontally arranged, and both ends of the thin-walled narrow flat steel pipe column (3) are closed using a closing assembly (1), thereby forming a closed injection cavity in the thin-walled narrow flat steel pipe column (3). At the same time, the outlet of the injection pump (21) is connected to the injection cavity, and a pressure sensor (22) is arranged at the outlet of the injection pump (21), thereby completing the installation and connection preparation of the simulation device; The injection pump (21) is started, and the fluid is injected into the thin-walled narrow flat steel pipe column (3) through the injection pump (21), and the concrete pouring process is simulated. During the injection process, the pressure sensor (22) monitors the pressure value at the outlet of the injection pump (21) in real time; When the pressure value displayed by the pressure sensor (22) is equivalent to the concrete pouring pressure value, the fluid injection is stopped and the current pressure is maintained. At this time, the simulation device has reached the working condition of simulating the concrete pouring core of the thin-walled narrow flat steel pipe column (3); The pressure holding state lasts for hours, during which the deformation of the thin-walled narrow flat steel pipe column (3) is observed; An assessment is made based on the observed deformation of the thin-walled narrow flat steel pipe column (3). If the deformation is within the specification requirements, the concrete pouring construction of the thin-walled narrow flat steel pipe column (3) can be implemented on site on a large scale. If the deformation exceeds the specification requirements, corresponding reinforcement measures must be taken.

10. A method for simulating core filling of a thin-walled narrow flat steel pipe column (3), characterized by: The device is applicable to the thin-walled narrow flat steel pipe column core filling simulation device as claimed in any one of claims 6 to 8, and comprises the following steps: Place the thin-walled narrow flat steel pipe column (3) horizontally, use the third sealing plate (13) to seal one end of the thin-walled narrow flat steel pipe column, install the isolation pieces (141) in the partition assembly (14) in the thin-walled narrow flat steel pipe column (3) at intervals, fix each isolation piece (141) by a connecting rod (142), thereby dividing the inner cavity of the steel pipe column into a plurality of closed compartments, install an air pressure sensor (143) on each isolation piece (141) for detecting the pressure of the corresponding compartment, connect the injection mechanism (2), pass the air injection pipe (27) and the exhaust pipe (28) through each compartment, install an air injection valve (271) at the air injection port of the air injection pipe (27), install an exhaust valve (281) at the exhaust port of the exhaust pipe (28), connect the outlet of the injection pump (21) with one end of the air injection pipe (27), and electrically connect the control component with each air pressure sensor (143), the air injection valve (271) and the exhaust valve (281); According to the characteristics of the thin-walled narrow flat steel pipe column (3) in actual vertical use state that the lower end bears a large pressure and the upper end bears a small pressure, and the change of the pressure on the pipe column over time during the concrete solidification process, the air pressure value that each compartment should reach at different time points is pre-set to form preset air pressure distribution data; The injection pump (21) is started, and gas enters each compartment through the gas injection pipe (27). The air pressure sensor (143) monitors the air pressure of each compartment in real time and transmits the data to the control unit. The control unit controls the opening or closing of the corresponding gas injection valve (271) and the exhaust valve (281) according to the preset air pressure distribution and the current air pressure detection results of each compartment. When the air pressure of a compartment is lower than the preset value, the control unit opens the gas injection valve (271) corresponding to the compartment, so that the air pump injects more gas to increase the air pressure; If the air pressure is higher than the preset value, the exhaust valve (281) is opened to discharge part of the gas to reduce the air pressure, thereby dynamically adjusting the air pressure of each compartment to match the preset air pressure distribution; During the entire simulation process, the deformation of the thin-walled narrow flat steel pipe column (3) is observed. If the deformation is within the specification requirements, the concrete pouring construction of the thin-walled narrow flat steel pipe column (3) can be implemented on site on a large scale; if the deformation exceeds the specification requirements, corresponding reinforcement measures must be taken.

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