Narrow and flat concrete-filled steel tubular column process test structure and detection test method

Abstract

The invention relates to the technical field of building test and detection, in particular to a narrow and flat concrete-filled steel tubular column process test structure and detection test method.The narrow and flat concrete-filled steel tubular column process test structure comprises a base, a test column and an operation platform; the test column is fixed on the base, and an internal cavity of the test column is matched with an internal cavity of an actually constructed steel pipe column; the test column comprises a narrow flat steel pipe and a plurality of separators; a pouring cavity used for being filled with concrete is formed in the narrow flat steel pipe. The plurality of separators are vertically arranged in the pouring cavity and used for simulating a vertical partition plate in a steel pipe column in actual construction so as to divide the pouring cavity into a plurality of cavities, and communicating holes communicating the two sides of the separators are formed in the separators; the operation platform is arranged outside the test column and used for supporting the test column. The method has the effect of improving the compactness detection efficiency of the narrow and flat concrete filled steel tubular column and the accuracy of a detection result.

Description

Technical Field

[0001] The present application relates to the field of building testing and detection technology, and in particular to a narrow flat steel tube concrete column process test structure and detection test method. Background Art

[0002] In the construction industry, concrete-filled steel tube (CFST) columns are widely used in various building structures due to their superior mechanical properties, such as high compressive strength and good seismic resistance. Among them, narrow flat CFST columns, due to their unique shape, are gaining increasing attention and use in construction projects with limited space or special requirements for appearance. A narrow flat CFST column is essentially a rectangular steel tube with vertical partitions installed on its inner wall to divide the steel tube into multiple chambers. The partitions also have connecting holes that connect the chambers on both sides of the partition.

[0003] Ultrasonic detection is currently the primary method used to test the density of concrete within narrow, flat concrete-filled steel tubular columns. This method utilizes the differences in ultrasonic propagation characteristics in different media to analyze the density of the concrete within the column by measuring parameters such as the propagation time and amplitude of the ultrasonic wave within the steel tubular column. This method offers the advantages of being non-destructive and having a wide detection range, enabling it to accurately reflect the quality of the concrete within.

[0004] However, ultrasonic testing for density testing of narrow, flat, concrete-filled steel tubular columns after core pouring is often questionable. This makes it difficult to accurately determine the actual density of the concrete inside the narrow, flat, concrete-filled steel tubular columns, thus failing to provide a reliable basis for subsequent construction and potentially impacting the safety and stability of the building structure. Summary of the Invention

[0005] In order to improve the efficiency of density detection of narrow flat steel tube concrete columns and the accuracy of detection results, the present application provides a narrow flat steel tube concrete column process test structure and detection test method.

[0006] The narrow flat steel tube concrete column process test structure provided in this application adopts the following technical solution: base; A test column is fixed to the base, and the internal cavity of the test column matches the internal cavity of the steel pipe column actually constructed; the test column includes a narrow flat steel pipe and a plurality of separators; a casting cavity for filling concrete is formed inside the narrow flat steel pipe; a plurality of separators are vertically arranged in the casting cavity, used to simulate the vertical partitions in the steel pipe column actually constructed, so as to divide the casting cavity into multiple chambers, and the separators are provided with connecting holes connecting the two sides of the separators; An operating platform is arranged outside the test column to support the test column.

[0007] By adopting the above technical solution, a test column is provided that matches the internal cavity of the actual construction steel pipe column. Narrow flat steel tubes and separators are used to accurately simulate the concrete pouring chamber structure under real construction conditions. This structure can ensure that the test conditions are highly consistent with the actual construction conditions, thereby improving the reliability of the test results. During the test, concrete is poured into the pouring cavity and waited for it to solidify. First, ultrasonic testing equipment is used to perform non-destructive testing on the density of the concrete and record the relevant data. Subsequently, the concrete is visually inspected by peeling off the narrow flat steel tube to intuitively judge the actual density of the concrete. The visual inspection results are compared and analyzed with the ultrasonic test results to verify the accuracy of the ultrasonic test. This method not only avoids destructive testing of the actual construction column, but also significantly improves the detection efficiency, provides a more reliable basis for subsequent construction, and helps to optimize the construction process and quality control process of narrow flat steel tube concrete columns.

[0008] Optionally, the height of the test column is smaller than the height of the steel pipe column in actual construction; and the test column also includes a formwork system, which is covered on the outside of the narrow flat steel pipe and is used to form a contoured cavity that is connected to the pouring cavity and matches the shape; the sum of the heights of the contoured cavity and the pouring cavity is consistent with the height of the steel pipe column in actual construction, so as to simulate the flow path of high-throw concrete pouring.

[0009] By adopting the above technical solution, the height of the test column is smaller than the actual height of the steel pipe column in construction, which can significantly reduce the amount of concrete and materials used, thereby effectively reducing the cost of the test. At the same time, the shortened test column height can also simplify the test operation process and improve the test efficiency. In addition, a formwork system is added and a contoured cavity is formed on the outside of the narrow flat steel tube, so that the sum of the heights of the contoured cavity and the pouring cavity is equal to the actual height of the steel pipe column in construction, accurately simulating the complete flow path of high-throw concrete pouring. This design not only makes up for the difference in flow path that may be caused by the reduction in the height of the test column, but also ensures a high degree of consistency between the test conditions and the actual construction environment, providing a reliable guarantee for accurately evaluating the density of the concrete inside the narrow flat steel tube concrete column.

[0010] Optionally, the template system includes wooden templates, wooden squares and fasteners; the wooden templates are used to splice to form a contoured cavity, and the wooden squares are abutted against the outside of the wooden templates to cooperate with the fasteners to lock the wooden templates and fix them on the operating platform.

[0011] By employing this technical solution, the wooden formwork is spliced ​​together to form a contoured cavity, accurately simulating the concrete pouring path in actual construction, improving the accuracy of the test. The wooden planks and fasteners used to lock the wooden formwork and secure it to the operating platform ensure the stability of the contoured cavity, preventing deformation or displacement during the concrete pouring process, thereby ensuring the reliability of the test results.

[0012] Optionally, the narrow flat steel pipe includes a structure formed by cutting a steel pipe used in actual construction; the partition includes an integral partition, and both side edges of the integral partition are respectively connected to the two inner walls of the narrow flat steel pipe.

[0013] By adopting this technical solution, using narrow flat steel tubes cut from actual construction steel pipes and integral partitions as separators, the internal structural characteristics of narrow flat steel tube concrete-filled columns in actual construction can be accurately simulated. This design ensures a high degree of consistency between the test structure and the actual construction environment, thereby improving the reliability and accuracy of the test results. Specifically, the selection of narrow flat steel tubes ensures the authenticity of material properties, while the installation of integral partitions effectively restores the vertical partition's function of separating the concrete casting cavity, further enhancing the test's simulation accuracy.

[0014] Optionally, the narrow flat steel tube includes at least two oppositely arranged wide-side steel plates and at least two oppositely arranged narrow-side steel plates; the two wide-side steel plates and the two narrow-side steel plates are alternately detachably connected to form a casting cavity between the four.

[0015] By adopting the above technical solution, the narrow flat steel tube is designed as a detachable structure composed of wide-side steel plates and narrow-side steel plates. This not only allows the size and shape of the casting cavity to be flexibly adjusted to meet the needs of different test conditions, but also greatly enhances the versatility and adaptability of the test structure. This modular design allows the test column to be precisely configured according to actual construction parameters, thereby more realistically simulating the construction site environment. In addition, the detachable connection method facilitates the rapid separation of the narrow flat steel tube from the internal concrete after the test is completed, providing convenient conditions for visually checking the density of the concrete, reducing the risk of damage to the concrete body, and further improving the accuracy and reliability of the test results.

[0016] Optionally, the partition includes a plurality of strip-shaped telescopic plates and at least two serial rods, the plurality of strip-shaped telescopic plates are arranged vertically side by side and sealed and abutted against each other in pairs to form an integral structure, the strip-shaped telescopic plates can be telescoped along a direction perpendicular to their own length and a splicing direction, and the connecting hole is formed between the abutting surfaces of two of the plurality of strip-shaped telescopic plates; the two serial rods respectively penetrate the head and tail ends of the plurality of strip-shaped telescopic plates along a direction perpendicular to the length of the strip-shaped telescopic plates, so as to keep the plurality of strip-shaped telescopic plates aligned along the splicing direction.

[0017] By adopting the above-mentioned technical solution, the design of multiple, parallel, and retractable strip-shaped expandable panels effectively solves the problems associated with traditional, one-piece vertical partitions. Specifically, traditional vertical partitions become permanently embedded in the concrete after solidification, making the concrete density test results within the connecting holes easily affected by their structure and position, and difficult to separate the vertical partitions and concrete for visual inspection. In contrast, the splicing and retractable nature of the strip-shaped expandable panels in this solution allows for smooth separation of the partition from the concrete. During the separation process, the cast surfaces on either side of the strip-shaped expandable panel are first brought together and retracted, freeing one of the cast surfaces from the concrete. Subsequently, the strip-shaped expandable panel is bent into the formed gap, further freeing the other cast surface from the concrete, completing the separation of the strip-shaped expandable panel from the concrete. Furthermore, because the partition is composed of multiple spliced ​​strip-shaped expandable panels, separation can be performed in batches, requiring only a smaller contact area to be separated each time, significantly reducing the difficulty of separation. This design not only facilitates subsequent testing of the concrete quality at the connecting holes but also improves the accuracy and reliability of the overall test results.

[0018] Optionally, a clamping groove is provided on one side of the two wide-edge steel plates close to the casting cavity in the vertical direction; the side of the strip-shaped telescopic plate at the head end of the multiple strip-shaped telescopic plates facing away from the other strip-shaped telescopic plates, and the side of the strip-shaped telescopic plate at the end end of the multiple strip-shaped telescopic plates facing away from the other strip-shaped telescopic plates are respectively clamped in the two clamping grooves.

[0019] By adopting this technical solution, the slotted arrangement provides a precise mounting location for the strip-shaped expansion plates, enabling them to be quickly positioned and securely fixed to the wide-edge steel plate, significantly improving the assembly efficiency of the test structure. This snap-fit ​​method is not only simple to operate but also effectively prevents the separators from shifting due to concrete pressure during the concrete pouring process, ensuring stable and reliable isolation between the chambers. Furthermore, the snap-fit ​​design facilitates the subsequent separation of the wide-edge steel plate and the separators, simplifying the disassembly process after the test.

[0020] Optionally, the strip telescopic plate includes a first strip plate, a second strip plate, an elastic member and an adjusting bolt, the first strip plate and the second strip plate are arranged relatively parallel; the elastic member is arranged between the first strip plate and the second strip plate, and is used to make the two move away from each other; the adjusting bolt is passed through the first strip plate and the second strip plate; tightening the adjusting bolt can make the first strip plate and the second strip plate approach each other; loosening the adjusting bolt can make the first strip plate and the second strip plate move away from each other under the action of the elastic member; when the strip telescopic plate is clamped in the clamping groove, the two opposite sides of the first strip plate and the second strip plate respectively abut the two inner side walls of the clamping groove.

[0021] By adopting the above-mentioned technical solution, the structural design of the strip-shaped expansion panels enables convenient assembly and disassembly of the divider. During assembly, one expansion panel is first placed in the snap-in slot. By loosening the adjustment bolt, the elastic member forces the first and second strip panels away from each other, pressing against the inner sidewalls of the snap-in slot, ensuring the expansion panel's secure installation within the slot. Subsequently, the thickness of the remaining expansion panels is adjusted and they are sequentially spliced ​​side by side. Two connecting rods are inserted through the ends of the multiple expansion panels, achieving precise alignment along the splicing direction, forming a complete divider and effectively simulating the vertical partition structure used in actual construction. During disassembly, the first strip plate or the second strip plate is brought closer to each other by tightening the adjusting bolt, thereby forming a certain gap between one side of the strip telescopic plate and the concrete, providing a certain amount of movement space for the subsequent peeling off of the other side of the strip telescopic plate from the concrete. Then, the strip telescopic plate is bent toward one side of the gap, so that the other side of the strip telescopic plate is also peeled off from the concrete, thus completing the rapid separation of the strip telescopic plate as a whole from the concrete, thereby improving the efficiency and convenience of the test operation.

[0022] Optionally, when the two surfaces of the first strip plate and the second strip plate facing away from each other respectively abut the two inner side walls of the clamping groove, the two side walls of the serial rod respectively abut the two surfaces of the first strip plate and the second strip plate facing each other.

[0023] By adopting this technical solution, the width design of the connecting rods ensures that the multiple strip-shaped expansion panels remain precisely aligned during the splicing process, thereby improving the overall stability and reliability of the divider. This design effectively avoids the misalignment of the strip-shaped expansion panels caused by mismatched connecting rod sizes, ensures the effective separation of the chambers within the casting cavity, and further improves the accuracy of the test structure in simulating the actual construction environment.

[0024] Optionally, a density testing method for narrow flat concrete-filled steel tube columns comprises the following steps: Step 1: Fix the test column as a whole on the base and fix the separator on the inner wall of the narrow flat steel tube; Step 2: Use a pump truck to pour concrete into the casting cavity of the narrow flat steel pipe. Stop pouring when the concrete is flush with the top of the narrow flat steel pipe, and perform a 28-day curing. Step 3: Use ultrasonic testing equipment to test the concrete in the test column after curing and record the data; Step 4: Peel off the narrow flat steel tube outside the concrete body, visually inspect the concrete density and compare it with the ultrasonic test results to determine the accuracy of the test.

[0025] By employing the above-mentioned technical solution, this testing method can effectively simulate the pouring process of narrow, flat, concrete-filled steel tube columns under actual construction conditions, ensuring that the test results have high reference value. Furthermore, by comparing ultrasonic testing results with visual inspection results, the accuracy of ultrasonic testing can be verified, providing a reliable basis for optimizing testing technology and improving construction quality. Furthermore, this method can help identify potential sources of error during the testing process, further enhancing the reliability of density testing for narrow, flat, concrete-filled steel tube columns.

[0026] In summary, this application has the following beneficial technical effects: 1. A test column is provided that matches the internal cavity of an actual construction steel pipe column, and uses narrow flat steel tubes and separators to accurately simulate the concrete pouring chamber structure in a real construction environment. This structure can ensure that the test conditions are highly consistent with the actual construction conditions, thereby improving the reliability of the test results. During the test, after pouring concrete into the pouring cavity and waiting for it to solidify, ultrasonic testing equipment is first used to perform non-destructive testing on the density of the concrete and record relevant data. Subsequently, the concrete is visually inspected by peeling off the narrow flat steel tube to intuitively judge the actual density of the concrete, and the visual inspection results are compared and analyzed with the ultrasonic test results to verify the accuracy of the ultrasonic test. This method not only avoids destructive testing of actual construction columns, but also significantly improves detection efficiency, provides a more reliable basis for subsequent construction, and helps to optimize the construction process and quality control process of narrow flat steel tube concrete columns; 2. The design of multiple strip-shaped telescopic plates spliced ​​side by side and retractable effectively solves the problems brought about by the integrated structure of traditional vertical partitions. Specifically, traditional vertical partitions will be permanently embedded in the concrete after solidification, resulting in the concrete density test results in the connecting holes on them being easily affected by the structure and position and inaccurate, and it is difficult to peel off the vertical partitions and concrete for visual inspection. In this solution, the splicing and retractable characteristics of the strip-shaped telescopic plates enable the partitions to be smoothly separated from the concrete. During the separation process, the casting surfaces on both sides of the strip-shaped telescopic plate are first moved closer to each other and retracted, so that one of the casting surfaces is separated from the concrete. Subsequently, the strip-shaped telescopic plate is bent into the formed gap to further separate the other casting surface from the concrete, thereby completing the separation of the strip-shaped telescopic plate from the concrete. In addition, since the partition is spliced ​​by multiple strip-shaped telescopic plates, the separation can be carried out in batches, and only a smaller contact area needs to be separated each time, which significantly reduces the difficulty of separation. This design not only facilitates the subsequent inspection of the concrete quality at the connecting holes, but also improves the accuracy and reliability of the overall inspection results; 3. The structural design of the retractable strip panels allows for convenient assembly and disassembly of the divider. During assembly, first place one retractable strip panel in the slot. By loosening the adjustment bolt, the elastic member forces the first and second strip panels away from each other, pressing against the inner walls of the slot, ensuring the panels are securely installed within the slot. Subsequently, the remaining retractable strip panels are adjusted in thickness and sequentially spliced ​​side by side. Two connecting rods are inserted through the ends of the multiple retractable strip panels, achieving precise alignment along the splicing direction to form a complete divider, effectively simulating the vertical partition structure used in actual construction. During disassembly, the first strip plate or the second strip plate is brought closer to each other by tightening the adjusting bolt, thereby forming a certain gap between one side of the strip telescopic plate and the concrete, providing a certain amount of movement space for the subsequent peeling off of the other side of the strip telescopic plate from the concrete. Then, the strip telescopic plate is bent toward one side of the gap, so that the other side of the strip telescopic plate is also peeled off from the concrete, thus completing the rapid separation of the strip telescopic plate as a whole from the concrete, thereby improving the efficiency and convenience of the test operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0028] Figure 2 Mainly displays the test column and template assembly in Example 1 of this application.

[0029] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0030] Figure 4 yes Figure 3 A partial enlarged view of part A.

[0031] Figure 5 Mainly displays the test column in Example 2 of this application.

[0032] Explanation of the accompanying reference numerals: 1. Base; 2. Test column; 21. Narrow flat steel pipe; 210. Casting cavity; 211. Wide-edge steel plate; 2110. Snap-in groove; 212. Narrow-edge steel plate; 22. Partition; 220. Connecting hole; 221. Integral partition; 222. Strip telescopic plate; 2221. First strip plate; 2222. Second strip plate; 2223. Elastic member; 2224. Adjusting bolt; 223. Connecting rod; 3. Operating platform; 4. Formwork assembly; 40. Contoured cavity; 41. Wooden formwork; 42. Wooden square; 43. Fastener. DETAILED DESCRIPTION

[0033] The following combination Figure 1-Figure 5 This application is described in further detail.

[0034] The embodiments of the present application disclose a process test structure and a detection test method for a narrow flat steel tube concrete column.

[0035] Example 1 Reference Figure 1 and Figure 2 In this embodiment, the test structure includes a base 1, a test column 2, an operating platform 3, and a formwork system. Specifically, the base 1 can be a structure such as a foundation, pile foundation, or floor slab at the construction site. The test column 2 is fixedly mounted on the base 1, and the internal cavity of the test column 2 matches the internal cavity of the steel pipe column in actual construction. The test column 2 includes a narrow flat steel pipe 21 and a plurality of partitions 22. A pouring cavity 210 for filling concrete is formed inside the narrow flat steel pipe 21; in this embodiment, there are two partitions 22, and the two partitions 22 are vertically arranged in the pouring cavity 210 to simulate the vertical partitions in the steel pipe column in actual construction, so as to divide the pouring cavity 210 into multiple chambers. The partition 22 is provided with a connecting hole 220 connecting the two sides of the partition 22.

[0036] Specifically, the narrow flat steel tube 21 is formed by cutting from actual steel pipes used in construction and is vertically fixed to the base 1. The partition 22 includes an integral partition 221. The integral partition 221 is made of the same steel as the narrow flat steel tube 21, has excellent strength and durability, and can effectively simulate the partition structure under actual construction conditions. The two sides of the integral partition 221 are welded and fixed to the inner sidewall of the wide side of the narrow flat steel tube 21, which is used to divide the casting cavity 210 into multiple chambers. The connecting hole 220 directly starts on the integral partition 221 and passes through the two sides of the integral partition 221 that are in contact with the concrete.

[0037] The operating platform 3 can be a disc-type operating platform 3. The operating platform 3 is fixedly arranged on the outside of the test column 2 to provide a stable support for the test column 2 to prevent it from tilting or collapsing.

[0038] In this way, the structure can accurately simulate the structure of the narrow flat steel tube 21 concrete column casting under the real construction environment, ensuring that the test conditions are highly consistent with the actual construction conditions. During the test, concrete is poured into the casting cavity 210, and the casting is stopped when the concrete fills the casting cavity 210. After the concrete solidifies, the density of the concrete is first non-destructively tested using ultrasonic detection equipment, and the relevant data is recorded. Subsequently, the narrow flat steel tube 21 is cut by a cutting machine, and the narrow flat steel tube 21 is peeled off to perform a visual inspection of the concrete, and the actual density and surface defects of the concrete are intuitively judged. The visual inspection results are compared and analyzed with the ultrasonic inspection results to verify the accuracy of the ultrasonic inspection. This method not only avoids destructive inspection of the steel tube concrete columns in actual construction, but also significantly improves the inspection efficiency, provides a more reliable basis for subsequent construction, and helps to optimize the construction process and quality control process of the narrow flat steel tube 21 concrete columns.

[0039] Reference Figure 1 and Figure 2 In this embodiment, the height of the test column 2 is less than the height of the steel pipe column in actual construction. The height of the steel pipe column in actual construction is 9 meters, and the height of the test column 2 is 1 meter. The formwork system includes a wooden formwork 41, wooden squares 42, and fasteners 43. The wooden formwork 41 can be made of multi-layer plywood or bamboo plywood, which has good water resistance and wear resistance; the wooden squares 42 can be made of high-quality wood or composite materials to ensure the strength and stability of the structure. The wooden formwork 41 is provided in multiple pieces. The multiple wooden formworks 41 are wrapped around the outside of the narrow flat steel pipe 21 along the height direction of the narrow flat steel pipe 21 to form a contoured cavity 40 that is connected to the casting cavity 210 and matches the shape. The total height of the contoured cavity 40 and the casting cavity 210 is consistent with the height of the steel pipe column in actual construction to simulate the flow path of high-throw concrete pouring. There are also multiple wooden squares 42, which are in contact with the outside of the wooden formwork 41 and are used to cooperate with the fasteners 43 to lock the wooden formwork 41 and fix it on the operating platform 3. The fastener 43 may be a tension screw or an oblique support.

[0040] In this way, the usage of concrete and narrow flat steel pipe 21 can be significantly reduced, thereby effectively reducing the test cost; at the same time, the shortened height of the test column 2 can also simplify the test operation process and improve the test efficiency.

[0041] The implementation principle of Example 1 is as follows: by designing a narrow flat steel tube 21 concrete column process test structure, the narrow flat steel tube 21 concrete column pouring process under actual construction conditions is simulated to verify the density of the narrow flat steel tube 21 concrete column actually constructed as a representative, thereby avoiding destructive testing of the steel tube concrete column actually constructed and improving the detection efficiency. Specifically, before the test, 1 meter of the steel pipe used for actual construction is cut to form the narrow flat steel tube 21 of the test column 2, and an integral partition 221 is welded and installed in the narrow flat steel tube 21 to form a test column 2 that simulates the steel tube column structure of actual construction. Then, a template system with the same height as the actual construction steel tube column is set on the periphery of the narrow flat steel tube 21 to simulate the actual flow path of high-throw concrete pouring. Subsequently, by pouring concrete into the narrow flat steel tube 21 and waiting for it to solidify, the density of the concrete is non-destructively tested using ultrasonic detection equipment, and relevant data is recorded. Finally, the narrow flat steel pipe 21 is cut by a cutting machine, and the narrow flat steel pipe 21 is peeled off to conduct a visual inspection of the concrete, so as to intuitively judge the actual density and surface defects of the concrete, and compare and analyze the visual inspection results with the ultrasonic inspection results to verify the accuracy of the ultrasonic inspection.

[0042] Example 2 The difference between this embodiment 2 and embodiment 1 is that the structural composition of the narrow flat steel tube 21 and the structural group of the separator 22 are different.

[0043] Reference Figure 3 and Figure 4 In this embodiment, the narrow flat steel tube 21 includes two relatively parallel wide steel plates 211 and two relatively parallel narrow steel plates 212. The two wide steel plates 211 and the two narrow steel plates 212 are alternately and removably connected to correspond to the two long sides and the short sides of the narrow flat steel tube 21, respectively, to form a casting cavity 210 therebetween. For example, the wide steel plates 211 and the narrow steel plates 212 can be connected by bolts or snaps, facilitating removal and replacement.

[0044] In this way, the narrow flat steel pipe 21 is designed as a detachable structure consisting of a wide-edge steel plate 211 and a narrow-edge steel plate 212. It can not only flexibly adjust the size and shape of the casting cavity 210 by splicing to meet the needs under different test conditions, but also facilitate the rapid separation of the narrow flat steel pipe 21 and the concrete inside it after the test is completed, providing convenient conditions for intuitively checking the density of the concrete, and preventing the risk of damaging the concrete body when directly cutting the narrow flat steel pipe 21 with a cutting machine in the traditional way, further improving the accuracy and reliability of the test results.

[0045] Reference Figure 4 and Figure 5In this embodiment, the separator 22 includes a plurality of strip-shaped telescopic plates 222 and two serial rods 223. The strip-shaped telescopic plates 222 are long and can be telescoped in a direction perpendicular to their own length and the splicing direction. The plurality of strip-shaped telescopic plates 222 are arranged vertically side by side and are sealed and abutted against each other to form an integral structure. The connecting hole 220 is formed between the abutting surfaces of two of the plurality of spliced ​​strip-shaped telescopic plates 222 that are sealed and abutted against each other. The abutting surfaces of the two strip-shaped telescopic plates 222 each form half the shape of the connecting hole 220, and the completed connecting hole 220 is formed after abutting against each other.

[0046] The connecting rods 223 can be bolts. The two connecting rods 223 pass through the head and tail ends of the multiple strip telescopic plates 222 along the length direction perpendicular to the strip telescopic plates 222, so as to make the multiple strip telescopic plates 222 in the same plane and maintain the same height along the splicing direction.

[0047] This solves the problem of traditional vertical partitions becoming embedded in the concrete after solidification, making it difficult to separate the vertical partitions and concrete to visually inspect the concrete density within the connecting hole 220. Specifically, by utilizing the splicing and telescopic properties of the strip-shaped telescopic plates 222, during the process of separating the strip-shaped telescopic plates 222 from the concrete, the casting surfaces on both sides of the strip-shaped telescopic plates 222 are first brought together and retracted, so that one of the casting surfaces is separated from the concrete. The strip-shaped telescopic plates 222 are then bent toward one side of the formed gap to separate the other casting surface from the concrete, thus completing the separation of the strip-shaped telescopic plates 222 from the concrete. Furthermore, only a small area in contact with the concrete needs to be separated each time, reducing the difficulty of separation.

[0048] Reference Figure 4 and Figure 5 In this embodiment, the two wide-edge steel plates 211 are each provided with a vertically extending snap-in groove 2110 on one side of the casting cavity 210. After the multiple strip-shaped expansion plates 222 are spliced ​​together, the side of the first strip-shaped expansion plate 222 facing away from the other strip-shaped expansion plates 222 snaps into the snap-in groove 2110 on one of the wide-edge steel plates 211; the side of the trailing strip-shaped expansion plate 222 facing away from the other strip-shaped expansion plates 222 snaps into the snap-in groove 2110 on another wide-edge steel plate 211. In this way, the snap-in groove 2110 provides a precise installation position for the strip-shaped expansion plates 222, allowing them to be quickly positioned and securely fixed to the wide-edge steel plates 211, improving the assembly efficiency of the test structure. It also prevents the entire separator 22 from shifting due to concrete pressure during the concrete pouring process.

[0049] Reference Figure 4 and Figure 5In this embodiment, the strip-shaped telescopic plate 222 includes a first strip plate 2221, a second strip plate 2222, an elastic member 2223, and an adjustment bolt 2224. Both the first strip plate 2221 and the second strip plate 2222 are made of high-strength steel, offering high strength and deformation resistance. The first strip plate 2221 and the second strip plate 2222 are arranged parallel to each other. The elastic member 2223 is disposed between the first strip plate 2221 and the second strip plate 2222, with one end connected to the side of the first strip plate 2221 closest to the second strip plate 2222 and the other end connected to the side of the second strip plate 2222 closest to the first strip plate 2221, thereby keeping the two strip plates away from each other. The top ends of the first strip plate 2221 and the second strip plate 2222 protrude from the top end of the narrow flat steel tube 21, and the adjusting bolt 2224 is passed through the first strip plate 2221 and the second strip plate 2222 on one end protruding from the narrow flat steel tube 21 along the direction in which the first strip plate 2221 and the second strip plate 2222 approach or move away from each other; tightening the adjusting bolt 2224 can make the first strip plate 2221 and the second strip plate 2222 approach each other; loosening the adjusting bolt 2224 can make the first strip plate 2221 and the second strip plate 2222 move away from each other under the action of the elastic member 2223; when the strip telescopic plate 222 is clamped in the clamping groove 2110, the two sides of the first strip plate 2221 and the second strip plate 2222 facing away from each other respectively abut the two inner side walls of the clamping groove 2110.

[0050] Thus, during the assembly of the partition 22, one first places a strip-shaped telescopic plate 222 in the engaging groove 2110 and loosens the adjusting bolt 2224. The elastic member 2223 causes the opposite sides of the first strip-shaped plate 2221 and the second strip-shaped plate 2222 to press against the inner sidewalls of the engaging groove 2110, securing the strip-shaped telescopic plate 222 in the engaging groove 2110. Subsequently, the thickness of the remaining strip-shaped telescopic plates 222 is adjusted and they are sequentially spliced ​​side by side. The two connecting rods 223 are respectively passed through the head and tail ends of the plurality of strip-shaped telescopic plates 222, achieving precise alignment of the plurality of strip-shaped telescopic plates 222 along the splicing direction, thus forming a complete partition 22, effectively simulating the vertical partition structure in actual construction. During disassembly, the first strip plate 2221 and the second strip plate 2222 are brought closer together by tightening the adjusting bolts 2224, thereby separating the first strip plate 2221 or the second strip plate 2222 from the concrete, thereby forming a certain gap between one side of the strip-shaped expansion plate 222 and the concrete. The strip-shaped expansion plate 222 is then bent toward the gap, so that the other side of the strip-shaped expansion plate 222 is also separated from the concrete, thereby completing the rapid separation of the entire strip-shaped expansion plate 222 from the concrete. It should be noted that when tightening the adjusting bolts 2224 to bring the first strip plate 2221 and the second strip plate 2222 closer together, if a gap is created between the first strip plate 2221 or the second strip plate 2222 and the concrete but is not completely separated from the concrete, the separation can be facilitated by inserting a hard rod into the gap or spraying a release agent.

[0051] Preferably, when the two opposing sides of the first strip plate 2221 and the second strip plate 2222 respectively abut the two inner sidewalls of the engaging groove 2110, the two sidewalls of the connecting rod 223 respectively abut the two adjacent sides of the first strip plate 2221 and the second strip plate 2222. In this way, the width of the connecting rod 223 ensures that the multiple strip telescopic plates 222 remain precisely aligned during the splicing process.

[0052] The implementation principle of Example 2 is as follows: by designing the narrow flat steel tube 21 as a detachable structure consisting of a wide-edge steel plate 211 and a narrow-edge steel plate 212, it is easy to quickly separate the narrow flat steel tube 21 from the concrete inside after the test is completed, thereby preventing the risk of damaging the concrete body when the narrow flat steel tube 21 is directly cut by a cutting machine, and improving the accuracy and reliability of the test results. By designing the partition 22 as a plurality of strip-shaped expansion plates 222 spliced ​​together, the problem that the traditional vertical partition will be embedded in the concrete after solidification, making it difficult to peel off the vertical partition and concrete to visually inspect the concrete density in the connecting hole 220 is solved; specifically, in the process of separating the strip expansion plates 222 and the concrete, the casting surfaces on both sides of the strip expansion plates 222 are first brought closer to each other and retracted, so that one of the casting surfaces is separated from the concrete. Then, the strip expansion plates 222 are bent toward the side of the formed gap to separate the other casting surface from the concrete, and the strip expansion plates 222 are separated from the concrete. Moreover, during separation, only a smaller area in contact with the concrete needs to be separated each time, which reduces the difficulty of separation.

[0053] Example 3 This embodiment 3 also provides a method for testing the density of a narrow flat steel tube 21 concrete column of a process test structure for a narrow flat steel tube 21 concrete column as described in the above embodiments 1 and 2, comprising the following steps: Step 1: Fix the test column 2 as a whole on the base 1 and fix the separator 22 on the inner wall of the narrow flat steel tube 21. When fixing, ensure that the horizontal and vertical positions of the test column 2 meet the requirements to avoid deviations in the test results due to installation errors.

[0054] Step 2: Use a pump truck to pour concrete into the casting cavity 210 of the narrow flat steel pipe 21. Stop pouring when the concrete is flush with the top of the narrow flat steel pipe 21. Then, perform a 28-day curing. During the curing process, maintain appropriate temperature and humidity to ensure that the concrete reaches the designed strength.

[0055] Step 3: Use ultrasonic testing equipment to test the concrete in the test column 2 after curing and record the data. When testing, appropriate probes and parameter settings should be selected to ensure the accuracy and reliability of the data.

[0056] Step 4: Peel off the narrow flat steel tube 21 from the exterior of the concrete body, visually inspect the concrete density, and compare the ultrasonic test results to determine the accuracy of the test. During the visual inspection, carefully observe the concrete surface for defects such as cavities and cracks. Comparing the ultrasonic test results can verify the effectiveness of the test method.

[0057] The implementation principle of Example 3 is as follows: by designing a test method for detecting the density of narrow flat steel tube 21 concrete columns, the pouring process of narrow flat steel tube 21 concrete columns under the actual construction environment is effectively simulated to ensure that the test results have a high reference value. At the same time, by comparing the ultrasonic detection results with the visual inspection results, the accuracy of the ultrasonic detection can be verified, thereby providing a reliable basis for optimizing the detection technology and improving the construction quality. In addition, this method can also help identify possible sources of error in the detection process, further improving the reliability of the density detection of narrow flat steel tube 21 concrete columns.

[0058] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A narrow flat steel tube concrete column process test structure, characterized in that: include: Base (1); A test column (2) is fixed on the base (1), and the internal cavity of the test column (2) matches the internal cavity of the steel pipe column in actual construction; the test column (2) comprises a narrow flat steel pipe (21) and a plurality of separators (22); a casting cavity (210) for filling concrete is formed inside the narrow flat steel pipe (21); a plurality of separators (22) are vertically arranged in the casting cavity (210) to simulate the vertical partitions in the steel pipe column in actual construction to divide the casting cavity (210) into a plurality of chambers, and a connecting hole (220) is provided on the separator (22) to connect the two sides of the separator (22); An operating platform (3) is arranged outside the test column (2) and is used to support the test column (2).

2. A narrow flat steel tube concrete column process test structure according to claim 1, characterized in that: The test column (2) has a height smaller than the height of the steel pipe column in actual construction; and further comprises a template assembly (4), wherein the template assembly (4) is wrapped around the outside of the narrow flat steel pipe (21) and is used to form a profiled cavity (40) that is connected to the pouring cavity (210) and matches the shape; the sum of the heights of the profiled cavity (40) and the pouring cavity (210) is consistent with the height of the steel pipe column in actual construction, so as to simulate the flow path of high-throw concrete pouring.

3. A narrow flat steel tube concrete column process test structure according to claim 2, characterized in that: The template assembly (4) comprises a wooden template (41), a wooden square (42) and a fastener (43); the wooden template (41) is used to splice to form a contoured cavity (40), and the wooden square (42) abuts against the outside of the wooden template (41) and cooperates with the fastener (43) to lock the wooden template (41) and fix the wooden template (41) on the operating platform (3).

4. A narrow flat steel tube concrete column process test structure according to claim 1, characterized in that: The narrow flat steel pipe (21) comprises a structure formed by cutting a steel pipe used in actual construction; the partition (22) comprises an integral partition (221), and both side edges of the integral partition (221) are respectively connected to the two inner side walls of the narrow flat steel pipe (21).

5. A narrow flat steel tube concrete column process test structure according to claim 1, characterized in that: The narrow flat steel tube (21) comprises at least two oppositely arranged wide-side steel plates (211) and at least two oppositely arranged narrow-side steel plates (212); the two wide-side steel plates (211) and the two narrow-side steel plates (212) are alternately detachably connected to form a casting cavity (210) therebetween.

6. A narrow flat steel tube concrete column process test structure according to claim 5, characterized in that: The partition (22) includes a plurality of strip-shaped telescopic plates (222) and at least two connecting rods (223). The plurality of strip-shaped telescopic plates (222) are arranged vertically side by side and sealed against each other to form an integral structure. The strip-shaped telescopic plates (222) can be telescoped along a direction perpendicular to their own length and a splicing direction. The connecting hole (220) is formed between the abutting surfaces of two strip-shaped telescopic plates (222) among the plurality of strip-shaped telescopic plates (222). The two connecting rods (223) respectively penetrate the head and tail ends of the plurality of strip-shaped telescopic plates (222) along a direction perpendicular to the length of the strip-shaped telescopic plates (222) to keep the plurality of strip-shaped telescopic plates (222) aligned along the splicing direction.

7. A narrow flat steel tube concrete column process test structure according to claim 6, characterized in that: A clamping groove (2110) is provided on one side of the two wide-edge steel plates (211) close to the casting cavity (210) in the vertical direction; a side of the strip-shaped telescopic plate (222) at the head end of the plurality of strip-shaped telescopic plates (222) facing away from the other strip-shaped telescopic plates (222), and a side of the strip-shaped telescopic plate (222) at the tail end of the plurality of strip-shaped telescopic plates (222) facing away from the other strip-shaped telescopic plates (222) are respectively clamped in the two clamping grooves (2110).

8. A narrow flat steel tube concrete column process test structure according to claim 7, characterized in that: The strip-shaped telescopic plate (222) comprises a first strip plate (2221), a second strip plate (2222), an elastic member (2223) and an adjusting bolt (2224). The first strip plate (2221) and the second strip plate (2222) are arranged relatively parallel to each other. The elastic member (2223) is arranged between the first strip plate (2221) and the second strip plate (2222) to keep the two away from each other. The adjusting bolt (2224) is passed through the first strip plate (2221) and the second strip plate (2222). ; Tightening the adjusting bolt (2224) can bring the first strip plate (2221) and the second strip plate (2222) closer to each other; loosening the adjusting bolt (2224) can cause the first strip plate (2221) and the second strip plate (2222) to move away from each other under the action of the elastic member (2223); when the strip telescopic plate (222) is engaged in the engaging groove (2110), the two sides of the first strip plate (2221) and the second strip plate (2222) facing away from each other respectively abut against the two inner side walls of the engaging groove (2110).

9. A narrow flat steel tube concrete column process test structure according to claim 8, characterized in that: When the two opposite sides of the first strip plate (2221) and the second strip plate (2222) respectively abut against the two inner side walls of the clamping groove (2110), the two side walls of the connecting rod (223) respectively abut against the two adjacent sides of the first strip plate (2221) and the second strip plate (2222).

10. A method for testing the density of narrow flat steel tube concrete columns using a narrow flat steel tube concrete column process test structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Fix the test column (2) as a whole on the base (1), and fix the separator (22) on the inner wall of the narrow flat steel tube (21); Step 2: Use a pump truck to pour concrete into the pouring cavity (210) of the narrow flat steel pipe (21), stop pouring after the concrete is flush with the top of the narrow flat steel pipe (21), and perform a 28-day curing. Step 3: Use ultrasonic testing equipment to test the concrete body in the test column (2) after curing and record the data; Step 4: Peel off the narrow flat steel tube (21) outside the concrete body, visually inspect the concrete density and compare the ultrasonic test results to determine the accuracy of the test.

Images