A diaphragm wall pouring construction concrete surface depth measuring system and detection method

Abstract

This application discloses a system and method for measuring the depth of concrete surface during the construction of a seepage-proof wall, relating to the field of seepage-proof wall construction technology. The system includes a signal feedback line, a main connecting wire, and a calibration resistance line. The first end of the signal feedback line is electrically connected to the measuring contact of the display structure; the first end of the main connecting wire is electrically connected to the positive terminal of the display structure; and the first end of the calibration resistance line is electrically connected to the calibration contact of the display structure. The second ends of the signal feedback line, the main connecting wire, and the calibration resistance line are electrically connected, and all three are connected to a counterweight structure. The signal feedback line has multiple equally spaced depth sensing resistors. The display structure is used to display the depth of the concrete surface in the pouring trench in real time. The number of burst resistors is equal to the number of depth sensing resistors, and the burst resistors and depth sensing resistors are connected in parallel. The burst resistors have a breakable outer shell. This application measures the concrete surface depth by measuring resistance changes, achieving high accuracy, high construction efficiency, and cost savings.

Description

Technical Field

[0001] This application generally relates to the field of anti-seepage wall construction technology, and specifically to a system and method for measuring the depth of concrete surface during anti-seepage wall pouring construction. Background Technology

[0002] During the construction of underground cutoff walls, timely monitoring of the concrete surface rise is crucial for achieving high-quality and efficient construction of cutoff walls or cast-in-place piles. Concrete is introduced through a guide pipe to the bottom of the trench filled with wall-protecting grout. As the pouring volume increases, the concrete surface gradually rises, making accurate monitoring of its depth essential.

[0003] Currently, two main techniques are used to measure the depth of concrete surfaces. The first is the manual plumb bob measurement method, such as... Figure 1 As shown, technicians insert a plumb bob and a rope into the slot for detection. When the plumb bob is lifted by the concrete surface, the length of the rope is read to obtain the depth of the concrete surface. The second method is to install a detection device on the guide pipe for monitoring, which senses the position of the concrete surface and transmits signals.

[0004] However, both existing measurement methods have significant drawbacks. The manual plumb bob measurement method is greatly affected by the operator's skill and feel, potentially leading to substantial errors in concrete surface depth measurements taken at the same time and location, and even misidentifying viscous mud as concrete. Furthermore, the complex construction site environment necessitates regular measurements by specialized personnel using dedicated equipment, which is time-consuming and labor-intensive. Additionally, the method of deploying detection devices on the guide pipe is extremely cumbersome due to the need to run signal cables to the bottom surface, making the setting and retrieval of the devices extremely complicated and impacting construction efficiency. Therefore, we provide a concrete surface depth measurement system and detection method for anti-seepage wall pouring construction to solve the aforementioned problems. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the existing technology, it is desirable to provide a concrete surface depth measurement system and detection method for seepage prevention wall pouring construction that improves the accuracy and reliability of concrete surface depth measurement.

[0006] In a first aspect, this application provides a system for measuring the depth of concrete surface during the pouring of a seepage-proof wall, comprising: The system includes a signal feedback line, a main connecting wire, and a calibration resistor line. The first end of the signal feedback line is electrically connected to the measuring contact of the display structure; the first end of the main connecting wire is electrically connected to the positive terminal of the display structure; and the first end of the calibration resistor line is electrically connected to the calibration contact of the display structure. The second ends of the signal feedback line, the main connecting wire, and the calibration resistor line are electrically connected, and all three are connected to a counterweight structure. The signal feedback line has multiple equally spaced depth sensing resistors. The display structure is used to display the depth of the concrete surface in the pouring trench in real time. The number of the bursting resistors is equal to the number of the depth sensing resistors, and the bursting resistors and the depth sensing resistors are connected in parallel one by one; the bursting resistor has a breakable outer shell; The measuring system is lowered into the pouring slot, and concrete can be poured after the counterweight structure touches the bottom of the slot. During pouring, the concrete surface rises, and the concrete squeezes the outer shell of the bursting resistor one by one from the end near the counterweight structure to the end away from the counterweight structure, causing the bursting resistor to form an open circuit, and the resistance value of the corresponding depth sensing resistor increases. The display structure determines and displays the real-time concrete surface depth based on the number of bursting resistors that form an open circuit, the spacing of the depth sensing resistors, the resistance value of the calibration resistance line, and the resistance value between the positive electrode and the calibration contact.

[0007] According to the technical solution provided in the embodiments of this application, the outer shell is hollow inside and has an opening; The bursting resistor also includes: A sealing cap is connected to the opening edge of the outer shell, forming a closed cavity between the sealing cap and the outer shell, and the closed cavity is filled with a filling liquid; A thin-film resistor is disposed on the surface of the housing; the thin-film resistor is connected to two pins, which are used for electrical connection with the signal feedback line.

[0008] According to the technical solution provided in the embodiments of this application, the material of the outer shell is glass or ceramic.

[0009] According to the technical solution provided in the embodiments of this application, the display structure includes: The system includes a display module, a calculation module, and a processing module connected by communication. The calculation module has the positive electrode, the measuring contact, and the calibration contact. The calculation module is used to count the number of burst resistors that form an open circuit. The processing module is used to determine the real-time concrete surface depth based on the number of burst resistors that form an open circuit, the spacing of the depth sensing resistors, the resistance value of the calibration resistance line, and the resistance value between the positive electrode and the calibration contact. The display module is used to show the real-time concrete surface depth.

[0010] According to the technical solution provided in the embodiments of this application, the signal feedback line further includes: A feedback cable, on which a plurality of equally spaced depth sensing resistors are arranged.

[0011] According to the technical solution provided in the embodiments of this application, the distance between two adjacent depth sensing resistors is 0.25m, and the size of the bursting resistor is 1.5 times the size of the aggregate in the concrete.

[0012] Secondly, this application provides a method for measuring the depth of concrete surface during the construction of a seepage-proof wall, based on the aforementioned system for measuring the depth of concrete surface during the construction of a seepage-proof wall. The method includes the following steps: Weld the second ends of the signal feedback line, the main connecting wire, and the calibration resistor line together, and then connect them to the counterweight structure. Place the connected counterweight structure into the slot to be poured, so that the signal feedback line, main connecting wire and calibration resistance line extend vertically to the bottom of the slot. When the counterweight structure touches the bottom of the slot, leave the target length of the signal feedback line, main connecting wire and calibration resistance line at the top of the slot and fix them. The measurement contacts, positive terminal, and calibration contacts on the display structure will be connected to the signal feedback line, main connection wire, and calibration resistor line, respectively. During concrete pouring, as the concrete surface rises, the concrete compresses the bursting resistors, causing them to break the circuit. The display structure determines and displays the real-time concrete surface depth based on the number of bursting resistors that form the circuit, the spacing of the depth sensing resistors, the resistance value of the calibration resistance wires, and the resistance value between the positive terminal and the calibration contact.

[0013] The technical solution provided in the embodiments of this application further includes the following steps: When the display structure detects that the number of burst resistors forming an open circuit has not changed within a preset time period, an alarm message is issued; the alarm message is used to indicate an abnormal pouring process.

[0014] According to the technical solution provided in the embodiments of this application, the display structure determines and displays the real-time concrete surface depth based on the number of burst resistors forming the circuit break, the spacing of the depth sensing resistors, the resistance value of the calibration resistance wires, and the resistance value between the positive electrode and the calibration contact. Specifically, this includes the following steps: The straight-line distance between the concrete surface and the bottom of the pouring trench is calculated based on the number of blasting resistors that form the circuit break and the spacing of the depth sensing resistors. The laying length of the calibration resistance wire is calculated based on the resistance value of the calibration resistance wire and the resistance value between the positive terminal and the calibration contact. The difference between the laying length of the calibration resistance wire and the straight-line distance between the concrete surface and the bottom of the pouring trench is calculated to obtain the real-time concrete surface depth and display it on the display structure.

[0015] The technical solution provided in the embodiments of this application further includes the following steps: The system monitors the resistance value change caused by the break in the blast resistor in real time. When a change in resistance value is detected and the change meets the false triggering conditions, it is determined that the change in current resistance value has the potential to be falsely triggered. The false triggering conditions are that the change in resistance value caused by the break in the blast resistor exceeds the preset range, or the number of times the resistance value changes due to the break in the blast resistor within a unit time is greater than the preset allowable number. Obtain a historical data collection set of the display structure; the historical data collection set includes at least the resistance value between the positive electrode and the calibration contact point for each collection and the timestamp corresponding to the resistance value. Based on the historical data collection, analyze the continuity and regularity of the resistance value changes; if the regularity of the resistance value changes does not show abrupt changes or abnormal fluctuations that do not conform to the rise of the concrete surface, then determine that the current resistance value change is a false triggering situation, and delete the resistance data corresponding to the current resistance value change in the display structure.

[0016] As can be seen from the above technical solution, this application has at least the following beneficial effects: This application provides a system for measuring the depth of concrete surface during the pouring of a seepage-proof wall, comprising: a signal feedback line, a main connecting wire, and a calibration resistance line used in conjunction; the first end of the signal feedback line is electrically connected to the measuring contact of a display structure; the first end of the main connecting wire is electrically connected to the positive terminal of the display structure; and the first end of the calibration resistance line is electrically connected to the calibration contact of the display structure; the second ends of the signal feedback line, the main connecting wire, and the calibration resistance line are electrically connected, and the second ends of all three are connected to a counterweight structure; the signal feedback line has multiple depth sensing resistors arranged at equal intervals; the display structure is used to display the depth of the concrete surface in the pouring trench in real time; the number of bursting resistors is related to the depth... The number of depth sensing resistors is equal, and the bursting resistors and depth sensing resistors are connected in parallel one by one; the bursting resistor has a breakable shell; the measuring system is lowered into the pouring trench, and concrete can be poured after the counterweight structure touches the bottom of the pouring trench; during pouring, the concrete surface rises, and the concrete squeezes the shell of the bursting resistor one by one from the end closer to the counterweight structure to the end farther away from the counterweight structure, so that the bursting resistor forms an open circuit, and the resistance value of the corresponding depth sensing resistor increases. The display structure determines and displays the real-time concrete surface depth based on the number of bursting resistors that form an open circuit, the spacing of the depth sensing resistors, the resistance value of the calibration resistance line, and the resistance value between the positive terminal and the calibration contact.

[0017] The essential difference between concrete and slurry lies in the fact that concrete contains aggregates (large particles, high-hardness stone), while slurry does not. Based on this principle, this application utilizes a combination of bursting resistors and depth sensing resistors. The bursting resistor has a breakable outer shell. When the measuring system is lowered into the pouring trench and pouring begins, as the concrete surface rises, the aggregates in the concrete gradually compress the outer shell of the bursting resistor from the end closer to the counterweight structure to the end farther away. Due to the hardness and irregular shape of the aggregates, concentrated stress is generated on the outer shell of the bursting resistor, causing it to break and thus creating an open circuit. At this time, the resistance value of the depth sensing resistor connected in parallel increases. The display structure, by recording the number of bursting resistors that create an open circuit, combined with the characteristic of the depth sensing resistors being evenly spaced (known spacing), and the resistance values ​​of the calibration resistance lines and the resistance value between the positive terminal and the calibration contact, can accurately determine the real-time concrete surface depth. This measurement method, starting from the physical properties, accurately identifies concrete and effectively avoids the misjudgment problem caused by the similarity between viscous mud and concrete in traditional manual plumb line measurement, thus greatly improving the accuracy of the measurement results.

[0018] Furthermore, the measurement system designed in this application is lowered into the pouring trench before pouring and can automatically display the concrete surface depth in real time during the pouring process; it eliminates the need for dedicated personnel to use specialized equipment for periodic measurements, reducing manpower and measurement time, and improving construction efficiency. In addition, compared to traditional manual plumb bob measurements requiring dedicated operation and cumbersome cable routing and retrieval for the detection device on the guide pipe, this automated measurement method significantly reduces the labor intensity of construction workers, allowing them to focus on other key construction aspects and optimizing the construction process. Moreover, except for the display structure, all components are disposable and do not require recycling, reducing equipment recycling costs and procedures. Furthermore, the signal feedback lines and other cables can be cut and extended like ordinary cables, facilitating flexible adjustments according to different pouring trench depths, resulting in a high degree of standardization, which is conducive to large-scale production and application, effectively controlling construction costs. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram illustrating the measurement principle of the manual plumb bob method.

[0021] Figure 2 A schematic diagram of the system for measuring the depth of concrete surface during the construction of a seepage-proof wall.

[0022] Figure 3 This is a schematic diagram of the structure of the explosion resistor.

[0023] Figure 4 A structural diagram to show the structure.

[0024] Figure 5 Example diagram of a system for measuring the depth of concrete surface during the construction of a seepage-proof wall.

[0025] Figure 6 This diagram illustrates the measurement principle of a system for measuring the depth of concrete surface during the construction of an anti-seepage wall.

[0026] Figure 7 A flowchart for measuring the depth of concrete surface during the construction of a seepage-proof wall.

[0027] The diagram is labeled as follows: 1. Explosion resistor; 2. Signal feedback line; 3. Display structure; 4. Main connecting wire; 5. Calibration resistor line; 6. Counterweight structure; 11. Housing; 12. Thin film resistor; 13. Pin; 14. Sealing cap; 15. Filling liquid; 21. Feedback cable; 22. Depth sensing resistor; 31. Positive electrode; 32. Measuring contact; 33. Calibration contact; 34. Display module; 35. Calculation module; 36. Processing module. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figure 2 As shown, this application provides a system for measuring the depth of concrete surface during the construction of a seepage-proof wall, comprising: The signal feedback line 2, main connecting wire 4, and calibration resistor line 5 are used in conjunction. The first end of the signal feedback line 2 is electrically connected to the measuring contact 32 of the display structure 3, the first end of the main connecting wire 4 is electrically connected to the positive terminal 31 of the display structure 3, and the first end of the calibration resistor line 5 is electrically connected to the calibration contact 33 of the display structure 3. The second ends of the signal feedback line 2, the second ends of the main connecting wire 4, and the second ends of the calibration resistor line 5 are electrically connected, and the second ends of all three are connected to the counterweight structure 6. The signal feedback line 2 has multiple depth sensing resistors 22 arranged at equal intervals. The display structure 3 is used to display the depth of the concrete surface in the pouring trench in real time. The number of blasting resistors 1 is equal to the number of depth sensing resistors 22, and the blasting resistors 1 and the depth sensing resistors 22 are connected in parallel one by one; the blasting resistor 1 has a breakable outer shell 11. The measuring system is lowered into the pouring trench, and concrete can be poured after the counterweight structure 6 touches the bottom of the pouring trench. During pouring, the concrete surface rises, and the concrete squeezes the outer shell 11 of the bursting resistor 1 one by one from the end near the counterweight structure 6 to the end away from the counterweight structure 6, so that the bursting resistor 1 forms an open circuit, and the resistance value of the corresponding depth sensing resistor 22 increases. The display structure 3 determines and displays the real-time concrete surface depth based on the number of bursting resistors 1 that form an open circuit, the spacing of the depth sensing resistors 22, the resistance value of the calibration resistance line 5, and the resistance value between the positive electrode 31 and the calibration contact 33.

[0031] It should be noted that, as Figure 2 , Figure 5 and Figure 6 As shown, the first end of the signal feedback line 2 is connected to the measuring contact 32 of the display structure 3, used to transmit the resistance value change of the depth sensing resistor 22; the depth sensing resistors 22 are evenly distributed on the signal feedback line 2, and the first end of the main connecting wire 4 is connected to the positive terminal 31 of the display structure 3, used to provide power connection for the system; the first end of the calibration resistor line 5 is connected to the calibration contact 33 of the display structure 3, used to assist in determining parameters such as the total laying length of the system. The second ends of these three cables are electrically connected and all are connected to the counterweight structure 6, forming a complete electrical connection loop. The number of burst resistors 1 is equal to that of the depth sensing resistors 22 and they are connected in parallel one by one.

[0032] The burst resistor 1 has a breakable outer shell 11. When the outer shell 11 is intact, the thin-film resistor 12 is connected to the signal feedback line 2 through the pin 13. At this time, the burst resistor 1 and the depth sensing resistor 22 form a parallel circuit. When concrete aggregate compresses the burst resistor outer shell 11 and causes it to break, the connection between the pin 13 and the signal feedback line 2 is broken, and the branch containing the burst resistor becomes an open circuit. At this time, only the depth sensing resistor 22 remains in the parallel circuit, which significantly increases the total resistance of the signal feedback line 2.

[0033] The counterweight structure 6 and the second end of the three connecting cables, when the measurement system is lowered, use their own weight to make the measurement system fall vertically to the bottom of the pouring trench, ensuring that the system can accurately measure the distance from the bottom of the trench to the concrete surface.

[0034] like Figure 6As shown, before pouring concrete, the measuring system is lowered into the pouring trench, so that the counterweight structure 6 touches the bottom of the trench. At this time, all components of the system are ready. As the concrete is poured, the concrete surface gradually rises. Starting from the end near the counterweight structure 6, the aggregate in the concrete squeezes the outer shell 11 of the bursting resistor 1 one by one. When the outer shell 11 breaks, the bursting resistor 1 forms an open circuit, which increases the resistance value of the depth sensing resistor 22 connected in parallel. This change in resistance value is transmitted to the display structure 3. The display structure 3 performs calculations based on the number of bursting resistors 1 that form an open circuit, the known spacing of the depth sensing resistors 22, the resistance value of the calibration resistance line 5, and the resistance value between the positive terminal 31 and the calibration contact 33. For example, the straight-line distance between the concrete surface and the bottom of the pouring trench is first calculated based on the number of bursting resistors 1 and the spacing of the depth sensing resistors 22. Then, the laying length of the calibration resistance line 5 is calculated based on the relevant resistance value. The difference between the two is the real-time concrete surface depth, which is finally displayed by the display module 34, realizing real-time monitoring of the concrete surface depth. This measurement method, starting from the physical properties, accurately identifies concrete and effectively avoids the misjudgment problem caused by the similarity between viscous mud and concrete in traditional manual plumb line measurement, thus greatly improving the accuracy of the measurement results.

[0035] Here, the concrete surface depth refers to the straight-line distance between the opening of the pouring groove and the concrete surface. Signal feedback line 2, main connecting wire 4, calibration resistance line 5, and display structure 3 can be transported and stored independently. Signal feedback line 2, main connecting wire 4, and calibration resistance line 5 can be simply sealed in plastic film and transported in a tray.

[0036] Furthermore, the outer casing 11 is hollow inside and has an opening; like Figure 3 As shown, the blast resistor 1 also includes: The sealing cover 14 is connected to the opening edge of the outer shell 11, and a closed cavity is formed between the sealing cover 14 and the outer shell 11. The closed cavity is filled with filling liquid 15. Thin film resistor 12 is disposed on the surface of housing 11; thin film resistor 12 is connected to two pins 13, which are used for electrical connection with signal feedback line 2.

[0037] It should be noted that the outer shell 11 is hollow and has an opening, which is used to connect with the sealing cap 14 to form a closed cavity. At the same time, its brittle material (such as glass or ceramic) is easily broken when subjected to the compression of concrete aggregate, thereby changing the electrical state of the burst resistance.

[0038] The sealing cap 14 is connected to the opening edge of the outer shell 11, and the sealing cap 14 and the outer shell 11 together form a closed cavity. The filling liquid 15 inside this closed cavity plays a role in balancing the pressure. When the rupture resistor 1 is in a mud or other liquid environment, the filling liquid 15 can balance the pressure on the inside and outside of the outer shell 11, preventing the outer shell 11 from cracking due to pressure difference. However, when the rupture resistor 1 comes into contact with concrete, the aggregate in the concrete will exert local compressive force on the outer shell 11. This compressive force breaks the pressure state originally balanced by the filling liquid, causing the outer shell 11 to break, thereby triggering a change in the state of the rupture resistor 1.

[0039] The filling liquid 15 fills the sealed cavity, which, in addition to balancing the pressure, also provides some protection and stability for the thin-film resistor 12. Under normal conditions, it ensures the stable operation of the thin-film resistor 12; even if the outer casing 11 breaks, it will not interfere with the electrical performance of the thin-film resistor 12, ensuring accurate transmission of resistance change signals. Here, the type of filling liquid 15 is, for example, silicone oil or glycerin.

[0040] A thin-film resistor 12 is disposed on the surface of the housing 11 and is a key component for realizing the electrical function of the burst resistor 1. The two pins 13 of the thin-film resistor 12 are electrically connected to the signal feedback line 2. When the housing 11 is intact, the thin-film resistor 12 and the depth sensing resistor 22 are connected in parallel, jointly affecting the resistance value in the circuit. Once the housing 11 is crushed by concrete aggregate, the thin-film resistor 12 forms an open circuit, and the resistance value of the depth sensing resistor 22 connected in parallel increases. The signal feedback line 2 transmits this resistance change signal to the display structure 3 for calculating the depth of the concrete surface. Here, the thin-film resistor 12 can be electroplated onto the surface of the housing 11.

[0041] Furthermore, such as Figure 4 As shown, display structure 3 includes: The communication connection includes a display module 34, a calculation module 35, and a processing module 36. The calculation module 35 has a positive electrode 31, a measuring contact 32, and a calibration contact 33. The calculation module 35 is used to count the number of burst resistors 1 that form an open circuit. The processing module 36 is used to determine the real-time concrete surface depth based on the number of burst resistors 1 that form an open circuit, the spacing of the depth sensing resistors 22, the resistance value of the calibration resistance line 5, and the resistance value between the positive electrode 31 and the calibration contact 33. Display module 34 is used to display the real-time concrete surface depth.

[0042] It should be noted that the calculation module 35 has a positive terminal 31, a measuring contact 32, and a calibration contact 33. These contacts are key interfaces for electrical connection with other components in the system. The positive terminal 31 is used to connect to the main connecting wire 4, providing power to the calculation module 35; the measuring contact 32 is connected to the signal feedback line 2, receiving the resistance change signal of the depth sensing resistor 22 to obtain data related to the state of the burst resistor 1; the calibration contact 33 is connected to the calibration resistor line 5, used to measure the resistance value of the calibration resistor line 5, thereby determining information such as the total laying length of the system cables. The calculation module 35 is used to count the number of burst resistors 1 forming an open circuit. Specifically, through the parallel circuit characteristics of the burst resistor 1 and the depth sensing resistor 22, the measuring contact 32 collects the resistance change signal and the calculation module 35 counts it. The processing module 36 is used to determine the real-time concrete surface depth based on the number of burst resistors 1 forming the circuit break, the spacing of the depth sensing resistors 22, the resistance value of the calibration resistance line 5, and the resistance value between the positive electrode 31 and the calibration contact 33. Specifically, it first calculates the straight-line distance between the concrete surface and the bottom of the pouring trench based on the number of burst resistors 1 forming the circuit break and the spacing of the depth sensing resistors 22; then it calculates the laying length of the calibration resistance line 5 based on the resistance value of the calibration resistance line 5 and the resistance value between the positive electrode 31 and the calibration contact 33; finally, it calculates the difference between the two to obtain the real-time concrete surface depth.

[0043] The display module 34 is used to display the real-time concrete surface depth results obtained by the processing module 36. For example, the specific depth value can be directly displayed on a digital screen, or the trend of concrete surface depth changes can be reflected by the different states of indicator lights. In this way, construction personnel can intuitively and conveniently obtain concrete surface depth information, keep abreast of the progress of the anti-seepage wall pouring construction, make corresponding construction decisions, and ensure the smooth progress of construction.

[0044] Furthermore, such as Figure 6 As shown, signal feedback line 2 also includes: Feedback cable 21, on which multiple equally spaced depth sensing resistors 22 are arranged.

[0045] It should be noted that the feedback cable 21 is an important component of the signal feedback line 2, playing a crucial role in signal transmission throughout the measurement system. As a carrier, it connects the depth sensing resistor 22 to other parts of the system (such as the display structure 3), enabling the resistance value change signal generated by the depth sensing resistor 22 due to the change in the state of the burst resistor 1 to be successfully transmitted to the display structure 3 for processing and analysis, thereby realizing the measurement and display of the concrete surface depth.

[0046] Multiple depth sensing resistors 22 are arranged at equal intervals on the feedback cable 21. This equal-interval arrangement is key to achieving accurate measurement of concrete surface depth. During system operation, each depth sensing resistor 22 is connected in parallel with a bursting resistor 1. When aggregate in the concrete compresses the bursting resistor 1, causing its outer shell to break and creating an open circuit, the resistance value of the corresponding depth sensing resistor 22 increases. Due to the equal-interval distribution of the depth sensing resistors 22, the display structure 3 can calculate the height of the concrete surface rise by recording the number of bursting resistors 1 that create an open circuit, combined with the spacing of the depth sensing resistors 22, thus determining the real-time concrete surface depth. For example, if the spacing between two adjacent depth sensing resistors 22 is 0.25m, when three bursting resistors 1 create an open circuit, it can be determined that the concrete surface has risen by 0.25 × 3 = 0.75m.

[0047] The design of the feedback cable 21 and the equally spaced depth sensing resistors 22 in the signal feedback line 2 establishes a stable and efficient signal feedback mechanism, which can accurately transmit the resistance change signal caused by the rise of the concrete surface to the display structure 3. This provides reliable data support for the system to accurately measure the concrete surface depth and is an important foundation for the normal operation of the entire concrete surface depth measurement system for the construction of the anti-seepage wall.

[0048] Furthermore, the spacing between two adjacent depth sensing resistors 22 is 0.25m, and the size of the bursting resistor 1 is 1.5 times the size of the aggregate in the concrete.

[0049] It should be noted that the spacing between two adjacent depth sensing resistors 22 is set to 0.25m. This spacing was determined after considering multiple factors. From the perspective of measurement accuracy, the smaller the spacing, the denser the resistance change signal acquired by the display structure 3 as the bursting resistors 1 are successively squeezed and broken during the concrete surface rise, resulting in higher measurement accuracy of the concrete surface depth, similar to a higher resolution LCD display producing a clearer image. However, too small a spacing increases system cost and wiring difficulty. In the construction of the anti-seepage wall, according to industry standards and actual construction experience, the anti-seepage wall construction method has requirements for the height of the concrete surface undulation (the height difference of the concrete surface should be controlled within 0.5 meters). A spacing of 0.25m can meet the measurement accuracy requirements, ensuring measurement accuracy while also considering system cost and construction convenience. When the concrete surface rises, the resistance value of the corresponding depth sensing resistor 22 changes with each bursting resistor 1. By recording the number of changes in resistance and multiplying it by the 0.25m spacing, the height of the concrete surface rise can be accurately calculated, thus determining the real-time concrete surface depth.

[0050] The size of the bursting resistor 1 is set to 1.5 times the size of the aggregate in the concrete. This is to ensure that the bursting resistor 1 can work reliably in the concrete environment. The aggregate in the concrete is irregular in shape and varies in size. If the size of the bursting resistor 1 is too small, it may not be able to effectively contact the aggregate, resulting in it not being crushed in time during the rise of the concrete surface, causing measurement errors. If the size is too large, it will not only increase costs, but may also affect its stability in slurry or liquid, as well as its uniformity of distribution in the concrete. Setting it to 1.5 times the size of the aggregate ensures that the bursting resistor 1 can contact the aggregate as much as possible in the concrete and be crushed when compressed by the aggregate, thus realizing its measurement function. For example, in the concrete, when the bursting resistor 1 is lowered to the bottom of the pouring trench with the measuring system, as the concrete rises, the aggregate in the concrete can smoothly compress the bursting resistor 1, causing its outer shell 11 to break and the thin film resistor 12 to open the circuit. This changes the resistance value of the depth sensing resistor 22 connected in parallel, allowing the system to accurately sense the positional changes of the concrete surface. Here, the size of the bursting resistor 1 and the size of the aggregate refer to the volume of the components.

[0051] like Figure 7 As shown, this application provides a method for measuring the depth of concrete surface during the construction of a seepage-proof wall, based on the aforementioned system for measuring the depth of concrete surface during seepage-proof wall construction. The method includes the following steps: S100. Weld the second ends of the signal feedback line 2, the main connecting wire 4 and the calibration resistor line 5 together, and then connect them to the counterweight structure 6.

[0052] S200. Place the connected counterweight structure 6 into the slot to be poured, so that the signal feedback line 2, the main connecting wire 4 and the calibration resistance line 5 extend vertically to the bottom of the slot to be poured. When the counterweight structure 6 touches the bottom of the slot to be poured, reserve the target length of the signal feedback line 2, the main connecting wire 4 and the calibration resistance line 5 at the top of the slot and fix them.

[0053] S300, the measurement contact 32, positive terminal 31, and calibration contact 33 on the display structure 3 are respectively connected to the signal feedback line 2, the main connecting wire 4, and the calibration resistor line 5.

[0054] S400. During concrete pouring, as the concrete surface rises, the concrete compresses the bursting resistor 1, causing it to form an open circuit. The display structure 3 determines and displays the real-time concrete surface depth based on the number of bursting resistors 1 forming an open circuit, the spacing of the depth sensing resistors 22, the resistance value of the calibration resistance line 5, and the resistance value between the positive electrode 31 and the calibration contact 33.

[0055] It should be noted that the second ends of the signal feedback line 2, the main connecting wire 4, and the calibration resistor line 5 are welded together to ensure smooth current transmission between these lines and to ensure the coordinated operation of all components. After welding, it is then connected to the counterweight structure 6. The counterweight structure 6 provides sufficient gravity for the entire measurement system, allowing it to fall vertically when placed into the casting groove, thus ensuring measurement accuracy.

[0056] The connected counterweight structure 6 is placed into the pouring groove, allowing the signal feedback line 2, main connecting wire 4, and calibration resistance line 5 to extend vertically to the bottom of the groove along with the counterweight structure 6. When the counterweight structure 6 touches the bottom of the groove, it indicates that the measurement system has reached the designated position. At this point, a target length of signal feedback line 2, main connecting wire 4, and calibration resistance line 5 is reserved at the top of the groove and fixed. This reserved length facilitates subsequent connection to the display structure 3 and prevents damage to the cables due to accidental pulling during construction. Fixing the cables ensures the system's position is stable during measurement, preventing cable movement from affecting the measurement results. The target length can be set according to actual needs.

[0057] The measuring contact 32, positive terminal 31, and calibration contact 33 on the display structure 3 are connected to the signal feedback line 2, the main connecting wire 4, and the calibration resistance line 5, respectively, enabling the display structure 3 to acquire relevant signals and data from the signal feedback line 2, the main connecting wire 4, and the calibration resistance line 5. The measuring contact 32 is connected to the signal feedback line 2 to receive the resistance change signal from the depth sensing resistor 22; the positive terminal 31 is connected to the main connecting wire 4 to provide power to the display structure 3; and the calibration contact 33 is connected to the calibration resistance line 5 to acquire the resistance value information of the calibration resistance line 5. This data is crucial for subsequent calculations of the concrete surface depth.

[0058] During concrete pouring, as the concrete surface rises, the aggregates in the concrete gradually compress the bursting resistors 1. Because the bursting resistors 1 have a breakable outer shell 11, they form an open circuit when compressed, increasing the resistance value of the depth sensing resistors 22 connected in parallel. The display structure 3 collects data in real time, including the number of bursting resistors 1 forming an open circuit, the distance between two adjacent depth sensing resistors 22, the resistance value of the calibration resistance line 5, and the resistance value between the positive terminal 31 and the calibration contact 33. The calculation module 35 inside the display structure 3 performs calculations based on this data. For example, based on the number of bursting resistors 1 forming an open circuit and the distance between the depth sensing resistors 22, the straight-line distance between the concrete surface and the bottom of the pouring trench can be calculated. Combined with the relevant resistance value of the calibration resistance line 5, the laying length of the calibration resistance line 5 can be calculated. Subtracting the two yields the real-time concrete surface depth. Finally, the display module of the display structure 3 displays the real-time concrete surface depth so that construction personnel can promptly understand the concrete pouring situation.

[0059] Furthermore, it also includes the following steps: When the display structure 3 detects that the number of burst resistors 1 that form an open circuit has not changed within a preset time period, an alarm message is issued; the alarm message is used to indicate an abnormal pouring.

[0060] It should be noted that display structure 3 continuously records the change in the number of burst resistors 1 forming open circuits throughout the measurement process. During normal seepage barrier construction, as concrete is continuously poured, the concrete surface rises, constantly compressing the burst resistors 1 and causing them to break one by one, thus gradually increasing the number of broken burst resistors 1. Display structure 3 monitors the number of broken burst resistors 1 within a preset time period. The preset time period can be set according to actual needs.

[0061] When the display structure 3 detects that the number of burst resistors 1 that form an open circuit within a preset time period has not changed, the alarm triggering condition is met. This indicates that during this period, the concrete surface may not rise, or rise extremely slowly, almost negligible. This is inconsistent with normal pouring construction conditions, so it is judged as a pouring abnormality.

[0062] Once the alarm is triggered, structure 3 will display an alarm message to alert construction personnel that an abnormality has occurred during the pouring process. This could be due to insufficient concrete supply, blocked conduits, or equipment malfunction, preventing the concrete from rising properly. Upon receiving the alarm, construction personnel can promptly inspect the pouring site, quickly identify the problem, and take appropriate corrective measures to prevent quality issues caused by pouring abnormalities, such as discontinuous pouring or voids in the cutoff wall, thus ensuring the quality and progress of the cutoff wall construction.

[0063] Furthermore, the display structure 3 determines and displays the real-time concrete surface depth based on the number of burst resistors 1 forming the circuit break, the spacing of the depth sensing resistors 22, the resistance value of the calibration resistance line 5, and the resistance value between the positive electrode 31 and the calibration contact 33. This specifically includes the following steps: Based on the number of blasting resistors 1 that form the circuit break and the spacing of depth sensing resistors 22, the straight-line distance between the concrete surface and the bottom of the pouring trench is calculated. The laying length of the calibration resistance line 5 is calculated based on the resistance value of the calibration resistance line 5 and the resistance value between the positive electrode 31 and the calibration contact 33. The difference between the laying length of the calibration resistance line 5 and the straight-line distance between the concrete surface and the bottom of the pouring trench is calculated to obtain the real-time concrete surface depth and display it on the display structure 3.

[0064] It should be noted that during the pouring of the anti-seepage wall, the bursting resistor 1 and the depth sensing resistor 22 are connected in parallel, and the depth sensing resistors 22 are evenly distributed on the signal feedback line 2. When the concrete surface rises, starting from the end near the counterweight structure 6, the aggregate in the concrete squeezes the bursting resistor 1 one by one, causing its outer shell 11 to break and form an open circuit. The resistance value of the corresponding depth sensing resistor 22 increases. The display structure 3 records the number of bursting resistors 1 that form an open circuit. Since the spacing of the depth sensing resistors 22 is known, the straight-line distance between the concrete surface and the bottom of the pouring trench can be calculated by a simple multiplication operation: multiplying the number of bursting resistors 1 that form an open circuit by the spacing of the depth sensing resistors 22. For example, if the spacing between two adjacent depth sensing resistors 22 is 0.25m, and 5 bursting resistors 1 form an open circuit, then the straight-line distance between the concrete surface and the bottom of the pouring trench is 0.25 × 5 = 1.25m. This step, based on the system's monitoring of the resistance changes caused by the bursting resistance of concrete, converts the resistance changes into actual distance values, and is one of the key steps in determining the depth of the concrete surface.

[0065] The calibration resistance wire 5 is a cable with uniformly distributed resistance, and its resistance value is a (Ω / m). The processing module 36 of the display structure 3 measures the resistance value b (Ω) between the positive terminal 31 and the calibration contact 33. According to the formula "length = resistance value ÷ resistance value per unit length", the laying length of the calibration resistance wire 5 is b ÷ a (m). This calculation utilizes the characteristic of uniform resistance distribution of the calibration resistance wire 5, and indirectly obtains its laying length by measuring the resistance value. Because one end of the calibration resistance wire 5 is connected to the calibration contact 33 of the display structure 3, and the other end is connected to the counterweight structure 6, its laying length reflects the distance from the display structure 3 to the counterweight structure 6. The counterweight structure 6 touches the bottom of the pouring groove. This length information is crucial for the subsequent accurate calculation of the concrete surface depth.

[0066] Specifically, the ends of the main connecting wire 4, signal feedback wire 2, and calibration resistor wire 5 are all connected to the counterweight structure 6, forming a three-terminal parallel ground connection, equivalent to three branches connected in parallel to the power supply terminals of the display structure 3. The resistance value b between the positive electrode 31 and the calibration contact 33 corresponds only to the resistance value of the calibration resistor wire 5. Since the calibration resistor wire 5 is independently connected between 33 and the counterweight structure 6, and is connected in parallel with the signal feedback wire 2 and the main connecting wire 4 branch without current crossing, its resistance value can be directly obtained through Ohm's law, that is, the resistance value b between the positive electrode 31 and the calibration contact 33 is equal to the product of the unit length resistance value of the calibration resistor wire 5 and its laying length. The resistance change of the signal feedback wire 2 only affects the current of the measuring contact 32 and does not interfere with the calibration resistor wire branch, so the resistance values ​​of the two can be calculated independently.

[0067] The resistance change of signal feedback line 2 is caused by the break in the burst resistor and is unrelated to the calibration resistance line 5. After the system is lowered to the bottom of the slot, the laying length of the calibration resistance line 5 is a fixed value, the distance from the top to the bottom of the slot. Therefore, the aforementioned resistance value b will not change after installation.

[0068] After obtaining the straight-line distance between the concrete surface and the bottom of the pouring trench, as well as the laying length of the calibration resistance wire 5, the calculation module 35 of the display structure 3 calculates the difference between the two to obtain the real-time concrete surface depth. This is because the laying length of the calibration resistance wire 5 represents the distance from the display structure 3 to the bottom of the trench, while the straight-line distance between the concrete surface and the bottom of the pouring trench is the distance from the concrete surface to the bottom of the trench. The difference between the two is the distance from the location of the display structure 3 (generally near the top of the trench) to the concrete surface, which is the real-time concrete surface depth. Finally, the display module 34 of the display structure 3 displays the calculated real-time concrete surface depth in an intuitive way, such as displaying the specific value on the screen, or indicating the depth status through the status change of the indicator lights, so that construction personnel can check at any time, keep abreast of the concrete pouring progress, and ensure the smooth progress of the anti-seepage wall pouring construction.

[0069] Furthermore, it also includes the following steps: The system monitors the resistance value change caused by the open circuit of the blasting resistor 1 in real time. When a change in resistance value is detected and the change in resistance value meets the false triggering conditions, it is determined that the change in current resistance value has the possibility of false triggering. The false triggering conditions are that the change in resistance value caused by the open circuit of the blasting resistor 1 exceeds the preset range, or the number of times the resistance value changes due to the open circuit of the blasting resistor 1 within a unit time is greater than the preset allowable number. Obtain the historical data collection set of display structure 3; the historical data collection set includes at least the resistance value between the positive terminal 31 and the calibration contact 33 for each collection and the timestamp corresponding to the resistance value. Based on the historical data collection, analyze the continuity and regularity of the resistance value changes; if the regularity of the resistance value changes does not show abrupt changes or abnormal fluctuations that do not conform to the rise of the concrete surface, then determine that the current resistance value change is a false triggering situation, and delete the resistance data corresponding to the current resistance value change in display structure 3.

[0070] It should be noted that the system monitors the resistance value change of the depth sensing resistor 22 caused by the break in the circuit of the burst resistor 1 in real time. When a change in resistance value is detected, it immediately determines whether the change meets the false triggering conditions. The false triggering conditions are set in two aspects: First, the resistance value change caused by the break in the circuit of the burst resistor 1 exceeds the preset range. Under normal circumstances, the concrete squeezes the burst resistor 1, causing it to break the circuit, and the change in resistance value is within a reasonable range. If the change is too large, it may not be caused by normal concrete squeezing, but rather by external interference causing abnormal resistance changes. Second, the number of times the resistance value changes due to the break in the circuit of the burst resistor 1 per unit time is greater than the preset allowable number. Because the concrete surface rises at a relatively stable speed during normal pouring, the frequency of the burst resistor 1 being squeezed and broken should also be within a certain range. If the number of resistance value changes per unit time is too high, there may be a false triggering situation. When the resistance value change meets either of the above conditions, it is determined that the current resistance value change has the potential to be a false trigger.

[0071] At this point, to further determine whether it is a false trigger, the system will acquire the historical data collection set of display structure 3. The historical data collection set includes at least the resistance value between the positive terminal 31 and the calibration contact 33 for each acquisition, as well as the timestamp corresponding to the resistance value. The change in the resistance value between the positive terminal 31 and the calibration contact 33 can reflect the system's operating status information, while the timestamp records the time sequence of these data acquisitions. By collecting and analyzing this historical data, it is possible to understand the changes in the system's resistance value at different points in time, providing a reference for subsequently judging whether the current resistance value change is normal.

[0072] Based on the acquired historical data set, the system analyzes the continuity and regularity of resistance value changes. During normal concrete pouring, as the concrete surface rises, the bursting resistor 1 is sequentially squeezed and broken. The change in resistance value should be continuous and regular, matching the speed and process of the concrete surface rise. If the pattern of resistance value changes does not exhibit abrupt changes or abnormal fluctuations that occur during the concrete surface rise—for example, a sudden, large change in resistance value that is completely different from previous historical data patterns and does not conform to the logic of normal concrete surface rise—then the current resistance value change can be determined as a false trigger. Once a false trigger is identified, the system deletes the resistance data corresponding to the current resistance value change from display structure 3. This is because the data generated by a false trigger is incorrect; if it is not deleted, it will affect the accurate calculation and display of the real-time concrete surface depth in display structure 3, leading to deviations in measurement results and affecting the construction personnel's judgment of the pouring situation.

[0073] The principle of judging the possibility of false triggering is based on the monitoring and analysis of the resistance value change when the blasting resistor 1 forms an open circuit. By setting reasonable judgment criteria and combining the normal range of resistance value change when the concrete surface rises in actual construction, possible abnormal situations can be identified to ensure the accuracy of measurement data.

[0074] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A system for measuring the depth of concrete surface during the construction of a seepage-proof wall, characterized in that, include: The signal feedback line (2), main connecting wire (4), and calibration resistor line (5) are used in conjunction. The first end of the signal feedback line (2) is electrically connected to the measuring contact (32) of the display structure (3). The first end of the main connecting wire (4) is electrically connected to the positive electrode (31) of the display structure (3). The first end of the calibration resistor line (5) is electrically connected to the calibration contact (33) of the display structure (3). The second ends of the signal feedback line (2), the main connecting wire (4), and the calibration resistor line (5) are electrically connected, and the second ends of all three are connected to the counterweight structure (6). The signal feedback line (2) has multiple depth sensing resistors (22) arranged at equal intervals. The display structure (3) is used to display the depth of the concrete surface in the pouring slot in real time. The number of the bursting resistors (1) is equal to the number of the depth sensing resistors (22), and the bursting resistors (1) and the depth sensing resistors (22) are connected in parallel one by one; the bursting resistors (1) have a breakable outer shell (11). The outer shell (11) is hollow inside and has an opening; The burst resistor (1) also includes: A sealing cap (14) is connected to the opening edge of the outer shell (11), and a closed cavity is formed between the sealing cap (14) and the outer shell (11), and the closed cavity is filled with a filling liquid (15). A thin-film resistor (12) is disposed on the surface of the housing (11); the thin-film resistor (12) is connected to two pins (13), which are used to electrically connect to the signal feedback line (2); The measuring system is lowered into the pouring slot, and concrete is poured after the counterweight structure (6) touches the bottom of the pouring slot. During pouring, the concrete surface rises, and the concrete squeezes the shell (11) of the burst resistor (1) one by one from the end close to the counterweight structure (6) to the end away from the counterweight structure (6), so that the burst resistor (1) forms an open circuit, and the resistance value of the corresponding depth sensing resistor (22) increases. The display structure (3) determines and displays the real-time concrete surface depth based on the number of burst resistors (1) that form an open circuit, the spacing of the depth sensing resistors (22), the resistance value of the calibration resistance line (5), and the resistance value between the positive electrode (31) and the calibration contact (33).

2. The concrete surface depth measurement system for anti-seepage wall pouring construction according to claim 1, characterized in that, The outer shell (11) is made of glass or ceramic.

3. The concrete surface depth measurement system for anti-seepage wall pouring construction according to claim 1, characterized in that, The display structure (3) includes: The communication-connected display module (34), calculation module (35), and processing module (36) include the positive electrode (31), the measuring contact (32), and the calibration contact (33). The calculation module (35) is used to count the number of burst resistors (1) that form an open circuit. The processing module (36) is used to determine the real-time concrete surface depth based on the number of burst resistors (1) that form an open circuit, the spacing of the depth sensing resistors (22), the resistance value of the calibration resistance line (5), and the resistance value between the positive electrode (31) and the calibration contact (33). The display module (34) is used to display the real-time concrete surface depth.

4. The concrete surface depth measurement system for anti-seepage wall pouring construction according to claim 1, characterized in that, The signal feedback line (2) also includes: Feedback cable (21), on which a plurality of depth sensing resistors (22) are arranged at equal intervals.

5. The concrete surface depth measurement system for anti-seepage wall pouring construction according to claim 1, characterized in that, The distance between two adjacent depth sensing resistors (22) is 0.25m, and the size of the bursting resistor (1) is 1.5 times the size of the aggregate in the concrete.

6. A method for measuring the depth of concrete surface during the construction of a seepage-proof wall, implemented based on the concrete surface depth measurement system for the construction of a seepage-proof wall as described in any one of claims 1-5, characterized in that, The method includes the following steps: Weld the second ends of the signal feedback line (2), the main connecting wire (4) and the calibration resistor line (5) together, and then connect them to the counterweight structure (6); Place the connected counterweight structure (6) into the slot to be poured, so that the signal feedback line (2), the main connecting wire (4) and the calibration resistance line (5) extend vertically to the bottom of the slot to be poured. When the counterweight structure (6) touches the bottom of the slot to be poured, reserve the target length of the signal feedback line (2), the main connecting wire (4) and the calibration resistance line (5) at the top of the slot and fix them. The measurement contact (32), positive electrode (31), and calibration contact (33) on the display structure (3) are connected to the signal feedback line (2), the main connecting wire (4), and the calibration resistance line (5) respectively. During concrete pouring, as the concrete surface rises, the concrete squeezes the bursting resistor (1), causing it to form an open circuit. The display structure (3) determines and displays the real-time concrete surface depth based on the number of bursting resistors (1) forming an open circuit, the spacing of the depth sensing resistors (22), the resistance value of the calibration resistance line (5), and the resistance value between the positive electrode (31) and the calibration contact (33).

7. The method for measuring the depth of concrete surface during the construction of a seepage-proof wall according to claim 6, characterized in that, It also includes the following steps: When the display structure (3) detects that the number of burst resistors (1) forming an open circuit within a preset time period has not changed, an alarm message is issued; the alarm message is used to indicate an abnormal pouring.

8. The method for measuring the depth of concrete surface during the construction of a seepage-proof wall according to claim 6, characterized in that, The display structure (3) determines and displays the real-time concrete surface depth based on the number of burst resistors (1) forming the circuit break, the spacing of the depth sensing resistors (22), the resistance value of the calibration resistance line (5), and the resistance value between the positive electrode (31) and the calibration contact (33). Specifically, it includes the following steps: The straight-line distance between the concrete surface and the bottom of the pouring trench is calculated based on the number of blasting resistors (1) that form the circuit break and the spacing of the depth sensing resistors (22). The laying length of the calibration resistance line (5) is calculated based on the resistance value of the calibration resistance line (5) and the resistance value between the positive electrode (31) and the calibration contact (33). Calculate the difference between the laying length of the calibration resistance line (5) and the straight distance between the concrete surface and the bottom of the pouring groove, obtain the real-time concrete surface depth and display it on the display structure (3).

9. A method for measuring the depth of concrete surface during the construction of a seepage-proof wall according to claim 6, characterized in that, It also includes the following steps: Real-time monitoring of the resistance value change caused by the break in the blast resistor (1). When the resistance value changes and the change in resistance value meets the false triggering conditions, it is determined that the change in the current resistance value has the possibility of false triggering. The false triggering conditions are that the change in resistance value caused by the break in the blast resistor (1) exceeds the preset range, or the number of times the resistance value changes caused by the break in the blast resistor (1) within a unit time is greater than the preset allowable number. Obtain the historical data collection set of the display structure (3); the historical data collection set includes at least the resistance value between the positive electrode (31) and the calibration contact (33) for each collection and the timestamp corresponding to the resistance value; Based on the historical data collection set, analyze the continuity and regularity of the resistance value change; if the regularity of the resistance value change does not conform to the sudden change or abnormal fluctuation when the concrete surface rises, then determine that the current resistance value change is a false trigger situation, and delete the resistance data corresponding to the current resistance value change in the display structure (3).

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