Method and system for estimating service life of steel-concrete component of water gate bottom plate

Abstract

The invention relates to the technical field of sluice bottom plates, in particular to a sluice bottom plate reinforced concrete component service life estimation method and system. The method comprises the following steps: acquiring a chloride ion reference diffusion coefficient of water gate bottom plate concrete, performing sound wave monitoring on the water gate bottom plate concrete, acquiring ultrasonic propagation time and ultrasonic head wave amplitude of a plurality of measurement points, and calculating a crack area proportion of a first preset surface of the water gate bottom plate concrete; calculating a crack depth ratio based on the sound wave monitoring data of the second preset surface and the third preset surface of the sluice bottom plate concrete; calculating a fracture volume ratio by combining the fracture area ratio and the fracture depth ratio, and correcting the chloride ion reference diffusion coefficient to obtain a corrected chloride ion diffusion coefficient; and the corrected chloride ion diffusion coefficient is substituted into a preset chloride ion diffusion model, and the service life of the water gate bottom plate reinforced concrete component is estimated. According to the method, the accuracy of the life estimation result of the sluice bottom plate reinforced concrete component is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sluice floor, in particular to a sluice floor steel-concrete component life estimation method and system. BACKGROUND

[0002] The sluice floor steel-concrete component is a sluice chamber foundation component made of reinforced concrete, and its core function is to bear the load of the upper structure weight, water pressure and other loads and transmit them to the foundation, resist sliding and achieve erosion and seepage prevention, and ensure the stable operation of the sluice. Due to the long-term scouring and erosion of water flow and the load effect, the component is prone to aging and damage. Life estimation can identify potential safety hazards in advance, avoid sudden collapse accidents, and also can coordinate funds, materials and construction time, reduce resource waste in emergency repair, and ensure the long-term flood control and water supply function of the sluice.

[0003] In the prior art, the classic Fick's second diffusion law is only applicable to intact concrete and cannot effectively handle the case where cracks exist, which ultimately leads to a serious deviation between the life prediction result and the actual situation. SUMMARY

[0004] In order to solve the technical problem that the life estimation result of the sluice floor steel-concrete component is not accurate, the purpose of the present application is to provide a sluice floor steel-concrete component life estimation method and system, and the technical solution adopted is as follows: In a first aspect, the present application provides a sluice floor steel-concrete component life estimation method, which comprises: obtaining a chloride ion reference diffusion coefficient of the sluice floor concrete, and performing acoustic wave monitoring on the sluice floor concrete to obtain the ultrasonic propagation time and the ultrasonic first wave amplitude of a plurality of measurement points; based on the ultrasonic propagation time and the ultrasonic first wave amplitude, calculating the crack area ratio of a first preset surface of the sluice floor concrete; based on the acoustic wave monitoring data of a second preset surface and a third preset surface of the sluice floor concrete, calculating the crack depth ratio; combining the crack area ratio and the crack depth ratio, calculating the crack volume ratio, and based on the crack volume ratio, correcting the chloride ion reference diffusion coefficient to obtain a corrected chloride ion diffusion coefficient; substituting the corrected chloride ion diffusion coefficient into a predetermined chloride ion diffusion model to realize life estimation of the sluice floor steel-concrete component.

[0005] In some embodiments, the obtaining of the chloride ion reference diffusion coefficient of the sluice floor concrete comprises: synchronously taking standard concrete test blocks during the construction of the sluice floor steel-concrete component; detecting the standard concrete test blocks by using a rapid chloride ion migration method; The chloride ion reference diffusion coefficient of the sluice gate bottom slab concrete was directly determined by the results of the rapid chloride ion migration method.

[0006] In some embodiments, the acoustic monitoring of the concrete bottom slab of the sluice gate to obtain the ultrasonic propagation time and the amplitude of the first ultrasonic wave at multiple measurement points includes: The top surface and two sides facing different directions of the concrete bottom slab of the sluice gate are designated as three pre-designed surfaces. A two-dimensional measurement grid is formed by drawing grid lines at preset intervals on three preset surfaces, and the grid nodes are used as measurement points. The ultrasonic propagation time and the amplitude of the first wave of the ultrasonic wave are detected at each measurement point using a preset transducer.

[0007] In some embodiments, calculating the proportion of crack area on the first preset surface of the sluice gate bottom slab concrete based on the ultrasonic wave propagation time and the amplitude of the first ultrasonic wave includes: The top surface of the concrete bottom slab of the sluice gate is designated as the first preset surface; Extract the ultrasonic propagation time and the amplitude of the first ultrasonic wave at all measurement points on the first preset surface; The suspected crack rate of each measurement point is determined based on the ultrasonic wave propagation time and the amplitude of the first ultrasonic wave at each measurement point. The suspected crack rate of all measurement points on the first preset surface is statistically analyzed, the arithmetic mean of all suspected crack rates is calculated, and the arithmetic mean is determined as the crack area ratio of the first preset surface.

[0008] In some embodiments, calculating the crack depth ratio based on acoustic monitoring data from the second and third preset surfaces of the sluice gate bottom slab concrete includes: The two sides of the concrete bottom slab of the sluice gate with different orientations are set as the second preset surface and the third preset surface, respectively. The crack area ratio of the second preset surface and the crack area ratio of the third preset surface are calculated respectively. Determine the reliability of the crack depth ratio of the second preset surface and the reliability of the crack depth ratio of the third preset surface; Based on the crack area ratio of the second preset surface and the crack area ratio of the third preset surface, as well as the reliability of the crack depth ratio of the second preset surface and the reliability of the crack depth ratio of the third preset surface, the crack depth ratio of the sluice gate bottom slab concrete is calculated.

[0009] In some embodiments, determining the reliability of the crack depth ratio of the second preset surface and the reliability of the crack depth ratio of the third preset surface includes: The edge length between the second preset surface and the third preset surface, and the edge length between the second preset surface and the first preset surface are measured. The reliability of the crack depth ratio of the second preset surface is determined by the ratio of the two edge lengths. The edge length between the third preset surface and the second preset surface, and the edge length between the third preset surface and the first preset surface are measured. The reliability of the crack depth ratio of the third preset surface is determined by the ratio of the two edge lengths.

[0010] In some embodiments, calculating the crack volume ratio by combining the crack area ratio and the crack depth ratio includes: Determine the proportion of the crack area on the first preset surface; Determine the proportion of crack depth obtained from acoustic monitoring data based on the second preset surface and the third preset surface; The volume ratio of cracks in the concrete of the sluice gate bottom slab is determined based on the ratio of crack area and the ratio of crack depth.

[0011] In some embodiments, the step of correcting the chloride ion baseline diffusion coefficient based on the crack volume ratio to obtain a corrected chloride ion diffusion coefficient includes: Construct representative volumetric units containing cracks and concrete substrates; It is clear that chloride ions are transported along two parallel paths within the representative volume unit: the crack path and the matrix path. By combining the fracture volume ratio, the chloride ion baseline diffusion coefficient, and the chloride ion diffusion coefficient along the fracture path, the chloride ion baseline diffusion coefficient is corrected through comprehensive calculation to obtain the corrected chloride ion diffusion coefficient.

[0012] In some embodiments, substituting the modified chloride ion diffusion coefficient into a preset chloride ion diffusion model to estimate the lifespan of the reinforced concrete components of the sluice gate bottom slab includes: Substitute the corrected chloride ion diffusion coefficient into the chloride ion diffusion model based on Fick's second law; Determine the chloride ion concentration on the concrete surface and the thickness of the reinforced concrete protective layer that takes into account construction negative deviations, and input the chloride ion concentration and the thickness of the reinforced concrete protective layer into the chloride ion diffusion model to output the chloride ion concentration on the steel surface; The time required for the chloride ion concentration on the surface of the reinforcing steel to reach the critical chloride ion concentration is determined, and this time is defined as the estimated lifespan of the steel-concrete composite structure at the bottom of the sluice gate.

[0013] Secondly, embodiments of the present invention provide a life prediction system for reinforced concrete components of sluice gate bottom slabs, the system comprising the following modules: The acquisition module is used to obtain the chloride ion reference diffusion coefficient of the concrete bottom plate of the sluice gate, perform acoustic wave monitoring on the concrete bottom plate of the sluice gate, and obtain the ultrasonic wave propagation time and ultrasonic wave amplitude at multiple measurement points. The crack area ratio calculation module is used to calculate the crack area ratio of the first preset surface of the concrete of the sluice gate bottom plate based on the ultrasonic wave propagation time and the ultrasonic wave amplitude. The crack depth ratio calculation module is used to calculate the crack depth ratio based on the acoustic monitoring data of the second and third preset surfaces of the concrete of the sluice gate bottom slab. The correction module is used to calculate the crack volume ratio by combining the crack area ratio and the crack depth ratio, and to correct the chloride ion reference diffusion coefficient based on the crack volume ratio to obtain the corrected chloride ion diffusion coefficient. The prediction module is used to substitute the corrected chloride ion diffusion coefficient into the preset chloride ion diffusion model to predict the life of the steel-concrete components of the sluice gate bottom plate.

[0014] Thirdly, embodiments of the present invention provide an electronic device, including a memory and a processor, wherein the memory stores executable code, and when the processor executes the executable code, it implements the various possible implementations of the first aspect.

[0015] Fourthly, embodiments of the present invention provide a computer program product comprising: computer program code, which, when executed on a computer, causes the computer to perform the method described in the first aspect or any possible implementation thereof.

[0016] Fifthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to perform the various possible implementations of the first aspect.

[0017] The embodiments of the present invention have at least the following beneficial effects: This invention accurately obtains the chloride ion baseline diffusion coefficient and ultrasonic parameters through sample block testing and acoustic monitoring. Then, based on the ultrasonic parameters, it calculates the crack area ratio on the first preset surface, and combines this with data from the second and third preset surfaces to calculate the crack depth ratio. Multiplying these two values ​​yields the crack volume ratio. This ratio is then used to correct the chloride ion baseline diffusion coefficient, which is then substituted into the diffusion model to predict the sluice gate's lifespan. The entire process, through multi-dimensional monitoring and precise calculation, effectively incorporates the impact of cracks on chloride ion diffusion, solving the problem of large prediction deviations caused by traditional models ignoring cracks. This significantly improves the accuracy of lifespan prediction, providing a scientific basis for sluice gate maintenance decisions and ensuring the long-term stable operation of the sluice gate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart of a method for estimating the lifespan of a steel-concrete composite structure at the bottom of a sluice gate, provided in one embodiment of the present invention. Figure 2 This is a system block diagram of a sluice gate bottom plate steel-concrete component life prediction system provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a computer device provided in one embodiment of the present invention. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a method and system for estimating the lifespan of a steel-concrete composite structure for a sluice gate bottom plate proposed in accordance with the present invention.

[0021] In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0022] In the description of the embodiments of the present invention, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present invention, "multiple" means two or more.

[0023] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] The embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0026] The following description, in conjunction with the accompanying drawings, details the specific scheme of the method and system for estimating the lifespan of a steel-concrete composite structure for a sluice gate bottom plate provided by this invention.

[0027] Example 1: Please see Figure 1 The diagram illustrates a flowchart of a method for estimating the lifespan of a reinforced concrete slab at the bottom of a sluice gate, according to an embodiment of the present invention. The method includes the following steps: S10. Obtain the chloride ion reference diffusion coefficient of the sluice gate bottom slab concrete, perform acoustic wave monitoring on the sluice gate bottom slab concrete, and obtain the ultrasonic wave propagation time and ultrasonic wave amplitude at multiple measurement points.

[0028] The chloride ion baseline diffusion coefficient is a key parameter characterizing the impermeability of intact concrete, referring to the basic rate of chloride ion diffusion in crack-free concrete. To obtain the chloride ion baseline diffusion coefficient, standard concrete test blocks must be collected simultaneously during the construction of the reinforced concrete components of the sluice gate base slab. These test blocks must use the same materials, mix proportions, and curing conditions as the actual components to ensure their performance is consistent with the actual component concrete. Subsequently, the standard concrete test blocks are tested in the laboratory using the rapid chloride ion migration method. This method accelerates the migration of chloride ions in the test blocks by applying an electric field, rapidly determining the diffusion capacity of chloride ions in concrete. Finally, the chloride ion baseline diffusion coefficient of the sluice gate base slab concrete is directly determined from the test results.

[0029] Simultaneously, acoustic monitoring of the sluice gate's bottom slab concrete is necessary to obtain information related to cracks. First, the top surface and two sides facing different directions of the sluice gate's bottom slab concrete are designated as three pre-defined surfaces. These three surfaces are exposed, prone to cracking, and easy to monitor. Then, pre-set intervals are established on each of the three pre-defined surfaces, and grid lines are drawn using a measuring tape and ink lines to form a regular two-dimensional measurement grid. The grid nodes are the ultrasonic measurement points. The measurement points must fully cover the entire evaluation area of ​​the three pre-defined surfaces to ensure that the monitoring data reflects the overall crack distribution of the component. Specifically, the pre-set interval can be 1 meter, or it can be adjusted according to actual needs.

[0030] Furthermore, at each measurement point, a dedicated planar transducer with integrated acoustic wave transmission and reception functions can be selected, or two independent transducers can be placed side-by-side at a preset fixed interval on the same preset surface. An ultrasonic testing instrument is used to detect and record the ultrasonic wave propagation time and the initial wave amplitude at each measurement point. The ultrasonic wave propagation time is the time it takes for the sound wave to travel from the transmitting end to the receiving end, and the initial wave amplitude is the energy intensity of the first acoustic wave signal acquired at the receiving end. Both can reflect whether there are cracks in the concrete below the measurement point. Specifically, the preset fixed interval can be 150mm, but it can also be adjusted according to actual needs.

[0031] S11. Based on the ultrasonic wave propagation time and the amplitude of the first wave of the ultrasonic wave, calculate the proportion of crack area on the first preset surface of the concrete of the sluice gate bottom plate.

[0032] The crack area ratio refers to the ratio of the cracked area in the first preset surface to the total area of ​​that surface, used to characterize the distribution density of surface cracks. Specifically, the top surface of the concrete bottom slab of the sluice gate is first determined as the first preset surface, i.e., surface A. This surface is the main surface of the component exposed to the water level fluctuation zone and splash zone, where cracks are more likely to occur and have a significant impact on chloride ion transport. Then, the ultrasonic propagation time and the amplitude of the first wave of ultrasound at all measurement points on the first preset surface are extracted. Based on these two parameters, the suspected crack rate of each measurement point is determined. The suspected crack rate is a parameter reflecting the possibility of cracks below the concrete measurement point. Ultrasonic waves have the shortest propagation path and the least time in uniform and dense concrete. If there is a crack below the measurement point, the sound wave needs to travel in a roundabout way, resulting in a longer propagation time. At the same time, cracks will cause scattering and reflection of sound wave energy, reducing the amplitude of the first wave. Therefore, the longer the propagation time and the smaller the amplitude of the first wave, the higher the suspected crack rate of that measurement point. Specifically, the suspected crack rate... The calculation formula is: in, Let f represent the suspected crack rate at the i-th measurement point on the first preset surface of the concrete, i.e., surface A. Let f represent the maximum-minimum normalization function, used to eliminate differences in parameter magnitudes between different measurement points, making the results comparable. This represents the amplitude of the first ultrasonic wave obtained at the i-th measurement point on the concrete surface A. This represents the ultrasonic wave propagation time obtained at the i-th measurement point on the concrete surface A. It should be noted that the maximum and minimum values ​​used in the max-min normalization are obtained from the historical database; other normalization functions can also be used for f, such as the Z-score normalization function.

[0033] After statistically analyzing the suspected crack rates at all measurement points on the first preset surface, the arithmetic mean of all suspected crack rates is calculated, and this average is determined as the crack area proportion of the first preset surface. When the measurement points uniformly and densely cover the entire surface, the arithmetic mean of the suspected crack rates at all measurement points can be approximately equal to the expected probability of a crack appearing at any point on the entire surface, which is statistically equivalent to the crack area proportion of that surface. Specifically, the crack area proportion... The calculation formula is: in, This indicates the percentage of the crack area on surface A of the concrete. This represents the suspected crack rate at the i-th measurement point on concrete surface A. This indicates the total number of measurement points on surface A of the concrete.

[0034] S12. Calculate the crack depth ratio based on the acoustic monitoring data of the second and third preset surfaces of the concrete bottom slab of the sluice gate.

[0035] The crack depth ratio is a parameter characterizing the extent to which cracks extend within the concrete, calculated using acoustic monitoring data from the second and third preset surfaces. First, two sides of the sluice gate bottom slab concrete facing different directions are designated as the second and third preset surfaces, respectively. The second preset surface is surface B, and the third preset surface is surface C. Using the same method as calculating the crack area ratio of the first preset surface, the suspected crack rate is determined by the ultrasonic wave propagation time and initial wave amplitude at each surface's measurement points. Then, the arithmetic mean of all suspected crack rates is calculated to obtain the crack area ratios for the second and third preset surfaces, respectively.

[0036] Furthermore, the reliability of the crack depth ratio of the second and third preset surfaces is determined. The reliability of the crack depth ratio is an indicator that measures whether the ratio of the side crack area can accurately reflect the crack depth, and it is related to the component edge length ratio.

[0037] Specifically, the edge length between the second and third preset surfaces (i.e., the edge length in the component's thickness direction) and the edge length between the second and first preset surfaces (i.e., the edge length in the height direction of the second preset surface) are measured. The reliability of the crack depth ratio of the second preset surface is determined by the ratio of the component's thickness-direction edge length to the height-direction edge length of the second preset surface. The calculation formula is as follows: in, This indicates the reliability of the crack area ratio on the second pre-defined concrete surface, i.e., surface B, relative to the crack depth ratio. The length of the edge between concrete surface B and concrete surface C is represented by α, which is a preset first parameter related to the material, β, which is a preset second parameter related to the environment, and exp, which is an exponential function with the natural constant as the base. The preset first parameter is set to 0.3, and the preset second parameter is set to 0.6. These specific values ​​are determined through analysis of long-term observation data of the material and the environment.

[0038] Similarly, the reliability of the crack depth ratio of the third preset surface. The calculation formula is as follows: in, This indicates the reliability of the crack area ratio on the third pre-defined concrete surface, surface C, relative to the crack depth ratio. This represents the edge length between concrete surface C and concrete surface A.

[0039] Furthermore, the reliability of the crack depth ratios of the second and third preset surfaces is first normalized to eliminate differences in magnitude, ensuring that the sum of their weights is 1. Then, the normalized reliability is used as the weighting coefficients for the crack area ratios of the second and third preset surfaces, respectively. The crack depth ratio of the sluice gate bottom slab concrete is obtained through weighted summation. Specifically, the crack depth ratio of the concrete... The specific formula is as follows: in, This indicates the percentage of crack depth in the concrete. This indicates the reliability of the ratio of crack area to crack depth on concrete surface B. This indicates the reliability of the ratio of crack area to crack depth on the C-side of concrete. This indicates the percentage of the crack area on surface B of the concrete. This indicates the percentage of crack area on surface C of the concrete. It should be noted that... The value range is 0-1.

[0040] S13. Calculate the crack volume ratio by combining the crack area ratio and the crack depth ratio, and correct the chloride ion reference diffusion coefficient based on the crack volume ratio to obtain the corrected chloride ion diffusion coefficient.

[0041] Specifically, the proportion of crack area included in the calculation is first defined as the proportion of crack area on the first preset surface. The crack depth percentage used in the calculation is the crack depth percentage obtained based on the acoustic monitoring data of the second and third preset surfaces. Furthermore, the proportion of concrete crack volume. The specific calculation formula is as follows: in, Indicates the percentage of concrete crack volume. This indicates the percentage of the crack area on surface A of the concrete. This indicates the percentage of crack depth in the concrete. It should be noted that... The value range is 0-1.

[0042] Furthermore, when correcting the chloride ion baseline diffusion coefficient based on the volume ratio of cracks, it is necessary to first construct a representative volumetric unit containing both cracks and the concrete matrix. This representative volumetric unit is the smallest volumetric unit that reflects the overall performance of the concrete, containing both the concrete matrix and cracks as core components. It is determined that chloride ions within this representative volumetric unit are transported along two parallel paths: Path one is the crack path, where chloride ions are rapidly transported through the pore solution within the cracks, exhibiting a high diffusion coefficient but a small cross-sectional area; Path two is the matrix path, where chloride ions diffuse slowly within the capillary network of intact concrete, exhibiting a low diffusion coefficient but a large cross-sectional area. The total diffusion flux is the sum of the diffusion fluxes along both paths, similar to the principle of parallel resistors in a circuit.

[0043] The chloride ion diffusion coefficient along the crack path is based on the diffusion characteristics of chloride ions in water and can be approximated as equal to the chloride ion diffusion coefficient in water. Combining the crack volume ratio, the baseline chloride ion diffusion coefficient, and the chloride ion diffusion coefficient along the crack path, the baseline chloride ion diffusion coefficient is corrected through comprehensive calculation. Specifically, the following formula represents the corrected chloride ion diffusion coefficient. : in, This represents the corrected chloride ion diffusion coefficient. This represents the percentage of concrete crack volume, where arctan is the arctangent function. This represents the reference diffusion coefficient of chloride ions in concrete. The chloride ion diffusion coefficient representing the crack path can be approximated here as equal to the chloride ion diffusion coefficient in water. This formula reflects the effect of the volume ratio of cracks on the diffusion capacity of chloride ions; the more cracks there are, the greater the corrected diffusion coefficient.

[0044] S14. Substitute the corrected chloride ion diffusion coefficient into the preset chloride ion diffusion model to estimate the lifespan of the steel-concrete components of the sluice gate bottom plate.

[0045] Specifically, the corrected chloride ion diffusion coefficient is substituted into the preset chloride ion diffusion model. This model is based on Fick's second law, a classic law describing the diffusion process of substances in a medium, and is applicable to the diffusion behavior of chloride ions in concrete. The corresponding chloride ion diffusion model formula is as follows: = in, For time Distance from concrete surface Chloride ion concentration on the surface of the reinforcing steel at depth; The chloride ion concentration on the concrete surface; It is the error function; This is the corrected chloride ion diffusion coefficient; For time.

[0046] Furthermore, before making a lifespan prediction, three key parameters need to be determined: first, the chloride ion concentration on the concrete surface. The concentration of chloride ions on the concrete surface layer is determined by combining the water environment of the sluice gate base with on-site sampling and testing, or by referring to historical monitoring data of similar sluice gates in the same area; secondly, the critical chloride ion concentration is determined. The concentration of chloride ions that triggers depassivation of reinforcing bars is determined by simulating the service environment of the sluice gate bottom slab concrete through indoor material testing, and measuring the chloride ion concentration in the concrete when depassivation of the reinforcing bars begins; thirdly, the thickness of the reinforced concrete protective layer, which takes into account negative construction deviations. The actual distance from the steel bar to the concrete surface is obtained through on-site testing, and then the thickness negative deviation that may occur during construction is taken into account.

[0047] The corrected chloride ion diffusion coefficient Chloride ion concentration on concrete surface and the thickness of the reinforced concrete cover included in the negative deviation of construction Input the chloride ion diffusion model, and calculate the depth corresponding to the concrete cover thickness on the steel reinforcement surface using the model. The change of chloride ion concentration over time. Specifically, the criterion for life prediction is: when the chloride ion concentration on the surface of the steel reinforcement reaches the critical chloride ion concentration, i.e. The time t corresponding to this time is the estimated lifespan of the steel-concrete composite structure of the sluice gate bottom slab. This time is the service life when the component reaches its durability limit state and the steel bars begin to corrode, which can provide a scientific basis for subsequent maintenance decisions.

[0048] Example 2: Please see Figure 2 This illustrates a life prediction system for reinforced concrete components of a sluice gate base slab provided by an embodiment of the present invention. The system includes: The acquisition module 20 is used to acquire the chloride ion reference diffusion coefficient of the concrete bottom plate of the sluice gate, perform acoustic wave monitoring on the concrete bottom plate of the sluice gate, and acquire the ultrasonic wave propagation time and ultrasonic wave amplitude at multiple measurement points.

[0049] The crack area ratio calculation module 21 is used to calculate the crack area ratio of the first preset surface of the concrete of the sluice gate bottom plate based on the ultrasonic wave propagation time and the ultrasonic wave amplitude.

[0050] The crack depth ratio calculation module 22 is used to calculate the crack depth ratio based on the acoustic monitoring data of the second and third preset surfaces of the concrete of the sluice gate bottom plate.

[0051] The correction module 23 is used to calculate the crack volume ratio by combining the crack area ratio and the crack depth ratio, and to correct the chloride ion reference diffusion coefficient based on the crack volume ratio to obtain the corrected chloride ion diffusion coefficient.

[0052] The estimation module 24 is used to substitute the corrected chloride ion diffusion coefficient into the preset chloride ion diffusion model to estimate the life of the steel-concrete components of the sluice gate bottom plate.

[0053] Alternatively, the transmission medium may be a wired link, such as, but not limited to, coaxial cable, fiber optic cable and digital subscriber line, or a wireless link, such as, but not limited to, wireless Fidelity (WIFI), Bluetooth and mobile device networks.

[0054] It should be noted that the device provided in the above embodiments is only an example of the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device can be divided into different functional modules to complete all or part of the functions described above.

[0055] Figure 3 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. For example, as shown... Figure 3 As shown, the computer device 30 includes: a memory 31, a processor 32, and a computer program 33 stored in the memory 31 and running on the processor 32, wherein when the processor 32 executes the computer program 33, the computer device can execute any of the aforementioned methods for estimating the life of steel-concrete components for sluice gate bottom slabs.

[0056] Furthermore, embodiments of the present invention also protect an apparatus that may include a memory and a processor, wherein the memory stores executable program code, and the processor is used to call and execute the executable program code to perform a method for estimating the life of a steel-concrete composite structure for a sluice gate bottom slab provided in the embodiments of the present invention.

[0057] In this embodiment of the invention, the device can be divided into functional modules according to the above method example. For example, each module can correspond to a separate function, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware. It should be noted that the module division in this embodiment is illustrative and is only a logical functional division. In actual implementation, there may be other division methods.

[0058] It should be understood that the apparatus provided in this embodiment of the invention is used to perform the above-described method for estimating the lifespan of a steel-concrete composite structure at the bottom of a sluice gate, and thus can achieve the same effect as the above-described implementation method.

[0059] When using integrated units, the device may include a processing module and a storage module. When applied to a device, the processing module can be used to control and manage the device's operations. The storage module can be used to support the device in executing program code, etc. The processing module may be a processor or a controller, which can implement or execute various exemplary logic blocks, modules, and circuits as described in this disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of Digital Signal Processing (DSP) and a microprocessor, etc., and the storage module may be a memory.

[0060] In addition, the device provided in the embodiments of the present invention may specifically be a chip, component or module. The chip may include a connected processor and a memory. The memory is used to store instructions. When the processor calls and executes the instructions, the chip can execute the life prediction method for the steel-concrete structure of the sluice gate bottom plate provided in the above embodiments.

[0061] This invention also provides a computer-readable storage medium storing computer program code. When the computer program code is run on a computer, the computer executes the aforementioned method steps to implement the life prediction method for steel-concrete composite sluice gate bottom slabs provided in the above embodiments.

[0062] This invention also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned steps to achieve the life prediction method for steel-concrete components of a sluice gate bottom slab provided in the above embodiments.

[0063] In this invention, the apparatus, computer-readable storage medium, computer program product, or chip provided in the embodiments are all used to execute the corresponding methods described above. Therefore, the beneficial effects they achieve can be referred to the beneficial effects in the corresponding methods described above, and will not be repeated here. Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In the embodiments provided by this invention, it should be understood that the disclosed apparatus and method can be implemented in other ways.

[0064] The device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0065] It should also be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0066] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0067] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0068] The above content is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. A method for predicting the service life of reinforced concrete components in the bottom slab of a sluice gate, characterized in that, The method includes the following steps: The chloride ion reference diffusion coefficient of the concrete bottom plate of the sluice gate was obtained, and the ultrasonic wave was monitored by sound wave to obtain the ultrasonic wave propagation time and ultrasonic wave amplitude at multiple measurement points. Based on the ultrasonic wave propagation time and the amplitude of the first wave of the ultrasonic wave, the proportion of crack area on the first preset surface of the concrete of the sluice gate bottom plate is calculated. Based on the acoustic monitoring data of the second and third preset surfaces of the concrete bottom slab of the sluice gate, the proportion of crack depth was calculated. By combining the crack area ratio and the crack depth ratio, the crack volume ratio is calculated, and the chloride ion reference diffusion coefficient is corrected based on the crack volume ratio to obtain the corrected chloride ion diffusion coefficient. By substituting the corrected chloride ion diffusion coefficient into the preset chloride ion diffusion model, the lifespan of the steel-concrete components of the sluice gate bottom plate can be predicted.

2. The method for estimating the lifespan of a reinforced concrete component for a sluice gate bottom slab according to claim 1, characterized in that, The process of obtaining the chloride ion reference diffusion coefficient of the sluice gate bottom slab concrete includes: Standard concrete test blocks were collected simultaneously during the construction of the steel-concrete components of the sluice gate bottom slab. The standard concrete specimens were tested using a rapid chloride ion migration method. The chloride ion reference diffusion coefficient of the sluice gate bottom slab concrete was directly determined by the results of the rapid chloride ion migration method.

3. The method for estimating the lifespan of a reinforced concrete component for a sluice gate bottom slab according to claim 1, characterized in that, The acoustic monitoring of the concrete bottom slab of the sluice gate, acquiring the ultrasonic propagation time and initial wave amplitude at multiple measurement points, includes: The top surface and two sides facing different directions of the concrete bottom slab of the sluice gate are designated as three pre-designed surfaces. A two-dimensional measurement grid is formed by drawing grid lines at preset intervals on three preset surfaces, and the grid nodes are used as measurement points. The ultrasonic propagation time and the amplitude of the first wave of the ultrasonic wave are detected at each measurement point using a preset transducer.

4. The method for estimating the lifespan of a reinforced concrete component for a sluice gate bottom slab according to claim 3, characterized in that, The calculation of the crack area ratio of the first preset surface of the sluice gate bottom slab concrete based on the ultrasonic wave propagation time and the amplitude of the first ultrasonic wave includes: The top surface of the concrete bottom slab of the sluice gate is designated as the first preset surface; Extract the ultrasonic propagation time and the amplitude of the first ultrasonic wave at all measurement points on the first preset surface; The suspected crack rate of each measurement point is determined based on the ultrasonic wave propagation time and the amplitude of the first ultrasonic wave at each measurement point. The suspected crack rate of all measurement points on the first preset surface is statistically analyzed, the arithmetic mean of all suspected crack rates is calculated, and the arithmetic mean is determined as the crack area ratio of the first preset surface.

5. The method for estimating the lifespan of a reinforced concrete component for a sluice gate bottom slab according to claim 4, characterized in that, The calculation of the crack depth ratio based on the acoustic monitoring data of the second and third preset surfaces of the sluice gate bottom slab concrete includes: The two sides of the concrete bottom slab of the sluice gate with different orientations are set as the second preset surface and the third preset surface, respectively. The crack area ratio of the second preset surface and the crack area ratio of the third preset surface are calculated respectively. Determine the reliability of the crack depth ratio of the second preset surface and the reliability of the crack depth ratio of the third preset surface; Based on the crack area ratio of the second preset surface and the crack area ratio of the third preset surface, as well as the reliability of the crack depth ratio of the second preset surface and the reliability of the crack depth ratio of the third preset surface, the crack depth ratio of the sluice gate bottom slab concrete is calculated.

6. The method for estimating the lifespan of a reinforced concrete component for a sluice gate bottom slab according to claim 5, characterized in that, Determining the reliability of the crack depth ratio of the second preset surface and the reliability of the crack depth ratio of the third preset surface includes: The edge length between the second preset surface and the third preset surface, and the edge length between the second preset surface and the first preset surface are measured. The reliability of the crack depth ratio of the second preset surface is determined by the ratio of the two edge lengths. The edge length between the third preset surface and the second preset surface, and the edge length between the third preset surface and the first preset surface are measured. The reliability of the crack depth ratio of the third preset surface is determined by the ratio of the two edge lengths.

7. The method for estimating the lifespan of a reinforced concrete component at the bottom of a sluice gate according to claim 1, characterized in that, The calculation of the crack volume ratio by combining the crack area ratio and the crack depth ratio includes: Determine the proportion of the crack area on the first preset surface; Determine the proportion of crack depth obtained from acoustic monitoring data based on the second preset surface and the third preset surface; The volume ratio of cracks in the concrete of the sluice gate bottom slab is determined based on the ratio of crack area and the ratio of crack depth.

8. The method for estimating the lifespan of a reinforced concrete component at the bottom of a sluice gate according to claim 1, characterized in that, The process of correcting the chloride ion baseline diffusion coefficient based on the crack volume ratio to obtain the corrected chloride ion diffusion coefficient includes: Construct representative volumetric units containing cracks and concrete substrates; It is clear that chloride ions are transported along two parallel paths within the representative volume unit: the crack path and the matrix path. By combining the fracture volume ratio, the chloride ion baseline diffusion coefficient, and the chloride ion diffusion coefficient along the fracture path, the chloride ion baseline diffusion coefficient is corrected through comprehensive calculation to obtain the corrected chloride ion diffusion coefficient.

9. The method for estimating the lifespan of a reinforced concrete component for a sluice gate bottom slab according to claim 1, characterized in that, The step of substituting the corrected chloride ion diffusion coefficient into a preset chloride ion diffusion model to estimate the lifespan of the reinforced concrete components of the sluice gate bottom slab includes: Substitute the corrected chloride ion diffusion coefficient into the chloride ion diffusion model based on Fick's second law; Determine the chloride ion concentration on the concrete surface and the thickness of the reinforced concrete protective layer that takes into account construction negative deviations, and input the chloride ion concentration and the thickness of the reinforced concrete protective layer into the chloride ion diffusion model to output the chloride ion concentration on the steel surface; The time required for the chloride ion concentration on the surface of the reinforcing steel to reach the critical chloride ion concentration is determined, and this time is defined as the estimated lifespan of the steel-concrete composite structure at the bottom of the sluice gate.

10. A life prediction system for reinforced concrete components of a sluice gate bottom slab, characterized in that, The system includes the following modules: The acquisition module is used to obtain the chloride ion reference diffusion coefficient of the concrete bottom plate of the sluice gate, perform acoustic wave monitoring on the concrete bottom plate of the sluice gate, and obtain the ultrasonic wave propagation time and ultrasonic wave amplitude at multiple measurement points. The crack area ratio calculation module is used to calculate the crack area ratio of the first preset surface of the concrete of the sluice gate bottom plate based on the ultrasonic wave propagation time and the ultrasonic wave amplitude. The crack depth ratio calculation module is used to calculate the crack depth ratio based on the acoustic monitoring data of the second and third preset surfaces of the concrete of the sluice gate bottom slab. The correction module is used to calculate the crack volume ratio by combining the crack area ratio and the crack depth ratio, and to correct the chloride ion reference diffusion coefficient based on the crack volume ratio to obtain the corrected chloride ion diffusion coefficient. The prediction module is used to substitute the corrected chloride ion diffusion coefficient into the preset chloride ion diffusion model to predict the life of the steel-concrete components of the sluice gate bottom plate.

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