Method, device and electronic equipment for detecting chloride ion corrosion of underground concrete pipeline

Abstract

The present application provides a method, device and electronic device for detecting chloride ion corrosion of underground concrete pipelines, the method comprising: obtaining concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipeline to be tested; constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipeline to be tested; based on the simulation model of the chloride ion corrosion process, according to the current service life of the underground concrete pipeline to be tested, determining the chloride ion corrosion detection result of the underground concrete pipeline to be tested. By constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested, the model can reflect the abnormal diffusion process of chloride ions of the underground concrete pipeline to be tested, thereby obtaining real-time and accurate detection results of the chloride ion corrosion degree of the underground concrete pipeline to be tested, which lays a foundation for improving the timeliness of the repair of the underground concrete pipeline to be tested.

Description

Technical Field

[0001] The present application relates to the field of engineering simulation technology, and in particular to a method, device and electronic equipment for detecting chloride ion corrosion in underground concrete pipelines. Background Art

[0002] Underground concrete pipes are often used to transport rainwater and sewage in cities. Damage to the pipes will waste water resources or cause sewage to spread. At the same time, water bodies will continuously wash away the soil layer, and after the soil is hollowed out, the ground will sink and collapse. Chloride ions are the key ions that affect the corrosion of concrete pipes. The erosion of chloride salts will reduce the durability of concrete structures and cause degradation of structural service performance.

[0003] In the prior art, underground concrete pipes are usually repaired regularly according to the estimated service life of the pipes. However, since the corrosion of chloride ions on underground concrete pipes is affected by many factors, it is currently impossible to accurately detect the degree of chloride ion corrosion of underground concrete pipes, and the accuracy of the estimated service life of the pipes is also low. Therefore, there is an urgent need for a method that can accurately detect the degree of chloride ion corrosion of underground concrete pipes, which is of great significance to improving the timeliness of underground concrete pipe repair. Summary of the invention

[0004] The present application provides a method, device and electronic equipment for detecting chloride ion corrosion of underground concrete pipes, so as to solve the defects of the prior art that the degree of chloride ion corrosion of underground concrete pipes cannot be accurately detected.

[0005] The first aspect of the present application provides a method for detecting chloride ion corrosion in underground concrete pipelines, comprising:

[0006] Obtain the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipe to be tested;

[0007] Constructing a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe;

[0008] Based on the chloride ion corrosion process simulation model and according to the current service life of the underground concrete pipeline to be tested, a chloride ion corrosion detection result of the underground concrete pipeline to be tested is determined.

[0009] Optionally, constructing a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe, comprises:

[0010] Determine an underground concrete pipe sample similar to the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe, and the sewage information inside the pipe;

[0011] Inverting the time-truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested according to the chloride ion corrosion test data of the underground concrete pipeline sample;

[0012] Constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested;

[0013] Among them, the order of the time truncation fractional derivative represents the retention effect of the concrete passivation layer of the underground concrete pipe to be tested on chloride ions, the truncation coefficient represents the attenuation rate of the retention effect of the concrete passivation layer on chloride ions, and the flow parameter represents the chloride ion concentration of the material of the underground concrete pipe to be tested itself.

[0014] Optionally, constructing a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipe to be tested comprises:

[0015] Based on the following expression, a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested is constructed:

[0016]

[0017] Wherein, u represents the chloride ion concentration of the underground concrete pipeline to be tested, x represents the spatial position of the detection point on the underground concrete pipeline to be tested, and t represents the current service life of the underground concrete pipeline to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial time, α represents the order of the time-truncated fractional derivative, λ represents the truncation coefficient, v represents the flow parameter, and D represents the diffusion coefficient.

[0018] Optionally, the determining the chloride ion corrosion detection result of the underground concrete pipe to be tested based on the chloride ion corrosion process simulation model and according to the current service life of the underground concrete pipe to be tested includes:

[0019] Based on the simulation model of chloride ion corrosion process, according to the current service life of the underground concrete pipeline to be tested, determining the chloride ion concentration of each of the detection points of the underground concrete pipeline to be tested;

[0020] Wherein, the chloride ion corrosion detection result includes the chloride ion concentration of each detection point of the underground concrete pipeline to be tested.

[0021] Optionally, also include:

[0022] When the chloride ion corrosion detection result of the underground concrete pipeline to be tested indicates that the chloride ion concentration of several detection points of the underground concrete pipeline to be tested reaches a preset threshold, the chloride ion corrosion rate of the several detection points is determined according to the damage degree information of the several detection points;

[0023] According to the chloride ion corrosion rates of the plurality of detection points, the repair priorities of the detection points are determined.

[0024] Optionally, also include:

[0025] A target maintenance strategy for the underground concrete pipeline to be tested is determined according to the concrete structure information of the underground concrete pipeline to be tested.

[0026] Optionally, the concrete structure information includes the water-cement ratio, saturation and pH value of the concrete;

[0027] The soil information outside the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the soil outside the pipe;

[0028] The sewage information in the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the sewage in the pipe.

[0029] The second aspect of the present application provides an underground concrete pipeline chloride ion corrosion detection device, comprising:

[0030] An acquisition module is used to obtain the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipe to be tested;

[0031] A model building module, used to build a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe;

[0032] The detection module is used to determine the chloride ion corrosion detection result of the underground concrete pipeline to be tested based on the chloride ion corrosion process simulation model and according to the current service life of the underground concrete pipeline to be tested.

[0033] Optionally, the model building module is specifically used to:

[0034] Determine an underground concrete pipe sample similar to the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe, and the sewage information inside the pipe;

[0035] Inverting the time-truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested according to the chloride ion corrosion test data of the underground concrete pipeline sample;

[0036] Constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested;

[0037] Among them, the order of the time truncation fractional derivative represents the retention effect of the concrete passivation layer of the underground concrete pipe to be tested on chloride ions, the truncation coefficient represents the attenuation rate of the retention effect of the concrete passivation layer on chloride ions, and the flow parameter represents the chloride ion concentration of the material of the underground concrete pipe to be tested itself.

[0038] Optionally, the model building module is specifically used to:

[0039] Based on the following expression, a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested is constructed:

[0040]

[0041] Wherein, u represents the chloride ion concentration of the underground concrete pipeline to be tested, x represents the spatial position of the detection point on the underground concrete pipeline to be tested, and t represents the current service life of the underground concrete pipeline to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial time, α represents the order of the time-truncated fractional derivative, λ represents the truncation coefficient, v represents the flow parameter, and D represents the diffusion coefficient.

[0042] Optionally, the detection module is specifically used to:

[0043] Based on the simulation model of chloride ion corrosion process, according to the current service life of the underground concrete pipeline to be tested, determining the chloride ion concentration of each of the detection points of the underground concrete pipeline to be tested;

[0044] Wherein, the chloride ion corrosion detection result includes the chloride ion concentration of each detection point of the underground concrete pipeline to be tested.

[0045] Optionally, the device further comprises:

[0046] A repair module is used to determine the chloride ion corrosion rates of several detection points according to the damage degree information of the several detection points when the chloride ion corrosion detection result of the underground concrete pipe to be tested indicates that the chloride ion concentration of several detection points of the underground concrete pipe to be tested reaches a preset threshold; and determine the repair priority of the detection points according to the chloride ion corrosion rates of the several detection points.

[0047] Optionally, the repair module is further used to:

[0048] A target maintenance strategy for the underground concrete pipeline to be tested is determined according to the concrete structure information of the underground concrete pipeline to be tested.

[0049] Optionally, the concrete structure information includes the water-cement ratio, saturation and pH value of the concrete;

[0050] The soil information outside the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the soil outside the pipe;

[0051] The sewage information in the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the sewage in the pipe.

[0052] A third aspect of the present application provides an electronic device, comprising: at least one processor and a memory;

[0053] The memory stores computer-executable instructions;

[0054] The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method described in the first aspect and various possible designs of the first aspect.

[0055] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions. When a processor executes the computer-executable instructions, the method described in the first aspect and various possible designs of the first aspect are implemented.

[0056] The technical solution of this application has the following advantages:

[0057] The present application provides a method, device and electronic device for detecting chloride ion corrosion of underground concrete pipelines, the method comprising: obtaining concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipeline to be tested; constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipeline to be tested; based on the simulation model of the chloride ion corrosion process, according to the current service life of the underground concrete pipeline to be tested, determining the chloride ion corrosion detection result of the underground concrete pipeline to be tested. The method provided by the above scheme constructs a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested, and the model can reflect the abnormal diffusion process of chloride ions in the underground concrete pipeline to be tested, thereby obtaining real-time and accurate detection results of the chloride ion corrosion degree of the underground concrete pipeline to be tested, which lays a foundation for improving the timeliness of the repair of the underground concrete pipeline to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0059] Figure 1 This is a schematic diagram of the structure of the underground concrete pipeline chloride ion corrosion detection system based on the embodiment of the present application;

[0060] Figure 2 A schematic diagram of a process for detecting chloride ion corrosion in underground concrete pipes provided in an embodiment of the present application;

[0061] Figure 3 A schematic diagram of the structure of an underground concrete pipe to be tested provided in an embodiment of the present application;

[0062] Figure 4 A schematic diagram of the structure of a chloride ion corrosion detection device for underground concrete pipes provided in an embodiment of the present application;

[0063] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0064] The above drawings have shown clear embodiments of the present application, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the following embodiments, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0067] In the prior art, underground concrete pipes are usually repaired regularly according to the estimated service life of the pipes. However, since the corrosion of underground concrete pipes by chloride ions is affected by many factors, it is currently impossible to accurately detect the degree of chloride ion corrosion in underground concrete pipes, and the accuracy of the estimated service life of the pipes is also low. In addition, a large number of experiments have shown that the diffusion of chloride ions in concrete presents an abnormal diffusion phenomenon. At the same time, the alkaline environment of concrete and Ca ions will form a passivation layer inside, slowing down the penetration rate of chloride ions. As chloride ions gradually penetrate, the passivation layer is destroyed, and the chloride ion penetration rate gradually accelerates, which is difficult to describe with the classic convection-diffusion model.

[0068] In view of the above problems, the underground concrete pipeline chloride ion corrosion detection method, device and electronic equipment provided in the embodiments of the present application obtain the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipeline to be tested; according to the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipeline to be tested, a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested is constructed; based on the simulation model of the chloride ion corrosion process, according to the current service life of the underground concrete pipeline to be tested, the chloride ion corrosion detection result of the underground concrete pipeline to be tested is determined. The method provided by the above scheme constructs a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested, and the model can reflect the abnormal diffusion process of chloride ions in the underground concrete pipeline to be tested, thereby obtaining real-time and accurate detection results of the chloride ion corrosion degree of the underground concrete pipeline to be tested, which lays a foundation for improving the timeliness of the repair of the underground concrete pipeline to be tested.

[0069] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0070] First, the structure of the underground concrete pipeline chloride ion corrosion detection system based on this application is described:

[0071] The underground concrete pipeline chloride ion corrosion detection method, device and electronic equipment provided in the embodiments of the present application are suitable for simulating the chloride ion corrosion process of underground concrete pipelines. Figure 1 As shown, it is a schematic diagram of the structure of the underground concrete pipeline chloride ion corrosion detection system based on the embodiment of the present application, which mainly includes an underground concrete pipeline, a data acquisition device and an underground concrete pipeline chloride ion corrosion detection device. Specifically, the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipeline can be collected based on the data acquisition device, and the collected information can be sent to the underground concrete pipeline chloride ion corrosion detection device. The underground concrete pipeline chloride ion corrosion detection device determines the chloride ion corrosion detection result of the underground concrete pipeline under the current service life based on the obtained information.

[0072] The embodiment of the present application provides a method for detecting chloride ion corrosion of underground concrete pipes, which is used to simulate the chloride ion corrosion process of underground concrete pipes. The execution subject of the embodiment of the present application is an electronic device, such as a server, a desktop computer, a laptop computer, a tablet computer, and other electronic devices that can be used to simulate the chloride ion corrosion process of underground concrete pipes.

[0073] like Figure 2 FIG. 1 is a flow chart of a method for detecting chloride ion corrosion in underground concrete pipes provided in an embodiment of the present application, the method comprising:

[0074] Step 201, obtaining the concrete structure information, soil information outside the pipe, and sewage information inside the pipe of the underground concrete pipe to be tested.

[0075] Among them, the concrete structure information includes the water-cement ratio, saturation and pH value of the concrete; the soil information outside the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the soil outside the pipe; the sewage information inside the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the sewage inside the pipe.

[0076] Step 202: construct a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested based on the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe, and the sewage information inside the pipe.

[0077] For example, Figure 3 As shown, it is a structural schematic diagram of the underground concrete pipe to be tested provided in an embodiment of the present application. The underground concrete pipe to be tested is constantly subjected to the combined action of sewage inside the pipe (water pipe) and soil outside the pipe, that is, the chloride ions in the sewage inside the pipe and the soil outside the pipe all penetrate into the underground concrete pipe to be tested.

[0078] Specifically, the chloride ion corrosion process on both sides of the underground concrete pipe to be tested can be determined based on the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe, and then the corresponding chloride ion corrosion process simulation model can be constructed.

[0079] Step 203 , based on the chloride ion corrosion process simulation model and according to the current service life of the underground concrete pipeline to be tested, a chloride ion corrosion detection result of the underground concrete pipeline to be tested is determined.

[0080] Specifically, the current service life of the underground concrete pipe to be tested can be input into the chloride ion corrosion process simulation model. The chloride ion corrosion process simulation model simulates the chloride ion corrosion process of the underground concrete pipe to be tested to obtain the chloride ion corrosion detection result of the underground concrete pipe to be tested under the current service life.

[0081] On the basis of the above embodiments, in order to ensure the reliability of the simulation model of chloride ion corrosion process, as an implementable method, in one embodiment, according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe, the simulation model of chloride ion corrosion process of the underground concrete pipe to be tested is constructed, including:

[0082] Step 2021, determining an underground concrete pipe sample similar to the underground concrete pipe to be tested based on the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe, and the sewage information inside the pipe;

[0083] Step 2022, based on the chloride ion corrosion experimental data of the underground concrete pipe sample, invert the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipe to be tested;

[0084] Step 2023, constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested.

[0085] Among them, the order of the time truncation fractional derivative represents the retention effect of the concrete passivation layer of the underground concrete pipe to be tested on chloride ions, the truncation coefficient represents the attenuation rate of the retention effect of the concrete passivation layer on chloride ions, and the flow parameter represents the chloride ion concentration of the underground concrete pipe material itself to be tested.

[0086] It should be noted that, due to the alkaline environment of concrete and Ca ions, a passivation layer will be formed inside the underground concrete pipe to be tested, which will delay the penetration of chloride ions. The mean square displacement of chloride ion particle migration conforms to the power-law distribution. As chloride ions gradually penetrate, the passivation layer is destroyed, the chloride ion penetration rate gradually accelerates, and the migration process will present a normal distribution. Therefore, the embodiment of the present application constructs a time-truncated fractional-order convection-diffusion model for describing the chloride ion corrosion process of the underground concrete pipe to be tested as a simulation model of the chloride ion corrosion process.

[0087] Specifically, based on a preset fitting algorithm and according to the chloride ion corrosion experimental data of underground concrete pipe samples, the retention effect of the concrete passivation layer on chloride ions and the attenuation rate of the retention effect of the concrete passivation layer on chloride ions and other characteristics can be fitted, and then the order of the time truncated fractional derivative, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipe to be tested can be inverted to obtain.

[0088] Specifically, in one embodiment, a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested can be constructed based on the following expression:

[0089]

[0090] Wherein, u represents the chloride ion concentration of the underground concrete pipe to be tested, x represents the spatial position of the detection point on the underground concrete pipe to be tested, and t represents the current service life of the underground concrete pipe to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial moment, α represents the order of the time-truncated fractional derivative, 0<α<1, the lower the value of α, the stronger the retention effect, λ represents the truncation coefficient, λ≥0, represents the flow parameter, the value is 0 for saturated concrete, and D represents the diffusion coefficient. u(m,t)=1, u(n,t)=2, u(x,0)=0, m represents the outer wall of the underground concrete pipe to be tested that contacts the soil, u1 represents the chloride ion concentration in the soil, n represents the inner wall of the underground concrete pipe to be tested that contacts the sewage, that is, the chloride ion concentration of the inner and outer walls of the underground concrete pipe to be tested can directly take the chloride ion concentration of the soil or sewage, u2 represents the chloride ion concentration in the sewage, and u0 represents the initial chloride ion concentration at the detection point x.

[0091] Among them, the time-truncated fractional derivative of the Caputo type at the initial time is defined as follows:

[0092]

[0093] Among them, Γ(α) is a single-parameter Gamma function, which is defined as follows:

[0094]

[0095] Specifically, in one embodiment, the chloride ion concentration of each detection point of the underground concrete pipeline to be tested may be determined based on the chloride ion corrosion process simulation model and according to the current service life of the underground concrete pipeline to be tested.

[0096] Among them, the chloride ion corrosion test results include the chloride ion concentration of each test point of the underground concrete pipeline to be tested.

[0097] Specifically, after the current service life of the underground concrete pipe to be tested is input into the chloride ion corrosion process simulation model, the model is solved based on the finite difference method to obtain the chloride ion concentration of each detection point under the current service life of the underground concrete pipe to be tested, that is, the distribution of chloride ions in the underground concrete pipe to be tested is obtained.

[0098] Specifically, in one embodiment, when the chloride ion corrosion detection results of the underground concrete pipe to be tested indicate that the chloride ion concentration of several detection points of the underground concrete pipe to be tested reaches a preset threshold, the chloride ion corrosion rates of the several detection points can be determined based on the damage degree information of the several detection points; and the repair priority of the detection points can be determined based on the chloride ion corrosion rates of the several detection points.

[0099] Specifically, an automatic ground resistance monitoring instrument can be installed inside the pipeline to monitor in real time whether the pipeline protective layer is damaged, so as to obtain damage degree information of all detection points of the underground concrete pipeline to be tested. The greater the damage degree of the detection point, the faster its chloride ion corrosion rate, so the detection points with greater damage degree can be repaired first.

[0100] Specifically, in one embodiment, the target maintenance strategy of the underground concrete pipe to be tested may be determined according to the concrete structure information of the underground concrete pipe to be tested.

[0101] Specifically, in the process of maintaining the underground concrete pipeline to be tested, the concrete structure information of the underground concrete pipeline to be tested can be referred to, and by changing its concrete structure information, the target maintenance material (concrete materials with different water-cement ratios and other corrosion-resistant materials) of the underground concrete pipeline to be tested can be determined. The target maintenance strategy includes the target maintenance material, so that the underground concrete pipeline to be tested is minimally affected by chloride ion corrosion, so as to extend the service life of the underground concrete pipeline to be tested. After completing the maintenance work of the underground concrete pipeline to be tested, the chloride ion concentration of the coagulation degree after repair is stored in the database as the new initial concentration, and the maintenance time is used as the initial time to continue to simulate the chloride ion corrosion process of the underground concrete pipeline to be tested.

[0102] The underground concrete pipeline chloride ion corrosion detection method provided in the embodiment of the present application obtains the concrete structure information, the soil information outside the pipe and the sewage information inside the pipe of the underground concrete pipeline to be tested; constructs a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the concrete structure information, the soil information outside the pipe and the sewage information inside the pipe of the underground concrete pipeline to be tested; based on the simulation model of the chloride ion corrosion process, the chloride ion corrosion detection result of the underground concrete pipeline to be tested is determined according to the current service life of the underground concrete pipeline to be tested. The method provided by the above scheme constructs a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested, and the model can reflect the abnormal diffusion process of chloride ions in the underground concrete pipeline to be tested, thereby obtaining real-time and accurate detection results of the chloride ion corrosion degree of the underground concrete pipeline to be tested, which lays a foundation for improving the timeliness of the repair of the underground concrete pipeline to be tested. In addition, a time-truncated fractional-order convection-diffusion model was established as a simulation model of the chloride ion corrosion process to describe the chloride ion corrosion process of underground concrete pipes. The model expression involves fewer parameters and can quickly respond to the degree of chloride ion corrosion. Moreover, the scheme can also timely analyze the repair priority of the detection point and the potential corrosion risk after repair according to the degree of chloride ion corrosion at each detection point.

[0103] An embodiment of the present application provides a device for detecting chloride ion corrosion of underground concrete pipes, which is used to execute the method for detecting chloride ion corrosion of underground concrete pipes provided in the above-mentioned embodiment.

[0104] like Figure 4 , which is a schematic diagram of the structure of the underground concrete pipeline chloride ion corrosion detection device provided in the embodiment of the present application. The underground concrete pipeline chloride ion corrosion detection device 40 comprises: an acquisition module 401, a model building module 402 and a detection module 403.

[0105] Among them, the acquisition module is used to obtain the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipe to be tested; the model construction module is used to construct a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipe to be tested; the detection module is used to determine the chloride ion corrosion detection result of the underground concrete pipe to be tested based on the simulation model of the chloride ion corrosion process and according to the current service life of the underground concrete pipe to be tested.

[0106] Specifically, in one embodiment, the model building module is specifically used to:

[0107] Determine an underground concrete pipe sample similar to the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe;

[0108] According to the chloride ion corrosion experimental data of underground concrete pipe samples, the time truncated fractional derivative order, truncation coefficient, flow parameters and diffusion coefficient of the underground concrete pipe to be tested are inverted;

[0109] According to the time-truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested, a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested is constructed;

[0110] Among them, the order of the time truncation fractional derivative represents the retention effect of the concrete passivation layer of the underground concrete pipe to be tested on chloride ions, the truncation coefficient represents the attenuation rate of the retention effect of the concrete passivation layer on chloride ions, and the flow parameter represents the chloride ion concentration of the underground concrete pipe material itself to be tested.

[0111] Specifically, in one embodiment, the model building module is specifically used to:

[0112] Based on the following expression, a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested is constructed:

[0113]

[0114] Wherein, u represents the chloride ion concentration of the underground concrete pipe to be tested, x represents the spatial position of the detection point on the underground concrete pipe to be tested, and t represents the current service life of the underground concrete pipe to be tested. represents the time-truncated fractional derivative of the Caputo type at the initial time, α represents the order of the time-truncated fractional derivative, λ represents the truncation coefficient, v represents the flow parameter, and D represents the diffusion coefficient.

[0115] Specifically, in one embodiment, the detection module is specifically used to:

[0116] Based on the simulation model of chloride ion corrosion process, the chloride ion concentration of each detection point of the underground concrete pipeline to be tested is determined according to the current service life of the underground concrete pipeline to be tested;

[0117] Among them, the chloride ion corrosion test results include the chloride ion concentration of each test point of the underground concrete pipeline to be tested.

[0118] Specifically, in one embodiment, the device further includes:

[0119] The repair module is used to determine the chloride ion corrosion rate of several detection points according to the damage degree information of several detection points when the chloride ion corrosion detection result of the underground concrete pipe to be tested indicates that the chloride ion concentration of several detection points of the underground concrete pipe to be tested reaches a preset threshold; and determine the repair priority of the detection points according to the chloride ion corrosion rate of several detection points.

[0120] Specifically, in one embodiment, the repair module is further used to:

[0121] According to the concrete structure information of the underground concrete pipeline to be tested, a target maintenance strategy for the underground concrete pipeline to be tested is determined.

[0122] Specifically, in one embodiment, the concrete structure information includes the water-cement ratio, saturation and pH value of the concrete;

[0123] The soil information outside the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the soil outside the pipe;

[0124] The sewage information in the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the sewage in the pipe.

[0125] Regarding the underground concrete pipeline chloride ion corrosion detection device in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0126] The underground concrete pipe chloride ion corrosion detection device provided in the embodiment of the present application is used to execute the underground concrete pipe chloride ion corrosion detection method provided in the above embodiment. Its implementation method and principle are the same and will not be repeated here.

[0127] An embodiment of the present application provides an electronic device for executing the underground concrete pipe chloride ion corrosion detection method provided in the above embodiment.

[0128] like Figure 5 FIG. 5 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 50 includes: at least one processor 51 and a memory 52.

[0129] The memory stores computer-executable instructions; at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the underground concrete pipeline chloride ion corrosion detection method provided in the above embodiment.

[0130] An electronic device provided in an embodiment of the present application is used to execute the underground concrete pipe chloride ion corrosion detection method provided in the above embodiment. Its implementation method and principle are the same and will not be repeated here.

[0131] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the underground concrete pipe chloride ion corrosion detection method provided in any of the above embodiments is implemented.

[0132] The storage medium containing computer executable instructions in the embodiment of the present application can be used to store computer executable instructions of the underground concrete pipe chloride ion corrosion detection method provided in the aforementioned embodiment. Its implementation method and principle are the same and will not be repeated here.

[0133] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0134] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0135] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0136] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0137] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting chloride ion corrosion of underground concrete pipelines, characterized in that: include: Obtain the concrete structure information, soil information outside the pipe, and sewage information inside the pipe of the underground concrete pipe to be tested; Constructing a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe; Based on the chloride ion corrosion process simulation model, according to the current service life of the underground concrete pipeline to be tested, determining the chloride ion corrosion detection result of the underground concrete pipeline to be tested; The method of constructing a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe comprises: Determine an underground concrete pipe sample similar to the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe, and the sewage information inside the pipe; Inverting the time-truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested according to the chloride ion corrosion test data of the underground concrete pipeline sample; Constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested; The order of the time-truncated fractional derivative represents the retention effect of the concrete passivation layer of the underground concrete pipe to be tested on chloride ions, the truncation coefficient represents the attenuation rate of the retention effect of the concrete passivation layer on chloride ions, and the flow parameter represents the chloride ion concentration of the material of the underground concrete pipe to be tested itself; The method of constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested comprises: Based on the following expression, a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested is constructed: in, Indicates the chloride ion concentration of the underground concrete pipe to be tested. Indicates the spatial position of the detection point on the underground concrete pipe to be tested, Indicates the current service life of the underground concrete pipe to be tested, represents the time-truncated fractional derivative of Caputo type at the initial time, represents the order of the time-truncated fractional derivative, represents the cutoff coefficient, represents the flow parameters, represents the diffusion coefficient; The concrete structure information includes the water-cement ratio, saturation and pH value of the concrete; The soil information outside the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the soil outside the pipe; The sewage information in the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the sewage in the pipe.

2. The method according to claim 1, characterized in that The method of determining the chloride ion corrosion detection result of the underground concrete pipeline to be tested based on the chloride ion corrosion process simulation model and according to the current service life of the underground concrete pipeline to be tested includes: Based on the simulation model of chloride ion corrosion process, according to the current service life of the underground concrete pipeline to be tested, determining the chloride ion concentration of each of the detection points of the underground concrete pipeline to be tested; Wherein, the chloride ion corrosion detection result includes the chloride ion concentration of each detection point of the underground concrete pipeline to be tested.

3. The method according to claim 2, characterized in that Also includes: When the chloride ion corrosion detection result of the underground concrete pipeline to be tested indicates that the chloride ion concentration of several detection points of the underground concrete pipeline to be tested reaches a preset threshold, the chloride ion corrosion rate of the several detection points is determined according to the damage degree information of the several detection points; According to the chloride ion corrosion rates of the plurality of detection points, the repair priorities of the detection points are determined.

4. The method according to claim 3, characterized in that Also includes: A target maintenance strategy for the underground concrete pipeline to be tested is determined according to the concrete structure information of the underground concrete pipeline to be tested.

5. A device for detecting chloride ion corrosion of underground concrete pipelines, characterized in that: include: An acquisition module is used to obtain the concrete structure information, soil information outside the pipe and sewage information inside the pipe of the underground concrete pipe to be tested; A model building module, used to build a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe and the sewage information inside the pipe; A detection module, for determining a chloride ion corrosion detection result of the underground concrete pipeline to be tested based on the chloride ion corrosion process simulation model and according to the current service life of the underground concrete pipeline to be tested; The model building module is specifically used for: Determine an underground concrete pipe sample similar to the underground concrete pipe to be tested according to the concrete structure information of the underground concrete pipe to be tested, the soil information outside the pipe, and the sewage information inside the pipe; Inverting the time-truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested according to the chloride ion corrosion test data of the underground concrete pipeline sample; Constructing a simulation model of the chloride ion corrosion process of the underground concrete pipeline to be tested according to the time truncated fractional derivative order, truncation coefficient, flow parameter and diffusion coefficient of the underground concrete pipeline to be tested; The order of the time-truncated fractional derivative represents the retention effect of the concrete passivation layer of the underground concrete pipe to be tested on chloride ions, the truncation coefficient represents the attenuation rate of the retention effect of the concrete passivation layer on chloride ions, and the flow parameter represents the chloride ion concentration of the material of the underground concrete pipe to be tested itself; The model building module is specifically used for: Based on the following expression, a simulation model of the chloride ion corrosion process of the underground concrete pipe to be tested is constructed: in, Indicates the chloride ion concentration of the underground concrete pipe to be tested. Indicates the spatial position of the detection point on the underground concrete pipe to be tested, Indicates the current service life of the underground concrete pipe to be tested, represents the time-truncated fractional derivative of Caputo type at the initial time, represents the order of the time-truncated fractional derivative, represents the cutoff coefficient, represents the flow parameters, represents the diffusion coefficient; The concrete structure information includes the water-cement ratio, saturation and pH value of the concrete; The soil information outside the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the soil outside the pipe; The sewage information in the pipe includes the pH value, temperature, conductivity and chloride ion concentration of the sewage in the pipe.

6. An electronic device, characterized in that: include: at least one processor and memory; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method according to any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when a processor executes the computer-executable instructions, the method according to any one of claims 1 to 4 is implemented.

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