Port concrete structure life prediction method based on chloride ion concentration monitoring

Abstract

The invention relates to the technical field of life prediction, and discloses a port concrete structure life prediction method based on chloride ion concentration monitoring, and the method comprises the steps: taking a key part of an existing concrete structure as an initial erosion part, carrying out the three-dimensional modeling, obtaining all coordinate positions, and calculating a comprehensive evaluation value of the initial erosion part; and determining a main erosion part by combining a first threshold value, setting a plurality of monitoring points at the main erosion part and determining three-dimensional coordinates of the monitoring points, checking the three-dimensional coordinates, reserving the monitoring points passing the checking as distributed monitoring points, and rejecting the monitoring points not passing the checking. According to the method, the scientificity and the accuracy of monitoring point arrangement are improved, and the problem of insufficient data representativeness caused by improper selection of the monitoring points can be effectively avoided. By accurately identifying and evaluating the main erosion part, potential erosion risks can be found earlier, and prevention and maintenance measures can be taken in time, so that the service life of the concrete structure is remarkably prolonged, and the safety of the concrete structure is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of life prediction, and in particular to a method for predicting the life of a port concrete structure based on chloride ion concentration monitoring. Background Art

[0002] Port infrastructure is an important transportation guarantee for economic and social development. Accurate perception and reliable maintenance are the fundamental to ensure and extend the service life of facilities, and are also the most important prerequisite for improving operational safety. In view of the problem that chloride ion corrosion causes the structural performance of facilities to decline and the service life to be reduced, the array-type chloride ion sensor can timely, effectively and accurately perceive the damage and deterioration of relevant parts, and carry out targeted repairs and reinforcement to extend the service life of facilities. Chloride ion erosion is one of the main causes of the deterioration of reinforced concrete structures. When the chloride ion concentration in concrete exceeds a certain critical value, it will destroy the passivation film on the surface of the steel bar and cause the steel bar to corrode. This process not only reduces the bearing capacity of the steel bar, but may also cause cracks in the concrete structure, further accelerating the corrosion process. Therefore, controlling and monitoring the concentration of chloride ions in concrete is crucial to preventing steel bar corrosion.

[0003] At present, the life prediction method of concrete structures based on chloride ion concentration monitoring mainly includes the following steps: monitoring point layout, monitoring equipment, data acquisition and processing, modeling and prediction; according to the collected data, the diffusion behavior of chloride ions in concrete is analyzed. It helps to predict the time required for chloride ions to reach the critical concentration of steel bars, thereby evaluating the remaining life of the structure. Although the existing life prediction methods of concrete structures have made certain progress, there are limitations in the selection of monitoring points. The current selection of monitoring points mainly relies on empirical judgment and lacks systematic theoretical support. The data of monitoring points at different locations may vary greatly, making it difficult to fully reflect the status of the entire structure. For example, some areas may be more susceptible to chloride ion erosion, while other areas are relatively stable. If the monitoring points are not selected properly, the monitoring data may be insufficiently representative, thus affecting the accuracy of life prediction. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for predicting the life of a port concrete structure based on chloride ion concentration monitoring, comprising: Step 1, deploying a number of monitoring points at the main erosion locations of the concrete structure; Step 11, three-dimensional modeling of the concrete structure is performed through a three-dimensional model to obtain a three-dimensional geometric shape and size of the concrete structure; and an initial erosion position is determined according to the three-dimensional geometric shape and size of the concrete structure; Step 12, obtaining all coordinate positions of the initial erosion parts through the three-dimensional model, and calculating the comprehensive evaluation value of the initial erosion parts based on each coordinate position; constructing a first threshold, determining the initial erosion parts corresponding to the comprehensive evaluation values ​​greater than the first threshold as the main erosion parts; and eliminating the initial erosion parts corresponding to the comprehensive evaluation values ​​less than or equal to the first threshold; Step 13, setting a number of monitoring points at the main erosion site and determining the three-dimensional coordinates of the monitoring points; Step 14, verifying the three-dimensional coordinates to obtain the verified three-dimensional coordinates, and determining the monitoring points corresponding to the verified three-dimensional coordinates as the deployment monitoring points; Step 2, collecting the chloride ion concentration of the monitoring points through an array-type chloride ion sensing sensor; Step 3, pre-treating the monitored chloride ion concentration; Step 4: Based on the chloride ion concentration after pretreatment, the diffusion behavior of chloride ions in the concrete structure is analyzed, and the remaining life of the concrete structure is evaluated and a life prediction report is generated.

[0005] Furthermore, a comprehensive evaluation value of the initial erosion location is calculated based on each coordinate position, including: Step 121, obtaining the chloride ion concentration at each coordinate position; Step 122, obtaining the distance between each coordinate position and the sea level; Step 123, obtaining the curvature of each coordinate position; Step 124, obtaining the thickness of the concrete cover at each coordinate position; Step 125, based on the chloride ion concentration at each coordinate position, the distance between each coordinate position and the sea level, the curvature at each coordinate position, and the thickness of the concrete cover at each coordinate position, a mathematical model is constructed to calculate a comprehensive evaluation value.

[0006] Furthermore, the three-dimensional coordinates are verified, including: Step 141, selecting a number of adjacent monitoring points near each monitoring point to obtain adjacent three-dimensional coordinates of the adjacent monitoring points; Step 142, calculating the average coordinate value of adjacent three-dimensional coordinates; Step 143, calculating the deviation between the three-dimensional coordinates of each monitoring point and the average coordinate value; Step 144, construct a second threshold value. When the deviation value between the coordinates of the current monitoring point in any direction and the average coordinate value is greater than the second threshold value, it means that the current monitoring point verification has failed and the current monitoring point will be eliminated; when the deviation value between the coordinates of the current monitoring point in any direction and the average coordinate value is less than or equal to the second threshold value, it means that the current monitoring point verification has passed and the current monitoring point will be retained.

[0007] Furthermore, the mathematical model is: ; In the formula, Represents the kth coordinate position of the initial erosion site The comprehensive evaluation value of Represents the kth coordinate position of the initial erosion site The distance from sea level s, Represents the kth coordinate position of the initial erosion site The curvature of Represents the kth coordinate position of the initial erosion site Thickness of concrete cover, , , Represent the weight coefficients respectively.

[0008] Furthermore, a surface function is constructed based on the coordinate position of the initial erosion site, and the kth coordinate position of the surface function at the initial erosion site is calculated. The partial derivative of is used to obtain the gradient vector, and the gradient length is obtained according to the gradient vector; the kth coordinate position of the surface function at the initial erosion site is calculated The Laplace operator is used to obtain the kth coordinate position of the initial erosion part according to the gradient length and the Laplace operator. The curvature.

[0009] Furthermore, the curvature is calculated as: ; In the formula, represents the Laplace operator, Represents the kth coordinate position of the surface function f at the initial erosion site The partial derivative of gets the gradient vector, Represents the length of the gradient vector.

[0010] Furthermore, the formula for calculating the average coordinate value of adjacent three-dimensional coordinates is: ; In the formula, Represents the average coordinate value of the x-coordinates of all neighboring monitoring points in the x-direction, Represents the average coordinate value of the y coordinates of all neighboring monitoring points in the y direction, Represents the average coordinate value of the z coordinates of all neighboring monitoring points in the z direction, represents the x-coordinate value of the ith neighboring monitoring point, represents the y coordinate value of the i-th neighboring monitoring point, represents the z-coordinate value of the ith neighboring monitoring point, and n represents the maximum number of neighboring monitoring points.

[0011] Furthermore, the formula for the deviation value is: ; ; ; In the formula, Represents the three-dimensional coordinates of each monitoring point With the average coordinate value The deviation value of Represents the three-dimensional coordinates of the jth monitoring point.

[0012] The embodiments of the present invention have the following technical effects: The present invention takes the key parts of the existing concrete structure as the initial erosion parts, and obtains all coordinate positions through three-dimensional modeling to calculate the comprehensive evaluation value of the initial erosion parts, determines the main erosion parts in combination with the first threshold value, sets a number of monitoring points at the main erosion parts and determines the three-dimensional coordinates of the monitoring points, verifies the three-dimensional coordinates, retains the monitoring points that pass the verification as the layout monitoring points, and removes the monitoring points that fail to pass the verification. This method not only improves the scientificity and accuracy of the monitoring point arrangement, but also effectively avoids the problem of insufficient data representativeness caused by improper selection of monitoring points. By accurately identifying and evaluating the main erosion parts, potential erosion risks can be discovered earlier, and preventive and maintenance measures can be taken in time, thereby significantly improving the service life and safety of the concrete structure. In addition, the three-dimensional modeling and the calculation method of the comprehensive evaluation value provide reliable basic data for subsequent chloride ion concentration monitoring and life prediction, enhancing the reliability and effectiveness of the entire monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a flow chart of a method for predicting the life of a port concrete structure based on chloride ion concentration monitoring provided by an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a port concrete structure life prediction system based on chloride ion concentration monitoring provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0016] Figure 1 This is a flow chart of a method for predicting the life of a port concrete structure based on chloride ion concentration monitoring provided by an embodiment of the present invention. Figure 1 , including: Step 1: Set up several monitoring points at the main erosion locations of the concrete structure.

[0017] The main corrosion sites refer to the key sites that are preferentially corroded by chloride ions. The key sites may include: dry-wet alternating areas close to sea level, corners and edges of concrete structures, areas with thinner concrete structure layers, areas with dense steel bars or thinner steel bar protective layers.

[0018] Step 11, three-dimensional modeling of the concrete structure is performed through a three-dimensional model to obtain the three-dimensional geometric shape and size of the concrete structure; and the initial erosion position is determined according to the three-dimensional geometric shape and size of the concrete structure.

[0019] Since the key parts include the dry-wet alternating areas close to the sea level, the corners and edges of the concrete structure, the areas with thin concrete structure layers and dense steel bars or thin steel bar protective layers, but the concentration at each position in the key parts is different, this embodiment performs three-dimensional modeling of the concrete structure to obtain detailed information of the concrete structure, thereby providing data support for the subsequent screening of accurate monitoring points.

[0020] Step 12, obtaining all coordinate positions of the initial erosion site through the three-dimensional model, and calculating the comprehensive evaluation value of the initial erosion site based on each coordinate position; constructing a first threshold, determining the initial erosion site corresponding to the comprehensive evaluation value greater than the first threshold as the main erosion site; and eliminating the initial erosion site corresponding to the comprehensive evaluation value less than or equal to the first threshold.

[0021] Step 121, obtaining the chloride ion concentration at each coordinate position.

[0022] Install an electrochemical sensor or resistivity tester at each coordinate position, ensure that the sensor is in close contact with the concrete surface, and collect chloride ion concentration.

[0023] Step 122, obtaining the distance between each coordinate position and the sea level.

[0024] In a three-dimensional model, the position of the sea level is defined. Usually, the position of the sea level can be determined by known geographic coordinates or elevation data. For example, the height z of the sea level is sea Extract the coordinate data of all coordinate positions from the 3D model (x k ,y k , z k ), according to the coordinate data of the coordinate position and the height of the sea level, the distance between each coordinate position and the sea level is obtained: z k .

[0025] Step 123, obtaining the curvature of each coordinate position.

[0026] Construct a surface function based on the coordinate position of the initial erosion site, and calculate the kth coordinate position of the surface function at the initial erosion site The partial derivative of is used to obtain the gradient vector, and the gradient length is obtained according to the gradient vector; the kth coordinate position of the surface function at the initial erosion site is calculated The Laplace operator is used to obtain the kth coordinate position of the initial erosion part according to the gradient length and the Laplace operator. The curvature.

[0027] Curvature describes the local curvature at a point on a surface.

[0028] ; In the formula, represents the Laplace operator, Represents the kth coordinate position of the surface function f at the initial erosion site The partial derivative of gets the gradient vector, Represents the length of the gradient vector.

[0029] Furthermore, the surface function is ; x, y are coordinates on the two-dimensional plane, z is the coordinate perpendicular to the xy plane, indicating the surface This function describes how the height z of each point on the surface changes as x and y change.

[0030] Coordinate position of the surface function f at the initial erosion site The partial derivative of gets the gradient vector. The gradient vector It means that the function f The rate of change at .

[0031] ; Represents the function f at the coordinate point The rate of change in the x direction, Represents the function f at the coordinate point The rate of change in the y direction.

[0032] The length (or norm) of the gradient vector indicates the magnitude of the gradient vector: .

[0033] The Laplace operator represents the surface function f in The sum of the second-order derivatives at : .

[0034] By calculating the curvature, this embodiment can quantify the geometric features of the concrete structure surface, capture local details, scientifically and rationally arrange monitoring points, reduce redundancy, discover potential erosion risk areas early, take preventive measures in advance, reduce the maintenance cost of the structure and extend its service life. At the same time, through the calculation of the comprehensive evaluation value, it provides comprehensive data support for decision-making, optimizes resource allocation, and improves the overall risk management level.

[0035] Step 124, obtaining the thickness of the concrete cover at each coordinate position.

[0036] The three-dimensional geometric shape and size are obtained through the three-dimensional model, which at least includes the thickness of the concrete cover.

[0037] Step 125, based on the chloride ion concentration at each coordinate position, the distance between each coordinate position and the sea level, the curvature at each coordinate position, and the thickness of the concrete cover at each coordinate position, a mathematical model is constructed to calculate a comprehensive evaluation value.

[0038] ; In the formula, Represents the kth coordinate position of the initial erosion site The comprehensive evaluation value of Represents the kth coordinate position of the initial erosion site The distance from sea level s, Represents the kth coordinate position of the initial erosion site The curvature of Represents the kth coordinate position of the initial erosion site Thickness of concrete cover, , , Represent the weight coefficients respectively.

[0039] The first threshold is constructed for the comprehensive evaluation value. Since the comprehensive evaluation value is to screen out the monitoring points that are most susceptible to chloride ion corrosion, for this, the first threshold is to find the critical concentration of chloride ions by analyzing the chloride ion concentration of the historical monitoring points, and the value after the normalization of the critical concentration of chloride ions is used as the first threshold. When the comprehensive evaluation value of the monitoring point is greater than the first threshold, it means that the current monitoring point is very susceptible to chloride ion corrosion so that the chloride ion concentration quickly reaches the critical concentration of chloride ions. The present embodiment considers that the current monitoring point is a deployment monitoring point, and the chloride ion concentration of the deployment monitoring point plays a key role in life prediction. When the comprehensive evaluation value of the monitoring point is less than or equal to the first threshold, it means that it is not easy to be corroded by chloride ions, or it takes a long time to corrode. The present embodiment chooses to remove it because the chloride ion concentration of the monitoring point has a certain discreteness and cannot bring a key role to life prediction.

[0040] Step 13, set a number of monitoring points at the main erosion site and determine the three-dimensional coordinates of the monitoring points. Step 14, verify the three-dimensional coordinates to obtain the verified three-dimensional coordinates, and determine the monitoring points corresponding to the verified three-dimensional coordinates as the deployed monitoring points.

[0041] Step 141 , selecting a number of adjacent monitoring points near each monitoring point to obtain adjacent three-dimensional coordinates of the adjacent monitoring points.

[0042] Step 142, calculating the average coordinate value of adjacent three-dimensional coordinates.

[0043] ; In the formula, Represents the average coordinate value of the x-coordinates of all neighboring monitoring points in the x-direction, Represents the average coordinate value of the y coordinates of all neighboring monitoring points in the y direction, Represents the average coordinate value of the z coordinates of all neighboring monitoring points in the z direction, represents the x-coordinate value of the ith neighboring monitoring point, represents the y coordinate value of the i-th neighboring monitoring point, represents the z-coordinate value of the ith neighboring monitoring point, and n represents the maximum number of neighboring monitoring points.

[0044] Step 143, calculating the deviation between the three-dimensional coordinates of each monitoring point and the average coordinate value; ; ; ; In the formula, Represents the three-dimensional coordinates of each monitoring point With the average coordinate value The deviation value of Represents the three-dimensional coordinates of the jth monitoring point.

[0045] Step 144, construct a second threshold value. When the deviation value between the coordinates of the current monitoring point in any direction and the average coordinate value is greater than the second threshold value, it means that the current monitoring point verification has failed and the current monitoring point will be eliminated; when the deviation value between the coordinates of the current monitoring point in any direction and the average coordinate value is less than or equal to the second threshold value, it means that the current monitoring point verification has passed and the current monitoring point will be retained.

[0046] In order to control the deviation between the coordinate and the average coordinate value within a reasonable range, the second threshold is used for verification. The deviation is controlled within the range of 0.02, so the second threshold is 0.02.

[0047] By selecting several neighboring monitoring points near each monitoring point, calculating the average coordinate value of these neighboring monitoring points, and further calculating the deviation value between the three-dimensional coordinates of each monitoring point and the average coordinate value, abnormal or unreasonable monitoring points can be effectively screened out. After constructing the second threshold, when the deviation value between the coordinates of the current monitoring point in any direction and the average coordinate value is greater than the second threshold, it means that the monitoring point has failed the verification and will be eliminated; conversely, when the deviation value is less than or equal to the second threshold, it means that the monitoring point has passed the verification and will be retained. This screening method can significantly improve the accuracy and reliability of monitoring data, reduce misjudgments caused by abnormal values, and ensure that subsequent erosion risk assessments and life predictions are more scientific and effective. By eliminating abnormal monitoring points, distortion of the overall evaluation results caused by errors in individual data points can be avoided, thereby optimizing the layout of monitoring points and improving the performance and credibility of the overall monitoring system.

[0048] Step 2: Collect the chloride ion concentration of the monitoring points through array-type chloride ion sensing sensors.

[0049] Step 3, pre-treating the monitored chloride ion concentration.

[0050] Step 4: Based on the chloride ion concentration after pretreatment, the diffusion behavior of chloride ions in the concrete structure is analyzed, and the remaining life of the concrete structure is evaluated and a life prediction report is generated.

[0051] Establish a diffusion model of chloride ions in concrete, fit the pretreated chloride ion concentration data with the diffusion model, adjust the model parameters to obtain the best fit, and use the least squares method or other optimization algorithms to minimize the difference between the model prediction value and the actual measurement value. Use the diffusion model to predict the distribution of chloride ion concentration at different time points in the future, and calculate the chloride ion concentration value of each monitoring point at different time points. For each monitoring point, calculate the time required for the chloride ion concentration to reach the critical concentration of chloride ions, and obtain the remaining life of the concrete structure by subtracting the current time from the required time. Use the weighted average method or other statistical methods to comprehensively consider the remaining life of different monitoring points. Obtain the overall remaining life of the concrete structure. Take preventive and repair measures based on the overall remaining life to reduce the corrosion risk of the concrete structure and extend its service life. Exemplarily: increase the number of monitoring points, especially in high-risk areas, conduct regular on-site inspections to promptly detect potential problems, apply anti-corrosion coatings in areas susceptible to erosion, strengthen drainage systems to reduce moisture accumulation, repair areas where erosion has occurred, replace damaged concrete and steel bars, and regularly perform structural maintenance to extend the service life of the structure.

[0052] The life prediction report includes the overall remaining life of the concrete structure, prevention and repair measures, etc.

[0053] like Figure 2 This embodiment also discloses a port concrete structure life prediction system based on chloride ion concentration monitoring, including the following modules: Monitoring point layout module: used to layout several monitoring points at the main erosion parts of the concrete structure; Chloride ion concentration collection module: connected to the monitoring point layout module, used to collect the chloride ion concentration of the deployed monitoring point through the array-type chloride ion sensing sensor; Pretreatment module: connected to the chloride ion concentration acquisition module, used for pretreatment of the monitored chloride ion concentration; Life prediction module: connected with the pretreatment module, it is used to analyze the diffusion behavior of chloride ions in the concrete structure based on the chloride ion concentration after pretreatment, and to evaluate the remaining life of the concrete structure and generate a life prediction report.

[0054] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0055] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring, characterized in that: include: Step 1, deploying a number of monitoring points at the main erosion locations of the concrete structure; Step 11, three-dimensional modeling of the concrete structure is performed through a three-dimensional model to obtain a three-dimensional geometric shape and size of the concrete structure; and an initial erosion position is determined according to the three-dimensional geometric shape and size of the concrete structure; Step 12, obtaining all coordinate positions of the initial erosion site through the three-dimensional model, and calculating the comprehensive evaluation value of the initial erosion site based on each coordinate position; constructing a first threshold, and determining the initial erosion site corresponding to the comprehensive evaluation value greater than the first threshold as the main erosion site; Eliminate the initial erosion parts corresponding to the comprehensive evaluation values ​​that are less than or equal to the first threshold; Step 13, setting a number of monitoring points at the main erosion site and determining the three-dimensional coordinates of the monitoring points; Step 14, verifying the three-dimensional coordinates to obtain the verified three-dimensional coordinates, and determining the monitoring points corresponding to the verified three-dimensional coordinates as the deployment monitoring points; Step 2, collecting the chloride ion concentration of the monitoring points through an array-type chloride ion sensing sensor; Step 3, pre-treating the monitored chloride ion concentration; Step 4: Based on the chloride ion concentration after pretreatment, the diffusion behavior of chloride ions in the concrete structure is analyzed, and the remaining life of the concrete structure is evaluated and a life prediction report is generated.

2. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring according to claim 1, characterized in that: A comprehensive assessment of the initial erosion location is calculated based on each coordinate location, including: Step 121, obtaining the chloride ion concentration at each coordinate position; Step 122, obtaining the distance between each coordinate position and the sea level; Step 123, obtaining the curvature of each coordinate position; Step 124, obtaining the thickness of the concrete cover at each coordinate position; Step 125, based on the chloride ion concentration at each coordinate position, the distance between each coordinate position and the sea level, the curvature at each coordinate position, and the thickness of the concrete cover at each coordinate position, a mathematical model is constructed to calculate a comprehensive evaluation value.

3. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring according to claim 1, characterized in that: Verify the three-dimensional coordinates, including: Step 141, selecting a number of adjacent monitoring points near each monitoring point to obtain adjacent three-dimensional coordinates of the adjacent monitoring points; Step 142, calculating the average coordinate value of adjacent three-dimensional coordinates; Step 143, calculating the deviation between the three-dimensional coordinates of each monitoring point and the average coordinate value; Step 144, construct a second threshold value. When the deviation value between the coordinates of the current monitoring point in any direction and the average coordinate value is greater than the second threshold value, it means that the current monitoring point verification has failed and the current monitoring point will be eliminated; when the deviation value between the coordinates of the current monitoring point in any direction and the average coordinate value is less than or equal to the second threshold value, it means that the current monitoring point verification has passed and the current monitoring point will be retained.

4. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring according to claim 2, characterized in that: The mathematical model is: ； In the formula, Represents the kth coordinate position of the initial erosion site The comprehensive evaluation value of Represents the kth coordinate position of the initial erosion site The distance from sea level s, Represents the kth coordinate position of the initial erosion site The curvature of Represents the kth coordinate position of the initial erosion site Thickness of concrete cover, , , Represent the weight coefficients respectively.

5. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring according to claim 4, characterized in that: Construct a surface function based on the coordinate position of the initial erosion site, and calculate the kth coordinate position of the surface function at the initial erosion site The partial derivative of gets the gradient vector, and the gradient length is obtained according to the gradient vector; Calculate the kth coordinate position of the surface function at the initial erosion location The Laplace operator is used to obtain the kth coordinate position of the initial erosion part according to the gradient length and the Laplace operator. The curvature.

6. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring according to claim 5, characterized in that: The curvature is calculated as: ； In the formula, represents the Laplace operator, Represents the kth coordinate position of the surface function f at the initial erosion site The partial derivative of gets the gradient vector, Represents the length of the gradient vector.

7. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring according to claim 3, characterized in that: The formula for calculating the average coordinate value of adjacent three-dimensional coordinates is: ； In the formula, Represents the average coordinate value of the x-coordinates of all neighboring monitoring points in the x-direction, Represents the average coordinate value of the y coordinates of all neighboring monitoring points in the y direction, Represents the average coordinate value of the z coordinates of all neighboring monitoring points in the z direction, represents the x-coordinate value of the ith neighboring monitoring point, represents the y coordinate value of the i-th neighboring monitoring point, represents the z-coordinate value of the ith neighboring monitoring point, and n represents the maximum number of neighboring monitoring points.

8. A method for predicting the life of a port concrete structure based on chloride ion concentration monitoring according to claim 3, characterized in that: The formula for the deviation value is: ； ； ； In the formula, Represents the three-dimensional coordinates of each monitoring point With the average coordinate value The deviation value of Represents the three-dimensional coordinates of the jth monitoring point.

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