Dam concrete durability evaluation method and system based on scene analysis

Abstract

The invention discloses a dam concrete durability evaluation method and system based on scene analysis, and belongs to the technical field of electronic digital data processing.The method comprises the steps that historical hydrological data of a set period of a drainage basin where a dam is located is collected, and hydrological abnormal conditions are evaluated based on the historical hydrological data; historical defect pictures of a dam concrete set period are collected, and dam concrete defect abnormal conditions are evaluated based on the historical defect pictures; obtaining the abnormal change condition of the dam concrete based on the defect abnormal condition and the hydrological abnormal condition of the dam concrete; deducing the service life of the dam concrete based on the abnormal threshold of the dam concrete defect; evaluating the durability of dam concrete based on the service life; the service life of the dam is deduced through the change rate of the hydrological data and the defect data, the durability of the dam concrete in the set scene is analyzed, the dam can be maintained in time, and the stability of the dam is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic data processing, and in particular relates to a dam concrete durability assessment method and system based on scenario analysis. Background Art

[0002] Concrete dam is a common type of dam, which is mainly made of concrete mixed with cement, sand, gravel and water in a certain proportion. It is used for water storage, power generation, irrigation, flood control and other purposes. Concrete dam is an important part of water conservancy projects and is of great significance for water resources management and utilization. Therefore, it is necessary to conduct regular inspection and maintenance of concrete dams to maintain their stability. The existing technology for evaluating dam concrete mostly obtains the durability of dam concrete by testing concrete matrix samples, but lacks the ability to predict abnormal conditions through the change rate of hydrological data and defect data, and thus cannot deduce the service life of the dam based on the predicted abnormal conditions, resulting in untimely maintenance of dam concrete in different scenarios; In order to solve the above problems, the present invention designs a dam concrete durability assessment method and system based on scenario analysis. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention designs a dam concrete durability assessment method and system based on scenario analysis. The present invention collects historical hydrological data of a set period in the basin where the dam is located, and assesses hydrological anomalies based on the historical hydrological data; collects historical defect images of the dam concrete for a set period, and assesses the dam concrete defect anomalies based on the historical defect images; obtains abnormal changes in the dam concrete based on the dam concrete defect anomalies and hydrological anomalies; derives the service life of the dam concrete based on the dam concrete defect anomaly threshold; and assesses the durability of the dam concrete based on the service life. The present invention derives the service life of the dam through the change rate of hydrological data and defect data, analyzes the durability of the dam concrete under the set scenario, and is helpful to timely maintain the dam and improve the stability and safety of the dam.

[0004] To achieve the above object, the present invention provides the following technical solutions: The dam concrete durability assessment method based on scenario analysis includes the following specific steps: S1. Collect historical hydrological data of the set period in the basin where the dam is located, and evaluate hydrological anomalies based on the historical hydrological data; S2. Collect historical defect images of the dam concrete at a set period, and evaluate the abnormal defect conditions of the dam concrete based on the historical defect images; S3, obtaining abnormal changes of dam concrete based on abnormal defects of dam concrete and abnormal hydrological conditions; S4. Derivation of the service life of dam concrete based on the abnormal threshold of dam concrete defects; S5. Evaluate the durability of dam concrete based on service life.

[0005] Preferably, S1 comprises the following specific steps: S11, collecting historical hydrological data of a set period in the river basin where the dam is located, wherein the historical hydrological data includes historical water levels and historical water flow velocities; S12, inputting historical hydrological data into a hydrological anomaly value calculation formula to calculate the hydrological anomaly value, the hydrological anomaly value calculation formula is: ; in, is the hydrological anomaly value, is the water velocity anomaly ratio, is the water level anomaly ratio, , is the historical water flow velocity collected at the uth time, is the abnormal water velocity threshold, is the number of times historical hydrological data were collected, is the historical water level collected for the u-1th time, when ,Right now for hour, The value is 0. is the historical water level collected at the uth time, is the height difference between the historical water level collected at the uth time and the historical water level collected at the u-1th time, is the time difference between the u-th acquisition and the u-1-th acquisition, is the abnormal water level change threshold.

[0006] Preferably, S2 comprises the following specific steps: S21, collecting historical defect images of the dam concrete during a set period, the historical defect images including historical crack images and historical depression images, pre-processing the historical crack images and historical depression images to obtain crack data and depression data, the crack data including crack area and crack spacing, and the depression data including depression distance; S22, inputting the crack data into a crack abnormal value calculation formula to calculate the crack abnormal value, wherein the crack abnormal value calculation formula is: ; in, is the crack outlier value, is the crack area abnormality ratio coefficient, is the crack distance anomaly ratio coefficient, , is the area of ​​the qth crack collected in the gth time, is the area of ​​the qth crack collected at the g-1th time, is the time of collecting the qth crack area for the gth time, is the time for collecting the qth crack area for the g-1th time, is the number of cracks collected, is the abnormal threshold of crack area change, is the number of defect images collected, is the i-th crack spacing collected in the g-th time, is the i-th crack spacing collected at the g-1th time, is the time of collecting the i-th crack spacing for the g-th time, is the time of collecting the i-th crack spacing for the g-1th time, is the number of crack spacings collected, is the abnormal threshold of crack spacing change; S23, inputting the concave data into a concave abnormal value calculation formula to calculate the concave abnormal value, the concave abnormal value calculation formula is: ; in, is a concave outlier, is the distance of the nth depression collected in the gth time, is the distance of the nth depression collected at the g-1th time, is the time of collecting the nth depression spacing for the gth time, is the time for collecting the nth depression spacing for the g-1th time, is the abnormal threshold of depression distance change, is the number of collected depression distances; S24, inputting the crack abnormal value and the depression abnormal value into the dam concrete defect abnormal value calculation formula to calculate the dam concrete defect abnormal value, the dam concrete defect abnormal value calculation formula is: ; in, is the abnormal value of dam concrete defects, is the crack anomaly ratio coefficient, is the depression anomaly ratio coefficient, .

[0007] Preferably, S3 comprises the following specific steps: The abnormal change rate of dam concrete is obtained according to the abnormal value of dam concrete defects and the abnormal value of hydrology. The expression of the abnormal change rate of dam concrete is: ; Wherein, Tm is the set cycle length.

[0008] Preferably, S4 comprises the following specific steps: The abnormal threshold of dam concrete defect is input into the service life calculation formula of dam concrete to calculate the service life of dam concrete. The service life calculation formula of dam concrete is: ; in, is the service life of dam concrete, and Flam is the abnormal threshold of dam concrete defects.

[0009] Preferably, S5 comprises the following specific steps: The service life of the dam concrete is compared with the preset service life threshold. If the service life of the dam is greater than or equal to the service life threshold, it is judged that there is no risk in the dam concrete; if the service life of the dam is less than the service life threshold, it is judged that there is a risk in the dam concrete and a durability alarm is triggered.

[0010] A dam concrete durability evaluation system based on scenario analysis is used to implement a dam concrete durability evaluation method based on scenario analysis, including a control module, a hydrological data acquisition module, a hydrological anomaly evaluation module, a defect image acquisition module, a defect anomaly evaluation module, a dam abnormal change calculation module, a service life evaluation module and a durability evaluation module; Preferably, the hydrological data collection module is used to collect historical water levels and historical water flow velocities in the basin where the dam is located; The hydrological anomaly assessment module is used to input historical hydrological data of a set period into a hydrological anomaly value calculation formula to calculate the hydrological anomaly value; The defect image acquisition module is used to collect historical defect images of dam concrete, obtain crack area and crack spacing after preprocessing crack images, and obtain depression distance after preprocessing depression images; The defect anomaly assessment module is used to input crack data into a crack anomaly value calculation formula to calculate crack anomaly values, input depression data into a depression anomaly value calculation formula to calculate depression anomaly values, and input crack anomaly values ​​and depression anomaly values ​​into a dam concrete defect anomaly value calculation formula to calculate dam concrete defect anomaly values; The dam abnormal change calculation module is used to obtain the dam concrete abnormal change rate according to the dam concrete defect abnormal value and the hydrological abnormal value; The service life assessment module is used to input the abnormal threshold of dam concrete defects into the dam concrete service life calculation formula to calculate the service life of the dam concrete; The durability assessment module is used to compare the service life of the dam concrete with a preset service life threshold to assess the durability of the dam concrete; Preferably, the control module is used to control the operation of the hydrological data acquisition module, the hydrological anomaly assessment module, the defect image acquisition module, the defect anomaly assessment module, the dam abnormal change calculation module, the service life assessment module and the durability assessment module.

[0011] The technical solution provided by the present invention has the following effects: The present invention collects historical hydrological data of a set period in the basin where the dam is located, and evaluates hydrological anomalies based on the historical hydrological data; collects historical defect images of the dam concrete in a set period, and evaluates the abnormal defects of the dam concrete based on the historical defect images; obtains abnormal changes in the dam concrete based on the abnormal defects of the dam concrete and the hydrological anomalies; derives the service life of the dam concrete based on the abnormal defect threshold of the dam concrete; and evaluates the durability of the dam concrete based on the service life. The present invention derives the service life of the dam through the change rate of the hydrological data and the defect data, analyzes the durability of the dam concrete under the set scenario, and is helpful to timely maintain the dam and improve the stability and safety of the dam. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the flow of the dam concrete durability assessment method based on scenario analysis of the present invention; Figure 2 A schematic diagram of a method for obtaining a crack area according to the present invention; Figure 3 A schematic diagram of a method for obtaining crack spacing according to the present invention; Figure 4 It is a schematic diagram of the overall framework of the dam concrete durability assessment system based on scenario analysis of the present invention. DETAILED DESCRIPTION

[0014] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 belong to the scope of protection of the present invention. Example 1

[0015] See also Figure 1 , an embodiment provided by the present invention: The dam concrete durability assessment method based on scenario analysis includes the following specific steps: S1. Collect historical hydrological data of the set period in the basin where the dam is located, and evaluate hydrological anomalies based on the historical hydrological data; In this embodiment, S1 includes the following specific steps: S11. Collect historical hydrological data of a set period in the basin where the dam is located, including historical water levels and historical water flow velocities; Specifically, the historical water level and historical water flow velocity are obtained through the hydrological database, wherein the steps of storing the water level data are: turning on the water level meter at the set monitoring point, synchronizing the water level data with the timestamp, recording the real-time water level data, and storing the collected water level data in the hydrological database; The steps for storing water flow data are as follows: using a current meter to measure the real-time velocity of water flow at a set monitoring point, synchronizing the water flow velocity data with a timestamp, measuring at different depths and locations of the water body to obtain the average water flow velocity, and storing the collected water flow data in a hydrological database; The collected data is transmitted to the monitoring center via wired or wireless means, and the data is checked for abnormal values ​​and errors and cleaned.

[0016] S12. Input the historical hydrological data into the hydrological anomaly value calculation formula to calculate the hydrological anomaly value. The hydrological anomaly value calculation formula is: ; in, is the hydrological anomaly value, is the water velocity anomaly ratio, is the water level anomaly ratio, , is the historical water flow velocity collected at the uth time, is the abnormal water velocity threshold, is the number of times historical hydrological data were collected, is the historical water level collected for the u-1th time, when ,Right now for hour, The value is 0. is the historical water level collected at the uth time, is the height difference between the historical water level collected at the uth time and the historical water level collected at the u-1th time, is the time difference between the u-th acquisition and the u-1-th acquisition, is the abnormal water level change threshold.

[0017] Specifically, the impact of water level changes on dam concrete is as follows: water level changes will cause the concrete structure to undergo periodic dry-wet cycles, thereby accelerating the hydration and corrosion process inside the concrete. After water enters the pores of the concrete, it freezes as the temperature changes, and the volume expansion will cause stress on the concrete structure, causing the expansion of microcracks, thereby reducing the integrity of the concrete; Rising and falling water levels also expose concrete to alternating exposure to air and water, which accelerates chemical attack processes such as carbonation and sulfate attack, which can reduce the concrete's alkaline protective layer and cause corrosion of steel reinforcement; The impact of water flow velocity on dam concrete is as follows: high-speed water flow has a scouring effect on the concrete on the dam surface, causing wear and erosion of the surface material, especially in rapids areas or during flood discharge. Cavitation may occur in water flow in high-velocity areas, and the bubbles formed will collapse instantly when they hit the concrete surface. The high pressure generated can cause damage to the concrete, and the suspended particles and dissolved substances in the water flow may corrode the concrete surface. Especially when the water flow velocity is faster, this erosion will be more significant.

[0018] S2. Collect historical defect images of the dam concrete at a set period, and evaluate the abnormal defect conditions of the dam concrete based on the historical defect images; In this embodiment, S2 includes the following specific steps: S21, collecting historical defect images of the dam concrete at a set period, the historical defect images including historical crack images and historical depression images, pre-processing the historical crack images and historical depression images to obtain crack data and depression data, the crack data including crack area and crack spacing, and the depression data including depression distance; Specifically, the images of dam concrete defects are collected by demarcating the area of ​​the dam that needs to be monitored for defects, photographing cracks and depressions from different angles of the set monitoring points; and numbering each collected image; At the same time, it can record the environmental information around the crack, such as the damage of concrete, water seepage near the crack, etc. Preprocessing the collected dam concrete defect images can improve the monitoring data quality. All defect images are converted into a unified format and resolution. Defect images are enhanced as needed, including adjusting brightness, contrast, saturation, etc. to make cracks clearer. Filters are used to remove noise in the image. Edge detection or segmentation algorithms, such as threshold segmentation and region growing, are used to separate the defect area from the background. Features are extracted from the segmented defect images, such as the length, width, depth, shape and direction of cracks and depressions. The location of the defect is marked on the image. The starting and ending points of the defect and the acquisition time are recorded. The preprocessed image and the extracted feature data are stored in a database or file. The depression distance in this embodiment is the maximum value of the depth data collected from a single depression; See also Figure 2 , the method for obtaining the crack area in this embodiment is: divide the crack in the crack image into grids, count the number of grid units of the crack, and multiply the size of each grid unit to obtain the crack area of ​​the crack; See also Figure 3 In this embodiment, the method for obtaining the crack spacing is as follows: draw a circumscribed rectangle for the crack, take the center point of the circumscribed rectangle as the crack center point of the crack, calculate the distance between the crack and the crack centers of the surrounding cracks, and obtain the minimum value of the distance between the crack centers as the crack spacing of the crack; S22, input the crack data into the crack abnormal value calculation formula to calculate the crack abnormal value, the crack abnormal value calculation formula is: ; in, is the crack outlier value, is the crack area abnormality ratio coefficient, is the crack distance anomaly ratio coefficient, , is the area of ​​the qth crack collected in the gth time, is the area of ​​the qth crack collected at the g-1th time, is the time of collecting the qth crack area for the gth time, is the time for collecting the qth crack area for the g-1th time, is the number of cracks collected, is the abnormal threshold of crack area change, is the number of defect images collected, is the i-th crack spacing collected in the g-th time, is the i-th crack spacing collected at the g-1th time, is the time of collecting the i-th crack spacing for the g-th time, is the time of collecting the i-th crack spacing for the g-1th time, is the number of crack spacings collected, is the abnormal threshold of crack spacing change; S23, inputting the concave data into the concave abnormal value calculation formula to calculate the concave abnormal value, the concave abnormal value calculation formula is: ; in, is a concave outlier, is the distance of the nth depression collected in the gth time, is the distance of the nth depression collected at the g-1th time, is the time of collecting the nth depression spacing for the gth time, is the time for collecting the nth depression spacing for the g-1th time, is the abnormal threshold of depression distance change, is the number of collected depression distances; S24, inputting the crack abnormal value and the depression abnormal value into the dam concrete defect abnormal value calculation formula to calculate the dam concrete defect abnormal value, the dam concrete defect abnormal value calculation formula is: ; in, is the abnormal value of dam concrete defects, is the crack anomaly ratio coefficient, is the depression anomaly ratio coefficient, . ‌ S3, obtaining abnormal changes of dam concrete based on abnormal defects of dam concrete and abnormal hydrological conditions; In this embodiment, S3 includes the following specific steps: The abnormal change rate of dam concrete is obtained according to the abnormal value of dam concrete defects and the abnormal value of hydrology. The expression of the abnormal change rate of dam concrete is: ; Wherein, Tm is the set cycle length.

[0019] Specifically, the set cycle duration is the duration for collecting historical hydrological data of the basin where the dam is located or collecting historical defect images of the dam concrete.

[0020] S4. Derivation of the service life of dam concrete based on the abnormal threshold of dam concrete defects; In this embodiment, S4 includes the following specific steps: The abnormal threshold of dam concrete defect is input into the service life calculation formula of dam concrete to calculate the service life of dam concrete. The service life calculation formula of dam concrete is: ; in, is the service life of dam concrete, and Flam is the abnormal threshold of dam concrete defects.

[0021] S5. Evaluate the durability of dam concrete based on service life; In this embodiment, S5 includes the following specific steps: The service life of the dam concrete is compared with the preset service life threshold. If the service life of the dam is greater than or equal to the service life threshold, it is judged that there is no risk in the dam concrete; if the service life of the dam is less than the service life threshold, it is judged that there is a risk in the dam concrete and a durability alarm is triggered.

[0022] Specifically, the service life threshold of dam concrete is set according to the designed service life when the dam is built. The designed service life is obtained through the dam design documents, including preliminary design, construction drawing design, technical specifications, etc.

[0023] Specifically, Abnormal water velocity ratio, Water level anomaly ratio coefficient, water flow velocity anomaly threshold , water level change abnormal threshold , Crack area abnormality ratio coefficient , Crack distance anomaly ratio coefficient, crack area change anomaly threshold , abnormal threshold of crack spacing change , abnormal threshold of depression distance change , Crack abnormality ratio coefficient , Sag anomaly ratio coefficient The method of obtaining the abnormal threshold value of dam concrete defects is as follows: select one hundred concrete dams of different types, collect historical hydrological data of the basin where the dam is located, and input the historical hydrological data of a set period into the hydrological anomaly calculation formula to calculate the hydrological anomaly; collect historical defect images of the dam concrete for a set period, input crack data into the crack anomaly calculation formula to calculate crack anomaly values, input depression data into the depression anomaly calculation formula to calculate depression anomaly values, input crack anomaly values ​​and depression anomaly values ​​into the dam concrete defect anomaly calculation formula to calculate the dam concrete defect anomaly values, obtain the dam concrete abnormal change rate based on the dam concrete defect anomaly values ​​and hydrological anomaly values, input the dam concrete defect abnormal threshold value into the dam concrete service life calculation formula to calculate the service life of the dam concrete, and judge whether the dam concrete has risks based on the service life; hire construction experts to evaluate the service life and whether there are risks for the one hundred concrete dams, and input the calculated service life and risk of the dam concrete and the construction experts' evaluation of the concrete dam service life and risk into the fitting software to output a set of the highest accuracy. Abnormal water velocity ratio, Water level anomaly ratio coefficient, water flow velocity anomaly threshold , water level change abnormal threshold , Crack area abnormality ratio coefficient , Crack distance anomaly ratio coefficient, crack area change anomaly threshold , abnormal threshold of crack spacing change , abnormal threshold of depression distance change , Crack abnormality ratio coefficient , Sag anomaly ratio coefficient and the value of abnormal threshold of dam concrete defects. Example 2

[0024] See also Figure 4 , a dam concrete durability evaluation system based on scenario analysis, used to implement a dam concrete durability evaluation method based on scenario analysis, including a control module, a hydrological data acquisition module, a hydrological anomaly evaluation module, a defect image acquisition module, a defect anomaly evaluation module, a dam abnormal change calculation module, a service life evaluation module and a durability evaluation module; In this embodiment, the hydrological data collection module is used to collect the historical water level and historical water flow velocity of the basin where the dam is located; The hydrological anomaly assessment module is used to input the historical hydrological data of a set period into the hydrological anomaly value calculation formula to calculate the hydrological anomaly value; The defect image acquisition module is used to collect historical defect images of dam concrete, obtain crack area and crack spacing after preprocessing crack images, and obtain depression distance after preprocessing depression images; The defect anomaly assessment module is used to input crack data into a crack anomaly value calculation formula to calculate crack anomaly values, input depression data into a depression anomaly value calculation formula to calculate depression anomaly values, and input crack anomaly values ​​and depression anomaly values ​​into a dam concrete defect anomaly value calculation formula to calculate dam concrete defect anomaly values; The dam abnormal change calculation module is used to obtain the dam concrete abnormal change rate according to the dam concrete defect abnormal value and hydrological abnormal value; The service life assessment module is used to input the abnormal threshold of dam concrete defects into the dam concrete service life calculation formula to calculate the service life of the dam concrete; The durability assessment module is used to compare the service life of the dam concrete with the preset service life threshold to assess the durability of the dam concrete; In this embodiment, the control module is used to control the operation of the hydrological data acquisition module, the hydrological anomaly assessment module, the defect image acquisition module, the defect anomaly assessment module, the dam abnormal change calculation module, the service life assessment module and the durability assessment module.

[0025] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present invention can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0026] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only one way. There may be other division methods in actual implementation. For example, 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. The indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0027] In the description of this specification, the descriptions with reference to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

Claims

1. A dam concrete durability assessment method based on scenario analysis, characterized in that: The specific steps include: S1. Collect historical hydrological data of the set period in the basin where the dam is located, and evaluate hydrological anomalies based on the historical hydrological data; S2. Collect historical defect images of the dam concrete at a set period, and evaluate the abnormal defect conditions of the dam concrete based on the historical defect images; S3, obtaining abnormal changes of dam concrete based on abnormal defects of dam concrete and abnormal hydrological conditions; S4. Derivation of the service life of dam concrete based on the abnormal threshold of dam concrete defects; S5. Evaluate the durability of dam concrete based on service life.

2. The dam concrete durability assessment method based on scenario analysis according to claim 1 is characterized in that: The S1 comprises the following specific steps: S11, collecting historical hydrological data of a set period in the river basin where the dam is located, wherein the historical hydrological data includes historical water levels and historical water flow velocities; S12, inputting historical hydrological data into a hydrological anomaly value calculation formula to calculate the hydrological anomaly value, the hydrological anomaly value calculation formula is: ; in, is the hydrological anomaly value, is the water velocity anomaly ratio, is the water level anomaly ratio coefficient, , is the historical water flow velocity collected at the uth time, is the abnormal water velocity threshold, is the number of times historical hydrological data were collected, is the historical water level collected for the u-1th time, when ,Right now for hour, The value is 0. is the historical water level collected at the uth time, is the height difference between the historical water level collected at the uth time and the historical water level collected at the u-1th time, is the time difference between the u-th acquisition and the u-1-th acquisition, is the abnormal water level change threshold.

3. The dam concrete durability assessment method based on scenario analysis according to claim 2 is characterized in that: The S2 comprises the following specific steps: S21, collecting historical defect images of the dam concrete during a set period, the historical defect images including historical crack images and historical depression images, pre-processing the historical crack images and historical depression images to obtain crack data and depression data, the crack data including crack area and crack spacing, and the depression data including depression distance; S22, inputting the crack data into a crack abnormal value calculation formula to calculate the crack abnormal value, wherein the crack abnormal value calculation formula is: ; in, is the crack outlier value, is the crack area abnormality ratio coefficient, is the crack distance anomaly ratio coefficient, , is the area of ​​the qth crack collected in the gth time, is the area of ​​the qth crack collected at the g-1th time, is the time of collecting the qth crack area for the gth time, is the time for collecting the qth crack area for the g-1th time, is the number of cracks collected, is the abnormal threshold of crack area change, is the number of defect images collected, is the i-th crack spacing collected in the g-th time, is the i-th crack spacing collected at the g-1th time, is the time of collecting the i-th crack spacing for the g-th time, is the time of collecting the i-th crack spacing for the g-1th time, is the number of crack spacings collected, is the abnormal threshold of crack spacing change; S23, inputting the concave data into a concave abnormal value calculation formula to calculate the concave abnormal value, the concave abnormal value calculation formula is: ; in, is a concave outlier, is the distance of the nth depression collected in the gth time, is the distance of the nth depression collected at the g-1th time, is the time of collecting the nth depression spacing for the gth time, is the time for collecting the nth depression spacing for the g-1th time, is the abnormal threshold of depression distance change, is the number of collected depression distances; S24, inputting the crack abnormal value and the depression abnormal value into the dam concrete defect abnormal value calculation formula to calculate the dam concrete defect abnormal value, the dam concrete defect abnormal value calculation formula is: ; in, is the abnormal value of dam concrete defects, is the crack anomaly ratio coefficient, is the depression anomaly ratio coefficient, .

4. The dam concrete durability assessment method based on scenario analysis according to claim 3 is characterized in that: The S3 includes the following specific steps: The abnormal change rate of dam concrete is obtained according to the abnormal value of dam concrete defects and the abnormal value of hydrology. The expression of the abnormal change rate of dam concrete is: ； Wherein, Tm is the set cycle duration.

5. The dam concrete durability assessment method based on scenario analysis according to claim 4 is characterized in that: The S4 comprises the following specific steps: The abnormal threshold of dam concrete defect is input into the service life calculation formula of dam concrete to calculate the service life of dam concrete. The service life calculation formula of dam concrete is: ; in, is the service life of dam concrete, and Flam is the abnormal threshold of dam concrete defects.

6. The dam concrete durability assessment method based on scenario analysis according to claim 5 is characterized in that: The S5 comprises the following specific steps: The service life of the dam concrete is compared with the preset service life threshold. If the service life of the dam is greater than or equal to the service life threshold, it is judged that there is no risk in the dam concrete; if the service life of the dam is less than the service life threshold, it is judged that there is a risk in the dam concrete and a durability alarm is triggered.

7. A dam concrete durability assessment system based on scenario analysis, used to implement the dam concrete durability assessment method based on scenario analysis as claimed in any one of claims 1 to 6, characterized in that: It includes control module, hydrological data acquisition module, hydrological anomaly assessment module, defect image acquisition module, defect anomaly assessment module, dam abnormal change calculation module, service life assessment module and durability assessment module; The hydrological data acquisition module is used to collect the historical water level and historical water flow velocity of the basin where the dam is located; The hydrological anomaly assessment module is used to input historical hydrological data of a set period into a hydrological anomaly value calculation formula to calculate the hydrological anomaly value; The defect image acquisition module is used to collect historical defect images of dam concrete, obtain crack area and crack spacing after preprocessing crack images, and obtain depression distance after preprocessing depression images; The defect anomaly assessment module is used to input crack data into a crack anomaly value calculation formula to calculate crack anomaly values, input depression data into a depression anomaly value calculation formula to calculate depression anomaly values, and input crack anomaly values ​​and depression anomaly values ​​into a dam concrete defect anomaly value calculation formula to calculate dam concrete defect anomaly values.

8. The dam concrete durability assessment system based on scenario analysis according to claim 7 is characterized in that: The dam abnormal change calculation module is used to obtain the dam concrete abnormal change rate according to the dam concrete defect abnormal value and the hydrological abnormal value; The service life assessment module is used to input the abnormal threshold of dam concrete defects into the dam concrete service life calculation formula to calculate the service life of the dam concrete; The durability assessment module is used to compare the service life of the dam concrete with a preset service life threshold to assess the durability of the dam concrete; The control module is used to control the operation of the hydrological data acquisition module, the hydrological anomaly assessment module, the defect image acquisition module, the defect anomaly assessment module, the dam abnormal change calculation module, the service life assessment module and the durability assessment module.

Images