Intelligent evaluation system and method for safe operation of silt dam

Abstract

The present invention relates to the field of data analysis technology, and in particular to an intelligent evaluation system and method for safe operation of a silt dam, comprising a data acquisition module, a data analysis module, an intelligent evaluation module and an evaluation and analysis module; the data analysis module draws a speed time domain diagram to determine the historical average speed and the unit speed change frequency within a unit period, the intelligent evaluation module determines the operation characterization trend to determine the operation characterization state of the silt dam in combination with the upstream and downstream water level difference, and determines whether to issue a safety warning message according to the operation characterization trend or the operation characterization state, and the evaluation and analysis module determines the cause of the dangerous operation according to the judgment result of the dangerous operation state in combination with the upstream and downstream water level difference. The present invention significantly improves the safety management level of the silt dam through functions such as real-time monitoring, accurate evaluation, rapid response and intelligent analysis, reduces safety risks and maintenance costs, and provides strong technical support and decision-making basis for inspectors and managers.

Description

Technical Field

[0001] The present invention relates to the technical field of data analysis, and in particular to an intelligent evaluation system and method for safe operation of a silt dam. Background Art

[0002] The intelligent assessment of the safe operation of the silt dam mainly relies on the development of high-precision sensors, Internet of Things communication technology and data analysis technology. These technologies together constitute the silt dam safety online monitoring and early warning information management system. The system can monitor the data information of the silt dam in real time, and judge the safety of the dam body through analysis to make timely and accurate early warning forecasts of potential dangers.

[0003] Patent application publication number CN117634920A discloses a multi-source data-driven method for evaluating the ecological benefits of silt dams based on small watersheds, which involves the field of soil and water conservation. The method includes: obtaining a digital elevation model of the area to be evaluated, and dividing the area to be evaluated into small watersheds according to the digital elevation model; selecting indicators for evaluating the ecological benefits of silt dams, wherein the indicators include soil erosion modulus, soil conservation, vegetation coverage, new forest rate, cultivated land area reduction rate, soil moisture content and habitat quality; obtaining multi-source data, constructing an automatic preparation algorithm for each indicator, and calculating the value of each indicator year by year and small watershed according to the multi-source data and the automatic preparation algorithm; calculating the comprehensive weight of each indicator; and obtaining the ecological benefits of silt dams in each small watershed every year according to the values ​​of each indicator and the comprehensive weight of each indicator. This application is used to solve the problem that it is currently impossible to conduct a refined evaluation of the ecological benefits of silt dams in large areas for many consecutive years. It can be seen that the application has the following problems:

[0004] The invention does not pre-evaluate the safe operation of the silt dam based on the dam's operating data, nor does it analyze the causes of the dangerous operation. Summary of the invention

[0005] To this end, the present invention provides an intelligent evaluation system for the safe operation of a silt dam, which is used to overcome the problems in the prior art that the safe operation of the silt dam is not evaluated in advance based on the operating data of the silt dam, and the causes of dangerous operation are not analyzed, so as to improve the safety management level of the silt dam and provide strong technical support and decision-making basis for inspectors and managers.

[0006] To achieve the above objectives, on the one hand, the present invention provides an intelligent evaluation system for safe operation of a silt dam, comprising:

[0007] A data acquisition module, including a data acquisition unit for acquiring design data of the silt dam and a data monitoring unit for real-time acquisition of seepage volume and seepage pressure at key locations of the silt dam, the upstream water level of the silt dam, the downstream water level of the silt dam, and the water flow rate of the spillway;

[0008] The design data include normal water storage level, design range of spillway water flow rate, design seepage volume and design seepage pressure;

[0009] A data analysis module connected to the data acquisition module, for drawing a velocity time domain diagram according to the water flow velocity of the spillway, and determining the historical average velocity and the unit velocity change frequency within a unit period according to the velocity time domain diagram;

[0010] An intelligent evaluation module, which is connected to the data acquisition module, is used to determine the operation characterization trend of the silt dam according to the upstream water level of the silt dam, determine the operation characterization state of the silt dam in combination with the upstream and downstream water level difference, and determine whether to issue a safety warning information according to the operation characterization trend or the operation characterization state;

[0011] The operation characterization trend includes a dangerous operation trend and a safe operation trend, and the operation characterization state includes a dangerous operation state and a safe operation state;

[0012] An evaluation and analysis module, which is respectively connected to the data acquisition module, the data analysis module and the intelligent evaluation module, and is used to determine an analysis method of the cause of the dangerous operation according to the dangerous operation state, the upstream water level and the downstream water level, including:

[0013] Determine the cause of the dangerous operation based on the historical average speed and the unit speed change frequency;

[0014] Or, determining the cause of the dangerous operation based on the dam body seepage volume and dam body seepage pressure;

[0015] Among them, the reasons for the dangerous operation include uneven settlement of the dam body, excessive siltation and seepage in the dam body.

[0016] Furthermore, the data monitoring unit includes,

[0017] Several seepage monitoring devices are located at key positions of the silt dam. A single seepage monitoring device includes a flow meter and a piezometer to determine the seepage volume and seepage pressure at the corresponding position.

[0018] A plurality of velocity sensors are evenly arranged at various positions of the spillway to determine the water flow velocity at each position, and the water flow velocity of the spillway is determined based on the average value of the water flow velocity at each position;

[0019] A plurality of water level gauges are installed at corresponding positions upstream and downstream of the silt dam to determine the upstream water level and downstream water level of the silt dam.

[0020] Furthermore, the data analysis module filters out invalid water-passing speeds in the speed time domain diagram before any time to obtain standard water-passing speeds, and determines the historical average speed at the corresponding time according to the average value of each standard water-passing speed.

[0021] Further, the data analysis module determines a unit speed time domain diagram corresponding to any time to determine the number of maximum values ​​and the number of minimum values ​​in the unit speed time domain diagram, and determines the number of changes according to the number of maximum values ​​and the number of minimum values, and determines the unit speed change frequency according to the number of changes and the unit period;

[0022] The time length of the unit speed time domain diagram is a unit period.

[0023] Furthermore, the intelligent assessment module determines the operation trend of the silt dam according to the upstream water level of the silt dam and determines whether to issue a safety warning message, including:

[0024] If the upstream water level is greater than or equal to the normal water storage level, the operation characteristic trend of the silt dam is determined to be a dangerous operation trend and a safety warning message is issued;

[0025] If the upstream water level is lower than the normal water storage level, it is determined that the operation characteristic trend of the silt dam is a safe operation trend and whether to issue a safety warning message is determined according to the operation characteristic state.

[0026] Furthermore, the intelligent evaluation module determines the operational status of the silt dam and determines whether to issue a safety warning message based on the determination result of the safety operation trend and the upstream and downstream water level difference, including:

[0027] If the upstream and downstream water level difference is greater than the preset water level difference or the upstream and downstream water level difference is less than the water level difference threshold, the operation status of the silt dam is determined to be a dangerous operation status and a safety warning message is issued;

[0028] If the upstream and downstream water level difference is less than or equal to the preset water level difference and the upstream and downstream water level difference is greater than or equal to the water level difference threshold, the operation status of the silt dam is determined to be a safe operation status;

[0029] The upstream and downstream water level difference is the difference between the upstream water level and the downstream water level.

[0030] Furthermore, the evaluation and analysis module determines the cause of the dangerous operation according to the determination result of the dangerous operation state and the upstream and downstream water level difference, including:

[0031] If the upstream and downstream water level difference is greater than the preset water level difference, the cause of the dangerous operation is determined according to the historical average speed and the unit speed change frequency;

[0032] If the upstream and downstream water level difference is less than the water level difference threshold, the cause of the dangerous operation is determined based on the dam body seepage volume and the dam body seepage pressure.

[0033] Furthermore, the evaluation and analysis module determines the cause of the dangerous operation according to the historical average speed and the unit speed change frequency, including:

[0034] If the historical average speed is greater than the design range of the water flow speed and / or the unit speed change frequency is greater than or equal to the preset change frequency, it is judged that the cause of the dangerous operation is uneven settlement on the upstream side of the dam body;

[0035] If the historical average speed is less than the design range of the water flow speed and the unit speed change frequency is less than the preset change frequency, it is judged that the cause of the dangerous operation is serious soil and water loss upstream of the silt dam.

[0036] Furthermore, the evaluation and analysis module determines the cause of the dangerous operation according to the dam body seepage volume and the dam body seepage pressure, including:

[0037] If the seepage volume of the dam body is greater than the designed seepage volume and the seepage pressure of the dam body is greater than the designed seepage pressure, it is determined that the cause of the dangerous operation is the existence of severe seepage in the dam body;

[0038] If the seepage volume of the dam body is less than or equal to the designed seepage volume and the seepage pressure of the dam body is less than or equal to the designed seepage pressure, it is determined that the cause of the dangerous operation is uneven settlement on the downstream side of the dam body.

[0039] On the other hand, the present invention also provides an intelligent evaluation method for safe operation of a silt dam, comprising:

[0040] Obtain the design data of the silt dam and collect the seepage volume and seepage pressure at each key position of the dam body, the upstream water level of the silt dam, the downstream water level of the silt dam and the water flow rate of the spillway in real time, and draw the water flow rate of the spillway and draw a speed time domain diagram;

[0041] Determine the operation trend of the silt dam according to the upstream water level of the silt dam and determine whether to issue a safety warning information according to the operation trend;

[0042] Determine the operational status of the silt dam based on the operational trend of the silt dam and the upstream and downstream water level difference, and determine whether to issue a safety warning information based on the operational status;

[0043] Determine the historical average speed and the unit speed change frequency within a unit period according to the dangerous operation state control evaluation and analysis module;

[0044] Determine the analysis method of the cause of the dangerous operation according to the magnitude relationship between the upstream water level and the downstream water level to determine the cause of the dangerous operation;

[0045] The analysis method for determining the cause of dangerous operation according to the magnitude relationship between the upstream water level and the downstream water level includes:

[0046] Determine the cause of the dangerous operation based on the historical average speed and the unit speed change frequency;

[0047] Alternatively, the cause of the dangerous operation is determined based on the seepage volume and seepage pressure of the dam body.

[0048] Compared with the prior art, the beneficial effect of the present invention is that the intelligent evaluation system for safe operation of the silt dam provided by the present invention realizes real-time monitoring and accurate evaluation of the operation status of the silt dam by integrating data collection, data analysis, intelligent evaluation and evaluation analysis modules. The system can instantly capture key data such as seepage volume, seepage pressure, upstream water level of the silt dam, downstream water level of the silt dam and water flow rate of the spillway at key positions of the dam body, quickly judge the operation characterization trend and status of the silt dam, and promptly send early warning information to inspectors when potential safety hazards are found. At the same time, it can also quickly determine the specific reasons for the dangerous operation of the silt dam, such as uneven settlement of the dam body, excessive siltation or the presence of seepage, based on data such as dangerous operation status, upstream water level of the silt dam, downstream water level of the silt dam, and dam body seepage volume and seepage pressure, so as to provide comprehensive and accurate information support for inspectors and managers; this not only significantly improves decision-making efficiency and accuracy, reduces economic losses and casualties caused by safety accidents such as dam body failure, but also effectively reduces daily maintenance costs, and provides a solid technical guarantee for the safe operation of the silt dam;

[0049] Furthermore, the data analysis module accurately defines the range of qualified water-passing speeds, filters out invalid water-passing speeds to accurately determine the historical average speed, and accurately captures the changing characteristics of the unit speed time domain diagram, calculates the unit speed change frequency, and flexibly sets the unit cycle, providing powerful data support and analysis capabilities for the intelligent evaluation system for safe operation of the silt dam. This not only improves the system's monitoring accuracy and efficiency of the silt dam's operating status, but also helps to timely discover and warn of potential safety hazards.

[0050] Furthermore, the intelligent assessment module provides a powerful assessment capability and early warning mechanism for the intelligent assessment system of safe operation of silt dams by judging the operation characterization trend, determining the operation status by combining the upstream and downstream water level difference, and deeply analyzing the causes of unsafe operation. This not only improves the overall performance and safety of the system, but also helps to reduce the economic losses and casualties caused by safety accidents such as silt dam failures.

[0051] Furthermore, the evaluation and analysis module provides a powerful evaluation capability and early warning mechanism for the intelligent evaluation system of safe operation of silt dams by accurately analyzing the specific reasons for dangerous operation of silt dams, adopting differentiated analysis strategies, and real-time monitoring of parameters such as dam body seepage and seepage pressure, thus improving the overall performance and safety of the system.

[0052] Furthermore, the assessment and analysis module provides a powerful assessment capability and early warning mechanism for the intelligent assessment system for safe operation of silt dams by accurately determining the causes of dangerous operations, adopting differentiated judgment criteria, promptly discovering seepage problems, determining downstream settlement, and providing inspection basis for inspectors. This not only improves the overall performance and safety of the system, but also helps to reduce the economic losses and casualties caused by safety accidents such as silt dam failures, providing a solid technical guarantee for the safe and stable operation of silt dams. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a connection diagram of the intelligent evaluation system for safe operation of a silt dam according to an embodiment of the present invention;

[0054] Figure 2 A diagram showing the steps for the data analysis module of an embodiment of the present invention to obtain a water flow rate that meets the standard at any time;

[0055] Figure 3 A flow chart of an analysis method for determining the cause of dangerous operation according to an embodiment of the present invention;

[0056] Figure 4 This is a step diagram of the intelligent evaluation method for safe operation of a silt dam according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0059] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0060] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] See also Figure 1 As shown, it is a connection diagram of the intelligent evaluation system for safe operation of a silt dam according to an embodiment of the present invention. The embodiment of the present invention provides an intelligent evaluation system for safe operation of a silt dam, including:

[0062] A data acquisition module, including a data acquisition unit for acquiring design data of the silt dam and a data monitoring unit for real-time acquisition of seepage volume and seepage pressure at key locations of the silt dam, the upstream water level of the silt dam, the downstream water level of the silt dam, and the water flow rate of the spillway;

[0063] The design data include normal water storage level, design water level difference range, design range of spillway water flow rate, design seepage volume and design seepage pressure;

[0064] A data analysis module connected to the data acquisition module, for drawing a velocity time domain diagram according to the water flow velocity of the spillway, and determining the historical average velocity and the unit velocity change frequency within a unit period according to the velocity time domain diagram;

[0065] An intelligent evaluation module, which is connected to the data acquisition module, is used to determine the operation characterization trend of the silt dam according to the upstream water level of the silt dam, determine the operation characterization state of the silt dam in combination with the upstream and downstream water level difference, and determine whether to issue a safety warning information according to the operation characterization trend or the operation characterization state;

[0066] The operation characterization trend includes a dangerous operation trend and a safe operation trend, and the operation characterization state includes a dangerous operation state and a safe operation state;

[0067] An evaluation and analysis module, which is respectively connected to the data acquisition module, the data analysis module and the intelligent evaluation module, and is used to determine an analysis method of the cause of the dangerous operation according to the dangerous operation state, the upstream water level and the downstream water level, including:

[0068] Determine the cause of the dangerous operation based on the historical average speed and the unit speed change frequency;

[0069] Or, determining the cause of the dangerous operation based on the dam body seepage volume and dam body seepage pressure;

[0070] Among them, the reasons for the dangerous operation include uneven settlement of the dam body, excessive siltation and seepage in the dam body.

[0071] It can be understood that the intelligent evaluation system for safe operation of silt dams provided by the present invention has significantly improved the safety management level of silt dams, reduced safety risks and maintenance costs, and provided strong technical support and decision-making basis for inspectors and managers through functions such as real-time monitoring, accurate evaluation, rapid response and intelligent analysis: (1) The data acquisition module collects key parameters of the silt dam body in real time, such as seepage volume, seepage pressure, upstream water level of the silt dam, downstream water level of the silt dam, and water flow rate of the spillway. The system can instantly grasp the operating status of the silt dam. At the same time, combined with the analysis of the intelligent evaluation module, the system can detect potential safety hazards in the first place and issue safety warning information to inspectors, thereby effectively preventing the occurrence of dam safety accidents; (2) The intelligent evaluation module can judge the operating trend and operating status of the silt dam based on key data such as the upstream water level and downstream water level of the silt dam. This accurate evaluation helps inspectors to take targeted maintenance and management measures in a timely manner to ensure the safe operation of the silt dam; (3) Evaluation and analysis The module can quickly determine the specific reasons for the dangerous operation of the silt dam, such as uneven settlement of the dam, excessive siltation, or seepage in the dam, by comprehensively analyzing data such as the dangerous operation status, the upstream water level of the silt dam, the downstream water level of the silt dam, and the seepage volume and seepage pressure of the dam body. This ability to quickly determine the reasons for safe operation greatly improves the work efficiency of inspectors, enabling them to quickly take countermeasures and eliminate safety hazards. (4) The real-time monitoring data, operation trend evaluation, operation status judgment, and safety operation reason analysis provided by this system provide comprehensive and accurate information support for inspectors and managers, helping them make more scientific and reasonable decisions and improve the efficiency and accuracy of silt dam safety management. (5) Through real-time monitoring and intelligent evaluation, this system can promptly detect and warn of potential safety hazards, thereby avoiding or reducing economic losses and casualties caused by safety accidents such as dam failures. At the same time, the system's accurate evaluation and rapid response capabilities also help reduce the daily maintenance costs and safety risks of silt dams.

[0072] Specifically, the data monitoring unit includes,

[0073] A number of seepage monitoring devices, which are respectively located at key positions of the dam body, and a single seepage monitoring device includes a flow meter and an osmometer to determine the seepage volume and seepage pressure at the corresponding position;

[0074] In implementation, the flow meter is any one of the existing technologies, and the flow rate of seepage can be directly measured by the flow meter; the osmometer is a sensor specially used to measure the seepage pressure, and its working principle is to use the change of the frequency of the vibrating wire to measure the seepage water pressure. When the seepage pressure acts on the osmometer, the inductive membrane plate inside the osmometer is deformed to drive the stress change of the vibrating wire, thereby changing the vibration frequency of the vibrating wire. By measuring the frequency of the vibrating wire, the magnitude of the seepage pressure can be calculated; the osmometer must be calibrated and inspected before installation to ensure its good performance. During installation, the osmometer must be operated according to the installation instructions to ensure that it is in close contact with the surrounding dam structure;

[0075] It is understandable that the key parts of a check dam and their number are related to the size of the dam. Usually: (1) For a small check dam, it is generally sufficient to set up 2 to 3 monitoring locations downstream of the dam (on both sides of the dam foot and in the center). This is because the seepage path of a small check dam is relatively simple, and the main seepage outlets are concentrated near the dam foot. These 2 / 3 locations can basically reflect the overall seepage volume of the dam body and can verify the accuracy of the data with each other. (2) For a medium-sized check dam, it is usually necessary to set up 4 to 6 monitoring locations at the downstream dam slope, dam foot and outlet of the drainage facilities behind the dam. In addition to the dam foot, setting up monitoring points on the downstream dam slope can capture the seepage conditions on the dam slope, especially During rainfall or water storage, slope seepage may be more obvious; the monitoring point at the outlet of the drainage facility behind the dam is used to monitor the seepage discharged through the drainage facility (generally no monitoring point is set here); (3) For large silt dams, 6 to 10 monitoring locations may need to be set up. Monitoring points should be set up at different elevations downstream of the dam body, at different dam sections, and at locations related to geological structure changes; in one implementation, monitoring points are set up at the parts where the dam body contacts different geological layers, because concentrated seepage may occur in these places. Monitoring points can also be set up at locations such as the outlet of the drainage corridor inside the dam body to timely detect the seepage situation inside the dam body and ensure the seepage safety of large dam bodies;

[0076] A plurality of velocity sensors are evenly arranged at various positions of the spillway to determine the water flow velocity at each position, and the water flow velocity of the spillway is determined based on the average value of the water flow velocity at each position;

[0077] In implementation, the number of velocity sensors is set to be more than 5, and they are usually set at the bend of the spillway, the gradient section or different depths of the water-passing section (water surface, 0.2 times the water depth, 0.6 times the water depth, 0.8 times the water depth and near the river bottom to obtain the water flow velocity at different depths on the water-passing section. The water flow velocity is unevenly distributed on the water-passing section, and the velocity usually decreases gradually from the water surface to the river bottom); in implementation, the velocity sensor is any sensor that can measure water flow velocity in the prior art;

[0078] It can be understood that the average of the water flow speeds at each position at any time is the water flow speed of the spillway at that time, and the velocity time domain diagram is drawn according to the water flow speed of the spillway at each time;

[0079] Several water level gauges are installed at corresponding positions upstream and downstream of the silt dam to determine the upstream water level and downstream water level of the silt dam. In practice, two water level gauges are usually installed at appropriate positions upstream and downstream of the silt dam.

[0080] During implementation, a water level gauge is installed at appropriate locations upstream and downstream of the silt dam (determined during the design phase of the silt dam). The water level gauge is a ruler with scales. The water level height can be obtained by directly reading the scale value corresponding to the water level on the water level gauge. The installation of the water level gauge must ensure that it is vertical and firm, and the zero point scale position must be accurately calibrated before installation. Generally, its bottom is placed on a predetermined reference elevation point.

[0081] Specifically, the data analysis module filters the invalid water-passing speeds in the speed time domain diagram before any time to obtain the standard water-passing speeds, and determines the historical average speed at the corresponding time according to the average value of each of the standard water-passing speeds.

[0082] See also Figure 2 As shown, it is a step diagram of the data analysis module of the embodiment of the present invention obtaining the standard water flow speed at any time. The steps of the data analysis module obtaining the standard water flow speed at any time include: (1) determining the average value of the spillway water flow speed and the standard deviation of the spillway water flow speed in the speed time domain diagram before any time; (2) determining the standard water flow speed range according to the average value A of the spillway water flow speed and the standard deviation B of the spillway water flow speed, and the standard water flow speed range is AB to A+B; (3) determining the water flow speed exceeding the standard water flow speed range [AB, A+B] as an invalid water flow speed, and determining the water flow speed within the standard water flow speed range [AB, A+B] as a valid water speed.

[0083] It can be understood that the data analysis module can scientifically define the range of qualified water flow speeds by calculating the average and standard deviation of the spillway water flow speed in the velocity time domain diagram before any time, which not only improves the accuracy of data processing, but also helps to reasonably determine the historical average speed in the future, thereby providing more reliable data support for the safety assessment of the silt dam; secondly, the data analysis module can filter out invalid water flow speeds and retain only valid water speeds for subsequent analysis by comparing the spillway water flow speed with the qualified water flow speed range, which not only reduces the complexity of data processing, but also improves the efficiency and accuracy of data analysis, and helps to quickly identify abnormal conditions in the operation of the silt dam.

[0084] Specifically, the data analysis module determines a unit speed time domain diagram corresponding to any time to determine the number of maximum values ​​and the number of minimum values ​​in the unit speed time domain diagram, determines the number of changes according to the number of maximum values ​​and the number of minimum values, and determines the unit speed change frequency according to the number of changes and the unit period;

[0085] The time length of the unit speed time domain diagram is a unit period.

[0086] It can be understood that the number of maximum values ​​and the number of minimum values ​​should be equal or differ by "1", so in implementation, (1) if the number of maximum values ​​is equal to the number of minimum values, then the number of changes = the number of maximum values ​​+ the number of minimum values; (2) if the number of maximum values ​​is greater than the number of minimum values, then the number of changes = 2 × the number of minimum values; (3) if the number of maximum values ​​is less than the number of minimum values, then the number of changes = 2 × the number of maximum values;

[0087] In implementation, the frequency of unit velocity change is the ratio of the number of changes to the unit period. The value range of the unit period is 1 hour to 1 week. The value of the unit period should take into account the monitoring purpose and data accuracy requirements. If the purpose is to quickly detect changes in water flow velocity that may be caused by sudden factors such as uneven settlement, a shorter unit period is required to capture rapidly changing information. For some situations where structural changes may occur in a short period of time, resulting in sudden changes in water flow velocity, such as sudden settlement of the dam body, the unit period may need to be set to 1 hour to 2 hours, so that speed changes in a short period of time can be discovered in time.

[0088] It can be understood that by constructing a unit velocity time domain diagram and analyzing the number of maximum and minimum values ​​therein, the data analysis module can accurately capture the changing characteristics of the water flow velocity of the spillway of the silt dam within a unit period, which not only improves the precision of data processing but also helps to have a more comprehensive understanding of the operating status of the silt dam; the number of changes determined by the number of maximum and minimum values, combined with the unit velocity change frequency calculated per unit period, provides an important indicator for evaluating the stability and safety of the silt dam operation, and can intuitively reflect the changing trend and frequency of the water flow velocity of the silt dam, which helps to promptly discover potential abnormal changes, such as sudden changes in water flow velocity caused by sudden factors such as uneven settlement of the dam body.

[0089] See also Figure 3 As shown, it is a flow chart of the analysis method for determining the cause of dangerous operation in an embodiment of the present invention. Specifically, the intelligent evaluation module determines the operation characteristic trend of the silt dam according to the upstream water level of the silt dam and determines whether to issue a safety warning information, including:

[0090] If the upstream water level is greater than or equal to the normal water storage level, the operation characteristic trend of the silt dam is determined to be a dangerous operation trend and a safety warning message is issued;

[0091] If the upstream water level is lower than the normal water storage level, it is determined that the operation characteristic trend of the silt dam is a safe operation trend and whether to issue a safety warning message is determined according to the operation characteristic state.

[0092] It is understandable that the intelligent assessment module can accurately judge the operating trend of the silt dam according to the upstream water level of the silt dam and issue safety warning information in time; when the upstream water level reaches or exceeds the normal water storage level, the module will immediately determine it as a dangerous operating trend and trigger the early warning mechanism to ensure that inspectors and managers can respond quickly and take necessary measures to ensure the safety of the silt dam; this function significantly improves the real-time and response speed of the system, providing a strong guarantee for the safe operation of the silt dam.

[0093] Specifically, the intelligent assessment module determines the operational status of the silt dam based on the results of the safe operation trend and the upstream and downstream water level difference, and determines whether to issue a safety warning message, including:

[0094] If the upstream and downstream water level difference is greater than the preset water level difference or the upstream and downstream water level difference is less than the water level difference threshold, the operation status of the silt dam is determined to be a dangerous operation status and a safety warning message is issued;

[0095] If the upstream and downstream water level difference is less than or equal to the preset water level difference and the upstream and downstream water level difference is greater than or equal to the water level difference threshold, the operation status of the silt dam is determined to be a safe operation status;

[0096] The upstream and downstream water level difference is the difference between the upstream water level and the downstream water level, that is, the upstream and downstream water level difference = the upstream water level of the silt dam - the downstream water level of the silt dam.

[0097] In implementation, the upper limit of the design water level difference range is equal to the preset water level difference, and the lower limit of the design water level difference range is the water level difference threshold. Therefore, the water level difference threshold < the preset water level difference is a relatively small number. Usually, small-scale silt dams have relatively small storage capacity and low dam height, and are relatively sensitive to water level changes. Their corresponding design water level difference range is 0.1 to 0.3 meters. Medium-sized silt dams have moderate storage capacity and dam height, and are relatively more capable of withstanding water level changes. Their corresponding design water level difference range is 0.3 to 0.5 meters. Large-scale silt dams have large storage capacity, high dam height, and more complex structure. They have a certain ability to withstand water level changes. In order to ensure their safe operation, the corresponding design water level difference range is 0.5 to 1 meter.

[0098] It is understandable that when a dam is not operating safely, the water level difference between the upstream and downstream sides of the dam will increase. The reasons include: (1) siltation, that is, a large amount of sediment accumulates upstream of the dam, causing the effective storage capacity of the dam to gradually decrease; in a river basin with severe soil erosion, sediment enters the dam with the water flow and accumulates, so the water level will rise rapidly when the storage capacity decreases with the same flow of incoming water, resulting in the upstream water level being much higher than the downstream water level; (2) uneven settlement, if the dam body settles unevenly, the water level on one side of the dam body may be significantly higher than the other side. When uneven settlement occurs on the upstream side of the dam body, the storage capacity of the settlement area will be partially reduced, that is, the water storage space in the area will become smaller, which will cause the upstream water level to rise relatively when the inflow flow remains unchanged; settlement on the downstream side of the dam body will change the water level benchmark downstream. If the area behind the dam sinks, from a macro perspective, The water level downstream is relatively lower when viewed from above, which will increase the apparent water level difference between upstream and downstream. (3) Seepage problems. When the seepage of the dam body or dam foundation deteriorates, abnormal water level changes will occur. For example, pipe gushing occurs at the dam foundation, and groundwater forms a concentrated seepage channel inside the dam foundation. The water level on the downstream side of the dam body may suddenly rise while the water level on the upstream side may drop. This water level change indicates that the dam body may be suffering from seepage damage. If not handled in time, it will lead to serious consequences such as dam collapse and dam break. (4) Overtopping danger. When the water level in the dam exceeds the dam crest elevation, an overtopping danger will occur. This is usually caused by excessive flood flow that exceeds the water-passing capacity of flood discharge facilities such as spillways, or by failure of flood discharge facilities (such as blockage, damage, etc.). The present invention does not consider the situation of excessive extreme flood volume, but only considers the safe operation of silt dams with normal water volume.

[0099] Therefore, in practice, siltation problems and uneven settlement on the upstream side usually cause the water level upstream of the check dam to be greater than the water level downstream, while seepage problems and uneven settlement on the downstream side cause the water level downstream of the check dam to be greater than the water level upstream.

[0100] It is understandable that the intelligent assessment module also combines the upstream and downstream water level differences to further determine the operating status of the silt dam and issue an early warning accordingly. By comparing the upstream and downstream water level differences with the designed water level difference range, it can accurately determine whether the silt dam is in a dangerous operating state. When the water level difference exceeds the preset range, the intelligent assessment module will issue an early warning in time to remind relevant personnel to pay attention and take corresponding measures. This function not only improves the system's monitoring accuracy of the operating status of the silt dam, but also helps to promptly discover and deal with potential safety hazards.

[0101] Specifically, the evaluation and analysis module determines the cause of the dangerous operation according to the determination result of the dangerous operation state and the upstream and downstream water level difference, including:

[0102] If the upstream and downstream water level difference is greater than the preset water level difference, the cause of the dangerous operation is determined according to the historical average speed and the unit speed change frequency;

[0103] It is understandable that if the water level difference is caused by excessive siltation, the water flow rate of the spillway may show a gradual change trend. The initial water flow rate should gradually increase, but as the siltation situation worsens, the increase in the water flow rate may be restricted (because siltation may cause the spillway inlet to be raised, the internal roughness to increase, the outlet to be blocked, etc.). For example, when the inlet is raised, it can only discharge normally at a higher water level, and the internal siltation will increase the water flow resistance. At this time, the water flow rate may reach a peak in a short time and then begin to decline or fluctuate, and no longer simply increase with the increase in the water level difference. Added; When the water level difference is caused by uneven settlement, the water flow rate of the spillway may change suddenly. For example, in the early stage of settlement, if the local elevation of the spillway inlet is reduced, water may suddenly rush in, the water flow rate increases rapidly and the speed distribution is uneven. In addition, due to the complex water flow pattern caused by settlement, the speed will fluctuate, unlike the speed change caused by siltation, which has a more regular trend. Therefore, when the upstream and downstream water level difference is greater than the preset water level difference, the cause of the dangerous operation is determined based on the current water flow rate (whether it is rising or falling overall) and the unit speed change frequency (whether the speed fluctuates).

[0104] If the upstream and downstream water level difference is less than the water level difference threshold, the cause of the dangerous operation is determined based on the dam body seepage volume and the dam body seepage pressure. It can be understood that in a normally operating silt dam, the upstream water level should be higher than the downstream water level. Under the action of gravity, water seeps from the upstream through the dam body (including the dam body itself and the dam foundation) to the downstream. When the upstream and downstream water level difference is less than the water level difference threshold, it means that the operating condition of the dam body has deviated from normal expectations. It may be due to pipe gushing in the dam foundation, and water forms a concentrated seepage channel inside the dam foundation. The water level on the downstream side of the dam body may suddenly rise while the water level on the upstream side may drop.

[0105] It is understandable that the evaluation and analysis module accurately analyzes the specific reasons for the dangerous operation of the silt dam by comprehensively considering multiple parameters such as the upstream and downstream water level difference, the current water flow rate, the unit speed change frequency, the dam body seepage volume and the dam body seepage pressure. This multi-dimensional and comprehensive analysis method not only improves the system's assessment accuracy of the operating status of the silt dam, but also helps to quickly locate potential safety hazards, providing strong data support for subsequent maintenance and management; secondly, the evaluation and analysis module adopts different analysis strategies for different situations of upstream and downstream water level differences. When the upstream and downstream water level difference is greater than the preset water level difference, the module analyzes the changes in the water flow rate and the unit speed change frequency The trend can accurately determine whether the dangerous operation is caused by excessive siltation or uneven settlement. This differentiated analysis method not only improves the flexibility of the system, but also helps to more accurately identify the root cause of the problem, so as to take more targeted countermeasures; furthermore, when the upstream and downstream water level difference is less than the water level difference threshold, the evaluation and analysis module can timely discover the possible seepage damage such as pipe burst in the dam body by monitoring the changes in the seepage volume and seepage pressure of the dam body. This function not only helps to prevent the occurrence of serious consequences such as dam collapse and dam break, but also provides inspectors and managers with more comprehensive safety warning information, enabling them to take necessary preventive measures in time.

[0106] Specifically, the evaluation and analysis module determines the cause of the dangerous operation according to the historical average speed and the unit speed change frequency, including:

[0107] If the historical average speed is greater than the design range of the water flow speed and / or the unit speed change frequency is greater than or equal to the preset change frequency, it is judged that the cause of the dangerous operation is uneven settlement on the upstream side of the dam body; it is understandable that when uneven settlement occurs on the upstream side of the dam body, the relative elevation of the spillway inlet will change, and the sinking of part of the inlet area will reduce the elevation of the water inlet in this area, which will cause the water flow to enter the spillway at a lower water level. According to the continuity equation (flow rate Q = water flow cross-sectional area A × flow velocity V), it can be seen that when the water flow cross-sectional area has not yet fully played its role, the water flow that enters in advance will have a faster flow rate due to the relatively small water flow cross-sectional area;

[0108] If the historical average speed is less than the design range of the water flow speed and the unit speed change frequency is less than the preset change frequency, it is judged that the cause of the dangerous operation is severe soil erosion upstream of the silt dam; it is understandable that severe soil erosion upstream of the silt dam will lead to a high sediment content in the flood flowing through the silt dam, resulting in serious siltation upstream of the silt dam and thus causing changes in the water flow rate.

[0109] In practice, the preset change frequency has a value range greater than 1 time / hour. It is understandable that when there are no abnormal conditions, the water flow velocity of the spillway of the silt dam is relatively stable. Under normal circumstances, the water flow velocity changes less frequently per hour (for example, within a unit period of 1 to 2 hours), and the velocity changes may be around 0 to 0.2 times. This is because normal water flow is mainly affected by stable inflow, water level changes, and conventional environmental factors (such as small changes in temperature and wind speed), and its velocity changes are relatively gentle. When the dam body suddenly settles, the water flow pattern will change dramatically in a short period of time. The settlement may cause the shape of the spillway cross-section to change and the water flow direction to become turbulent. In some situations, the water velocity will frequently fluctuate in local areas. Within a unit period of 1 to 2 hours, the number of velocity changes may increase significantly, possibly reaching 2 to 3 times or even more. Therefore, in order to promptly detect abnormal situations such as sudden settlement of the dam body, the preset change frequency can be set to 1 time / hour to 1.5 times / hour. The reason for this setting is that under normal circumstances, the number of velocity changes is far lower than this value, and once the dam body suddenly settles, the velocity change frequency is likely to exceed this preset value, thereby effectively distinguishing between normal water velocity fluctuations and abnormal velocity changes caused by dam body settlement, and providing a basis for timely engineering measures.

[0110] Specifically, the evaluation and analysis module determines the cause of the dangerous operation according to the dam body seepage volume and dam body seepage pressure, including:

[0111] If the seepage volume of the dam body is greater than the designed seepage volume and the seepage pressure of the dam body is greater than the designed seepage pressure, it is determined that the cause of the dangerous operation is the existence of severe seepage in the dam body;

[0112] It can be understood that the design seepage volume is the normal seepage volume range calculated during the dam body design stage based on the dam body's structure, materials, geological conditions, and expected hydraulic conditions. The design seepage pressure is also calculated based on hydraulics under normal operating conditions. When the actual dam body seepage volume is greater than the design seepage volume, this indicates that the seepage situation inside the dam body exceeds normal expectations. It may be that cracks or holes appear in the dam body, or the permeability of local materials changes. At the same time, the change in seepage volume will be accompanied by a change in seepage pressure. When the dam body seepage pressure is greater than the design seepage pressure, it further indicates that the hydraulic conditions inside the dam body have changed abnormally. When both the seepage volume and the seepage pressure are greater than their design values, it clearly indicates that there is a serious seepage problem inside the dam body.

[0113] If the seepage volume of the dam body is less than or equal to the designed seepage volume and the seepage pressure of the dam body is less than or equal to the designed seepage pressure, it is determined that the cause of the dangerous operation is uneven settlement on the downstream side of the dam body;

[0114] It can be understood that when the seepage volume and seepage pressure of the dam body are within the design range, it means that the basic seepage state of the dam body is normal from the perspective of seepage, and there are no obvious abnormal seepage conditions such as cracks and pipe bursts; this means that it is caused by uneven settlement on the downstream side of the dam body.

[0115] After issuing a safety warning signal, reservoir inspectors can take preventive measures and / or conduct actual inspections and secondary judgments in advance based on the analyzed causes of dangerous operation (i.e., use existing technologies to determine the reliability of the judged dangerous operation causes based on the analyzed dangerous operation causes. For example, if there is severe soil erosion upstream, the amount of siltation upstream can be determined through existing detection methods to secondary judge the reliability of the dangerous operation causes) to ensure the safety of the silt dam.

[0116] It is understandable that the evaluation and analysis module can accurately determine the specific reasons for the dangerous operation of the silt dam by comprehensively considering multiple key parameters such as the historical average speed, unit speed change frequency, dam body seepage and dam body seepage pressure. This multi-dimensional and comprehensive analysis method not only improves the system's evaluation accuracy of the operating status of the silt dam, but also helps to quickly locate potential safety hazards, and provides strong data support for subsequent safety warnings and emergency responses; secondly, the evaluation and analysis module adopts differentiated judgment criteria for different dangerous operation reasons (for example, when the historical average speed is greater than the design range of the water flow speed or the unit speed change frequency is abnormal, the module will judge that uneven settlement has occurred on the upstream side of the dam; and when the historical average speed is less than the design range and the unit speed change frequency is normal, it is judged that soil erosion upstream of the silt dam is serious), which not only improves the flexibility of the system but also helps to more accurately identify the root cause of the problem, so as to take more targeted countermeasures; thirdly, the evaluation and analysis module uses differentiated judgment criteria in judging different dangerous operation reasons (for example, when the historical average speed is greater than the design range of the water flow speed or the unit speed change frequency is abnormal, the module will judge that uneven settlement has occurred on the upstream side of the dam; and when the historical average speed is less than the design range and the unit speed change frequency is normal, it is judged that soil erosion is serious upstream of the silt dam), which not only improves the flexibility of the system but also helps to more accurately identify the root cause of the problem, so as to take more targeted countermeasures; thirdly, the evaluation and analysis module uses differentiated judgment criteria in judging When the dam seepage situation is detected, by comparing the actual dam seepage volume and seepage pressure with the design values, the possible serious seepage phenomenon inside the dam can be discovered in time, which is helpful to prevent safety accidents caused by seepage damage to the dam, and also provides more comprehensive safety warning information for inspectors and managers, so that they can take necessary preventive measures in advance; in addition, the evaluation and analysis module can also judge whether uneven settlement has occurred on the downstream side of the dam body according to whether the dam seepage volume and seepage pressure are normal or not. This judgment method improves the system's comprehensive monitoring capability of the dam body's operating status; finally, after issuing a safety warning signal, the evaluation and analysis module can also provide reservoir inspectors with actual detection and secondary judgment basis. Inspectors can use corresponding detection methods to verify and confirm the dangerous operation reasons analyzed by the module, so as to ensure the safety of the silt dam; this human-machine combined evaluation method not only improves the reliability and accuracy of the system, but also helps to improve the professional skills and emergency response capabilities of inspectors.

[0117] See also Figure 4 As shown, it is a step diagram of the method for intelligently evaluating safe operation of a silt dam according to an embodiment of the present invention. The embodiment of the present invention also provides a method for intelligently evaluating safe operation of a silt dam, comprising:

[0118] Step S1, obtaining the design data of the silt dam and collecting the seepage volume and seepage pressure at each key position of the dam body, the upstream water level of the silt dam, the downstream water level of the silt dam and the water flow rate of the spillway in real time, and drawing a speed time domain diagram of the water flow rate of the spillway;

[0119] Step S2, determining an operation characteristic trend of the silt dam according to the upstream water level of the silt dam and determining whether to issue a safety warning message according to the operation characteristic trend;

[0120] Step S3, determining the operation status of the silt dam according to the operation status trend of the silt dam and the upstream and downstream water level difference, and determining whether to issue a safety warning information according to the operation status;

[0121] Step S4, determining the historical average speed and the unit speed change frequency within a unit period according to the dangerous operation state control evaluation and analysis module;

[0122] Step S5, determining an analysis method of the cause of the dangerous operation according to the magnitude relationship between the upstream water level and the downstream water level to determine the cause of the dangerous operation;

[0123] In implementation, step S5 includes step S51 and step S52, wherein:

[0124] Step S51, determining an analysis method for the cause of dangerous operation according to the magnitude relationship between the upstream water level and the downstream water level, including:

[0125] Determine the cause of the dangerous operation based on the historical average speed and the unit speed change frequency;

[0126] Or, determining the cause of the dangerous operation based on the dam body seepage volume and dam body seepage pressure;

[0127] Step S52, determining the cause of the dangerous operation according to the determined analysis method.

[0128] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0129] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent evaluation system for safe operation of a silt dam, characterized in that: include: A data acquisition module, including a data acquisition unit for acquiring design data of the silt dam and a data monitoring unit for real-time acquisition of seepage volume and seepage pressure at key locations of the silt dam, the upstream water level of the silt dam, the downstream water level of the silt dam, and the water flow rate of the spillway; The design data include normal water storage level, design range of spillway water flow rate, design seepage volume and design seepage pressure; A data analysis module connected to the data acquisition module, for drawing a velocity time domain diagram according to the water flow velocity of the spillway, and determining the historical average velocity and the unit velocity change frequency within a unit period according to the velocity time domain diagram; An intelligent evaluation module, which is connected to the data acquisition module, is used to determine the operation characterization trend of the silt dam according to the upstream water level of the silt dam, determine the operation characterization state of the silt dam in combination with the upstream and downstream water level difference, and determine whether to issue a safety warning information according to the operation characterization trend or the operation characterization state; The operation characterization trend includes a dangerous operation trend and a safe operation trend, and the operation characterization state includes a dangerous operation state and a safe operation state; An evaluation and analysis module, which is respectively connected to the data acquisition module, the data analysis module and the intelligent evaluation module, and is used to determine an analysis method of the cause of the dangerous operation according to the dangerous operation state, the upstream water level and the downstream water level, including: Determine the cause of the dangerous operation based on the historical average speed and the unit speed change frequency; Or, determining the cause of the dangerous operation based on the dam body seepage volume and dam body seepage pressure; Among them, the reasons for the dangerous operation include uneven settlement of the dam body, excessive siltation and seepage in the dam body.

2. The intelligent evaluation system for safe operation of silt dam according to claim 1 is characterized in that: The data monitoring unit comprises: Several seepage monitoring devices are located at key positions of the silt dam. A single seepage monitoring device includes a flow meter and a piezometer to determine the seepage volume and seepage pressure at the corresponding position. A plurality of velocity sensors are evenly arranged at various positions of the spillway to determine the water flow velocity at each position, and the water flow velocity of the spillway is determined based on the average value of the water flow velocity at each position; A plurality of water level gauges are installed at corresponding positions upstream and downstream of the silt dam to determine the upstream water level and downstream water level of the silt dam.

3. The intelligent evaluation system for safe operation of silt dam according to claim 1 is characterized in that: The data analysis module filters out invalid water-passing speeds in the speed time domain diagram before any time to obtain a standard water-passing speed, and determines a historical average speed at a corresponding time according to an average value of each of the standard water-passing speeds.

4. The intelligent evaluation system for safe operation of silt dams according to claim 3 is characterized in that: The data analysis module determines a unit speed time domain diagram corresponding to any time to determine the number of maximum values ​​and the number of minimum values ​​in the unit speed time domain diagram, determines the number of changes according to the number of maximum values ​​and the number of minimum values, and determines the unit speed change frequency according to the number of changes and the unit period; Wherein, the time length of the unit speed time domain diagram is a unit period.

5. The intelligent evaluation system for safe operation of silt dam according to claim 1 is characterized in that: The intelligent assessment module determines the operation trend of the silt dam according to the upstream water level of the silt dam and determines whether to issue a safety warning message. include, If the upstream water level is greater than or equal to the normal water storage level, the operation characteristic trend of the silt dam is determined to be a dangerous operation trend and a safety warning message is issued; If the upstream water level is lower than the normal water storage level, it is determined that the operation characteristic trend of the silt dam is a safe operation trend and whether to issue a safety warning message is determined according to the operation characteristic state.

6. The intelligent evaluation system for safe operation of silt dams according to claim 5 is characterized in that: The intelligent evaluation module determines the operation status of the silt dam and determines whether to issue a safety warning message based on the determination result of the safety operation trend and the upstream and downstream water level difference, including: If the upstream and downstream water level difference is greater than the preset water level difference or the upstream and downstream water level difference is less than the water level difference threshold, the operation status of the silt dam is determined to be a dangerous operation status and a safety warning message is issued; If the upstream and downstream water level difference is less than or equal to the preset water level difference and the upstream and downstream water level difference is greater than or equal to the water level difference threshold, the operation status of the silt dam is determined to be a safe operation status; The upstream and downstream water level difference is the difference between the upstream water level and the downstream water level.

7. The intelligent evaluation system for safe operation of silt dams according to claim 1 is characterized in that: The evaluation and analysis module determines the cause of the dangerous operation according to the determination result of the dangerous operation state and the upstream and downstream water level difference, including: If the upstream and downstream water level difference is greater than the preset water level difference, the cause of the dangerous operation is determined according to the historical average speed and the unit speed change frequency; If the upstream and downstream water level difference is less than the water level difference threshold, the cause of the dangerous operation is determined based on the dam body seepage volume and the dam body seepage pressure.

8. The intelligent evaluation system for safe operation of silt dams according to claim 7 is characterized in that: The evaluation and analysis module determines the cause of the dangerous operation according to the historical average speed and the unit speed change frequency, including: If the historical average speed is greater than the design range of the water flow speed and / or the unit speed change frequency is greater than or equal to the preset change frequency, it is judged that the cause of the dangerous operation is uneven settlement on the upstream side of the dam body; If the historical average speed is less than the design range of the water flow speed and the unit speed change frequency is less than the preset change frequency, it is judged that the cause of the dangerous operation is serious soil and water loss upstream of the silt dam.

9. The intelligent evaluation system for safe operation of silt dams according to claim 7 is characterized in that: The evaluation and analysis module determines the cause of the dangerous operation according to the dam body seepage volume and the dam body seepage pressure, including: If the seepage volume of the dam body is greater than the designed seepage volume and the seepage pressure of the dam body is greater than the designed seepage pressure, it is determined that the cause of the dangerous operation is the existence of severe seepage in the dam body; If the seepage volume of the dam body is less than or equal to the designed seepage volume and the seepage pressure of the dam body is less than or equal to the designed seepage pressure, it is determined that the cause of the dangerous operation is uneven settlement on the downstream side of the dam body.

10. An intelligent evaluation method for safe operation of a silt dam applied to the intelligent evaluation system for safe operation of a silt dam according to any one of claims 1 to 9, characterized in that: include, Obtain the design data of the silt dam and collect the seepage volume and seepage pressure at each key position of the dam body, the upstream water level of the silt dam, the downstream water level of the silt dam and the water flow rate of the spillway in real time, and draw the water flow rate of the spillway and draw a speed time domain diagram; Determine the operation trend of the silt dam according to the upstream water level of the silt dam and determine whether to issue a safety warning information according to the operation trend; Determine the operational status of the silt dam based on the operational trend of the silt dam and the upstream and downstream water level difference, and determine whether to issue a safety warning information based on the operational status; Determine the historical average speed and the unit speed change frequency within a unit period according to the dangerous operation state control evaluation and analysis module; Determine the analysis method of the cause of the dangerous operation according to the magnitude relationship between the upstream water level and the downstream water level to determine the cause of the dangerous operation; The analysis method for determining the cause of dangerous operation according to the magnitude relationship between the upstream water level and the downstream water level includes: Determine the cause of the dangerous operation based on the historical average speed and the unit speed change frequency; Alternatively, the cause of the dangerous operation is determined based on the seepage volume and seepage pressure of the dam body.

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