A concrete core dam reliability analysis platform and analysis method based on dam material parameter correlation characteristics

Abstract

This invention discloses a reliability analysis platform and method for concrete core wall dams based on the correlation characteristics of dam material parameters, relating to the field of water conservancy engineering safety inspection. It includes a dam material parameter acquisition and preprocessing module and an intelligent reliability assessment module. The dam material multi-source parameter acquisition and preprocessing module comprises an in-situ mechanical parameter detection module, a material physical parameter detection module, a dam body geometric and geological parameter detection module, and an asphalt concrete core wall specific parameter detection module. The in-situ mechanical parameter detection module includes a soil shear strength testing device comprising a base, a first lifting chamber fixedly connected to the surface of the base, a control panel fixedly connected to the side of the first lifting chamber, and a first lifting motor fixedly connected inside the first lifting chamber. This invention achieves intelligent and accurate reliability assessment of the core wall dam by collaboratively acquiring various specific parameters through multiple modules, completing parameter standardization preprocessing, and integrating deep learning.

Description

Technical Field

[0001] This invention relates to the field of safety testing in water conservancy projects, specifically to a reliability analysis platform and method for concrete core wall dams based on the correlation characteristics of dam material parameters. Background Technology

[0002] Hydropower, as a green and clean energy source, boasts advantages over traditional power generation methods, including less pollution, higher efficiency, and lower cost, making it an indispensable support for my country's goal of achieving a "dual carbon" emission standard. To fully leverage the energy potential of hydropower, various regions in China have successively promoted the planning and construction of a number of high dams and large reservoirs, among which several major projects, represented by asphalt concrete core wall dams, have been completed or commenced. Asphalt concrete core wall dams possess comprehensive advantages such as relatively simple construction, controllable construction costs, good seismic performance, and less susceptibility to external climate and sunlight, making their dam sites frequently chosen in the harsh environments of western my country. Due to the special geographical location and environment, their structural safety has always been a key focus in dam design and research. Dam construction materials, as key factors controlling the coordinated deformation and seepage prevention performance of asphalt concrete core wall dams, exhibit different mechanical properties and engineering characteristics at different temporal and spatial scales. Currently, deterministic analysis methods are insufficient to fully understand their uncertainties and cannot provide a comprehensive and objective evaluation of dam safety. Therefore, scientifically and rationally considering the randomness and uncertainty of dam construction material parameters is of great engineering significance and social value for ensuring national water resource security, enhancing the risk prevention and control capabilities of major infrastructure, and improving the safety emergency management system.

[0003] Meanwhile, existing equipment in the in-situ mechanical parameter monitoring module includes a vane shear tester. This tester works by inserting a vane into the soil, using sensors to detect the soil's shear strength, and recording and transmitting the collected data to a processing terminal. The vane shear tester requires the probe to be inserted into a pre-drilled hole in the soil before shear strength testing can be conducted. Existing equipment requires pre-drilling holes using external drilling equipment before inserting the probe for data collection. This process of splitting procedures and alternating equipment usage makes the on-site testing process cumbersome and time-consuming. Furthermore, the testing process relies on manual application of shear torque, making it difficult to stably control the torque loading rate, which easily leads to large dispersion and significant fluctuations in the test data, directly affecting the accuracy and stability of the in-situ test results.

[0004] In view of the above, this application provides a reliability analysis platform and analysis method for concrete core wall dams based on the correlation characteristics of dam material parameters to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a reliability analysis platform and method for concrete core wall dams based on the correlation characteristics of dam material parameters.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, the present invention provides a reliability analysis platform for concrete core wall dams based on the correlation characteristics of dam construction material parameters, including a dam construction material parameter acquisition and preprocessing module and an intelligent reliability assessment module. The dam construction material multi-source parameter acquisition and preprocessing module includes an in-situ mechanical parameter detection module, a material physical parameter detection module, a dam body geometric and geological parameter detection module, and an asphalt concrete core wall specific parameter detection module. The intelligent reliability assessment module includes a stochastic parameter modeling and sampling module, a stochastic static response simulation module, a deep learning proxy computing module, and a reliability analysis and rating module.

[0007] Preferably, the in-situ mechanical parameter detection module includes a soil shear strength testing device. The soil shear strength testing device includes a base, a first lifting chamber fixedly connected to the inner side of the base, a control panel fixedly connected to the right surface of the first lifting chamber, a first lifting motor fixedly connected inside the first lifting chamber, a first lead screw fixedly connected to the output end of the first lifting motor, the end of the first lead screw away from the first lifting motor being rotatably connected to the inner bottom surface of the first lifting chamber, a transmission block threaded onto the surface of the first lead screw, a second lifting chamber fixedly connected to the side of the transmission block away from the first lead screw, a second lifting motor fixedly connected inside the second lifting chamber, a second lead screw fixedly connected to the output end of the second lifting motor, a second lead screw rotatably connected to the inner bottom surface of the second lifting chamber, a fixing plate threaded onto the surface of the second lead screw, the fixing plate slidingly engaging within the second lifting chamber, and a through-type rotating motor fixedly connected inside the fixing plate.

[0008] Secondly, this invention provides a reliability analysis method for asphalt concrete core wall dams based on the correlation characteristics of dam material parameters, the process of which is as follows: S1: On-site dam body parameter acquisition, simultaneously obtaining four types of parameters: in-situ soil shear strength data obtained by the soil shear strength testing equipment; physical parameters of dam material density and moisture content transmitted by the material physical monitoring equipment; dam body structural dimensions and dam foundation geological parameters transmitted by the dam body geometric geological monitoring equipment; and core wall mechanical and seepage prevention performance parameters transmitted by the asphalt concrete core wall special monitoring equipment. S2: Random parameter modeling and sampling. The collected Duncan-Zhang EB dam material parameters of the real-world asphalt concrete core wall dam project are input into the R-Teng Copula model for training. The optimal marginal probability distribution function of the Duncan-Zhang EB parameters is found, that is, the correlation between the core parameters of Duncan-Zhang EB is found, which facilitates the subsequent automatic simulation to generate the values ​​of the core parameters under different working conditions. S3: Deep learning agent computation, using the trained R-Teng Copula function to generate the values ​​of the Duncan-Zhang EB corresponding parameters of the conditional samples under different working conditions; S4: Intelligent Reliability Analysis. This method utilizes on-site measured data from all dimensions to construct an Abaqus core wall dam model. It integrates sample condition parameters calculated using the R-Teng Copula function under various Duncan-Zhang EB conditions. Based on the soil shear strength measured by the soil shear strength testing equipment and the relevant parameters that can be directly derived, it selects and configures a set of Duncan-Zhang EB condition sample parameters that are closest to the actual working conditions. The method then runs to predict the continuity of dam settlement for the current core wall dam, thereby completing the reliability analysis of the current core wall dam.

[0009] Beneficial effects: (1) This invention integrates the two dimensions of uncertainty and parameter dependence of dam material parameters through the evaluation method, and couples the high-dimensional joint distribution modeling of R-Teng Copula with random static response simulation data. It breaks through the limitation of the existing technology that regards dam material parameters as independent normal variables, accurately characterizes the non-normal distribution and high-dimensional correlation characteristics of material parameters, and makes the reliability analysis results more consistent with the actual stress and deformation law of asphalt concrete core wall dam.

[0010] (2) This invention integrates the R-Teng Copula function with the dependent random sample generation method of number theory point selection and conditional sampling to realize intelligent and efficient calculation of dam reliability, accurately capture the influence law of parameter correlation on the failure probability of dam body, and the trained R-Teng Copula function generates the values ​​of Duncan-Zhang EB corresponding parameters of a large number of sample items, solving the problems of high calculation cost of traditional reliability analysis, inability to consider high-dimensional parameter correlation, insufficient existing core wall dam reference data, and high manpower and material cost of on-site data collection.

[0011] (3) The in-situ mechanical parameter monitoring device of the present invention can simultaneously complete in-situ hole formation and shear strength acquisition by integrating the drilling and vane shearing operation mode, avoiding the alternating operation of multiple devices and manual loading disturbance, ensuring the continuity of in-situ mechanical parameter acquisition, and significantly improving the test accuracy of Duncan-Zhang EB model parameters.

[0012] (4) The in-situ mechanical monitoring equipment of the present invention adopts a portable integrated structure design. No external drilling equipment is required during the entire testing process. The loading rate is controlled stably during the test. It is suitable for complex outdoor working conditions such as dam foundation and filling site. It simplifies the testing process, shortens the operation time, and reduces the on-site operation and maintenance costs. Attached Figure Description

[0013] Figure 1 Platform structure diagram; Figure 2 This is a schematic diagram of the entire left front of the present invention; Figure 3 This is a schematic diagram of the entire left rear of the present invention; Figure 4 This is a schematic cross-sectional view of the overall structure of the present invention in its initial state; Figure 5 For the present invention Figure 4 Enlarged view of point A; Figure 6 For the present invention Figure 4 Enlarged view of point B; Figure 7 For the present invention Figure 4 Enlarged view of point C; Figure 8 For the present invention Figure 4 Enlarged diagram of point D; Figure 9 For the present invention Figure 4 Enlarged view of point E; Figure 10 This is a schematic diagram of the transmission of the measuring mechanism of the present invention; Figure 11 This is a schematic diagram of the overall measurement state of the present invention; Figure 12 This is a schematic cross-sectional view of the overall structure of the measurement state of the present invention; Figure 13 For the present invention Figure 12 Enlarged schematic diagram at point F; Figure 14 For the present invention Figure 12 Enlarged schematic diagram at point G; Figure 15 Schematic diagram of a three-dimensional structural model of an asphalt concrete core wall dam; Figure 16 A comparison diagram of the original and conditional samples of dam construction materials; Reference numerals: 1. Base; 12. Control panel; 13. First lifting chamber; 14. Second lifting chamber; 15. First lifting motor; 16. First lead screw; 17. Second lifting motor; 18. Second lead screw; 19. Transmission block; 2. Fixing plate; 21. Rotating motor; 22. First transmission rod; 23. Electric push rod; 24. Fixing frame; 25. Limiting ring; 26. Bearing; 3. Rotating cylinder; 31. Helical drill bit; 32. Rotating disk; 33. Rotating shaft 34. Second transmission rod; 35. Third transmission rod; 36. Fourth transmission rod; 37. Return spring; 38. Fixed ring; 39. Measuring motor; 310. Gear; 311. Crown gear; 312. First rotating ring; 313. Upper measuring arm; 314. Fifth transmission rod; 315. Lower measuring arm; 316. Pressure sensor; 317. Second rotating ring; 318. Rotating column; 319. Cross plate; 320. Cross groove; 321. Partition plate. Detailed Implementation

[0014] The foregoing and other technical contents, features and effects of the present invention shall be referenced in conjunction with the following. Figures 1 to 16 As will be clearly shown in the detailed description of the embodiments, the structural contents mentioned in the following embodiments are all with reference to the accompanying drawings.

[0015] In a first aspect, the present invention provides a reliability analysis platform for concrete core wall dams based on the correlation characteristics of dam construction material parameters.

[0016] Example 1, such as Figure 1 , Figure 15 and Figure 16 As shown, a reliability analysis platform for concrete core wall dams based on the correlation characteristics of dam material parameters is provided. The dam material parameter acquisition and preprocessing module and the intelligent reliability assessment module are connected. The dam material multi-source parameter acquisition and preprocessing module includes an in-situ mechanical parameter detection module, a material physical parameter detection module, a dam body geometric and geological parameter detection module, and an asphalt concrete core wall specific parameter detection module. This reliability analysis platform for asphalt concrete core wall dams, based on the correlation characteristics of dam material parameters, revolves around the entire process of accurate acquisition and preprocessing of multi-source parameters, high-dimensional parameter dependency modeling, stochastic static numerical simulation, and intelligent reliability analysis and rating. The on-site parameter acquisition equipment and the intelligent reliability assessment module work together to realize the analysis and evaluation of the safety and reliability of asphalt concrete core wall dams.

[0017] Example 2, as Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, a reliability analysis platform for concrete core wall dams based on the correlation characteristics of dam material parameters includes an in-situ mechanical parameter detection module. This module includes a soil shear strength testing device, which comprises a base 1 made of high-strength cast iron. The base 1 is heavy and structurally stable, providing stable operational support for the entire testing equipment. A first lifting chamber 13 is fixedly connected to the inner side of the base 1. The first lifting chamber 13 is a closed chamber structure welded from carbon steel, possessing dustproof and impact-resistant properties, used to protect the internal primary lifting drive. The first lifting chamber 13 has a control panel 12 fixedly connected to its right surface. The control panel 12 is a waterproof and dustproof industrial touch panel, suitable for outdoor dam construction sites, used for equipment start / stop, setting operating parameters, real-time display of test data, and signal relay. The first lifting chamber 13 has a first lifting motor 15 fixedly connected inside. The first lifting motor 15 is a servo motor with a brake, capable of precisely controlling the lifting stroke and operating speed with high positioning accuracy. The output end of the first lifting motor 15 is fixedly connected to a first lead screw 16, which is a high-precision ground ball screw for smooth transmission. With smooth operation and small clearance, the end of the first lead screw 16 furthest from the first lifting motor 15 is rotatably connected to the inner bottom surface of the first lifting chamber 13. A transmission block 19 is threaded onto the surface of the first lead screw 16. The transmission block 19 is made of alloy casting and has high thread fit precision, which can convert the rotational motion of the lead screw into linear lifting motion. The side of the transmission block 19 furthest from the first lead screw 16 is fixedly connected to the second lifting chamber 14. The second lifting chamber 14 adopts a closed chamber structure of the same material as the first lifting chamber 13 and is used to carry the secondary lifting drive assembly. The second lifting motor is fixedly connected inside the second lifting chamber 14. 17. The second lifting motor 17 also adopts a servo motor with a brake to realize precise start-stop and speed control of the secondary lifting mechanism. The output end of the second lifting motor 17 is fixedly connected to the second lead screw 18. The second lead screw 18 adopts a high-precision ground ball screw. The end of the second lead screw 18 away from the second lifting motor 17 is rotatably connected to the inner bottom surface of the second lifting chamber 14. The surface of the second lead screw 18 is threaded with a fixing plate 2. The fixing plate 2 adopts a high-strength alloy steel plate, which is rigid and not easily deformed. It is used to fix the drilling, rotation and measurement drive components and serves as the core mounting base of the lower working mechanism.

[0018] Specifically, in the initial standby state, the device, as Figure 2 , Figure 3As shown, the fixed plate 2 is located at the uppermost position of the second lead screw 18. The entire lifting mechanism is fully retracted, and the overall size of the equipment is compact, facilitating on-site transportation, storage, and relocation. When conducting in-situ soil shear strength testing, a start command is first issued through the control panel 12. The first lifting motor 15 is started first, driving the first lead screw 16 to rotate forward. Through threaded transmission, the transmission block 19 moves linearly up and down inside the first lifting chamber 13, simultaneously moving the second lifting chamber 14 as a whole, adjusting the secondary working components to the preset working height, and completing the first-level lifting and positioning. Then, the second lifting motor 17 is started, driving the second lead screw 18 to rotate. Relying on threaded engagement, the fixed plate 2 is fed downward in the vertical direction, simultaneously moving the drilling and measuring components assembled below the fixed plate 2 towards the soil, providing a continuous and stable feed driving force for subsequent in-situ drilling and shear strength testing. Throughout the entire lifting process, the control panel 12 monitors the motor operation status in real time, precisely controlling the feed rate and travel distance, completely avoiding feed deviations caused by manual operation, and ensuring operational consistency.

[0019] Example 3, as Figure 2 ... Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, a reliability analysis platform for concrete core wall dams based on the correlation characteristics of dam material parameters includes a fixed plate 2 with a through-type rotating motor 21 internally connected. The rotating motor 21 is a high-torque motor with stable speed and uniform torque output, which can stably output the rotational driving force required for drilling. The output end of the rotating motor 21 is fixedly connected to a first transmission rod 22, which is made of high-strength alloy steel with excellent bending and torsional resistance and can transmit rotational torque without loss. The bottom surface of the first transmission rod 22 is fixedly connected to a bearing 26, which is a wear-resistant heavy-duty slewing bearing to reduce rotational friction resistance and at the same time provide radial limiting for the coaxial transmission components. The function is as follows: An electric push rod 23 is fixedly connected to the lower surface of the fixed plate 2. The electric push rod 23 is an industrial-grade sealed push rod with rapid response and controllable stroke. It is used to assist in adjusting the relative height between the rotating motor 21 and the fixed frame 24. The output end of the electric push rod 23 is fixedly connected to the fixed frame 24. The fixed frame 24 is a carbon steel bent frame structure, serving as the mounting base for the limiting component. A limiting ring 25 is fixedly connected to the inner wall of the fixed frame 24. The limiting ring 25 is made of wear-resistant alloy ring, providing radial constraint to the lower rotating component. A rotating disk 32 is rotatably connected to the inner surface of the limiting ring 25. The rotating disk 32 is a thick-walled alloy disc with strong load-bearing capacity. The first transmission rod 22 slides... The rotating disk 32 is driven through the rotating cylinder. The first transmission rod 22 has a cross-shaped spline shape, allowing the two to slide relative to each other and rotate synchronously. A rotating cylinder 3 is fixedly connected to the lower surface of the rotating disk 32. The rotating cylinder 3 is made of seamless alloy steel pipe, providing protection and installation space for the internal transmission, gears, and measuring components. A solenoid drill bit 31 is fixedly connected to the lower surface of the rotating cylinder 3. The solenoid drill bit 31 is made of high wear-resistant hard alloy steel, with high cutting edge hardness, and is used for in-situ soil cutting and drilling operations. A partition 321 is fixedly connected inside the rotating cylinder 3. The partition 321 is made of alloy steel plate, dividing the interior of the rotating cylinder 3 into upper and lower chambers to achieve partitioned arrangement of components. The upper surface of the partition 321 rotates... A crown gear 311 is connected to the upper surface of the partition 321, and a measuring motor 39 is fixedly connected to it. The measuring motor 39 is a servo motor, which is specifically designed to provide power for the shearing measurement process. A gear 310 is fixedly connected to the output end of the measuring motor 39. The gear 310 meshes with the crown gear 311 to form a gear transmission pair, realizing torque reversal and transmission. A rotating shaft 33 is rotatably connected to the inner surface of the bearing 26. The rotating shaft 33 is a solid alloy steel shaft. A second transmission rod 34 is fixedly connected to the lower surface of the rotating shaft 33. The second transmission rod 34 slides through the crown gear 311 and completely penetrates the partition 321 to ensure continuous torque transmission from top to bottom.

[0020] Specifically, in the initial standby state, the device, as Figure 2 , Figure 3As shown, the first transmission rod 22 and the rotating disk 32 are in the initial position of sliding engagement, the gear 310 and the crown gear 311 are in a meshing and ready state, the helical drill bit 31 and the rotating cylinder 3 are retracted as a whole, the internal transmission components are in a stationary state, and the entire drilling transmission mechanism is in a ready-to-start state; when carrying out in-situ drilling operations, after completing the lifting and positioning in Embodiment 2, the control panel 12 starts the rotating motor 21, the rotating motor 21 drives the first transmission rod 22 to rotate, the first transmission rod 22 drives the rotating disk 32, the rotating cylinder 3 and the bottom helical drill bit 31 to rotate synchronously, and at the same time, the second lifting motor 17 is started, the output end of the second lifting motor 17 drives the second lead screw 18 to rotate, the rotation of the second lead screw 18 drives the fixed plate 2 to continuously move downward, and then drives the entire drilling structure to move downward, the helical drill bit 31 cuts the soil to complete the in-situ drilling operation, the whole set of equipment integrates the drilling function, no need to use external drilling equipment, and the process is simple; After the hole-forming operation is completed, the rotating motor 21 remains stationary, while the second lifting motor 17 starts. The output of the second lifting motor 17 drives the second lead screw 18 to rotate. The rotation of the second lead screw 18 causes the fixed plate 2 to continuously move downward. Simultaneously, the electric push rod 23, under the action of the ground, causes the fixed plate 2 to move downward relative to the fixed frame 24. The downward movement of the fixed plate 2 causes the first transmission rod 22 to move downward, which in turn causes the second transmission rod 34 to move downward. The second transmission rod 34 presses down on the fifth transmission rod 314, which in turn causes the fixed ring 38 to move downward, compressing the return spring 37 and simultaneously driving... The third transmission rod 35 and the fourth transmission rod 36 move downwards, causing the cross plate 319 to extend downwards along the cross groove 320, but not fully. The control panel 12 starts the measuring motor 39, which drives the gear 310 to rotate. Through meshing transmission, the gear 311 rotates, and the gear 311 synchronously drives the second transmission rod 34 that runs through it to rotate. The rotational power is transmitted to the measuring component in the lower cavity of the rotating cylinder 3, providing rotational power for the subsequent soil shear strength test. The bearing 26 provides rotational support for the rotating shaft 33 and the first transmission rod 22 throughout the entire process, ensuring the coaxiality of the transmission and avoiding component wear and jamming.

[0021] Example 4, as Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 14As shown, a reliability analysis platform for concrete core wall dams based on the correlation characteristics of dam material parameters includes a first rotating ring 312 rotatably connected to the lower surface of a partition plate 321, a second transmission rod 34 slidingly passing through the first rotating ring 312, an upper measuring arm 313 fixedly connected to the lower surface of the first rotating ring 312, the upper measuring arm 313 being an integral alloy arm body that rotates synchronously with the transmission rod, a fifth transmission rod 314 abutting against the lower surface of the second transmission rod 34, a second rotating ring 317 rotatably connected to the inner bottom surface of a rotating cylinder 3, and the fifth transmission rod 314 slidingly passing through... A second rotating ring 317 is passed through, and a lower measuring arm 315 is fixedly connected to the upper surface of the second rotating ring 317. A pressure sensor 316 is fixedly connected to the end of the lower measuring arm 315 away from the fifth transmission rod 314. The pressure sensor 316 is a high-precision miniature pressure sensing element used to collect the extrusion force and shear resistance signals during the shearing process. The pressure sensor 316 and the lower end of the upper measuring arm 313 are on the same height plane to ensure synchronous force detection and accurate data. A fixing ring 38 is fixedly connected to the lower surface of the fifth transmission rod 314. The fixing ring 38 adopts... The annular alloy component serves as the connecting base for the elastic reset assembly. The lower surface of the fixed ring 38 is elastically connected to the inner wall of the solenoid drill bit 31 via a reset spring 37. The reset spring 37 is made of high-strength alloy spring and provides axial reset force for the lower transmission assembly. A third transmission rod 35 is also fixedly connected to the lower surface of the fixed ring 38. A fourth transmission rod 36 is fixedly connected to the lower surface of the third transmission rod 35. A cross plate 319 is fixedly connected to the lower surface of the fourth transmission rod 36. The cross plate 319 is made of high-hardness wear-resistant alloy steel and is directly inserted into the soil to complete the shearing. The core component of the cutting operation, the spiral drill bit 31, has a rotating column 318 rotatably connected to its lower surface. The upper surface of the rotating column 318 has a through cross groove 320, which is slidably connected to the cross plate 319, allowing the cross plate 319 to be switched between retraction and extension. The pressure sensor 316, measuring motor 39, rotating motor 21, second lifting motor 17, and first lifting motor 15 are all electrically connected to the control panel 12, realizing fully automated logic control, power output regulation, and real-time acquisition and transmission of sensor data.

[0022] Specifically, in the initial standby state, the device, as Figure 4 , Figure 6As shown, the return spring 37 is in its naturally extended state, the fifth transmission rod 314, the third transmission rod 35, and the fourth transmission rod 36 move upward as a whole, the cross plate 319 is completely housed in the cross groove 320 inside the solenoid drill bit 31, the upper measuring arm 313 and the lower measuring arm 315 remain stationary, the pressure sensor 316 is in an unloaded state, all electrical components are on standby, and the entire measurement and shearing assembly is completely retracted; after the drilling operation is completed, the second lifting motor 17 starts, and the output end of the second lifting motor 17 drives the second lead screw 18 to rotate. The rotation of the second lead screw 18 causes the fixed plate 2 to continuously move downwards. Simultaneously, the electric push rod 23, under the action of the ground, causes the fixed plate 2 to move downwards relative to the fixed frame 24. The downward movement of the fixed plate 2 causes the first transmission rod 22 to move downwards, which in turn causes the second transmission rod 34 to move downwards. The second transmission rod 34 presses down on the fifth transmission rod 314, which in turn causes the fixed ring 38 to move downwards, compressing the return spring 37. At the same time, it causes the third transmission rod 35 and the fourth transmission rod 36 to move downwards, causing the cross plate 319 to move along the cross groove 32. The measuring arm extends downwards, but not fully, eventually penetrating the drilled soil. At this time, the measuring motor 39 continuously outputs power, which, through gear transmission and multi-stage transmission rods, sequentially drives the upper measuring arm 313 and lower measuring arm 315 to rotate synchronously. The cross plate 319 rotates along with the transmission system and applies shearing force to the soil. The shear resistance generated by the soil acts between the upper measuring arm 313 and the lower measuring arm 315. The pressure sensor 316 captures the pressure signal in real time and converts it into an electrical signal, which is then transmitted to the control panel 12. The control panel 12 completes data conversion. After calculation, the in-situ shear strength value of the soil is obtained and uploaded to the dam material parameter acquisition module of the reliability analysis platform. After a single test is completed, each motor stops operating in sequence. The second lifting motor 17 drives the second lead screw 18 to rotate in the reverse direction, which drives the fixed plate 2 to move upward and reset. The reset spring 37 rebounds and pushes the entire lower transmission assembly to move upward. The cross plate 319 is retracted into the cross groove 320. The upper measuring arm 313 and the lower measuring arm 315 return to their initial positions. The entire equipment is reset to standby mode and can be quickly switched to the next test point to carry out the operation.

[0023] Working principle of soil shear strength testing equipment: When the equipment is not in operation and is in standby mode, the entire lifting mechanism, drilling assembly, and shearing measurement assembly are all in a retracted state. The return spring 37 remains in its natural state, the cross plate 319 is stored inside the helical drill bit 31, and all motors and sensors are in standby mode, making the equipment easy to transport and store. When conducting in-situ soil shear strength testing, the operator sets the drilling depth, motor speed, feed rate, shearing time, and other operating parameters through the control panel 12. After starting the automatic operation program, the first lifting motor 15 drives the first lead screw 16 to rotate, which drives the transmission block 19 and the second lifting chamber 14 to complete the first-stage lifting and positioning, adjusting the working mechanism to the target working height. Subsequently, the second lifting motor 17 drives the second lead screw 18 to rotate, which drives the fixed plate 2 and the components below to continuously feed downwards. The rotating motor 21 starts synchronously, driving the first transmission rod 22, rotating cylinder 3, and helical drill bit 31 to rotate, which, together with the linear feed, completes the automated drilling of the soil. The equipment integrates drilling functions and does not require additional external drilling equipment, greatly simplifying the on-site procedures. After the hole is formed, the fixed plate 2 continues to descend, pushing the multi-stage transmission rods downward, compressing the return spring 37 and causing the cross plate 319 to extend and insert into the soil. At this time, the measuring motor 39 starts, driving the transmission rods and measuring arms to rotate synchronously through gear transmission. The cross plate 319 rotates and shears the soil. The soil shear resistance is collected in real time by the pressure sensor 316 and converted into an electrical signal. The control panel 12 calculates the accurate soil shear strength parameters. These parameters are used to calculate the deviatoric stress of the soil and serve as the core mechanical parameters of the Duncan-Zhang EB constitutive model of the dam material. The parameters are synchronously transmitted to the reliability analysis module to provide basic measured data for subsequent parameter distribution modeling, random sample generation, static response simulation, and intelligent reliability assessment. After all the procedures of a single test are completed, each drive motor runs in reverse, the lifting mechanism moves upward to reset, the reset spring 37 rebounds and drives the cross plate 319 and each level of transmission components back to the initial position, the equipment as a whole returns to standby state, and can continuously carry out multi-point in-situ testing operations. The equipment has a high degree of automation and strong testing stability, effectively reducing errors caused by manual intervention and improving the accuracy of in-situ mechanical parameter acquisition of dam construction materials and the efficiency of on-site operations.

[0024] Example 5, a reliability analysis method for asphalt concrete core wall dams based on the correlation characteristics of dam material parameters, requires parameter acquisition first, simultaneously obtaining four types of parameters: Parameter 1: Based on the soil shear strength testing equipment of this invention, in-situ mechanical parameters can be accurately collected. The sensor then converts the pressure signal into quantitative data of soil shear strength and transmits it to the evaluation module in real time. This soil shear strength testing equipment of this invention serves as a carrier for detecting in-situ mechanical parameters of soil in the pre-selected area of ​​the dam foundation, and the measured shear force data can also be directly used to deduce the soil compaction degree. Parameter 2: Based on the material physical parameter detection module, any type of concrete nucleus-free density testing equipment, such as the ZBL-W310 handheld nucleus-free density meter, can be used to measure concrete density data, including particle size distribution in the physical properties section of dam building materials. Parameter 3: Based on the dam body geometry and geological parameter detection module, the iRTK5 handheld GNSS RTK measuring instrument can be used to measure the dam body dimensions and geological strata related data, including the filling layers covered by the dam body structural plates, dam axis, core wall thickness and zoning data; Parameter 4: Based on the asphalt concrete core wall special parameter testing module, the AMPT asphalt mixture performance tester can be used to measure the relevant data of core wall mechanics and asphalt impermeability, including the permeability coefficient, porosity, moisture content, and temperature field correlation data of the core wall impermeability performance plate.

[0025] The above four types of parameters provide a basis for subsequent statistical analysis of dam material mechanical parameters, high-dimensional parameter dependency modeling, static response of dam body during water impoundment, and calculation of dam reliability indicators.

[0026] The soil shear strength testing equipment of this invention collects parameters related to soil in-situ shear strength, concrete density data, dam dimensions and geological strata, and core wall mechanics and asphalt seepage prevention performance data as the basis for this evaluation module.

[0027] By combining the above four modules to simultaneously collect full-dimensional data on the asphalt concrete core wall dam, a three-dimensional structural model of the asphalt concrete core wall dam is constructed using Abaqus software, as shown in the schematic diagram. Figure 15 As shown, the data on the depth of the overburden layer, groundwater level, and distribution of internal defects of the geological slabs in the pre-selected area of ​​the dam foundation, published by the Geological Bureau, are then provided to the intelligent reliability analysis module.

[0028] The intelligent reliability analysis module specifically includes: Random parameter modeling and sampling module: To obtain random parameters that are closer to actual engineering practice and accurately reflect the true variability of materials, secondary development was performed using Python. Databases from various authoritative academic websites were crawled to retrieve actual engineering data, obtaining real-world parameters of Duncan-Zhang EB dam materials for multiple real-world asphalt concrete core wall dam projects. These parameters were then used to train a Copula algorithm, and various marginal probability distribution functions with different characteristics were selected to fit the optimal function to which the parameters conform. The optimal marginal probability distribution function for the Duncan-Zhang EB parameters was found, and the correlation between the core parameters of the Duncan-Zhang EB algorithm was identified, facilitating the subsequent automatic simulation and generation of different sets of core parameter values.

[0029] Deep learning agent computation module: Using the trained R-copula function, a large number of univariate samples of K in the Duncan-Chang EB parameters of the dam construction material were performed using the GF biased point selection method to generate the corresponding conditional sample values ​​of each Duncan-Chang EB parameter, such as... Figure 16 As shown, the distribution characteristics of the generated random sample points are basically consistent with those of the original dam material samples, and the probability density function and shape parameters of the original dam material sample parameters and the conditional sample parameters are not significantly different.

[0030] Reliability Analysis Module: The full-dimensional data measured on-site is input into Abaqus for modeling. The Duncan-Zhang EB sample condition parameters calculated by the Copula function are integrated. Based on the soil shear strength measured by the soil shear strength testing equipment according to the present invention and the relevant parameters that can be directly derived, the closest Duncan-Zhang EB condition sample parameters are selected and configured. The continuous prediction results of the settlement of the current core wall dam are then obtained, and the reliability analysis of the current core wall dam is completed.

[0031] Secondly, this invention provides a reliability analysis method for asphalt concrete core wall dams based on the correlation characteristics of dam material parameters. The method is as follows: S1: On-site dam body parameter acquisition, simultaneously obtaining four types of parameters: in-situ soil shear strength data obtained through the soil shear strength testing equipment of this invention; concrete density data measured by the ZBL-W310 handheld coreless density meter, including particle size distribution in the physical properties section of the dam material; dam body dimensions and geological strata related data measured by the iRTK5 handheld GNSS RTK measuring instrument, including data on filling layers, dam axis, core wall thickness and zoning covered by the dam body structure section; and asphalt mixture performance testing instrument measured data related to core wall mechanics and asphalt seepage prevention performance, including permeability coefficient, porosity, moisture content, and temperature field related data in the core wall seepage prevention performance section. S2: Random parameter modeling and sampling. Based on a large number of actual parameters of Duncan-Zhang EB dam materials collected from actual asphalt concrete core wall dam projects, the parameters are input into the R-Teng Copula model for training. The optimal marginal probability distribution function of the Duncan-Zhang EB parameters is found by fitting and the correlation between the core parameters of Duncan-Zhang EB is found, which facilitates the subsequent automatic simulation to generate the values ​​of the core parameters under various working conditions. S3: Deep learning proxy computation, using the trained R-Teng Copula function to simulate and generate the values ​​of the Duncan-Zhang EB corresponding parameters of the corresponding conditional samples under different working conditions; S4: Intelligent Reliability Analysis. This involves inputting full-dimensional data from actual field measurements into Abaqus for modeling. It integrates sample condition parameters calculated using the R-Teng Copula function under various Duncan-Zhang EB conditions. Based on the soil shear strength measured by the soil shear strength testing equipment and directly derived parameters, it selects and configures a set of Duncan-Zhang EB condition sample parameters that best approximate the actual working condition. This process generates a continuous prediction result for the current core wall dam's settlement, thus completing the reliability analysis of the current core wall dam.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A platform for reliability analysis of asphalt concrete core dam based on dam material parameter correlation characteristics, comprising a dam material parameter acquisition and preprocessing module and an intelligent reliability evaluation module, characterized in that, The dam material multi-source parameter acquisition and preprocessing module includes an in-situ mechanical parameter detection module, a material physical parameter detection module, a dam body geometric and geological parameter detection module, and an asphalt concrete core wall special parameter detection module. The intelligent reliability assessment module includes a random parameter modeling and sampling module, a deep learning agent computation module, and a reliability analysis module.

2. The concrete core dam reliability analysis platform based on dam material parameter correlation characteristics according to claim 1, characterized in that, The in-situ mechanical parameter detection module includes a soil shear strength testing device. The soil shear strength testing device includes a base (1). A first lifting chamber (13) is fixedly connected to the inner side of the base (1). A control panel (12) is fixedly connected to the right surface of the first lifting chamber (13). A first lifting motor (15) is fixedly connected inside the first lifting chamber (13). A first lead screw (16) is fixedly connected to the output end of the first lifting motor (15). The end of the first lead screw (16) away from the first lifting motor (15) is rotatably connected to the inner bottom surface of the first lifting chamber (13). A transmission block is threaded onto the surface of the first lead screw (16). (19) The transmission block (19) is fixedly connected to the side away from the first lead screw (16) with a second lifting chamber (14). The second lifting chamber (14) is fixedly connected to the interior of a second lifting motor (17). The output end of the second lifting motor (17) is fixedly connected to a second lead screw (18). The end of the second lead screw (18) away from the second lifting motor (17) is rotatably connected to the inner bottom surface of the second lifting chamber (14). The surface of the second lead screw (18) is threaded with a fixing plate (2). The fixing plate (2) slides in the second lifting chamber (14). The fixing plate (2) is fixedly connected to the interior of a through-hole rotating motor (21).

3. The concrete core dam reliability analysis platform based on dam material parameter correlation characteristics according to claim 2, characterized in that, The output end of the rotating motor (21) is fixedly connected to a first transmission rod (22), the bottom surface of the first transmission rod (22) is fixedly connected to a bearing (26), the lower surface of the fixed plate (2) is fixedly connected to an electric push rod (23), the output end of the electric push rod (23) is fixedly connected to a fixed frame (24), the inner wall of the fixed frame (24) is fixedly connected to a limit ring (25), the inner surface of the limit ring (25) is rotatably connected to a rotating disk (32), and the first transmission rod (22) slides through the rotating disk (32).

4. The concrete core dam reliability analysis platform based on dam material parameter correlation characteristics according to claim 3, characterized in that, A rotating cylinder (3) is fixedly connected to the lower surface of the rotating disk (32). A spiral drill bit (31) is fixedly connected to the lower surface of the rotating cylinder (3). A partition (321) is fixedly connected inside the rotating cylinder (3). A crown gear (311) is rotatably connected to the upper surface of the partition (321). A measuring motor (39) is fixedly connected to the upper surface of the partition (321). A gear (310) is fixedly connected to the output end of the measuring motor (39). The gear (310) meshes with the crown gear (311). A rotating shaft (33) is rotatably connected to the inner surface of the bearing (26). A second transmission rod (34) is fixedly connected to the lower surface of the rotating shaft (33). The second transmission rod (34) slides through the crown gear (311) and completely penetrates the partition (321).

5. The reliability analysis platform for concrete core wall dams based on the correlation characteristics of dam material parameters according to claim 4, characterized in that, The lower surface of the partition (321) is rotatably connected to a first rotating ring (312), and the second transmission rod (34) slides through the first rotating ring (312). The lower surface of the first rotating ring (312) is fixedly connected to an upper measuring arm (313), and the lower surface of the second transmission rod (34) abuts against a fifth transmission rod (314).

6. The concrete core dam reliability analysis platform based on dam material parameter correlation characteristics according to claim 5, characterized in that, The inner bottom surface of the rotating cylinder (3) is rotatably connected to a second rotating ring (317), and the fifth transmission rod (314) slides through the second rotating ring (317). The upper surface of the second rotating ring (317) is fixedly connected to a lower measuring arm (315), and the end of the lower measuring arm (315) away from the fifth transmission rod (314) is fixedly connected to a pressure sensor (316). The pressure sensor (316) and the lower end of the upper measuring arm (313) are on the same height plane.

7. The concrete core dam reliability analysis platform based on dam material parameter correlation characteristics according to claim 5, characterized in that, A fixing ring (38) is fixedly connected to the lower surface of the fifth transmission rod (314). The lower surface of the fixing ring (38) is elastically connected to the inner wall of the spiral drill bit (31) through a return spring (37). A third transmission rod (35) is fixedly connected to the lower surface of the fixing ring (38).

8. The concrete core dam reliability analysis platform based on dam material parameter correlation characteristics according to claim 7, characterized in that, The lower surface of the third transmission rod (35) is fixedly connected to the fourth transmission rod (36), and the lower surface of the fourth transmission rod (36) is fixedly connected to the cross plate (319). The lower surface of the helical drill bit (31) is rotatably connected to a rotating column (318) that passes through it. The upper surface of the rotating column (318) is provided with a through cross groove (320). The cross groove (320) is slidably connected to the cross plate (319). The pressure sensor (316), measuring motor (39), rotating motor (21), second lifting motor (17), and first lifting motor (15) are all electrically connected to the control panel (12). 9.The concrete core dam reliability analysis platform based on dam material parameter correlation characteristics according to claim 1, characterized in that, The material physical parameter testing module includes any type of concrete non-core density testing equipment; the dam body geometric and geological parameter testing module includes any type of GNSS three-dimensional geometric measuring instrument; and the asphalt concrete core wall specific parameter testing module includes any type of asphalt mixture performance testing instrument.

10. A method for reliability analysis of asphalt concrete core dam based on dam material parameter correlation characteristics, characterized in that, The reliability analysis platform for asphalt concrete core wall dams based on the correlation characteristics of dam material parameters, as described in any one of claims 1 to 5, comprises the following steps: S1: On-site dam body parameter acquisition, simultaneously obtaining four types of parameters: in-situ soil shear strength data obtained by the soil shear strength testing equipment; physical parameters of dam material density and moisture content transmitted by the material physical monitoring equipment; dam body structural dimensions and dam foundation geological parameters transmitted by the dam body geometric geological monitoring equipment; and core wall mechanical and seepage prevention performance parameters transmitted by the asphalt concrete core wall special monitoring equipment. S2: Random parameter modeling and sampling. The collected Duncan-Zhang EB dam material parameters of the real-world asphalt concrete core wall dam project are input into the R-Teng Copula model for training. The optimal marginal probability distribution function of the Duncan-Zhang EB parameters is found, that is, the correlation between the core parameters of Duncan-Zhang EB is found, which facilitates the subsequent automatic simulation to generate the values ​​of the core parameters under different working conditions. S3: Deep learning agent computation, using the trained R-Teng Copula function to generate the values ​​of the Duncan-Zhang EB corresponding parameters of the conditional samples under different working conditions; S4: Intelligent Reliability Analysis. This method utilizes on-site measured data from all dimensions to construct an Abaqus core wall dam model. It integrates sample condition parameters calculated using the R-Teng Copula function under various Duncan-Zhang EB conditions. Based on the soil shear strength measured by the soil shear strength testing equipment and the relevant parameters that can be directly derived, it selects and configures a set of Duncan-Zhang EB condition sample parameters that are closest to the actual working conditions. The method then runs to predict the continuity of dam settlement for the current core wall dam, thereby completing the reliability analysis of the current core wall dam.

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