An underwater pile foundation stability monitoring system

Abstract

The application discloses a kind of underwater pile foundation stability monitoring systems, the system includes: foundation anchoring detection module, for detecting the electrical change signal of ground mass;Pile foundation connection detection module, for detecting the electric field change signal around pile foundation;Data acquisition and communication module, for collecting and processing ground mass electrical change signal to obtain foundation deterioration analysis data, collecting and processing electric field change signal around pile foundation to obtain pile foundation deformation analysis data;And for storing and uploading foundation deterioration analysis data and pile foundation deformation analysis data to cloud;And, cloud, for remote monitoring of foundation deterioration analysis data and pile foundation deformation analysis data.The application detects the reaction foundation deterioration condition by foundation anchoring detection module, monitors the reaction pile foundation deformation condition by pile foundation connection detection module, realizes the multi-scale information fusion between foundation and pile foundation, is not easily affected by water disturbance and biological attachment, and uploads data to cloud, can long-term stable monitoring.

Description

Technical Field

[0001] This invention relates to the field of marine engineering testing technology, and in particular to an underwater pile foundation stability monitoring system. Background Technology

[0002] With the rapid development of the offshore wind power industry, wind turbine foundations, as crucial basic structures supporting the towers and rotors, directly impact the long-term stability and operational safety and service life of the entire wind turbine unit. Offshore foundations are constantly exposed to high salinity, high humidity, and strong hydrodynamic environments, leading to complex processes in the foundation soil such as consolidation relaxation, changes in pore water pressure, and microscopic electrochemical corrosion. This results in a deterioration of the stress environment of the foundation structure and potential instability risks.

[0003] Existing methods for monitoring the stability of pile foundations mainly rely on technologies such as fiber optic sensing, acoustic detection, and strain gauge measurement. Although these methods can reflect the stress state or deformation of the pile to a certain extent, they generally have the following shortcomings: (1) Fiber optic and acoustic signals are easily affected by water disturbance and biological attachment, resulting in poor long-term monitoring stability; (2) It is difficult to achieve multi-scale information fusion between the foundation and the pile foundation; (3) They have high energy consumption, complex layout, and lack the ability to sense the electrochemical degradation process in situ. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address at least one defect of the related technologies mentioned in the background: the related pile foundation stability monitoring methods are easily affected by water disturbance and biological attachment, resulting in poor long-term monitoring stability; and it is difficult to achieve multi-scale information fusion between the foundation and the pile foundation. The present invention provides an underwater pile foundation stability monitoring system.

[0005] The technical solution adopted by this invention to solve its technical problem is: to construct an underwater pile foundation stability monitoring system, the system comprising: The foundation anchorage detection module is installed in the foundation at the bottom of the pile foundation and in the surrounding area to detect electrical change signals in the foundation soil. The pile foundation connection detection module is located in the lower part of the pile foundation and is used to detect the change signal of the electric field around the pile foundation. The data acquisition and communication module is used to acquire and process electrical change signals of the foundation soil to obtain foundation deterioration analysis data, and to acquire and process electric field change signals around the pile foundation to obtain pile foundation deformation analysis data; it is also used to store the foundation deterioration analysis data and pile foundation deformation analysis data and upload them to the cloud; and... The cloud platform is used for remote monitoring of foundation deterioration analysis data and pile foundation deformation analysis data.

[0006] In some embodiments, the pile foundation includes a pile body, and the foundation anchorage detection module is fixedly connected to the pile body using a connection and fixing structure, and is located in the foundation at the bottom of the pile body and in the surrounding area.

[0007] In some embodiments, the outer surface of the foundation anchorage detection module is provided with a ring-shaped foundation electrode array, which includes several sets of alternately arranged reference electrodes and working electrodes.

[0008] In some embodiments, the reference electrode is an Ag / AgCl electrode, and the working electrode is a titanium-graphene electrode.

[0009] In some embodiments, the reference electrode and the working electrode are symmetrically distributed in the circumferential direction of the pile foundation at a first preset interval; and several annular ground electrode arrays are arranged at a second preset interval in the vertical arrangement depth of the pile foundation.

[0010] In some embodiments, the electrical change signal of the foundation soil includes at least one of the following: spontaneous potential change signal, resistivity change signal, and redox potential change signal.

[0011] The electrical change signals of the foundation soil are collected and processed to obtain foundation deterioration analysis data, including: The ground seepage state is obtained by analyzing the natural potential change signal; The soil softening state was determined by analyzing the resistivity change signal. The state of soil corrosion is determined by analyzing the changes in redox potential.

[0012] In some embodiments, the pile foundation includes a pile body and a pile wall, with the pile wall disposed on the outside of the pile body. The pile foundation connection detection module includes an electrical pressure plate and a support connection mechanism. The electrical pressure plate is fixed on the outside of the pile wall and symmetrically arranged on the opposite side of the pile body. The support connection mechanism is used to support and connect the pile wall.

[0013] In some embodiments, the change signal of the electric field around the pile foundation is the change in the intensity of the electric field signal generated by the electric pressure plate through DC excitation to form a stable electric field.

[0014] Collecting and processing electric field variation signals around the pile foundation yields pile foundation deformation analysis data, including: The displacement change between the electric pressure plates is inverted by the change in the electric field signal intensity of the stable electric field formed by the electric pressure plates through DC excitation, and the deformation amplitude and direction of the pile foundation are obtained by analysis.

[0015] In some embodiments, the data acquisition and communication module includes multiple signal acquisition channels, a data processing and storage module, and a cloud transmission interface. The multiple signal acquisition channels are used to acquire electrical change signals of the foundation soil and electric field change signals around the pile foundation, which are then input to the data processing and storage module. The data processing and storage module receives and processes the electrical change signals of the foundation soil to obtain foundation deterioration analysis data, receives and processes the electric field change signals around the pile foundation to obtain pile foundation deformation analysis data, and stores the foundation deterioration analysis data and pile foundation deformation analysis data. The cloud transmission interface is used to upload the foundation deterioration analysis data and pile foundation deformation analysis data to the cloud.

[0016] In some embodiments, the cloud is also used to establish an electrochemical behavior model of the foundation and pile foundation based on the monitoring curves of the foundation deterioration analysis data and the pile foundation deformation analysis data, and send the results to the smart terminal.

[0017] By implementing this invention, the following beneficial effects are achieved: This invention utilizes a foundation anchoring detection module to detect electrical changes in the foundation soil, reflecting foundation deterioration, and a pile foundation connection detection module to detect changes in the electric field around the piles, reflecting pile deformation. This achieves multi-scale information fusion between the foundation and the piles. Compared to traditional pile foundation stability monitoring methods, this invention is less susceptible to water disturbance and biological attachment. Furthermore, it uploads data to the cloud for real-time sharing, providing decision-making support for maintenance personnel and enabling long-term stable monitoring. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This diagram shows an overall structural schematic of an embodiment of the underwater pile foundation stability monitoring system of the present invention; Figure 2 The diagram shows the arrangement of the annular foundation electrode array in the foundation anchoring module of an embodiment of the underwater pile foundation stability monitoring system of the present invention. Detailed Implementation

[0019] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] It should be noted that the flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0021] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0022] It should be noted that "at least two" refers to at least two, which can be two, three, or any number. "At least one" can be one, two, or any number.

[0023] like Figure 1 As shown, some embodiments of the present invention disclose an underwater pile foundation stability monitoring system, the system comprising: Foundation anchorage detection module 1 is installed in the foundation at the bottom of the pile foundation and in the surrounding area to detect electrical change signals of the foundation soil. Pile foundation connection detection module 2 is set in the lower part of the pile foundation and is used to detect the change signal of electric field around the pile foundation. Data acquisition and communication module 3 is used to acquire and process electrical change signals of the foundation soil to obtain foundation deterioration analysis data, and to acquire and process electric field change signals around the pile foundation to obtain pile foundation deformation analysis data; and to upload the foundation deterioration analysis data and pile foundation deformation analysis data to the cloud; and, The cloud platform is used for remote monitoring of foundation deterioration analysis data and pile foundation deformation analysis data.

[0024] This invention utilizes a foundation anchoring detection module to detect electrical changes in the foundation soil, reflecting foundation deterioration, and a pile foundation connection detection module to detect changes in the electric field around the piles, reflecting pile deformation. This achieves multi-scale information fusion between the foundation and the piles. Compared to traditional pile foundation stability monitoring methods, this invention is less susceptible to water disturbance and biological attachment. Furthermore, it uploads data to the cloud for real-time sharing, providing decision-making support for maintenance personnel and enabling long-term stable monitoring.

[0025] In some embodiments, the pile foundation includes a pile body 4, and the foundation anchorage detection module 1 is fixedly connected to the pile body 4 using a connection and fixing structure, and is set in the foundation at the bottom of the pile body 4 and in the surrounding area.

[0026] Specifically, the connecting and fixing structure includes at least one of a steel cable structure, an anchor foot structure, or a flange structure. The foundation anchoring detection module 1 is fixed to the pile body 4 via at least one of the steel cable structure, anchor foot structure, or flange structure, and is disposed in the foundation at the bottom of the pile body 4 and in the surrounding area, so that it is in full contact with and embedded in the foundation soil. It should be noted that the above-mentioned steel cable structure, anchor foot structure, and flange structure are only examples and are not intended to limit this application; other structures may also be used.

[0027] In some embodiments, the outer surface of the foundation anchorage detection module 1 is provided with a ring-shaped foundation electrode array, which includes several sets of alternately arranged reference electrodes 11 and working electrodes 12. For example, both the reference electrodes 11 and the working electrodes 12 are probes.

[0028] The reference electrode 11 is an Ag / AgCl electrode, and the working electrode 12 is a titanium-graphene electrode. The Ag / AgCl electrode provides a stable reference potential and is unaffected by external electromagnetic interference. The titanium-graphene electrode has high conductivity, resistance to salt corrosion and biofouling, and can operate stably in high-salinity and high-humidity deep-sea environments for extended periods.

[0029] like Figure 2 As shown, in some embodiments, the reference electrode 11 and the working electrode 12 are symmetrically distributed in the circumferential direction of the pile foundation at a first preset spacing. Circumferential symmetrical distribution means that the electrodes are arranged around the central axis or dot of the annular foundation electrode array according to a specific rule (such as the first preset spacing) in the circumferential direction, so that the overall structure still coincides with the original distribution after rotating around the axis by a certain angle.

[0030] Several annular ground electrode arrays are set at a second preset interval at the vertical depth of the pile foundation (specifically, pile body 4).

[0031] Specifically, the first preset distance between the reference electrode 11 and the working electrode 12 is generally 20-30 cm, and the vertical spacing can be adjusted to within 0.5-2 m according to geological conditions. The second preset distance can be set to 0.1-2 m. For example, when the vertical spacing can be adjusted to 0.5 m according to geological conditions, the second preset distance can be set to 0.1 m. A ring-shaped ground electrode array is set for every 0.1 m change in the vertical spacing of the pile foundation (specifically, the pile body 4), which can perform in-situ monitoring of the ground electric field characteristics within different depth ranges. It should be noted that the specific figures in the above-mentioned first preset distance, second preset distance, and vertical spacing are only examples and are not intended to limit this application; other values ​​are also possible.

[0032] In some embodiments, the electrical change signal of the foundation soil includes at least one of the following: spontaneous potential change signal, resistivity change signal, or redox potential change signal.

[0033] Accordingly, electrical change signals of the foundation soil are collected and processed to obtain foundation deterioration analysis data, including: The ground seepage state is obtained by analyzing the natural potential change signal; The soil softening state was determined by analyzing the resistivity change signal. The state of soil corrosion is determined by analyzing the changes in redox potential.

[0034] Specifically, the ring-shaped foundation electrode array structure enables real-time monitoring of changes in the spontaneous potential, resistivity, and redox potential of the foundation soil. When seepage, consolidation, ion migration, or changes in the corrosive environment occur in the foundation, the amplitude and distribution characteristics of the electric field signal change accordingly. Through long-term continuous monitoring of the electrical signals, the system can quantitatively reflect the evolution of the electrochemical state of the pore water in the foundation soil, identify deterioration trends, the development of weak layers, and changes in stability, thereby achieving an electrical assessment of the foundation's health status.

[0035] In some embodiments, the pile foundation includes a pile body 4 and a pile wall 5, with the pile wall 5 disposed on the outside of the pile body 4. The pile foundation connection detection module 2 includes an electrical pressure plate 21 and a support connection mechanism 22, wherein the electrical pressure plate 21 is fixed to the outside of the pile wall 5 and symmetrically arranged on opposite sides of the pile body 4. The support connection mechanism 22 is used to support and connect the pile wall 5.

[0036] Specifically, the electrical pressure plate 21 is made of high-strength composite conductive material, covered with an anti-corrosion coating, and fixed to the outside of the pile wall 5 by a flange or ring structure. Two electrical pressure plates are symmetrically arranged on opposite sides of the pile body 4.

[0037] In some embodiments, the change signal of the electric field around the pile foundation is the change in the intensity of the electric field signal generated by the electric pressure plate 21 through DC excitation to form a stable electric field; Accordingly, the electric field change signals around the pile foundation are collected and processed to obtain pile foundation deformation analysis data, including: The displacement change between the electric pressure plates 21 is inverted based on the change in the electric field signal intensity of the stable electric field formed by the electric pressure plate 21 through DC electric excitation, and the deformation amplitude and direction of the pile foundation are obtained by analysis.

[0038] Specifically, the electrical pressure gauges 21 generate a stable electric field through DC excitation. When the pile 4 undergoes axial or radial deformation due to external loads, hydrodynamic forces, or foundation settlement, the distance between the electrical pressure gauges 21 and the electric field distribution will change measurably. The system collects the changes in electric field signal intensity in real time, and the displacement change between the two gauges can be inverted based on the calibration curve, thereby quantitatively reflecting the deformation amplitude and direction of the pile foundation and realizing the electrical identification of the stress state of the pile 4. Compared with traditional strain gauges or fiber optic sensors, this electrical pressure gauge 21 has the advantages of simple structure, strong corrosion resistance, convenient installation, and stable signal. It can operate for a long time in the complex seabed environment to realize in-situ electrical monitoring of the stress and deformation state of the pile foundation.

[0039] In some embodiments, the data acquisition and communication module 3 includes multiple signal acquisition channels, a data processing and storage unit, and a cloud transmission interface. The multiple signal acquisition channels are used to acquire electrical change signals of the foundation soil and electric field change signals around the pile foundation, which are then input to the data processing and storage module. The data processing and storage unit receives and processes the electrical change signals of the foundation soil to obtain foundation deterioration analysis data, receives and processes the electric field change signals around the pile foundation to obtain pile foundation deformation analysis data, and stores the foundation deterioration analysis data and pile foundation deformation analysis data. The cloud transmission interface is used to upload the foundation deterioration analysis data and pile foundation deformation analysis data to the cloud.

[0040] Specifically, the data acquisition and communication module 3 is connected to the ring-shaped foundation electrode array and the electrical pressure plate 21 via a waterproof cable. The internal sensors of the data acquisition and communication module 3 collect electrical change signals of the foundation soil and electric field change signals around the pile foundation, forming a multi-channel electrical signal acquisition network.

[0041] In some embodiments, the data processing and storage unit includes a signal conditioning circuit, a filtering and amplification circuit, an analog-to-digital converter (ADC) circuit, and a signal synchronization control circuit. The signal conditioning circuit converts the distorted, non-standard raw signal output from the sensor into a standard form suitable for subsequent circuit processing. The filtering and amplification circuit filters out interference frequencies and amplifies the signal to a identifiable range. The ADC circuit converts the acquired analog signal into a digital signal. The signal synchronization control circuit ensures that the acquisition and processing of multi-channel signals are time-consistent, avoiding signal misalignment or analysis errors caused by timing deviations.

[0042] The above circuitry enables high-resolution acquisition of microvolt-level potential signals. The system sampling frequency can be set between 1 and 10 Hz depending on the monitoring target, satisfying both long-term stable monitoring requirements and the ability to capture short-term dynamic changes.

[0043] In some embodiments, electrical change signals of the foundation soil are collected and processed to obtain foundation deterioration analysis data, including: After real-time noise filtering of electrical change signals of the foundation soil, a deep learning model is introduced for feature extraction and trend analysis to obtain foundation deterioration analysis data.

[0044] Collecting and processing electric field variation signals around the pile foundation yields pile foundation deformation analysis data, including: After real-time noise filtering of the electric field change signal around the pile foundation, a deep learning model is introduced for feature extraction and trend analysis to obtain pile foundation deformation analysis data.

[0045] In some embodiments, the data processing and storage unit further includes a storage chip for storing foundation deterioration analysis data and pile foundation deformation analysis data.

[0046] Using 5G communication, the foundation deterioration analysis data and pile foundation deformation analysis data stored in the memory chip are uploaded to the cloud via a waterproof antenna.

[0047] In some embodiments, the cloud platform is also used to perform at least one of the following on foundation deterioration analysis data and pile foundation deformation analysis data: state identification, life prediction analysis, visualization, and multi-site linkage analysis. Life prediction analysis refers to mapping and predicting the pile foundation life based on a comprehensive comparison and analysis of the degree of foundation deterioration and pile foundation deformation with historical data. Multi-site linkage analysis refers to the core function of the cloud platform to collaboratively process data from multiple monitoring stations to identify risk areas.

[0048] In some embodiments, the cloud is also used to establish an electrochemical behavior model of the foundation and pile foundation based on the monitoring curves of the foundation deterioration analysis data and pile foundation deformation analysis data, so as to realize the long-term trend fitting and early warning of the foundation and pile foundation, and send the results to the smart terminal.

[0049] Specifically, when abnormal changes occur in the electrical signal (such as a sharp increase in resistivity, a sudden drop in redox potential, or a significant increase in potential difference), the system automatically generates an alarm signal and pushes it to the monitoring terminal or mobile application to achieve remote intelligent monitoring.

[0050] In some embodiments, the underwater pile foundation stability monitoring system further includes an energy supply module 6, which is used for energy storage and supply to the foundation anchorage detection module 1, the pile connection detection module 2, and the data acquisition and communication module 3.

[0051] The energy supply module 6 includes a wave energy storage battery pack 61 and an energy management circuit 62. The wave energy storage battery pack 61 is used to convert the mechanical energy of waves into electrical energy for storage through an energy conversion device.

[0052] The energy management circuit 62 is used to convert electrical energy into an output voltage that has been regulated and distributed to power the foundation anchorage detection module 1, the pile connection detection module 2, and the data acquisition and communication module 3.

[0053] In some embodiments, the wave energy storage battery pack 61 includes an energy conversion device and an energy storage device. The energy conversion device is used to convert the mechanical energy of the waves into electrical energy, such as a piezoelectric transducer or an electromagnetic induction device. The energy storage device is used to store the electrical energy converted from the mechanical energy of the waves, such as a lithium battery or a supercapacitor.

[0054] In some embodiments, the energy management circuit 62 is also used to dynamically adjust the output current to ensure that the system continues to operate at night or in calm sea conditions.

[0055] Specifically, the wave energy storage battery pack 61 utilizes the periodic motion of ocean waves to drive a piezoelectric transducer or electromagnetic induction device, converting the mechanical energy of the waves into electrical energy stored in a high-performance lithium battery or supercapacitor. The energy management circuit 62 regulates the output voltage and distributes power, providing continuous power to the data acquisition and communication module 3, enabling self-powered operation. Simultaneously, to prevent damage from salt spray and humidity in the marine environment, the energy supply module 6 is externally coated with a high-polymer pressure-resistant and corrosion-resistant material, and internally employs a multi-level sealing structure to improve its durability and protection level (up to IP68), ensuring long-term reliable operation of the energy supply module 6 in high-humidity and high-pressure environments. This energy supply module 6 has advantages such as being environmentally friendly, requiring minimal maintenance, and being energy self-sufficient, enabling unattended monitoring and full life-cycle operation.

[0056] By implementing this invention, the following beneficial effects are achieved: 1. Achieve electrochemical state monitoring and structural health diagnosis throughout the entire life cycle of pile foundations. By deploying solid Ag / AgCl reference electrodes and titanium-graphene working ring-shaped ground electrode arrays around the pile foundation and the ground, it is possible to monitor electrical parameters such as the natural potential, resistivity, and redox potential of the foundation soil in real time, reflecting the changes in the foundation's seepage state, softening state, and corrosion state. Combined with the electrical pressure plate structure of the pile foundation connection unit, the axial and radial deformation of the pile foundation during operation can be captured simultaneously, realizing full-process monitoring of the pile foundation from installation to operation.

[0057] 2. A three-dimensional electric field sensing system was constructed to achieve coordinated monitoring of the pile foundation's circumferential and vertical directions. The annular ground electrode array within the foundation anchoring unit is symmetrically arranged circumferentially along the pile foundation and vertically covers different depths, forming a three-dimensional spatially distributed sensing network capable of precisely reflecting the evolution characteristics of the foundation's electrochemical field at different depths and orientations. Through spatial inversion of the electric field signal, the deterioration distribution, localized corrosion, and stress concentration areas of the foundation surrounding the pile can be identified. Combined with the high-frequency sampling and signal synchronization mechanism of the data acquisition and communication modules, the spatiotemporal coupling response characteristics of the foundation and pile can be obtained, providing high-resolution data support for foundation stability and structural safety.

[0058] 3. The device possesses high stability and intelligent operation characteristics, making it suitable for complex marine environments. Utilizing a solid-state electrode material system (Ag / AgCl and titanium-graphene), it exhibits excellent salt corrosion resistance and long-term stability, making it suitable for continuous monitoring in high-salt, high-pressure, and high-humidity marine environments. The data acquisition and communication module features a cloud transmission interface, enabling remote real-time monitoring, intelligent data processing, and lifespan prediction via 5G communication, providing decision-making support for maintenance personnel. The energy supply module employs wave energy storage battery packs and energy management circuits, achieving system energy self-sufficiency and ensuring long-term stable operation under unattended conditions. This device is green and energy-efficient, with low maintenance costs, and has promising engineering application prospects. It can be widely used for health monitoring and safety assessment of underwater pile foundations, port foundations, submarine pipelines, and near-shore engineering structures.

[0059] It is understood that the above embodiments only illustrate some implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above embodiments or technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. That is, the embodiments described "in some embodiments" can be freely combined with any of the preceding and following embodiments. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims

1. An underwater pile foundation stability monitoring system, characterized in that, The system includes: Foundation anchorage detection module (1), wherein the foundation anchorage detection module (1) is installed in the foundation at the bottom of the pile foundation and in the surrounding area, and is used to detect electrical change signals of the foundation soil; The pile foundation connection detection module (2) is located in the lower part of the pile foundation and is used to detect the change signal of the electric field around the pile foundation. The data acquisition and communication module (3) is used to acquire and process the electrical change signals of the foundation soil to obtain foundation deterioration analysis data, and to acquire and process the electric field change signals around the pile foundation to obtain pile foundation deformation analysis data; and to store the foundation deterioration analysis data and the pile foundation deformation analysis data and upload them to the cloud; and, The cloud platform is used for remote monitoring of the foundation deterioration analysis data and the pile foundation deformation analysis data.

2. The underwater pile foundation stability monitoring system according to claim 1, characterized in that, The pile foundation includes a pile body (4), and the foundation anchorage detection module (1) is fixedly connected to the pile body using a connection and fixing structure, and is set in the foundation at the bottom of the pile body (4) and its surrounding area.

3. The underwater pile foundation stability monitoring system according to claim 1, characterized in that, The outer surface of the foundation anchorage detection module (1) is provided with a ring-shaped foundation electrode array; The annular ground electrode array includes several sets of alternately arranged reference electrodes (11) and working electrodes (12).

4. The underwater pile foundation stability monitoring system according to claim 3, characterized in that, The reference electrode (11) is an Ag / AgCl electrode, and the working electrode (12) is a titanium-graphene electrode.

5. The underwater pile foundation stability monitoring system according to claim 3, characterized in that, The reference electrode (11) and the working electrode (12) are symmetrically distributed in the circumferential direction of the pile foundation at a first preset spacing; A plurality of the aforementioned annular ground electrode arrays are arranged at a second preset interval at the vertical depth of the pile foundation.

6. The underwater pile foundation stability monitoring system according to claim 1, characterized in that, The electrical change signal of the foundation soil includes at least one of the following: spontaneous potential change signal, resistivity change signal, and redox potential change signal; The process of collecting and processing the electrical change signals of the foundation soil to obtain foundation deterioration analysis data includes: The ground seepage state is obtained by analyzing the natural potential change signal. The soil softening state is obtained by analyzing the resistivity change signal. The state of soil corrosion is determined by analyzing the redox potential change signal.

7. The underwater pile foundation stability monitoring system according to claim 1, characterized in that, The pile foundation includes a pile body (4) and a pile wall (5), the pile wall (5) is located on the outside of the pile body (4), and the pile foundation connection detection module (2) includes an electrical pressure plate (21) and a support connection mechanism (22). The electrical pressure plate (21) is fixed to the outside of the pile wall (5) and symmetrically arranged on the opposite side of the pile body; The support connection mechanism (22) is used to support and connect the pile wall (5).

8. The underwater pile foundation stability monitoring system according to claim 7, characterized in that, The change signal of the electric field around the pile foundation is the change in the electric field signal intensity of the electric pressure plate (21) that forms a stable electric field through DC excitation; The process of collecting and processing the electric field change signal around the pile foundation to obtain pile foundation deformation analysis data includes: The displacement change between the electric pressure plates (21) is inverted based on the change in the electric field signal intensity of the stable electric field formed by the DC electric excitation of the electric pressure plates (21), and the deformation amplitude and direction of the pile foundation are obtained by analysis.

9. The underwater pile foundation stability monitoring system according to claim 1, characterized in that, The data acquisition and communication module (3) includes: Multiple signal acquisition channels, data processing and storage module, and cloud transmission interface; The multi-signal acquisition channel is used to acquire electrical change signals of the foundation soil and electric field change signals around the pile foundation and input them to the data processing and storage module. The data processing and storage unit is used to receive and process the electrical change signals of the foundation soil to obtain foundation deterioration analysis data, receive and process the electric field change signals around the pile foundation to obtain pile foundation deformation analysis data, and store the foundation deterioration analysis data and the pile foundation deformation analysis data. The cloud transmission interface is used to upload the foundation deterioration analysis data and the pile foundation deformation analysis data to the cloud.

10. The underwater pile foundation stability monitoring system according to claim 1, characterized in that, The cloud platform is also used to establish an electrochemical behavior model of the foundation and pile foundation based on the monitoring curves of the foundation deterioration analysis data and the pile foundation deformation analysis data, and to send the results to the smart terminal.

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