Shield muck water content real-time detection system based on multi-frequency dielectric property and calibration method

Abstract

The invention discloses a shield muck water content real-time detection system based on multi-frequency dielectric characteristics and a calibration method. The shield muck water content real-time detection system comprises a muck preprocessing module, a multi-frequency dielectric detection module and a muck water content data display module. The muck pretreatment module is used for crushing and removing impurities from muck and adsorbing and removing metal impurities which can interfere with detection in the muck; the multi-frequency dielectric detection module is used for detecting the water content of the muck by transmitting electromagnetic waves with different frequencies and utilizing the characteristic that dielectric parameters of the muck change along with the water content; the muck water content data display module is mainly used for displaying multi-dimensional data related to the water content of shield muck in real time. According to the method, a calibration corresponding model of the dielectric data of the muck and the water content of the muck is obtained by adopting a muck water content calibration method, the dielectric parameters of the muck are rapidly detected by applying a multi-frequency dielectric fusion detection technology, and the dielectric parameters are transmitted to the calibration corresponding model to obtain the specific water content of the muck, so that the purpose of rapid detection is achieved.

Description

Technical Field

[0001] This invention relates to the field of industrial data technology, specifically to a real-time detection system and calibration method for the moisture content of tunnel boring machine slag based on multi-frequency dielectric properties. Background Technology

[0002] The real-time moisture content monitoring system for tunnel boring machine (TBM) excavated soil is a comprehensive monitoring system built upon sensor technology, data acquisition and transmission technology, and intelligent analysis algorithms. It collects excavated soil samples in real time during TBM construction, uses capacitive and microwave sensors to rapidly detect the moisture content, and transmits the data to the monitoring center in real time. After algorithm analysis and processing, the system presents the changes in excavated soil moisture content in a visual interface, enabling dynamic monitoring and early warning of TBM excavated soil moisture content. This provides precise data support for optimizing TBM construction parameters, controlling excavated soil improvement, and subsequent excavated soil treatment, ensuring the safe and efficient progress of TBM construction.

[0003] Existing methods for testing the moisture content of tunnel boring machine (TBM) excavated soil have significant technical limitations:

[0004] While the offline drying method is a standard testing method in the industry and has high accuracy, it has two major drawbacks: First, the testing cycle is lengthy, with each test taking 2 to 4 hours, which is difficult to meet the real-time parameter adjustment needs of tunnel boring machine construction. Second, the testing process relies on manual sampling, laboratory equipment drying, and mass weighing, which results in high labor and equipment energy costs, and the representativeness of the samples is easily affected by the randomness of the sampling location.

[0005] While on-site microwave online detection technology boasts a response time of up to seconds, its engineering applications suffer from environmental adaptability limitations: when the temperature fluctuation of the excavated soil exceeds 10°C, the temperature sensitivity of the moisture dielectric parameter causes the detection value to drift; furthermore, the presence of heterogeneous particles such as iron filings and gravel mixed in the excavated soil can easily lead to abnormal microwave signal reflection or scattering paths, resulting in a significant decrease in detection accuracy. Both methods are limited by their respective timeliness and environmental interference resistance, making it difficult to meet the "real-time, accurate, and reliable" detection requirements for excavated soil moisture content in tunnel boring machine (TBM) construction. Summary of the Invention

[0006] The purpose of this invention is to provide a real-time detection system and calibration method for the moisture content of tunnel boring machine excavated soil based on multi-frequency dielectric properties, so as to solve the problem that the existing detection methods mentioned in the background are limited by the detection timeliness and environmental interference resistance, making it difficult to meet the "real-time, accurate and reliable" detection requirements for the moisture content of tunnel boring machine excavated soil.

[0007] This invention provides the following technical solution: a real-time detection system for the moisture content of tunnel boring machine excavated soil based on multi-frequency dielectric properties, including an excavated soil pretreatment module, a multi-frequency dielectric detection module, and an excavated soil moisture content data display module;

[0008] The slag pretreatment module crushes and removes impurities from the slag, adsorbing and removing internal metal impurities that might interfere with detection.

[0009] The multi-frequency dielectric detection module detects the moisture content of slag by emitting electromagnetic waves of different frequencies and utilizing the characteristic that the dielectric parameters of slag change with moisture content.

[0010] The soil moisture content data display module is mainly used to display multi-dimensional data related to the moisture content of tunnel boring machine excavators in real time, so that operators can intuitively monitor the test results and early warning information.

[0011] Preferably, the multi-frequency dielectric detection module includes an electromagnetic wave generator, a dielectric sensing module, a data acquisition and transmission module, and a data analysis module;

[0012] The electromagnetic wave generator transmits signals to the slag through a probe, employing DDS technology with a frequency range of 10kHz-20GHz, a frequency resolution of 1Hz, and adjustable output power of 0-20dBm. It is equipped with a power amplifier with a gain of 30dB to ensure the electromagnetic wave signal strength meets detection requirements. The probe is a coaxial probe made of stainless steel with a silver-plated tip to reduce signal loss. The probe length is customized according to detection needs.

[0013] The dielectric sensing module is used to receive electromagnetic waves and record the time points of electromagnetic wave emission and reception. The dielectric sensing module adopts a high-speed sampling ADC to record the time points of electromagnetic wave emission and reception with a time resolution of 1ns.

[0014] The data acquisition and transmission module receives the time data recorded by the dielectric sensing module and transmits it to the data analysis module.

[0015] The data analysis module calculates the relative dielectric parameters of the slag soil based on parameters such as the propagation speed of electromagnetic waves in a vacuum, the measured time difference, and the probe length. It then converts the dielectric parameters into the moisture content of the slag soil based on the calibration relationship between the dielectric parameters and the moisture content.

[0016] Preferably, the soil moisture content data display module includes a current data display interface, a historical data comparison interface, and a multi-level early warning information display interface;

[0017] The current data display interface shows real-time moisture content data, dielectric parameters, equipment operating status, and current environmental parameters;

[0018] Real-time moisture content data is displayed in large font numbers, and the color changes dynamically according to the moisture content range. Normal data is green, warning data is yellow, and alarm data is red.

[0019] The dielectric parameters are presented in tabular form, including frequency, dielectric parameters, dielectric loss, etc.

[0020] The equipment operating status is displayed using status indicator lights, where green indicates normal operation and red indicates a fault. Clicking on an indicator light will display detailed fault information.

[0021] Current environmental parameters (temperature, humidity) are displayed in the form of a dashboard with an accuracy of ±0.1℃ and ±1%RH.

[0022] The historical data comparison interface displays a trend curve of water content changes. This curve supports overlay comparison of data from multiple monitoring points, and the time range is customizable. The curve employs smoothing filtering to eliminate data fluctuation interference. The historical data comparison interface also provides data statistics functions, calculating the average, maximum, minimum, and standard deviation for a selected time period. It supports data zooming and panning operations for easy viewing of details. Data can be exported to Excel format for offline analysis.

[0023] The multi-level early warning information display interface shows threshold early warning information in a list format, including early warning time, early warning level, current moisture content, and threshold range. Each early warning message is equipped with a confirmation button; after confirmation, the status changes to "processed." Early warning history records can be filtered and queried by time, early warning level, monitoring point, and other criteria.

[0024] Preferably, the slag pretreatment module includes a slag uniform treatment component and a slag foreign object removal component. The slag uniform treatment component and the slag foreign object removal component are matched as a set of slag pretreatment modules. A single system is equipped with two sets of slag pretreatment modules. When one set of slag pretreatment modules pretreatments the slag, the other set of slag pretreatment modules will perform self-cleaning.

[0025] The waste soil homogenization treatment component is used to eliminate local moisture content differences caused by uneven particle size distribution of waste soil.

[0026] The foreign object removal component for construction waste is used to remove metallic foreign objects from construction waste particles, preventing these objects from interfering with the detection accuracy of the multi-frequency dielectric detection module.

[0027] Preferably, the waste soil uniform treatment component includes a feed pipe, a mechanical mixing chamber, and a guide pipe. The output end of the feed pipe is fixedly connected to the input end of the mechanical mixing chamber, and one end of the guide pipe is fixedly connected to the output end of the mechanical mixing chamber.

[0028] Preferably, the slag pretreatment module also includes a self-cleaning device. After a single uniform treatment of slag, the self-cleaning device sequentially introduces clean water and dry gas into the slag uniform treatment component and the slag foreign object removal component to rinse and dry their internal components. While one set of slag pretreatment modules is being cleaned, the slag is transported to the interior of another set of slag pretreatment modules to ensure the continuity of the real-time detection process.

[0029] Preferably, the foreign matter removal assembly for slag includes a vibrating chamber, a discharge pipe, and an electromagnetic separator. The other end of the discharge pipe is fixedly connected to the input end of the vibrating chamber. The vibrating chamber is equipped with a screen and a vibrating motor. The output end of the vibrating chamber is fixedly connected to one end of the discharge pipe. The electromagnetic separator is located on one side of the screen.

[0030] A method for determining the moisture content of construction waste includes the following steps:

[0031] S1. Collect the slag and soil from the tunnel boring machine's discharge port, pre-treat the slag and soil, and then send it to the laboratory for testing using the drying method to obtain specific data on the moisture content of the slag and soil.

[0032] S2. Conduct dielectric experiments on the same batch of slag and soil, use a dielectric spectrometer to obtain full-frequency dielectric data, and match the dielectric data of the same batch of slag and soil moisture content data one by one, and package them into a dataset.

[0033] S3. Based on the dielectric data and moisture content dataset of the slag, a corresponding model is constructed, and a large amount of dataset is fed into the model to train the model.

[0034] Preferably, the excavated soil collected in step S1 needs to be collected multiple times at different locations and time periods of the tunnel boring machine.

[0035] Preferably, the dielectric data in step S2 includes full-frequency dielectric data such as dielectric parameters, dielectric loss, and complex dielectric parameters at different frequencies.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] In this invention, a method for calibrating the moisture content of construction waste is used to obtain dielectric data and a calibration model corresponding to the moisture content of the waste. Multi-frequency dielectric fusion detection technology is employed to rapidly detect the dielectric parameters of the waste. These parameters are then transmitted to the calibration model to obtain the specific moisture content of the waste, thus achieving rapid detection. Compared to traditional drying methods, this significantly improves detection efficiency and shortens detection time. Combined with online information transmission and edge computing, it achieves second-level response for moisture content data, replacing the 2-4 hour delay of laboratory testing and providing immediate data for construction decisions. By monitoring the trend of moisture content changes in real time, it provides early warnings of risks such as screw conveyor blowouts and surface subsidence, significantly reducing the accident rate and minimizing the risk of landslides. Accurate moisture content data reduces the amount of amendments needed, while also reducing equipment wear and maintenance caused by waste issues, achieving full-cycle construction cost control. Attached Figure Description

[0038] Figure 1 This is a system block diagram of the shield tunneling slag moisture content real-time detection system based on multi-frequency dielectric properties of the present invention.

[0039] Figure 2 This is a system block diagram of the soil pretreatment module in the real-time detection system for moisture content of tunnel slag based on multi-frequency dielectric properties of the present invention.

[0040] Figure 3 This is a system block diagram of the multi-frequency dielectric detection module in the real-time detection system for moisture content of tunnel slag based on multi-frequency dielectric properties of the present invention.

[0041] Figure 4 This is a system block diagram of the data display module for the moisture content of tunnel slag in the real-time detection system for moisture content of tunnel slag based on multi-frequency dielectric properties of the present invention.

[0042] Figure 5 This is a schematic diagram showing the connection between the soil uniform treatment component and the soil foreign object removal component in the real-time detection system for shield tunnel slag moisture content based on multi-frequency dielectric properties of the present invention.

[0043] In the picture:

[0044] 1. Slag Pretreatment Module; 11. Slag Uniform Treatment Component; 111. Feed Pipe; 112. Mechanical Mixing Chamber; 113. Guide Pipe; 12. Slag Foreign Object Removal Component; 121. Vibration Chamber; 122. Discharge Pipe; 2. Multi-Frequency Dielectric Detection Module; 21. Electromagnetic Wave Generator; 22. Dielectric Sensing Module; 23. Data Acquisition and Transmission Module; 24. Data Analysis Module; 3. Slag Moisture Content Data Display Module; 31. Current Data Display Interface; 32. Historical Data Comparison Interface; 33. Multi-Level Early Warning Information Display Interface. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Reference Figure 1 As shown: A real-time detection system for the moisture content of tunnel boring machine excavated soil based on multi-frequency dielectric properties, including excavated soil pretreatment module 1, multi-frequency dielectric detection module 2, and excavated soil moisture content display module 3;

[0047] The slag pretreatment module 1 crushes and removes impurities from the slag, adsorbing and removing metal impurities that may interfere with detection.

[0048] Reference Figure 2 As shown: The slag pretreatment module 1 includes a slag uniform treatment component 11 and a slag foreign object removal component 12;

[0049] The slag uniform treatment component 11 is used to eliminate local moisture content differences caused by uneven particle size distribution of slag.

[0050] Reference Figure 5 As shown: The foreign object removal component 12 for slag and soil is used to remove metallic foreign objects from slag and soil particles to prevent them from interfering with the detection accuracy of the multi-frequency dielectric detection module 2. The slag and soil homogenization component 11 includes a feed pipe 111, a mechanical mixing chamber 112, and a guide pipe 113. The output end of the feed pipe 111 is fixedly connected to the input end of the mechanical mixing chamber 112, and one end of the guide pipe 113 is fixedly connected to the output end of the mechanical mixing chamber 112. The foreign object removal component 12 for slag and soil includes a vibrating chamber 121, a discharge pipe 122, and an electromagnetic separator. The other end of the guide pipe 113 is connected to the input end of the vibrating chamber 121. The vibrating chamber 121 is fixedly connected to one end of the discharge pipe 122. The vibrating chamber 121 is equipped with a screen and a vibrating motor. The output end of the vibrating chamber 121 is fixedly connected to one end of the discharge pipe 122. An electromagnetic iron remover is set on one side of the screen. The slag pretreatment module 1 also includes a self-cleaning device. After a single uniform treatment of slag, the self-cleaning device will sequentially introduce clean water and dry gas into the slag uniform treatment component 11 and the slag foreign object removal component 12 to rinse and dry their internal components. When one set of slag pretreatment modules is being cleaned, the slag is transported to the interior of another set of slag pretreatment modules to ensure the continuity of the real-time detection process.

[0051] The feed pipe 111 is made of stainless steel with an inner diameter of 100mm and a wall thickness of 5mm. An electromagnetic vibrating feeder is installed at the feed inlet to ensure uniform and stable conveying of slag and soil.

[0052] The mechanical mixing chamber 112 has a volume of 2m³ and uses a twin-shaft paddle mixer. The paddles are made of wear-resistant alloy material with a tungsten carbide coating. Temperature and level sensors are installed inside the chamber to monitor the mixing status in real time.

[0053] A screw conveyor is installed inside the feed pipe 113 to transport the mixed slag to the slag and foreign matter removal component 12;

[0054] The vibrating chamber 121 measures 2m × 1.5m × 1.2m and is equipped with a double-layer screen. The upper screen has a mesh size of 10mm and the lower screen has a mesh size of 5mm. The vibrating motor has a power of 1.5kW, a vibration frequency of 50Hz, and an amplitude of 2mm to ensure that the slag is fully screened.

[0055] Discharge pipe 122: 200mm in diameter, connected to multi-frequency dielectric detection module 2, with a pneumatic butterfly valve at the discharge port to control the discharge speed;

[0056] The electromagnetic separator is equipped with an automatic iron unloading device.

[0057] The multi-frequency dielectric detection module 2 detects the moisture content of slag by emitting electromagnetic waves of different frequencies and utilizing the characteristic that the dielectric parameters of slag change with moisture content.

[0058] Reference Figure 3 As shown: The multi-frequency dielectric detection module 2 includes an electromagnetic wave generator 21, a dielectric sensing module 22, a data acquisition and transmission module 23, and a data analysis module 24;

[0059] The electromagnetic wave generator 21 transmits signals to the slag through a probe. It employs DDS technology, with a frequency range of 10kHz-20GHz, a frequency resolution of 1Hz, and adjustable output power from 0-20dBm. Equipped with a power amplifier and a gain of 30dB, it ensures the electromagnetic wave signal strength meets detection requirements. The probe is a coaxial probe made of stainless steel, with a silver-plated tip to reduce signal loss. The probe length is customized according to detection needs.

[0060] The dielectric sensing module 22 is used to receive electromagnetic waves and record the time points of electromagnetic wave emission and reception. The dielectric sensing module 22 includes a low-frequency electromagnetic wave sensor, a mid-frequency electromagnetic wave sensor and a high-frequency electromagnetic wave sensor, so that it can receive electromagnetic waves in the full frequency band. The dielectric sensing module uses a high-speed sampling ADC to record the time points of electromagnetic wave emission and reception, with a time resolution of 1ns.

[0061] The data acquisition and transmission module 23 receives the time data recorded by the dielectric sensing module 22 and transmits it to the data analysis module 24. The data acquisition and transmission module 23 supports 8-channel synchronous acquisition with a sampling rate greater than 100kHz and a 16-bit resolution. It can simultaneously acquire dielectric parameters for each frequency band, including amplitude, phase, and VSWR. The acquisition card has a built-in programmable FPGA chip for real-time data filtering and preprocessing. Furthermore, the data acquisition and transmission module 23 also includes an integrated inertial sensor that monitors sensor vibration and uses an adaptive filtering algorithm to remove abnormal data, ensuring data reliability.

[0062] The data analysis module 24 calculates the relative dielectric parameters of the slag soil based on parameters such as the propagation speed of electromagnetic waves in a vacuum, the measured time difference, and the probe length. It then converts the dielectric parameters into the moisture content of the slag soil based on the calibration relationship between the dielectric parameters and the moisture content.

[0063] Reference Figure 4 As shown: The soil moisture content data display module 3 is mainly used to display multi-dimensional data related to the moisture content of the tunnel boring machine's excavated soil in real time, so that operators can intuitively monitor the test results and early warning information;

[0064] The soil moisture content data display module 3 includes a current data display interface 31, a historical data comparison interface 32, and a multi-level early warning information display interface 33;

[0065] The current data display interface 31 shows real-time moisture content data, dielectric parameters, equipment operating status, and current environmental parameters;

[0066] The historical data comparison interface 32 displays a curve showing the trend of moisture content changes;

[0067] The multi-level early warning information display interface 33 displays threshold early warning information.

[0068] A method for determining the moisture content of construction waste includes the following steps:

[0069] S1. Collect the slag and soil from the tunnel boring machine's discharge port, pre-treat the slag and soil, and then send it to the laboratory for testing using the drying method to obtain specific data on the moisture content of the slag and soil.

[0070] S2. Conduct dielectric experiments on the same batch of slag and soil, use a dielectric spectrometer to obtain full-frequency dielectric data, and match the dielectric data of the same batch of slag and soil moisture content data one by one, and package them into a dataset.

[0071] S3. Based on the dielectric data and moisture content dataset of the slag, a corresponding model is constructed, and a large amount of dataset is fed into the model to train the model.

[0072] The excavated soil collected in step S1 needs to be collected multiple times at different locations and time periods of the tunnel boring machine.

[0073] The dielectric data in step S2 includes full-frequency dielectric data such as dielectric parameters, dielectric loss, and complex dielectric parameters at different frequencies.

[0074] The workflow of the real-time moisture content detection system for shield tunnel slag based on multi-frequency dielectric properties in this invention is as follows:

[0075] The excavated soil from the tunnel boring machine's (TBM) muck outlet enters the muck homogenization component 11 through the feed pipe 111. After being thoroughly mixed in the mechanical mixing chamber 112, it is transported to the muck foreign matter removal component 12 by the guide pipe 113. In the vibrating chamber 121, the muck undergoes screening and impurity removal by an electromagnetic separator. Finally, it enters the multi-frequency dielectric detection module 2 through the discharge pipe 122. The electromagnetic wave generator 21 emits electromagnetic waves of different frequencies into the muck through a probe. The dielectric sensing module 22 receives the reflected electromagnetic waves and records the time points. The data acquisition and transmission module 23 transmits the time data to the data analysis module 24, calculates the relative dielectric parameters of the muck, and then converts them into moisture content according to the calibration relationship. The detection results are transmitted to the muck moisture content data display module 3. The current data display interface 31 displays the moisture content and dielectric parameters in real time; the historical data comparison interface 32 records and displays the trend of moisture content changes; if the moisture content exceeds the threshold, the multi-level early warning information display interface 33 issues an early warning.

[0076] 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 real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties, characterized in that, Includes a slag pretreatment module (1), a multi-frequency dielectric detection module (2), and a slag moisture content data display module (3); The slag pretreatment module (1) crushes and removes impurities from the slag, and adsorbs and removes metal impurities that may interfere with detection. The multi-frequency dielectric detection module (2) detects the moisture content of slag by emitting electromagnetic waves of different frequencies and utilizing the characteristic that the dielectric parameters of slag change with the moisture content. The soil moisture content data display module (3) is mainly used to display multi-dimensional data related to the moisture content of tunnel boring machine soil in real time, so that operators can intuitively monitor the test results and early warning information.

2. The real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties according to claim 1, characterized in that, The multi-frequency dielectric detection module (2) includes an electromagnetic wave generator (21), a dielectric sensing module (22), a data acquisition and transmission module (23), and a data analysis module (24). The electromagnetic wave generator (21) transmits signals to the slag through a probe; The dielectric sensing module (22) is used to receive electromagnetic waves and record the time points when electromagnetic waves are emitted and received. The data acquisition and transmission module (23) receives the time data recorded by the dielectric sensing module (22) and transmits it to the data analysis module (24); The data analysis module (24) calculates the relative dielectric parameters of the slag based on the propagation speed of electromagnetic waves in a vacuum, the measured time difference, and the probe length, and converts the dielectric parameters into the moisture content of the slag based on the calibration relationship between the dielectric parameters and the moisture content.

3. The real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties according to claim 1, characterized in that, The soil moisture content data display module (3) includes a current data display interface (31), a historical data comparison interface (32), and a multi-level early warning information display interface (33). The current data display interface (31) displays real-time moisture content data, dielectric parameters, equipment operating status and current environmental parameters; The historical data comparison interface (32) displays the trend curve of water content change; The multi-level early warning information display interface (33) displays threshold early warning information.

4. The real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties according to claim 1, characterized in that, The slag pretreatment module (1) includes a slag uniform treatment component (11) and a slag foreign object removal component (12). The slag uniform treatment component (11) is used to eliminate local moisture content differences caused by uneven particle size distribution of slag. The foreign object removal component (12) is used to remove metal foreign objects from the slag particles to prevent the metal foreign objects from interfering with the detection accuracy of the multi-frequency dielectric detection module (2).

5. The real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties according to claim 4, characterized in that, The slag uniform treatment component (11) includes a feed pipe (111), a mechanical mixing chamber (112) and a guide pipe (113). The output end of the feed pipe (111) is fixedly connected to the input end of the mechanical mixing chamber (112), and one end of the guide pipe (113) is fixedly connected to the output end of the mechanical mixing chamber (112).

6. The real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties according to claim 5, characterized in that, The slag pretreatment module (1) also includes a self-cleaning device. After a single uniform treatment of slag, the self-cleaning device will sequentially introduce clean water and dry gas into the slag uniform treatment component (11) and the slag foreign object removal component (12) to rinse and dry the internal components.

7. The real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties according to claim 5, characterized in that, The foreign object removal component (12) includes a vibrating chamber (121), a discharge pipe (122), and an electromagnetic separator. The other end of the guide pipe (113) is fixedly connected to the input end of the vibrating chamber (121). The vibrating chamber (121) is equipped with a screen and a vibrating motor. The output end of the vibrating chamber (121) is fixedly connected to one end of the discharge pipe (122). The electromagnetic separator is located on one side of the screen.

8. A method for determining the moisture content of slag and soil, characterized in that, The real-time detection system for the moisture content of shield tunnel slag based on multi-frequency dielectric properties, as described in any one of claims 1-7, includes the following steps: S1. Collect the slag and soil from the tunnel boring machine's discharge port, pre-treat the slag and soil, and then send it to the laboratory for testing using the drying method to obtain specific data on the moisture content of the slag and soil. S2. Conduct dielectric experiments on the same batch of slag and soil, use a dielectric spectrometer to obtain full-frequency dielectric data, and match the dielectric data of the same batch of slag and soil moisture content data one by one, and package them into a dataset. S3. Based on the dielectric data and moisture content dataset of the slag, a corresponding model is constructed, and a large amount of dataset is fed into the model to train the model.

9. The method for determining the moisture content of slag and soil according to claim 8, characterized in that, The excavated soil collected in step S1 needs to be collected multiple times at different locations and time periods of the tunnel boring machine.

10. The method for determining the moisture content of slag and soil according to claim 8, characterized in that, The dielectric data in step S2 includes full-frequency dielectric data such as dielectric parameters, dielectric loss, and complex dielectric parameters at different frequencies.

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