Device and method for automatically testing disintegration of solidified muck under water-heat-force coupling

Abstract

The invention relates to the field of geotechnical engineering, and discloses a device and a method for automatically testing disintegration of solidified muck under water-heat-force coupling. The device comprises a test container, a transmission and loading assembly, a temperature control system, a dynamic flow field simulation assembly, an image acquisition assembly and a computer processing system, and the coupling effect of a water field, a thermal field and a force field is realized in the same test space by cooperatively regulating and controlling the disintegration liquid temperature, the water flow shearing condition and the sample immersion state. According to the method, the soaking disintegration test is performed on the solidified muck sample based on the device, mechanical response data and image information are synchronously acquired in the test process, and the disintegration stabilization time is automatically judged according to the change condition of the disintegration amount along with time, so that automatic control and multi-parameter synchronous acquisition of the disintegration test process are realized; and an objective and reliable test means is provided for evaluating the water stability of the solidified muck.

Description

Technical Field

[0001] This disclosure pertains to the field of geotechnical engineering, specifically relating to an automatic testing device and method for the disintegration of solidified slag soil under water-thermal-mechanical coupling. Background Technology

[0002] With the development of urban transportation construction, a large amount of construction waste is generated during the construction process. However, in coastal areas, construction waste is mostly soft soil with poor engineering properties, requiring solidification treatment. After solidification, the waste still needs to meet the strength requirements before it can be used. The total time for soil to completely disintegrate in water is called the disintegration stabilization time, which reflects the disintegration properties of the soil in this state. As an effective indicator for evaluating soil disintegration properties, the longer the disintegration stabilization time, the better the water stability of the soil, and vice versa. Testing the disintegration and failure characteristics of solidified construction waste during immersion can provide a basis for analyzing the disintegration index of solidified construction waste.

[0003] Disintegration tests are an effective means of obtaining soil disintegration parameters. Using disintegration devices to test the disintegration and failure patterns of solidified soil during immersion provides a basis for analyzing the disintegration indices of solidified soil. However, most previous disintegration devices were relatively simple, typically calculating the disintegration amount by directly measuring the residual mass of the sample. Currently, although some improved devices exist, their overall operability is poor, temperature control during the test is difficult, they lack water flow and mechanical feedback, and test data cannot be collected in real time, resulting in certain biases and making it difficult to obtain accurate soil disintegration results, thus affecting their application in engineering practice.

[0004] Existing technologies, such as the patented integrated device and test method for determining and controlling the disintegration rate of unsaturated soil in immersion water (application number 202410069485.3), mainly have the following drawbacks: (1) Single variable control: Traditional disintegration devices only consider single variables such as "water (immersion)", "heat (temperature)" and "force (weight / water flow)", which is significantly different from the coupling effect of the three fields of "water-heat-force" in actual engineering, resulting in the test results deviating from the real service environment.

[0005] (2) Insufficient operability and precision: Temperature control relies on manual adjustment, making it difficult to achieve dynamic and precise temperature control, such as disintegration tests under different temperature gradients; lack of mechanical feedback mechanism, relying solely on visual judgment to determine the degree of disintegration, resulting in large data acquisition deviations; weak water flow scouring simulation capability, making it impossible to flexibly adjust shear force through blade speed.

[0006] (3) Low degree of automation: The test process relies on manual operation, such as adjusting the immersion height of the sample and recording images, and it is difficult to collect multi-dimensional data simultaneously, such as mechanical, image and temperature images.

[0007] Therefore, in order to address the need for water stability evaluation of solidified slag in coastal areas, and the problem that traditional devices cannot simulate the "water-heat-mechanical three-field coupling" effect under complex environments, it is urgent to propose a collaborative system integrating "transmission-temperature control-mechanical monitoring-image acquisition". Summary of the Invention

[0008] The purpose of this disclosure is to provide an automatic testing device and method for the disintegration of solidified soil under water-thermal-mechanical coupling. This addresses the shortcomings of existing disintegration devices, which treat "water," "thermal," and "mechanical" factors (related to immersion, temperature, and weight or water flow erosion) as single variables, leading to significant discrepancies between test results and the simultaneous coupling of the three fields in actual service environments. This method utilizes a controllable rotating blade-temperature control-mechanical monitoring system to achieve synergistic coupling of "water-thermal-mechanical" factors within the same test space. This realistically reproduces the entire disintegration process of solidified soil in complex environments, solving the problems of poor operability, difficult temperature control, and biased test result acquisition in traditional disintegration devices. It automates the testing process, ensures accurate data acquisition, and automatically assesses the disintegration stabilization time, providing reliable data support for the evaluation and application of the water stability of solidified soil in engineering practice. Therefore, this disclosure adopts the following technical solution: An automatic testing device for the disintegration of solidified slag under water-thermal-mechanical coupling includes: Test container, used to hold test water and contain solidified soil samples; The transmission and loading components include a servo motor, a winding device, and a tension sensor. The servo motor drives the solidified soil sample to move up and down in the test container via the winding device. The tension sensor is used to monitor the mechanical response of the sample during the disintegration process in real time. The temperature control system, including a heater, a temperature control device, and a temperature sensor, is used to adjust and monitor the water temperature in the test container in real time. The dynamic flow field simulation component includes a rotating blade and its drive controller installed inside the test container, used to apply adjustable water flow shear force to the water body during the test. Image acquisition component is used to continuously acquire morphological changes of solidified soil samples during the immersion and disintegration process. The computer processing system is electrically connected to the tensile sensor, temperature sensor, image acquisition component and controller, respectively, to realize the coordinated control of water field, thermal field and force field parameters, and to synchronously acquire and process the disintegration process data.

[0009] Furthermore, the device is configured to simultaneously adjust the water flow shear conditions, temperature conditions, and sample stress conditions during the same test process to achieve solidified slag disintegration test under the multi-field coupling of water, heat, and force.

[0010] Furthermore, the computer processing system is used to synchronously acquire and time-align the mechanical response data, temperature data, and image data obtained during the disintegration process.

[0011] Furthermore, the device constructs test conditions corresponding to different solidified soil parameters and service environments by coordinating the configuration of water flow shear conditions, sample immersion state controlled by the transmission and loading components, and temperature conditions.

[0012] Furthermore, the computer processing system, based on the mechanical response information of the sample collected by the tensile sensor, adjusts the working state of the water flow shear strength and temperature control components in real time to maintain the preset water-thermal-mechanical coupling conditions during the test.

[0013] Furthermore, the test container is made of transparent PC material and can withstand temperatures ranging from −45°C to 135°C.

[0014] Furthermore, the rotational speed of the blade is adjustable, ranging from 0 to 500 rpm, to simulate different water flow shear conditions.

[0015] Furthermore, the servo motor is used to precisely control the immersion height of the solidified soil sample in water, with a control error of no more than 0.1 mm.

[0016] According to another aspect of this disclosure, an automatic testing method for the disintegration of solidified slag under water-thermal-mechanical coupling is further provided, comprising the following steps: S1. Add disintegrating liquid to the test container, install the solidified soil sample in the sample basket, and connect the sample basket to the device through the transmission and loading components. S2. The disintegrating liquid is heated and its temperature is adjusted by a temperature control system to reach the preset test temperature, and the temperature is kept constant or adjusted according to the preset temperature change pattern during the test. S3. Adjust the installation position and observation angle of the camera through the image acquisition component to obtain image information of the solidified soil sample during the disintegration process; S4. According to the test requirements, apply water flow shear force to the disintegrating liquid through the dynamic flow field simulation component, or keep the liquid in a static state without applying water flow shear force, so as to simulate different water flow conditions. S5. After the temperature of the disintegrating liquid reaches the preset condition, control the transmission and loading components to adjust the height of the sample basket so that the solidified soil sample is immersed in the disintegrating liquid for disintegration test. S6. During the disintegration test, the disintegration morphology of the solidified soil sample is continuously acquired by the image acquisition component, and the mechanical response data of the sample during the disintegration process is acquired in real time by the tensile sensor. S7. Based on the collected mechanical response data, calculate the disintegration amount of the solidified slag soil sample at different time points, and plot the curve of disintegration amount changing with time in real time. S8. When the change in the amount of disintegration per unit time is lower than the preset threshold and continues for a preset time, the corresponding time point is automatically determined as the disintegration stabilization time of the solidified soil sample, the test results are recorded and output, and then the disintegration test ends.

[0017] The beneficial effects of this disclosure include: the above-mentioned automatic testing device and method for the disintegration of solidified soil under water-thermal-mechanical coupling effectively solves the problems of poor operability, difficult temperature control, inability to collect disintegration data in real time, and difficulty in accurately assessing the disintegration stabilization time of traditional disintegration devices. Through the transmission and loading components, the height of the sample basket can be precisely adjusted to ensure stable immersion of the solidified soil sample in the disintegration liquid. The test container, equipped with a temperature control system, can accurately control the test temperature, adapting to the disintegration test requirements under different temperature conditions. Simultaneously, the transparent PC material of the test container facilitates observation of the internal state. The speed of the impeller can be adjusted by the controller according to the difficulty of sample disintegration, allowing for precise control of the impeller speed. It accurately controls the shear force of water flow, simulates the actual water scouring environment, and flexibly adapts to easily disintegrating and difficult-to-disintegrate samples, improving the test adaptability. The tensile sensor can collect tensile data in real time, and combined with the disintegration calculation formula, it can accurately obtain the sample disintegration percentage at different time points. The two-sided camera components can flexibly adjust the observation height and distance through adjustable connecting rods, fixing rods and rotating caps. Together with the computer processing system, it synchronously collects disintegration images, records data and controls each component in a linkage manner, realizing the automation of the test process, the accuracy of data acquisition, and the automatic evaluation of disintegration stabilization time, providing reliable data support for the evaluation and application of water stability of solidified slag in engineering practice. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the automatic testing device for the disintegration of solidified slag under water-thermal-mechanical coupling as described in this disclosure.

[0019] Figure 2 This is a flowchart illustrating the automatic testing method for the disintegration of solidified slag under water-thermal-mechanical coupling as described in this disclosure. Detailed Implementation

[0020] The embodiments of this disclosure will be further described below with reference to the accompanying drawings, such as... Figure 1 As shown, this disclosure relates to an automatic testing device for the disintegration of solidified slag under water-thermal-mechanical coupling.

[0021] like Figure 1As shown, the device includes a test container assembly, which includes a test container 1. Test container 1 is made of transparent PC material, facilitating direct observation of the disintegration state of the solidified soil sample during the test. In this embodiment, the test container 1 has a temperature tolerance range of −45℃ to 135℃ to meet the disintegration test requirements under different temperature conditions.

[0022] A heater 22 is installed on the side wall of the test container 1, and the heater 22 is controlled by a temperature control device 18. A temperature sensor 19 is installed on the top of the temperature control device 18 to detect the temperature change of the disintegrating liquid in the test container 1 in real time. The temperature control device 18 is connected to a computer processing system 11 via a signal line. The computer processing system 11 controls the heater 22 based on the temperature information fed back by the temperature sensor 19, with a temperature control accuracy of ±0.5℃, thereby achieving precise adjustment and stable control of the temperature of the disintegrating liquid.

[0023] The test container 1 has a paddle 25 in the center. The paddle 25 is driven and controlled by a controller 26 to apply a controllable water flow shear force to the disintegrating liquid during the test. The rotation speed of the paddle is adjustable, with a speed range of 0–500 rpm, to simulate the effect of different water flow conditions on the disintegration behavior of solidified soil.

[0024] The bottom of the test container 1 is equipped with a valve 20 and a drain pipe 21. After the disintegration test is completed, the mixed liquid can be discharged through the drain pipe 21 by opening the valve 20 to avoid the residual liquid from interfering with subsequent tests.

[0025] A sample suspension and mechanical loading assembly is installed above the test container 1. This assembly includes a servo motor 3, a cable reel 5, a connecting rope 24, a connecting rope 7, and a tension sensor 6. The servo motor is used to precisely control the immersion height of the solidified soil sample in the water, with a control error not exceeding 0.1 mm. The servo motor 3 is fixedly mounted on the support structure above the test container 1. The servo motor 3 is connected to the winding device 5 via a crossbar 4. The winding device 5 is connected to the sample basket 8 via a connecting rope 7. The sample basket 8 is used to support the solidified soil sample 9 and can move up and down with the rotation of the winding device 5.

[0026] Tension sensor 6 is installed on the force transmission path of connecting rope 7 to collect the mechanical response signals of the sample basket 8 and solidified soil sample 9 in real time during the test. Tension sensor 6 is electrically connected to computer processing system 11, which records and processes the collected mechanical signals for subsequent analysis of disintegration amount and disintegration stabilization time.

[0027] By controlling the rotation of the servo motor 3, the height of the sample basket 8 can be precisely adjusted, thereby controlling the immersion depth and immersion process of the solidified soil sample 9 in the disintegrating liquid, and realizing the regulation of the sample immersion state.

[0028] The device also includes an image acquisition component. The image acquisition component includes a camera 12, which is connected to a fixing rod 14 via a fixing cap 13. The fixing rod 14 is connected to a fixing structure 16 via a fixing cap 15. By adjusting the positions of the fixing caps 13 and 15, the installation height and observation angle of the camera 12 can be adjusted to achieve image acquisition of the entire process of the disintegration of the solidified soil sample inside the test container 1.

[0029] The camera 12 is connected to the computer processing system 11, which receives and stores image data to enable visual recording and subsequent analysis of the disintegration process.

[0030] The test container 1 is mounted on a lower support platform 17, which is supported by support legs 23 to ensure the overall stability of the device. A fixed bracket 10 is installed on the side wall of the test container 1, which is used to install some sensors and auxiliary structures. The computer processing system 11 is mounted on an upper support platform 2, which is also supported by the fixed bracket 10.

[0031] In this embodiment, the computer processing system 11 is electrically connected to the servo motor 3, the tension sensor 6, the temperature sensor 19, the temperature control device 18, the controller 26, and the camera 12, respectively, to realize the coordinated control of water field, thermal field and force field parameters and the synchronous acquisition of multi-source data.

[0032] With the above-mentioned structural design, the automatic testing device for the disintegration of solidified slag under water-thermal-mechanical coupling of the present invention can realize temperature control, water flow shear adjustment and sample force control in the same test space, thereby realistically simulating the disintegration process of solidified slag under different working conditions, realizing automated testing and data acquisition of the disintegration process, eliminating the deviation of manual visual inspection, and achieving a disintegration amount calculation accuracy of ±0.5%.

[0033] Furthermore, Figure 2 This illustration shows a specific embodiment of the automatic testing method for the disintegration of solidified slag under water-thermal-mechanical coupling described in this disclosure. For example... Figure 2 As shown, this method uses a computer processing system to coordinate and control the water field, thermal field, and force field, and realizes the synchronous acquisition and processing of multi-source data.

[0034] In this embodiment, before the test begins, the operator loads the solidified soil sample into the sample basket and connects the basket to the servo motor and winding device via a connecting rope, thus placing the sample in a controllable lifting and lowering state. Subsequently, a predetermined volume of disintegrating liquid is added to the test container, and the initial connection of each sensor and actuator is completed.

[0035] After the test is started, the computer processing system first sends a control command to the temperature control device. The temperature control device controls the heater to operate according to the set test temperature, heating the disintegrating liquid in the test container. The temperature sensor collects the temperature signal of the disintegrating liquid in real time and feeds the temperature signal back to the computer processing system. The computer processing system adjusts the operating state of the heater according to the feedback result, so that the temperature of the disintegrating liquid reaches and is maintained at the preset test conditions, or dynamically adjusts it according to the preset temperature change program.

[0036] After the temperature conditions are established, the computer processing system sends instructions to the dynamic flow field controller according to the test requirements to control the rotation state and speed of the blades, thereby creating a water flow shearing force of corresponding intensity in the test container; when no water flow shearing force is applied, the blades remain stationary to simulate the hydrostatic collapse condition.

[0037] Subsequently, the computer processing system sends control commands to the servo motor, which drives the connecting rope via a winding device to move the sample basket vertically, gradually immersing the solidified soil sample into the disintegrating liquid. By controlling the operation of the servo motor, the immersion depth and process of the sample can be adjusted, thereby establishing the predetermined mechanical action conditions.

[0038] After the solidified soil sample is immersed in the disintegrating liquid and begins to disintegrate, a tensile sensor collects real-time force change signals of the sample and sample basket during the disintegration process and transmits the mechanical response signals to a computer processing system. Simultaneously, a camera, under the control of the computer processing system, continuously acquires images of the sample disintegration process within the test container, enabling visual recording of the disintegration morphology changes.

[0039] The computer processing system processes the collected mechanical data, calculates the disintegration amount at different time points according to the preset disintegration amount calculation model, and plots the curve of disintegration amount changing with time in real time. During the experiment, the computer processing system continuously analyzes the changes in disintegration amount. When the change in disintegration amount per unit time is lower than the set threshold and remains below the preset time, the system automatically determines the current time point as the disintegration stabilization time of the solidified soil sample and records the corresponding test results.

[0040] After the disintegration stabilization time is determined, the computer processing system sequentially issues control commands to stop the operation of the heater and impeller, and controls the servo motor to lift the sample basket out of the disintegration liquid, thus completing the disintegration test. After the test, the computer processing system can store and export the temperature data, mechanical data, and image data collected during the test for subsequent analysis and comparative studies.

[0041] Through the above-described method embodiments, the automatic testing method for the disintegration of solidified slag under water-thermal-mechanical coupling disclosed herein can achieve temperature control, water flow shear regulation, and mechanical loading control in the same test process, and realize automated monitoring of the disintegration process and objective determination of stabilization time.

Claims

1. An automatic testing device for the disintegration of solidified slag under water-thermal-mechanical coupling, characterized in that, include: Test container, used to hold test water and contain solidified soil samples; The transmission and loading components include a servo motor, a winding device, and a tension sensor. The servo motor drives the solidified soil sample to move up and down in the test container via the winding device. The tension sensor is used to monitor the mechanical response of the sample during the disintegration process in real time. The temperature control system, including a heater, a temperature control device, and a temperature sensor, is used to adjust and monitor the water temperature in the test container in real time. The dynamic flow field simulation component includes a rotating blade and its drive controller installed inside the test container, used to apply adjustable water flow shear force to the water body during the test. Image acquisition component is used to continuously acquire morphological changes of solidified soil samples during the immersion and disintegration process. The computer processing system is electrically connected to the tensile sensor, temperature sensor, image acquisition component and controller, respectively, to realize the coordinated control of water field, thermal field and force field parameters, and to synchronously acquire and process the disintegration process data.

2. The apparatus according to claim 1, characterized in that, The device is configured to simultaneously adjust the water flow shear conditions, temperature conditions, and sample stress conditions during the same test process to achieve solidified slag disintegration test under the multi-field coupling of water, heat, and force.

3. The apparatus according to claim 1, characterized in that, The computer processing system is used to synchronously acquire and time-align the mechanical response data, temperature data, and image data obtained during the disintegration process.

4. The apparatus according to claim 1, characterized in that, The device constructs test conditions corresponding to different solidified soil parameters and service environments by coordinating the configuration of water flow shear conditions, sample immersion state controlled by transmission and loading components, and temperature conditions.

5. The apparatus according to claim 1, characterized in that, The computer processing system, based on the mechanical response information of the sample collected by the tensile sensor, adjusts the working state of the water flow shear strength and temperature control components in real time to maintain the preset water-thermal-mechanical coupling conditions during the test.

6. The apparatus according to claim 1, characterized in that, The test container is made of transparent PC material and can withstand temperatures ranging from −45°C to 135°C.

7. The apparatus according to claim 1, characterized in that, The rotational speed of the blades is adjustable, ranging from 0 to 500 rpm, to simulate different water flow shear conditions.

8. The apparatus according to claim 1, characterized in that, The servo motor is used to precisely control the immersion height of the solidified soil sample in water, with a control error of no more than 0.1 mm.

9. An automatic testing method for the disintegration of solidified slag under water-thermal-mechanical coupling, characterized in that, Includes the following steps: S1. Add disintegrating liquid to the test container, install the solidified soil sample in the sample basket, and connect the sample basket to the device through the transmission and loading components. S2. The disintegrating liquid is heated and its temperature is adjusted by a temperature control system to reach the preset test temperature, and the temperature is kept constant or adjusted according to the preset temperature change pattern during the test. S3. Adjust the installation position and observation angle of the camera through the image acquisition component to obtain image information of the solidified soil sample during the disintegration process; S4. According to the test requirements, apply water flow shear force to the disintegrating liquid through the dynamic flow field simulation component, or keep the liquid in a static state without applying water flow shear force, so as to simulate different water flow conditions. S5. After the temperature of the disintegrating liquid reaches the preset condition, control the transmission and loading components to adjust the height of the sample basket so that the solidified soil sample is immersed in the disintegrating liquid for disintegration test. S6. During the disintegration test, the disintegration morphology of the solidified soil sample is continuously acquired by the image acquisition component, and the mechanical response data of the sample during the disintegration process is acquired in real time by the tensile sensor. S7. Based on the collected mechanical response data, calculate the disintegration amount of the solidified slag soil sample at different time points, and plot the curve of disintegration amount changing with time in real time. S8. When the change in the amount of disintegration per unit time is lower than the preset threshold and continues for a preset time, the corresponding time point is automatically determined as the disintegration stabilization time of the solidified soil sample, the test results are recorded and output, and then the disintegration test ends.

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