A freeze-thaw test method and system for partitioned refrigeration

Abstract

The application discloses a kind of partition refrigeration freeze-thaw test method and system, system includes linkage lifting simulation system, vibration simulation system and refrigeration simulation system;Vibration simulation system includes sliding roller device, vibration table top being set on sliding roller device and rigid waterproof model box being set on vibration table top;Refrigeration simulation system is set above rigid waterproof model box, and refrigeration simulation system includes multiple columns refrigeration end towards slope model refrigeration unit, and each column refrigeration unit includes three rows of refrigeration module being set along the direction of slope model slope trend;Lifting unit includes three positions respectively corresponding three rows of refrigeration module direct-connected motor conversion box.The application can simulate overall slope frost heaving and local non-frost heaving, can adjust freeze-thaw cycle number and real-time temperature when exciting, without disassembly and secondary handling, freeze-thaw system and table top are separated, and have no influence on exciting.

Description

Technical Field

[0001] This invention relates to the field of geotechnical testing technology, specifically to a freeze-thaw test method and system using zoned cooling. Background Technology

[0002] Slopes in high-altitude and cold regions are prone to landslides under strong earthquakes. Therefore, studying the dynamic response characteristics and instability mechanisms of slopes under the coupled effects of earthquakes and low temperatures is of great significance. Currently, shaking table physical model tests are one of the most effective means of studying the instability mechanisms and dynamic responses of slopes under seismic dynamics and freeze-thaw cycles, and thus have been widely used in geotechnical engineering. Shaking table model tests that can simultaneously meet the requirements of earthquake simulation under extremely cold temperature conditions mainly include the following types: 1. Condensing pipes are installed inside the chamber and laid on the slope surface to change the temperature, but these need to be disassembled after the freeze-thaw cycle. 2. The model chamber is placed in a large refrigeration chamber for freeze-thaw cycles, and then hoisted onto the shaking table platform afterward. This method cannot effectively control temperature changes during movement. 3. A refrigeration unit is installed on top of the model chamber to form a whole, allowing for immediate vibration after the freeze-thaw cycle. However, this often changes the temperature uniformly, making it difficult to meet the experimental requirements under non-uniform freezing conditions. With the increasing importance of research on the seismic damage mechanism and anti-seismic mitigation measures of slopes in high-altitude and cold regions, it is crucial to realistically recreate the failure mechanism of slopes under the coupled action of freeze-thaw cycles and earthquakes. However, the development of a seismic simulation model box that can be integrated with a shaking table without disassembly and allows for real-time temperature control during vibration remains relatively lacking. Therefore, it is necessary to develop a shaking table model test system capable of simultaneously realizing uniform and non-uniform freezing conditions coupled with earthquakes, providing an experimental foundation for research on the dynamic response, failure mechanism, and anti-seismic mitigation measures of slopes in high-altitude and cold regions under seismic loading. Summary of the Invention

[0003] In order to at least overcome the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a freeze-thaw test method and system for zoned refrigeration.

[0004] In a first aspect, embodiments of this application provide a zoned refrigeration freeze-thaw test system, including a linkage lifting simulation system, a vibration simulation system, and a refrigeration simulation system;

[0005] The vibration simulation system includes a sliding roller device, a vibration table surface mounted on the sliding roller device, and a rigid waterproof model box mounted on the vibration table surface; the rigid waterproof model box contains a slope model.

[0006] The refrigeration simulation system is set above the rigid waterproof model box, and the refrigeration simulation system includes multiple rows of refrigeration units with refrigeration ends facing the slope model. Each row of refrigeration units includes three rows of refrigeration modules arranged along the slope direction of the slope model.

[0007] The linkage lifting simulation system includes a lifting unit; the lifting unit includes three direct-drive motor conversion boxes corresponding to three rows of refrigeration modules; the direct-drive motor conversion boxes are connected to the output end of the direct-drive motor and the corresponding refrigeration module, and convert the power output by the direct-drive motor into the vertical lifting of the corresponding refrigeration module in the rigid waterproof model box.

[0008] In one possible implementation, the direct-drive motor conversion box includes a worm gear, an electromagnetic clutch, and a lead screw and nut mechanism;

[0009] The worm gear meshes with a worm connected to the output end of a direct-drive motor; one end of the electromagnetic clutch is connected to the worm gear shaft of the worm gear, and the other end of the electromagnetic clutch is connected to one end of the lead screw of the lead screw and nut mechanism; the nut of the lead screw and nut mechanism is connected to the corresponding refrigeration module.

[0010] In one possible implementation, the cooling module includes a fan, a finned aluminum heat sink, a fan shield, cooling chips, heat transfer copper pipes, and a heat-conducting aluminum plate.

[0011] The wind turbine is installed inside the fan shield, and the fan shield is provided with a heat dissipation grille in the direction of the wind turbine's airflow.

[0012] The finned aluminum heat sink is disposed outside the heat dissipation grille and the fan protective cover; the hot end of the cooling chip is connected to the bottom of the fan protective cover, and the cold end of the cooling chip is connected to the heat-conducting aluminum plate through a heat transfer copper pipe; the heat-conducting aluminum plate faces the slope model.

[0013] In one possible implementation, two adjacent refrigeration modules include a first refrigeration module and a second refrigeration module;

[0014] The fan protective cover of the first refrigeration module is provided with a refrigeration connection groove on the side facing the second refrigeration module; the fan protective cover of the second refrigeration module is provided with a refrigeration connection groove on the side facing the first refrigeration module; the refrigeration connection groove and the refrigeration connection groove are matched.

[0015] The refrigeration connection slot is inserted into the refrigeration connection slide groove and moves vertically within the refrigeration connection slide groove.

[0016] One possible implementation also includes a supporting monitoring system and a supporting temperature measurement system;

[0017] The supporting monitoring system uses a high-speed camera, and the supporting temperature measurement system uses an infrared thermometer.

[0018] Both the supporting monitoring system and the supporting temperature measurement system face the side of the rigid waterproof model box where the rigid glass is installed, and monitor the image and temperature inside the rigid waterproof model box before displaying the image on the imaging display system.

[0019] Secondly, embodiments of this application provide a freeze-thaw test method for zoned refrigeration, including:

[0020] Determine the freeze-thaw conditions based on the geological environment of the target study area;

[0021] Based on the geological conditions of the target study area, determine the composition and mix proportion of the slope materials;

[0022] The slope material is laid in layers and compacted to form a slope model, and accelerometers and earth pressure cells are installed according to the design plan.

[0023] Based on the freeze-thaw conditions, the freeze-thaw cycles at the slope toe, slope waist, and slope top are determined respectively, and the corresponding lifting and starting / stop cycles of the refrigeration module are set.

[0024] Vibration loading tests were conducted on the slope model, and zoned freeze-thaw cycles were performed during the tests.

[0025] The mechanism of slope damage under the coupled action of earthquake and freeze-thaw was obtained by collecting and analyzing the corresponding data.

[0026] In one possible implementation, setting the corresponding lifting and start / stop cycle of the cooling module includes:

[0027] When it is necessary to simulate freezing and frost expansion in the corresponding area, the refrigeration module at the corresponding location is turned on, and the refrigeration module is lowered to a distance of less than the first preset value from the corresponding area.

[0028] When it is necessary to simulate slope melting in the corresponding area, the cooling module at the corresponding location is turned off, and the cooling module is raised to a distance greater than the second preset value from the corresponding area.

[0029] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0030] This invention can simulate overall slope frost heave and local slope non-frost heave. It can adjust the number of freeze-thaw cycles and real-time temperature during vibration. It does not require disassembly or secondary handling. The freeze-thaw system is separated from the platform and has no impact on vibration. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a three-dimensional schematic diagram of the model box in an embodiment of this application;

[0033] Figure 2 This is a side view of the model box in an embodiment of this application;

[0034] Figure 3 This is a three-dimensional schematic diagram of a small vibration table according to an embodiment of this application;

[0035] Figure 4 This is a side view of a small vibration table according to an embodiment of this application;

[0036] Figure 5 This is a three-dimensional schematic diagram of the model box in an embodiment of this application;

[0037] Figure 6 This is a three-dimensional structural diagram of the semiconductor cooling system according to an embodiment of this application;

[0038] Figure 7 This is a side view of a semiconductor cooling system according to an embodiment of this application.

[0039] The attached diagram shows the markings and corresponding component names:

[0040] 1-Linked lifting simulation system; 11-Direct motor conversion box; 2-Vibration simulation system; 21-Rigid waterproof model box; 22-Slope model; 23-Polypropylene foam board; 24-Rigid glass; 25-Vibration table surface; 26-Vibration table oil source and servo system; 27-Sliding roller device; 28-Fixing bolt; 29-Vibration table directly connected to the ground; 3-Refrigeration simulation system; 31-Wind power fan; 32-Finned aluminum heat sink; 33-Fan protective cover; 34-Refrigeration plate; 35-Heat transfer copper pipe; 36-Cooling aluminum plate; 37-Refrigeration connection slide; 38-Refrigeration connection groove; 4-Supporting monitoring system; 5-Supporting temperature measurement system; 51-Imaging display system. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0042] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] To facilitate the explanation of the above-mentioned zoned refrigeration freeze-thaw test system, please refer to the reference. Figures 1-7 This invention provides a schematic diagram of a zoned refrigeration freeze-thaw test system disclosed in an embodiment of the present invention. The zoned refrigeration freeze-thaw test system includes a linkage lifting simulation system, a vibration simulation system, and a refrigeration simulation system.

[0044] The vibration simulation system includes a sliding roller device, a vibration table surface mounted on the sliding roller device, and a rigid waterproof model box mounted on the vibration table surface; the rigid waterproof model box contains a slope model.

[0045] The refrigeration simulation system is set above the rigid waterproof model box, and the refrigeration simulation system includes multiple rows of refrigeration units with refrigeration ends facing the slope model. Each row of refrigeration units includes three rows of refrigeration modules arranged along the slope direction of the slope model.

[0046] The linkage lifting simulation system includes a lifting unit; the lifting unit includes three direct-drive motor conversion boxes corresponding to three rows of refrigeration modules; the direct-drive motor conversion boxes are connected to the output end of the direct-drive motor and the corresponding refrigeration module, and convert the power output by the direct-drive motor into the vertical lifting of the corresponding refrigeration module in the rigid waterproof model box.

[0047] The embodiments of this application aim to solve the following problems: after freeze-thaw cycles, the aforementioned system is difficult to effectively control temperature changes and requires disassembly, while also failing to meet the testing requirements under non-uniform freezing conditions. Therefore, a shaking table testing system for low-temperature freezing environments is proposed, capable of simultaneously simulating uniform and non-uniform freezing conditions and coupled with seismic forces. This system aims to realistically reproduce the dynamic response characteristics and failure mechanisms of slopes under various extreme environments, thereby improving the accuracy and authenticity of tests under freeze-thaw cycles.

[0048] In this embodiment, the sliding roller device is a guiding and motion transmission mechanism. Its main function is to achieve smooth, low-friction movement in a specific direction, while bearing the test load and accurately transmitting vibration excitation. The vibration table surface is used to support the rigid waterproof model box, in which the slope model is placed, and the vibration table provides seismic force simulation.

[0049] In this embodiment, unlike existing cooling methods, a three-row cooling unit with cooling ends facing the slope model is used to simulate freezing at the foot, middle, and top of the slope model. This cooling unit typically uses a semiconductor cooling chip. While the cooling efficiency of the semiconductor cooling chip can be controlled by adjusting the current and voltage, in actual experiments, to accelerate freeze-thaw cycles, it is often necessary to interrupt cooling of a localized area for a short period. If interruption is only achieved by switching the current on and off, the temperature of the cooling chip itself will not drop instantly, and the cooling process will prolong the experiment time, especially when simulating automatic thawing during freeze-thaw cycles. Therefore, this application employs a lifting mechanism to quickly move the cooling unit closer to or away from the slope model to interrupt and start the cooling process.

[0050] In this embodiment, the lifting process needs to be implemented through a lifting unit. Generally, two sets of lifting units can be set to improve lifting stability. Each set of lifting units is equipped with a direct-drive motor conversion box. Each direct-drive motor conversion box needs to be able to independently control the lifting of the corresponding row of refrigeration modules. It needs to convert the power output by the direct-drive motor into the vertical lifting of the refrigeration module in the rigid waterproof model box. The implementation process can be achieved by a worm gear or cam mechanism. This embodiment does not impose any limitations.

[0051] In one possible implementation, the direct-drive motor conversion box includes a worm gear, an electromagnetic clutch, and a lead screw and nut mechanism;

[0052] The worm gear meshes with a worm connected to the output end of a direct-drive motor; one end of the electromagnetic clutch is connected to the worm gear shaft of the worm gear, and the other end of the electromagnetic clutch is connected to one end of the lead screw of the lead screw and nut mechanism; the nut of the lead screw and nut mechanism is connected to the corresponding refrigeration module.

[0053] In the implementation of this application embodiment, in order to achieve miniaturization of the direct-drive motor conversion box, a worm gear mechanism is adopted. The worm needs to rotate under the drive of the direct-drive motor. At the same time, in order to achieve independent control of the lifting of each row, an electromagnetic clutch needs to be set between the worm gear shaft and the subsequent lead screw and nut mechanism. Finally, the lead screw and nut mechanism converts the power transmitted from the worm gear shaft into the lifting of the refrigeration module.

[0054] In one possible implementation, the cooling module includes a fan, a finned aluminum heat sink, a fan shield, cooling chips, heat transfer copper pipes, and a heat-conducting aluminum plate.

[0055] The wind turbine is installed inside the fan shield, and the fan shield is provided with a heat dissipation grille in the direction of the wind turbine's airflow.

[0056] The finned aluminum heat sink is disposed outside the heat dissipation grille and the fan protective cover; the hot end of the cooling chip is connected to the bottom of the fan protective cover, and the cold end of the cooling chip is connected to the heat-conducting aluminum plate through a heat transfer copper pipe; the heat-conducting aluminum plate faces the slope model.

[0057] In one possible implementation, two adjacent refrigeration modules include a first refrigeration module and a second refrigeration module;

[0058] The fan protective cover of the first refrigeration module is provided with a refrigeration connection groove on the side facing the second refrigeration module; the fan protective cover of the second refrigeration module is provided with a refrigeration connection groove on the side facing the first refrigeration module; the refrigeration connection groove and the refrigeration connection groove are matched.

[0059] The refrigeration connection slot is inserted into the refrigeration connection slide groove and moves vertically within the refrigeration connection slide groove.

[0060] One possible implementation also includes a supporting monitoring system and a supporting temperature measurement system;

[0061] The supporting monitoring system uses a high-speed camera, and the supporting temperature measurement system uses an infrared thermometer.

[0062] Both the supporting monitoring system and the supporting temperature measurement system face the side of the rigid waterproof model box where the rigid glass is installed, and monitor the image and temperature inside the rigid waterproof model box before displaying the image on the imaging display system.

[0063] In the implementation of this application embodiment, the supporting monitoring system and supporting temperature measurement system play a role in side monitoring. Conventional freeze-thaw tests require the internal installation of thermometers to measure the frost heave depth. This device can use non-contact temperature measurement, which does not affect the test results and facilitates accurate measurement of the frost heave depth inside the slope. At the same time, it is used in conjunction with a high-speed camera to measure the temperature development process and the instability and failure process.

[0064] Based on the same inventive concept, a freeze-thaw test method with zoned refrigeration is also provided, including:

[0065] Determine the freeze-thaw conditions based on the geological environment of the target study area;

[0066] Based on the geological conditions of the target study area, determine the composition and mix proportion of the slope materials;

[0067] The slope material is laid in layers and compacted to form a slope model, and accelerometers and earth pressure cells are installed according to the design plan.

[0068] Based on the freeze-thaw conditions, the freeze-thaw cycles at the slope toe, slope waist, and slope top are determined respectively, and the corresponding lifting and starting / stop cycles of the refrigeration module are set.

[0069] Vibration loading tests were conducted on the slope model, and zoned freeze-thaw cycles were performed during the tests.

[0070] The mechanism of slope damage under the coupled action of earthquake and freeze-thaw was obtained by collecting and analyzing the corresponding data.

[0071] In one possible implementation, setting the corresponding lifting and start / stop cycle of the cooling module includes:

[0072] When it is necessary to simulate freezing and frost expansion in the corresponding area, the refrigeration module at the corresponding location is turned on, and the refrigeration module is lowered to a distance of less than the first preset value from the corresponding area.

[0073] When it is necessary to simulate slope melting in the corresponding area, the cooling module at the corresponding location is turned off, and the cooling module is raised to a distance greater than the second preset value from the corresponding area.

[0074] This invention proposes an experimental system and method for simulating non-uniform freezing environments coupled with earthquakes. A linkage lifting simulation system is fixed above a vibration simulation system, allowing the cooling simulation system to be raised and lowered vertically, enabling localized freeze-thaw cycles. The cooling simulation system can be raised and lowered as a whole, or it can be raised and lowered locally or entirely along a fixed path using a chute. The vibration simulation system, through contact with the vibration table surface, simulates real earthquake excitation while the cooling simulation system performs its cooling function. Based on the relationship between uniform or non-uniform freeze-thaw cycles and slope combinations, the system simulates the dynamic response characteristics and instability failure mechanisms of slopes under non-uniform freeze-thaw cycles or overall surface freeze-thaw cycles coupled with earthquakes. Freeze-thaw cycles can also be performed after simulated earthquakes, allowing for the simulation of a wide range of scenarios.

[0075] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0076] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, or may be electrical, mechanical or other forms of connection.

[0077] The units described as separate components may or may not be physically separate. As will be apparent to those skilled in the art, the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0078] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0079] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or grid device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0080] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A zoned refrigeration freeze-thaw test system, characterized in that, It includes a linkage lifting simulation system (1), a vibration simulation system (2), and a refrigeration simulation system (3). The vibration simulation system (2) includes a sliding roller device (2), a vibration table surface (25) set on the sliding roller device (2), and a rigid waterproof model box (21) set on the vibration table surface (25); a slope model (22) is set inside the rigid waterproof model box (21). The refrigeration simulation system (3) is set above the rigid waterproof model box (21), and the refrigeration simulation system (3) includes multiple rows of refrigeration units with refrigeration ends facing the slope model (22). Each row of refrigeration units includes three rows of refrigeration modules arranged along the slope direction of the slope model (22). The linkage lifting simulation system (1) includes a lifting unit; the lifting unit includes three direct-drive motor conversion boxes (11) with three positions corresponding to three rows of refrigeration modules respectively; the direct-drive motor conversion box (11) is connected to the output end of the direct-drive motor and the corresponding refrigeration module, and converts the power output by the direct-drive motor into the vertical lifting of the corresponding refrigeration module in the rigid waterproof model box (21).

2. The freeze-thaw test system with zoned refrigeration according to claim 1, characterized in that, The direct-drive motor conversion box (11) includes a worm gear, an electromagnetic clutch, and a lead screw and nut mechanism; The worm gear meshes with a worm connected to the output end of a direct-drive motor; one end of the electromagnetic clutch is connected to the worm gear shaft of the worm gear, and the other end of the electromagnetic clutch is connected to one end of the lead screw of the lead screw and nut mechanism; the nut of the lead screw and nut mechanism is connected to the corresponding refrigeration module.

3. The freeze-thaw test system with zoned cooling according to claim 1, characterized in that, The cooling module includes a fan (31), a finned aluminum heat sink (32), a fan shield (33), a cooling plate (34), a heat transfer copper pipe (35), and a heat-conducting aluminum plate (36). The wind turbine (31) is installed inside the fan shield (33), and the fan shield (33) is provided with a heat dissipation grille in the air blowing direction of the wind turbine (31). The finned aluminum heat sink (32) is located outside the heat dissipation grille and the fan shield (33); the hot end of the cooling chip (34) is connected to the bottom of the fan shield (33), and the cold end of the cooling chip (34) is connected to the heat-conducting aluminum plate (36) through the heat transfer copper pipe (35); the heat-conducting aluminum plate (36) faces the slope model (22).

4. The freeze-thaw test system with zoned cooling according to claim 3, characterized in that, Two adjacent refrigeration modules include a first refrigeration module and a second refrigeration module; The fan shield (33) of the first refrigeration module is provided with a refrigeration connection groove (37) on the side facing the second refrigeration module; the fan shield (33) of the second refrigeration module is provided with a refrigeration connection groove (38) on the side facing the first refrigeration module; the refrigeration connection groove (37) and the refrigeration connection groove (38) are matched. The refrigeration connection groove (38) is inserted into the refrigeration connection slide (37) and moves vertically within the refrigeration connection slide (37).

5. The freeze-thaw test system with zoned cooling according to claim 1, characterized in that, It also includes a supporting monitoring system (4) and a supporting temperature measurement system (5); The supporting monitoring system (4) uses a high-speed camera, and the supporting temperature measurement system (5) uses an infrared thermometer; The supporting monitoring system (4) and the supporting temperature measurement system (5) are both facing the side of the rigid waterproof model box (21) where the rigid glass (24) is installed, and after monitoring the image and temperature inside the rigid waterproof model box (21), they image the image at the imaging display system (51).

6. A freeze-thaw test method for zoned refrigeration using the system described in any one of claims 1 to 5, characterized in that, include: Determine the freeze-thaw conditions based on the geological environment of the target study area; Based on the geological conditions of the target study area, determine the composition and mix proportion of the slope materials; The slope material was laid in layers and compacted to form a slope model (22), and accelerometers and earth pressure cells were installed according to the design scheme; Based on the freeze-thaw conditions, the freeze-thaw cycles at the slope toe, slope waist, and slope top are determined respectively, and the corresponding lifting and starting / stop cycles of the refrigeration module are set. Vibration loading tests were conducted on the slope model (22), and zoned freeze-thaw cycles were performed during the test. The mechanism of slope damage under the coupled action of earthquake and freeze-thaw was obtained by collecting and analyzing the corresponding data.

7. The freeze-thaw test method for zoned refrigeration according to claim 6, characterized in that, Setting the corresponding cooling module's lifting and start / stop cycle includes: When it is necessary to simulate freezing and frost expansion in the corresponding area, the refrigeration module at the corresponding location is turned on, and the refrigeration module is lowered to a distance of less than the first preset value from the corresponding area. When it is necessary to simulate slope melting in the corresponding area, the cooling module at the corresponding location is turned off, and the cooling module is raised to a distance greater than the second preset value from the corresponding area.

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