A frozen soil on-site rapid detection device

Abstract

The utility model discloses a frozen soil on -the -spot rapid detection device, especially relates to frozen soil detection technical field, including sampling mechanism, sampling mechanism top fixedly connected with drive arrangement no.

Description

Technical Field

[0001] This utility model relates to the field of frozen soil testing technology, and in particular to a rapid on-site testing device for frozen soil. Background Technology

[0002] In fields such as cold region engineering, infrastructure construction in permafrost areas, geological exploration, and environmental monitoring, the state of permafrost is a key factor in assessing the stability of engineering projects. Therefore, accurate and timely testing of permafrost is of great significance.

[0003] Existing methods for on-site testing of permafrost mostly involve sending samples to a laboratory for testing. However, the samples are easily damaged during transportation, which can affect the accuracy of the test data.

[0004] In some existing technologies, if on-site testing is not available, frozen soil samples need to be collected and transported back to the laboratory for analysis. This is especially true in remote or inaccessible frozen soil areas, which significantly prolongs the testing cycle. Furthermore, frozen soil samples may have altered physical properties during transportation due to temperature changes, vibrations, or pressure, which can easily lead to sample distortion and affect the accuracy of the test results. There is a lack of structures that facilitate on-site testing of frozen soil. Utility Model Content

[0005] The main objective of this invention is to provide a rapid on-site testing device for permafrost, which can effectively solve the problems mentioned above. In some existing technologies, if on-site testing is not available, permafrost samples need to be collected and transported back to the laboratory for analysis. This is especially true in remote or inaccessible permafrost areas, where it significantly prolongs the testing cycle. Furthermore, permafrost samples may have altered physical properties during transportation due to temperature changes, vibration, or pressure, which can easily lead to sample distortion and affect the accuracy of the test results. The invention also addresses the lack of a structure that facilitates on-site testing of permafrost.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A rapid on-site testing device for frozen soil includes a sampling mechanism. A driving device is fixedly connected to the top of the sampling mechanism. An adjustment mechanism is fixedly connected to the top of the driving device. A driving box is fixedly connected to the top of the adjustment mechanism. A handheld mechanism is fixedly connected to the outer surfaces of the adjustment mechanism and the driving box. Protective side pads are symmetrically fixedly connected to the outer surfaces of the handheld mechanism. A base plate is fixedly connected to the bottom of the handheld mechanism. A moving mechanism is fixedly connected to the upper side of the left and right ends of the base plate. A testing mechanism is installed on the rear side of the top of the base plate. A sampling groove is provided inside the base plate on the side near the sampling mechanism.

[0008] Preferably, the sampling mechanism includes two sampling blades, which are symmetrically arranged front and back. Mounting seats are symmetrically fixedly connected to the upper sides of the opposite sides of the two sampling blades. An electric telescopic rod is fixedly connected to the opposite surfaces of the two mounting seats. An installation sleeve is fixedly connected to the middle and rear side of the outer surface of the electric telescopic rod. A fixing rod is fixedly connected to the top of the installation sleeve. The top of the fixing rod is rotatably connected to the output end of the drive device.

[0009] Preferably, a fixed plate is fixedly connected to the top of the drive device, a movable seat is fixedly connected to the front end of the fixed plate, a threaded rod is threadedly connected to the inner surface of the movable seat, and bearings are rotatably connected to the upper and lower sides of the outer surface of the threaded rod. An outer frame is fixedly connected to the outer surfaces of the two bearings, and the movable seat is slidably connected to the middle of the inner surface of the outer frame.

[0010] Preferably, the upper end of the threaded rod passes through the middle of the upper part of the inner surface of the outer frame, the top of the threaded rod is rotatably connected to the output end of the drive box, a fixed frame is fixedly connected to the outer surface of the outer frame, a handle is fixedly connected to the middle of the front end of the fixed frame, and the opposite sides of the two protective side pads are respectively fixedly connected to the left and right ends of the outer surface of the fixed frame.

[0011] Preferably, a limiting component is fixedly connected to the right end of the base plate, and bearing supports two are symmetrically fixedly connected to the left end of the base plate. The inner surfaces of the two bearing supports two are rotatably connected to a threaded rod two. The outer surface of the threaded rod two is threadedly connected to a movable seat two. The outer surface of the limiting component is slidably connected to a movable seat two. A drive box two is fixedly connected to the rear end of the bearing supports two located at the rear end. The rear end of the threaded rod two is rotatably connected to the output end of the drive box two.

[0012] Preferably, the upper sides of the two opposing surfaces of the two movable seats are fixedly connected to a platform, and the bottom of the platform is slidably connected to the middle and rear side of the top of the base plate.

[0013] Preferably, a visual inspection box is fixedly connected to the top of the platform, and temperature and humidity detectors are fixedly connected symmetrically to the inner surface of the visual inspection box. A pad is provided in the middle of the inner surface of the visual inspection box, a pressure sensor is fixedly connected to the top of the pad, a pressure plate is fixedly connected to the top of the pressure sensor, and an electric telescopic rod is fixedly connected to the middle of the top of the pressure plate.

[0014] Preferably, a cover plate is snapped onto the top of the visual inspection box, the upper middle side of the outer surface of the electric telescopic rod is fixedly connected to the middle of the inner surface of the cover plate, a control panel is fixedly connected to the middle of the rear end of the base plate, and a limit plate is fixedly connected to the rear side of the top of the base plate near the fixed frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This device, through its designed sampling mechanism, allows for adjustment of the sampling blade's vertical height via an adjustment mechanism. Driven by the first drive unit, it rotates to sample frozen soil. After sampling, the electric telescopic rod retracts, clamping and removing the frozen soil in one piece. This method of removing the entire piece minimizes disturbance to the frozen soil structure, ensuring the original state of the sample. This provides a more reliable foundation for subsequent testing compared to crushing soil. Furthermore, the front end of the adjustment mechanism is equipped with a handheld mechanism, allowing for easy movement of the device and achieving portability.

[0017] 2. This device features a designed detection mechanism that integrates with the sampling mechanism. After sampling, the sample is placed inside the visual detection box and tested on-site using the device at the detection mechanism. This eliminates the hassle of transporting the sample to a laboratory and avoids structural damage to the frozen soil sample during transportation due to temperature changes or mechanical operations, thus helping to obtain more accurate data from the sample. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial cross-sectional view of the adjustment mechanism of this utility model;

[0020] Figure 3 This is a partial cross-sectional view of the sampling mechanism of this utility model.

[0021] Figure 4 This is a schematic diagram of the explosion effect structure of the detection mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the limiting component structure of this utility model.

[0023] In the diagram: 1. Sampling mechanism; 101. Sampling blade; 102. Mounting base; 103. Electric telescopic rod (first type); 104. Mounting sleeve; 105. Fixing rod; 2. Drive device (first type); 3. Adjustment mechanism; 301. Fixing plate; 302. Moving base (first type); 303. Threaded rod (first type); 304. Bearing (first type); 305. Outer frame; 4. Handheld mechanism; 401. Fixing frame; 402. Handle; 5. Detection mechanism; 501. Visual inspection box; 502. 503. Temperature and humidity detector; 504. Pad; 505. Pressure sensor; 506. Pressure plate; 507. Electric telescopic rod II; 508. Cover plate; 509. Platform; 510. Control panel; 6. Limiting plate; 6. Moving mechanism; 601. Bearing support II; 602. Threaded rod II; 603. Moving seat II; 604. Drive box II; 605. Limiting assembly; 7. Base plate; 8. Protective side pad; 9. Drive box III; 10. Sampling slot. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] Example 1, as Figure 1 As shown, a rapid on-site testing device for frozen soil includes a sampling mechanism 1. A driving device 2 is fixedly connected to the top of the sampling mechanism 1. An adjustment mechanism 3 is fixedly connected to the top of the driving device 2. A driving box 9 is fixedly connected to the top of the adjustment mechanism 3. A handheld mechanism 4 is fixedly connected to the outer surfaces of the adjustment mechanism 3 and the driving box 9. Protective side pads 8 are symmetrically fixedly connected to the left and right sides of the outer surface of the handheld mechanism 4. A base plate 7 is fixedly connected to the bottom of the handheld mechanism 4. A moving mechanism 6 is fixedly connected to the upper side of the left and right ends of the base plate 7. A testing mechanism 5 is installed on the rear side of the top of the base plate 7. A sampling groove 10 is provided inside the base plate 7 on the side near the sampling mechanism 1.

[0026] In this embodiment, the device is placed on top of the frozen soil to be sampled and tested. The driving device 2 drives the fixed rod 105 to rotate, and the driving box 9 drives the threaded rod 303 to rotate, thereby adjusting the vertical height of the sampling head 101. With the rotation of the two sampling heads 101, the sampling head 101 moves downward, allowing it to penetrate deep into the soil layer. When the sampling head 101 reaches the required position, the electric telescopic rod 103 is controlled to retract slightly, pulling the front sampling head 101 closer to the rear, thereby clamping the frozen soil sample on the opposite side of the two sampling heads 101.

[0027] Then, drive box 39 drives threaded rod 303 to rotate in the opposite direction, pulling the sampling head 101 and the sample upward. When the bottom of the sampling head 101 moves to a height higher than the cover plate 507, the movement of the sampling head 101 is stopped, the cover plate 507 is opened, drive box 2 604 drives threaded rod 2 602 to rotate, and threaded rod 2 602 rotates with moving seat 2 603, thereby driving the detection mechanism 5 to move forward to the top of the sampling slot 10.

[0028] The sampling blade 101 and the sample are moved down into the interior of the visual inspection box 501. The electric telescopic rod 103 is stretched slightly to increase the distance between the front sampling blade 101 and the rear sampling blade 101. The frozen soil sample can then be placed in the middle position inside the visual inspection box 501. Then the sampling blade 101 is moved up and out of the interior of the visual inspection box 501. The cover plate 507 is then placed back on the top of the visual inspection box 501.

[0029] Two temperature and humidity detectors 502 detect the internal temperature of the sample from the left and right sides in a non-contact manner, and then transmit the data to the control panel 509 to obtain the current test data of the frozen soil sample. A pressure plate 505 and a pressure sensor 504 are added inside the cover plate 507. The hardness of the sample can be detected under the action of the pressure sensor 504 and the electric telescopic rod 506. This achieves the effect of combining the test data here with the test data of the temperature and humidity sensors, so as to more comprehensively evaluate the performance of the frozen soil.

[0030] By setting up the handheld mechanism 4, the device can be moved easily. The protective side pad 8 can protect the hands from the side, preventing wear and tear on the hands when the hand is supported by the handheld mechanism 4 during sampling. The overall operation is simple and convenient.

[0031] For details, please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the sampling mechanism 1 includes two sampling blades 101, which are arranged symmetrically front to back. Mounting bases 102 are fixedly connected symmetrically to the upper sides of the opposite sides of the two sampling blades 101. Electric telescopic rod 103 is fixedly connected to the opposite surfaces of the two mounting bases 102. Mounting sleeve 104 is fixedly connected to the middle and rear side of the outer surface of electric telescopic rod 103. Fixing rod 105 is fixedly connected to the top of mounting sleeve 104. The top of fixing rod 105 is rotatably connected to the output end of driving device 2.

[0032] Further reference Figure 1 and Figure 2In this embodiment, a fixed plate 301 is fixedly connected to the top of the drive device 2, and a movable seat 302 is fixedly connected to the front end of the fixed plate 301. A threaded rod 303 is threadedly connected to the inner surface of the movable seat 302. Bearings 304 are rotatably connected to the upper and lower sides of the outer surface of the threaded rod 303. An outer frame 305 is fixedly connected to the outer surfaces of the two bearings 304. The movable seat 302 is slidably connected to the middle of the inner surface of the outer frame 305.

[0033] Further reference Figure 1 and Figure 2 In this embodiment, the upper end of the threaded rod 303 passes through the middle of the upper part of the inner surface of the outer frame 305, the top of the threaded rod 303 is rotatably connected to the output end of the drive box 9, a fixed frame 401 is fixedly connected to the outer surface of the outer frame 305, a handle 402 is fixedly connected to the middle of the front end of the fixed frame 401, and the opposite sides of the two protective side pads 8 are respectively fixedly connected to the left and right ends of the outer surface of the fixed frame 401.

[0034] The sampling mechanism 1 and the driving device 2 drive the fixed rod 105 to rotate. The vertical height of the sampling blade 101 is adjusted by the adjusting mechanism 3. Under the drive of the driving device 2, the frozen soil is sampled by rotation. After sampling, the electric telescopic rod 103 retracts to clamp and remove the frozen soil. The whole-piece removal method can minimize the disturbance to the frozen soil structure and ensure the original state of the sample. This helps to provide a more reliable foundation for subsequent testing compared to crushed soil. In addition, the front end of the adjusting mechanism 3 is equipped with a hand-held mechanism 4. The hand handle 402 makes it easy to move the device, thus achieving a portable effect.

[0035] Example 2: Based on Example 1, this example adds a detection mechanism 5 for testing the frozen soil sample taken from the sampling mechanism 1, and a moving mechanism 6 for adjusting the position of the detection mechanism 5. By setting up the detection mechanism 5, the sample can be tested on-site, avoiding structural damage to the frozen soil sample due to temperature changes or mechanical operation during transportation, thereby helping to obtain more accurate data from the sample.

[0036] For details, please refer to Figure 1 , Figure 4 and Figure 5In this embodiment, a limiting component 605 is fixedly connected to the right end of the base plate 7, and a bearing support 601 is fixedly connected to the left end of the base plate 7 symmetrically. The inner surfaces of the two bearing supports 601 are rotatably connected to a threaded rod 602. The outer surface of the threaded rod 602 is threadedly connected to a movable seat 603. The outer surface of the limiting component 605 is slidably connected to the movable seat 603. The rear end of the bearing support 601 is fixedly connected to a drive box 604. The rear end of the threaded rod 602 is rotatably connected to the output end of the drive box 604.

[0037] Further reference Figure 4 and Figure 5 In this embodiment, the upper sides of the opposite surfaces of the two movable seats 603 are fixedly connected to a platform 508, and the bottom of the platform 508 is slidably connected to the middle and rear side of the top of the base plate 7.

[0038] Further reference Figure 4 and Figure 5 In this embodiment, a visual detection box 501 is fixedly connected to the top of the platform 508. Temperature and humidity detectors 502 are fixedly connected symmetrically to the inner surface of the visual detection box 501. A pad 503 is provided in the middle of the inner surface of the visual detection box 501. A pressure sensor 504 is fixedly connected to the top of the pad 503. A pressure plate 505 is fixedly connected to the top of the pressure sensor 504. An electric telescopic rod 506 is fixedly connected to the middle of the top of the pressure plate 505.

[0039] Further reference Figure 4 and Figure 5 In this embodiment, a cover plate 507 is snapped onto the top of the visual detection box 501, and the upper middle side of the outer surface of the electric telescopic rod 506 is fixedly connected to the middle of the inner surface of the cover plate 507. A control panel 509 is fixedly connected to the middle of the rear end of the bottom plate 7, and a limit plate 510 is fixedly connected to the rear side of the top of the bottom plate 7 near the fixed frame 401.

[0040] The detection mechanism 5 is designed and installed together with the sampling mechanism 1. After sampling at the sampling mechanism 1, the sample is placed inside the visual detection box 501 and can be tested on-site through the device at the detection mechanism 5. This eliminates the trouble of transporting the sample to the laboratory for testing and can avoid structural damage to the frozen soil sample caused by temperature changes or mechanical operation during transportation, thus helping to obtain more accurate data from the sample.

[0041] Example 3: This example further limits the material of the device;

[0042] The sampling tip 101 is made of a low-temperature resistant alloy, such as 304L stainless steel or titanium alloy, to prevent the sampling tip 101 from becoming brittle in environments below -20°C, which would affect the integrity of the sample.

[0043] In this solution, a calibration module can be added inside the temperature and humidity detector 502. Since the air in the permafrost region is dry, adding a calibration module helps to improve the long-term stability of the temperature and humidity detector 502 when used in a low-temperature environment.

[0044] A polyurethane insulation layer with a thickness of ≥50mm is added to the body of the visual inspection box 501. A double-layer vacuum glass observation window can be used to avoid interference with the test data when used in an environment with an average annual temperature of -5℃ to -10℃.

[0045] Serrated anti-slip patterns or retractable anti-slip studs are added at 7 points on the base plate to prevent slipping when used on ice or frozen soil slopes.

[0046] The drive unit 12 and drive box 2604 in this solution are powered by an external mobile battery. To avoid the battery capacity being greatly reduced by the low temperature at high altitudes, an insulation sleeve is added to the outside of the mobile power supply to ensure that it can work continuously for ≥10 hours.

[0047] This solution adds a GPS positioning module and data cloud transmission function to control panel 509 to facilitate remote monitoring of real-time data of detection points. Altitude compensation is also added to control panel 509 to correct the adverse effects of air pressure at different altitudes, such as above 4500m, on pressure sensor (504).

[0048] The temperature and humidity detector 502 in this solution can be the existing CEM DT-616CT temperature and humidity meter, which uses non-contact measurement of temperature and humidity, has a built-in laser sight for easy and accurate aiming at the target, and measures temperature range from -50℃ to 500℃ and humidity range from 0% to 95%RH. The resolution is 0.1℃ for temperature and 0.1%RH for humidity. It is suitable for on-site temperature detection of frozen soil samples and is suitable for situations that require rapid measurement without disturbing the sample.

[0049] The calibration module installed inside the temperature and humidity detector 502 in this solution to improve detection accuracy can adopt the existing Cryo-Cal-2 EDL cryogenic calibrator, model: Cryo-Cal-2, manufacturer: Shandong Ouwei Electronic Technology Co., Ltd. It is designed for cryogenic environments and is suitable for calibration in the range of -196℃ to room temperature. It uses a high-precision temperature sensor to ensure the accuracy of temperature and humidity detection under low temperature conditions. It supports automatic calibration function, which can reduce human error and improve detection efficiency. It is very suitable for the calibration needs of temperature and humidity detectors in frozen soil field sampling and testing devices, especially in extremely cold environments.

[0050] In this solution, drive device 1 2, drive box 2 604 and drive box 3 9 all include an outer mounting box, a drive motor and a controller. A bearing seat is also added to the middle of the bottom of the inner surface of the outer mounting box of drive device 1 2. The drive motor and controller are installed inside the outer mounting box. The controller located at the same location can be a motor controller that can be matched with the drive motor in the same location in the prior art, which can play the role of controlling the switching and rotation speed of the drive motor.

[0051] The GPS positioning module added at control panel 509 in this solution can adopt the existing UB482GNSS positioning and orientation module, which supports multi-system positioning and can receive GPS L1 / L2, Beidou B1 / B2, GLONASS L1 / L2 and Galileo E1 / E5b frequencies. It is suitable for high-precision positioning in complex environments, supports RTK differential positioning, and the positioning accuracy can reach the centimeter level. It is suitable for high-precision positioning requirements, supports dual-antenna direction finding, and has a data update rate of up to 20Hz. It can quickly respond to dynamic changes and has an operating temperature range of -40 to 85℃. It is suitable for long-term use in harsh environments and is suitable for field monitoring of detection points that require high-precision positioning and real-time data transmission, such as permafrost field sampling and detection devices.

[0052] The data cloud transmission device added to control panel 509 in this solution can adopt the existing MC509 3G EVDO GPS communication module, which integrates 3G communication function, supports data transmission and SMS mode, is suitable for remote monitoring scenarios, has an operating temperature range of -30℃ to +75℃, and an extreme operating temperature of -40℃ to +85℃. It has good cold resistance, low power consumption design, supports automatic temperature rise protection, is suitable for long-term field work, and is suitable for field environments that require stable data transmission, such as real-time monitoring of detection points in remote areas.

[0053] Since the above devices are all very mature products in the prior art, they will not be described in detail in this application.

[0054] It should be noted that the specific installation methods, circuit connection methods, and control methods of the drive device 12, drive box 2604, and drive box 39 used in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rapid on-site detection device for frozen soil, comprising a sampling mechanism (1), characterized in that: The sampling mechanism (1) is fixedly connected to a drive device (2) at the top. The drive device (2) is fixedly connected to an adjustment mechanism (3) at the top. The adjustment mechanism (3) is fixedly connected to a drive box (9) at the top. The outer surfaces of the adjustment mechanism (3) and the drive box (9) are fixedly connected to a handheld mechanism (4). The outer surfaces of the handheld mechanism (4) are symmetrically connected to protective side pads (8). The bottom of the handheld mechanism (4) is fixedly connected to a base plate (7). The upper sides of the left and right ends of the base plate (7) are fixedly connected to a moving mechanism (6). The rear side of the top of the base plate (7) is equipped with a detection mechanism (5). The inside of the base plate (7) is provided with a sampling groove (10) on the side close to the sampling mechanism (1).

2. The rapid on-site detection device for frozen soil according to claim 1, characterized in that: The sampling mechanism (1) includes two sampling blades (101), which are arranged symmetrically front to back. Mounting bases (102) are fixedly connected symmetrically on the upper side of the opposite side of the two sampling blades (101). Electric telescopic rod (103) is fixedly connected to the opposite side of the two mounting bases (102). Mounting sleeve (104) is fixedly connected to the middle and rear side of the outer surface of the electric telescopic rod (103). Fixing rod (105) is fixedly connected to the top of the mounting sleeve (104). The top of the fixing rod (105) is rotatably connected to the output end of the driving device (2).

3. The rapid on-site detection device for frozen soil according to claim 1, characterized in that: The top of the drive device (2) is fixedly connected to a fixed plate (301), and the front end of the fixed plate (301) is fixedly connected to a movable seat (302). The inner surface of the movable seat (302) is threadedly connected to a threaded rod (303). The upper and lower sides of the outer surface of the threaded rod (303) are rotatably connected to bearings (304). The outer surfaces of the two bearings (304) are fixedly connected to an outer frame (305). The movable seat (302) is slidably connected to the middle of the inner surface of the outer frame (305).

4. The rapid on-site detection device for frozen soil according to claim 3, characterized in that: The upper end of the threaded rod (303) passes through the middle of the upper part of the inner surface of the outer frame (305). The top of the threaded rod (303) is rotatably connected to the output end of the drive box (9). A fixed frame (401) is fixedly connected to the outer surface of the outer frame (305). A handle (402) is fixedly connected to the middle of the front end of the fixed frame (401). The opposite sides of the two protective side pads (8) are respectively fixedly connected to the left and right ends of the outer surface of the fixed frame (401).

5. The rapid on-site detection device for frozen soil according to claim 1, characterized in that: The right end of the base plate (7) is fixedly connected to a limiting component (605), and the left end of the base plate (7) is symmetrically fixedly connected to a bearing support (601). The inner surfaces of the two bearing supports (601) are rotatably connected to a threaded rod (602). The outer surface of the threaded rod (602) is threadedly connected to a movable seat (603). The outer surface of the limiting component (605) is slidably connected to the movable seat (603). The rear end of the bearing support (601) located at the rear end is fixedly connected to a drive box (604). The rear end of the threaded rod (602) is rotatably connected to the output end of the drive box (604).

6. The rapid on-site detection device for frozen soil according to claim 5, characterized in that: The upper sides of the two opposing surfaces of the two movable seats (603) are fixedly connected to a platform (508), and the bottom of the platform (508) is slidably connected to the middle and rear side of the top of the base plate (7).

7. The rapid on-site detection device for frozen soil according to claim 6, characterized in that: A visual inspection box (501) is fixedly connected to the top of the platform (508). Temperature and humidity detectors (502) are fixedly connected symmetrically to the inner surface of the visual inspection box (501). A pad (503) is provided in the middle of the inner surface of the visual inspection box (501). A pressure sensor (504) is fixedly connected to the top of the pad (503). A pressure plate (505) is fixedly connected to the top of the pressure sensor (504). An electric telescopic rod (506) is fixedly connected to the middle of the top of the pressure plate (505).

8. The rapid on-site detection device for frozen soil according to claim 7, characterized in that: The top of the visual inspection box (501) is fitted with a cover plate (507). The upper middle side of the outer surface of the electric telescopic rod (506) is fixedly connected to the middle of the inner surface of the cover plate (507). The middle of the rear end of the base plate (7) is fixedly connected with a control panel (509). The rear side of the top of the base plate (7) near the fixed frame (401) is fixedly connected with a limit plate (510).

Images