Saturated soil ice lens growth observation test device

Abstract

The utility model provides a saturated soil ice lens growth observation test device which comprises a supporting part and a container arranged on the supporting part and used for loading saturated soil, a first heat exchange part is arranged on the upper side of the container, a second heat exchange part is arranged on the lower side of the container, and a water supply part is arranged between the second heat exchange part and the container. Supplementary water of the water supply part can enter the saturated soil through the container, the pressure applying mechanism is connected with the first heat exchange part and can drive the first heat exchange part to move in the container in the axial direction of the container and provide constant pressure for the saturated soil, and the container is made of a transparent material so that growth of the ice lens can be observed conveniently; the container is made of a transparent material, so that researchers are allowed to directly observe the whole process of moisture migration, ice lens formation and growth in the freezing process of saturated soil under the condition that the test environment is not damaged, and the researchers can more intuitively know the growth characteristics of the ice lens under different conditions; comprise the shape, the size, the growth speed and the like, and powerful support is provided for deeply researching the growth mechanism of the ice lens.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature medium storage, in particular to a saturated soil ice lens growth observation test device. Background Art

[0002] In-depth research on the growth of ice lenses in one-dimensional frozen soil is of great significance in geological engineering and geocryology. The formation and growth of ice lenses are the result of the interaction between water migration, temperature changes, and pressure conditions in frozen soil. These phenomena have significant impacts on the stability of frozen soil engineering, soil mechanical properties, and the sealing of gases and liquids in frozen soil.

[0003] To gain a deeper understanding of the growth mechanism of ice lenses, specialized experimental setups are needed to simulate and observe the water migration, ice lens formation, and growth of one-dimensional saturated soil during freezing. These setups need to be able to precisely control the soil temperature distribution, apply constant external pressure, and allow for real-time measurement of the growth size of the ice lens.

[0004] Existing experimental devices have limitations in their functionality and structural design. For example, while some can observe ice lens formation, they cannot directly load saturated soil or apply constant external pressure. Others, while capable of applying pressure, lack observation windows, making real-time observation of ice lens growth impossible. Still others have complex structures and fragmented functions, making it difficult to simultaneously meet the requirements of temperature control, water supply, pressure application, and observation and monitoring.

[0005] The utility model provides a saturated soil ice lens growth observation device to solve one or more problems of the above-mentioned prior art. Utility Model Content

[0006] The purpose of the utility model is to solve the technical problem in the prior art that the growth process of the ice lens cannot be observed in real time.

[0007] In order to solve the above technical problems, the utility model provides a saturated soil ice lens growth observation test device, which includes: a support component, a container arranged on the support component for loading saturated soil, a first heat exchange component is arranged on the upper side of the container, and a second heat exchange component is arranged on the lower side. A water supply component is arranged between the second heat exchange component and the container, and the replenished water of the water supply component can enter the saturated soil through the container. A pressure mechanism is located above the container, and the pressure mechanism is connected to the first heat exchange component. The pressure mechanism can drive the first heat exchange component to move axially in the container to provide constant pressure for the saturated soil. The container is made of a transparent material to facilitate the observation of ice lens growth.

[0008] Furthermore, the container is divided into a first half container and a second half container in a radial direction, and the first half container and the second half container are detachably connected to each other to facilitate loading and unloading of saturated soil.

[0009] Furthermore, an observation area is provided on the surface of the container, and the outside of the observation area is wrapped with heat-insulating material.

[0010] Furthermore, the pressure-applying mechanism includes a cylinder arranged on the supporting component, an output end of the cylinder is connected to the first heat exchange component, and the cylinder is connected to an external gas source pipeline.

[0011] Furthermore, the pressure-applying mechanism also includes a three-way connector and a pressure relief valve. One end of the three-way connector is connected to the cylinder input interface, and the other two ends are connected to the external air source and the pressure relief valve in a one-to-one correspondence.

[0012] Furthermore, the supporting component includes a base and a supporting frame arranged on the base, a mounting flange is fixedly provided on the upper portion of the supporting frame, and the pressure structure is installed on the mounting flange.

[0013] Furthermore, it also includes an adjustable support frame and a laser rangefinder arranged on the adjustable support frame. The adjustable support frame is arranged on the mounting flange. The adjustable support frame can move radially along the container on the mounting flange to adjust the radial position of the laser rangefinder in the container. A vertical mounting groove is provided on the adjustable support frame, and the laser rangefinder can move up and down along the mounting groove to adjust its height.

[0014] Furthermore, the temperature of the second heat exchange component is higher than that of the first heat exchange component, so as to form a stable temperature difference between the two ends of the container.

[0015] Furthermore, the first heat exchange component and the second heat exchange component both have a liquid inlet and a liquid outlet. The liquid inlet of the first heat exchange component is connected to an external low-temperature medium source, and the liquid outlet of the first heat exchange component is connected to the liquid inlet of the second heat exchange component through a hose. After the low-temperature medium exchanges heat with the saturated soil, it enters the second heat exchange component through the liquid outlet and the hose of the first heat exchange component.

[0016] Furthermore, a heater is provided between the second heat exchanger and the container, and the heater can adjust the temperature difference between the two ends of the container.

[0017] It can be seen from the above technical solution that the beneficial effects of the present invention are: the container is made of transparent material, allowing researchers to directly observe the entire process of water migration, ice lens formation and growth in saturated soil during freezing without destroying the experimental environment, allowing researchers to more intuitively understand the growth characteristics of ice lenses under different conditions, including their shape, size and growth rate, etc., providing strong support for in-depth research on the growth mechanism of ice lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the three-dimensional structure of the ice lens growth observation test device provided in this application.

[0019] Figure 2 This is an exploded view of the ice lens growth observation test device provided by this application.

[0020] Figure 3 It is a partial cross-sectional view of the ice lens growth observation test device provided in this application.

[0021] Figure 4 This is a partial structural diagram of the ice lens growth observation test device provided in this application.

[0022] The description of the accompanying drawings is as follows: 1. Base; 11. Second heat exchange component; 12. Heater; 13. Support seat; 131. Annular groove; 14. Container; 141. First half container; 142. Second half container; 143. Permeable stone, 144. Fixed block; 15. Support frame; 151. Mounting flange; 152. Cylinder; 1521. T-joint; 1522. Overflow valve; 153. First heat exchange component; 154. Adjustable support frame; 155. Laser rangefinder; 2. Hose. DETAILED DESCRIPTION

[0023] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative in nature and not to limit the present invention.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] In order to further illustrate the principle and structure of the present utility model, the preferred embodiments of the present utility model are now described in detail with reference to the accompanying drawings.

[0026] See also Figure 1-4 , a saturated soil ice lens growth observation test device provided in this embodiment includes a hollow cylindrical container 14, a first heat exchange component 153 arranged on the upper side of the container 14, and a second heat exchange component 11 on the lower side. The container 14 is used to load saturated soil. The first heat exchange component 153 directly acts on the saturated soil to provide temperature conditions for the formation of ice lenses. The temperature of the second heat exchanger is higher than that of the first heat exchanger to form a stable temperature difference at both ends of the container 14.

[0027] Furthermore, the container 14 is made of a transparent material. The transparent container 14 allows researchers to directly observe the entire process of water migration, ice lens formation and growth in saturated soil during freezing without destroying the experimental environment. The growth status of the ice lens, including its shape, size and growth rate, can be monitored in real time, which is of great significance for studying the growth characteristics of ice lenses under different conditions.

[0028] Furthermore, container 14 is radially divided into a first half container 141 and a second half container 142. The first half container 141 and the second half container 142 are detachably connected. The split container 14 makes it easier to load saturated soil into container 14 after it has been prepared. This design avoids the need to open the entire container 14 and clean the interior to load the soil, thereby improving operational convenience and efficiency. Furthermore, after the experiment is completed, the split container 14 can be easily disassembled for further research and analysis of the ice lens and frozen soil. This design improves the flexibility and repeatability of the experiment, allowing researchers to gain a deeper understanding of the growth mechanism and characteristics of ice lenses.

[0029] Furthermore, as shown in the figure, both sides of the docking surface of the first half container 141 and the second half container 142 extend outward to form a protruding fixing block 144. A plurality of through holes are provided on the fixing block 144. Experimenters can pass bolts through the through holes and fit nuts to achieve a detachable connection between the first half container 141 and the second half container 142.

[0030] Furthermore, a sealing groove extending from bottom to top is formed between the first half container 141 and the second half container 142 , and a silicone sealing strip is provided in the sealing groove to enhance the sealing performance of the container 14 .

[0031] Furthermore, an observation area is provided on the surface of the container 14. In this embodiment, the observation area is the protruding fixed block 144 mentioned above. The fixed block 144 is a transparent material integrally formed with the container 14. The experimenter can observe the growth process of the ice lens through the fixed block 144. The non-protruding portion of the outer surface of the container 14 (the portion outside the observation area) is wrapped with a thermal insulation material.

[0032] Furthermore, a plurality of thermocouple mounting holes are provided on the outer wall of the container 14 for monitoring the temperature gradient of the frozen soil from top to bottom.

[0033] Furthermore, it also includes a supporting component. The container 14, the first heat exchange component 153 and the second heat exchange component 11 mentioned above are all arranged on the supporting component. The supporting component includes a base 1 and a support frame 15 arranged on the base 1. A mounting flange 151 is fixedly provided on the upper part of the support frame 15. The first heat exchange component 153 is connected to the mounting flange 151. The second heat exchanger and the container 14 are arranged on the base 1 in sequence from bottom to top.

[0034] Furthermore, it also includes a pressure-applying mechanism fixedly arranged on the mounting flange 151, and the first heat exchange component 153 is arranged on the pressure-applying mechanism. The pressure-applying mechanism can drive the first heat exchange component 153 to move axially along the container 14 in the container 14. The pressure-applying mechanism provides different levels of constant pressure to the frozen soil in the container 14 through the first heat exchange component 153. This is used to simulate and maintain a constant covering pressure on the soil during the growth of the ice lens, thereby studying the growth characteristics of the ice lens under different pressure conditions.

[0035] Furthermore, the above-mentioned pressure-applying mechanism can be an air cylinder 152 or an oil cylinder. Preferably, the pressure-applying mechanism is an air cylinder 152. When the pressure-applying mechanism is an air cylinder 152, the first heat exchange component 153 is arranged on the output end of the cylinder 152, and the cylinder 152 is connected to an external air source, and the external air source provides the cylinder 152 with a pressure source of different levels.

[0036] During the growth of the ice lens, the pressure increases as the soil pushes upward on the pressure-applying mechanism due to frost heave or the increase in the volume of the ice lens. To achieve a constant output pressure from cylinder 152, the pressure-applying mechanism also includes a three-way connector 1521. One end of three-way connector 1521 is connected to the input interface of cylinder 152, and the other two ends are connected to the external air source and the pressure relief valve. Relief valve 1522 can be preset to different pressure limits. When the pressure increases, relief valve 1522 can sense this pressure change and promptly release the excess pressure when the pressure exceeds the preset value. This ensures that the pressure applied to the soil remains constant during soil freezing and ice lens growth. This is crucial for simulating the constant overburden pressure on the soil in actual geological environments and helps to obtain accurate and reliable test results.

[0037] Furthermore, it also includes a distance measuring mechanism arranged on the mounting flange 151, which measures the displacement of the ice lens caused by pushing the upper frozen soil during its growth process, providing key data for studying the growth characteristics of the ice lens.

[0038] Furthermore, the distance measuring mechanism is a laser measuring instrument, which corresponds to the first heat exchange component 153. The laser rangefinder 155 can non-contactly measure the displacement of the ice lens pushing the first heat exchange component 153 during its growth process. The laser rangefinder 155 can capture this tiny displacement change and convert it into specific numerical data. This measurement method can record the growth dynamics of the ice lens in real time and accurately, which is of great significance for analyzing the growth rate, growth morphology and growth law of the ice lens under different conditions.

[0039] Furthermore, an adjustable support frame 154 is provided on the mounting flange 151, and the laser rangefinder 155 is arranged on the adjustable support frame 154. The adjustable support frame 154 can move radially along the container 14 on the mounting flange 151, and is used to adjust the radial position of the laser rangefinder 155 in the container 14 so that the laser rangefinder 155 corresponds to the first heat exchange component 153; a vertical mounting groove is provided on the adjustable support frame 154, and the laser rangefinder 155 is installed on the adjustable support frame 154 through the mounting groove. The laser rangefinder 155 can move up and down along the mounting groove to adjust its height.

[0040] Furthermore, the first heat exchange component 153 and the second heat exchange component 11 are provided with cooling capacity by a cooling device. Specifically, the first heat exchange component 153 and the second heat exchange component 11 both have a liquid inlet and a liquid outlet. The liquid inlet of the first heat exchange component 153 is connected to an external cooling device. The low-temperature medium provided by the external cooling device enters the first heat exchange component 153. The low-temperature medium exchanges heat with the saturated soil through the outer shell of the first heat exchange component 153. The low-temperature medium can be low-temperature anhydrous ethanol. The liquid outlet of the first heat exchange component 153 is connected to the liquid inlet of the second heat exchange component 11 through a hose 2. After heat exchange, the low-temperature medium enters the second heat exchange component 11 through the liquid outlet of the first heat exchange component 153 and the hose 2. The low-temperature medium after heat exchange provides a stable temperature for the second heat exchange component 11, so as to form a stable temperature difference between the upper and lower sides of the container 14, thereby forming a stable temperature gradient; the liquid outlet of the second heat exchange component 11 is connected to the cooling device, and the low-temperature medium can flow back to the cooling device through the liquid outlet of the second heat exchange component 11.

[0041] Furthermore, a water supply component is provided between the second heat exchange component 11 and the container 14. The bottom of the container 14 is sealed with the water supply component. The replenishment water of the water supply component can enter the soil through the bottom of the container 14. After the replenishment water enters the soil, the replenishment water migrates from bottom to top under the action of the pressure gradient and temperature gradient, ensuring that there is sufficient moisture in the soil to support the growth of ice lenses and promoting the formation and development of ice lenses.

[0042] Furthermore, the water supply component includes a support seat 13, which is arranged on the second heat exchange component 11, and the cold energy of the second heat exchange component 11 acts on the bottom of the container 14 through the support seat 13; a cavity for accommodating water is formed in the support seat 13, and a water inlet and a water outlet connected to the accommodating cavity are provided on the support seat 13, and the water inlet and the water outlet are connected to an external water source. A through hole and an annular groove 131 are opened on the top of the support seat 13, and the through hole is located in the annular groove 131. The shape and size of the annular groove 131 are adapted to the shape and size of the bottom of the container 14. The bottom of the container 14 is inserted into the annular groove 131 so that the accommodating cavity and the container 14 are connected together.

[0043] Furthermore, a permeable stone 143 is installed on the lower side of the interior of the container 14, and the moisture in the accommodating chamber can enter the container 14 through the permeable stone 143; when the container 14 loaded with saturated soil is inserted on the support seat 13, the permeable stone 143 can support the saturated soil in the container 14 to prevent the saturated soil from flowing out from the bottom of the container 14. At the same time, the permeable stone 143 can help moisture enter the container 14 evenly, which is conducive to the uniform formation and growth of ice lenses.

[0044] Furthermore, an annular sealing ring is provided at the bottom of the annular groove 131 to achieve a sealed connection between the container 14 and the support base 13 and prevent water leakage at the connection between the container 14 and the support base 13.

[0045] Furthermore, a heater 12 is included. The heater 12 is arranged between the second heat exchange component 11 and the support base 13. The heater 12 is used to adjust the temperature difference between the two ends of the container 14 so that the temperature difference can be accurately controlled.

[0046] Furthermore, a stabilizing mechanism is included, which is used to stably place the container 14 on the support base 13 to improve the stability and sealing of the container 14.

[0047] Specifically, the stabilizing mechanism includes a plurality of nuts fixed on the mounting flange 151, and a plurality of tightening screws corresponding in number to the number of the nuts and threadedly connected to the mounting flange 151 through the nuts. The tightening screws are rotated so that the lower ends of the plurality of tightening screws rest against the top of the container 14. Under the action of the pressure provided by the plurality of tightening screws, the stability and sealing of the container 14 are improved.

[0048] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A saturated soil ice lens growth observation test device, characterized in that: The invention comprises a supporting component and a container for loading saturated soil arranged on the supporting component; a first heat exchange component is arranged on the upper side of the container, and a second heat exchange component is arranged on the lower side; a water supply component is arranged between the second heat exchange component and the container, and the replenished water of the water supply component can enter the saturated soil through the container; a pressure mechanism is located above the container, the pressure mechanism is connected to the first heat exchange component, and can drive the first heat exchange component to move axially in the container, thereby providing constant pressure for the saturated soil; the container is made of a transparent material to facilitate the observation of ice lens growth.

2. The saturated soil ice lens growth observation test device according to claim 1, characterized in that: The container is divided into a first half container and a second half container in a radial direction. The first half container and the second half container are detachably connected to facilitate loading and unloading of saturated soil.

3. The saturated soil ice lens growth observation test device according to claim 2, characterized in that: An observation area is provided on the surface of the container and is wrapped with thermal insulation material.

4. The saturated soil ice lens growth observation test device according to claim 1, characterized in that: The pressure-applying mechanism comprises a cylinder arranged on the supporting component, an output end of the cylinder is connected to the first heat exchange component, and the cylinder is connected to an external gas source pipeline.

5. The saturated soil ice lens growth observation test device according to claim 4, characterized in that: The pressure mechanism also includes a three-way joint and a pressure relief valve. One end of the three-way joint is connected to the cylinder input interface, and the other two ends are connected to the external air source and the pressure relief valve in a one-to-one correspondence.

6. The saturated soil ice lens growth observation test device according to any one of claims 1 to 5, characterized in that: The supporting component comprises a base and a supporting frame arranged on the base, a mounting flange is fixedly arranged on the upper part of the supporting frame, and the pressure structure is installed on the mounting flange.

7. The saturated soil ice lens growth observation test device according to claim 6, characterized in that: It also includes an adjustable support frame and a laser rangefinder arranged on the adjustable support frame. The adjustable support frame is arranged on a mounting flange. The adjustable support frame can move radially along the mounting flange of the container to adjust the radial position of the laser rangefinder in the container. A vertical mounting groove is provided on the adjustable support frame. The laser rangefinder can move up and down along the mounting groove to adjust its height.

8. The saturated soil ice lens growth observation test device according to claim 1, characterized in that: The temperature of the second heat exchange component is higher than that of the first heat exchange component, so as to form a stable temperature difference between the two ends of the container.

9. The saturated soil ice lens growth observation test device according to claim 8, characterized in that: The first heat exchange component and the second heat exchange component both have a liquid inlet and a liquid outlet. The liquid inlet of the first heat exchange component is connected to an external low-temperature medium source, and the liquid outlet of the first heat exchange component is connected to the liquid inlet of the second heat exchange component through a hose. After the low-temperature medium exchanges heat with the saturated soil, it enters the second heat exchange component through the liquid outlet and the hose of the first heat exchange component.

10. The saturated soil ice lens growth observation test device according to claim 9, characterized in that: A heater is also provided between the second heat exchanger and the container, and the heater can adjust the temperature difference between the two ends of the container.

Images