Testing device for testing frost heaving pressure of soil sample at different temperatures

Abstract

The utility model relates to the technical field of frost heaving soil testing devices, in particular to a testing device for testing frost heaving pressure of a soil sample at different temperatures. The test device comprises a refrigeration constant-temperature box, and a storage table, a plurality of soil sample containing boxes and a pressure detection mechanism which are arranged in the refrigeration constant-temperature box, the soil sample containing boxes are opened, and the openings are matched with cover bodies; the pressure detection mechanism comprises a lifting assembly and a plurality of pressure sensors, the upper end of the lifting assembly is fixed to the top of the refrigeration thermotank, the pressure sensors are arranged at the bottom end of the lifting assembly, and the containing box is placed on the storage table and located below the lifting assembly. According to the utility model, the plurality of soil sample containing boxes and the corresponding pressure detection mechanisms are arranged in the refrigeration constant-temperature box, so that the frost heaving pressure of the plurality of soil samples at a preset temperature can be detected at the same time, and the frost heaving pressure of the soil samples at different temperatures can be detected by setting the temperature of the refrigeration constant-temperature box; the influence of different temperatures on the frost heaving of the soil sample can be conveniently analyzed.

Description

Technical Field

[0001] This utility model relates to the technical field of frost heave soil testing devices, and in particular to a testing device for testing the frost heave pressure of soil samples at different temperatures. Background Technology

[0002] For soil samples subject to freeze-thaw cycles, repeated frost heave and thaw settlement alter the soil's structure and particle bonding, leading to changes in permeability and consequently, changes in its mechanical properties. Since frozen soil is a four-phase system (gas, liquid, solid, and ice), its mechanical properties are influenced by multiple factors. Studying pressure changes during frost heave allows for a macroscopic and direct observation of the correlation and response patterns between water freezing within soil particles and frost heave pressure as temperature changes.

[0003] Current experimental setups for testing soil frost heave pressure are insufficient for macroscopic frost heave pressure testing of soil samples at different temperatures under the same test conditions. They are also insufficient for simultaneously detecting the frost heave pressure patterns of different soil samples or the same soil sample with different moisture contents at the same temperature. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings of the existing technology by proposing a test device for testing the frost heave pressure of soil samples at different temperatures.

[0005] This utility model discloses a test device for testing the frost heave pressure of soil samples at different temperatures. The device includes a refrigerated constant temperature chamber, a platform within the chamber, multiple soil sample containers, and a pressure detection mechanism. All soil sample containers are open, and each opening is fitted with a lid. The pressure detection mechanism includes a lifting assembly and multiple pressure sensors. The upper end of the lifting assembly is fixed to the top of the refrigerated constant temperature chamber, and the pressure sensors are located at the bottom of the lifting assembly. The containers are placed on the platform below the lifting assembly.

[0006] Furthermore, the platform is provided with multiple limiting grooves for placing soil sample containers, and the limiting grooves correspond one-to-one with the positions of the multiple pressure sensors.

[0007] Furthermore, the lifting assembly includes multiple electrically operated telescopic rods, and each of the electrically operated telescopic rods has a pressure sensor at its bottom end.

[0008] Furthermore, the lifting assembly includes an electric telescopic component and a lifting plate. The upper end of the electric telescopic component is fixed to the top of the refrigeration constant temperature chamber, and the lifting plate is disposed at the bottom end of the electric telescopic component. Multiple pressure sensors are spaced apart on the lifting plate.

[0009] Furthermore, the refrigeration constant temperature chamber is provided with a transparent insulated door on its side.

[0010] Furthermore, the refrigeration constant temperature chamber is equipped with a temperature display screen on its exterior.

[0011] Furthermore, the height of the soil sample container is greater than the depth of the limiting groove.

[0012] Furthermore, the plurality of the limiting grooves are on the same straight line.

[0013] This utility model discloses a test device for testing the frost heave pressure of soil samples at different temperatures. By setting multiple soil sample containers and corresponding pressure detection mechanisms in a refrigerated constant temperature chamber, it enables the simultaneous detection of the frost heave pressure of multiple soil samples at a preset temperature. Furthermore, by setting the temperature of the refrigerated constant temperature chamber, the frost heave pressure of soil samples at different temperatures can be detected, facilitating the analysis of the influence of different temperatures on the frost heave of soil samples. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a test device for testing the frost heave pressure of soil samples at different temperatures according to the present invention;

[0015] Figure 2 This is a schematic diagram of another embodiment of the present invention for testing the frost heave pressure of soil samples at different temperatures.

[0016] 1. Refrigeration and constant temperature chamber; 11. Transparent insulated door; 12. Temperature display screen; 2. Storage platform; 21. Limiting groove; 3. Soil sample container; 4. Pressure detection mechanism; 41. Lifting assembly; 411. Electric telescopic rod; 412. Electric telescopic component; 413. Lifting plate; 42. Pressure sensor; 5. Cover. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] Example 1

[0019] like Figure 1 As shown, this utility model discloses a test device for testing the frost heave pressure of soil samples at different temperatures. It includes a refrigeration constant temperature chamber 1, a platform 2 set inside the refrigeration constant temperature chamber 1, multiple soil sample containers 3, and a pressure detection mechanism 4. The soil sample containers 3 are all open and each of their openings is fitted with a cover 5. The pressure detection mechanism 4 includes a lifting assembly 41 and multiple pressure sensors 42. The upper end of the lifting assembly 41 is fixed to the top of the refrigeration constant temperature chamber 1, and the pressure sensors 42 are set at the bottom end of the lifting assembly 41. The containers are placed on the platform 2 and located below the lifting assembly 41.

[0020] This utility model discloses a test device for testing the frost heave pressure of soil samples at different temperatures. By setting multiple soil sample holding boxes 3 and corresponding pressure detection mechanisms 4 in a refrigeration constant temperature chamber 1, it can simultaneously detect the frost heave pressure of multiple soil samples at a preset temperature. Furthermore, by setting the temperature of the refrigeration constant temperature chamber 1, the frost heave pressure of soil samples at different temperatures can be detected, making it convenient to analyze the influence of different temperatures on the frost heave of soil samples.

[0021] Example 2

[0022] like Figure 1 As shown, the platform 2 can be provided with multiple limiting grooves 21 for placing soil sample containers 3. The limiting grooves 21 correspond one-to-one with the positions of multiple pressure sensors 42, which makes it convenient for users to accurately place the soil sample container 3 under the pressure sensor 42 for testing. The multiple limiting grooves 21 can be on the same straight line.

[0023] like Figure 1 As shown, the lifting assembly 41 has various structures, which are not limited here. In this embodiment, the lifting assembly 41 may include multiple electric telescopic rods 411, and each electric telescopic rod 411 is provided with a pressure sensor 42 at its bottom end. After the soil sample container 3 containing the soil sample to be tested is placed in the limiting groove 21 of the platform 2, the cover 5 is placed on the soil sample container 3 and in contact with the soil sample inside the soil sample container 3. The multiple electric telescopic rods 411 extend into the soil sample container 3, so that the pressure sensor 42 on them comes into contact with the cover 5.

[0024] The area of ​​the cover 5 can be larger than the open area of ​​the soil sample container 3. In this case, the soil sample must completely fill the soil sample container 3 so that the soil sample is in contact with the cover 5. In another feasible method, the cover 5 perfectly matches the open area of ​​the soil sample container 3. In this case, even if the soil sample does not completely fill the soil sample container 3, the cover can still be placed completely inside the soil sample container 3 to contact the soil sample. When the area of ​​the cover 5 can be larger than the open area of ​​the soil sample container 3, the height of the soil sample container 3 must be greater than the depth of the limiting groove 21.

[0025] Example 3

[0026] like Figure 2As shown, in another possible implementation, the lifting assembly 41 may include an electric telescopic member 412 and a lifting plate 413. The upper end of the electric telescopic member 412 is fixed to the top of the refrigeration constant temperature chamber 1, and the lifting plate 413 is disposed at the bottom end of the electric telescopic member 412. Multiple pressure sensors 42 are spaced apart on the lifting plate 413. After the soil sample container 3 containing the soil sample to be tested is placed in the limiting groove 21 of the platform 2, the cover 5 is placed on the soil sample container 3, and the multiple electric telescopic members 412 extend into the soil sample container 3, so that the pressure sensors 42 on the lifting plate 413 come into contact with the cover 5.

[0027] The side of the refrigeration constant temperature chamber 1 can be equipped with a transparent heat-insulating door 11 to facilitate observation of the internal test conditions.

[0028] The exterior of the refrigeration constant temperature chamber 1 can be equipped with a temperature display screen 12 to facilitate monitoring of the internal temperature of the refrigeration constant temperature chamber 1. The specific structure of the refrigeration constant temperature chamber 1 is similar to that of a refrigerator.

[0029] The height of the soil sample container 3 can be greater than the depth of the limiting groove 21, making it convenient to put in and take out the soil sample container 3.

[0030] For any points not covered above, existing technologies shall apply.

[0031] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the direction of the present invention or exceeding the scope defined by the appended claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing apparatus for testing the frost heave pressure of soil samples at different temperatures, characterized in that: The system includes a refrigeration constant temperature chamber (1), a platform (2) set inside the refrigeration constant temperature chamber (1), multiple soil sample containers (3), and a pressure detection mechanism (4); the soil sample containers (3) are all open and each of them is fitted with a cover (5); the pressure detection mechanism (4) includes a lifting assembly (41) and multiple pressure sensors (42), the upper end of the lifting assembly (41) is fixed to the top of the refrigeration constant temperature chamber (1), the pressure sensors (42) are set at the bottom end of the lifting assembly (41), and the soil sample containers (3) are placed on the platform (2) and located below the lifting assembly (41).

2. The test apparatus for testing the frost heave pressure of soil samples at different temperatures as described in claim 1, characterized in that: The platform (2) is provided with multiple limiting grooves (21) for placing soil sample containers (3), and the limiting grooves (21) correspond one-to-one with the positions of the multiple pressure sensors (42).

3. A test apparatus for testing the frost heave pressure of soil samples at different temperatures as described in claim 1 or 2, characterized in that: The lifting assembly (41) includes multiple electric telescopic rods (411), and each electric telescopic rod (411) has a pressure sensor (42) at its bottom end.

4. A test apparatus for testing the frost heave pressure of soil samples at different temperatures as described in claim 1 or 2, characterized in that: The lifting assembly (41) includes an electric telescopic component (412) and a lifting plate (413). The upper end of the electric telescopic component (412) is fixed to the top of the refrigeration constant temperature box (1), and the lifting plate (413) is disposed at the bottom end of the electric telescopic component (412). Multiple pressure sensors (42) are spaced apart on the lifting plate (413).

5. The test apparatus for testing the frost heave pressure of soil samples at different temperatures as described in claim 1, characterized in that: The side of the refrigeration constant temperature box (1) is provided with a transparent heat preservation door (11).

6. The test apparatus for testing the frost heave pressure of soil samples at different temperatures as described in claim 1, characterized in that: The outside of the refrigeration constant temperature box (1) is equipped with a temperature display screen (12).

7. The test apparatus for testing the frost heave pressure of soil samples at different temperatures as described in claim 2, characterized in that: The height of the soil sample container (3) is greater than the depth of the limiting groove (21).

8. The test apparatus for testing the frost heave pressure of soil samples at different temperatures as described in claim 7, characterized in that: The multiple limiting grooves (21) are on the same straight line.

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