Salinized soil frost heaving property detection device

Abstract

The utility model discloses a saline soil frost heaving property detection device which comprises a detection box body and a saline soil sample, a detection placing table is installed on the inner wall of the bottom side of the detection box body, the saline soil sample is placed on the detection placing table, a heat preservation assembly is arranged on the detection box body, and a shooting comparison detection assembly is arranged on the inner wall of the detection box body. According to the saline soil frost heaving property detection device, the saline soil sample is placed on the detection placement table, irradiation is conducted through a first infrared irradiation lamp and a second infrared irradiation lamp on the shooting comparison detection assembly, and shooting and recording are conducted on the two sides; then cold air is conveyed into the detection box body through the cold air inlet pipe, the expansion change of the salinized soil sample at a specific temperature is simulated, after a period of experiment, the detection assembly is shot and compared again, the record is observed and compared with the previous record, and a detection result is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of salt swelling detection of saline soil, in particular to a device for detecting frost swelling of saline soil. Background Art

[0002] Saline soil is widely distributed in the western inland of my country and the Yellow Sea and Bohai Sea in the east. Because saline soil contains a certain amount of soluble salt, it is easy to produce various engineering diseases such as salt swelling, slurrying, and corrosion under certain conditions. Taking sulfate saline soil as an example, when the temperature drops or water is lost, sodium sulfate will precipitate from its liquid phase to form mirabilite crystals, and the volume will increase to 3.1 times that of anhydrous sodium sulfate, which will cause the soil to swell and bulge, resulting in loose soil structure and reduced strength. Salt swelling phenomena. When the soil temperature drops to a certain level, ice crystals will precipitate, causing the total volume of the liquid phase to expand by 9%, which is called frost heave. The solubility of electrolytes decreases with decreasing temperature. At the same time, the loss of liquid water caused by frost heave will increase the electrolyte concentration of the pore solution of the soil-water system, further promoting the occurrence of salt swelling. The frost heave and salt swelling of saline soil are more sensitive to temperature changes. The uneven deformation caused by frost heave, salt swelling, thaw settlement, etc. seriously affects the normal construction, operation and maintenance of engineering structures.

[0003] To solve the hazards of salt expansion and frost expansion of saline soil, we should first start from the mechanism of salt expansion and frost expansion, and distinguish the amount of salt expansion and frost expansion of saline soil under the action of temperature. The observation method of the total expansion of saline soil mainly comes from the indoor test of salt expansion of saline soil. In the process of the experiment, the expansion size of saline soil is observed manually. It is believed that the determination of the total expansion by visual observation is easily affected by reading errors, has poor accuracy, and cannot obtain continuous readings. For this reason, a saline soil frost expansion detection device is described. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a saline soil frost heaving detection device for solving the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for detecting frost heaving of saline soil comprises a detection box and a saline soil sample, wherein a detection placement table is installed on the inner wall of the bottom side of the detection box, and the saline soil sample is placed on the detection placement table, an insulation component is provided on the detection box, and a shooting comparison detection component is provided on the inner wall of the detection box, and the shooting comparison detection component is adapted to the saline soil sample, a control panel and a recording board are installed on one side of the detection box, and a sealing cover is installed on the detection box via a sealing connection component.

[0007] Preferably, the shooting comparison detection component includes a first infrared lamp and a second infrared lamp fixedly mounted on the inner wall of the detection box, and the first infrared lamp and the second infrared lamp are respectively located on both sides of the first infrared lamp and the second infrared lamp, and a first camera and a second camera are installed on the inner wall of the detection box, and the first camera and the second camera are respectively located on one side of the first infrared lamp and the second infrared lamp.

[0008] Preferably, a first change control line and a second change control line are provided on the inner wall of the detection box, and the first change control line and the second change control line are respectively located at opposite positions of the first infrared irradiation lamp and the second infrared irradiation lamp.

[0009] Preferably, the heat preservation component comprises a heat preservation cavity arranged on the detection box body, and a heat preservation plate is installed in the heat preservation cavity.

[0010] Preferably, a cold air inlet pipe and a hot air inlet pipe are installed on one side of the detection box, the cold air inlet pipe is located above the hot air inlet pipe, and sealing valves are provided on the cold air inlet pipe and the hot air inlet pipe.

[0011] Preferably, the sealing connection assembly comprises a bottom block fixedly mounted on one side of the detection box body, a connection block is fixedly mounted on one side of the sealing cover, and the bottom block is provided with connection bolts which penetrate the connection block.

[0012] Preferably, a sealing groove is provided on the top side of the detection box body, and a sealing gasket is fixedly installed on the bottom side of the sealing cover. The sealing gasket is arranged in a frame-shaped structure and is located in the sealing groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the saline soil frost heaving property detection device places the saline soil sample on the detection placement table, covers the sealing cover, and the interior of the detection box is in a dark state. The first infrared irradiation lamp and the second infrared irradiation lamp on the shooting comparison detection component are respectively irradiated, and the two sides are recorded. The initial state of the saline soil sample is photographed from two directions for change comparison, and then cold air is transported into the detection box through the cold air inlet pipe to simulate the expansion change of the saline soil sample at a specific temperature. After a period of experiment, the shooting comparison detection component is used again. After observation and recording, it is compared with the previous record. The recorded shot will be more accurate than the intuitive observation with the naked eye, and the detection accuracy is higher.

[0014] After a set of experiments is completed, the saline soil sample is replaced, hot air is transported through the hot air inlet pipe, and the expansion test of the saline soil sample is tested by testing different temperatures. Through multiple sets of experimental tests, the expansion test results of the saline soil sample can be obtained. An insulation component is provided in the test box, and the insulation plate on the insulation component can prevent the cold air or hot air transported in from dissipating quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a left-side perspective structural diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model from the right side;

[0017] Figure 3 It is a schematic diagram of the structure of the vertical section of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the side section of the utility model;

[0019] Figure 5 For this utility model Figure 3 Schematic diagram of the structure of part A.

[0020] In the figure: 1. detection box; 2. detection placement table; 3. saline soil sample; 4. sealing cover; 5. insulation chamber; 6. insulation board; 7. first infrared irradiation lamp; 8. first camera; 9. first change comparison line; 10. second infrared irradiation lamp; 11. second camera; 12. second change comparison line; 13. control panel; 14. recording board; 15. cold air inlet pipe; 16. hot air inlet pipe; 17. sealing valve; 18. sealing groove; 19. sealing gasket; 20. bottom block; 21. connecting block; 22. connecting bolts. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example: Refer to Figure 1-5A saline soil frost heaving detection device comprises a detection box 1 and a saline soil sample 3, a detection placement table 2 is installed on the inner wall of the bottom side of the detection box 1, and the saline soil sample 3 is placed on the detection placement table 2, a heat preservation component is provided on the detection box 1, and a shooting comparison detection component is provided on the inner wall of the detection box 1, and the shooting comparison detection component is adapted to the saline soil sample 3, a control panel 13 and a recording board 14 are installed on one side of the detection box 1, and the shooting comparison detection component comprises a first infrared irradiation lamp 7 and a second infrared irradiation lamp 10 fixedly installed on the inner wall of the detection box 1, and the first infrared irradiation lamp 7 and the second infrared irradiation lamp 10 are respectively located on both sides of the first infrared irradiation lamp 7 and the second infrared irradiation lamp 10, and a first camera 8 and a second camera 11 are installed on the inner wall of the detection box 1, and the first camera 8 and the second camera 11 are respectively located on one side of the first infrared irradiation lamp 7 and the second infrared irradiation lamp 10. A first change control line 9 and a second change control line 12 are provided on the inner wall of the detection box 1. The first change control line 9 and the second change control line 12 are respectively located at opposite positions of the first infrared irradiation lamp 7 and the second infrared irradiation lamp 10. The interior of the detection box 1 is in a dark state. At this time, the first infrared irradiation lamp 7 on the shooting comparison detection component is turned on. Through the single-point irradiation light, the shadow of the saline soil sample 3 will remain on the corresponding inner wall, and the height on the first change control line 9 is observed. At this time, the first camera 8 is used to shoot, and the photographed photos are transmitted to the control panel 13 for storage, or recorded on the recording board 14. After the shooting is completed, the first infrared irradiation lamp 7 is turned off, and the second infrared irradiation lamp 10 is turned on at the same time. The shadow position on the second change control line 12 is observed, and the second camera 11 is used to shoot. The initial state of the saline soil sample 3 is shot from two directions for change comparison.

[0023] Specifically, a cold air inlet pipe 15 and a hot air inlet pipe 16 are installed on one side of the detection box 1. The cold air inlet pipe 15 is located above the hot air inlet pipe 16. The cold air inlet pipe 15 and the hot air inlet pipe 16 are both provided with a sealing valve 17. The cold air is transported into the detection box 1 through the cold air inlet pipe 15. The transported cold air will be transported downward. After the cold air is transported, the expansion change of the saline soil sample 3 at a specific temperature will be simulated. After a period of experiment, the first infrared irradiation lamp 7 is turned on again for irradiation, and the shadow after irradiation is photographed. After observation and recording, it is compared with the previous The same operation method is used to compare the shadow illuminated by the second infrared lamp 10 with the previous record. The recorded image will be much more accurate than the visual observation with the naked eye, and the detection accuracy is relatively high. A heat preservation component is provided in the detection box 1. After a set of experiments is completed, the saline soil sample 3 is replaced, and hot air is transported through the hot air inlet pipe 16. The expansion experiment of the saline soil sample 3 is carried out by testing different temperatures. Through multiple sets of experimental tests, the expansion test results of the saline soil sample 3 can be obtained.

[0024] Specifically, a sealing cover 4 is installed on the detection box body 1 through a sealing connection assembly, and the sealing connection assembly includes a bottom block 20 fixedly installed on one side of the detection box body 1, and a connecting block 21 is fixedly installed on one side of the sealing cover 4. A connecting bolt 22 is provided on the bottom block 20, and the connecting bolt 22 passes through the connecting block 21. A sealing groove 18 is opened on the top side of the detection box body 1, and a sealing gasket 19 is fixedly installed on the bottom side of the sealing cover 4. The sealing gasket 19 is arranged in a frame-shaped structure and is located in the sealing groove 18. The sealing gasket 19 on the sealing connection assembly can effectively increase the sealing between the sealing cover 4 and the detection box body 1, and the arranged connecting bolt 22 can fix the sealing cover 4 on the detection box body 1.

[0025] Specifically, the insulation component includes an insulation cavity 5 arranged on the detection box 1, and an insulation board 6 is installed in the insulation cavity 5. The insulation board 6 on the insulation component can prevent the cold air or hot air from being transported in and quickly dissipate, and a sealed connection component is set.

[0026] During use: when the saline soil sample 3 is tested for expansion, the saline soil sample 3 is placed on the test placement table 2. After placement, the sealing cover 4 is covered. At this time, the interior of the test box 1 is in a dark state. At this time, the first infrared irradiation lamp 7 on the shooting comparison detection component is turned on. Through the single-point irradiation light, the shadow of the saline soil sample 3 will remain on the corresponding inner wall, and the height on the first change comparison line 9 is observed. At this time, the first camera 8 is used to shoot, and the photographed photos are transmitted to the control panel 13 for storage, or recorded on the recording board 14. After the shooting is completed, the first infrared irradiation lamp 7 is turned off, and the second infrared irradiation lamp 10 is turned on at the same time. The shadow position on the second change comparison line 12 is observed, and the second camera 11 is used to shoot. The initial state of the saline soil sample 3 is photographed from two directions for change comparison, and then cold air is transported into the test box 1 through the cold air inlet pipe 15. The transported cold air will be transported downward. After the cold air is transported, it will simulate the expansion of the saline soil sample 3 at a specific temperature. Changes, after a period of experiment, turn on the first infrared lamp 7 again for irradiation, take a picture of the shadow after irradiation, observe and record, and compare it with the previous record. The same operation method is used to irradiate the shadow of the second infrared lamp 10, and compare it with the previous record. The record obtained by taking the picture will be much more accurate than the intuitive observation with the naked eye, and the detection accuracy is high. After a group of experiments, the saline soil sample 3 is replaced, and hot air is transported through the hot air inlet pipe 16. Through experiments with different temperatures, the expansion experiment of the saline soil sample 3 is tested. Through multiple groups of experimental tests, the expansion test results of the saline soil sample 3 can be obtained. An insulation component is provided in the detection box 1. The insulation plate 6 on the insulation component can prevent the cold air or hot air transported in from being quickly dissipated. The sealing connection component and the sealing gasket 19 on the sealing connection component can effectively increase the sealing between the sealing cover 4 and the detection box 1. The connecting bolts 22 provided can fix the sealing cover 4 on the detection box 1, which is easy to use.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A saline soil frost heaving detection device, comprising a detection box (1) and a saline soil sample (3), characterized in that: A detection placement table (2) is installed on the inner wall of the bottom side of the detection box (1), and the saline soil sample (3) is placed on the detection placement table (2). The detection box (1) is provided with a heat preservation component, and a shooting comparison detection component is provided on the inner wall of the detection box (1), and the shooting comparison detection component is compatible with the saline soil sample (3). A control panel (13) and a recording board (14) are installed on one side of the detection box (1), and a sealing cover (4) is installed on the detection box (1) through a sealing connection component.

2. A saline soil frost heaving detection device according to claim 1, characterized in that: The shooting comparison detection component comprises a first infrared irradiation lamp (7) and a second infrared irradiation lamp (10) fixedly mounted on the inner wall of the detection box (1); the first infrared irradiation lamp (7) and the second infrared irradiation lamp (10) are respectively located on both sides of the first infrared irradiation lamp (7) and the second infrared irradiation lamp (10); a first camera (8) and a second camera (11) are mounted on the inner wall of the detection box (1); the first camera (8) and the second camera (11) are respectively located on one side of the first infrared irradiation lamp (7) and the second infrared irradiation lamp (10).

3. A saline soil frost heaving detection device according to claim 2, characterized in that: A first change control line (9) and a second change control line (12) are provided on the inner wall of the detection box (1); the first change control line (9) and the second change control line (12) are respectively located at positions opposite to the first infrared irradiation lamp (7) and the second infrared irradiation lamp (10).

4. The device for detecting frost heaving of saline soil according to claim 1, characterized in that: The heat preservation component comprises a heat preservation cavity (5) arranged on the detection box (1), and a heat preservation plate (6) is installed in the heat preservation cavity (5).

5. The device for detecting frost heaving of saline soil according to claim 1, characterized in that: A cold air inlet pipe (15) and a hot air inlet pipe (16) are installed on one side of the detection box (1), the cold air inlet pipe (15) is located above the hot air inlet pipe (16), and sealing valves (17) are provided on the cold air inlet pipe (15) and the hot air inlet pipe (16).

6. The device for detecting frost heaving of saline soil according to claim 1, characterized in that: The sealing connection assembly comprises a bottom block (20) fixedly mounted on one side of the detection box (1), a connection block (21) fixedly mounted on one side of the sealing cover (4), a connection bolt (22) being provided on the bottom block (20), and the connection bolt (22) passing through the connection block (21).

7. A saline soil frost heaving detection device according to claim 6, characterized in that: A sealing groove (18) is provided on the top side of the detection box body (1), and a sealing gasket (19) is fixedly installed on the bottom side of the sealing cover (4). The sealing gasket (19) is arranged in a frame-shaped structure and is located in the sealing groove (18).

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