Undisturbed sample preparation device used after salinized soil corrosion

Abstract

The utility model provides a device for undisturbed sample preparation after salinized soil corrosion, which relates to the field of salinized soil mechanical test and comprises a fixing bolt, the fixing bolt sequentially penetrates through a water inlet fixing plate, a sample device and a water outlet fixing plate, a water inlet is arranged in the middle of the water inlet fixing plate and externally connected with a test water head, and a water outlet is arranged in the water outlet fixing plate. The sample device is filled with a sample, and a water outlet is formed in the middle of the water outlet fixing plate and controlled through a water outlet valve. According to the utility model, the undisturbed dynamic test on the sample can be effectively simulated after the saline soil is subjected to the seepage dissolution action of natural river water, and the integrity, authenticity and reliability of the sample are ensured.

Description

Technical Field

[0001] The utility model relates to the field of saline soil mechanics tests, in particular to a non-disturbance sample preparation device for saline soil after dissolution. Background Art

[0002] Saline soil is widely distributed in arid and semi-arid areas, and its special physical and chemical properties have a significant impact on the mechanical behavior of the soil. In engineering practice, accurate evaluation of the mechanical response of saline soil under river seepage is crucial to ensure engineering safety and environmental stability. However, traditional test methods often cannot guarantee the undisturbed state of the sample, resulting in deviations between the test results and the actual situation. Therefore, it is of great practical significance to develop a device that can perform undisturbed dynamic tests on saline soil samples under seepage conditions.

[0003] For example, the patent application with publication number CN113281236A in the prior art cannot ensure that the sample is in an undisturbed state, which leads to a deviation between the test results and the actual situation. Therefore, a device for preparing samples without disturbance after dissolution of saline soil is needed to solve the above technical problems. Utility Model Content

[0004] In view of this, the utility model provides a disturbance-free sample preparation device for saline soil after dissolution, which can effectively simulate the saline soil after the seepage dissolution of natural river water to conduct an undisturbed dynamics test on the sample.

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

[0006] A device for undisturbed sample preparation after dissolution of saline soil comprises a fixing bolt, which passes through a water inlet fixing plate, a sample device and a water outlet fixing plate in sequence. A water inlet is provided in the middle of the water inlet fixing plate, the water inlet is externally connected to a test water head and is controlled by a water inlet valve. The sample device is filled with a sample, and a water outlet is provided in the middle of the water outlet fixing plate, which is controlled by a water outlet valve.

[0007] Furthermore, four screw holes are evenly distributed around the water inlet fixing plate and the water outlet fixing plate, and the four screw holes are used for fixing with fixing bolts.

[0008] Furthermore, the sample device includes a ring knife and a filter plate, and a plurality of the filter plates are distributed in parallel along the vertical direction. The ring knife is installed on each filter plate, and the sample is filled in the ring knife.

[0009] Furthermore, a circle of small filter holes is provided in the middle of the filter plate, a circle of grooves is provided outside the small filter holes, and the blade of the ring knife is placed downward in the groove.

[0010] Furthermore, filter paper is laid on the top and bottom of the sample.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model has a simple design and is easy to operate. It can effectively simulate the undisturbed dynamic test of saline soil after the seepage and dissolution of natural river water, and can realize the simultaneous dissolution treatment of multiple samples. The samples after dissolution can be directly used for compression and direct shear tests, ensuring the undisturbance of the samples and significantly improving the test efficiency.

[0013] 2. After the dissolution is completed, the sample can be directly used for mechanical testing. During the entire test process, the sample remains undisturbed, which is closer to the actual engineering environment and ensures the integrity and authenticity of the sample. The test data obtained in this way has higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a top view of the filter plate;

[0017] Among them, in the figure:

[0018] 1-water inlet; 2-fixing bolt; 3-water inlet fixing plate; 4-ring knife; 5-filter plate; 6-sample; 7-water outlet fixing plate; 8-water outlet. DETAILED DESCRIPTION

[0019] 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.

[0020] Please see attached Figure 1The utility model provides a non-disturbance sample preparation device for saline soil after dissolution, including a fixing bolt 2, the fixing bolt 2 sequentially passes through a water inlet fixing plate 3, a sample device and a water outlet fixing plate 7, the fixing bolt 2 sequentially passes through three filter plates 5 from the water inlet fixing plate 3 to the water outlet fixing plate 7, and the water outlet fixing plate 7 is tightened with a nut to ensure one-dimensional seepage of water flow, a water inlet 1 is provided in the middle of the water inlet fixing plate 3, the water inlet 1 is externally connected to a test water head and is controlled by a water inlet valve, and the permeate of the water inlet 1 can be adjusted according to different situations Conditions are selected, and the seepage under different concentrations, different rates and water pressures can be simulated according to actual working conditions by controlling the water head height, the type of permeate and the temperature, so as to study the mechanical properties of saline soil under different seepage conditions. The sample device is filled with samples 6, and a water outlet 8 is provided in the middle of the water outlet fixing plate 7. The water outlet 8 is controlled by a water outlet valve. By collecting the leachate from the water outlet 8 and monitoring the conductivity of the leachate from the water outlet 8, the change of soil salinity can be understood, and then samples 6 with different salt contents can be selected for testing.

[0021] Preferably, four screw holes are evenly distributed around the water inlet fixing plate 3 and the water outlet fixing plate 7 , and the four screw holes are used for fixing with the fixing bolts 2 .

[0022] Preferably, the sample device includes a ring knife 4 and a filter plate 5, and a plurality of the filter plates 5 are distributed in parallel in the vertical direction. The ring knife 4 is installed on each of the filter plates 5, and the sample 6 is filled in the ring knife 4. Four screw holes are arranged around the filter plate 5 for fixing the device. The dissolution sample 6 under different salt contents is obtained according to the test requirements. The dissolved sample 6 can be directly used for compression and direct shear tests, ensuring that the sample 6 is undisturbed. This method ensures the integrity and authenticity of the sample 6, thereby more accurately reflecting the actual situation.

[0023] Please see attached Figure 2 A circle of small filter holes with a diameter of 2 mm is provided in the middle of the filter plate 5, and a circle of grooves with a width of 1 mm and a depth of 0.5 mm is provided on the outside of the small filter holes to prevent water from overflowing from the sides, and the blade of the ring knife 4 is placed downward in the groove.

[0024] Preferably, filter paper is laid on the top and bottom of the sample 6 to prevent fine particles from being carried away.

[0025] The specific operation method of the utility model is:

[0026] First, assemble them in the order of water inlet fixing plate 3-sample device-water outlet fixing plate 7, place the blade of the ring knife 4 downward in the small groove, use the fixing bolt 2 to pass through the three filter plates 5 from the water inlet fixing plate 3 to the water outlet fixing plate 7 in sequence, and tighten the water outlet fixing plate 7 with a nut to ensure one-dimensional seepage of water.

[0027] Secondly, the water inlet 1 of the upper water inlet fixing plate 3 is externally connected to the test water head and the water inlet speed and flow rate are controlled by the water inlet valve. After the water passes through the sample 6 and the filter paper, it flows into the water outlet 8 of the lower water outlet fixing plate 7 through the small filter holes of the filter plate 5, and the water outlet speed and flow rate are controlled by the water outlet valve. The effluent from the water outlet 8 is collected and its conductivity is measured.

[0028] Finally, when the effluent from the water outlet 8 meets the test requirements, close the water inlet and outlet valves, loosen the nuts, remove the bolts, and gently remove the sample 6 that has been treated with corrosion. This sample 6 will be directly used in the subsequent compression and direct shear tests to accurately determine the mechanical properties of the sample 6 after the corrosion process.

[0029] The utility model discloses a non-disturbance sample preparation device for saline soil after dissolution, which can effectively simulate the seepage process under natural conditions and perform non-disturbance dynamic performance test on the sample under the seepage conditions, and has important value for research and application in related fields.

[0030] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for undisturbed sample preparation after saline soil dissolution, characterized in that: The invention comprises a fixing bolt (2), wherein the fixing bolt (2) passes through a water inlet fixing plate (3), a sample device and a water outlet fixing plate (7) in sequence, wherein a water inlet (1) is provided in the middle of the water inlet fixing plate (3), wherein the water inlet (1) is externally connected to a test water head and is controlled by a water inlet valve, wherein the sample device is filled with a sample (6), wherein a water outlet (8) is provided in the middle of the water outlet fixing plate (7), and wherein the water outlet (8) is controlled by a water outlet valve.

2. The device for undisturbed sample preparation after saline soil dissolution according to claim 1 is characterized in that: Four screw holes are evenly distributed around the water inlet fixing plate (3) and the water outlet fixing plate (7), and the four screw holes are used for fixing with fixing bolts (2).

3. The device for undisturbed sample preparation after saline soil dissolution according to claim 1 is characterized in that: The sample device comprises a ring knife (4) and a filter plate (5), wherein a plurality of filter plates (5) are distributed in parallel along a vertical direction, each filter plate (5) is mounted with the ring knife (4), and the sample (6) is filled in the ring knife (4).

4. The device for undisturbed sample preparation after saline soil dissolution according to claim 3 is characterized in that: The filter plate (5) has a circle of small filter holes in the middle, and a circle of grooves is provided outside the small filter holes. The blade of the ring knife (4) is placed downward in the groove.

5. The device for undisturbed sample preparation after saline soil dissolution according to claim 1 is characterized in that: Filter paper is laid on the top and bottom of the sample (6).

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