Confining pressure controllable salinized soil melt sinking measuring device

Abstract

The utility model relates to the technical field of soil detection, and discloses a confining pressure controllable saline soil melt sinking measuring device which comprises a test bed, a sample container for placing a sample, a pressurizing device for pressurizing the sample and a humidifying device for humidifying the sample, an elastic coating body for adjusting the confining pressure of the sample is arranged in the sample container, a cavity for storing a medium is arranged in the elastic coating body, and an adjusting device which is communicated with the cavity of the elastic coating body and is used for controlling the medium is arranged outside the sample container. According to the saline soil melt sinking measuring device with the controllable confining pressure, by arranging the elastic coating body, dynamic detection of detected saline soil can be achieved. By controlling the pressure around the tested salinized soil, the test data is more accurate, and help is provided for further solving the salinized soil corrosion phenomenon in engineering construction.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection, in particular to a saline soil dissolution measurement device with controllable confining pressure. Background Art

[0002] Saline soil refers to saline-alkali soil with a soluble salt content greater than or equal to 0.3%, which has adverse engineering properties such as corrosion, salt swelling, and dissolution.

[0003] At present, the research on the harm caused by saline soil mainly focuses on the frost heave and salt expansion damage of saline soil under the influence of temperature, while the research on the dissolution deformation of saline soil is relatively small. The dissolution of saline soil is also a major damage to engineering projects. When saline soil meets water, the salt will dissolve, which will significantly reduce the strength of the soil and produce certain dissolution phenomena, causing unpredictable damage to engineering construction. Therefore, it is necessary to study the dissolution deformation characteristics of saline soil, which is of great significance for preventing dissolution damage in saline soil areas in the future.

[0004] The existing highway geotechnical test regulations use conventional consolidation instruments for the dissolution and subsidence test of saline soil, while the confining pressure of the soil under actual engineering conditions is in a dynamically variable process. However, the conventional consolidation instrument does not take into account the influence of the pressure around the soil, and there is a certain error between this measurement method and the actual dissolution and subsidence deformation of saline soil. In addition, when there is rainfall infiltration and groundwater rise, the saline soil is in an unsaturated state, and the conventional consolidation instrument cannot measure the dissolution and subsidence deformation of the saline soil well during the gradual wetting process. Utility Model Content

[0005] The utility model aims to provide a saline soil dissolution measurement device with controllable confining pressure, so as to solve the problems raised in the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is: a saline soil dissolution measurement device with controllable confining pressure, including a test bench, a sample container for placing a sample, a pressurizing device for pressurizing the sample, and a humidifying device for humidifying the sample;

[0007] The sample container is provided with an elastic covering body for adjusting the confining pressure of the sample, the elastic covering body is provided with a cavity for storing the medium, and the sample container is provided with a regulating device connected with the cavity of the elastic covering body for controlling the medium.

[0008] Preferably, the elastic covering body is embedded in the sample container, has a ring-shaped cross section, and has an outer wall that fits the inner wall of the sample container.

[0009] Preferably, the regulating device comprises a medium container, the medium container is provided with a medium input port and a medium output port, the medium output port is connected with the cavity of the elastic sheathing body through a medium pipe, and the medium container is provided with an regulating handle for regulating the conveying medium to enter the cavity of the elastic sheathing body.

[0010] Preferably, a pressure gauge is provided in series between the medium container and the medium pipe body.

[0011] Preferably, the pressurizing device comprises a bracket, a displacement sensor is provided on the bracket, a sample cover is provided at the bottom of the displacement sensor and is located on the sample container for squeezing the sample, and a loading sheet is provided on the sample cover which can increase weight to form downward pressure.

[0012] Preferably, the humidifying device comprises a humidifying pipe extending into the top position of the sample container, and a water tank and a control valve thereof for adding water to the humidifying pipe.

[0013] Preferably, a water-permeable layer is provided at the bottom and the top of the sample container, a drainage pipe is provided at the bottom of the water-permeable layer, and the drainage pipe is connected to the capacity cylinder.

[0014] Preferably, the permeable layer at the bottom of the sample container is permeable stone.

[0015] The beneficial effects of the utility model are concentrated in that the confining pressure controllable saline soil dissolution measurement device can realize dynamic detection of the saline soil to be measured by setting an elastic coating body. By controlling the pressure around the saline soil to be measured, the test data is made more accurate, which provides help for further solving the saline soil dissolution phenomenon in engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 This is a schematic diagram of the interior of the container of the utility model;

[0018] Among them, 1. test bench; 2. sample container; 3. pressurizing device; 4. humidifying device; 5. elastic covering body; 6. cavity; 7. adjusting device; 8. medium container; 9. medium input port; 10. medium output port; 11. medium pipeline; 12. adjusting handle; 13. pressure gauge; 14. bracket; 15. displacement sensor; 16. sample cover; 17. loading sheet; 18. humidifying pipeline; 19. water tank; 20. control valve; 21. permeable layer; 22. drain pipe; 23. capacity cylinder. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application.

[0020] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0023] Embodiment 1

[0024] See also Figure 1-Figure 2 The invention discloses a saline soil dissolution measurement device with controllable confining pressure, which can be used in the fields of civil engineering, geological engineering, environmental science, etc., especially in the engineering projects related to saline soil, such as the survey, design and construction of roads, bridges, building foundations, water conservancy projects, etc.

[0025] In this embodiment, a test bench 1, a sample container 2 for placing a sample, a pressurizing device 3 for pressurizing the sample, and a humidifying device 4 for humidifying the sample are included. The sample container 2, the pressurizing device 3, and the humidifying device 4 are arranged on the test bench 1, and the test bench 1 is fixed on the ground. This scheme can simulate the actual situation of saline soil during immersion in water through the aforementioned devices, measure its dissolution deformation, and thus evaluate the engineering properties of saline soil. This allows researchers and engineers to better understand the dissolution characteristics of saline soil, provide a scientific basis for the design and construction of related projects, and ensure the safety and stability of the project.

[0026] Specifically, the sample container 2 is provided with an elastic covering body 5 for adjusting the confining pressure of the sample, the elastic covering body 5 is provided with a cavity 6 for storing the medium, and the sample container 2 is provided with a regulating device 7 connected to the cavity 6 of the elastic covering body 5 for controlling the medium. The medium can be water. The elastic covering body 5 can be made of elastic plastic material.

[0027] As a further solution of this embodiment, the elastic covering body 5 is embedded in the sample container 2, and its cross section can be annular, and its outer wall fits with the inner wall of the sample container 2, while the inner wall of the elastic covering body 5 contacts the sample.

[0028] As a further solution of this embodiment, the inner wall and the outer wall of the elastic coating 5 can also be a telescopic structure, and the separation or contraction of each other is achieved by the medium pressure in the cavity 6 for storing the medium. The side of the telescopic structure that contacts the sample is made of a non-elastic material. Compared with the elastic coating 5 of the annular structure, the advantage of the elastic coating 5 of the telescopic structure is that the deformation state of the elastic coating 5 is fixed, the pressure value of the confining pressure test is uniform, and it can be used for solid-state testing. However, due to the characteristics of its elastic material, the deformation state of the elastic coating 5 of the annular structure is not fixed, and the pressure value of the confining pressure test is also uneven, which can be used for dynamic testing. In this embodiment, the elastic coating 5 of the annular structure can be preferably used, which is more in line with the actual situation.

[0029] As a further solution of this embodiment, the cross section of the elastic covering body 5 of the telescopic structure is a fixed square ring structure, and a telescopic structure design is adopted between the inner wall and the outer wall of the elastic covering body 5, and a sealing gasket is provided for sealing. The elastic covering body 5 of the telescopic structure can be a telescopic body provided on one side of the inner wall of the elastic covering body 5 relative to the outer wall, and the telescopic body surrounds the inner wall of the elastic covering body 5 relative to the outer wall, and the inner wall of the elastic covering body 5 relative to the outer wall is provided with a telescopic body at the top and bottom. The outer wall of the elastic covering body 5 is provided with a base for inserting the telescopic body on one side relative to the inner wall. Thus, the outer wall and the inner wall of the elastic covering body 5 are connected by the telescopic body and the base, and are telescopic. In addition, an elastic sealing gasket that wraps the telescopic body and the base is provided between the outer wall and the inner wall of the elastic covering body 5, thereby forming a sealed cavity 6.

[0030] As a further solution of this embodiment, the regulating device 7 includes a medium container 8, and the medium container 8 is provided with a medium input port 9 and a medium output port 10. The medium output port 10 is connected to the cavity of the elastic covering body 5 through a medium pipe 11, and the medium container 8 is provided with an regulating handle 12 for regulating the delivery of the medium into the cavity 6 of the elastic covering body 5. During implementation, the medium in the medium container 8 can be squeezed toward the medium output port 10 by the regulating handle 12. Specifically, the regulating handle 12 can be rotatably connected to the bracket, and a connecting rod extending into the medium container 8 is rotatably connected at its end, and a medium push plate is provided at the bottom of the connecting rod. By pressing the handle end of the regulating handle 12, the medium push plate is moved up, the medium is squeezed out of the medium output port 10, and flows into the elastic covering body 5 through the medium pipe 11, so as to form a regulation of the sample confining pressure.

[0031] As a further solution of this embodiment, a pressure gauge 13 is connected in series between the medium container 8 and the medium pipe body to observe and adjust the pressure.

[0032] As a further solution of this embodiment, the pressurizing device 3 includes a bracket 14, on which a displacement sensor 15 is provided, and at the bottom of the displacement sensor 15, a sample cover 16 is provided on the sample container 2 for squeezing the sample, and a loading sheet 17 is provided on the sample cover 16 to increase the weight to form a downward pressure. During large-capacity testing, the loading sheet 17 can be driven by a pushing device to move up and down to form a loading force, and the pushing device can be driven by the piston rod body of an electric telescopic rod. The loading sheet 17 is a disc structure, which is used to increase the contact area so that the pushing device can form a more stable downward pressure on the sample cover 16. A pressure sensor is provided between the loading sheet 17 and the sample cover 16 to detect the pressure on the sample. The loading sheet 17 and the sample cover 16 can be arranged concave and convex to form a position limit to prevent the problem of slipping when under pressure.

[0033] As a further solution of this embodiment, the humidifying device 4 includes a humidifying pipe 18 extending into the top position of the sample container 2, and a water tank 19 for adding water to the humidifying pipe 18 and a control valve 20. The control valve 20 controls the amount of water entering the sample container 2.

[0034] As a further solution of this embodiment, the bottom and top of the sample container 2 are both provided with a water-permeable layer 21, through which water can penetrate, and the bottom of the water-permeable layer 21 is provided with a drainage pipe 22, which is connected to the capacity cylinder 23 to collect the permeated water. Graduation lines are provided on the water tank 19 and the capacity cylinder 23 for observing the inflow and outflow of water.

[0035] As a further solution of this embodiment, the water-permeable layer 21 at the bottom of the sample container 2 is a water-permeable stone. The water-permeable stone can be composed of a plurality of small stones, and gaps are left between the small stones for water to penetrate.

[0036] The saline soil dissolution measurement device dilutes and dissolves the saline soil by placing the saline soil into a sample container 2, opening the control valve 20 and controlling the amount of water entering the sample container 2. During the dissolution measurement, the pushing device drives the loading plate 17 to pressurize the saline soil, and then presses the handle end of the adjustment handle 12 to move the medium push plate upward, squeeze the medium out of the medium outlet 10, and flow into the elastic sheath 5 through the medium pipe 11, thereby regulating the confining pressure of the saline soil. Finally, the displacement is fed back through the displacement sensor 15, and the pressure value is fed back through the pressure gauge 13 and the pressure sensor, thereby forming a measurement value related to the dissolution of the saline soil.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A saline soil dissolution measurement device with controllable confining pressure, comprising a test bench, a sample container for placing a sample, a pressurizing device for pressurizing the sample, and a humidifying device for humidifying the sample; It is characterized in that The sample container is provided with an elastic covering body for adjusting the confining pressure of the sample, the elastic covering body is provided with a cavity for storing the medium, and the sample container is provided with a regulating device connected with the cavity of the elastic covering body for controlling the medium.

2. The device for measuring saline soil dissolution with controllable confining pressure according to claim 1, characterized in that: The elastic covering body is embedded in the sample container, has a ring-shaped cross section, and its outer wall is in contact with the inner wall of the sample container.

3. The device for measuring saline soil dissolution with controllable confining pressure according to claim 1, characterized in that: The regulating device comprises a medium container, which is provided with a medium input port and a medium output port, the medium output port is connected with the cavity of the elastic sheath through a medium pipeline, and the medium container is provided with an regulating handle for regulating the conveying medium to enter the cavity of the elastic sheath.

4. The device for measuring saline soil dissolution with controllable confining pressure according to claim 3, characterized in that: A pressure gauge is connected in series between the medium container and the medium pipe body.

5. The device for measuring saline soil dissolution with controllable confining pressure according to claim 1, characterized in that: The pressurizing device comprises a bracket, a displacement sensor is arranged on the bracket, a sample cover is arranged on the sample container at the bottom for squeezing the sample, and a loading sheet which can increase the weight to form downward pressure is arranged on the sample cover.

6. The device for measuring saline soil dissolution with controllable confining pressure according to claim 1, characterized in that: The humidifying device comprises a humidifying pipe extending into the top position of the sample container, a water tank for adding water to the humidifying pipe and a control valve thereof.

7. The device for measuring saline soil dissolution with controllable confining pressure according to claim 6, characterized in that: The bottom and the top of the sample container are both provided with a water-permeable layer, the bottom of the water-permeable layer is provided with a drainage pipe, and the drainage pipe is connected to the capacity cylinder.

8. The device for measuring saline soil dissolution with controllable confining pressure according to claim 7, characterized in that: The water-permeable layer at the bottom of the sample container is water-permeable stone.

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