Device for water-gas separation measurement in unsaturated soil consolidation process

Abstract

The utility model relates to a device for water-gas separation measurement in an unsaturated soil consolidation process. The device comprises a base, a pressure chamber and a vertical loading mechanism which are sequentially connected from bottom to top, the spiral line groove, the first three-way valve and the drainage measuring piece are communicated to form a drainage channel communicated with the soil sample containing space, and the first exhaust pipeline / second exhaust pipeline, the second three-way valve and the exhaust measuring piece are communicated to form an exhaust channel communicated with the soil sample containing space. The device has the beneficial effects that through the collaborative design of the base, the pressure chamber and the vertical loading mechanism, the spiral grooves of the upper and lower argil plates and the hydrophobic semi-permeable membrane exhaust pipelines are matched, water and gas discharged by consolidation of a soil sample are guided into the independent drainage and exhaust channels respectively, and the spiral grooves are combined with the water-permeable and air-impermeable characteristics of the argil plates to guide water to the drainage measuring piece; the hydrophobic semi-permeable membrane blocks moisture and only allows gas to enter the exhaust measuring piece through the exhaust pipeline, so that water-gas physical separation and synchronous accurate measurement are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to unsaturated soil consolidation test technical field especially, a device for water gas separation measurement in unsaturated soil consolidation process. BACKGROUND

[0002] Unsaturated soil is a multiphase medium that contains water and air in the soil pores, and its saturation is between 0% and 100%. Unlike saturated soil (pores are completely filled with water), unsaturated soil has unique physical and mechanical properties due to the presence of gas in the pores, such as matric suction (generated by air-liquid interfacial tension). There are very few truly saturated soils in nature, especially in arid or semi-arid regions, and unsaturated soils are widely distributed on the ground surface and directly affect engineering stability. Typical unsaturated soils include expansive soil, loess, and other special soil types, and their mechanical properties are crucial to engineering problems such as building planning and slope stability. The consolidation process of unsaturated soil refers to the dynamic process of soil compression and strength recovery under load through the discharge of pore water and gas and the adjustment of matric suction. During the consolidation process of unsaturated soil, the amount of water and gas discharged is an important indicator of the degree of soil consolidation.

[0003] In the prior art, the existing measuring device can directly or indirectly measure the amount of water and gas discharged simultaneously. Since the amount of gas discharged during the consolidation process of unsaturated soil may be extremely small, any step in the gas discharge process may cause gas to escape. Therefore, the existing measuring device often cannot accurately detect the amount of gas discharged, resulting in inaccurate measurement results.

[0004] Therefore, there is an urgent need for a device that can directly and simultaneously measure the amount of water and gas discharged during the consolidation process of unsaturated soil and accurately measure the amount of gas discharged. UTILITY MODEL CONTENT

[0005] (I) Technical problem to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a device for water gas separation measurement in the consolidation process of unsaturated soil, which solves the technical problems of the prior art that cannot directly measure the amount of water and gas discharged simultaneously and cannot accurately measure the amount of gas discharged.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purposes, the utility model adopts the main technical scheme comprising:

[0009] The utility model discloses an apparatus for water gas separation measurement in unsaturated soil consolidation process, including the base, pressure chamber and vertical loading mechanism that connect from below to above in proper order, vertical loading mechanism bottom is piston body, and piston body goes down and forms piston formula structure into pressure chamber, and is equipped with soil sample placing space between both, and piston body bottom is equipped with first earthenware soil board and first exhaust duct, and pressure chamber bottom is equipped with second earthenware soil board and second exhaust duct, and first earthenware soil board top and second earthenware soil board bottom are equipped with helical slot, and the depth of helical slot gradually reduces along the direction of one end import to the other end export, and the export of helical slot is communicated with one of external air source and exhaust measurement piece through a first three way valve, and the export of first exhaust duct and second exhaust duct is communicated with one of external gas source and exhaust measurement piece through a second three way valve, and helical slot, first three way valve and exhaust measurement piece form the drainage channel communicated with soil sample placing space, and first exhaust duct / second exhaust duct, second three way valve and exhaust measurement piece form the exhaust channel communicated with soil sample placing space.

[0010] Optionally, the connecting part of the piston body and the pressure chamber is provided with a double-layer sealing ring, which comprises a Y-shaped sealing ring in the inner layer and a guide ring in the outer layer.

[0011] Optionally, the pore size of the hydrophobic semi-permeable membrane is in the range of 0.1-0.3 μm, and the surface is grafted with a fluorocarbon chain modification layer.

[0012] Optionally, the external gas source is connected with the second three-way valve through a quick connector, and a one-way valve is further arranged between the second three-way valve and the exhaust measurement piece from the second three-way valve to the exhaust measurement piece, for controlling the gas discharge, and the inner wall of the external gas source is cladded with a dimethylsiloxane coating.

[0013] Optionally, a buffer cavity is further arranged between the first three-way valve and the exhaust measurement piece, which is in a cylindrical shape and connected with the pipeline between the first three-way valve and the exhaust measurement piece through a soft joint.

[0014] Optionally, the first earthenware soil board and the second earthenware soil board are integrally formed with the helical slot thereon, the cross section of the helical slot is semicircular, the pitch gradually increases from the center to the outside, the import of the helical slot is located at the center position of the first earthenware soil board and the second earthenware soil board, and the export of the helical slot is located at the edge position of the first earthenware soil board and the second earthenware soil board.

[0015] Optionally, a protective net is further arranged at the import of the first exhaust duct and the second exhaust duct, and the protective net is fixedly connected with the first exhaust duct and the second exhaust duct through a clamp.

[0016] Optionally, the vertical loading mechanism comprises a motor, a speed reducer and a shaft coupling arranged in sequence from top to bottom; the motor is connected with the speed reducer through a locking nut, the speed reducer is connected with the shaft coupling through a locking nut, and the shaft coupling is connected with the piston body through a ball screw.

[0017] Optionally, a bottom groove is formed at the center of the top end of the base, and an adapter block is fixedly arranged at the bottom end of the pressure chamber; the adapter block is matched with the groove, so that the pressure chamber and the vertical loading mechanism are kept concentric.

[0018] Optionally, an alignment groove is formed at the top end of the piston body, and the alignment groove is aligned with the bottom groove.

[0019] (Three) beneficial effects

[0020] The beneficial effects of the utility model are:

[0021] The utility model relates to a device for water gas separation measurement in the unsaturated soil consolidation process, which comprises a base, a pressure chamber and a vertical loading mechanism connected in sequence from bottom to top; the bottom of the vertical loading mechanism is a piston body, the piston body extends downward into the pressure chamber to form a piston structure, and a soil sample placing space is arranged between the piston body and the pressure chamber; a first clay plate and a first exhaust pipeline are arranged at the bottom of the piston body, a second clay plate and a second exhaust pipeline are arranged at the bottom of the pressure chamber, a spiral groove is arranged at the top of the first clay plate and the bottom of the second clay plate, the depth of the spiral groove gradually decreases along the direction from one end inlet to the other end outlet, the outlet of the spiral groove is selectively communicated with one of an external airless water source and a drainage measuring element through a first three-way valve, a hydrophobic semi-permeable membrane is arranged in the first exhaust pipeline and the second exhaust pipeline, and the outlet of the first exhaust pipeline / second exhaust pipeline is selectively communicated with one of an external air source and an exhaust measuring element through a second three-way valve, the spiral groove, the first three-way valve and the drainage measuring element form a drainage channel communicated with the soil sample placing space, and the first exhaust pipeline / second exhaust pipeline, the second three-way valve and the exhaust measuring element form an exhaust channel communicated with the soil sample placing space. Compared with the prior art, through the cooperative design of the base, the pressure chamber and the vertical loading mechanism, the piston structure is used to simulate the consolidation pressure, the spiral groove of the upper and lower clay plates and the hydrophobic semi-permeable membrane exhaust pipeline are matched, the water and gas discharged from the soil sample during consolidation are respectively introduced into independent drainage and exhaust channels, the spiral groove and the clay plate are combined to guide the water to the drainage measuring element according to the water-permeable and air-impermeable characteristics of the clay plate, the hydrophobic semi-permeable membrane blocks the water and only allows the gas to pass through the exhaust pipeline to enter the exhaust measuring element, the water and gas are physically separated and synchronously and accurately measured, the external airless water source and the external air source are flexibly switched through the three-way valve, the clay plate can be pretreated or the pore air pressure can be controlled, the two clay plates realize bidirectional drainage and exhaust, the consolidation time is shortened, the problems of large measurement error and inability to independently monitor in the traditional device are solved, an efficient and accurate testing tool is provided for the unsaturated soil mechanics characteristic research and engineering application, and the experimental data reliability and the device universality are remarkably improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the front view of the embodiment 1 of the device for water-gas separation measurement in the unsaturated soil consolidation process of the utility model;

[0023] Figure 2 It is Figure 1 It is the sectional view of the pressure chamber and the piston body in the device for water-gas separation measurement in the unsaturated soil consolidation process along the first exhaust pipeline and the first clay plate center connecting line direction;

[0024] Figure 3 It is Figure 1 It is the top view of the first clay plate in the device for water-gas separation measurement in the unsaturated soil consolidation process;

[0025] Figure 4 It is the side view of the first clay plate and the first three-way valve in the embodiment 2 of the device for water-gas separation measurement in the unsaturated soil consolidation process of the utility model;

[0026] Figure 5 It is Figure 4 It is the sectional view of the piston body in the device for water-gas separation measurement in the unsaturated soil consolidation process;

[0027] Figure 6 It is Figure 4 It is the structural schematic view of the device for water-gas separation measurement in the unsaturated soil consolidation process, wherein the structure shown is the first clay plate and the first exhaust pipeline bottom.

[0028]

Explanation of the drawing mark

[0029] 1: base;

[0030] 2: pressure chamber; 21: second clay plate; 22: second exhaust pipeline;

[0031] 3: vertical loading mechanism; 31: piston body; 311: first clay plate; 312: first exhaust pipeline;

[0032] 4: soil sample placement space;

[0033] 5: helical slot;

[0034] 6: first three-way valve;

[0035] 7: second three-way valve;

[0036] 8: Y-shaped sealing ring. DETAILED DESCRIPTION

[0037] In order to better explain the utility model, so as to facilitate understanding, the utility model is described in detail below by combining with the drawings through specific embodiments.

[0038] Embodiment 1:

[0039] With reference to Figures 1 to 3 The utility model provides a device for water gas separation measurement in unsaturated soil consolidation process for accurate measurement of drainage capacity and exhaust capacity in unsaturated soil consolidation process simultaneously, specifically, the device for water gas separation measurement in unsaturated soil consolidation process of the utility model includes the base 1, the pressure chamber 2 and the vertical loading mechanism 3 that connect in turn from below to above, as follows detailed.

[0040] The utility model discloses a piston body 31 at the bottom of vertical loading mechanism 3, and the piston body 31 forms piston formula structure into the pressure chamber 2 and is provided with soil sample placing space 4 between both. The first clay plate 311 and the first exhaust pipe 312 are equipped at the bottom of piston body 31, and the second clay plate 21 and the second exhaust pipe 22 are equipped at the bottom of pressure chamber 2, and the first clay plate 311 top and the second clay plate 21 bottom are equipped with helical slot 5, and the depth of helical slot 5 gradually reduces along the direction of one end import to the other end export, and the export of helical slot 5 is communicated with one of external air source and drainage measuring element through a first three-way valve 6, and the first exhaust pipe 312 and the second exhaust pipe 22 are all equipped with hydrophobic semi-permeable membrane, and the export of first exhaust pipe 312 and second exhaust pipe 22 is communicated with one of external air source and exhaust measuring element through a second three-way valve 7, and helical slot 5, first three-way valve 6 and drainage measuring element form drainage passage communicated with soil sample placing space 4, and first exhaust pipe 312 / second exhaust pipe 22, second three-way valve 7 and exhaust measuring element form exhaust passage communicated with soil sample placing space 4.

[0041] Specifically, unsaturated soil consolidation test is the process that pore water and pore gas gradually discharge, soil volume compresses under the action of external load, aims at revealing its deformation characteristic, consolidation law and water gas migration mechanism. In this process, the content value of pore water and pore gas is directly positively correlated with the accuracy of experimental result, therefore, it is particularly important to accurately measure the drainage capacity and exhaust capacity of unsaturated soil in unsaturated soil consolidation test. In the embodiment, pressure chamber 2 is fixed on the top of base 1 through multiple bolts, and vertical loading mechanism 3 is fixed on the top of base 1 through the use of counterforce frame, and vertical loading mechanism 3 is also located above pressure chamber 2, and vertical loading mechanism 3 is located at the center position of pressure chamber 2, providing vertical downward force for pressure chamber 2. The bottom of vertical loading mechanism 3 forms piston formula structure with pressure chamber 2, providing pressure for the soil sample placed in pressure chamber 2, and soil sample placing space 4 is between piston body 31 and pressure chamber 2, and soil sample placing space 4 abuts with piston body 31 and pressure chamber 2 respectively, and the gas and water in soil sample are discharged by vertical loading mechanism 3 downwardly pressing.

[0042] Moreover, the first and second clay plates 311 and 21 are saturated clay plates, which have the characteristics of water permeability and air impermeability, and the first and second clay plates 311 and 21 also clamp the soil sample from the top to bottom direction, so that the first and second clay plates 311 and 21 can only pass the water drained from the unsaturated soil. The first and second air exhaust pipes 312 and 22 are provided with hydrophobic semi-permeable membranes, which have the characteristics of air permeability and water impermeability, so that the first and second air exhaust pipes 312 and 22 can only pass the gas drained from the unsaturated soil. When the water source without gas is flushed, the residual gas in the drainage channel is flushed away in turn through the first three-way valve 6, the outlet of the spiral groove 5 and the inlet of the spiral groove 5, the spiral groove 5 can extend the water flow path of the unsaturated soil, separate the gas in the water, and greatly reduce the gas content of the water in the unsaturated soil. Moreover, the depth of the spiral groove 5 gradually decreases from the inlet to the outlet, and the water permeation speed from the clay plate is the same at different places, so that the water drained from the unsaturated soil first reaches the inlet of the spiral groove 5 after being drained from the first and second clay plates 311 and 21, and then gradually moves to the outlet after being accumulated at the inlet. The external gas source in the second three-way valve 7 can form a space with stable air pressure in the air exhaust channel, so that the air exhaust measuring element can measure the gas entering the air exhaust channel. The gas is drained from the soil sample along the first and second air exhaust pipes 312 and 22 to the second three-way valve 7 and then to the air exhaust measuring element. The water is drained from the soil sample along the first and second clay plates 311 and 21 to the spiral groove 5, and then flows to the drainage measuring element after flowing through the first three-way valve 6. The drainage measuring element is a high-precision electronic balance, and the air exhaust measuring element is an ultramicro gas flow meter.

[0043] In summary, through the collaborative design of the base 1, the pressure chamber 2 and the vertical loading mechanism 3, the consolidation pressure is simulated by using the piston structure, the spiral groove 5 of the upper and lower clay plates and the hydrophobic semi-permeable membrane air exhaust pipe are matched, the water and gas drained from the soil sample are respectively introduced into the independent drainage and air exhaust channels, the spiral groove 5 guides the water to the drainage measuring element in combination with the water permeability and air impermeability of the clay plate, the hydrophobic semi-permeable membrane allows only the gas to pass through the air exhaust pipe to enter the air exhaust measuring element, and the physical separation and synchronous accurate measurement of water and gas are realized. The external water source without gas and the external gas source are flexibly switched through the three-way valve, the clay plate can be pretreated or the pore air pressure can be controlled, the double clay plate bidirectional drainage and air exhaust shortens the consolidation time, solves the problems of large measurement error and inability to independently monitor in the traditional device, and provides an efficient and accurate testing tool for the research and engineering application of the mechanical properties of unsaturated soil, which significantly improves the reliability of experimental data and the universality of the device.

[0044] Further, the piston body 31 is provided with a double-layer sealing ring at the connection with the pressure chamber 2, which includes a Y-shaped sealing ring 8 at the inner layer and a guide ring at the outer layer. There is a small gap between the piston body 31 and the pressure chamber 2, so by setting the double-layer sealing ring, the sealing between the piston body 31 and the pressure chamber 2 is increased, and the Y-shaped sealing ring 8 can be tightly combined with the piston body 31 to form an initial seal. As the internal pressure of the pressure chamber 2 further increases, the Y-shaped sealing ring 8 is pressed against the sealing surface, and the sealing is automatically enhanced. The guide ring has a large friction force with the inside of the pressure chamber 2, and the friction force enhances the pressure on the Y-shaped sealing ring 8, so that the sealing space is enhanced.

[0045] Further, the pore size of the hydrophobic semi-permeable membrane is in the range of 0.1-0.3 μm, and the surface is grafted with a fluorocarbon chain modification layer. The pore size of 0.1-0.3 μm is based on the principle of size screening, allowing gas molecules to pass freely, while using capillary pressure to block water penetration, balancing the gas permeability and separation accuracy. The fluorocarbon chain modification layer grafted on the surface makes the membrane surface super-hydrophobic, preventing water from wetting and reducing soil sample pollutant and organic matter adsorption, improving anti-clogging ability and mechanical strength, and resisting extreme environments such as high salt, acid and alkali.

[0046] Further, the first and second clay plates 311 and 21 are integrally formed with the spiral groove 5 thereon, the cross section of the spiral groove 5 is semicircular, the pitch of the spiral groove 5 gradually increases from the center to the outside, the inlet of the spiral groove 5 is located at the center position of the first and second clay plates 311 and 21, and the outlet of the spiral groove 5 is located at the edge position of the first and second clay plates 311 and 21. The spiral groove 5 extends from the center to the edge of the first and second clay plates 311 and 21, and is recessed into the first and second clay plates 311 and 21. The water discharged in the unsaturated soil flows along the inlet to the outlet of the spiral groove 5.

[0047] Further, the vertical loading mechanism 3 includes a motor, a speed reducer and a coupling arranged in sequence from top to bottom. The motor is connected with the speed reducer through a locking nut, the speed reducer is connected with the coupling through a locking nut, and the coupling is connected with the piston body 31 through a ball screw. The motor increases the torque through the speed reducer to promote the linear motion of the ball screw, and drives the piston body 31 to move downward.

[0048] Further, a bottom groove is formed at the top center of the base 1, and an adapter block is fixedly provided at the bottom end of the pressure chamber 2. The adapter block cooperates with the groove to keep the pressure chamber 2 concentric with the vertical loading mechanism 3. The bottom groove at the top of the base 1 can be adapted to the adapter block, so that the pressure chamber 2 is clamped into the base 1, and the adapter block is the center of the pressure chamber 2, corresponding to the position of the vertical loading mechanism 3.

[0049] Further, the piston body 31 is provided with an alignment groove at the top end, and the alignment groove is aligned with the bottom groove. In order to better align the vertical loading mechanism 3 and the pressure chamber 2, the alignment groove on the piston body 31 is located at the center of the vertical loading mechanism 3, and when the alignment groove is aligned with the bottom groove in the vertical direction, the vertical loading mechanism 3 is in an aligned state with the pressure chamber 2.

[0050] Embodiment 2:

[0051] With reference to Figures 4 to 6 In the embodiment, the external gas source is connected with the second three-way valve 7 through a quick plug connector, and a one-way valve in the direction from the second three-way valve 7 to the exhaust measuring device is further arranged between the second three-way valve 7 and the exhaust measuring device, for controlling gas exhaust, and the inner wall of the external gas source is cladded with a dimethylsiloxane coating. The quick plug connector can realize rapid connection, and the one-way valve is used to keep the exhaust passage in a closed state when the external gas source delivers gas at a certain gas pressure, and the one-way valve is opened when the gas in the unsaturated soil is exhausted, so as to measure the amount of exhausted gas. The dimethylsiloxane coating has low surface tension and excellent sealing performance, and can form a dense waterproof and airproof barrier on the surface of the material, so that the gas is prevented from adhering to the inner wall of the exhaust passage.

[0052] Further, a buffer cavity is further arranged between the first three-way valve 6 and the drainage measuring device, the buffer cavity is in a cylindrical shape, and the buffer cavity is connected with the pipeline between the first three-way valve 6 and the drainage measuring device through a soft connector. In order to prevent the water from flowing into the drainage measuring device with a certain kinetic energy when draining, causing inaccurate results, the buffer cavity can collect the inflowing water, and the buffer cavity has a certain elasticity and can flow into the drainage measuring device under extrusion. The soft connector can withstand greater pressure and will not be separated under pressure when extruding the buffer cavity.

[0053] Further, a protective net is further arranged at the gas inlet of the first exhaust pipe 312 and the second exhaust pipe 22, and the protective net is fixedly connected with the first exhaust pipe 312 and the second exhaust pipe 22 through a clamp. In order to prevent the soil sample from being blocked in front of the hydrophobic semi-permeable membrane during the consolidation process along with the gas flow, the protective net is arranged to intercept a large amount of soil sample in front of the first exhaust pipe 312 and the second exhaust pipe 22, and the protective net is fixedly connected with the first exhaust pipe 312 and the second exhaust pipe 22 through the clamp, so that the connection strength is high.

[0054] In the description of the utility model, it is understood that the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0055] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect;Can be two element inside communication or two element mutual action relation.For ordinary skilled person in the art, can understand the specific meaning of above-mentioned terms in the utility model according to specific circumstances.

[0056] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect;Can be two element inside communication or two element mutual action relation.For ordinary skilled person in the art, can understand the specific meaning of above-mentioned terms in the utility model according to specific circumstances.

[0057] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0058] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An apparatus for water-air partitioning measurement in non-saturated soil consolidation processes, characterized by: It comprises a base (1), a pressure chamber (2) and a vertical loading mechanism (3) connected in turn from bottom to top; The bottom of the vertical loading mechanism (3) is a piston body (31), which extends downward into the pressure chamber (2) to form a piston structure, and a soil sample placement space (4) is provided between the two; The bottom of the piston body (31) is provided with a first clay plate (311) and a first exhaust duct (312), the bottom of the pressure chamber (2) is provided with a second clay plate (21) and a second exhaust duct (22), the top of the first clay plate (311) and the bottom of the second clay plate (21) are provided with a spiral groove (5), the depth of the spiral groove (5) gradually decreases along the direction from one end of the inlet to the other end of the outlet, the outlet of the spiral groove (5) is selectively connected with one of an external airless water source and a drainage measuring element through a first three-way valve (6), the first exhaust duct (312) and the second exhaust duct (22) are both provided with a hydrophobic semi-permeable membrane, and the outlets of the first exhaust duct (312) and the second exhaust duct (22) are selectively connected with one of an external gas source and an exhaust measuring element through a second three-way valve (7), the spiral groove (5), the first three-way valve (6) and the drainage measuring element form a drainage channel in communication with the soil sample placement space (4), and the first exhaust duct (312) / the second exhaust duct (22), the second three-way valve (7) and the exhaust measuring element form an exhaust channel in communication with the soil sample placement space (4).

2. The device for water-gas separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: A double-layer sealing ring is arranged at the connection between the piston body (31) and the pressure chamber (2), and the double-layer sealing ring comprises a Y-shaped sealing ring (8) in the inner layer and a guide ring in the outer layer.

3. The device for water-gas separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: The pore size of the hydrophobic semi-permeable membrane is in the range of 0.1-0.3 μm, and a fluorocarbon chain modified layer is grafted on the surface.

4. The device for water-gas separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: The external gas source is connected with the second three-way valve (7) through a quick plug connector, a one-way valve is further arranged between the second three-way valve (7) and the exhaust measuring element in the direction from the second three-way valve (7) to the exhaust measuring element, for controlling the gas discharge, and a dimethylsiloxane coating layer is fused on the inner wall of the external gas source.

5. The device for water-gas separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: A buffer cavity is further arranged between the first three-way valve (6) and the drainage measuring element, the buffer cavity is in a cylindrical shape, and the pipeline between the first three-way valve (6) and the drainage measuring element is connected with the buffer cavity through a soft connector.

6. The device for water-gas separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: The first clay plate (311) and the second clay plate (21) are integrally formed with the spiral groove (5) thereon, the cross section of the spiral groove (5) is semicircular, the pitch of the spiral groove (5) gradually increases from the center to the outside, the inlet of the spiral groove (5) is located at the center position of the first clay plate (311) and the second clay plate (21), and the outlet of the spiral groove (5) is located at the edge position of the first clay plate (311) and the second clay plate (21). 7.The device for water vapor separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: The first exhaust pipe (312) and the second exhaust pipe (22) are also provided with protective nets at the air inlet, and the protective nets are fixedly connected with the first exhaust pipe (312) and the second exhaust pipe (22) through clamps. 8.The device for water vapor separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: The vertical loading mechanism (3) comprises a motor, a speed reducer and a coupling which are sequentially arranged from top to bottom. The motor is connected with the speed reducer through a locking nut, the speed reducer is connected with the coupling through a locking nut, and the coupling is connected with the piston body (31) through a ball screw. 9.The device for water vapor separation measurement in the consolidation process of unsaturated soil according to claim 1, characterized in that: A bottom groove is formed at the top center position of the base (1), a transfer block is fixedly arranged at the bottom end of the pressure chamber (2), and the transfer block is matched with the groove, so that the pressure chamber (2) and the vertical loading mechanism (3) are kept concentric. 10.The device for water vapor separation measurement in the consolidation process of unsaturated soil according to claim 9, characterized in that: An alignment groove is formed at the top end of the piston body (31), and the alignment groove is aligned with the bottom groove.

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