Device for rapidly measuring matrix suction of unsaturated soil

Abstract

The utility model discloses a device for rapidly measuring the suction force of an unsaturated soil matrix, which comprises a support column fixedly mounted at the top end of a base, a suction force measuring device is arranged above the base, and a lifting device is arranged in the support column; the suction measuring device comprises a suction assembly, a measuring assembly is arranged on the left side of the suction assembly, and an adding assembly is arranged at the left end of the measuring assembly; the lifting device comprises a first lifting assembly and a second lifting assembly which are fixedly installed on the front side and the rear side of the measuring assembly, an adjusting assembly used for driving the first lifting assembly to move up and down is arranged in the supporting column on the front side, and a guide rod used for allowing the second lifting assembly to move up and down is arranged in the supporting column on the rear side. The problems that when the water absorption capacity of the unsaturated soil matrix is measured, due to the fact that a probe is manually buried into the soil matrix, time and labor are wasted, and the water absorption capacity of the soil matrixes at different depths and different positions is inconvenient to detect are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of matrix suction measurement, and relates to a device for quickly measuring the matrix suction of unsaturated soil. Background Art

[0002] When conducting unsaturated soil research, matrix suction is usually considered as an independent variable, and the suction of the unsaturated soil matrix needs to be measured. When the existing suction device measures the unsaturated soil matrix, water is injected into a professional detection probe. When the matrix suction is large, the water is sucked from the probe into the soil. Conversely, the water in the soil is sucked into the probe, so as to detect the matrix suction.

[0003] For example, the Chinese patent application number CN202211598749.1 is an indoor rapid automatic testing device and method for the suction of roadbed soil matrix. The probe is a hollow cylinder. The side walls of the probe are respectively an inner permeable stone layer, a hydrophilic membrane, and an outer permeable stone layer from the inside to the outside. One end of the probe is sealed by a base. The permeability coefficients of the inner and outer permeable stone layers are 5 to 20 times that of the hydrophilic membrane. The water exchange tube, the two ends of which are respectively sealed and connected to the end of the probe without a base and a water storage pipe. The water storage pipe is a sealed structure, and a water injection port is provided above the water storage pipe. The water exchange tube includes a straight pipe section and a corrugated pipe section. It has the following technical defects:

[0004] When using a probe to measure the water absorption capacity of an unsaturated soil matrix, the probe is manually buried in the soil matrix, which is not only time-consuming and labor-intensive, but also inconvenient to detect the water absorption capacity of the soil matrix at different depths and locations. Summary of the invention

[0005] In order to achieve the above-mentioned purpose, the utility model provides a device for quickly measuring the suction of an unsaturated soil matrix, which solves the problem that when using a probe to measure the water absorption capacity of an unsaturated soil matrix, the probe is manually buried in the soil matrix, which is not only time-consuming and labor-intensive, but also inconvenient to detect the water absorption capacity of the soil matrix at different depths and different positions.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is a device for quickly measuring the suction of an unsaturated soil matrix, comprising a support column fixedly mounted on the top of a base, wherein there are two support columns, a suction measuring device is arranged above the base, and a lifting device is arranged inside the support column; the suction measuring device comprises a suction component, a measuring component is arranged on the left side of the suction component, and an adding component is arranged at the left end of the measuring component; the lifting device comprises a first lifting component and a second lifting component fixedly mounted on the front and rear sides of the measuring component, an adjusting component for driving the first lifting component to move up and down is arranged in the front support column, and a guide rod for the second lifting component to move up and down is arranged in the rear support column.

[0007] Furthermore, the measuring component includes a water storage tube, an observation window is provided on the right side of the water storage tube, and scale lines are provided on the observation window.

[0008] Furthermore, the suction assembly includes a connecting hose arranged on the front and rear sides of the water storage pipe, a probe is arranged at the right end of the connecting hose, a frame is fixedly installed at the bottom end of the probe, an inner permeable stone layer is arranged in the frame body of the frame, a hydrophilic membrane is arranged below the inner permeable stone layer, and an outer permeable stone layer is arranged below the hydrophilic membrane.

[0009] Furthermore, the adding component includes a water injection pipe arranged at the left end of the water storage pipe, and a water adding bucket is arranged at the top end of the water injection pipe.

[0010] Furthermore, the adjustment assembly includes a screw rod arranged in the front support column, the top end of the screw rod is connected to the top end of the column body of the front support column through a bearing, and the bottom end of the screw rod is connected to the top end of the base through a bearing; a motor is fixedly installed on the top end of the front support column, and the output shaft of the motor is transmission-connected to the top end of the screw rod.

[0011] Furthermore, the first lifting assembly includes a threaded sleeve plate threadedly connected to the screw rod, and a connecting plate connected to the water storage pipe is fixedly installed at the rear end of the threaded sleeve plate.

[0012] Furthermore, the second lifting assembly includes a sleeve plate sleeved on the guide rod, and a fixing plate connected to the water storage pipe is fixedly mounted on the front end of the sleeve plate.

[0013] Furthermore, a through groove is provided on the seat body of the base, the suction measuring device is located in the through groove, four rollers are provided at the bottom end of the base, and a handle is fixedly installed at the left end of the base.

[0014] The beneficial effects of the utility model are:

[0015] The utility model is provided with rollers, a handle and a lifting device, and the base can be pushed to move by the handle, so that the suction measuring device can be moved to the unsaturated soil matrix where the measurement is required, so as to facilitate the rapid measurement of the suction of any unsaturated soil matrix; and the motor drives the screw to rotate, so that the connecting plate on the threaded sleeve can drive the probe on the bottom end of the water storage pipe to move downward along the rod body of the screw, and at the same time, the fixed plate on the sleeve can guide the water storage pipe to prevent the water storage pipe from tipping over, and then the probe can be quickly controlled to move to unsaturated soil matrices of different depths, so as to facilitate the rapid detection of the water absorption capacity of unsaturated soil matrices of different depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of a device for rapidly measuring the matrix suction of unsaturated soil according to an embodiment of the utility model.

[0018] Figure 2 It is a cross-sectional view of a support column of an embodiment of the utility model.

[0019] Figure 3 It is a schematic structural diagram of a suction force measuring device according to an embodiment of the utility model.

[0020] Figure 4 It is a schematic diagram of the internal structure of the probe of the embodiment of the utility model.

[0021] Figure 5 It is a structural schematic diagram of a lifting device according to an embodiment of the utility model.

[0022] In the figure, 100. base, 101. through slot, 200. support column, 300. suction measuring device, 310. suction assembly, 311. connecting hose, 312. probe, 313. frame, 314. outer permeable stone layer, 315. hydrophilic membrane, 316. inner permeable stone layer, 320. measuring assembly, 321. water storage pipe, 322. observation window, 330. adding assembly, 331. water injection pipe, 332. water adding bucket, 400. lifting device, 410. adjustment assembly, 411. motor, 412. screw, 420. first lifting assembly, 421. threaded sleeve plate, 422. connecting plate, 430. guide rod, 440. second lifting assembly, 441. sleeve plate, 442. fixing plate, 001. Roller, 002. Grip. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1~Figure 5 As shown, the utility model provides a device for quickly measuring the suction of an unsaturated soil matrix, including a support column 200 fixedly mounted on the top of a base 100, and there are two support columns 200. A suction measuring device 300 for measuring the suction of the unsaturated soil matrix is ​​arranged above the base 100, and a lifting device 400 for driving the suction measuring device 300 to approach the unsaturated soil matrix is ​​arranged in the support column 200.

[0025] A through groove 101 for the suction measuring device 300 to move up and down is provided on the base body of the base 100. A roller 001 for driving the base 100 to move is provided at the bottom of the base 100, and there are four rollers 001. The four rollers 001 are distributed in a linear array at the four corners of the bottom of the base 100, so that the suction measuring device 300 can be moved to the desired unsaturated soil matrix by the four rollers 001 on the bottom of the base 100, so as to facilitate the rapid measurement of the suction of any unsaturated soil matrix; a handle 002 for driving the base 100 to move is fixedly installed at the left end of the base 100, so that the four rollers 001 on the bottom of the base 100 can be driven to move by the handle 002.

[0026] The suction measuring device 300 includes a suction component 310 for applying suction to an unsaturated soil matrix, a measuring component 320 for measuring the suction component 310 is arranged on the left side of the suction component 310, an adding component 330 for adding a water source into the measuring component 320 is arranged at the left end of the measuring component 320, and the suction component 310 and the measuring component 320 can approach the unsaturated soil matrix through the through groove 101, and quickly measure the water absorption capacity of the unsaturated soil matrix.

[0027] The measuring component 320 includes a water storage pipe 321 for storing test water. An observation window 322 for observing the suction of the unsaturated soil matrix is ​​arranged on the right side of the water storage pipe 321, and the observation window 322 is engraved with scale lines for observing the change of water level in the water storage pipe 321. When the water absorption capacity of the unsaturated soil matrix is ​​tested by the suction component 310, the change of water volume in the water storage pipe 321 can be observed through the scale lines on the observation window 322, and then the detectable water level changes, so as to detect the suction of the soil matrix through the change of water level.

[0028] The suction assembly 310 includes a connecting hose 311 arranged at the front and rear sides of the water storage pipe 321, so as to facilitate the transport and recharging of the test water in the water storage pipe 321 to the probe 312 through the two connecting hoses 311; the right end of the connecting hose 311 is provided with the probe 312, and the bottom end of the probe 312 is fixedly installed with a frame 313, and the frame 313 is provided with an inner permeable stone layer 316, and a hydrophilic membrane 315 is provided below the inner permeable stone layer 316, and an outer permeable stone layer 314 is provided below the hydrophilic membrane 315; and the permeability coefficients of the outer permeable stone layer 314 and the inner permeable stone layer 316 are both 5-2 times the permeability coefficient of the hydrophilic membrane 315. 0 times, ensuring that only water passes through the hydrophilic membrane 315 under a certain air pressure, and the water can pass through quickly. The hydrophilic membrane 315 is used to isolate the water in the device from the outside world by utilizing the property that it is only water-permeable but not air-permeable within a certain pressure range. The water depth inside the water storage pipe 321 makes the pressure on the hydrophilic membrane 315 fall within this pressure range. When the water absorption capacity of the unsaturated soil matrix is ​​large, the water is absorbed from the probe 312 into the soil. On the contrary, the water in the soil is absorbed into the probe 312, thereby causing the water level inside the water storage pipe 321 to change, and the water absorption capacity of the unsaturated soil matrix is ​​determined by observing the scale line on the observation window 322.

[0029] The adding component 330 includes a water injection pipe 331 arranged at the left end of the water storage pipe 321, and a water adding bucket 332 for adding test water into the water storage pipe 321 is arranged at the top of the water injection pipe 331, so that the test water is added into the water storage pipe 321 through the water adding bucket 332 and the water injection pipe 331; when testing the water absorption capacity of the unsaturated soil matrix, water is firstly injected into the water storage pipe 321 through the water adding bucket 332 and the water injection pipe 331, and the probe 312 is connected with the water storage pipe 321 through the connecting hose 311, so the water inside the water storage pipe 321 will also flow into the probe 312. Then, the probe 312 is buried in the unsaturated soil matrix to be tested, and under the action of the outer permeable stone layer 314, the inner permeable stone layer 316 and the hydrophilic membrane 315, the water level inside the water storage pipe 321 changes, and the water absorption capacity of the unsaturated soil matrix is ​​observed and determined through the scale line on the observation window 322.

[0030] The lifting device 400 includes a first lifting component 420 and a second lifting component 440 fixedly installed on the front and rear sides of the measuring component 320. An adjusting component 410 for driving the first lifting component 420 to move up and down is provided in the front support column 200, and a guide rod 430 for the second lifting component 440 to move up and down is provided in the rear support column 200.

[0031] The adjustment component 410 includes a screw 412 arranged in the front support column 200 for rotation, and the top end of the screw 412 is connected to the top end of the column of the front support column 200 through a bearing, and the bottom end of the screw 412 is connected to the top end of the base 100 through a bearing to facilitate the rotation of the screw 412; a motor 411 for driving the screw 412 to rotate is fixedly installed on the top end of the front support column 200, and the shaft end of the output shaft of the motor 411 is connected to the top end of the screw 412 through a coupling to facilitate the synchronous rotation of the screw 412 under the operation of the motor 411.

[0032] There are two first lifting assemblies 420, which are symmetrically welded to the front end of the water storage pipe 321 in an upper and lower manner, and include a threaded sleeve 421 that is threadedly connected to the first lifting assembly 420 and the screw rod 412. The rear end of the threaded sleeve 421 is fixedly installed with a connecting plate 422 for connecting to the water storage pipe 321, so that when the screw rod 412 rotates, the threaded sleeve 421 can move up and down along the rod body of the screw rod 412, thereby driving the measuring assembly 320 to move into the unsaturated soil matrix, so as to quickly detect the water absorption capacity of the unsaturated soil matrix.

[0033] There are two second lifting assemblies 440, and the two second lifting assemblies 440 are welded symmetrically at the rear end of the water storage pipe 321. The second lifting assembly 440 includes a sleeve 441 mounted on the guide rod 430 for sliding up and down, and a fixing plate 442 for connecting with the water storage pipe 321 is fixedly installed at the front end of the sleeve 441; thereby, the screw 412 can be driven to rotate by the motor 411, so that the connecting plate 422 on the threaded sleeve 421 can drive the probe 312 on the bottom end of the water storage pipe 321 to move downward along the rod body of the screw 412, and at the same time, the fixing plate 442 on the sleeve 441 can guide the water storage pipe 321 to prevent the water storage pipe 321 from tipping over, and then the probe 312 can be quickly controlled to move to unsaturated soil matrices of different depths, so as to facilitate rapid detection of the water absorption capacity of unsaturated soil matrices of different depths.

[0034] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A device for rapidly measuring the matrix suction of unsaturated soil, comprising a support column (200) fixedly mounted on the top of a base (100), characterized in that: There are two support columns (200), a suction measuring device (300) is arranged above the base (100), and a lifting device (400) is arranged inside the support column (200); the suction measuring device (300) includes a suction component (310), a measuring component (320) is arranged on the left side of the suction component (310), and an adding component (330) is arranged at the left end of the measuring component (320); the lifting device (400) includes a first lifting component (420) and a second lifting component (440) fixedly mounted on the front and rear sides of the measuring component (320), an adjusting component (410) for driving the first lifting component (420) to move up and down is arranged inside the front support column (200), and a guide rod (430) for allowing the second lifting component (440) to move up and down is arranged inside the rear support column (200).

2. The device for rapidly measuring the matrix suction of unsaturated soil according to claim 1, characterized in that: The measuring component (320) comprises a water storage pipe (321), an observation window (322) is provided on the right side of the water storage pipe (321), and scale lines are provided on the observation window (322).

3. The device for rapidly measuring the matrix suction of unsaturated soil according to claim 2, characterized in that: The suction assembly (310) comprises a connecting hose (311) arranged at the front and rear sides of the water storage pipe (321); a probe (312) is arranged at the right end of the connecting hose (311); a frame (313) is fixedly mounted at the bottom end of the probe (312); an inner permeable stone layer (316) is arranged inside the frame body of the frame (313); a hydrophilic membrane (315) is arranged below the inner permeable stone layer (316); and an outer permeable stone layer (314) is arranged below the hydrophilic membrane (315).

4. The device for rapidly measuring the matric suction of unsaturated soil according to claim 2, characterized in that: The adding component (330) comprises a water injection pipe (331) arranged at the left end of the water storage pipe (321), and a water adding bucket (332) is arranged at the top end of the water injection pipe (331).

5. The device for rapidly measuring the matrix suction of unsaturated soil according to claim 1, characterized in that: The adjustment assembly (410) comprises a screw rod (412) arranged in the front support column (200); the top end of the screw rod (412) is connected to the top end of the column body of the front support column (200) via a bearing, and the bottom end of the screw rod (412) is connected to the top end of the base (100) via a bearing; a motor (411) is fixedly mounted on the top end of the front support column (200), and the output shaft of the motor (411) is drivingly connected to the top end of the screw rod (412).

6. The device for rapidly measuring the matrix suction of unsaturated soil according to claim 4, characterized in that: The first lifting assembly (420) comprises a threaded sleeve (421) threadedly connected to the screw rod (412), and a connecting plate (422) connected to the water storage pipe (321) is fixedly mounted on the rear end of the threaded sleeve (421).

7. The device for rapidly measuring the matrix suction of unsaturated soil according to claim 6, characterized in that: The second lifting assembly (440) comprises a sleeve plate (441) sleeved on the guide rod (430), and a fixing plate (442) connected to the water storage pipe (321) is fixedly mounted on the front end of the sleeve plate (441).

8. The device for rapidly measuring the matrix suction of unsaturated soil according to claim 1, characterized in that: A through slot (101) is provided on the base body of the base (100), the suction force measuring device (300) is located in the through slot (101), four rollers (001) are provided at the bottom end of the base (100), and a handle (002) is fixedly mounted at the left end of the base (100).

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