CN106248551B - Lateral sectional sampling undisturbed clay ultrafiltration test device - Google Patents
Lateral sectional sampling undisturbed clay ultrafiltration test device Download PDFInfo
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- CN106248551B CN106248551B CN201610648632.8A CN201610648632A CN106248551B CN 106248551 B CN106248551 B CN 106248551B CN 201610648632 A CN201610648632 A CN 201610648632A CN 106248551 B CN106248551 B CN 106248551B
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- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 46
- 238000005070 sampling Methods 0.000 title claims abstract description 38
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 239000004927 clay Substances 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000741 silica gel Substances 0.000 claims abstract description 35
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 claims 1
- 210000000416 exudates and transudate Anatomy 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009715 pressure infiltration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a lateral sectional sampling undisturbed clay ultrafiltration test device which comprises a closed cavity defined by a top cover, a base and a side wall, wherein a flexible silica gel sleeve and a perforated sleeve are arranged in the closed cavity, a liquid inlet channel is arranged in the top cover, a bottom sampling port is arranged in the base, a confining pressure cavity is formed between the perforated sleeve and the flexible silica gel sleeve, a confining pressure hole communicated with the confining pressure cavity is formed in the side wall, lateral sampling ports are arranged at corresponding positions of the side wall, the perforated sleeve and the flexible silica gel sleeve, a spiral pipe is arranged at the lateral sampling port, threaded interfaces matched with the spiral pipe are arranged on the side wall and the flexible silica gel sleeve, and a flexible filter screen is arranged at a position, corresponding to the lateral sampling port, on the flexible silica gel sleeve. The invention adds a plurality of lateral sampling ports on the ultrafiltration tester, and can sample the exudates passing through different positions of the undisturbed soil sample according to the requirements, thereby realizing the analysis of the water quality change condition of the exudates in the clay.
Description
Technical Field
The invention relates to an ultrafiltration test device for laboratory test of the permeability and salt filtering capacity of undisturbed clay, in particular to an undisturbed clay ultrafiltration test device for lateral sectional sampling.
Background
The main component of the weak permeable layer is clay, and the clay minerals in the clay mainly comprise montmorillonite, illite and kaolinite. To verify the salt leaching effect of the weakly permeable layer, a high pressure permeation test was performed. The existing penetration testing equipment is mainly a Darcy tester, but the Darcy tester is only suitable for low pressure or micro pressure. Conventional high pressure infiltration equipment such as commercially available three-axis pressure gauges, while capable of measuring high pressures, are only suitable for use with hard rock to be consolidated and are not suitable for use with clay samples.
The applicant filed 5/8/2015 with chinese patent application No. 201510229210.2 discloses a pseudo-triaxial high-pressure penetration tester, which solves the problem of sealing the circumferential wall of a soil sample by pressing a flexible wall with confining pressure, and can be used for testing the penetration and salt filtration capacity of a viscous undisturbed soil sample. However, the pseudo-triaxial high-pressure penetration tester can only sample at the bottom outlet, and has few sampling points, so that the water quality change condition of the percolate in the clay cannot be analyzed.
Disclosure of Invention
Based on the technical problem, the invention provides an ultrafiltration test device for undisturbed clay by lateral sectional sampling.
The technical solution adopted by the invention is as follows:
a lateral sectional sampling undisturbed clay ultrafiltration test device comprises an ultrafiltration tester, wherein the ultrafiltration tester comprises an outer top cover, an outer base and a side wall for connecting the outer top cover and the outer base, the outer top cover, the outer base and the side wall form a closed cavity, an inner top cover, an inner base, a flexible silica gel sleeve for coating an undisturbed soil sample and a perforated sleeve are arranged in the closed cavity, the inner top cover is arranged below the outer top cover, a communicated liquid inlet channel is arranged in the inner top cover and the outer top cover, an axial pressure gauge is externally connected with the liquid inlet channel, the inner base is arranged above the outer base, a water outlet channel is arranged in the inner base, a water storage cavity communicated with the water outlet channel and a bottom sampling port for communicating the water storage cavity with the outside are arranged in the outer base, the inner top cover, the inner base and the flexible silica gel sleeve form an undisturbed soil sample permeation cavity, and the perforated sleeve is sleeved outside the flexible silica gel sleeve, form between porose sleeve pipe and flexible silica gel sleeve pipe and enclose and press the chamber, set up the intercommunication on the lateral wall and enclose the confined pressure hole in pressure chamber, enclose the external confined pressure manometer in pressure hole, at the lateral wall, porose sleeve pipe and flexible silica gel sleeve pipe correspond the position department and be provided with the side direction sample connection, install the screwed pipe in side direction sample connection department, be provided with on lateral wall and flexible silica gel sleeve pipe with the hickey of screwed pipe looks adaptation, the position department that corresponds the side direction sample connection on flexible silica gel sleeve pipe is provided with flexible filter screen.
Preferably, the lateral sampling ports are 2-5 and are arranged along the side wall at intervals from top to bottom.
Preferably, the bottom surface of inner top cover is equipped with first recess, places first drainage board in first recess, the top surface of interior base is equipped with the second recess, places the second drainage board in the second recess, be equipped with a cavity between inlet channel and the first drainage board, be equipped with end cavity between outlet channel and the second drainage board, be equipped with the steel gauze between the contact surface about drainage board and the original state soil sample.
Preferably, the bottom of inside cap is equipped with downward convex circumference flange, the top of interior base is equipped with the convex circumference flange that makes progress, flexible silica gel sleeve pipe adopts solid steel card to consolidate sealedly with the outside of inside cap and interior base circumference flange.
Preferably, the inner base and the inner top cover are respectively contacted with the side wall through a first sealing rubber ring, the upper end face of the inner top cover is contacted with the outer top cover through a second sealing rubber ring, the lower end face of the inner base is contacted with the outer base through a third sealing rubber ring, and the outer top cover and the outer base are respectively fixed on the upper end face and the lower end face of the side wall through screws.
Preferably, the ultrafiltration test device further comprises a manual pressurizing device and a self-gravity pressurizing device, wherein the manual pressurizing device comprises a liquid storage tank, a water pressing well structure for manually pressing out liquid stored in the liquid storage tank is arranged on the liquid storage tank, and a liquid injection port is arranged above one end of the liquid storage tank; the self-gravity pressurizing device comprises a base, a top plate and a bearing plate, wherein a supporting column is arranged between the base and the top plate, the bearing plate is sleeved on the supporting column and can move up and down along the supporting column, a pressure distribution plate is arranged on the bearing plate, a hydraulic cavity is arranged on the base, a pressure guide column is arranged in the hydraulic cavity and is connected with the bearing plate; manual pressure device sets up two altogether, is manual pressure device of axle load and the manual pressure device of confined pressure respectively, the gravity pressure device sets up two altogether, is first gravity pressure device and second gravity pressure device respectively, the liquid outlet of the manual pressure device of axle load is through first hydraulic pressure connecting pipe and first gravity pressure device's hydraulic pressure chamber intercommunication, first gravity pressure device's hydraulic pressure chamber is through first steady voltage output tube and inlet channel intercommunication, the liquid outlet of confined pressure manual pressure device is through second hydraulic pressure connecting pipe and second gravity pressure device's hydraulic pressure chamber intercommunication, the second gravity pressure device's hydraulic pressure chamber is through second steady voltage output tube and confined pressure hole intercommunication.
Preferably, the pressurized-water well structure comprises a well body and a pressure handle, the well body is of a hollow cylindrical structure, the bottom of the well body is communicated with the lower part of the liquid storage tank through a liquid inlet pipe, a liquid outlet is formed in the upper part of the well body, a piston is arranged in the well body, and the piston is connected with the pressure handle which drives the piston to reciprocate.
Preferably, the ultrafiltration tester is provided with a plurality of the ultrafiltration testers, the liquid inlet channel and the confining pressure hole of each ultrafiltration tester are respectively connected with a tee joint, the tee joints at the liquid inlet channels of all the ultrafiltration testers are mutually communicated, and the tee joints at the confining pressure holes of all the ultrafiltration testers are also mutually communicated.
Preferably, base and roof all are squarely, the support column sets up four altogether, is located the four corners department of base and roof respectively, lead the center connection of pressure column and pressure-bearing plate.
The beneficial technical effects of the invention are as follows:
1. the invention adds a plurality of lateral sampling ports on the ultrafiltration tester, and can sample the exudates passing through different positions of the undisturbed soil sample according to the requirements, thereby realizing the analysis of the water quality change condition of the exudates in the clay.
2. According to the invention, the side sampling can be easily realized by installing the screw pipe at the side sampling port and arranging the threaded interfaces matched with the screw pipe on the side wall and the flexible silica gel sleeve, and the side sampling has a better sealing effect.
3. The invention adopts the way of matching the manual pressure device with the self-gravity pressure device to mechanically add axial pressure and confining pressure to the ultrafiltration tester, compared with a pulse type pressure pump or a peristaltic pump, the pressure control is more stable and accurate, and the test error in the test process is greatly reduced.
4. Because of adopting the pure mechanical pressurizing mode of the self-gravity pressurizing device and the manual pressurizing device, the undisturbed clay ultrafiltration test device can be simultaneously provided with a plurality of ultrafiltration test instruments for carrying out a plurality of groups of test operations, the test efficiency is higher, and each ultrafiltration test instrument is provided with a tee joint at the liquid inlet channel and the confining pressure hole, so that the connection can be easily realized, the structure is simple, and the operation and the control are easy.
Drawings
The invention will be further described with reference to the following detailed description and drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a self-gravity pressurizing device;
FIG. 3 is a schematic view of a manual pressurizing device;
FIG. 4 is a schematic diagram of the structural principle of the ultrafiltration tester;
fig. 5 is a partial enlarged view of fig. 4, mainly illustrating the structure at the lateral sampling port.
In the figure: 1-an ultrafiltration tester, 101-an outer top cover, 102-an outer base, 103-a side wall, 104-an inner top cover, 105-an inner base, 106-a flexible silica gel sleeve, 107-a perforated sleeve, 108-a liquid inlet channel, 109-an axial pressure gauge, 1010-a water outlet channel, 1011-a water storage cavity, 1012-a bottom sampling port, 1013-an original soil sample permeation cavity, 1014-a confining pressure cavity, 1015-a confining pressure hole, 1016-a confining pressure gauge, 1017-a lateral sampling port, 1018-a spiral tube, 1019-a threaded interface, 1020-a flexible filter screen, 1021-a solid seal steel card, 1022-a first filter screen, 1023-a second filter screen, 1024-a top inner cavity, 1025-a bottom inner cavity, 1026-a steel gauze screen, 1027-a screw, 1028-a connecting pipe and 2-a manual pressurizing device, 201-a liquid storage tank, 202-a water pressing well structure, 203-a liquid injection port, 2021-a well body, 2022-a pressing handle, 2023-a liquid inlet pipe, 2024-a liquid outlet, 2025-a piston, 2026-a film, 211-a shaft pressure manual pressurizing device, 212-a confining pressure manual pressurizing device, 3-a self-gravity pressurizing device, 301-a base, 302-a top plate, 303-a pressure bearing plate, 304-a supporting column, 305-a pressure distribution plate, 306-a hydraulic cavity, 307-a pressure guide column, 4-a first hydraulic connecting pipe, 5-a pressure stabilizing output pipe, 6-a tee joint, 7-a second hydraulic connecting pipe, 8-a one-way valve, 9-a first water stop valve and 10-a second water stop valve.
Detailed Description
As shown in figure 1, the undisturbed clay ultrafiltration test device comprises an ultrafiltration tester 1, a manual pressurizing device 2 and a self-gravity pressurizing device 3. As shown in fig. 4, the ultrafiltration tester 1 comprises an outer cap 101, an outer base 102, and a sidewall 103 connecting the outer cap 101 and the outer base 102, wherein the outer cap 101, the outer base 102 and the sidewall 103 define a sealed cavity, and an inner cap 104, an inner base 105, a flexible silica gel sleeve 106 for covering an undisturbed soil sample, and a perforated sleeve 107 are disposed in the sealed cavity. The inner top cover 104 is arranged below the outer top cover 101, a liquid inlet channel 108 which is communicated with the inner top cover 104 and the outer top cover 101 is arranged in the inner top cover 104, and the liquid inlet channel 108 is externally connected with an axial pressure gauge 109. The inner base 105 is arranged above the outer base 102, a water outlet channel 1010 is arranged in the inner base 105, a water storage cavity 1011 communicated with the water outlet channel and a bottom sampling port 1012 communicating the water storage cavity with the outside are arranged in the outer base 102. Interior top cap 104, interior base 105 encloses into original state soil sample infiltration chamber 1013 with flexible silica gel sleeve 106, porose sleeve 107 cover is in the outside of flexible silica gel sleeve 106, form confining pressure chamber 1014 between porose sleeve 107 and flexible silica gel sleeve 106, also form a cavity between porose sleeve 107 and lateral wall 103, confining pressure hole 1015 has been seted up on the lateral wall, confining pressure hole 1015 and above-mentioned cavity intercommunication, and then intercommunication confining pressure chamber 1014, confining pressure manometer 1016 is connected outward to the confining pressure hole, be provided with second stagnant water valve 10 in confining pressure hole department. A lateral sampling port 1017 is arranged at a corresponding position of the side wall, the perforated sleeve and the flexible silica gel sleeve, as shown in fig. 5, a screw pipe 1018 is installed at the lateral sampling port 1017, a threaded interface 1019 matched with the screw pipe is arranged on the side wall 103 and the flexible silica gel sleeve 106, and a flexible filter screen 1020 is arranged at a position of the flexible silica gel sleeve 106 corresponding to the lateral sampling port. As shown in fig. 3, the manual pressurizing device 2 includes a tank 201, a pumping well structure 202 for manually pumping out a liquid stored in the tank is provided in the tank 201, and a liquid injection port 203 is provided above one end of the tank. As shown in fig. 2, the self-gravity pressurizing device 3 includes a base 301, a top plate 302 and a pressure-bearing plate 303, a support column 304 is disposed between the base 301 and the top plate 302, and the pressure-bearing plate 303 is sleeved on the support column 304 and can move up and down along the support column. A pressure distribution plate 305 is placed on the pressure bearing plate 303, a hydraulic cavity 306 is arranged on the base 301, a pressure guide column 307 is arranged in the hydraulic cavity 306, and the top end of the pressure guide column 307 is connected with the movable pressure bearing plate 303. As shown in fig. 1, two manual pressurizing devices are provided, namely, an axial pressure manual pressurizing device 211 and a confining pressure manual pressurizing device 212, and one self-gravity pressurizing device is provided. The liquid outlet of the manual axial pressure pressurizing device 211 is communicated with the hydraulic cavity 306 of the self-gravity pressurizing device 3 through a first hydraulic connecting pipe 4, the hydraulic cavity 306 is communicated with the liquid inlet of the tee joint 6 through a pressure stabilizing output pipe 5, one of the liquid outlets of the tee joint 6 is communicated with the liquid inlet channel 108, and the other liquid outlet is closed through a first water stop valve 9. And the liquid outlet of the confining pressure manual pressurizing device is communicated with the confining pressure hole 1015 through a second hydraulic connecting pipe 7. The first hydraulic connecting pipe 4, the pressure stabilizing output pipe 5 and the second hydraulic connecting pipe 7 are all provided with one-way valves 8, so that liquid can only be transmitted in one way and cannot flow back reversely.
Above-mentioned side direction sample connection 1017 is preferred to set up 2 ~ 5, and is interval arrangement from top to bottom along the lateral wall.
As a further design of the present invention, as shown in fig. 3, the pressurized-water well structure 202 includes a well 2021 and a pressure handle 2022, the well 2021 is a hollow cylindrical structure, the bottom of the well 2021 is communicated with the lower portion of the liquid storage tank 201 through a liquid inlet pipe 2023, a liquid outlet 2024 is disposed at the upper portion of the well 2021, a piston 2025 is disposed inside the well 2021, a rubber sheet 2026 is fixed below the piston 2025, and the piston 2025 is connected to the pressure handle 2022 for driving the piston 2025 to reciprocate. The structure and the working principle are consistent with those of a common pressurized water well.
Furthermore, the base 301 and the top plate 302 are both square, the number of the support columns 304 is four, the four support columns are respectively located at four corners of the base 301 and the top plate 302, and the pressure guide columns 306 are connected with the center of the pressure bearing plate 303. The structural design can enable the bearing plate to run more stably, and further, the accurate control of the axial pressure is facilitated.
Furthermore, the ultrafiltration tester is provided with a plurality of the ultrafiltration tester, a tee joint is connected to the liquid inlet channel and the confining pressure hole of each ultrafiltration tester, the tee joints at the liquid inlet channels of all the ultrafiltration testers are communicated with each other through pipelines, and the tee joints at the confining pressure holes of all the ultrafiltration testers are also communicated with each other through pipelines. Of course, the confining pressure can also be provided by the self-gravity pressurizing device and the confining pressure manual pressurizing device together, namely, water pressed out by the confining pressure manual pressurizing device firstly enters a hydraulic cavity of the other self-gravity pressurizing device and then enters the confining pressure hole under the action of the pressure bearing plate and the pressure guide column.
Furthermore, as shown in fig. 4, a downward convex circumferential flange is arranged at the bottom of the inner top cover, an upward convex circumferential flange is arranged at the top of the inner base, and the flexible silicone sleeve is sealed with the outer sides of the inner top cover and the inner base circumferential flange by a fixing steel clamp 1021. The bottom surface of inner top cap is equipped with first recess, places first drainage board 1022 in first recess, the top surface of interior base is equipped with the second recess, places second drainage board 1023 in the second recess, be equipped with top inner chamber 1024 between inlet channel and the first drainage board, be equipped with bottom inner chamber 1025 between outlet channel and the second drainage board. And steel gauze 1026 is arranged between the upper contact surface of the first water filtering plate and the undisturbed soil sample and between the lower contact surface of the second water filtering plate and the undisturbed soil sample. Interior base and interior top cap contact with the lateral wall through first sealed rubber ring respectively, interior top cap up end contacts with outer top cap through second sealed rubber ring, interior base lower extreme face contacts with outer base through third sealed rubber ring, outer top cap and outer base are fixed in terminal surface about the lateral wall through screw 1027 respectively.
The undisturbed clay ultrafiltration test device provided by the invention is applicable to undisturbed clay which can be a non-consolidated plastic viscous undisturbed soil sample. The specific working flow of the clay sample is described by taking the clay sample as an example and combining the structure of the invention:
1. preparing a sample: processing the clay sample into a cylindrical sample with accurate size;
2. lofting and sealing:
1) the flexible silica gel sleeve 106 is clamped into the inner base 105 on which the second water filter plate 1023 and the steel gauze 1026 are placed, and the lower side of the flexible silica gel sleeve 106 is fixed by a fixing and sealing steel clamp 1021;
2) putting the cylindrical sample into a flexible silica gel sleeve 106;
3) sleeving a perforated sleeve 107 outside the flexible silica gel sleeve 106 and placing the perforated sleeve on the inner base 105;
4) sleeving the unthreading fixing and sealing steel card 1021 on the upper side of the flexible silica gel sleeve 106;
5) placing a steel gauze 1026 and a first water filtering plate 1022 above the sample, clamping the inner top cover 104 into the flexible silica gel sleeve 106, and screwing the upper fixed steel card 1021;
6) the whole body is placed on the outer base 102, the side wall 103 is sleeved, and the side wall 103 and the perforated sleeve 107 are adjusted to align the lateral sampling port 1017;
7) a screw pipe 1018 is arranged in and screwed with the flexible silica gel sleeve 106 and the threaded interface 1019 on the side wall 103;
8) filling tap water into the confining pressure cavity 1014, covering the outer top cover 101 and fixing the outer top cover and the side wall 103;
9) the liquid inlet channel 108 is connected with a pressure stabilizing output pipe 5 of the self-gravity pressurizing device through a connecting pipe 1028;
10) the first hydraulic connecting pipe 4 of the axial pressure manual pressurizing device is communicated with the hydraulic cavity 306 of the self-gravity pressurizing device, and the second hydraulic connecting pipe 7 of the confining pressure manual pressurizing device is well connected with the confining pressure hole 1015 of the ultrafiltration tester;
11) and injecting the prepared test solution into a liquid storage tank of the axial pressure manual pressurizing device, and injecting tap water into the liquid storage tank of the confining pressure manual pressurizing device to finish the test preparation.
3. And (3) testing:
1) closing the liquid inlet channel 108 of the ultrafiltration tester and the second water stop valve 10 at the confining pressure hole, and respectively applying appropriate pressure to the axial pressure manual pressurizing device and the confining pressure manual pressurizing device;
2) first, slowly opening the second water stop valve 10 at the confining pressure hole 1015, observing the change condition of the confining pressure gauge 1016 at the confining pressure hole, simultaneously slowly opening the liquid inlet channel 108, observing the change condition of the axle pressure gauge 109 at the liquid inlet channel, adjusting the axle pressure and the confining pressure, and ensuring that the reading of the axle pressure gauge 109 at the liquid inlet channel is not more than that of the confining pressure gauge 1016 at the confining pressure hole. When the readings of the shaft pressure gauge and the confining pressure gauge are basically stable, reading the pressure value and recording the time;
3) connecting each side sampling port 1017 and bottom sampling port 1012 with rubber hose, introducing into wide-mouth liquid storage bottle to collect exudate, sampling when the exudate of infusion bottle reaches 20ml, and numbering Yi-j(wherein i ═ 1, 2, 3, 4, which represent three side sampling ports 1017 and bottom sampling ports 1012, respectively, from top to bottom; j ═ 1, 2, 3 ·, which represents the order in which the samples were taken).
4) And performing water chemistry analysis on the prepared test solution and the obtained exudate water sample, and drawing a exudate water quality change curve.
The technical contents not mentioned in the above modes can be realized by adopting or referring to the prior art.
It is intended that all equivalents and obvious modifications made by those skilled in the art in light of the teachings of this specification be within the scope of the invention.
Claims (4)
1. The utility model provides a lateral direction segmentation sample original state clay ultrafiltration test device which characterized in that: the ultrafiltration tester comprises an ultrafiltration tester, wherein the ultrafiltration tester comprises an outer top cover, an outer base and a side wall for connecting the outer top cover and the outer base, the outer top cover, the outer base and the side wall form a closed cavity, an inner top cover, an inner base, a flexible silica gel sleeve for coating an original state soil sample and a porous sleeve are arranged in the closed cavity, the inner top cover is arranged below the outer top cover, a liquid inlet channel communicated with the liquid inlet channel is arranged in the inner top cover and the outer top cover, the liquid inlet channel is externally connected with an axial pressure gauge, the inner base is arranged above the outer base, a water outlet channel is arranged in the inner base, a water storage cavity communicated with the water outlet channel and a bottom sampling port for communicating the water storage cavity with the outside are arranged in the outer base, the inner top cover, the inner base and the flexible silica gel sleeve form an original state soil sample permeation cavity, the porous sleeve is sleeved outside the flexible silica gel sleeve, and, a confining pressure hole communicated with the confining pressure cavity is formed in the side wall, a confining pressure gauge is connected outside the confining pressure hole, a lateral sampling port is arranged at a position corresponding to the side wall, the sleeve with the hole and the flexible silica gel sleeve, a solenoid is arranged at the lateral sampling port, threaded interfaces matched with the solenoid are arranged on the side wall and the flexible silica gel sleeve, and a flexible filter screen is arranged at a position corresponding to the lateral sampling port on the flexible silica gel sleeve; the manual pressurizing device comprises a liquid storage tank, a water pressing well structure for manually pressing out liquid stored in the liquid storage tank is arranged on the liquid storage tank, and a liquid injection port is arranged above one end of the liquid storage tank; the self-gravity pressurizing device comprises a base, a top plate and a bearing plate, wherein a supporting column is arranged between the base and the top plate, the bearing plate is sleeved on the supporting column and can move up and down along the supporting column, a pressure distribution plate is arranged on the bearing plate, a hydraulic cavity is arranged on the base, a pressure guide column is arranged in the hydraulic cavity and is connected with the bearing plate; the device comprises a manual pressurizing device, a first self-gravity pressurizing device, a second self-gravity pressurizing device, a liquid outlet of the manual pressurizing device, a liquid inlet channel, a liquid outlet of the manual pressurizing device, and a confining pressure;
the water pressing well structure comprises a well body and a pressing handle, the well body is of a hollow cylindrical structure, the bottom of the well body is communicated with the lower part of the liquid storage tank through a liquid inlet pipe, a liquid outlet is formed in the upper part of the well body, a piston is arranged in the well body, and the piston is connected with the pressing handle which drives the well body to reciprocate;
the ultrafiltration tester is provided with a plurality of ultrafiltration testers, a tee joint is connected to the liquid inlet channel and the confining pressure hole of each ultrafiltration tester, the tee joints at the liquid inlet channels of all the ultrafiltration testers are communicated with each other, and the tee joints at the confining pressure holes of all the ultrafiltration testers are also communicated with each other.
2. The lateral sectioned sampling undisturbed clay ultrafiltration test device as claimed in claim 1, wherein: the side direction sample connection sets up 2 ~ 5, and is interval arrangement from top to bottom along the lateral wall.
3. The lateral sectioned sampling undisturbed clay ultrafiltration test device as claimed in claim 1, wherein: the bottom surface of interior top cap is equipped with first recess, places first drainage board in first recess, the top surface of interior base is equipped with the second recess, places the second drainage board in the second recess, be equipped with a cavity between inlet channel and the first drainage board, be equipped with end cavity between outlet channel and the second drainage board, be equipped with the steel gauze between the contact surface about drainage board and the original state soil sample.
4. The lateral sectioned sampling undisturbed clay ultrafiltration test device as claimed in claim 1, wherein: interior base and interior top cap contact with the lateral wall through first sealed rubber ring respectively, interior top cap up end contacts with outer top cap through second sealed rubber ring, interior base lower extreme face contacts with outer base through third sealed rubber ring, outer top cap and outer base are through the terminal surface about screw fixation in the lateral wall respectively.
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| CN109115671B (en) * | 2018-10-17 | 2023-10-17 | 中交第一航务工程局有限公司 | Soil body infiltration consolidation device with water cavity and application method thereof |
| CN110687017B (en) * | 2019-09-04 | 2021-09-07 | 中国矿业大学 | Device and method for measuring gas migration characteristic and expansion force of buffer material |
| CN112113891A (en) * | 2020-08-27 | 2020-12-22 | 盐城工学院 | Nested broken rock permeameter with adjustable circumferential infiltration angle |
| CN113109239B (en) * | 2021-05-18 | 2022-10-14 | 江西理工大学 | Improved multifunctional earth pillar penetration experiment device |
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