CN106248479B - Testing device and method for pore water chemical analysis of saturated soil in triaxial or consolidation test process - Google Patents

Testing device and method for pore water chemical analysis of saturated soil in triaxial or consolidation test process Download PDF

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Publication number
CN106248479B
CN106248479B CN201610770845.8A CN201610770845A CN106248479B CN 106248479 B CN106248479 B CN 106248479B CN 201610770845 A CN201610770845 A CN 201610770845A CN 106248479 B CN106248479 B CN 106248479B
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pressure chamber
water quality
consolidation
pressure
triaxial
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CN106248479A (en
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王秀艳
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Institute of Hydrogeology and Environmental Geology CAGS
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Institute of Hydrogeology and Environmental Geology CAGS
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/06Special adaptations of indicating or recording means
    • G01N3/066Special adaptations of indicating or recording means with electrical indicating or recording means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/06Indicating or recording means; Sensing means
    • G01N2203/0617Electrical or magnetic indicating, recording or sensing means

Abstract

The invention discloses a testing device and a method for pore water chemical analysis of saturated soil in a triaxial or consolidation test process, belonging to the field of geotechnical test extended water chemical analysis; comprises a test processing control unit, a collecting and controlling device, a static triaxial or consolidation pressure chamber and a trace water quality analyzer; the test processing control unit is associated with the acquisition controller; the micro water quality analyzer is matched with a water quality analyzer matched host; the micro water quality analyzer is associated with a main machine matched with the water quality analyzer; the trace water tested by the trace water quality analyzer is water released by sample compression; a cylinder is arranged around the static triaxial or consolidation pressure chamber; a sample is arranged at the central position inside the static triaxial or consolidation pressure chamber; the surface of the periphery of the sample is wrapped with a latex film; the invention has great significance for the research on the problems of polluted soil body, the migration of polluted substances in the soil body, pollution treatment and the like, and has stronger practicability and operability.

Description

Testing device and method for pore water chemical analysis of saturated soil in triaxial or consolidation test process
Technical Field
The invention relates to the field of geotechnical test extended water chemistry analysis, in particular to a testing device and a method for pore water chemistry analysis of saturated soil in a triaxial or consolidation test process.
Background
The triaxial test or consolidation test of soil sample belongs to the field of soil mechanics test, mainly tests the mechanical indexes of soil sample in the aspect of sample deformation strength under the action of vertical stress, but the saturated soil sample can release pore water at the same time of the soil sample compression process under the action of vertical stress, its chemical analysis item is more ignored because the release quantity of pore water is limited, and the ion chromatograph or liquid phase water quality analyzer is mainly used for detection of ions of domestic drinking water, natural mineral water and seawater, for example K+、Na+、Ca2+、NH+、Rb+、Cs+、F、SO4 2+、NO2 Trichloroethylene, and the like. The test of the chemical components and the content of the pore water in the soil sample compression process has great significance for the research of the problems of soil body pollution, the migration of pollutants in the soil body, pollution control and the like, the determination of the chemical components and the content of the pore water in the soil sample compression process and related test methods have not been reported in application for administrative protection, but the components and the content of the pore water need to be tested in the current scientific research project, so that a new three-axis or saturated soil pore water chemical component and content in the consolidation test process need to be developedAn analysis apparatus and method.
Disclosure of Invention
The invention aims to provide a testing device and a testing method for the pore water chemical analysis of saturated soil in the triaxial or consolidation test process, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the test device and the method for the pore water chemical analysis of the saturated soil in the triaxial or consolidation test process comprise a test processing control unit, a sampling controller, a static triaxial or consolidation pressure chamber and a trace water quality analyzer; the test processing control unit comprises a computer and geotechnical data processing software; the test processing control unit is associated with the acquisition controller; the collecting and controlling device is associated with a static triaxial or consolidation pressure chamber; the static triaxial or consolidation pressure chamber is associated with a micro water quality analyzer; the micro water quality analyzer is matched with a water quality analyzer matched host; the micro water quality analyzer is associated with a main machine matched with the water quality analyzer; a cylinder is arranged in the static triaxial or consolidation pressure chamber; a sample is arranged in the center of the static triaxial or the consolidation pressure chamber; the top surface of the sample is connected with an upper permeable stone; the bottom surface of the sample is connected with a lower permeable stone; the sample is arranged in the cylinder; the top end of the static triaxial or consolidation pressure chamber is provided with a pressure frame top plate; a fixed block is arranged in the center of the top plate of the pressure frame; upright columns are arranged at the edge positions of the pressure frame top plate and the pressure chamber base.
Further stating the invention, the micro water quality analyzer comprises a water quality sample injector b and a water quality sample injector a; the central position of the water quality sample injector b is connected with a connecting block; the upper side of the upper permeable stone is connected with a sample cap; and an upper pore water outlet pipe is arranged in the central position of the joint of the upper permeable stone and the sample cap.
Further stating the invention, the upper side surface of the sample cap is connected with a pressure lever; the compression bar is a cylinder; the arc side surface of the pressure lever is contacted with the top shell of the pressure chamber; a sealing top cover is arranged in the center of the top surface of the pressure chamber top shell; the pressure rod penetrates through the center of the top shell of the pressure chamber; the pressure rod penetrates through the center of the sealing top cover.
The invention is further stated, a sealing ring is arranged at the joint position of the sealing top cover and the pressure chamber top shell; the pressure rod penetrates through the center of the sealing ring; the top end of the pressure lever is connected with the bottom end of the fixed block; a vertical pressure sensor is arranged in the center of the contact plane of the pressure lever and the fixed block; the data output end of the vertical pressure sensor is connected with the acquisition and control device; and a deformation sensor is arranged on one side of the vertical pressure sensor.
Further stating the invention, the upper surface of the cylinder is connected with the bottom surface of the top shell of the pressure chamber; the bottom surface of the cylinder is connected with a pressure chamber base; the cylinder body is made of high-pressure colorless materials; a boss is arranged in the center of the top surface of the pressure chamber base; the central position of the top surface of the pressure chamber base is connected with the lower permeable stone; a lower pore water outlet pipe is arranged at the position where the top surface of the pressure chamber is contacted with the lower permeable stone; the other end of the lower pore water outlet pipe penetrates through the center of one side of the pressure chamber base; one end of the upper pore water outlet pipe is connected with the side surface of the lower pore water outlet pipe; and the sample inlets of the water quality sample injector a and the water quality sample injector b are inserted into the side surface of the outlet end of the lower pore water outlet pipe.
The invention is further stated, the static triaxial or consolidation pressure chamber is provided with a confining pressure inlet and outlet pipe between the sample and the cylinder; one end of the confining pressure inlet and outlet pipe is arranged on the top surface of the pressure chamber base; the other end of the surrounding pressure inlet and outlet pipe is arranged at the upper part of the central position of the side surface of the pressure chamber base.
The invention is further stated, the test data output end of the static triaxial or consolidation pressure chamber is connected with the data acquisition end of the acquisition and control device; the data output end of the acquisition controller is connected with the detection end of the test processing control unit; the control end of the test processing control unit is connected with the control end of the static triaxial or consolidation pressure chamber; the static triaxial or consolidation pressure chamber, the acquisition controller and the test data processing control unit form a test data feedback chain.
The invention is further stated, the water outlet end of the static triaxial or consolidation pressure chamber is connected with the water quality acquisition end of the trace water quality analyzer; and the trace element data output end of the trace water quality analyzer is connected with the data receiving end of the host matched with the water quality analyzer.
Compared with the prior art, the invention has the beneficial effects that: the static triaxial or consolidation pressure chamber, the acquisition controller and the test processing control unit form a test data feedback chain, a vertical pressure sensor is arranged in the center of a contact plane of a pressure rod and a fixed block, in the process of triaxial or consolidation test, the vertical pressure sensor acquires vertical pressure data of a sample, the vertical pressure sensor transmits the acquired data to the acquisition controller, the acquisition controller transmits the data to the test processing control unit, the test processing control unit analyzes and processes the pressure data, and if the pressure meets the test requirement, the test processing control unit controls the static triaxial or consolidation pressure chamber to stop working, so that the test automation is realized; a trace water quality analyzer is adopted, a water quality sample injector a and a water quality sample injector b are arranged at a water quality acquisition end of the trace water quality analyzer, water of a sample is possibly flowed out from an upper pore water outlet or a lower pore water outlet of the upper part of the sample under pressure in a triaxial or consolidation test process, the water from the upper pore water outlet and the water from the lower pore water outlet can be acquired through the water quality sample injector a and the water quality sample injector b of the trace water quality analyzer, the acquisition of a water quality data source is realized, the total water consumption of the water sample is tested for less than 2ml in one time in the acquisition process, so the pore water released in the test process can be tested for many times, the detection mode is inhibition type conductivity detection, the types of detected ions depend on the trace water quality analyzer and research contents or specially researched contents, the trace water quality analyzer can be directly read by data, and the trace water quality analyzer is associated with a matched host, the species and the content of the ion or compound components in the pore water of the sample can be automatically analyzed, and the species and the detection limit of the water quality analysis are based on the level of the existing trace water quality analyzer.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the present invention.
In the figure: 1. an experiment processing control unit; 2. a controller is adopted; 3. a column; 4. a trace water quality analyzer; 5. a water quality analyzer matching host; 6. a pressure lever; 7. sealing the top cover; 8. a seal ring; 9. a vertical pressure sensor; 10. a pressure chamber top shell; 11. a barrel; 12. a pressure frame top plate; 13. an upper pore water outlet pipe; 14. a pressure chamber base; 15. a pressure head; 16. surrounding and pressing the inlet pipe and the outlet pipe; 17. a lower pore water outlet pipe; 18. a water quality sample injector a; 19. a water quality sample injector b; 20. a fixed block; 21. a joining block; 22. a sample; 23. coating a permeable stone; 24. laying permeable stones; 25. a static triaxial or consolidation pressure chamber; 26. a deformation sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: comprises a test processing control unit 1, an acquisition and control device 2, a static triaxial or consolidation pressure chamber 25 and a trace water quality analyzer 4; the test processing control unit 1 comprises a computer and geotechnical data processing software; the test processing control unit 1 is associated with a collecting controller 2; the collecting and controlling device 2 is associated with a static triaxial or consolidation pressure chamber 25; the static triaxial or consolidation pressure chamber 25 is associated with the micro water quality analyzer 4; the micro water quality analyzer 4 is matched with a water quality analyzer matching host 5; the micro water quality analyzer 4 is associated with a water quality analyzer matching host 5; the cylinder body 11 is arranged in the static triaxial or consolidation pressure chamber 25; a sample 22 is arranged in the center of the static triaxial or consolidation pressure chamber 25; the top surface of the sample 22 is connected with an upper permeable stone 23; the bottom surface of the sample 22 is connected with a lower permeable stone 24; the sample 22 is arranged inside the cylinder 11; the top end of the static triaxial or consolidation pressure chamber 25 is provided with a pressure frame top plate 12; a fixed block 20 is arranged in the center of the pressure frame top plate 12; the upright posts 3 are arranged at the edge positions of the pressure frame top plate 12 and the pressure chamber base 14; the micro water quality analyzer 4 comprises a water quality sample injector b19 and a water quality sample injector a 18; the central position of the water quality sample injector b19 is connected with a connection block 21; the upper side of the upper permeable stone 23 is connected with a sample cap 15; an upper pore water outlet pipe 13 is arranged at the central position of the joint of the upper permeable stone 23 and the sample cap 15; the upper side surface of the sample cap 15 is connected with a pressure lever 6; the compression bar 6 is a cylinder; the arc side surface of the pressure lever 6 is contacted with the pressure chamber top shell 10; a sealing top cover 7 is arranged at the center of the top surface of the pressure chamber top shell 10; the pressure rod 6 penetrates through the center of the pressure chamber top shell 10; the pressure rod 6 penetrates through the center of the sealing top cover 7; a sealing ring 8 is arranged at the joint position of the sealing top cover 7 and the pressure chamber top shell 10; the pressure rod 6 penetrates through the center of the sealing ring 8; the top end of the pressure lever 6 is connected with the bottom end of the fixed block 20; a vertical pressure sensor 9 is arranged at the center of the contact plane of the pressure lever 6 and the fixed block 20; the data output end of the vertical pressure sensor 9 is connected with the acquisition and control device 2; a deformation sensor 26 is arranged on one side of the vertical pressure sensor 9; the upper side surface of the cylinder body 11 is connected with the bottom surface of the pressure chamber top shell 10; the bottom surface of the cylinder 11 is connected with a pressure chamber base 14; the cylinder body 11 is made of high-pressure colorless materials; a boss is arranged in the center of the top surface of the pressure chamber base 14; the central position of the top surface of the pressure chamber base 14 is connected with a lower permeable stone 24; a lower pore water outlet pipe 17 is arranged at the contact position of the top surface of the pressure chamber and the lower permeable stone 24; the other end of the lower pore water outlet pipe 17 passes through the central position of one side of the pressure chamber base 14; one end of the upper pore water outlet pipe 13 is connected with the side surface of the lower pore water outlet pipe 17; the sample inlets of the water quality sample injector a18 and the water quality sample injector b19 are inserted into the side surface of the outlet end of the lower pore water outlet pipe 17; the static triaxial or consolidation pressure chamber 25 is provided with a surrounding pressure inlet and outlet pipe 16 at a position between the sample 22 and the cylinder 11; one end of the confining pressure inlet and outlet pipe 16 is arranged on the top surface of the pressure chamber base 14; the other end of the confining pressure inlet and outlet pipe 16 is arranged at the upper part of the central position of the side surface of the pressure chamber base 14; the test data output end of the static triaxial or consolidation pressure chamber 25 is connected with the data acquisition end of the acquisition and control device 2; the data output end of the acquisition controller 2 is connected with the detection end of the test processing control unit 1; the control end of the test processing control unit 1 is connected with the control end of a static triaxial or consolidation pressure chamber 25; the static triaxial or consolidation pressure chamber 25, the acquisition controller 2 and the test data processing control unit 1 form a test data feedback chain; the water outlet end of the static triaxial or consolidation pressure chamber 25 is connected with the water quality acquisition end of the trace water quality analyzer 4; and the trace element data output end of the trace water quality analyzer 4 is connected with the data receiving end of the water quality analyzer matching host 5.
In the specific implementation of the invention, a static triaxial or consolidation pressure chamber 25, an acquisition controller 2 and a test processing control unit 1 form a test data feedback chain, a vertical pressure sensor 9 is arranged at the central position of the contact plane of a pressure rod 6 and a fixed block 20, in the triaxial or consolidation test process, the vertical pressure sensor 9 acquires vertical pressure data on a sample 22, the vertical pressure sensor 9 transmits the acquired data to the acquisition controller 2, the acquisition controller 2 transmits the data to the test processing control unit 1, the test processing control unit 1 analyzes and processes the pressure data, and if the pressure meets the test requirement, the test processing control unit 1 controls the static triaxial or consolidation pressure chamber 25 to stop working, so that the automation of the test is realized; the water quality collecting end of the micro water quality analyzer 4 is provided with a water quality sample injector a18 and a water quality sample injector b19, in the process of triaxial or consolidation test, the water of the sample 22 may flow out from the upper pore water outlet or the lower pore water outlet of the upper part of the sample 22 under the pressure, the water quality sampling tube 19, the water quality sample injector a18 and the water quality sample injector b19 of the micro water quality analyzer 4 can collect the water at the upper pore water outlet and the water at the lower pore water outlet, so as to realize the collection of the water quality data source, the total water consumption of the sample 22 is tested by one time in the collecting process, so the pore water released in the test process can be tested for many times, the micro water quality analyzer 4 is associated with the host 5 matched with the water quality analyzer, and the types and the contents of ions or compounds in the water quality can be automatically analyzed, the multifunctional integration of the analysis of the water quality of the trace water is really realized, and the method has great significance for the research on the problems of the influence of pollutants on the underground water, pollution treatment and the like in the soil compaction process caused by the pollution of the soil body, the migration of pollutants in the soil body, the exploitation of the underground water and the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. In addition, the invention obtains the national science fund project: research (No: 41272301) of recognition method of groundwater critical mining water level and institute of Chinese geological academy: the development of a multi-field coupling type high-voltage triaxial test system (No: YYWF201628) is supported.

Claims (7)

1. Test device of the pore water chemical analysis of saturated soil in triaxial or consolidation test process, its characterized in that: comprises a test processing control unit (1), a collecting and controlling device (2), a static triaxial or consolidation pressure chamber (25) and a trace water quality analyzer (4); the test processing control unit (1) comprises a computer and geotechnical data processing software; the test processing control unit (1) is associated with the acquisition controller (2); the collecting and controlling device (2) is associated with a static triaxial or consolidation pressure chamber (25); the static triaxial or consolidation pressure chamber (25) is associated with the micro water quality analyzer (4); the micro water quality analyzer (4) is matched with a water quality analyzer matching host (5); the micro water quality analyzer (4) is associated with a water quality analyzer matching host (5); a cylinder body (11) is arranged in the static triaxial or consolidation pressure chamber (25); a sample (22) is arranged in the center of the interior of the static triaxial or consolidation pressure chamber (25); the top surface of the sample (22) is connected with an upper permeable stone (23); the bottom surface of the sample (22) is connected with a lower permeable stone (24); the sample (22) is arranged in the cylinder (11); the top end of the static triaxial or consolidation pressure chamber (25) is provided with a pressure frame top plate (12); a fixed block (20) is arranged in the center of the pressure frame top plate (12); upright posts (3) are arranged at the edge positions of the pressure frame top plate (12) and the pressure chamber base (14);
the micro water quality analyzer (4) comprises a water quality sample injector b (19) and a water quality sample injector a (18); the central position of the water quality sample injector b (19) is connected with a connecting block (21); the upper side of the upper permeable stone (23) is connected with a sample cap (15); an upper pore water outlet pipe (13) is arranged at the central position of the joint of the upper permeable stone (23) and the sample cap (15).
2. The apparatus for testing the pore water chemistry analysis of saturated soils during triaxial or consolidation testing according to claim 1, wherein: the upper side surface of the sample cap (15) is connected with a pressure lever (6); the pressure lever (6) is a cylinder; the arc side surface of the pressure lever (6) is contacted with the top shell (10) of the pressure chamber; a sealing top cover (7) is arranged at the center of the top surface of the pressure chamber top shell (10); the pressure lever (6) passes through the center of the pressure chamber top shell (10); the pressure lever (6) passes through the center of the sealing top cover (7).
3. The apparatus for testing the pore water chemistry analysis of saturated soils during triaxial or consolidation testing according to claim 2, wherein; a sealing ring (8) is arranged at the joint position of the sealing top cover (7) and the pressure chamber top shell (10); the pressure lever (6) penetrates through the center of the sealing ring (8); the top end of the pressure lever (6) is connected with the bottom end of the fixed block (20); a vertical pressure sensor (9) is arranged in the center of the contact plane of the pressure lever (6) and the fixed block (20); the data output end of the vertical pressure sensor (9) is connected with the acquisition and control device (2); and a deformation sensor (26) is arranged on one side of the vertical pressure sensor (9).
4. The apparatus for testing the pore water chemistry analysis of saturated soils during triaxial or consolidation testing according to claim 1, wherein: the upper side surface of the cylinder body (11) is connected with the bottom surface of the pressure chamber top shell (10); the bottom surface of the cylinder body (11) is connected with a pressure chamber base (14); the cylinder body (11) is made of high-pressure colorless materials; a boss is arranged at the center of the top surface of the pressure chamber base (14); the central position of the top surface of the pressure chamber base (14) is connected with a lower permeable stone (24); a lower pore water outlet pipe (17) is arranged at the position where the top surface of the pressure chamber base (14) is contacted with the lower permeable stone (24); the other end of the lower pore water outlet pipe (17) passes through the central position of one side of the pressure chamber base (14); one end of the upper pore water outlet pipe (13) is connected with the side surface of the lower pore water outlet pipe (17); and the sample inlets of the water quality sample injector a (18) and the water quality sample injector b (19) are inserted into the side surface of the outlet end of the lower pore water outlet pipe (17).
5. The apparatus for testing the pore water chemical analysis of saturated soil during triaxial or consolidation testing according to claim 1 or 4, wherein: a surrounding pressure inlet and outlet pipe (16) is arranged between the sample (22) and the cylinder body (11) in the static triaxial or consolidation pressure chamber (25); one end of the confining pressure inlet and outlet pipe (16) is arranged on the top surface of the pressure chamber base (14); the other end of the pressure enclosing inlet and outlet pipe (16) is arranged at the upper part of the central position of the side surface of the pressure chamber base (14).
6. The apparatus for testing the pore water chemistry analysis of saturated soils during triaxial or consolidation testing according to claim 1, wherein: the test data output end of the static triaxial or consolidation pressure chamber (25) is connected with the data acquisition end of the acquisition and control device (2); the data output end of the acquisition and control device (2) is connected with the detection end of the test processing control unit (1); the control end of the test processing control unit (1) is connected with the control end of a static triaxial or consolidation pressure chamber (25); the static triaxial or consolidation pressure chamber (25), the acquisition controller (2) and the test data processing control unit (1) form a test data feedback chain.
7. The apparatus for testing the pore water chemistry analysis of saturated soils during triaxial or consolidation testing according to claim 1, wherein: the water outlet end of the static triaxial or consolidation pressure chamber (25) is connected with the water quality acquisition end of the trace water quality analyzer (4); and the trace element data output end of the trace water quality analyzer (4) is connected with the data receiving end of the water quality analyzer matching host (5).
CN201610770845.8A 2016-08-31 2016-08-31 Testing device and method for pore water chemical analysis of saturated soil in triaxial or consolidation test process Active CN106248479B (en)

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