CN104407387A - Multifunctional test device and method for measuring induced polarization effect of water-containing sand sample - Google Patents
Multifunctional test device and method for measuring induced polarization effect of water-containing sand sample Download PDFInfo
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- CN104407387A CN104407387A CN201410720421.1A CN201410720421A CN104407387A CN 104407387 A CN104407387 A CN 104407387A CN 201410720421 A CN201410720421 A CN 201410720421A CN 104407387 A CN104407387 A CN 104407387A
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Abstract
The invention discloses a multifunctional test device and a multifunctional test method for measuring the induced polarization effect of a water-containing sand sample. The multifunctional test device comprises two electrolysis chambers and a test sample chamber, wherein the test sample chamber is positioned between the two electrolysis chambers, and each of the electrolysis chambers is isolated from the test sample chamber through a permeation plate capable of adjusting a permeation parameter; test electrode systems for finishing an induced polarization effect test of the water-containing sand sample under a flowing water condition are mounted in the electrolysis chambers; under the action of a rotating device, the test sample chamber drives a test sample to rotate so as to realize automatic stirring, and the upper part of the test sample chamber is connected with a flowing water device through a connection hole; the flowing water device is used for simulating flowing water by respectively controlling a water amount and a water level in the sand sample in a test process.
Description
Technical field
The present invention relates to a kind of effect of induced polarization proving installation and method of the moisture sand sample under Different factor controls, under especially can realizing river channels, the effect of induced polarization of moisture sand sample sample is measured.
Background technology
Induced polarization ratio juris finds metal according to the effect of induced polarization of rock, ore and solves one group of electrical prospecting method of the problems such as hydrogeology, engineering geology.It is divided into again direct-current induced polarization method (time domain method) and alternating induced polarization (frequency domain method).In charging and discharging process, due to the additional electric field phenomenon of this slowly change in time that electrochemical action causes, be called effect of induced polarization (IP effect), induced polarization method is for material base with the difference of the sharp electrical effect of different rock and ore, electrical effect is swashed, with a kind of method of exploration of Underground geological condition by observing and studying the earth.For geophysical exploration, the detection of the water yield is an insoluble difficult problem all the time, scholar is had to attempt adopting induced polarization method to carry out the detection of the water yield in recent years, make some progress, but the mechanism that induced polarization is used for water yield detection is still unclear, constrains the development of induced polarization exploration water yield method greatly.
For the research of induced polarization exploration water yield mechanism, being tested by the effect of induced polarization of moisture sand sample is a kind of effective research method, and the proving installation of effect of induced polarization is the key problem being related to effect of induced polarization measurement, therefore, Many researchers proposes different effect of induced polarization proving installations.Such as: Wang Hongjian, Tong Maosong utilize in the experimental study of induced polarization determination dirty sandstone permeability, select square tank as experimental provision, core is as sample, left and right Liang Ge solution chamber is divided into gripper core and by tank, electrode directly immerses in electrolytic solution, and electrolytic solution directly contacts with core and tests simultaneously; Jiang Yubing, in the experimental study and theoretical analysis of rock induced polarization phenomenon, selects airtight container, is sealed in container by electrode, core sample, preventing electrolytic solution from exosmosing through core, passing into electric current test by peripheral hardware by carrying out pressurization to sample; The electric conductivity of Li Jin inscription water pollutions electrically and in several experimental results of pollution concentration variation relation selects rectangle organic glass groove as test unit with swashing, electrode is directly put into glass guide channel to contact with solution, this test unit verifies for the correlation parameter of water pollutions simultaneously.As can be seen from the experimental provision of above several research induced polarization principle, existing most of experimental provision is tested for core, and moisture sand sample and core have larger difference, because the infiltration coefficient of moisture sand sample is large, test solution is easy to enter sand sample and cause test result inaccurate, makes the device for core test can not be used for the effect of induced polarization test of moisture sand sample; Existing test unit is mostly comparatively simple in addition, and operation inconvenience, efficiency are lower, and what is more important does not consider the test of the effect of induced polarization of sand sample under river channels.
For the present invention, be that the effect of induced polarization realizing moisture sand sample under many kinds of parameters controls is measured, especially measure the effect of induced polarization of sand sample under river channels and improve test efficiency, effect of induced polarization measurement mechanism faces a following difficult problem:
(1) how to ensure in process of the test that moisture sand sample and test solution room separate, can ensure that the conducting of electric current does not make again solution too much flow into moisture sand sample, thus affect test result;
(2) configure different water cut, clay content sand sample time, how to make moisture sand sample mix fast, improve the stability of test result;
(3) realize the regulation and control of moisture sand sample water level inside and directed flow under how carrying out river channels, thus under realizing river channels, the effect of induced polarization of moisture sand sample is tested.
Summary of the invention
The present invention relates to a kind of effect of induced polarization proving installation of the moisture sand sample under Different factor controls, under especially can realizing river channels, the effect of induced polarization of moisture sand sample sample is measured.The testing experiment of core mainly only can be carried out in order to solve existing induced polarization device, the testing experiment of sample under river channels can not be carried out, and the problem of operation inconvenience, inefficiency, a kind of effect of induced polarization measurement mechanism of sample under the many kinds of parameters such as different salinity, factor of porosity, clay content and water percentage is provided, the effect of induced polarization that can realize rock sample and loose sand sample is tested, important can be implemented in river channels under the effect of induced polarization of moisture sand sample measure.
The present invention solves its technical matters to be solved by the following technical solutions:
The present invention is in different salinity, factor of porosity, the effect of induced polarization measurement mechanism of sample under the many kinds of parameters such as clay content and water percentage, comprise two closed tank rooms and a closed sample chamber, described sample chamber is positioned in the middle of two tank rooms, and by the infiltration plate isolation of an adjustment permeability parameters between tank room and sample chamber, the test electrode system of the effect of induced polarization test of moisture sand sample has been installed in described tank room, described sample chamber rotates along horizontal axis under whirligig effect, and then drive sample to rotate the automatic stirring realizing sample, and described sample chamber is connected with pressure control device respectively with tank room.
Above-mentioned sample chamber and two tank rooms are cylindrical, and three cylinders are all horizontally disposed with, and are linked together by abutment ring between connected cylinder, and each other by the isolation of infiltration plate, described sample chamber rotates along horizontal line.
Described electrolysis indoor storage saturated solution, and test electrode system is installed, test electrode system comprises electrodes of A, B, potential electrode M, N, wherein transmitting electrode makes the plectane equal with tank room cross-sectional sizes by stereotype, potential electrode adopts Ag/AgCl contrast electrode, and wherein transmitting electrode is arranged on the inner side of tank room lateral wall, and potential electrode is arranged on the inner side of tank room madial wall.
Described sample chamber filling test sample, the test can carrying out core especially can carry out the effect of induced polarization testing experiment of moisture sand sample.
The both sides of described sample chamber are provided with the infiltration plate of adjustable permeability parameters, can ensure the contact of solution in moisture sand sample and tank room and conduction test electric current, solution in tank room can be avoided again too much to flow into moisture sand sample and affect measuring accuracy simultaneously.Sample chamber two ends outer wall is provided with driven gear, is connected with whirligig, and the robotization that can realize moisture sand sample in sample chamber is stirred.
Described pressure control device is the vacuum pump for Control Assay room and tank room pressure, and described vacuum pump conduit is connected with the top of sample chamber with two tank rooms respectively through valve, tensimeter.
Described infiltration plate is a kind of infiltration plate that can adjust permeability parameters, formulated by flyash, cement, wood chip, water, its mass ratio is 1:0.2:0.1:0.15, cement adds the intensity of infiltration plate, wood chip adds the permeability of infiltration plate, realize the current lead-through of tank room and sample chamber, and the solution in tank room is exceeded penetrate in sample chamber, thus solve the problem that conventional test device cannot carry out the test of moisture sand sample effect of induced polarization.
Described whirligig comprises motor, driven wheel and driven gear, wherein driven wheel is fixedly mounted on abutment ring, and engage each other with driven gear, driven gear is fixedly connected on the two ends of sample chamber, by the break-make of motor, controls the rotation of driven wheel, and then the rotation of Control Assay room, by the rotation of sample chamber, coordinate vacuum pump to be vacuumized by sample chamber, the sand sample that can realize in sample chamber mixes with clay, water etc.; Thus improve test figure accuracy.When carrying out the testing experiment of moisture sand sample under the parameter such as different water cut, clay content, adopt whirligig to realize robotization and stir, greatly improve work efficiency.
The described multipurpose test system measured for moisture sand sample effect of induced polarization, also comprise dynamic water device, described dynamic water device is communicated with sample chamber inside by connecting hole, realize controlling the water yield in sand sample and water level respectively by the water yield controlled in dynamic water device in process of the test, and then the dynamic water of simulation.
Described dynamic water device comprises the tank of 2 Control Assay room water yields; 2 described tanks to be arranged on respectively above sample chamber and to be communicated with sample chamber.
Proving installation described in utilization carries out the method for testing of salinity, factor of porosity, clay content, supply current parameter, as follows:
(1), device installs and electrode, sand sample lay filling, specific as follows:
First, electrolytic solution and sand sample is prepared; Secondly, transmitting electrode and potential electrode are arranged on tank room, left side tank room is connected with abutment ring side, infiltration plate, whirligig are settled successively, opposite side and the mounted side of abutment ring are stitched together, put into by the sand sample configured in the sample chamber be connected with driven gear, right side tank room is installed identical with above-mentioned installation steps; Finally, inject electrolytic solution by the aperture above tank room, motor is connected with whirligig, lays vacuum pump;
(2) zwitterion contained in the solution (or water) that the salinity of sand sample refers in sand sample, when preparing different salinity sand samples, the solution chosen containing KCl, GaCl2, FeCl3 of equivalent joins in sand sample, then joins in sample chamber;
(3) after preliminary work completes, open and the valve of three on vacuum pump connecting duct, start vacuum pump to be evacuated in sample chamber and tank room, after vacuumizing end, close three valves, actuating motor drives driven wheel rotating disk to make sample chamber Rotating with Uniform, stop motor after a few minutes, and controlled pressure valve slowly pressurizes to sample chamber, viewing panel board is when internal pressure is equal with external pressure, stop pressurization, test;
(4) factor of porosity of sand sample changes the different aperture degree of sand sample by the particle diameter changing sand sample self, after being encased in sample chamber, repeats step (3) after sand sample sample preparation completes;
(5) clay content of sand sample is by adding the clay content that quantitative clay changes sand sample in sand sample, after being encased in sample chamber, repeats step (3) after sand sample sample preparation completes;
(6) supply current of sand sample is the supply current changing sand sample by changing supply voltage, chooses 12V, 24V, 36V and tests respectively;
(7) off-test, stops motor, vacuum pump, and dismounting experimental provision also carries out cleaning for testing ready next time.
Proving installation described in utilization carries out the method for testing of dynamic water parameter, as follows:
(1), device installs and electrode, sand sample lay filling, and implementation step is: first, preparation electrolytic solution and sand sample; Secondly, transmitting electrode and potential electrode are arranged on tank room, left side tank room is connected with abutment ring side, infiltration plate, whirligig are settled successively, opposite side and the mounted side of abutment ring are stitched together, put into by the sand sample configured in the sample chamber be connected with whirligig, right side tank room is installed identical with above-mentioned installation steps; Finally, inject electrolytic solution by the aperture above tank room, motor is connected with whirligig, lays vacuum pump and tank;
(2) the liquid level difference by changing tank when the dynamic water of sand sample is tested realizes the directed flow of water in sand sample sample, is realized the control of sand sample sample middle water level height by vacuum pump;
(3) after preliminary work completes, the device setting before testing; First, the sand sample sample configured is encased in sample chamber, connect vacuum pump, motor, tank, and the valve controlling tank is shut and injected the water of inequality at both sides tank respectively, form water-head, and the tank water filling continued when testing and starting high water stage, to keep its water level constant, thus control the flow velocity of dynamic water in sand sample sample; Secondly, the valve opening tank makes the water in tank at the flows by action of water-head through sand sample sample, along with the water yield in sample chamber constantly increases, its water level constantly rises, now only open the valve with vacuum pump junction, start vacuum pump, control vacuum pump constantly to sample chamber pressurization, make the position that the water lev el control in sample chamber is being specified; Carry out the test of dynamic water parameter;
(4) height of controlling water level and flow velocity, carries out the dynamic water test in multiple situation;
(5) off-test, closes water tank valve, stops motor, and dismantling experimental provision and carrying out cleaning is that test next time is ready.
The course of work of the present invention is as follows:
Installation test device, sand sample is loaded sample chamber, add respectively and account for sand sample quality 3%, 6%, 10%, the clay of 15%, open and the valve of three on vacuum pump connecting duct, with vacuum pump, sample chamber is vacuumized, actuating motor drives driven wheel to drive driven gear to make sample chamber uniform rotation, motor is stopped after 5 minutes, add again and account for sand sample quality 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 24%, 28%, the distilled water of 32%, again sample chamber is vacuumized, actuating motor makes sample chamber uniform rotation, motor is stopped after 10 minutes, gradually normal atmosphere (An) is forced into sample chamber, finally make sand sample, clay, water mixes,
2 tanks being arranged on same position are equipped with the different water measured respectively, owing to there is water-head, therefore, water can be left to low-water level place from high water stage through sand sample, realize the dynamic water phenomenon in sand sample, simultaneously by the water yield of change two tanks, the water flow velocity flowing through sand sample is changed, because the water in sand sample constantly upwards can accumulate along with the flowing of water, study to move water induced polarization response to different water level sand sample, voltage-controlled mode is adopted to control, namely vacuum pump is through operation valve, tensimeter, be connected with sample chamber by conduit, sample chamber is pressurizeed, owing to joining the air-flow in sample chamber, can spread from sample chamber top to two ends, and just can continue when making the pressure drop of same layer equal to move downward, next lamination is made to fall increase, just because of this principle, the water level controlled in sand sample by pressurizeing is high, solve the difficult problem that conventional test device cannot simulate dynamic water, thus the effect of induced polarization test of moisture sand sample under river channels can be realized.
Beneficial effect of the present invention:
(1) the present invention proposes a kind of effect of induced polarization measurement mechanism can measuring sample different salinity, factor of porosity, clay content and water percentage, be adapted to conventional core and measure.By a kind of infiltration plate of adjustable permeability parameters, realize the induced polarization response measurement of moisture sand sample, breach conventional measurement devices and be only applicable to the limitation that core measures, permeate the precision that characteristic that plate realizes current lead-through and blocking solution seepage flow improves measurement simultaneously.
(2) the present invention proposes the test unit that a kind of moisture sand sample moves water test, by controlling the water yield and water level in moisture sand sample, realizing the effect of induced polarization test under river channels, solving the difficult problem that normal experiment device cannot simulate dynamic water simultaneously.
(3) the present invention proposes a kind of whirligig of sample automatic stirring, realize the measurement of the effect of induced polarization of moisture sand sample under different parameters, change the artificial stirring of sample in conventional equipment, increase work efficiency.
Accompanying drawing explanation
Fig. 1 is a kind of multipurpose test system schematic diagram measured for moisture sand sample effect of induced polarization of the present invention;
Fig. 2 is infiltration plate structure schematic diagram of the present invention;
Fig. 3 (a)-Fig. 3 (b) is rotary device structure schematic diagram of the present invention;
Fig. 4 is the structural representation that the present invention moves water Experiment Parameter;
In figure: 1. electrodes of A, B, 2. tank room, 3. potential electrode M, N, 4. permeate plate, 5. sample chamber, 6. motor, 7. vacuum pump, 8. tank, 9. whirligig, 10. driven gear, 11. driven wheels, 12. abutment rings.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
As shown in Figure 1, for a kind of multipurpose test system schematic diagram tested salinity, factor of porosity, clay content, supply current and dynamic water etc. and measure for moisture sand sample effect of induced polarization of the present invention, the effect of induced polarization that can realize rock sample and loose sand sample is tested, important can be implemented in river channels under the effect of induced polarization of moisture sand sample measure.Whole device comprises transmitting electrode 1, potential electrode 2, tank room 2, sample chamber 5, infiltration plate 4, motor 6, vacuum pump 7, tank 8, whirligig 9.
Above-mentioned sample chamber and two tank rooms are cylindrical, and three cylinders are all horizontally disposed with, and are linked together by abutment ring between connected cylinder, and each other by the isolation of infiltration plate, described sample chamber rotates along horizontal line.
Described test unit adopts transparent organic glass to be made, and its shape is the cylindrical structural of radius 5cm, long 60cm, and be divided into left and right tank room 2 and sample chamber 5, its length is respectively 10cm, 40cm, 10cm from left to right.
Described transmitting electrode 1, potential electrode 3 adopt stereotype electrode and Ag/AgCl contrast electrode respectively, stereotype electrode fabrication becomes and the equal-sized plectane of device section, stereotype has good electric conductivity on the one hand, transmitting electrode can be made use, increase the surface area of electrode on the other hand, improve the contact area of electrode and solution; Ag/AgCl contrast electrode has good stability, and the little <1mv of its extreme difference current potential, and 24 hours extreme differences drift about little <0.1mv.
Described whirligig 9, comprises driven gear 10, driven wheel 11, abutment ring 12.Spliced by tooth between driven gear 10 and driven wheel 11, driven wheel 11 is driven by motor 6 and is fixed on abutment ring 12, driven gear is fixed on sample chamber both sides, during test, during motor running, drive driven wheel 11, driven wheel 11 drives driven gear 10, makes sample chamber 5 uniform rotation.
Described abutment ring 12, is docked by two parts and forms.
As shown in Figure 2, infiltration plate 4 is a kind of infiltration plates that can adjust permeability parameters, be mainly flyash by quality proportioning: cement: wood chip: water is by the porous permeable version of the proportions of=1:0.2:0.1:0.15, meet in the present invention the requirement of permeating plate, electric current is made to feed sample, the solution be unlikely to again in tank room too much penetrates in sample chamber, affects the measuring accuracy of induced polarization.
Whirligig 9 as shown in Figure 3, comprises driven gear 10, driven wheel 11, abutment ring 12.Whirligig 9 is when carrying out sand sample Homogeneous phase mixing, when sample chamber 5 vacuumizes by vacuum pump 7, when motor 6 drives driven wheel 11, forces driven gear 10 uniform rotation, thus drives sample chamber uniform rotation, make sand sample sample mix even.
Dynamic water parameter experiment structure as shown in Figure 4, tank 8 is equipped with the different water yield respectively, produces water-head, flow rate of water flow in Control Assay room 5, realizes flow rate of water flow and controls.Control vacuum pump 7 pairs of sample chambers 5 by operation valve during experiment to pressurize, make water level in sample chamber 5 rise to certain position and remain unchanged, realize the control of water level.
The course of work of the present invention is as follows:
Installation test device, sand sample is loaded sample chamber, add respectively and account for sand sample quality 3%, 6%, 10%, the clay of 15%, open and the valve of three on vacuum pump connecting duct, with vacuum pump, sample chamber is vacuumized, actuating motor drives driven wheel to drive driven gear to make sample chamber uniform rotation, motor is stopped after 5 minutes, add again and account for sand sample quality 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 24%, 28%, the distilled water of 32%, again sample chamber is vacuumized, actuating motor makes sample chamber uniform rotation, motor is stopped after 10 minutes, gradually normal atmosphere (An) is forced into sample chamber, finally make sand sample, clay, water mixes,
2 tanks being arranged on same position are equipped with the different water measured respectively, owing to there is water-head, therefore, water can be left to low-water level place from high water stage through sand sample, realize the dynamic water phenomenon in sand sample, simultaneously by the water yield of change two tanks, the water flow velocity flowing through sand sample is changed, because the water in sand sample constantly upwards can accumulate along with the flowing of water, study to move water induced polarization response to different water level sand sample, voltage-controlled mode is adopted to control, namely vacuum pump is through operation valve, tensimeter, be connected with sample chamber by conduit, sample chamber is pressurizeed, owing to joining the air-flow in sample chamber, can spread from sample chamber top to two ends, and just can continue when making the pressure drop of same layer equal to move downward, next lamination is made to fall increase, just because of this principle, the water level controlled in sand sample by pressurizeing is high, solve the difficult problem that conventional test device cannot simulate dynamic water, thus the effect of induced polarization test of moisture sand sample under river channels can be realized.
The concrete steps of experimental implementation:
1, the testing procedure of salinity, factor of porosity, clay content, supply current parameter:
(1), device installs and electrode, sand sample lay filling, and implementation step is: first, preparation electrolytic solution and sand sample; Secondly, transmitting electrode 1 and potential electrode 3 are arranged on tank room 2, left side tank room 2 is connected with abutment ring 12 side, infiltration plate 4, whirligig 9 are settled successively, opposite side and the mounted side of abutment ring 12 are stitched together, put into by the sand sample configured in the sample chamber 5 be connected with driven gear 10, right side tank room 2 is installed identical with above-mentioned installation steps; Finally, inject electrolytic solution by the aperture above tank room 2, motor 6 is connected with whirligig 9, lay vacuum pump 7 and tank 8.
(2) zwitterion contained in the solution (or water) that the salinity of sand sample refers in sand sample, when preparing different salinity sand samples, the solution chosen containing KCl, GaCl2, FeCl3 of equivalent joins in sand sample, then joins in sample chamber 5.
(3) after preliminary work completes, by supravasal three valve opens be connected with vacuum pump, start vacuum pump 7 to be evacuated in sample chamber and two tank rooms, find time after end, actuating motor 6 drives driven wheel rotating disk 11 to make sample chamber 4 Rotating with Uniform, stops motor 6 after 3-5 minute, and controlled pressure valve slowly pressurizes to sample chamber 5, viewing panel board, when internal pressure is equal with external pressure, stops pressurization, tests.
(4) factor of porosity of sand sample changes the different aperture degree of sand sample by the particle diameter changing sand sample self, after being encased in sample chamber 5, repeats step (3) after sand sample sample preparation completes.
(5) clay content of sand sample is by adding the clay content that quantitative clay changes sand sample in sand sample, after being encased in sample chamber 5, repeats step (3) after sand sample sample preparation completes.
(6) supply current of sand sample is the supply current changing sand sample by changing supply voltage, chooses 12V, 24V, 36V and tests respectively.
(7) off-test, stops motor 6, vacuum pump 7, and dismounting experimental provision also carries out cleaning for testing ready next time.
2, the testing procedure of dynamic water parameter:
(1), device installs and electrode, sand sample lay filling, and implementation step is: first, preparation electrolytic solution and sand sample; Secondly, transmitting electrode 1 and potential electrode 3 are arranged on tank room 2, left side tank room 2 is connected with abutment ring 12 side, infiltration plate 4, whirligig 9 are settled successively, opposite side and the mounted side of abutment ring 12 are stitched together, put into by the sand sample configured in the sample chamber 5 be connected with whirligig, right side tank room 2 is installed identical with above-mentioned installation steps; Finally, inject electrolytic solution by the aperture above tank room 2, motor 6 is connected with whirligig 9, lay vacuum pump 7 and tank 8.
(2) the liquid level difference by changing tank 8 when the dynamic water of sand sample is tested realizes the directed flow of water in sand sample sample, is realized the control of sand sample sample middle water level height by vacuum pump 7.
(3) after preliminary work completes, the device setting before testing.First, the sand sample sample configured is encased in sample chamber 5, connect vacuum pump 7, motor 6, tank 8, and the valve controlling tank 8 is shut and injected the water of inequality at both sides tank 8 respectively, form water-head, and tank 8 water filling continued when testing and starting high water stage, to keep its water level constant, thus control the flow velocity of dynamic water in sand sample sample.Secondly, the valve opening tank 8 makes the water in tank at the flows by action of water-head through sand sample sample, along with the water yield in sample chamber 5 constantly increases, its water level constantly rises, now only open the valve with bonding in vacuum, start vacuum pump 7, control vacuum pump 7 and constantly sample chamber 5 is pressurizeed, make the position that the water lev el control in sample chamber 5 is being specified.Carry out the test of dynamic water parameter.
(4) height of controlling water level and flow velocity, carries out the dynamic water test in multiple situation.
(5) off-test, closes tank 8 valve, stops motor 6, and dismantling experimental provision and carrying out cleaning is that test next time is ready.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. for the multipurpose test system of moisture sand sample effect of induced polarization measurement, it is characterized in that: comprise two closed tank rooms and a closed sample chamber, described sample chamber is positioned in the middle of two tank rooms, and by the infiltration plate isolation of an adjustment permeability parameters between tank room and sample chamber, the test electrode system of the effect of induced polarization test of moisture sand sample has been installed in described tank room, described sample chamber rotates along horizontal axis under whirligig effect, and then drives sample to rotate the automatic stirring realizing sample; And described sample chamber is connected with pressure control device respectively with tank room.
2. as claimed in claim 1 for the multipurpose test system of moisture sand sample effect of induced polarization measurement, it is characterized in that: described tank room is used for depositing saturated solution, and test electrode system is installed, described test electrode system comprises electrodes of A, B, potential electrode M, N.
3., as claimed in claim 2 for the multipurpose test system that moisture sand sample effect of induced polarization is measured, it is characterized in that: described transmitting electrode makes the plectane equal with tank room cross-sectional sizes by stereotype, and it is arranged on the inner side of tank room lateral wall; Described potential electrode adopts Ag/AgCl contrast electrode, and it is arranged on the inner side of tank room madial wall.
4. as claimed in claim 1 for the multipurpose test system of moisture sand sample effect of induced polarization measurement, it is characterized in that: described pressure control device is the vacuum pump for Control Assay room and tank room pressure, and described vacuum pump conduit is connected with the top of sample chamber with two tank rooms respectively through valve, tensimeter.
5. the multipurpose test system measured for moisture sand sample effect of induced polarization as described in claim 1 or 4, is characterized in that: described infiltration plate comprises flyash, cement, wood chip, the water that mass ratio is 1:0.2:0.1:0.15.
6. as claimed in claim 4 for the multipurpose test system of moisture sand sample effect of induced polarization measurement, it is characterized in that: described whirligig comprises motor, driven wheel and driven gear, wherein driven wheel is supported by abutment ring, and engage each other with driven gear, driven gear is sleeved on the two ends of sample chamber, by the break-make of motor, and the rotation of Control Assay room, and coordinate vacuum pump to be vacuumized by sample chamber, realize mixing of sample in sample chamber.
7., as claimed in claim 1 for the multipurpose test system that moisture sand sample effect of induced polarization is measured, it is characterized in that:
Also comprise dynamic water device, described dynamic water device is communicated with sample chamber inside by connecting hole, realizes controlling the water yield in sand sample and water level in process of the test respectively by the water yield controlled in dynamic water device, and then the dynamic water of simulation.
8., as claimed in claim 7 for the multipurpose test system that moisture sand sample effect of induced polarization is measured, it is characterized in that: described dynamic water device comprises the tank of 2 Control Assay room water yields; 2 described tanks to be arranged on respectively above sample chamber and to be communicated with sample chamber.
9. utilize the proving installation as described in claim 1,2,3,4 or 6 to carry out the method for testing of salinity, factor of porosity, clay content, supply current parameter, it is characterized in that, as follows:
(1), device installs and electrode, sand sample lay filling, specific as follows:
First, electrolytic solution and sand sample is prepared;
Secondly, transmitting electrode and potential electrode are arranged on tank room, left side tank room is connected with abutment ring side, infiltration plate, whirligig are settled successively, opposite side and the mounted side of abutment ring are stitched together, put into by the sand sample configured in the sample chamber be connected with driven gear, right side tank room is installed identical with above-mentioned installation steps; Finally, inject electrolytic solution by the aperture above tank room, motor is connected with whirligig, lays vacuum pump;
(2) salinity of sand sample refers to the zwitterion contained in solution in sand sample or water, and when preparing different salinity sand samples, the solution chosen containing KCl, GaCl2, FeCl3 of equivalent joins in sand sample, then joins in sample chamber;
(3) after preliminary work completes, open and the valve of three on vacuum pump connecting duct, start vacuum pump to be evacuated in sample chamber and tank room, after vacuumizing end, close three valves, actuating motor drives driven wheel rotating disk to make sample chamber Rotating with Uniform, stop motor after a few minutes, and controlled pressure valve slowly pressurizes to sample chamber, viewing panel board is when internal pressure is equal with external pressure, stop pressurization, test;
(4) factor of porosity of sand sample changes the different aperture degree of sand sample by the particle diameter changing sand sample self, after being encased in sample chamber, repeats step (3) after sand sample sample preparation completes;
(5) clay content of sand sample is by adding the clay content that quantitative clay changes sand sample in sand sample, after being encased in sample chamber, repeats step (3) after sand sample sample preparation completes;
(6) supply current of sand sample is the supply current changing sand sample by changing supply voltage, chooses 12V, 24V, 36V and tests respectively;
(7) off-test, stops motor, vacuum pump, and dismounting experimental provision also carries out cleaning for testing ready next time.
10. utilize proving installation as claimed in claim 7 or 8 to carry out the method for testing of dynamic water parameter, it is characterized in that, as follows:
(1), device installs and electrode, sand sample lay filling, specific as follows:
First, electrolytic solution and sand sample is prepared;
Secondly, transmitting electrode and potential electrode are arranged on tank room, left side tank room is connected with abutment ring side, infiltration plate, whirligig are settled successively, opposite side and the mounted side of abutment ring are stitched together, put into by the sand sample configured in the sample chamber be connected with whirligig, right side tank room is installed identical with above-mentioned installation steps;
Finally, inject electrolytic solution by the aperture above tank room, motor is connected with whirligig, lays vacuum pump and tank;
(2) the liquid level difference by changing tank when the dynamic water of sand sample is tested realizes the directed flow of water in sand sample sample, is realized the control of sand sample sample middle water level height by vacuum pump;
(3) after preliminary work completes, the device setting before testing;
First, the sand sample sample configured is encased in sample chamber, connect vacuum pump, motor, tank, and the valve controlling tank is shut and injected the water of inequality at two tanks respectively, form water-head, and the tank water filling continued when testing and starting high water stage, to keep its water level constant, thus control the flow velocity of dynamic water in sand sample sample; Secondly, the valve opening tank makes the water in tank at the flows by action of water-head through sand sample sample, along with the water yield in sample chamber constantly increases, its water level constantly rises, now only open the valve with vacuum pump junction, start vacuum pump, control vacuum pump constantly to sample chamber pressurization, make the position that the water lev el control in sample chamber is being specified; Carry out the test of dynamic water parameter;
(4) height of controlling water level and flow velocity, carries out the dynamic water test in multiple situation;
(5) off-test, closes water tank valve, stops motor, and dismantling experimental provision and carrying out cleaning is that test next time is ready.
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| CN201410720421.1A CN104407387B (en) | 2014-12-01 | 2014-12-01 | Multifunctional test device and method for measuring induced polarization effect of water-containing sand sample |
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| CN111896445A (en) * | 2020-07-03 | 2020-11-06 | 重庆交通大学 | Device and method for testing hydraulic parameters and flow potential of multi-state soil-rock mixture |
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| CN114609201B (en) * | 2022-03-17 | 2023-01-03 | 中国地质大学（武汉） | Rock sample Zeta electric potential, induced polarization signal and permeability multi-parameter measuring platform |
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