CN209764587U - Consolidation test device for composite frequency spectrum induced polarization method and bending element method - Google Patents
Consolidation test device for composite frequency spectrum induced polarization method and bending element method Download PDFInfo
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- CN209764587U CN209764587U CN201920147655.XU CN201920147655U CN209764587U CN 209764587 U CN209764587 U CN 209764587U CN 201920147655 U CN201920147655 U CN 201920147655U CN 209764587 U CN209764587 U CN 209764587U
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Abstract
The utility model discloses a consolidation test device of compound frequency spectrum induced polarization method and crooked first method. Comprises a consolidation penetration cylinder which is mainly composed of a sample cylinder, a piston plate and a bottom plate and is used as an SIP/BE column; the annular flange and the sample cylinder are flexibly spliced and assembled into a whole; a piston plate is arranged in the top of the sample cylinder, a sealing ring is arranged between the piston plate and the inner wall of the sample cylinder, a soil sample to be tested is arranged in the sample cylinder, the piston plate and the bottom plate are provided with a piston plate and a bottom plate drain hole, and a loading transition cover is arranged on the piston plate; the top surface of the bottom plate in the sample cylinder and the bottom surface of the piston plate are both provided with a brass electrode plate through connecting screws, and the brass electrode plate is connected with an electrode terminal through the connecting screws; the outer wall of the sample cylinder is provided with a plurality of groups of electrodes and a plurality of pairs of bending elements, and the plurality of groups of electrodes are uniformly distributed along the vertical different heights of the sample cylinder at intervals. The utility model discloses consolidation test device measurable quantity soil sample that awaits measuring is at the shear wave speed of the frequency spectrum induced polarization method electrical parameter and crooked first method under multiple consolidation condition to obtain the coupling of the two.
Description
Technical Field
the utility model belongs to the technical field of geotechnical engineering's test device, concretely relates to consolidation test device that compound frequency spectrum induced polarization mode (SIP) was used and soil sample electrical parameter is measured and soil sample shear wave velocity is measured with crooked first method (BE).
Background
china has been in the rush of construction engineering, and many problems in geotechnical engineering still need to be solved. The testing work is an important step which must be carried out in the geotechnical engineering, which is not only the basis of the research and development of the subject theory, but also the necessity of the geotechnical engineering practice. With the increase of the industrialization degree of the country and the gradual increase of the requirements on the engineering quality, the traditional detection technology faces new challenges. There is a pressing need for a reliable, economical perturbation method that can characterize large areas of site space to measure site geological conditions. The frequency spectrum induced polarization method which has been developed in the field of geophysics has the advantages of multiple acquired electrical parameters, strong anti-interference capability and the like, is very suitable for high-density measurement of a space domain and a frequency domain, and can provide abundant rock soil information such as hydraulic characteristics and attachment content.
however, the current spectrum induced polarization method has the defects of expensive and complex equipment, more required personnel, low working efficiency, high test cost and the like, and brings obstacles for further research and popularization. And the relation between each parameter measured by the spectrum induced polarization method and each soil mechanics parameter measured by the traditional technical means is not clear, and particularly the relation between the shear wave velocity and the complex resistivity of the soil sample to be measured under the consolidation condition needs to be explored.
How to measure the conductivity and the shear wave velocity of the soil sample that awaits measuring under the consolidation condition simply high-efficiently, be the utility model discloses the key problem that solves.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the background art, the utility model discloses an aim at providing a simple and reliable test device of the shear wave speed of the electrical parameter of frequency spectrum induced polarization method and crooked first law under the measurement consolidation condition, make it can be under consolidation or general condition at the soil sample that awaits measuring, record each item electrical parameter and shear wave speed jointly, can obtain the relevance between the shear wave speed of the electrical parameter of frequency spectrum induced polarization and crooked first law, build the bridge for frequency spectrum induced polarization method and traditional ground test technique.
In order to achieve the above object, the utility model adopts the following technical scheme:
The utility model comprises a consolidation infiltration cylinder which is mainly composed of a sample cylinder, a piston plate and a bottom plate and is used as an SIP/BE column; the outer wall of the lower part of the sample cylinder is provided with an annular clamping groove, an annular flange is arranged outside the annular clamping groove, the side wall of the inner ring of the annular flange is provided with an annular groove, the annular groove extends to the bottom from the middle part of the inner ring of the annular flange, the inner ring and the outer ring of an elastic check ring are respectively hooped in the annular clamping groove of the sample cylinder and the annular groove of the annular flange, the lower end face of the sample cylinder is connected with the bottom plate through a bottom silica gel pad, the annular flange is uniformly provided with a plurality of assembling bolts at intervals along the circumference, each assembling bolt penetrates through the annular flange to be connected into a threaded hole of the bottom plate, and the; a piston plate is arranged in the top of the sample cylinder, a sealing ring is arranged between the periphery of the piston plate and the inner wall of the top of the sample cylinder, a soil sample to be tested is arranged in the middle of the sample cylinder between the piston plate and the bottom plate, and a piston plate drain hole and a bottom plate drain hole are respectively formed in the piston plate and the bottom plate; a loading transition cover is fixedly arranged on the piston plate; the top surface of a bottom plate and the bottom surface of a piston plate in the sample cylinder are both fixedly provided with a brass electrode plate through connecting screws, the top surface of the piston plate is provided with a piston plate electrode terminal, the brass electrode plate on the bottom surface of the piston plate is connected with the piston plate electrode terminal through the connecting screws penetrating through the piston plate, the bottom of the bottom plate is provided with a bottom plate electrode terminal, and the brass electrode plate on the top surface of the bottom plate is connected with the bottom plate electrode terminal through the connecting screws penetrating through the bottom plate; the piston plate electrode terminal and the bottom plate electrode terminal are connected with an external power supply, and the external power supply applies voltage to enable an alternating electric field to be formed between the brass electrode plates on the top surface of the bottom plate and the bottom surface of the piston plate, so that alternating current is generated inside the soil sample to be detected; the outer wall of the sample cylinder is provided with a plurality of groups of electrodes and a plurality of pairs of bending elements, the plurality of groups of electrodes are uniformly distributed at intervals along the vertical different heights of the sample cylinder, each group of electrodes comprises an electrode sealing ring, a pure silver probe and a locking bolt, the pure silver probe penetrates through the locking bolt and the side wall of the sample cylinder and is inserted into a soil sample to be tested in the sample cylinder to measure current parameters in the soil sample, and the electrode sealing ring is sleeved at the position where the pure silver probe penetrates through the side wall of the sample; a plurality of pairs of bending elements are uniformly distributed at intervals along the vertical different heights of the sample cylinder, and a pair of bending element pairs is arranged at the central positions of the piston plate and the bottom plate.
Each pair of bending elements of the outer wall of the sample tube comprises two bending elements which are symmetrically arranged on the side walls of the two sides of the sample tube.
The center positions of the piston plate and the bottom plate are provided with a pair of bending elements which comprise two bending elements symmetrically arranged at the upper end and the lower end of the sample tube.
The bending element comprises a bending element probe, a flexible sealing ring and a hollow bolt, the bending element probe is installed in a mounting hole formed in the side wall of the sample cylinder in a penetrating mode through the hollow bolt and extends into a soil sample to be tested in the sample cylinder, the flexible sealing ring is arranged between the bending element probe and the mounting hole in the side wall of the sample cylinder, and the hollow bolt is locked to adjust the depth of the bending element probe radially extending into the soil sample to be tested.
The sample cylinder, the piston plate and the bottom plate are all made of acrylic materials.
The sample cylinder is made of transparent materials.
One ends of the piston plate drain hole and the bottom plate drain hole are communicated with the middle part of the sample cylinder, and the other ends of the piston plate drain hole and the bottom plate drain hole are communicated with the outside of the cylinder through hoses.
Each pair of bending elements measures the shear wave velocity of the soil sample at the section, the bending elements on the outer wall of the sample cylinder can measure the shear wave velocity of the soil sample to be measured in the horizontal radial direction within the height range of the bending element pair, and the bending elements of the piston plate and the bottom plate can measure the shear wave velocity of the soil sample to be measured in the vertical axial direction of the sample cylinder.
The utility model discloses major structure's a sample section of thick bamboo, piston plate and bottom plate are the ya keli material, constitute by a consolidation infiltration section of thick bamboo, frequency spectrum induced polarization method measurement system and crooked first test system.
The utility model discloses but by transparent and BE equipped with measuring device's cylinder barrel and upper portion loaded piston board and the fixed bottom plate in lower part constitute the main part of SIP BE post, cylindrical barrel is equipped with mated bending element along diameter direction, and piston board and bottom plate central point put and are equipped with the bending element in pairs along the axle center, and every shear wave velocity to bending element all measurable quantity test soil sample. Brass electrode plates are embedded on the surfaces of the piston plate and the lower bottom plate, which are contacted with the soil sample, current is input through an electrode terminal, an alternating electric field is formed between the two plates, and then the electrical parameters of the soil sample are measured through the electrodes on the side surface of the cylinder body; and water inlet and outlet holes are formed in the piston plate and the lower bottom plate, so that rated force loading is performed on the piston plate, and consolidation and penetration tests are performed.
Compared with the background art, the utility model the beneficial effect who has is:
(1) The utility model discloses special design and set up frequency spectrum induced polarization measurement structure on the crooked first measurement system of shear wave velocity, can measure the frequency domain response of the soil sample that awaits measuring with the frequency spectrum induced polarization mode under the different stress level of soil to and then handle and obtain the content and the distribution of products such as calcium carbonate sediment, biological community, biomembrane that are generated by chemical method or microbiological method in the soil sample that awaits measuring;
(2) The utility model discloses the space-time distribution homogeneity that the frequency spectrum induced polarization measurement structure to the soil sample that awaits measuring can monitor above-mentioned result provides new device to the monitoring technology of pollutant restoration level in grouting method chemistry or biological modification, the soil sample that awaits measuring.
(3) the time and space distribution of shear wave velocity in the soil column in the repairing process of modified soil, microorganism reinforced soil or polluted soil sample to be detected can be monitored by using a tomography technology.
(4) The instrument has simple structure, small size (about 40cm high), and convenient carrying, so the test cost is low and the reliability is high.
The utility model discloses consolidation test device measurable quantity soil sample that awaits measuring is at the shear wave speed of the frequency spectrum induced polarization method electrical parameter and crooked first method under multiple consolidation condition to the two coupling nature is discover in the research.
Drawings
Fig. 1 is a schematic cross-sectional view of the device of the present invention.
Fig. 2 is a schematic partial sectional view of the electrode mounting portion of the present invention.
Fig. 3 is a schematic partial sectional view of the bending element installation part of the present invention.
In the figure: 1. the test device comprises a loading transition cover, 2, a piston plate electrode terminal, 3, a brass electrode plate, 4, a sample cylinder, 5, a connecting screw, 6, an annular flange, 7, a bottom plate electrode terminal, 8, a piston plate, 9, a piston plate drain hole, 10, a sealing ring, 11, a bending element test unit, 12 and an electrode; 13. assembling bolts 14, elastic check rings 15, bottom plates 16, bottom plate drain holes 17 and bottom silica gel pads; 11-1, a flexible sealing ring; 11-2, bending element probe; 11-3, hollow bolts; 12-1, electrode sealing rings; 12-2, a locking bolt 12-3 and a pure silver probe.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
as shown in FIG. 1, the embodiment of the present invention comprises a cylindrical consolidation infiltration cylinder mainly composed of a sample cylinder 4, a piston plate 8 and a bottom plate 15 as an SIP/BE column; the outer wall of the lower part of the sample cylinder 4 is provided with an annular clamping groove, an annular flange 6 is arranged outside the annular clamping groove, the side wall of the inner ring of the annular flange 6 is provided with an annular groove, the annular groove extends to the bottom from the middle part of the inner ring of the annular flange 6, an inner ring and an outer ring of an elastic retainer ring 14 are respectively hooped in the annular clamping groove of the sample cylinder 4 and the annular groove of the annular flange 6, the lower end face of the sample cylinder 4 is connected with a bottom plate 15 through a bottom silica gel pad 17, the annular flange 6 is uniformly provided with a plurality of assembling bolts 13 at intervals along the circumference, each assembling bolt 13 penetrates through the annular flange 6 to be connected into a threaded hole of the bottom plate 15, and the annular flange 6; a piston plate 8 is arranged in the top of the sample tube 4, a sealing ring 10 is arranged between the periphery of the piston plate 8 and the inner wall of the top of the sample tube 4, and the piston plate 8 is airtight when moving up and down in the sample tube 4 through the sealing ring 10; the middle part of the sample cylinder 4 between the piston plate 8 and the bottom plate 15 is filled with a soil sample to be tested, the piston plate 8 and the bottom plate 15 are respectively provided with a piston plate drain hole 9 and a bottom plate drain hole 16, one end of each of the piston plate drain hole 9 and the bottom plate drain hole 16 is communicated with the middle part of the sample cylinder 4, and the other end of each of the piston plate drain hole 9 and the bottom plate drain hole 16 is communicated to the outside of the cylinder through a hose; the piston plate 8 is fixedly provided with a loading transition cover 1, and the loading transition cover 1 is used for applying quantitative load to the loading transition cover for consolidation and penetration tests and the like during the tests.
As shown in fig. 1, a brass electrode plate 3 is fixedly mounted on both the top surface of a bottom plate 15 and the bottom surface of a piston plate 8 in a sample tube 4 through a connecting screw 5, a piston plate electrode terminal 2 is mounted on the top surface of the piston plate 8, the brass electrode plate 3 on the bottom surface of the piston plate 8 is connected with the piston plate electrode terminal 2 through the connecting screw 5 penetrating through the piston plate 8, a bottom plate electrode terminal 7 is mounted on the bottom of the bottom plate 15, and the brass electrode plate 3 on the top surface of the bottom plate 15 is connected with the bottom plate electrode terminal 7 through the connecting screw 5 penetrating through the bottom plate 15; the piston plate electrode terminal 2 and the bottom plate electrode terminal 7 are connected with an external power supply, and voltage is applied by the external power supply to form an alternating electric field between the brass electrode plates 3 on the top surface of the bottom plate 15 and the bottom surface of the piston plate 8, so that alternating current is generated inside the soil sample to be measured; the outer wall of the sample cylinder 4 is provided with a plurality of groups of electrodes 12 and a plurality of pairs of bending elements, and the plurality of groups of electrodes 12 are uniformly distributed along the vertical direction of the sample cylinder 4 at different height intervals.
As shown in fig. 3, each group of electrodes 12 comprises an electrode sealing ring 12-1, a pure silver probe 12-3 and a locking bolt 12-2, the pure silver probe 12-3 penetrates through the locking bolt 12-2 and the side wall of the sample cylinder 4 and is inserted into a soil sample to be measured in the sample cylinder 4 to measure current parameters in the soil sample, and the electrode sealing ring 12-1 is sleeved on the pure silver probe 12-3 penetrating through the side wall of the sample cylinder 4; the measuring system of the frequency spectrum induced polarization method is mainly composed of a brass electrode plate 3 and a plurality of groups of electrodes 12 arranged on the outer wall of a sample cylinder 4.
As shown in fig. 1, a plurality of pairs of bending elements are uniformly distributed at intervals along the vertical direction of the sample tube 4 at different heights, and each pair of bending elements comprises two bending elements 11 symmetrically arranged on the side walls of two sides of the sample tube 4; meanwhile, a pair of bending element pairs is arranged at the center of the piston plate 8 and the bottom plate 15, and each pair of bending element pairs comprises two bending elements 11 which are symmetrically arranged at the upper end and the lower end of the sample tube 4. The bending element test system is mainly formed by all bending element pairs.
As shown in FIG. 2, the bending element 11 comprises a bending element probe 11-2, a flexible sealing ring 11-1 and a hollow bolt 11-3, the bending element probe 11-2 is installed in a mounting hole formed in the side wall of the sample cylinder 4 in a penetrating manner through the hollow bolt 11-3 and extends into the soil sample to be tested in the sample cylinder 4, the flexible sealing ring 11-1 is arranged between the bending element probe 11-2 and the mounting hole in the side wall of the sample cylinder 4, and the hollow bolt 11-3 is locked to adjust the radial depth of the bending element probe 11-2 extending into the soil sample to be tested. The flexible sealing ring 11-1 can ensure the sealing performance of the device and play a role in buffering, and wave vibration of the bending element is prevented from being transmitted to the sample cylinder.
Each pair of bending elements measures the shear wave velocity of the soil sample at the section, the bending elements on the outer wall of the sample cylinder 4 can measure the shear wave velocity of the soil sample to be measured in the horizontal radial direction within the height range of the bending element pair, and the bending elements of the piston plate 8 and the bottom plate 15 can measure the shear wave velocity of the soil sample to be measured in the vertical axial direction of the sample cylinder 4.
The utility model discloses a concrete embodiment and implementation working process are as follows:
Firstly, a sample cylinder 4 is placed on a bottom plate 15, a soil sample to be tested is filled in the sample cylinder 4, and then a loading transition cover 1 is placed on the soil sample to be tested. Firstly, applying pressure to the loading transition cover 1, pressing down the piston plate 8 through the loading transition cover 1 to carry out rated force loading, carrying out consolidation and penetration tests, and draining water from the drain hole of the bottom plate when a soil sample to be tested enters water from the drain hole of the piston plate during consolidation and penetration.
A) Collecting and obtaining electrical parameters of frequency spectrum induced polarization
The piston plate electrode terminal 2 and the bottom plate electrode terminal 7 are connected with an external power supply, and the external power supply applies voltage to the brass electrode plates 3 on the top surface of the bottom plate 15 and the bottom surface of the piston plate 8 through the piston plate electrode terminal 2 and the bottom plate electrode terminal 7, so that an alternating electric field is formed between the brass electrode plates 3 on the top surface of the bottom plate 15 and the bottom surface of the piston plate 8, and further, alternating current is generated inside the soil sample to be tested;
The applied alternating electric field is provided by a spectrum induced polarization instrument. Wherein the reference resistance value is close to the actual resistance of the tested soil sample; the excitation frequency sweep range is typically between 0.01Hz and 1000Hz, with the frequency spacing being on a logarithmic scale.
The electric signal of the soil sample to be measured in the range near the height of the electrode 12 is obtained by measuring each group of electrodes 12 inserted into the soil sample through the outer wall of each sample cylinder 4, the obtained frequency domain response complex signal is recorded, and conductivity signals of a real part and an imaginary part can be obtained after the signal is derived. Obtaining a characteristic relaxation frequency according to the frequency domain response of the virtual conductivity, wherein the frequency represents the size of calcium carbonate precipitate in the soil sample; and obtaining the amplitude of the frequency domain response of the complex conductivity according to the frequency domain response of the complex conductivity, wherein the amplitude represents the precipitation amount of calcium carbonate in the soil sample. The size and content of the precipitate obtained by the above will correlate with the shear wave velocity signal and thus mutually corroborate.
In addition, high-density electrical measurement can be carried out through a plurality of pairs of voltage electrodes, and distribution information of the sediment in the soil column can be obtained.
B) Collecting shear wave velocity under the same state of collecting electrical parameters
And working by pairs of bending elements, acquiring electrical signal data, and processing to obtain shear wave velocities of layers with different horizontal heights of the soil sample to be detected and shear wave velocities in the vertical direction.
And finally, correlating the electrical parameter (amplitude m n) of the complex conductivity frequency domain response at each different height with the shear wave velocity (Vs) at each different height and direction to obtain strong correlation between the electrical parameter of the spectral induced polarization and the shear wave velocity of the bending element method.
The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, and any modifications and variations of the present invention are within the spirit and scope of the following claims.
Claims (7)
1. A consolidation test device of compound frequency spectrum induced polarization method and bending element method which characterized in that: comprises a consolidation penetration cylinder which is mainly composed of a sample cylinder (4), a piston plate (8) and a bottom plate (15) and is used as an SIP/BE column; the outer wall of the lower part of the sample cylinder (4) is provided with an annular clamping groove, an annular flange (6) is arranged outside the annular clamping groove, the side wall of the inner ring of the annular flange (6) is provided with an annular groove, the annular groove extends to the bottom from the middle part of the inner ring of the annular flange (6), the inner ring and the outer ring of an elastic check ring (14) are respectively hooped in the annular clamping groove of the sample cylinder (4) and the annular groove of the annular flange (6), the lower end surface of the sample cylinder (4) is connected with a bottom plate (15) through a bottom silica gel pad (17), the annular flange (6) is uniformly provided with a plurality of assembling bolts (13) at intervals along the circumference, each assembling bolt (13) penetrates through the annular flange (6) to be connected into a threaded hole of the bottom plate (15), and the annular flange (6) and the sample cylinder (4; a piston plate (8) is arranged in the top of the sample cylinder (4), a sealing ring (10) is arranged between the periphery of the piston plate (8) and the inner wall of the top of the sample cylinder (4), a soil sample to be tested is contained in the middle of the sample cylinder (4) between the piston plate (8) and the bottom plate (15), and a piston plate drain hole (9) and a bottom plate drain hole (16) are respectively formed in the piston plate (8) and the bottom plate (15); a loading transition cover (1) is fixedly arranged on the piston plate (8);
The top surface of a bottom plate (15) in a sample cylinder (4) and the bottom surface of a piston plate (8) are fixedly provided with brass electrode plates (3) through connecting screws (5), the top surface of the piston plate (8) is provided with a piston plate electrode terminal (2), the brass electrode plates (3) on the bottom surface of the piston plate (8) are connected with the piston plate electrode terminal (2) through the connecting screws (5) penetrating through the piston plate (8), the bottom of the bottom plate (15) is provided with a bottom plate electrode terminal (7), and the brass electrode plates (3) on the top surface of the bottom plate (15) are connected with the bottom plate electrode terminal (7) through the connecting screws (5) penetrating through the bottom plate (15); the piston plate electrode terminal (2) and the bottom plate electrode terminal (7) are connected to an external power supply, and the external power supply applies voltage to form an alternating electric field between the brass electrode plates (3) on the top surface of the bottom plate (15) and the bottom surface of the piston plate (8), so that alternating current is generated inside the soil sample to be measured; the outer wall of the sample cylinder (4) is provided with a plurality of groups of electrodes (12) and a plurality of pairs of bending elements, the plurality of groups of electrodes (12) are uniformly distributed at intervals along the vertical different heights of the sample cylinder (4), each group of electrodes (12) comprises an electrode sealing ring (12-1), a pure silver probe (12-3) and a locking bolt (12-2), the pure silver probe (12-3) penetrates through the locking bolt (12-2) and the side wall of the sample cylinder (4) and is inserted into a soil sample to be tested in the sample cylinder (4) to measure current parameters in the soil sample, and the electrode sealing ring (12-1) is sleeved at the position where the pure silver probe (12-3) penetrates through the side wall of the sample cylinder (4; a plurality of pairs of bending element pairs are uniformly distributed along the vertical direction of the sample cylinder (4) at different height intervals, and meanwhile, a pair of bending element pairs is arranged at the center positions of the piston plate (8) and the bottom plate (15).
2. The apparatus for testing consolidation of a compound spectrum induced polarization method and a bending element method according to claim 1, wherein: each pair of bending elements of the outer wall of the sample tube (4) comprises two bending elements (11) which are symmetrically arranged on the side walls of two sides of the sample tube (4).
3. The apparatus for testing consolidation of a compound spectrum induced polarization method and a bending element method according to claim 1, wherein: the center positions of the piston plate (8) and the bottom plate (15) are provided with a pair of bending elements which comprise two bending elements (11) symmetrically arranged at the upper end and the lower end of the sample cylinder (4).
4. The apparatus for testing consolidation of a compound spectrum induced polarization method and a bending element method according to claim 2 or 3, wherein: the bending element (11) comprises a bending element probe (11-2), a flexible sealing ring (11-1) and a hollow bolt (11-3), the bending element probe (11-2) is installed in a mounting hole formed in the side wall of the sample cylinder (4) in a penetrating mode through the hollow bolt (11-3) and extends into a soil sample to be tested in the sample cylinder (4), the flexible sealing ring (11-1) is arranged between the bending element probe (11-2) and the mounting hole in the side wall of the sample cylinder (4), and the hollow bolt (11-3) is locked to adjust the depth of the bending element probe (11-2) radially extending into the soil sample to be tested.
5. The apparatus for testing consolidation of a compound spectrum induced polarization method and a bending element method according to claim 1, wherein: the sample cylinder (4), the piston plate (8) and the bottom plate (15) are all made of acrylic materials.
6. The apparatus for testing consolidation of a compound spectrum induced polarization method and a bending element method according to claim 1, wherein: the sample cylinder (4) is made of transparent materials.
7. The apparatus for testing consolidation of a compound spectrum induced polarization method and a bending element method according to claim 1, wherein: one ends of the piston plate drain hole (9) and the bottom plate drain hole (16) are communicated with the middle part of the sample cylinder (4), and the other ends of the piston plate drain hole (9) and the bottom plate drain hole (16) are communicated with the outside of the cylinder through hoses.
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| CN109632494A (en) * | 2019-01-28 | 2019-04-16 | 浙江大学 | The consolidation testing device of complex spectrum induced polarization method and flexure element method |
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| CN109632494A (en) * | 2019-01-28 | 2019-04-16 | 浙江大学 | The consolidation testing device of complex spectrum induced polarization method and flexure element method |
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