CN113092213A - Device and method for manufacturing triaxial samples in batch and capable of performing dry-wet circulation - Google Patents
Device and method for manufacturing triaxial samples in batch and capable of performing dry-wet circulation Download PDFInfo
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- CN113092213A CN113092213A CN202110446317.8A CN202110446317A CN113092213A CN 113092213 A CN113092213 A CN 113092213A CN 202110446317 A CN202110446317 A CN 202110446317A CN 113092213 A CN113092213 A CN 113092213A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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Abstract
The invention discloses a device and a method for manufacturing triaxial samples in batch capable of performing dry-wet circulation, wherein the device at least comprises four steel pipes, a bottom plate is fixedly connected on the steel pipes, and an electric jack is arranged on the bottom plate; the first plate is connected to the steel pipe in a sliding mode, the first plate is fixedly connected with a pressure device, the second plate is fixedly connected to the steel pipe, the second plate is connected with a plurality of soil making molds, the top plate is fixedly connected to the steel pipe, a plurality of dry-wet circulating molds are arranged on the top plate, a slot is formed in one side of the top plate, the dry-wet circulating molds are not communicated with the soil making molds after inserting plates are connected into the slot, and a water pipe is connected to the top end of the dry-wet circulating molds in an inward extending mode; according to the invention, the soil body is pressed into the soil preparation mold in one step by the electric jack, after sample preparation is completed, the electric jack can push the sample into the visual dry-wet cycle mold to perform a dry-wet cycle test, and the moisture content change, crack development and the like of the sample can be monitored by the pressure sensor, so that automatic sample preparation, demolding, dry-wet cycle test can be realized.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering geotechnical tests, and particularly relates to a device and a method for manufacturing triaxial samples in batches, wherein the device and the method can perform dry-wet circulation.
Background
Although the triaxial test is simple and rapid to operate, the preparation of the triaxial test sample needs more time for test personnel, if the conventional soil preparation device is adopted for sample preparation and then the dry-wet cycle test is carried out, the progress of the scientific research test can be greatly delayed, and therefore the development of the sample preparation device after batch dry-wet cycle is needed.
Although the prior soil preparation device capable of preparing samples in batches and demolding is disclosed as CN 111781050A, the invention is named as a sample preparation demolding device for soil body remodeling samples and a using method thereof. However, such a device cannot directly produce a sample after undergoing multiple dry and wet cycles, and still requires a lot of time for the tester to perform a series of subsequent operations such as dry and wet cycle test device arrangement, moisture content monitoring, natural air drying, and the like.
Disclosure of Invention
The invention provides a device and a method for manufacturing triaxial samples in batches, which can perform dry-wet circulation, and aims to overcome the defect that the conventional triaxial sample preparation device cannot perform dry-wet circulation.
The invention adopts the following technical scheme:
a triaxial sample batch manufacturing device capable of performing dry-wet circulation at least comprises four steel pipes, wherein the four steel pipes are parallel to each other and are vertically arranged, a bottom plate, a plate I, a plate II and a top plate are sequentially connected onto the four steel pipes from bottom to top, the bottom plate is fixedly connected onto the steel pipes, and an electric jack is arranged on the bottom plate; the first plate is connected to the steel pipe in a sliding mode, a plurality of vertically arranged steel bars are fixedly connected to the upper bottom surface of the first plate, and a circular pressure head with a pressure sensor is fixedly connected to the top end of each steel bar;
the plate II is fixedly connected to the steel pipe, a plurality of through holes I penetrating through the thickness of the plate are formed in the plate II, the through holes I are correspondingly matched with the circular pressing head, an earth making mold is arranged on the upper bottom surface of the plate II at each through hole, the plurality of earth making molds are parallel to each other and are vertically arranged, two ends of the earth making mold are open, and the top end of the earth making mold is in contact with the top plate;
the top plate is fixedly connected to the steel pipe, a plurality of through holes II penetrating through the thickness of the plate are formed in the top plate, the through holes II are correspondingly matched with the soil preparation mold, a dry-wet circulation mold is arranged on the upper bottom surface of the top plate at each through hole II, the dry-wet circulation molds are all arranged in parallel and vertically, two ends of the dry-wet circulation mold are open, the bottom end of the dry-wet circulation mold is communicated with the soil preparation mold, one side of the top plate is provided with a slot which is communicated with the through holes II, a plug board is movably connected in the slot, after the plug board is connected in the slot, the dry-wet circulation mold is not communicated with the soil preparation mold, and a water pipe is connected to the top end of the dry-;
the telescopic end of the electric jack pushes the plate I to slide on the steel pipe, the circular pressure head is pushed to stretch into the soil preparation mold to prepare a sample, and after the sample preparation is completed, the telescopic end of the electric jack continues to push the circular pressure head to stretch into the soil preparation mold, and the prepared soil sample is pushed into the dry-wet circulation mold.
The device has the characteristics of simple assembly, strong operability, and capability of realizing automatic sample preparation, demolding and dry-wet cycle test. By means of the device, the sample preparation time of scientific research personnel can be obviously shortened, the test efficiency is improved, unnecessary labor cost is avoided, and a new idea is provided for sample preparation of geotechnical engineering indoor tests.
Preferably, the electric jack is located at the right center of the bottom plate.
Preferably, a pulley for adjusting the size of the discharged water is arranged on a top water pipe of the dry-wet circulating die.
Preferably, the four steel pipes are in threaded connection with the bottom plate, the first plate is in sliding connection with the steel pipes through rollers and grooves, the rollers are connected to the inner side of the mounting hole of the first plate, which is connected with the steel pipes, grooves are formed in the steel pipes, and the rollers of the first plate are in sliding connection with the grooves of the steel pipes;
and a steel pipe for connecting the second plate and the top plate is provided with a radial threaded hole, a corresponding second floor part and the top plate are provided with threaded holes, and a bolt is screwed into the steel pipe through the threaded hole of the second plate or the top plate to fixedly connect the second plate and the top plate to the steel pipe.
Preferably, the device for manufacturing the triaxial sample batch capable of dry-wet cycling according to claim 4, wherein the dry-wet cycling mold and the soil preparation mold are both in a cylindrical barrel structure.
Preferably, dry wet cycle mould is the organic glass material, can observe the inside saturation condition.
Preferably, a protruding circular ring is arranged at the position of each through hole two on the upper bottom surface of the top plate, a circumferential thread is arranged on the outer side of the protruding circular ring, and the bottom end of the dry-wet circulation die is connected to the protruding circular ring through the thread and communicated with the soil preparation die.
A triaxial sample batch manufacturing method comprises the following steps:
(1) starting the electric jack, pushing the plate to move upwards by the electric jack, enabling the circular pressure head to just enter the soil making mold, and recording the rising height h of the electric jack at the moment1；
(2) Coating vaseline or engine oil on the bottom surface of the insert plate and the side wall of the sample preparation mould;
(3) weighing a plurality of soil bodies with equal mass according to the requirement of a sample required by a triaxial test, and respectively adding the soil bodies into a sample preparation mold;
(4) inserting the inserting plate into the top plate inserting groove;
(5) starting the electric jack, and closing the electric jack after the plate I stably rises to the height required by the test;
(6) drawing the inserting plate out of the slot of the top plate;
(7) fixing the dry-wet circulating die on the top plate through the threads at the bottom end of the dry-wet circulating die;
(8) the electric jack pushes the plate I to continuously rise, so that the sample is pushed out of the sample preparation mold and is pushed into the dry-wet circulation mold;
(9) after the sample completely enters the dry-wet cycle mold, closing the electric jack;
(10) placing a water tank at a height higher than that of the dry-wet circulating mould, and connecting a water tank hose with a water pipe at the top of the dry-wet circulating mould;
(11) adjusting an adjusting pulley on the water pipe to enable the water flow speed to be low;
(12) clearing the data of the pressure sensor to zero, and beginning to saturate the sample;
(13) monitoring the weight change of the sample by a pressure sensor in the circular member, wherein the weight increase of the sample is the weight increase of moisture, and the initial mass of the sample required by a dry-wet cycle test is mInitialSaturated water content of w2Dry water content of w3Initial water content of the sample is w1When the weight of the sample is increased to reach
When the adjusting pulley is turned offClosing, stopping saturation, entering a dry state, and reducing the mass of the sample to reach
When the test is carried out, the regulating pulley is opened again for saturation until the dry-wet cycle number required by the test is reached;
(14) after the dry-wet cycle is finished, the dry-wet cycle mould is detached from the top plate, and the sample which has undergone the dry-wet cycle is taken down;
(15) and resetting the ascending distance of the electric jack to zero, and moving the plate back to the initial position.
The invention has the following technical effects:
according to the invention, the soil body is pressed into the soil preparation mould in one step by the electric jack, so that the key technical problems that the layered compaction soil preparation method is easy to cause cracks in the middle of the sample, the compactness cannot be ensured, the operation of adding soil for multiple times is troublesome, the labor and the time are wasted and the like are solved. After the sample preparation is completed, the electric jack can push the sample to a visual dry-wet circulation die for dry-wet circulation test, the moisture content change, crack development and the like of the sample can be monitored through the pressure sensor, automatic sample preparation, demolding, dry-wet circulation test can be realized, and labor and time cost are saved.
The height and the size of the sample can be controlled by the diameter of the soil preparation mould, the height of the pressure device and the lifting height of the electric jack, and the whole device has strong assembly operability.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a dry-wet cycle mold;
FIG. 3 is a schematic structural diagram of a first plate;
FIG. 4 is a structural schematic diagram of the pressing device mounted on the first plate;
FIG. 5 is a schematic view of the construction of the top plate;
FIG. 6 is a schematic view of the structure of the base plate;
FIG. 7 is a schematic view of the structure of the water tank;
fig. 8 is a schematic structural view of a steel pipe.
In the figure: 1. the bottom plate, 2, electric jack, 3, plate one, 5, plate two, 6, system native mould, 7, roof, 8, protruding ring, 9, steel pipe, 10, recess, 11, reinforcing bar connecting hole, 12, plate connecting hole, 13, circular pressure head, 14, reinforcing bar, 15, bottom plate connecting hole, 17, gyro wheel, 18, fixed round hole, 20, wet and dry circulation mould, 21, foraminiferous permeable stone, 22, water pipe, 23, pulley, 25, picture peg, 26, internal thread.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the method of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described herein are merely illustrative and are not intended to be limiting.
Example 1
As shown in fig. 1 and 8, the whole device comprises four steel pipes 9 with the diameter of 5cm, grooves 10 with the width of 1cm, the depth of 1cm and the length of 30cm are formed in the middle positions of the steel pipes, so that a subsequent plate I ascends along the grooves through pulleys, threads 26 are formed in the bottoms of the steel pipes, a plurality of fixing round holes 18 with the diameter of 2cm are formed in the tops of the steel pipes along the length direction of the steel pipes, the four steel pipes are parallel to each other and are vertically arranged, and a bottom plate 1, a plate I3, a plate II 5 and a top plate 7 are sequentially connected onto the four steel pipes from.
As shown in fig. 6, four corners of the bottom plate are respectively provided with a bottom plate connecting hole 15 with a diameter of 5cm, the bottom plate connecting hole is internally provided with a thread, the bottom end of the steel pipe extends into and is in threaded connection with the bottom plate connecting hole, and the bottom plate is provided with an electric jack 2.
As shown in fig. 3, the first plate is a square iron plate with a side length of 40cm and a thickness of 2cm, a plate connecting hole 12 with a diameter of 5cm is respectively formed at four corners of the first plate, the plate connecting hole penetrates through the thickness of the plate, a roller 17 is connected to the inner wall of the plate connecting hole so as to reduce friction of the first plate in the ascending and descending processes, and the first plate is in sliding connection with the steel pipe through the roller and the groove. A16 steel bar connecting holes 11 with the diameter of 1cm are formed in the middle of the plate, and threads are arranged inside the steel bar connecting holes, so that a pressing device can be conveniently arranged subsequently.
As figure 4, pressure device includes 16 diameter is 1cm, highly is 25 cm's reinforcing bar 14, and the reinforcing bar is arranged into 4 rows, and adjacent interval is 1cm between the reinforcing bar, and the reinforcing bar bottom stretches into in the reinforcing bar connecting hole to threaded connection with it, and the reinforcing bar top has the circular pressure head 13 that the diameter is 5cm, thickness are 5mm, has pressure sensor in the circular pressure head, and pressure sensor transmits data for the computer in real time.
And the second plate is a square iron plate with the side length of 40cm and the thickness of 2cm, connecting holes of a second plate with the diameter of 5cm are respectively formed in four corners of the second plate, 16 through holes I with the diameter of 5cm are formed in the middle of the second plate, the first through holes I are arranged in 4 rows and 4 columns, the center position of each through hole I is aligned with the center position of the circular pressure head, radial threaded holes are formed in the side walls of the connecting holes of the second plate, the threaded holes are perpendicular to the axis of the connecting holes of the second plate, and bolts are screwed into the threaded holes of the second plate and the fixing round holes 18 of the steel pipe to fixedly connect the.
An earth making mold 6 is arranged on the upper bottom surface of the second plate at each through hole, a plurality of earth making molds are parallel to each other and are vertically arranged, two ends of each earth making mold are open, and the top ends of the earth making molds are in contact with the top plate; the soil making mould is an iron pipe with the height of 25cm, the inner diameter of 5cm and the thickness of 2 mm.
As shown in fig. 5, the top plate is a square iron plate with a side length of 40cm and a thickness of 2cm, 16 through holes two with a diameter of 5cm are formed in the middle of the top plate, the through holes two are correspondingly matched with the soil preparation mold, a protruding ring 8 with a height of 1cm is arranged at each through hole two on the upper bottom surface of the top plate, annular threads are formed in the outer side of the protruding ring, a slot with a length of 30cm and a height of 2.1cm is formed in one side of the top plate, the slot is communicated with the through holes two, an inserting plate 25 is movably connected in the slot, and after the inserting plate is connected in the slot, the dry-wet circulation mold is not communicated with the soil preparation.
As shown in fig. 2, the dry-wet circulation mould 20 is 16 internal diameters 55mm, the external diameter is 60mm, the organic glass round tube with the height of 15cm is provided with two open ends, the inner side wall of the bottom end of the dry-wet circulation mould is provided with an internal thread 26, the bottom end of the dry-wet circulation mould is connected to the convex ring through a thread and is communicated with the soil making mould, the top end of the dry-wet circulation mould is provided with a porous stone 21, the top end of the porous stone is connected with a water pipe 22, and the water pipe is provided with a pulley 23 for adjusting the.
The water tank is made of organic glass, has the size of 40cm in length, 20cm in width and 20cm in height, is provided with an opening at the top, and is connected with 16 hoses at the bottom for connecting with water pipes on the dry-wet circulation die to saturate a sample.
The assembly method of the device comprises the following steps:
(1) four steel pipes with the diameter of 5cm are screwed into the bottom plate connecting holes at the four corners of the bottom plate in the thread direction.
(2) And mounting the pressing device on the first plate.
(3) And placing the electric jack on the bottom plate, and placing the first plate on the telescopic end of the electric jack after penetrating through the four steel pipes.
(4) And (5) penetrating a second plate through the four steel pipes and fixing the position of the second plate.
(5) And placing the soil preparation mold in alignment with the first through hole of the second plate, and fixing the mold by welding, bonding and other modes.
(6) And (4) inserting round holes at four corners of the top plate into the steel pipes in an aligning manner, and fixing the position of the top plate.
(7) And correspondingly connecting and fixing the dry-wet circulating die and the through hole of the top plate.
The sample preparation method of the device comprises the following steps:
(1) starting the electric jack, pushing the plate to move upwards by the electric jack, enabling the circular pressure head to just enter the soil making mold, and recording the rising height h of the electric jack at the moment1。
(2) If the density required by the test is p, the height required by the test sample is h, and the diameter required by the test sample is d, the mass of the soil sample is 0.25p pi hd2Weighing 16 parts of soil with consistent mass according to the requirement of a required sample, and adding the soil required by sample preparation into a sample preparation mould.
(3) Vaseline or engine oil is coated on the bottom surface of the insert plate and the side wall of the sample preparation mold, so that the problem that the quality of a sample is influenced because excessive soil samples are adhered to the side wall of the mold or the bottom surface of the insert plate in the sample preparation process is avoided.
(4) And inserting the inserting plate into the top plate inserting groove to block the top end of the sample preparation mold.
(5) And applying load to the first plate by the electric jack arranged on the bottom plate, so that the first plate can stably rise to the height required by the test. The lifting distance can be flexibly adjusted according to the sample height required by the test, for example, the test density is p, the sample height is h, the sample diameter is d, and the die diameter is d2When the mass of the soil sample is m is 0.25p pi hd2When the circular pressure head and the bottom end of the sample preparation mould are on the same plane, the lifting height of the electric jack is h1The height of the electric jack to be lifted subsequently is h2＝25cm-h。
(6) When the follow-up electric jack reaches h1+h2At this height, the density of the sample is considered to be satisfactory.
(7) Waiting for the electric jack to rise to h1+h2After the height is reached, the inserting plate stops rising, and the inserting plate is pulled out from the slot of the top plate.
(8) The wet and dry circulating die is fixed on the top plate through the threads at the bottom end of the wet and dry circulating die.
(9) And the electric jack pushes the plate to continuously rise, so that the sample is pushed out of the sample preparation mold and enters the dry-wet cycle mold.
(10) And when the sample completely enters the dry-wet circulating die, stopping the lifting of the electric jack.
(11) The water tank is placed at a height higher than the dry-wet cycle mould, and the water tank hose is connected with the water pipes at the top of the 16 dry-wet cycle moulds.
(12) The adjusting pulley on the water pipe is adjusted, so that the water flow speed is low.
(13) The pressure sensor data is cleared to zero and sample saturation begins.
(14) Monitoring the weight change of the sample by a pressure sensor positioned in the circular component, wherein the weight increase of the sample is the weight increase of water, and the saturated water content of the sample required by a dry-wet cycle test is w2Dry water content of w3Initial water content of the sample is w1When the weight of the sample is increased to reach
When the sample is reduced, the regulating pulley is regulated to a closed state, the saturation is stopped, the dry state is entered, and when the sample is reduced in mass, the sample reaches the reduced mass
And then, the regulating pulley is opened again for saturation until the dry-wet cycle number required by the experiment is reached.
(15) After the dry-wet cycle is finished, the dry-wet cycle mold is detached from the top plate, and the sample which has undergone the dry-wet cycle is taken down.
(16) And resetting the ascending distance of the electric jack to zero, and moving the plate back to the initial position.
This device can carry out the preparation and the drawing of patterns of sample through electric jack under the condition that guarantees that sample density reaches the experimental requirement to carry out the dry and wet cycle test through visual dry and wet cycle mould combination pressure sensor, monitor sample moisture content change and crack development. This device has overcome current many system appearance equipment and only can make the sample and the drawing of patterns, can't directly carry out dry wet cycle test, still need additionally to spend the arrangement that the wet cycle test device was done in a large amount of time, measures shortcomings such as moisture content, saturation rate uncontrollable many times, whole device passes through bolted connection, nestification, welding by low cost's component and constitutes, need not other reinforcement for the tester can order relevant accessory and assemble by oneself, practices thrift human cost and economic cost.
Claims (8)
1. A triaxial sample batch manufacturing device capable of performing dry-wet circulation is characterized by at least comprising four steel pipes, wherein the four steel pipes are parallel to each other and are vertically arranged, a bottom plate, a first plate, a second plate and a top plate are sequentially connected onto the four steel pipes from bottom to top, the bottom plate is fixedly connected onto the steel pipes, and an electric jack is arranged on the bottom plate; the first plate is connected to the steel pipe in a sliding mode, a plurality of vertically arranged steel bars are fixedly connected to the upper bottom surface of the first plate, and a circular pressure head with a pressure sensor is fixedly connected to the top end of each steel bar;
the plate II is fixedly connected to the steel pipe, a plurality of through holes I penetrating through the thickness of the plate are formed in the plate II, the through holes I are correspondingly matched with the circular pressing head, an earth making mold is arranged on the upper bottom surface of the plate II at each through hole, the plurality of earth making molds are parallel to each other and are vertically arranged, two ends of the earth making mold are open, and the top end of the earth making mold is in contact with the top plate;
the top plate is fixedly connected to the steel pipe, a plurality of through holes II penetrating through the thickness of the plate are formed in the top plate, the through holes II are correspondingly matched with the soil preparation mold, a dry-wet circulation mold is arranged on the upper bottom surface of the top plate at each through hole II, the dry-wet circulation molds are all arranged in parallel and vertically, two ends of the dry-wet circulation mold are open, the bottom end of the dry-wet circulation mold is communicated with the soil preparation mold, one side of the top plate is provided with a slot which is communicated with the through holes II, a plug board is movably connected in the slot, after the plug board is connected in the slot, the dry-wet circulation mold is not communicated with the soil preparation mold, and a water pipe is connected to the top end of the dry-;
the telescopic end of the electric jack pushes the plate I to slide on the steel pipe, the circular pressure head is pushed to stretch into the soil preparation mold to prepare a sample, and after the sample preparation is completed, the telescopic end of the electric jack continues to push the circular pressure head to stretch into the soil preparation mold, and the prepared soil sample is pushed into the dry-wet circulation mold.
2. The apparatus for three-axis sample batch fabrication capable of dry-wet cycle according to claim 1, wherein the electric jack is located at the center of the bottom plate.
3. The apparatus for three-axis sample batch production capable of dry-wet cycle according to claim 2, wherein the water pipe at the top end of the dry-wet cycle mold is provided with a pulley for adjusting the water outlet.
4. The device for batch production of the triaxial sample capable of dry-wet cycle according to claim 3, wherein four steel pipes are in threaded connection with a bottom plate, a first plate is in sliding connection with the steel pipes through rollers and grooves, the rollers are connected to the inner sides of mounting holes of the first plate, which are connected with the steel pipes, grooves are formed in the steel pipes, and the rollers of the first plate are in sliding connection with the grooves of the steel pipes;
and a steel pipe for connecting the second plate and the top plate is provided with a radial threaded hole, a corresponding second floor part and the top plate are provided with threaded holes, and a bolt is screwed into the steel pipe through the threaded hole of the second plate or the top plate to fixedly connect the second plate and the top plate to the steel pipe.
5. The apparatus for three-axis sample batch production capable of dry-wet cycle according to claim 4, wherein the dry-wet cycle mold and the soil preparation mold are both cylindrical structures.
6. The apparatus for batch fabrication of triaxial samples capable of dry and wet cycling according to claim 5, wherein the dry and wet cycling mold is made of organic glass.
7. The apparatus for mass production of triaxial samples capable of dry and wet cycles according to claim 6, wherein a protruding ring is disposed at each through hole two on the upper bottom surface of the top plate, the protruding ring has a circumferential thread on the outer side thereof, and the bottom end of the dry and wet cycle mold is connected to the protruding ring through a thread and is communicated with the soil preparation mold.
8. A three-axis sample batch manufacturing method is characterized by comprising the following steps:
(1) starting the electric jack, pushing the plate to move upwards by the electric jack, enabling the circular pressure head to just enter the soil making mold, and recording the rising height h of the electric jack at the moment1；
(2) Coating vaseline or engine oil on the bottom surface of the insert plate and the side wall of the sample preparation mould;
(3) weighing a plurality of soil bodies with equal mass according to the requirement of a sample required by a triaxial test, and respectively adding the soil bodies into a sample preparation mold;
(4) inserting the inserting plate into the top plate inserting groove;
(5) starting the electric jack, and closing the electric jack after the plate I stably rises to the height required by the test;
(6) drawing the inserting plate out of the slot of the top plate;
(7) fixing the dry-wet circulating die on the top plate through the threads at the bottom end of the dry-wet circulating die;
(8) the electric jack pushes the plate I to continuously rise, so that the sample is pushed out of the sample preparation mold and is pushed into the dry-wet circulation mold;
(9) after the sample completely enters the dry-wet cycle mold, closing the electric jack;
(10) placing a water tank at a height higher than that of the dry-wet circulating mould, and connecting a water tank hose with a water pipe at the top of the dry-wet circulating mould;
(11) adjusting an adjusting pulley on the water pipe to enable the water flow speed to be low;
(12) clearing the data of the pressure sensor to zero, and beginning to saturate the sample;
(13) monitoring the weight change of the sample by a pressure sensor in the circular member, wherein the weight increase of the sample is the weight increase of moisture, and the initial mass of the sample required by a dry-wet cycle test is mInitialSaturated water content of w2Dry water content of w3Initial water content of the sample is w1When the weight of the sample is increased to reach
When the sample is reduced, the regulating pulley is regulated to a closed state, the saturation is stopped, the dry state is entered, and when the sample is reduced in mass, the sample reaches the reduced mass
When the test is carried out, the regulating pulley is opened again for saturation until the dry-wet cycle number required by the test is reached;
(14) after the dry-wet cycle is finished, the dry-wet cycle mould is detached from the top plate, and the sample which has undergone the dry-wet cycle is taken down;
(15) and resetting the ascending distance of the electric jack to zero, and moving the plate back to the initial position.
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| CN202110446317.8A CN113092213B (en) | 2021-04-25 | 2021-04-25 | Triaxial sample batch manufacturing device and method capable of performing dry-wet circulation |
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| CN202110446317.8A CN113092213B (en) | 2021-04-25 | 2021-04-25 | Triaxial sample batch manufacturing device and method capable of performing dry-wet circulation |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004850A (en) * | 2015-06-03 | 2015-10-28 | 中南大学 | Testing device and method for quantitatively simulating drying-humidifying cycle of soil triaxial sample |
| CN105891445A (en) * | 2016-04-08 | 2016-08-24 | 河海大学 | Rock soil wetting-drying cycle test device and use method thereof |
| CN108414320A (en) * | 2018-03-29 | 2018-08-17 | 西京学院 | A kind of automatic ramming device of triaxial test disturbance soil sample and its control system |
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2021
- 2021-04-25 CN CN202110446317.8A patent/CN113092213B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004850A (en) * | 2015-06-03 | 2015-10-28 | 中南大学 | Testing device and method for quantitatively simulating drying-humidifying cycle of soil triaxial sample |
| CN105891445A (en) * | 2016-04-08 | 2016-08-24 | 河海大学 | Rock soil wetting-drying cycle test device and use method thereof |
| CN108414320A (en) * | 2018-03-29 | 2018-08-17 | 西京学院 | A kind of automatic ramming device of triaxial test disturbance soil sample and its control system |
| AU2020101793A4 (en) * | 2020-07-31 | 2020-09-17 | Xuzhou University Of Technology | Test device for testing bond strength of reinforced concrete |
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| 孙德安;黄丁俊;: "干湿循环下南阳膨胀土的土水和变形特性", 岩土力学, no. 1 * |
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| CN113092213B (en) | 2023-06-30 |
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