CN112924261B - Hydraulic multi-angle layering triaxial sample preparation device and sample preparation method thereof - Google Patents
Hydraulic multi-angle layering triaxial sample preparation device and sample preparation method thereof Download PDFInfo
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- CN112924261B CN112924261B CN202110109395.9A CN202110109395A CN112924261B CN 112924261 B CN112924261 B CN 112924261B CN 202110109395 A CN202110109395 A CN 202110109395A CN 112924261 B CN112924261 B CN 112924261B
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Abstract
The invention discloses a hydraulic multi-angle layering triaxial sample preparation device which comprises a base, a hydraulic device, a sample preparation assembly and a locking assembly, wherein one end of the base is sealed, the other end of the base is provided with a fixing flange, the middle part of the fixing flange is also provided with a mounting plate, the hydraulic device is arranged in an inner cavity of the base, the sample preparation assembly comprises a cylindrical base, a connecting column, a plurality of stand columns, a compression column, a sealing plate and an angle piece, the cylindrical base, the connecting column, the stand columns and the compression column are sequentially overlapped, the cylindrical base is mounted on the mounting plate, the sealing plate is arranged in the cylindrical base and is positioned far away from the end of the connecting column, the angle piece is arranged on the upper end face of the sealing plate, and the locking assembly is used for compressing the sample preparation assembly. The invention can realize the advantages of layered remolded soil manufacture, layered soil layer angle control, sample quality improvement, soil body extrusion prevention in the sample preparation process, and the like.
Description
Technical Field
The invention relates to the field of soil mechanical property testing in civil engineering disciplines, in particular to a hydraulic multi-angle layering triaxial sample preparation device and a sample preparation method thereof.
Background
The remolded soil is a test soil which is prepared by drying and crushing undisturbed soil, and reproducing the undisturbed soil according to the density and the water content of the undisturbed soil and has the same or similar composition and structure as the undisturbed soil. Although the remolded soil damages the inherent structure and state of the soil relative to the undisturbed soil, the remolded soil often has the conditions of large sampling difficulty, overlarge disturbance or difficult storage and transportation of the undisturbed soil in engineering practice and research projects, and when certain tests are carried out, researchers can adjust certain physical properties of the undisturbed soil such as water content, dry density and the like according to the test requirements, so that the remolded soil often plays an indispensable role in the research of soil properties.
The soil sample remolding method mainly comprises a consolidation method and a compaction method. The consolidation method is to add distilled water into the air-dried soil body to prepare slurry with the liquid limit larger than the liquid limit, then pour the slurry into a sample preparation cylinder, and apply static load on the top to consolidate the soil sample. The existing research data show that the consolidation method has better remolding effect, but from the test point of view, the sample preparation process is complicated, the consolidation time is long, and the requirements on sample preparation equipment are higher. The compaction method uses a hammer with a certain mass to naturally fall from a certain height and compact soil samples into multiple layers to a required size, and compared with the consolidation method, the sample preparation method is simple and easy to implement and has a short sample preparation period, but the compaction sample quality often has a great correlation with the operation level of experiment technicians, and the soil samples have uneven compaction degree of the upper and lower layers of the soil samples due to uneven stress, so that the influence on experimental results is great.
The traditional remolded soil sample preparation tool is mainly a metal three-valve and a compaction device, and is only suitable for sample preparation work of a single soil body. In the process of preparing the layered soil sample, the traditional sample preparation tool has the defects of complex sample preparation process, large sample preparation quality fluctuation, poor precision, incapability of preparing the layered soil sample with angles and the like. With the development of the demand of geotechnical tests, the geotechnical tests of single-layer soil often have limitations, so that the physical and mechanical properties of the layered soil are increasingly valued by researchers, and theoretical research on the layered soil is not hindered little because of the lack of a proper layered soil sample preparation device. Meanwhile, in layered soil, the angle of the layer has great influence on the physical and mechanical properties of the soil sample, but the existing remolded soil sample preparation device cannot realize the control of the angle of the remolded soil layer.
In view of importance and specificity of remolded soil in geotechnical test, in order to solve the problems of complicated process, large fluctuation of sample quality and poor precision of multi-angle and layered remolded soil sample preparation, a hydraulic multi-angle layered triaxial sample preparation device is invented.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hydraulic multi-angle layering triaxial sample preparation device.
The aim of the invention is realized by the following technical scheme: the utility model provides a fluid pressure type multi-angle layering triaxial sample system appearance ware, includes base, hydraulic means, system appearance subassembly and locking subassembly, base one end is sealed, and the base other end is equipped with flange, be equipped with a plurality of lugs on flange's the lateral wall, all seted up the locking hole on the lug, flange's middle part still is equipped with the mounting disc, hydraulic means locates in the inner chamber of base, system appearance subassembly includes cylinder base, spliced pole, a plurality of stand, compresses tightly post, closing plate and angle piece, cylinder base a plurality of the stand with compress tightly the post and overlap in proper order and set up, cylinder base install in on the mounting disc, the closing plate is located in the cylinder base and be located keep away from the spliced pole end, the angle piece is located the closing plate up end, locking subassembly is used for compressing tightly system appearance subassembly.
One of the preferred schemes is that the butt joint end of the cylindrical base and the connecting column is provided with an inner conical step, one end of the connecting column is provided with a first conical surface matched with the inner conical step, the other end of the connecting column is provided with a first concave ring, one end of the upright column is provided with a first convex ring, the other end of the upright column is provided with a second concave ring, the compression column and the matching end of the upright column are provided with a second convex ring, the first concave ring is matched with the first convex ring, and the second concave ring is matched with the second convex ring.
The locking assembly comprises a pressing plate, a fixing plate, a locking bolt and a connecting bolt, wherein the pressing plate passes through the locking hole through the locking bolt to be connected with the base, the fixing plate is fixed on the pressing plate through the connecting bolt, and a round hole for embedding the pressing column is formed in the middle of the fixing plate.
One preferable scheme is that the fixing plate consists of two fixing blocks, four mounting holes are formed in the two fixing blocks, a second conical surface is formed in the inner side of each round hole, a third conical surface is formed in the matched end of each compression column and the round hole, and the second conical surface is matched with the third conical surface.
The hydraulic device comprises a hydraulic jack and a hydraulic pump, wherein the hydraulic jack is arranged in the base, the top end of a piston rod of the hydraulic jack is in contact with the sealing plate, the hydraulic pump is connected with the hydraulic jack, and the hydraulic pump is arranged outside the base.
In one preferable scheme, a sealing ring is arranged on the side wall of the sealing plate.
In one preferable mode, the angle range of the angle piece is 0-60 degrees.
In one preferable scheme, the middle part of the fixing flange is provided with a mounting groove, and the mounting disc is arranged in the mounting groove.
Another aspect of the present invention is to provide a hydraulic multi-angle layered triaxial sample preparation method, including the steps of:
(1) Firstly, installing a hydraulic device in the base, and then placing an installation disc;
(2) Coating vaseline on the inner surfaces of the cylindrical base, the connecting column and the compacting column, mounting the cylindrical base on the mounting plate, mounting the connecting column on the cylindrical base, mounting the compacting column on the connecting column, sequentially placing the sealing plate and the angle piece into the cylindrical base, and adjusting the sealing plate to be horizontal;
(3) Pouring a single red soil sample, lightly compacting by means of a tool, and installing a locking assembly to realize compaction of the cylindrical base, the connecting column and the compacting column;
(4) Starting the hydraulic device until the soil sample is observed to be extruded to an ideal position through the compaction column, and stopping pressurizing;
(5) Then the pressure of the hydraulic device is removed, the locking assembly is loosened until the upright post can be placed, meanwhile, the connecting post and the compression post are separated, the sealing plate and the angle piece are removed by a sideslip method, and then the sealing plate and the angle piece are reinstalled and adjusted to be horizontal;
(6) Pouring a loess, lightly compacting, installing the upright post between the connecting post and the compacting post, re-fastening the locking assembly, starting the hydraulic device, and stopping pressurizing until the soil sample is observed to be extruded to an ideal position through the upright post;
(7) Preparing soil layers such as a third layer, a fourth layer and a fifth layer based on the steps (5) and (6) and changing the operation step of separating the connecting column and the compacting column in the step (5) into separating the connecting column and the upright column;
(8) When the last layer of sample is manufactured, the pressure of the hydraulic device is removed, the locking assembly is loosened until the last layer of stand column can be placed, the connecting column and the stand column are separated, the sealing plate and the angle piece are removed by a sideslip method, and the angle piece is replaced by a horizontal angle piece and is adjusted to be horizontal;
(9) Pouring the last loess, lightly compacting, installing the upright post between the connecting post and the compacting post, re-fastening the locking assembly, starting the hydraulic device, and stopping pressurizing until the soil sample is observed to be extruded to an ideal position through the upright post;
(10) When the device is disassembled, the locking assembly is completely loosened, the sample preparation assembly and the soil sample are completely taken out through a sideslip method, the pressure of the hydraulic device is relieved, all the parts are cleaned, and then the parts are wiped dry for next use.
The beneficial effects of the invention are as follows: the invention has the advantages of simple manufacturing process, small fluctuation of sample forming quality, high precision, realization of layered remolded soil manufacturing, layered soil layer angle control, improvement of sample quality, prevention of soil body extrusion in the sample manufacturing process, and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic overall sectional view of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;
FIG. 3 is a schematic view of a cylindrical base structure according to the present invention;
FIG. 4 is a schematic view of a connecting column structure according to the present invention;
FIG. 5 is a schematic view of the structure of the column according to the present invention;
FIG. 6 is a schematic view of a packed column according to the present invention;
fig. 7 is a schematic diagram of the overall structure of the present invention.
In the figure, 1-base, 11-fixed flange, 111-journal stirrup, 12-mounting plate, 2-hydraulic device, 21-hydraulic jack, 22-hydraulic pump, 3-sample preparation subassembly, 31-cylinder base, 311-inner cone ladder, 32-connecting column, 321-first conical surface, 322-first concave ring, 33-stand, 331-first convex ring, 332-second concave ring, 34-compaction column, 341-second convex ring, 342-third conical surface, 35-sealing plate, 36-angle piece, 4-locking subassembly, 41-clamp plate, 42-fixed plate, 43-locking bolt, 44-connecting bolt, 5-sealing ring.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
The terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
The terms "parallel", "perpendicular", and the like do not denote that the components are required to be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel than "perpendicular" and does not mean that the structures must be perfectly parallel, but may be slightly tilted.
The terms "horizontal," "vertical," "overhang," and the like do not denote that the component is required to be absolutely horizontal, vertical, or overhang, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
Furthermore, the terms "substantially," "essentially," and the like, are intended to be limited to the precise form disclosed herein and are not necessarily intended to be limiting. For example: "approximately equal" does not merely mean absolute parallelism, but is generally offset due to the difficulty in achieving absolute "equality" during actual production and operation. Thus, in addition to absolute equality, "approximately equal to" includes the above-described case where there is a certain deviation. In other cases, the terms "substantially", "essentially" and the like are used in a similar manner to those described above unless otherwise indicated.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a fluid pressure type multi-angle layering triaxial sample system appearance ware, includes base 1, hydraulic means 2, system appearance subassembly 3 and locking subassembly 4, base 1 one end is sealed, and the base 1 other end is equipped with flange 11, be equipped with a plurality of lugs 111 on the lateral wall of flange 11, all seted up the locking hole on the lug 111, flange 11's middle part still is equipped with mounting plate 12, hydraulic means 2 locates in the inner chamber of base 1, system appearance subassembly 3 includes cylinder base 31, spliced pole 32, a plurality of stand 33, compresses tightly post 34, closing plate 35 and angle piece 36, cylinder base 31 the spliced pole 32 a plurality of stand 33 with compress tightly post 34 overlap in proper order and set up, cylinder base 31 install in on the mounting plate 12, closing plate 35 is located in the cylinder base 31 and be located and keep away from spliced pole 32 end, angle piece 36 is located closing plate 35 up end, locking subassembly 4 is used for compressing tightly system appearance subassembly 3. The invention has the advantages of simple manufacturing process, small fluctuation of sample forming quality, high precision, realization of layered remolded soil manufacturing, layered soil layer angle control, improvement of sample quality, prevention of soil body extrusion in the sample manufacturing process, and the like. The sealing plate 35 and the angle piece 36 are placed in the cylindrical base 31, so that the effect of preventing the extrusion of soil and water in the soil in the sample preparation process can be realized.
Preferably, the butt joint end of the cylindrical base 31 and the connecting column 32 is provided with an inner conical step 311, one end of the connecting column 32 is provided with a first conical surface 321 matched with the inner conical step 311, the other end of the connecting column 32 is provided with a first concave ring 322, one end of the upright column 33 is provided with a first convex ring 331, the other end of the upright column 33 is provided with a second concave ring 332, the matched end of the compression column 34 and the upright column 33 is provided with a second convex ring 341, the first concave ring 322 is matched with the first convex ring 331, and the second concave ring 332 is matched with the second convex ring 341. The cylindrical base 31, the connecting column 32, the plurality of upright columns 33 and the pressing column 34 are mutually matched, so that the alignment and the installation are convenient, and the movement of the cylindrical base, the connecting column and the pressing column in the horizontal direction is limited; the cylindrical base 31 is used for temporarily serving as a storage space for soil if the volume of uncompacted soil is far greater than the volume of the upright posts 33 in the sample preparation process, and the redundant soil is compacted in the connecting posts 32, the plurality of upright posts 33 and the compacting posts 34 after the hydraulic device 2 starts to work. The cylindrical base 31, the connecting column 32, the plurality of upright columns 33 and the compacting column 34 are all made of transparent materials, and scale marks are arranged on the outer surface of the cylindrical base, so that reading in sample preparation and the compacting degree of the sample can be conveniently controlled.
Preferably, the locking assembly 4 comprises a pressing plate 41, a fixing plate 42, a locking bolt 43 and a connecting bolt 44, the pressing plate 41 passes through the locking hole through the locking bolt 43 to be connected with the base 1, the fixing plate 42 is fixed on the pressing plate 41 through the connecting bolt 44, and a round hole for being embedded into the pressing column 34 is formed in the middle of the fixing plate 42.
Preferably, the fixing plate 42 is composed of two fixing blocks, four mounting holes are formed in each of the two fixing blocks, a second conical surface is formed in the inner side of each of the round holes, a third conical surface 342 is formed at the mating end of the compression column 34 and the round hole, and the second conical surface is mated with the third conical surface 342.
Preferably, the hydraulic device 2 includes a hydraulic jack 21 and a hydraulic pump 22, the hydraulic jack 21 is disposed inside the base 1, a top end of a piston rod of the hydraulic jack 21 is in contact with the sealing plate 35, the hydraulic pump 22 is connected with the hydraulic jack 21, and the hydraulic pump 22 is disposed outside the base 1.
Preferably, a sealing ring 5 is provided on the side wall of the sealing plate 35. Further preventing soil body from extruding out in the sample preparation process.
Preferably, the angle of the angle piece is in the range of 0 to 60 °.
Preferably, a mounting groove is formed in the middle of the fixing flange 11, and the mounting plate 12 is arranged in the mounting groove.
Another aspect of the present invention is to provide a hydraulic multi-angle layered triaxial sample preparation method, including the steps of:
(1) Firstly, installing the hydraulic device 2 in the base 1, and then placing the installation plate 12;
(2) Coating vaseline on the inner surfaces of the cylindrical base 31, the connecting column 32 and the pressing column 34, mounting the cylindrical base 31 on the mounting plate 12, mounting the connecting column 32 on the cylindrical base 31, mounting the pressing column 34 on the connecting column 32, sequentially placing the sealing plate 35 and the angle piece 36 into the cylindrical base 31, and adjusting the sealing plate 35 to be horizontal;
(3) Pouring a single red soil sample, lightly compacting by means of a tool, and installing a locking assembly 4 to realize the compaction of the cylindrical base 31, the connecting column 32 and the compacting column 34;
(4) Starting the hydraulic device 2 until the soil sample is observed to be extruded to an ideal position through the compaction column, and stopping pressurizing;
(5) Then the pressure of the hydraulic device 2 is removed, the locking assembly 4 is loosened until the upright post 33 can be placed, meanwhile, the connecting post 32 and the pressing post 34 are separated, the sealing plate 35 and the angle piece 36 are removed by a sideslip method, and then the sealing plate 35 and the angle piece 36 are reinstalled and adjusted to be horizontal;
(6) Pouring a loess, lightly compacting, installing the upright post 33 between the connecting post 32 and the compacting post 34, re-fastening the locking assembly 4, starting the hydraulic device 2, and stopping pressurizing until the soil sample is observed to be extruded to a desired position through the upright post 33;
(7) Preparing soil layers such as a third layer, a fourth layer and a fifth layer based on the steps (5) and (6) and changing the operation step of separating the connecting column and the compacting column in the step (5) into separating the connecting column and the upright column;
(8) When the final layer of sample is manufactured, the pressure of the hydraulic device 2 is removed, the locking component 4 is loosened until the final layer of stand column 33 can be placed, the connecting column 32 and the stand column are separated, the sealing plate 35 and the angle piece 36 are removed by a sideslip method,
the angle piece 36 is replaced by a horizontal angle piece 36 and adjusted to be horizontal;
(9) Pouring the last loess, lightly compacting, installing the upright post 33 between the connecting post 32 and the compacting post 34, re-fastening the locking assembly 4, starting the hydraulic device 2, and stopping pressurizing until the soil sample is observed to be extruded to a desired position through the upright post 33;
(10) When the device is disassembled, the locking component 4 is completely loosened, the sample preparation component 3 and the soil sample are completely taken out through a sideslip method, the pressure of the hydraulic device 2 is removed, all the components are cleaned, and then the components are wiped dry for next use.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (5)
1. A fluid pressure type multi-angle layering triaxial sample system appearance ware, its characterized in that: the sample preparation device comprises a base, a hydraulic device, a sample preparation assembly and a locking assembly, wherein one end of the base is sealed, the other end of the base is provided with a fixing flange, a plurality of lugs are arranged on the side wall of the fixing flange, locking holes are formed in the lugs, a mounting plate is further arranged in the middle of the fixing flange, the hydraulic device is arranged in an inner cavity of the base, the sample preparation assembly comprises a cylindrical base, a connecting column, a plurality of stand columns, a compression column, a sealing plate and an angle piece, the cylindrical base, the connecting column, the stand columns and the compression column are sequentially overlapped, the cylindrical base is mounted on the mounting plate, the sealing plate is arranged in the cylindrical base and is located away from the end of the connecting column, the angle piece is arranged on the upper end face of the sealing plate, and the locking assembly is used for compressing the sample preparation assembly;
the butt joint end of the cylindrical base and the connecting column is provided with an inner conical step, one end of the connecting column is provided with a first conical surface matched with the inner conical step, the other end of the connecting column is provided with a first concave ring, one end of the upright column is provided with a first convex ring, the other end of the upright column is provided with a second concave ring, the matched end of the compression column and the upright column is provided with a second convex ring, the first concave ring is matched with the first convex ring, and the second concave ring is matched with the second convex ring;
the locking assembly comprises a pressing plate, a fixing plate, a locking bolt and a connecting bolt, wherein the pressing plate passes through the locking hole through the locking bolt to be connected with the base, the fixing plate is fixed on the pressing plate through the connecting bolt, and a round hole for embedding the compression column is formed in the middle of the fixing plate;
the fixing plate consists of two fixing blocks, four mounting holes are formed in each of the two fixing blocks, a second conical surface is formed in the inner side of each round hole, a third conical surface is formed at the matched end of each compression column and each round hole, and the second conical surfaces are matched with the third conical surfaces;
and a sealing ring is arranged on the side wall of the sealing plate.
2. The hydraulic multi-angle layered triaxial sample applicator according to claim 1, characterized in that: the hydraulic device comprises a hydraulic jack and a hydraulic pump, the hydraulic jack is arranged in the base, the top end of a piston rod of the hydraulic jack is in contact with the sealing plate, the hydraulic pump is connected with the hydraulic jack, and the hydraulic pump is arranged outside the base.
3. The hydraulic multi-angle layered triaxial sample applicator according to claim 1, characterized in that: the angle range of the angle piece is 0-60 degrees.
4. The hydraulic multi-angle layered triaxial sample applicator according to claim 1, characterized in that: the mounting plate is arranged in the mounting groove.
5. A sample preparation method using the hydraulic multi-angle layered triaxial sample preparation device according to claim 1, characterized in that: the method comprises the following steps:
(1) Firstly, installing a hydraulic device in the base, and then placing an installation disc;
(2) Coating vaseline on the inner surfaces of the cylindrical base, the connecting column and the compacting column, mounting the cylindrical base on the mounting plate, mounting the connecting column on the cylindrical base, mounting the compacting column on the connecting column, sequentially placing the sealing plate and the angle piece into the cylindrical base, and adjusting the sealing plate to be horizontal;
(3) Pouring a single red soil sample, lightly compacting by means of a tool, and installing a locking assembly to realize compaction of the cylindrical base, the connecting column and the compacting column;
(4) Starting the hydraulic device until the soil sample is observed to be extruded to an ideal position through the compaction column, and stopping pressurizing;
(5) Then the pressure of the hydraulic device is removed, the locking assembly is loosened until the upright post can be placed, meanwhile, the connecting post and the compression post are separated, the sealing plate and the angle piece are removed by a sideslip method, and then the sealing plate and the angle piece are reinstalled and adjusted to be horizontal;
(6) Pouring a loess, lightly compacting, installing the upright post between the connecting post and the compacting post, re-fastening the locking assembly, starting the hydraulic device, and stopping pressurizing until the soil sample is observed to be extruded to an ideal position through the upright post;
(7) Preparing soil layers such as a third layer, a fourth layer and a fifth layer based on the steps (5) and (6) and changing the operation step of separating the connecting column and the compacting column in the step (5) into separating the connecting column and the upright column;
(8) When the last layer of sample is manufactured, the pressure of the hydraulic device is removed, the locking assembly is loosened until the last layer of stand column can be placed, the connecting column and the stand column are separated, the sealing plate and the angle piece are removed by a sideslip method, and the angle piece is replaced by a horizontal angle piece and is adjusted to be horizontal;
(9) Pouring the last loess, lightly compacting, installing the upright post between the connecting post and the compacting post, re-fastening the locking assembly, starting the hydraulic device, and stopping pressurizing until the soil sample is observed to be extruded to an ideal position through the upright post;
(10) When the device is disassembled, the locking assembly is completely loosened, the sample preparation assembly and the soil sample are completely taken out through a sideslip method, the pressure of the hydraulic device is relieved, all the parts are cleaned, and then the parts are wiped dry for next use.
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