CN113125221B - Triaxial test sample preparation device and sample preparation method thereof - Google Patents
Triaxial test sample preparation device and sample preparation method thereof Download PDFInfo
- Publication number
- CN113125221B CN113125221B CN202110375273.4A CN202110375273A CN113125221B CN 113125221 B CN113125221 B CN 113125221B CN 202110375273 A CN202110375273 A CN 202110375273A CN 113125221 B CN113125221 B CN 113125221B
- Authority
- CN
- China
- Prior art keywords
- valve
- cylinder
- height
- cavity
- valves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a triaxial test sample preparation device and a sample preparation method thereof, wherein the triaxial test sample preparation device comprises a base, a three-valve, a hoop, a lower cylinder, an upper cylinder and a compaction hammer; the three-valve is a three-axis test sample preparation mould, and the three-valve is formed by sequentially connecting three valves to form a cylinder shape; the base is used for fixing the three valves and preventing the three valves from displacement or dislocation; the hoop is slidably sleeved in the middle of the tri-valve and used for fixing the tri-valve; the lower cylinder is used as a first extending cylinder of the three-valve, the upper cylinder is used as a second extending cylinder of the three-valve, and the lower part of the upper cylinder is nested at the top of the lower cylinder; the compaction hammer is I-shaped and is used for compacting the sample in the sample preparation device. According to the triaxial test sample preparation device and the sample preparation method thereof, the test sample is prepared by adopting a three-time compaction method, so that the prepared sample can be ensured to be uniform and compact, and the measurement error of a triaxial test is reduced; and has the characteristics of low equipment cost, simple assembly and simple and efficient use.
Description
Technical Field
The invention provides a triaxial test sample preparation device and a sample preparation method thereof, and belongs to the technical field of geotechnical engineering test devices.
Background
The traditional sample preparation method of the triaxial test has the advantages that the assembled three-valve membrane is placed on the base and fixed by the hoop, the soil sample in the three-valve membrane is compacted by adopting a layered compaction mode, the same hammering compaction times are required to be adopted in each layered compaction in the sample preparation process, and the sample preparation method is rapid in sample preparation and easy to operate. However, the method has the disadvantages that the hammering compaction times of each layer are difficult to accurately control in the compaction process, so that when the layered compaction is carried out according to the uniform hammering times, the prepared samples are not uniform in height, the uniform compactness and uniformity of the samples are difficult to control, and the measurement results of a triaxial test carried out later are greatly influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention needs to provide a triaxial test sample preparation device and a sample preparation method thereof, which are used for solving the technical problems that the heights of the prepared samples are not uniform, and the compactness and uniformity of the samples are difficult to control and uniform in the prior art.
According to the embodiment of the invention, the triaxial test sample preparation device comprises a base, a tri-valve, a hoop, a lower cylinder, an upper cylinder and a compaction hammer. The three-valve is a triaxial test sample preparation mould, the three-valve is formed by sequentially connecting three valves to enclose a cylinder, the overall diameter of the inner cavity of the three-valve is equal, the three-valve is averagely divided into an upper half part and a lower half part, the wall thickness of the upper half part of the three-valve gradually becomes thick from top to bottom, and the overall wall thickness of the lower half part of the three-valve is equal. The base, the base is used for fixing three valves prevent three valves from taking place displacement or dislocation, the base upper end have with three valve bottom complex recess I, three valve bottoms are placed in recess I. The hoop is sleeved at the middle part of the tri-valve in a sliding manner and used for fixing the tri-valve. The lower cylinder is used as a first extending cylinder of the three-valve, the lower part of the lower cylinder is matched with the top of the three-valve, the lower part of the lower cylinder is fixedly nested at the top of the three-valve, the inner diameter of the lower cylinder is consistent with the inner diameter of the three-valve, and the height of the inner cavity of the lower cylinder is 1/3 of the height of the three-valve. The upper cylinder is used as a second extending cylinder of the three valves, the lower part of the lower cylinder is matched with the lower part of the upper cylinder, the lower part of the upper cylinder is nested at the top of the lower cylinder, the upper part of the upper cylinder is a flat annular surface, the inner diameter of the upper cylinder is consistent with that of the lower cylinder, and the height of the inner cavity of the upper cylinder is 1/3 of the height of the three valves. The compaction hammer is used for compacting a sample and is I-shaped, the compaction hammer comprises a hammer handle, a supporting rod and a hammer head, the overall height of the supporting rod and the hammer head is 2/3 of the height of the inner cavity of the three-valve, and the outer diameter of the hammer head is smaller than the inner diameter of the three-valve.
In the triaxial test of the soil sample, because a lower cylinder, an upper cylinder and a compaction hammer are matched with three valves to be used as the sample preparation device, the compaction hammer with the integral height of 2/3 of the inner cavity height of the three valves is matched with the complete cavity of the three valves to carry out first compaction through the whole height of a support rod and a hammer head; the compaction hammer is matched with the lower cylinder and a first cavity which is formed by the residual cavities of the three valves and has the same height with the overall cavity of the three valves for secondary compaction; the compaction hammer is matched with the upper cylinder, the lower cylinder and the three-valve residual cavity to form a second cavity with the same height as the three-valve integral cavity for carrying out third compaction; the test sample is manufactured by adopting a three-time compaction method, so that the compaction height of each compaction is consistent with the quality of the compacted soil sample, the uniform compaction of the sample is ensured, the influence of the nonuniformity of the sample on the triaxial test is reduced, and the measurement error of the triaxial test is reduced.
In some embodiments, the lower cylindrical portion has an indent i for mating with the tri-valve top, the lower cylindrical portion is fixedly nested in the tri-valve top by the indent i, and the upper cylindrical portion has an upper protrusion; the lower part of the upper cylinder is provided with an inner recess II, the inner recess II at the lower part of the upper cylinder is matched with the upper projection at the top of the lower cylinder, and the lower part of the upper cylinder is nested at the top of the lower cylinder.
In some embodiments, one side of each of the three valves is provided with a protrusion, the other side of each of the three valves is provided with a groove, and two adjacent valves are nested and fixed by the mutual cooperation of the protrusion and the groove.
In some embodiments, the base groove i inner diameter is equal to the base outer diameter of the tri-valve.
In some embodiments, the diameter of the compaction hammer head is 1-1.5 mm smaller than the inner diameter of the three-valve.
In some embodiments, the upper cylinder and lower cylinder each have a wall thickness of 3 to 5mm.
In some embodiments, the sample preparation method comprises the steps of:
s1: firstly, equally dividing a prepared soil sample into three parts;
s2: placing the assembled tri-valve on the base, and covering the tri-valve with the hoop
The middle part of the valve;
s3: pouring a first soil sample into the three-valve cavity, inserting the compaction hammer into the three-valve cavity to compact the soil sample for the first time, wherein the height of the compacted sample is the height of the prepared complete sample
1/3 of the degree;
s4: taking down the compaction hammer, placing the lower cylinder at the top end of the three-valve to form a first cavity with the height consistent with that of the whole cavity of the three-valve, pouring a second soil sample into the first cavity, inserting the compaction hammer into the first cavity, and compacting the soil sample for the second time, wherein the height of the compacted sample is 2/3 of the height of the prepared whole sample;
s5: taking down the compaction hammer, installing the upper cylinder on the lower cylinder to form a second cavity with the height consistent with that of the overall cavity of the three valves, pouring a third soil sample into the second cavity, inserting the compaction hammer into the second cavity to carry out third compaction on the soil sample, and compacting the compacted soil
The sample height is the height of the prepared complete sample;
s6: and taking down the upper cylinder, the lower cylinder and the hoop, and dismantling the three valves to obtain the prepared complete sample.
The invention has the beneficial effects that:
(1) In the triaxial test of the soil sample, because a lower cylinder, an upper cylinder and a compaction hammer are adopted to be matched with three valves to be used as the sample preparation device, a test sample is prepared by adopting a three-time compaction method, so that the compaction height of each compaction is consistent with the quality of the compacted soil sample, the uniformity and the compactness of the sample are ensured, the influence of the nonuniformity of the sample on the triaxial test is reduced, and the measurement error of the triaxial test is reduced.
(2) The invention has the characteristics of low equipment cost, simple assembly and simple and efficient use.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a three-valve structure of the present invention.
Fig. 3 is a schematic view of the base structure of the present invention.
Fig. 4 is a schematic view of the structure of the lower cylinder of the present invention.
Fig. 5 is a schematic view of the upper cylinder structure of the present invention.
FIG. 6 is a schematic view of a compaction hammer of the invention.
Figure 7 is a schematic view of the first compaction of the present invention.
FIG. 8 is a schematic view of a second compaction of the present invention.
Figure 9 is a schematic representation of a third compaction of the present invention.
The reference numbers in the figures are: 1-base, 101-groove I, 2-three-valve, 3-hoop, 4-upper cylinder, 401-indent I, 402-upper bulge, 5-upper cylinder, 501-indent II, 6-compaction hammer, 601-hammer handle, 602-support rod and 603-hammer.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. They may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. The first feature being "under," "beneath," and "under" the second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1-3, a triaxial test sample preparation apparatus according to a preferred embodiment of the present invention includes a base 1, a three-flap membrane 2, a hoop 3, a lower cylinder 4, an upper cylinder 5, and a compaction hammer 6. The three-valve 2 is a triaxial test sample preparation mould, the three-valve 2 is formed by sequentially connecting three valves to form a cylinder shape, the overall diameter of an inner cavity of the three-valve 2 is equal, the three-valve 2 is averagely divided into an upper half part and a lower half part, the wall thickness of the upper half part of the three-valve 2 gradually becomes thicker from top to bottom, and the overall wall thickness of the lower half part of the three-valve 2 is equal. 1 upper end of base has with 2 bottom complex recesses I101 of bivalve, and 2 bottoms of bivalve are placed in recess I101 for fixed bivalve 2 prevents that bivalve 2 from taking place displacement or dislocation. The hoop 3 is sleeved on the middle part of the three-valve 2 in a sliding way and used for fixing the three-valve 2. The lower cylinder 4 is used as a first extending cylinder of the three-valve, the lower part of the lower cylinder 4 is matched with the top of the three-valve 2, the lower part of the lower cylinder 4 is fixedly nested at the top of the three-valve 2, the inner diameter of the lower cylinder 4 is consistent with that of the three-valve 2, and the height of the inner cavity of the lower cylinder 4 is 1/3 of the height of the three-valve 2; the upper cylinder 5 is used as a second extending cylinder of the three-valve 2, the lower portion of the upper cylinder 5 is matched with the lower portion of the lower cylinder 4, the lower portion of the upper cylinder 5 is nested at the top of the lower cylinder 4, the upper portion of the upper cylinder 5 is a flat annular surface, the inner diameter of the upper cylinder 5 is consistent with that of the lower cylinder 4, and the height of the inner cavity of the upper cylinder 5 is 1/3 of the height of the three-valve 2. The compaction hammer 6 is used for compacting a sample, the compaction hammer 6 is I-shaped, the compaction hammer 6 comprises a hammer handle 601, a support rod 602 and a hammer head 603, the overall height of the support rod 602 and the hammer head 603 is 2/3 of the height of the inner cavity of the three-valve 2, and the outer diameter of the hammer head 603 is smaller than the inner diameter of the three-valve 2.
In the triaxial test of the soil sample, because the lower cylinder, the upper cylinder and the compaction hammer are adopted to be matched with the three valves to be used as the sample preparation device, and the test sample is prepared by adopting a three-time compaction method, the compaction height of each compaction is consistent with the quality of the compacted soil sample, so that the uniformity and the compactness of the sample are ensured, the influence of the nonuniformity of the sample on the triaxial test is reduced, and the measurement error of the triaxial test is reduced.
Referring to fig. 4-5, in the present embodiment, the lower part of the lower cylinder 4 has an indent i 401 matching with the top of the three-valve 2, the lower part of the lower cylinder 4 is fixedly nested on the top of the three-valve 2 through the indent i 401, and the upper part of the lower cylinder 4 has an upper bulge 402; the lower part of the upper cylinder 5 is provided with an inner recess II 501, the inner recess II 501 of the lower part of the upper cylinder 5 is matched with the upper projection 402 of the top of the lower cylinder 4, and the lower part of the upper cylinder 5 is nested at the top of the lower cylinder 4.
In the embodiment, one side of each valve in the tri-valve 2 is provided with a protrusion, the other side of each valve in the tri-valve is provided with a groove, and two adjacent valves are nested and fixed through the mutual matching of the protrusions and the grooves.
Of course, the three-valve 2 is only given as an example to help explain the three-valve as a three-axis test sample preparation mold, and the characteristics of simple assembly and easy and efficient use are not used to limit the present invention.
In the embodiment, the inner diameter of the groove I101 of the base is equal to the outer diameter of the bottom of the three-valve membrane 2.
Of course, the above shapes are given as examples to help illustrate the fixation of the bottom of the tri-valve to prevent the tri-valve from being displaced or dislocated, and are not intended to limit the present invention.
In the embodiment, the diameter of the hammer head 603 of the compaction hammer is 1-1.5 mm smaller than the inner diameter of the three-valve 2. When the compactness requirement of the prepared sample is lower, the sample can be compacted by a method of inserting a compaction hammer and striking the top end of the compaction hammer by a rubber hammer; when the prepared sample is required to have higher compactness, the sample can be compacted by installing jacks at the upper end and the lower end of the sample preparation device.
Of course, the above shapes are given as examples only to help illustrate the uniform compaction of the soil sample by the compaction hammer extending into the tri-lobe, and are not intended to limit the present invention.
In the present embodiment, the lower cylinder 4 and the upper cylinder 5 each have a wall thickness of 3 to 5mm.
Of course, the above shapes are only given as examples to help illustrate that the test sample is made by using a three-time compaction method, the uniform compaction of the sample is ensured by controlling the compaction height of each compaction and the consistency of the quality of the compacted soil sample, so that the influence of the nonuniformity of the sample on the triaxial test is reduced, the measurement error of the triaxial test is reduced, and the prepared complete soil sample is obtained after the mold is removed.
When the sample preparation device suitable for the triaxial test provided by the invention is used for preparing a sample, the prepared sample is a cylindrical soil sample with the diameter of 39.1mm and the height of 80mm, the water content is 25%, the pore ratio is 0.85, and fluxum cohesive soil in Kunming area is used as soil for the test. The sample preparation device consists of a base 1, a three-flap membrane 2, a hoop 3, an upper cylinder 4, a lower cylinder 5 and a compaction hammer 6. The assembled tri-valve 2 is in the specification of 39.1mm in inner diameter and 80mm in height, a protrusion is arranged on one side of each valve in the tri-valve 2, a groove is arranged on the other side of each valve in the tri-valve 2, and two adjacent valves are mutually matched through the protrusion and the groove to be nested and fixed. The I internal diameter of recess on the base 1 is the same with 2 bottom external diameters sizes of three valves to this fixes 2 bottoms of three valves, prevents that three valves 2 from taking place the displacement or misplacing. The hoop 3 is sleeved into the tri-valve 2 from the top of the tri-valve 2 and fixes the tri-valve 2 at a wider position in the middle of the tri-valve 2. The compaction hammer 6 is of an I-shaped structure, the compaction hammer 6 comprises a hammer handle 601, a support rod 602 and a hammer head 603, the diameter of the hammer head 603 of the compaction hammer 6 is 38mm, the compaction hammer 6 is used for compacting a sample, the overall height of the support rod 602 and the hammer head 603 is 2/3 of the height of the inner cavity of the three-valve 2, and the outer diameter of the hammer head 603 of the compaction hammer 6 is smaller than the inner diameter of the three-valve 2. Thus, the compaction hammer 6 was pressed into the three-valve 2 to a depth of 2/3 of the height, and the test was conducted to compact the sample by hitting the tip of the compaction hammer with a rubber hammer. The lower cylinder 4 has an inner diameter of 39.1mm, and the lower portion of the lower cylinder 4 has a structure of a recess I401, by which it can be fixed to the top end of the tri-valve 2. The upper part of the lower cylinder 4 has a structure of an upper protrusion 402, which is fixed to the lower part of the upper cylinder 5. The height of the inner ring of the lower cylinder 4 is 1/3 of the height of the three valves 2, and the wall thickness is 4mm. The upper cylinder 5 has an inner diameter of 39.1mm. The lower part of the upper cylinder 5 is provided with a concave 501 structure, and the structure is mutually nested with a convex 402 structure on the top of the lower cylinder 4, so that the fixing effect is achieved. The upper part of the upper cylinder 5 is a flat ring surface, the height of the inner cavity of the upper cylinder 5 is 1/3 of the height of the three-valve 2, and the wall thickness is 4mm.
Referring to fig. 7, since the lower cylinder 4, the upper cylinder 5, the compaction hammer 6 and the three-valve 2 are used as a sample preparation device, the compaction hammer with the overall height of the support rod 602 and the hammer head 603 being 2/3 of the height of the inner cavity of the three-valve 2 is used for carrying out first compaction in the complete cavity (the overall height of the cavity of the three-valve 2) of the three-valve 2.
Referring to fig. 8, the compacting hammer is used for performing a second compaction in a first cavity (the height of the first cavity is consistent with the overall height of the cavity of the three-valve 2) formed by the lower cylinder and the residual cavities of the three-valve.
Referring to fig. 9, the compaction hammer is matched with the upper cylinder, the lower cylinder and the remaining cavity of the three-flap membrane to form a second cavity (the height of the second cavity is consistent with the height of the whole cavity of the three-flap membrane 2) with the height of the whole cavity of the three-flap membrane for carrying out third compaction; the test sample is manufactured by adopting a three-time compaction method, and the pressing depth of the compaction hammer is 2/3 of the height of the three-petal cavity each time, so that the compaction height of each compaction is ensured to be consistent with the quality of the compacted soil sample, the uniformity and the compactness of the sample are ensured, the influence of the nonuniformity of the sample on the triaxial test is reduced, and the measurement error of the triaxial test is reduced. The height after compaction by the triple valve 2 using the upper cylinder 4, lower cylinder 4 and compaction hammer 6 in combination is the full height of the sample being made. Before all devices are installed, vaseline is thinly coated on the inner wall of the three-valve 2, so that the mold can be detached conveniently, and the integrity of a sample after the mold is detached can be ensured.
According to the sample preparation method in the preferred embodiment of the present invention, a test sample is prepared by using the sample preparation device described above: firstly, equally dividing the prepared soil sample into three parts. The assembled three-valve 2 is placed on the base 1, and the middle part of the three-valve 2 is sleeved by the hoop 3. Pouring a first soil sample into the three-valve 2, inserting the compaction hammer 6 into the three-valve 2 to compact the soil for the first time, wherein the sample height is 1/3 of the prepared complete sample height. And placing the lower cylinder 4 at the top end of the three-valve 2 to form a first cavity with the height consistent with that of the whole cavity of the three-valve 2, pouring a second soil sample into the first cavity, inserting the compaction hammer 6 into the first cavity to compact the soil sample for the second time, wherein the height of the compacted sample is 2/3 of the height of the prepared complete sample. And taking down the compaction hammer 6, installing the upper cylinder 5 on the lower cylinder 4 to form a second cavity with the height consistent with that of the whole cavity of the three-valve 2, pouring a third soil sample into the second cavity, inserting the compaction hammer into the second cavity, and compacting the soil sample for the third time, wherein the height of the compacted soil sample is the height of the prepared complete sample. And taking down the upper cylinder 4, the lower cylinder 5 and the hoop 2, and removing the three-piece membrane to obtain the prepared complete soil sample.
In the triaxial test of the soil sample, because a lower cylinder, an upper cylinder and a compaction hammer are matched with a three-valve to be used as the sample preparation device, the compaction hammer with the integral height of 2/3 of the inner cavity height of the three-valve is matched with a three-valve complete cavity to carry out first compaction through the whole height of a supporting rod and a hammer head; the compaction hammer is matched with the lower cylinder and the first cavity which is formed by the residual cavities of the three-clack membrane and has the same height with the overall cavity of the three-clack membrane to carry out secondary compaction; the compaction hammer is matched with the upper cylinder, the lower cylinder and a second cavity formed by the residual cavities of the three-clack membrane and having the same height with the overall cavity of the three-clack membrane to carry out third compaction; the test sample is manufactured by adopting a three-time compaction method, and the pressing depth of the compaction hammer is 2/3 of the height of the three-petal cavity every time, so that the compaction height of compaction at every time is ensured to be consistent with the quality of the compacted soil sample, the uniformity and the compactness of the sample are ensured, the influence of the nonuniformity of the sample on the triaxial test is reduced, and the measurement error of the triaxial test is reduced.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. The utility model provides a triaxial test system appearance device which characterized in that includes:
the three-valve is a triaxial test sample preparation mould, three valves are sequentially connected to form a cylinder, the overall diameters of inner cavities of the three valves are equal, the three valves are averagely divided into an upper half part and a lower half part, the wall thickness of the upper half part of the three valves is gradually thickened from top to bottom, and the overall wall thickness of the lower half part of the three valves is equal;
the base is used for fixing the three valves and preventing the three valves from displacing or dislocating, a groove I matched with the bottoms of the three valves is formed in the upper end of the base, and the bottoms of the three valves are placed in the groove I;
the hoop is sleeved at the middle part of the tri-valve in a sliding manner and is used for fixing the tri-valve;
the lower cylinder is used as a first extending cylinder of the three-valve, the lower part of the lower cylinder is matched with the top of the three-valve, the lower part of the lower cylinder is fixedly nested at the top of the three-valve, the inner diameter of the lower cylinder is consistent with the inner diameter of the three-valve, and the height of the inner cavity of the lower cylinder is 1/3 of the height of the three-valve;
the upper cylinder is used as a second extending cylinder of the three-valve, the lower part of the upper cylinder is matched with the lower part of the lower cylinder, the lower part of the upper cylinder is nested at the top of the lower cylinder, the upper part of the upper cylinder is a flat annular surface, the inner diameter of the upper cylinder is consistent with that of the lower cylinder, and the height of the inner cavity of the upper cylinder is 1/3 of the height of the three-valve;
the compaction hammer is used for compacting a sample, is I-shaped and comprises a hammer handle, a support rod and a hammer head, the overall height of the support rod and the hammer head is 2/3 of the height of the inner cavity of the three-valve, and the outer diameter of the hammer head is smaller than the inner diameter of the three-valve;
the method for preparing the sample by using the triaxial test sample preparation device comprises the following steps:
s1: firstly, equally dividing a prepared soil sample into three parts;
s2: placing the assembled tri-valve on the base, and covering the middle part of the tri-valve with the hoop;
s3: pouring a first soil sample into the three-valve cavity, inserting the compaction hammer into the three-valve cavity to compact the soil sample for the first time, wherein the height of the compacted sample is 1/3 of the height of the prepared complete sample;
s4: taking down the compaction hammer, placing the lower cylinder at the top end of the three-valve to form a first cavity with the height consistent with that of the whole cavity of the three-valve, pouring a second soil sample into the first cavity, inserting the compaction hammer into the first cavity to compact the soil sample for the second time, wherein the height of the compacted sample is 2/3 of the height of the prepared complete sample;
s5: taking down the compaction hammer, mounting the upper cylinder on the lower cylinder to form a second cavity with the height consistent with that of the overall cavity of the three-valve, pouring a third soil sample into the second cavity, inserting the compaction hammer into the second cavity to carry out third compaction on the soil sample, wherein the height of the compacted soil sample is the height of the prepared complete sample;
s6: and taking down the upper cylinder, the lower cylinder and the hoop, and dismantling the three valves to obtain the prepared complete sample.
2. The triaxial test sample preparation device according to claim 1, wherein the lower part of the lower cylinder has an indent i matched with the top of the tri-valve, the lower part of the lower cylinder is fixedly nested in the top of the tri-valve through the indent i, and the upper part of the lower cylinder has an upper bulge; the lower part of the upper cylinder is provided with an inner recess II, the inner recess II at the lower part of the upper cylinder is matched with the upper projection at the top of the lower cylinder, and the lower part of the upper cylinder is nested at the top of the lower cylinder.
3. The triaxial test sample preparation device according to claim 1, wherein a protrusion is provided on one side of each of the three valves, a groove is provided on the other side of each of the three valves, and two adjacent valves are nested and fixed by the mutual fit of the protrusion and the groove.
4. The triaxial test sample preparation device according to claim 1, wherein the inner diameter of the base groove I is equal to the outer diameter of the bottom of the tri-valve.
5. The triaxial test sample preparation device according to claim 1, wherein the diameter of the compaction hammer head is 1-1.5 mm smaller than the inner diameter of the tri-valve.
6. The triaxial test sample preparation device according to claim 2, wherein the wall thickness of each of the upper cylinder and the lower cylinder is 3 to 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375273.4A CN113125221B (en) | 2021-04-08 | 2021-04-08 | Triaxial test sample preparation device and sample preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375273.4A CN113125221B (en) | 2021-04-08 | 2021-04-08 | Triaxial test sample preparation device and sample preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113125221A CN113125221A (en) | 2021-07-16 |
| CN113125221B true CN113125221B (en) | 2022-10-28 |
Family
ID=76775351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110375273.4A Active CN113125221B (en) | 2021-04-08 | 2021-04-08 | Triaxial test sample preparation device and sample preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113125221B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414320B (en) * | 2021-12-01 | 2023-11-24 | 上海工程技术大学 | Static pressure rapid sample preparation device for triaxial test, sample preparation method and demolding method |
| CN114166602A (en) * | 2021-12-03 | 2022-03-11 | 西京学院 | Triaxial test soil sample manufacturing device and sample manufacturing method |
| CN115420576B (en) * | 2022-11-04 | 2023-03-24 | 成都理工大学 | Discrete dynamic triaxial test sample preparation device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4420228A (en) * | 1980-06-12 | 1983-12-13 | Humphrey Instruments, Inc. | Method and apparatus for analysis of corneal shape |
| US4819739A (en) * | 1984-08-31 | 1989-04-11 | Dresser Industries, Inc. | Fluid actuated rock drill hammer |
| EP1489025A2 (en) * | 1996-11-26 | 2004-12-22 | United Parcel Service Of America, Inc. | Apparatus for gripping packages of random size and weight |
| JP2005256258A (en) * | 2004-03-09 | 2005-09-22 | Teruko Watabe | Skirt |
| CN107101855A (en) * | 2017-04-26 | 2017-08-29 | 桂林理工大学 | Manipulated soil compaction in layers sample preparation device and its method for indoor triaxial test |
| CN206696054U (en) * | 2017-04-26 | 2017-12-01 | 桂林理工大学 | A kind of manipulated soil compaction in layers sample preparation device for indoor triaxial test |
| CN107478480A (en) * | 2017-09-08 | 2017-12-15 | 长安大学 | A kind of more specification geotechnical sample sample preparation devices of combined type |
| CN108427836A (en) * | 2018-03-02 | 2018-08-21 | 江西理工大学 | A kind of assay method for determining ion type rareearth individual well fluid injection coverage under head condition |
| CN109516733A (en) * | 2019-01-24 | 2019-03-26 | 山西省交通科学研究院有限公司 | A kind of freeze proof pervious concrete of alkali-activated slag/flyash and preparation method thereof |
| CN209086023U (en) * | 2018-07-28 | 2019-07-09 | 浙江大学城市学院 | A kind of preparation facilities of soil test cohesiveless soil sample |
| CN111103185A (en) * | 2020-01-13 | 2020-05-05 | 石河子大学 | Spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method |
| CN210690181U (en) * | 2019-09-23 | 2020-06-05 | 安徽理工大学 | Novel geotechnical test sample preparation device |
| CN112014190A (en) * | 2020-09-18 | 2020-12-01 | 广州大学 | Geotechnical triaxial test sample hitting device and method |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288461B (en) * | 2011-05-12 | 2013-04-10 | 河海大学 | Large-sized hollow cylindrical sampler for coarse grained soil and use method thereof |
| CN202393634U (en) * | 2011-12-02 | 2012-08-22 | 孙猛 | Triaxial experimental test sample preparation die |
| CN103471894B (en) * | 2013-09-27 | 2015-12-09 | 山东科技大学 | Pedal telescopic earth sample compacting device three lobe cylinder locked instrument |
| CN203551349U (en) * | 2013-10-15 | 2014-04-16 | 上海理工大学 | Zigzag bivalve mold cylinder body device for specimen preparation |
| CN103728153B (en) * | 2013-12-24 | 2016-05-25 | 中山大学 | The directed miniature sampler of bury |
| CN203745255U (en) * | 2014-01-16 | 2014-07-30 | 昆明理工大学 | Sample cutter for preparing sample of soft soil triaxial test |
| CN103837385B (en) * | 2014-02-28 | 2016-03-16 | 河海大学 | Coarse-grained soil high polymer grouting triaxial test sample preparation device and using method thereof |
| CN104006992B (en) * | 2014-05-22 | 2016-06-15 | 西南交通大学 | Symmetrical layering pressure-like device and method for making sample prepared by a kind of triaxial test sample |
| CN204101347U (en) * | 2014-09-18 | 2015-01-14 | 华北水利水电大学 | A kind of controlling density formula geotechnique three axle sample preparation devices |
| CN104198254B (en) * | 2014-09-18 | 2016-06-29 | 华北水利水电大学 | Controlling density formula geotechnique's three axle sample preparation devices |
| CN104390821B (en) * | 2014-11-13 | 2017-02-15 | 大连理工大学 | Triaxial test soil sample preparation system |
| CN104913959B (en) * | 2015-06-10 | 2018-02-16 | 温州大学 | High leakproofness sample preparation device and its method for making sample |
| CN105067407B (en) * | 2015-08-14 | 2017-03-29 | 昆明理工大学 | A kind of triaxial rheology experiment automatic sample saturation device of tailings material |
| CN105181416A (en) * | 2015-10-12 | 2015-12-23 | 北京工业大学 | High-visualization geotechnical triaxial test sample device and manufacturing method |
| CN205374122U (en) * | 2016-01-13 | 2016-07-06 | 中南大学 | Triaxial test remolded sample's quick preparation facilities |
| CN206096001U (en) * | 2016-09-26 | 2017-04-12 | 桂林理工大学 | Simulating measurement setup |
| CN206832542U (en) * | 2017-03-10 | 2018-01-02 | 上海大学 | A kind of preparation facilities of the geotechnological three axle samples of Bidirectional-pressure |
| CN207248587U (en) * | 2017-09-08 | 2018-04-17 | 长安大学 | Modular geotechnical sample sample preparation device |
| CN207472630U (en) * | 2017-10-12 | 2018-06-08 | 中国地质大学（武汉） | A kind of curing sludge laboratory test sample preparation device |
| CN208283107U (en) * | 2018-06-26 | 2018-12-25 | 西安建筑科技大学 | A kind of large-scale cutting ring of large size intact loess sampling |
| CN208399233U (en) * | 2018-07-10 | 2019-01-18 | 敦煌研究院文物保护技术服务中心 | Be used to prepare disturbance soil sample hits sample device |
| CN108663249B (en) * | 2018-07-28 | 2023-08-18 | 浙江大学城市学院 | Preparation device and preparation method of non-cohesive soil sample for geotechnical test |
| CN109470537A (en) * | 2018-12-19 | 2019-03-15 | 桂林理工大学 | A kind of novel three axis sample layering preparation facilities |
| CN209820977U (en) * | 2019-02-20 | 2019-12-20 | 陕西天地地质有限责任公司 | Instrument suitable for large-particle-size soil compaction test |
| CN110333110A (en) * | 2019-06-11 | 2019-10-15 | 河海大学 | A kind of closely knit grittiness preparation of soil sample device of triaxial test |
| CN212363853U (en) * | 2020-07-02 | 2021-01-15 | 兰州交通大学 | Split type three-axis sample preparation device |
-
2021
- 2021-04-08 CN CN202110375273.4A patent/CN113125221B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4420228A (en) * | 1980-06-12 | 1983-12-13 | Humphrey Instruments, Inc. | Method and apparatus for analysis of corneal shape |
| US4819739A (en) * | 1984-08-31 | 1989-04-11 | Dresser Industries, Inc. | Fluid actuated rock drill hammer |
| EP1489025A2 (en) * | 1996-11-26 | 2004-12-22 | United Parcel Service Of America, Inc. | Apparatus for gripping packages of random size and weight |
| JP2005256258A (en) * | 2004-03-09 | 2005-09-22 | Teruko Watabe | Skirt |
| CN107101855A (en) * | 2017-04-26 | 2017-08-29 | 桂林理工大学 | Manipulated soil compaction in layers sample preparation device and its method for indoor triaxial test |
| CN206696054U (en) * | 2017-04-26 | 2017-12-01 | 桂林理工大学 | A kind of manipulated soil compaction in layers sample preparation device for indoor triaxial test |
| CN107478480A (en) * | 2017-09-08 | 2017-12-15 | 长安大学 | A kind of more specification geotechnical sample sample preparation devices of combined type |
| CN108427836A (en) * | 2018-03-02 | 2018-08-21 | 江西理工大学 | A kind of assay method for determining ion type rareearth individual well fluid injection coverage under head condition |
| CN209086023U (en) * | 2018-07-28 | 2019-07-09 | 浙江大学城市学院 | A kind of preparation facilities of soil test cohesiveless soil sample |
| CN109516733A (en) * | 2019-01-24 | 2019-03-26 | 山西省交通科学研究院有限公司 | A kind of freeze proof pervious concrete of alkali-activated slag/flyash and preparation method thereof |
| CN210690181U (en) * | 2019-09-23 | 2020-06-05 | 安徽理工大学 | Novel geotechnical test sample preparation device |
| CN111103185A (en) * | 2020-01-13 | 2020-05-05 | 石河子大学 | Spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method |
| CN112014190A (en) * | 2020-09-18 | 2020-12-01 | 广州大学 | Geotechnical triaxial test sample hitting device and method |
Non-Patent Citations (4)
| Title |
|---|
| A Novel Positioning and Orientation System Based on Three-Axis Magnetic Coils;Chao Hu et，;《IEEE TRANSACTIONS ON MAGNETICS》;20120731;第2211-2219页 * |
| Analgesic Effects Evoked by Real and Imagined Acupuncture: A Neuroimaging Study;Jin Cao et，;《Cerebral Cortex》;20190831;第3220-3231页 * |
| 不同先期固结压力下的错动带力学特性研究;段淑倩 等，;《岩土力学》;20170131;第49-60页 * |
| 高分解度泥炭土直剪抗剪强度特性及机理;桂跃 等，;《河海大学学报（自然科学版）》;20160930;第418-426页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113125221A (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113125221B (en) | Triaxial test sample preparation device and sample preparation method thereof | |
| CN111103185B (en) | Spinning coarse-grained soil triaxial experiment sample preparation device and sample preparation method | |
| CN104913959A (en) | High-airtightness sample preparation device and sample preparation method thereof | |
| CN104006992A (en) | Symmetrical layered sample pressing device for triaxial test sample preparation and sample preparation method | |
| CN103278360B (en) | Reserved chamber simulating test piece manufacturing die assembly and method used for manufacturing test piece | |
| CN111999155A (en) | A test piece static pressure forming device for geotechnique triaxial compression test | |
| CN106959231B (en) | Device for quickly preparing remolded soil | |
| CN102539655A (en) | Mold for measuring horizontal direction contract value of concrete | |
| CN105067405B (en) | A kind of quick molding method of similar materials mould assembly and its standard specimen | |
| CN203551349U (en) | Zigzag bivalve mold cylinder body device for specimen preparation | |
| CN213456360U (en) | Quick frozen soil sample preparation device | |
| CN210180783U (en) | A test piece static pressure forming device for geotechnique triaxial compression test | |
| CN203869923U (en) | Symmetrical layered sample pressing equipment for triaxial test sample preparation | |
| CN214081979U (en) | Test block manufacturing tool | |
| CN210243315U (en) | Sand resonance column test sample preparation device | |
| CN204944909U (en) | A kind of similar materials mould assembly | |
| CN108760426B (en) | Static pressure method triaxial sample preparation device and method | |
| CN208223922U (en) | A kind of three axis sample preparation device of static pressure method | |
| CN206648875U (en) | Analog material constant pressure is into die device | |
| CN209911076U (en) | Preparation device for roadbed soil test piece | |
| CN213481862U (en) | Static pressure die for two ends of cylindrical sample with graduated scale | |
| CN214096863U (en) | Device for manufacturing cement stability test cake | |
| CN221238726U (en) | Sample preparation ware suitable for geotechnique triaxial test | |
| CN114720224A (en) | Triaxial sample preparation device and test method for rock similar material | |
| CN118150313A (en) | Geotechnical triaxial test device and geotechnical triaxial test method for eliminating end constraint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |