CN115248144A - Triaxial test soil sample manufacturing device and sample manufacturing method - Google Patents
Triaxial test soil sample manufacturing device and sample manufacturing method Download PDFInfo
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- CN115248144A CN115248144A CN202210022081.XA CN202210022081A CN115248144A CN 115248144 A CN115248144 A CN 115248144A CN 202210022081 A CN202210022081 A CN 202210022081A CN 115248144 A CN115248144 A CN 115248144A
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- compaction
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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
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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
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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
- G01N2001/2866—Grinding or homogeneising
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- Sampling And Sample Adjustment (AREA)
Abstract
A triaxial test soil sample manufacturing device and a sample manufacturing method are disclosed, wherein the device comprises a die fixing assembly, a sleeve assembly and a compaction assembly which are sequentially arranged from bottom to top; the method comprises the steps of dividing loose soil into a plurality of parts according to the manufacturing requirement for later use, planing a soil sample in a three-piece mold, sleeving a sleeve, taking an aliquot of the divided loose soil, adding the aliquot of the divided loose soil into the three-piece mold by using a sliding spoon, and shaking to enable the loose soil in the three-piece mold to be spread; then inserting the compaction component into the three-piece mold from the upper part of the sleeve, lifting the handle to repeatedly strike, and compacting layer by layer to complete the soil sample manufacturing; the invention has the advantages of reasonable structure, simple operation, practicality and high efficiency.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering tests, and particularly relates to a triaxial test soil sample manufacturing device and a sample manufacturing method.
Technical Field
The existing triaxial test soil sample preparation has an artificial sample preparation device and a mechanical auxiliary sample preparation device. The manual sample preparation device is simple, convenient to use and low in purchase cost, and has the advantages compared with mechanical auxiliary sample preparation devices. Therefore, the manual sample preparation device is still the most widely used triaxial soil sample preparation device at present. However, the manual sample preparation device has great influence on the triaxial test of the soil sample, and even failure is often caused, so that waste of people and properties is caused. Next, the problems involved in the sample preparation process by the manual sample preparation device will be described in detail.
The triaxial soil sample manual sample preparation device is used for dividing the bulk soil of a triaxial test soil sample into 3 to 4 equal parts, and then compacting the total height of 1/3 or 1/4 of the sample by each part in a layering manner. Because the sliding rod of the hand-held compaction hammer is used during compaction, the sliding rod cannot be absolutely perpendicular to the target compaction surface, and therefore, the regions of the compaction surface are not compacted along the central axis direction of the sample, and two problems are directly caused. Firstly, each layer of the sample is not uniformly compacted, so that the compactness of the whole sample is not uniform. Secondly, the surface of the finished product sample is not vertical to the central axis of the sample. The sample preparation quality of the rock-soil triaxial test directly influences the test result. The compactness is uneven, and the data of the test result is directly distorted; the uneven surface of the sample can cause the sample to be inclined to one side in the triaxial loading process of the soil sample, so that the test fails. In addition, in the sample preparation process of the existing manual sample preparation mold, layered compaction is carried out, repeated measurement is needed in order to control the compaction thickness of each layer as much as possible, and careful compaction is carried out, so that excessive compaction or insufficient compaction is avoided, and the sample preparation efficiency is low.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a triaxial test soil sample manufacturing device and a sample manufacturing method, which can simplify the sample manufacturing process, realize rapid sample manufacturing, ensure uniform density of triaxial soil samples, and have the advantages of reasonable structure, simplicity in operation, practicability and high efficiency.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a triaxial test soil sample manufacturing device comprises a mold fixing component, a sleeve component is detachably connected above the mold fixing component, and a compaction component is movably connected with the mold fixing component and the sleeve component from above; the mould fixing component comprises a three-section mould 2, a hoop 3 is sleeved on the outer side of the waist of the three-section mould 2, the bottom of the three-section mould 2 is installed on a base 1, an upper sleeve ring 4 is sleeved on the top of the three-section mould 2, and the base 1 and the upper sleeve ring 4 are fixedly connected through a fastening pull rod 5.
The sleeve assembly comprises a plurality of stackable sleeves 6.
The compaction component comprises a sliding rod 7, a handle is arranged at the top of the sliding rod 7, the bottom of the sliding rod 7 penetrates through the center of a compaction hammer 8 and is fixedly screwed with a boss 12 at the top of a compaction head 9, and the bottom of the compaction head 9 extends into a part matched with the three-petal mold 2, the upper lantern ring 4 and the inner cylinder of the sleeve 6.
The number of the sleeves 6 is 2-4.
The compacting head 9 extends completely into the three-segment mould 2 for the same length as the three-segment mould 2.
The top of the upper lantern ring 4 and the top of the sleeve 6 are provided with convex grooves 10, and the bottom of the sleeve 6 is provided with grooves 11 matched with the convex grooves 10.
A sample preparation method based on a triaxial test soil sample preparation device specifically comprises the following steps:
firstly, dividing loose soil into a plurality of parts for standby according to the manufacturing requirement;
secondly, moving the sleeve 6 away, taking a part of the scattered soil which is equally divided in the first step, adding the scattered soil into the three-piece mold 2 by using a sliding spoon, and shaking to enable the scattered soil in the three-piece mold 2 to be spread;
thirdly, inserting the compaction component into the hoop 4, lifting the handle to strike downwards, sliding the compaction hammer 10 on the sliding rod 7 to apply force, compacting the loose soil in the three-piece mold 2 together with the compaction head 9 until the boss 12 at the top of the compaction head 9 abuts against the top of the upper hoop 4, and completing compaction of the first layer;
fourthly, taking out the compaction component, planing the soil sample in the three-piece mold 2, sleeving a sleeve 6, taking a part of the scattered soil which is equally divided in the first step, adding the part of the scattered soil into the three-piece mold 2 by using a sliding spoon, and shaking to enable the scattered soil in the three-piece mold 2 to be flatly paved; then inserting the compaction component into the three-piece mold 2 from the upper part of the sleeve 6, lifting the handle to compact repeatedly until the boss 12 at the top of the compaction head 9 is abutted to the sleeve 6, and completing compaction of the second layer;
fifthly, repeating the fourth step, and sequentially compacting multiple layers of soil samples according to the quantity of the equally dispersed soil until the whole soil sample is prepared;
and sixthly, after the soil sample is manufactured, taking out the compaction assembly, sequentially removing the sleeve 6, loosening the screw of the fastening pull rod 5, removing the upper lantern ring 4, taking out the soil sample in the three-piece mold 2, and finishing the sample manufacturing.
In the first step, the loose soil is divided into a plurality of parts for standby, wherein the parts are 3-5 parts.
Compared with the prior art, the invention has the beneficial effects that:
1. when the first layer is impacted, only the lug boss 12 is required to be propped against the top edge of the upper lantern ring 4, and the compaction can be completed. When the second layer is impacted, only the lug boss 12 is propped against the top edge of the sleeve 6, the compaction can be finished, and the rest can be done in the same way. The whole process does not need to repeatedly measure the compaction height of each layer, the operation is simple and convenient, and the efficiency is improved.
2. When the compaction head 9 is impacted, the compaction head 9 is inserted into the three-piece mold 2 or the sleeve 6, and the central axis of the compaction head 9 is well coincided with the central axis of the three-piece mold 2, so that the compaction surface of the soil sample is perpendicular to the central axis of the soil sample in the compaction process, and all parts are compacted homogeneously. The surface of the sample is smooth, and the situation that the soil sample is inclined when the soil sample is loaded in a triaxial test is avoided.
In conclusion, the invention has the advantages of reasonable structure, simple operation, practicality and high efficiency.
Drawings
Fig. 1 is an exploded view of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1. a base; 2. three-petal mold; 3. a hoop; 4. an upper collar; 5. fastening a pull rod; 6. a sleeve; 7. a slide bar; 8. a compaction hammer; 9. a compaction head; 10. a convex groove; 11. a groove; 12. and (4) a boss.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a sample preparation method based on a triaxial test soil sample preparation device specifically comprises the following steps:
firstly, equally dividing the loose soil into a plurality of parts for later use according to the manufacturing requirement;
secondly, moving the sleeve 6 away, taking a part of the scattered soil which is equally divided in the first step, adding the scattered soil into the three-piece mold 2 by using a sliding spoon, and shaking to enable the scattered soil in the three-piece mold 2 to be spread;
thirdly, inserting the compaction component into the hoop 4, lifting the handle to strike downwards, sliding the compaction hammer 10 on the sliding rod 7 to apply force, compacting the loose soil in the three-piece mold 2 together with the compaction head 9 until the boss 12 at the top of the compaction head 9 abuts against the top of the upper hoop 4, and completing compaction of the first layer;
fourthly, taking out the compaction component, planing the soil sample in the three-piece mold 2, sleeving a sleeve 6, taking a part of the scattered soil which is equally divided in the first step, adding the part of the scattered soil into the three-piece mold 2 by using a sliding spoon, and shaking to enable the scattered soil in the three-piece mold 2 to be flatly paved; then inserting the compaction component into the three-piece mold 2 from the upper part of the sleeve 6, lifting the handle to compact repeatedly until the boss 12 at the top of the compaction head 9 is abutted to the sleeve 6, and completing compaction of the second layer;
fifthly, repeating the fourth step, and sequentially compacting multiple layers of soil samples according to the quantity of the equally dispersed soil until the whole soil sample is prepared;
and sixthly, after the soil sample is prepared, taking out the compaction assembly, sequentially removing the sleeves 6, loosening screws of the fastening pull rods 5, removing the upper lantern rings 4, taking out the soil sample in the three-piece mold 2, and completing the sample preparation.
In the first step, the loose soil is divided into a plurality of parts for standby, wherein the parts are 3-5 parts.
In the first layer striking process, the striking can be completed only by propping the top edge of the upper lantern ring 4 by the boss 12. When the second layer is impacted, only the lug boss 12 props against the edge of the top of the sleeve 6, the compaction can be finished, and the like. The whole process does not need to repeatedly measure the compaction height of each layer, the operation is simple and convenient, and the efficiency is improved.
When the compaction head 9 is impacted, the compaction head 9 is inserted into the three-piece mold 2 or the sleeve 6, and the central axis of the compaction head 9 is well coincided with the central axis of the three-piece mold 2, so that the compaction surface of the soil sample is perpendicular to the central axis of the soil sample in the compaction process, and all parts are compacted homogeneously. The surface of the sample is smooth, and the situation that the soil sample is inclined when the soil sample is loaded in a triaxial test is avoided.
Claims (8)
1. The utility model provides a triaxial test soil sample making devices, includes the fixed subassembly of mould, its characterized in that: the connecting sleeve component can be detached above the die fixing component, and the compaction component is movably connected with the die fixing component and the sleeve component from above; the mould fixing assembly comprises a three-petal mould (2), a hoop (3) is sleeved on the outer side of the waist of the three-petal mould (2), the bottom of the three-petal mould (2) is installed on a base () 1, an upper sleeve ring (4) is sleeved on the top of the three-petal mould (2), and the base (1) and the upper sleeve ring (4) are fixedly connected through a fastening pull rod (5).
2. The triaxial test soil sample preparation device of claim 1, wherein: the sleeve assembly comprises a plurality of stackable sleeves (6).
3. The triaxial test soil sample preparation device of claim 1, wherein: the compaction component comprises a sliding rod (7), a handle is arranged at the top of the sliding rod (7), the bottom of the sliding rod (7) penetrates through the center of a compaction hammer (8) and is fixedly screwed with a boss (12) at the top of a compaction head (9), and the bottom of the compaction head (9) extends into a part to be matched with the inner cylinders of the three-petal mold (2), the upper lantern ring (4) and the sleeve (6).
4. The triaxial test soil sample preparation device of claim 1, wherein: the number of the sleeves (6) is 2-4.
5. The triaxial test soil sample preparation device of claim 1, wherein: the length of the compacting head (9) which completely extends into the three-petal mould (2) is the same as the length of the three-petal mould (2).
6. The triaxial test soil sample preparation device of claim 1, wherein: go up lantern ring (4) and sleeve (6) top and be equipped with tongue (10), sleeve (6) bottom is equipped with recess (11) with tongue (10) looks adaptation.
7. A sample preparation method based on a triaxial test soil sample preparation device is characterized by comprising the following steps: the method specifically comprises the following steps:
firstly, dividing loose soil into a plurality of parts for standby according to the manufacturing requirement;
secondly, moving the sleeve (6), taking a part of the scattered soil which is equally divided in the first step, adding the scattered soil into the three-piece mold (2) by using a sliding spoon, and shaking to enable the scattered soil in the three-piece mold (2) to be spread;
thirdly, inserting the compaction component into the hoop (4), lifting the handle to strike downwards, sliding the compaction hammer (10) on the sliding rod (7) to apply force, compacting the loose soil in the three-piece mold (2) together with the compaction head (9) until a boss (12) at the top of the compaction head (9) abuts against the top of the upper hoop (4), and completing compaction of the first layer;
fourthly, taking out the compaction component, planing the soil sample in the three-piece mold (2), sleeving a sleeve (6), taking a part of the scattered soil which is equally divided in the first step, adding the part of the scattered soil into the three-piece mold (2) by using a sliding spoon, and shaking to enable the scattered soil in the three-piece mold (2) to be spread; then inserting the compaction component into the three-piece mold (2) from the upper part of the sleeve (6), lifting the handle to compact repeatedly until the boss (12) at the top of the compaction head (9) is abutted to the sleeve (6), and compacting the second layer;
fifthly, repeating the fourth step, and sequentially compacting multiple layers of soil samples according to the quantity of the equally dispersed soil until the whole soil sample is prepared;
and sixthly, after the soil sample is manufactured, taking out the compaction assembly, sequentially removing the sleeve (6), loosening the screw of the fastening pull rod (5), removing the upper lantern ring (4), and taking out the soil sample in the three-piece mold (2) to finish the sample manufacturing.
8. The sample preparation method based on the triaxial test soil sample preparation device according to claim 7, wherein: in the first step, the loose soil is divided into a plurality of parts for standby, wherein the parts are 3-5 parts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210022081.XA CN115248144A (en) | 2022-01-10 | 2022-01-10 | Triaxial test soil sample manufacturing device and sample manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210022081.XA CN115248144A (en) | 2022-01-10 | 2022-01-10 | Triaxial test soil sample manufacturing device and sample manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115420576A (en) * | 2022-11-04 | 2022-12-02 | 成都理工大学 | Discrete dynamic triaxial test sample preparation device |
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- 2022-01-10 CN CN202210022081.XA patent/CN115248144A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115420576A (en) * | 2022-11-04 | 2022-12-02 | 成都理工大学 | Discrete dynamic triaxial test sample preparation device |
| CN115420576B (en) * | 2022-11-04 | 2023-03-24 | 成都理工大学 | Discrete dynamic triaxial test sample preparation device |
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