CN107478480B - Modular many specifications geotechnique sample system appearance device - Google Patents
Modular many specifications geotechnique sample system appearance device Download PDFInfo
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- CN107478480B CN107478480B CN201710806754.XA CN201710806754A CN107478480B CN 107478480 B CN107478480 B CN 107478480B CN 201710806754 A CN201710806754 A CN 201710806754A CN 107478480 B CN107478480 B CN 107478480B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- 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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Abstract
The invention discloses a combined type multi-specification geotechnical sample preparation device which comprises at least two vertical rods, wherein top plates capable of moving up and down along the vertical rods are arranged on the vertical rods, and through holes are formed in the middle parts of the top plates; a pressurizing device is arranged right below the top plate and is connected with an oil pump, and the oil pump can pressurize and lift the pressurizing device. The combined sleeve is formed by sleeving a large-inner-diameter sleeve with a small-inner-diameter sleeve, or formed by connecting sleeves with the same inner diameter up and down, or formed by nesting a cutting ring with the same inner diameter as the sleeve in the sleeve. During sample preparation, the combined sleeve is positioned on the pressurizing device, and the lower part of the pressure rod is positioned in the combined sleeve. When demoulding, the pressure lever is positioned on the pressurizing device, and the upper part of the pressure lever is positioned in the combined sleeve. The problem of among the prior art system appearance ware can not prepare different specification soil samples is solved. Can make appearance by the rapid Assembly, can make the cutting ring sample, can make triaxial sample again, can also carry out the drawing of patterns to the sample.
Description
Technical Field
The invention belongs to the technical field of geotechnical test sample preparation devices, and particularly relates to a combined type multi-specification geotechnical sample preparation device.
Background
In scientific research and teaching practice of geotechnical engineering, remolded soil is increasingly selected due to relatively stable property, and preparation of remolded soil samples is an essential link for geotechnical experiments. However, the conventional sample preparation device has a single function, is low in integration level and is difficult to accurately control pressure.
In order to meet the requirements of actual engineering and scientific research, the technical problem to be solved is how to design the geotechnical sample preparation device which has multiple functions and high integration level and can accurately reflect the pressure value.
Disclosure of Invention
The invention aims to provide a combined type multi-specification soil sample preparation device, which solves the problems that a remolded soil sample preparation device in the prior art has single function and can not prepare various soil samples with different specifications. Can make appearance by the rapid Assembly, can make the cutting ring sample, can make triaxial sample again, can also carry out the drawing of patterns to the sample.
In order to achieve the purpose, the invention adopts the following technical scheme:
a combined type multi-specification geotechnical sample preparation device comprises at least two vertical rods, wherein top plates capable of moving up and down along the vertical rods are arranged on the vertical rods, and through holes are formed in the middle of the top plates; a pressurizing device is arranged right below the top plate and is connected with an oil pump, and the oil pump can pressurize and lift the pressurizing device.
The combined sleeve is formed by sleeving a sleeve with a large inner diameter in a sleeve with a small inner diameter in a sleeved mode, or the combined sleeve is formed by connecting sleeves with the same inner diameter up and down, or the combined sleeve is formed by nesting a cutting ring with the same inner diameter in the sleeve.
During sample preparation, the combined sleeve is positioned on the pressurizing device, and the lower part of the pressure rod is positioned in the combined sleeve.
When demoulding, the pressure lever is positioned on the pressurizing device, and the upper part of the pressure lever is positioned in the combined sleeve.
Furthermore, the invention is characterized in that:
the sleeve comprises a first sleeve with an inner diameter of 39.1mm, a wall thickness of 4mm and a height of 120 mm; a second sleeve with an inner diameter of 61.8mm, a wall thickness of 6mm and a height of 50 mm; a third sleeve with an inner diameter of 61.8mm, a wall thickness of 6mm and a height of 120 mm; a fourth sleeve with an inner diameter of 79.8mm, a wall thickness of 6mm and a height of 40 mm; a fifth sleeve with an inner diameter of 101mm, a wall thickness of 9mm and a height of 100 mm; the sixth sleeve is 101mm in inner diameter, 9mm in wall thickness and 170mm in height;
the cutting ring comprises a first cutting ring with the inner diameter of 61.8mm, the wall thickness of 2mm and the height of 20 mm; a second cutting ring with an inner diameter of 79.8mm, a wall thickness of 2mm and a height of 20mm.
The combined sleeve is formed by sleeving a first sleeve in a third sleeve;
or the combined sleeve is formed by connecting the second sleeve and the third sleeve up and down and then sleeving the second sleeve and the third sleeve in the sixth sleeve;
or the combined sleeve is formed by connecting a fifth sleeve and a sixth sleeve up and down;
or the combined sleeve is formed by nesting a first cutting ring in a second sleeve;
or the combined sleeve is formed by nesting a second cutting ring in a fourth sleeve.
The large inner diameter sleeve and the small inner diameter sleeve are connected through a sleeve reinforcing buckle.
The sleeves with the same inner diameter are connected up and down through the snap ring.
One end of the pressure rod inserted into the combined sleeve is connected with a pressing block, the diameter of the pressing block is the same as that of the soil sample, and a clamp used for fixing the position of the pressure rod is arranged between the pressure rod and the pressing block.
The pressing block comprises a first pressing block with the diameter of 61mm and the height of 20 mm; a second pressing block with the diameter of 79mm and the height of 20 mm; a third compact with a diameter of 101mm and a height of 20mm.
Still including the drawing of patterns steel sheet, the roof bottom is equipped with the draw-in groove that is used for blocking the drawing of patterns steel sheet, and it has the drawing of patterns hole to open on the drawing of patterns steel sheet.
The mould taking holes comprise a first mould taking hole with the diameter of 79.8mm, a second mould taking hole with the diameter of 61.8mm and a third mould taking hole with the diameter of 39.1 mm; the diameter of the through hole is 101mm.
The side of the pressure lever is provided with scales.
The limiting device comprises a limiting rod, a laser receiver, a laser transmitter and a control converter for controlling the pressurization and the decompression of the pressurization device, and the limiting rod is fixed on the compression bar and can move up and down along the compression bar; the laser emitter and the laser receiver are respectively arranged at two ends of the limiting rod, the laser receiver is connected with the control converter, and the control converter is connected with the pressurizing device. During sample preparation, laser emitted by the laser emitter is received by the receiver to form a closed loop, when the laser is cut off by the combined sleeve, the laser receiver cannot receive the laser, and the converter is controlled to convert a signal to enable the pressurizing device to stop pressurizing.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the combined type multi-specification geotechnical sample preparation device provided by the invention, during sample preparation, the combined type sleeve is pressurized and lifted through the pressurizing device, so that the sample in the combined type sleeve is compacted by the pressure rod. And when demoulding, the pressure device is used for pressurizing and lifting the pressure rod, so that the pressure rod can demould the sample in the combined sleeve. Simultaneously, through setting up combination formula sleeve, cup joint little internal diameter sleeve in the big internal diameter sleeve, perhaps connect the sleeve that the internal diameter is the same from top to bottom, perhaps nestification is in the sleeve with the cutting ring that the sleeve internal diameter is the same, can make the appearance by the rapid Assembly, can make the cutting ring sample, can make the triaxial sample again, can also carry out the drawing of patterns to the sample. The sample preparation efficiency can be improved, the sample preparation and demolding process can be finished at high quality, and materials can be saved.
Furthermore, the invention adopts the oil pump to be connected with the high-precision oil pressure gauge, and can accurately control the pressure in the sample preparation and demoulding processes.
Furthermore, by adopting six sleeves with different specifications and two cutting rings with different specifications, three-axis samples or cutting ring samples with different specifications can be prepared.
Furthermore, according to soil body samples with different specifications, a demoulding steel plate with a plurality of mould taking holes is designed, so that the soil body samples can be taken out conveniently.
Furthermore, scales are arranged on the side part of the pressure rod. In the sample preparation process, the height of the compacted sample can be determined by observing the difference of the scales of the pressure lever.
Furthermore, the limiting device is sleeved on the compression rod, the distance between the limiting device and the combined sleeve is the height of the compaction sample at this time initially, the laser receiver automatically senses whether the height of the compaction sample at this time is reached, and when the height of the compaction sample at this time is reached, the pressurizing device stops working without manually observing the difference value of the scales of the compression rod.
Drawings
Fig. 1 is a schematic structural diagram of a combined multi-specification geotechnical sample preparation device provided by the invention;
FIG. 2 is a schematic structural view of a reaction frame according to the present invention;
FIG. 3 is a schematic top view of a steel stripper plate according to the present invention;
FIG. 4 (a) is a schematic view showing the operation of producing a sample having a diameter of 39.1mm in accordance with the present invention; FIG. 4 (b) is a schematic drawing of a phi 39.1mm sample of the present invention when demolded;
FIG. 5 (a) is a schematic view showing the fabrication of a specimen having a diameter of 61.8mm according to the present invention; FIG. 5 (b) is a schematic drawing showing a phi 61.8mm sample of the present invention being demolded;
FIG. 6 (a) is a schematic view of the present invention when a sample having a diameter of 101mm is produced; FIG. 6 (b) is a schematic drawing of a phi 101mm sample of the present invention being demolded;
FIG. 7 (a) is a schematic view showing the fabrication of a 61.8mm diameter cutting ring sample according to the present invention; FIG. 7 (b) is a schematic diagram of the present invention when the cut ring sample with a diameter of 61.8mm is demolded;
FIG. 8 (a) is a schematic diagram of the present invention when a ring cutter sample having a diameter of 79.8mm is manufactured; FIG. 8 (b) is a schematic drawing showing a test piece of a Phi 79.8mm cutting ring of the present invention being demolded;
FIG. 9 is a schematic view of a sleeve reinforcing clip according to the present invention;
fig. 10 is a schematic structural view of the limiting device provided by the present invention.
Wherein: 1. a reaction frame; 11. a base; 12. a vertical rod; 13. a top plate; 14 a nut; 2. a pressurizing device; 21. an oil pump; 22. a high-precision oil pressure gauge; 3. a combined sleeve; 31. a first sleeve; 32. a second sleeve; 33. a third sleeve; 34. a fourth sleeve; 35. a fifth sleeve; 36. a sixth sleeve; 4. a pressure lever; 5. demoulding the steel plate; 51. a first die taking hole; 52. a second die taking hole; 53. a third mold taking hole; 6. a sample; 71. a first pressing block; 72. a second pressing block; 73. a third pressing block; 81. the sleeve is provided with a reinforcing buckle; 84 is a clip; 91. a first cutting ring; 92. a second cutting ring; 10. a limiting device; 101. a limiting rod; 102. a laser receiver; 103. a laser transmitter; 104. the converter is controlled.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the invention provides a combined type multi-specification geotechnical sample preparation device which comprises at least two vertical rods 12, wherein top plates 13 capable of moving up and down along the vertical rods 12 are arranged on the vertical rods 12, and through holes are formed in the middle parts of the top plates 13; a pressurizing device 2 is arranged right below the top plate 13, the pressurizing device 2 is connected with an oil pump 21, and the oil pump 21 can pressurize and lift the pressurizing device 2; the combined sleeve 3 is formed by sleeving a sleeve with a small inner diameter in a sleeve with a large inner diameter, or the combined sleeve 3 is formed by connecting sleeves with the same inner diameter up and down, or the combined sleeve 3 is formed by nesting a cutting ring with the same inner diameter as the sleeve in the sleeve; during sample preparation, the combined sleeve 3 is positioned on the pressurizing device 2, and the lower part of the pressure rod 4 is positioned in the combined sleeve 3; when demoulding, the pressure lever 4 is positioned on the pressurizing device 2, and the upper part of the pressure lever 4 is positioned in the combined sleeve 3.
Preferably, a limiting device 10 is arranged at the upper part of the pressure rod 4 during sample preparation.
According to the invention, the combined sleeve 3 is arranged, so that the combined type ring cutter sample preparation device can be quickly combined for sample preparation, namely, a ring cutter sample can be prepared, a triaxial sample can be prepared, and the sample can be demoulded. The sample preparation efficiency can be improved, the sample preparation and demolding processes can be finished at high quality, and materials can be saved.
As shown in fig. 1 and 2, the present invention comprises a reaction frame 1, a pressurizing device 2, a combined sleeve 3 and a demoulding steel plate 5. The reaction frame 1 is composed of a lower steel base 11, an upper steel top plate 13, two long vertical rods 12 and nuts 14. The vertical rod 12 is provided with threads, the top plate 13 is connected with the base 11 through the long vertical rod 12 and the nut 14, and the distance between the top plate 13 and the pressurizing device 2 is controlled through adjusting the nut 14. The base 11 is made of I-steel with the length of 500mm and the width of 300mm, and the thickness of an I-steel web plate is 20mm. The top plate 13 is made of a steel plate with the length of 500mm, the width of 300mm and the thickness of 20mm, a through hole is formed in the middle of the top plate 13, the diameter of the hole is 101mm, and the steel plate is used for demoulding of a sample. 2 steel clamping grooves are arranged on two sides of the bottom of the hole of the top plate 13, the clear distance of the steel groove is 210mm, and the demoulding steel plate 5 moves on the clamping grooves to control the diameter of the mould taking hole so as to demould.
The pressurizing device 2 comprises a hydraulic jack, an oil pump 21 and a high-precision oil pressure gauge 22.
The combined sleeve 3 is made of stainless steel and comprises 6 sleeves and 2 cutting rings, and the specific specifications are as follows: 1 first sleeve 31 with an inner diameter of 39.1mm, a wall thickness of 4mm and a height of 120 mm; 1 second sleeve 32 with an internal diameter of 61.8mm, a wall thickness of 6mm and a height of 50 mm; 1 third sleeve 33 with an inner diameter of 61.8mm, a wall thickness of 6mm and a height of 120 mm; a fourth sleeve 34 of internal diameter 79.8mm, wall thickness 6mm and height 40 mm; a fifth sleeve 35 having an inner diameter of 101mm, a wall thickness of 9mm and a height of 100 mm; a sixth sleeve 36 having an internal diameter of 101mm, a wall thickness of 9mm and a height of 170 mm; a first ring cutter 91 with an inner diameter of 61.8mm, a wall thickness of 2mm and a height of 20 mm; a second ring cutter 92 with an internal diameter of 79.8mm, a wall thickness of 2mm and a height of 20mm.
It should be noted that, the inner side of the upper part of the second sleeve 32 is downward from the top of the cylinder within a height range of 20mm, the inner diameter is 4mm larger than the diameter of the lower part, and a first cutting ring 91 with a height of 20mm, an inner diameter of 61.8mm and a wall thickness of 2mm is placed.
Within the height range of 20mm upward from the bottom surface of the fourth sleeve 34, an inner diameter 4mm larger than the diameter of the upper portion, a second ring cutter 92 having an inner diameter of 79.8mm, a height of 20mm and a wall thickness of 2mm was placed.
The snap ring includes a first snap ring and a second snap ring. The depth of the middle part of the upper annular section of the third sleeve 33 and the lower annular section of the second sleeve 32 is 10mm, the width of the middle part is 2mm, the annular groove is 20mm in height, 66mm in inner diameter, 70mm in outer diameter and 2mm in wall thickness, and is used for connecting the second sleeve 32 and the third sleeve 33.
The depth of the middle part of the upper annular cross section of the fifth sleeve 35 and the lower annular cross section of the sixth sleeve 36 is 10mm, the width of the middle part is 4mm, and a second snap ring with the height of 20mm, the inner diameter of 107mm, the outer diameter of 115mm and the wall thickness of 4mm is arranged on the groove and used for connecting the fifth sleeve 35 and the sixth sleeve 36.
Telescopic accessory includes briquetting, 4 sleeve reinforcement buckles 81 and 1 depression bar 4, and specific specification is as follows: 1 first pressing block 71 with the diameter of 61mm and the height of 20mm is manufactured; manufacturing 1 second pressing block 72 with the diameter of 79mm and the height of 20 mm; 1 third compact 73 having a diameter of 101mm and a height of 20mm was made. The range of phi 39mm on the middle part of the upper surface of the pressing block is sunken by 2mm downwards, and two clamping clips 84 with the height of 20mm are arranged on two sunken sides of the pressing block and used for determining the position of the pressing rod 4, so that the pressing rod 4 is fixed and the pressing rod 4 and the pressing block keep consistent movement. The sleeve reinforcing snap 81 is used to connect two sleeves of different diameters, improving the side wall bearing capacity of the inner sleeve. The diameter of the pressure lever 4 is 39mm, the height is 251mm, and the limiting device 10 is installed on the pressure lever 4, can be detached and can move on the pressure lever 4.
As shown in fig. 3, 1 demoulding steel plate 5 with the thickness of 20mm, the length of 522mm and the width of 200mm is manufactured, a first mould taking hole 51 with the radius of 40mm is arranged at the upper and lower central points 120mm away from the left edge of the demoulding steel plate 5, a mark is made at the position 150mm away from the left side of the steel plate horizontally, and when the steel plate moves to the position, the phi 79.8mm ring cutter sample demoulding can be carried out; a second mould taking hole 52 with the radius of 31mm is arranged at a position 151mm away from the center of the round hole, when the first mould taking hole 51 is completely moved away, the round hole of the second mould taking hole 52 is just in the middle, and phi 61.8mm ring cutter and phi 61.8mm triaxial sample demoulding are carried out; a third mold drawing hole 53 with a radius of 20mm is opened at the upper and lower center points 100mm from the right edge of the steel plate, and when the second mold drawing hole 52 is completely moved past, the third mold drawing hole 53 is just in the middle, and the phi 39.1mm three-axis sample demolding is carried out.
The invention sets scales on the side of the pressure lever 4. In the sample preparation process, the height of the compacted sample is determined according to the difference of the scales of the pressure rod 4, the difference of the scales on the pressure rod 4 can be preset by an operator during sample preparation, when the difference reaches a preset value, the pressurizing device 2 stops pressurizing, and after the pressure relief of the pressurizing device 2 is completed, the pressure rod 4 is taken out for soil material addition. And finishing the sample preparation work in several times according to the standard requirement.
Because the scale difference of the pressure lever 4 is observed manually and is troublesome, the invention is provided with the limiting device 10, the limiting device 10 comprises a limiting rod 101, a receiver 102, a laser transmitter 103 and a control converter 104, and the limiting rod 101 is fixed on the pressure lever and can move up and down along the pressure lever; the laser transmitter 103 and the laser receiver 102 are respectively arranged at two ends of the limiting rod 101, and the control converter 104 is arranged at the upper part of the laser receiver 102. During sample preparation, an operator presets a difference value of the scales on the pressure rod 4 during sample preparation, the limiting rod 101 is sleeved on the pressure rod 4, and the distance between the limiting rod 101 and the upper end face of the combined sleeve 3 is the difference value of the preset scales. Along with the sample preparation, the distance between the limiting rod 101 and the upper end face of the combined sleeve 3 is smaller and smaller, when the vertical distance between the limiting device 10 and the combined sleeve 3 is minimum, laser is cut off by the sleeve, the laser receiver 102 cannot receive the laser, and at the moment, the control converter 104 converts a signal to enable the pressurizing device 2 to stop pressurizing. And after the pressure relief of the pressurizing device 2 is finished, taking out the pressure lever 4 to add the soil. And finishing the sample preparation work in several times according to the standard requirement.
The concrete process for preparing the column-shaped soil body sample and the cutting ring soil body sample by using various combined sleeves comprises the following steps:
firstly, the reaction frame 1 is fixed on the ground, the pressurizing device 2 is fixed in the middle of the base 11, the combined sleeve 3 is placed on the pressurizing device 2, the position of the top plate 13 away from the combined sleeve 3 is controlled by the adjusting nut 14, the pressurizing device 2 is used for sample pressing by adjusting pressure through the oil pump 21, and the magnitude of the pressure is displayed through the high-precision oil pressure gauge 22. The demoulding steel plate 5 is placed on the steel clamping groove at the bottom side of the top plate 13, and the triaxial sample is demoulded through the demoulding steel plate 5. The following is a specific operation flow for preparing different soil samples:
as shown in fig. 4 (a), for the manufacture of a triaxial sample with a diameter of 39.1mm, the height of the sample is 2 to 2.5 times of the diameter according to the specification, and the height of the sample in the first sleeve 31 is adjusted by the pressure rod with scales 4 with the diameter of 39mm and the height of 251mm, so that the device can meet both standard sample preparation and non-standard sample preparation. Before the experiment, the reaction frame 1 and the pressurizing device 2 are fixed, and the through hole of the top plate 13 is closed by the demoulding steel plate 5. The first sleeve 31 is placed in the third sleeve 33 and connected through the corresponding sleeve reinforcing buckle 81, so that the pressure bearing capacity of the first sleeve 31 is improved. The soil is placed in the first sleeve 31, and the bottom of the first sleeve 31 is provided with a pressurizing device. The height of the soil filling amount is about 1/3 of the height of the sample each time, a compression bar 4 with the diameter of 39mm is placed on the upper part of the soil, and a limiting device 10 is installed on the compression bar 4 at the moment. The pressurizing device 2 is continuously pressurized to enable the combined sleeve 3 to ascend to be in contact with the top plate 13, the height of a compacted sample is determined according to the difference of scales of the pressure rod 4, after the receiver 102 of the limiting device 10 cannot receive a signal, the converter 104 is controlled to convert the signal to enable the pressurizing device 2 to stop pressurizing, and after the pressure relief of the pressurizing device 2 is completed, the pressure rod 4 is taken out to add soil. And finishing the phi 39.1mm triaxial sample preparation work for 3 to 4 times according to the specification requirement.
As shown in fig. 4 (b), for the phi 39.1mm triaxial sample demoulding, a pressure lever 4 is placed on a pressure device 2, a combined sleeve 3 with a sample is placed on the upper part of the pressure lever 4, a demoulding steel plate 5 is adjusted by a steel groove on the bottom surface of a top plate 13, so that a third mould taking hole of phi 39.1mm of the demoulding steel plate 5 is superposed with the central axis of the demoulded phi 39.1mm triaxial sample, and the phi 39.1mm triaxial sample demoulding is carried out by pressurizing.
As shown in fig. 5 (a), for the manufacture of a triaxial sample with a diameter of 61.8mm, the height of the sample is 2-2.5 times of the diameter according to the specification, the second sleeve 32 and the third sleeve 33 are connected by the first snap ring to form an upper sleeve and a lower sleeve with an inner diameter of 61.8mm, a height of 170mm and a wall thickness of 6mm, and the upper sleeve and the lower sleeve are placed in the sixth sleeve 36 to form the combined sleeve 3. The height of the sample in the combined sleeve 3 is adjusted by the pressure rod 4, and the device can meet both standard sample preparation and non-standard sample preparation. Before the experiment is started, the reaction frame 1 and the pressurizing device 2 are fixed, and the through hole of the top plate 13 is sealed by the demoulding steel plate 5. The combined sleeve 3 is placed on the pressurizing device 2, soil is placed in the combined sleeve 3, and the pressurizing device is arranged at the bottom of the combined sleeve 3. The height of each soil filling amount is about 1/4 of the height of the sample, a first pressing block 71 with the diameter of 61mm is placed on the upper portion of the soil, the upper portion of the first pressing block 71 is a pressing rod 4, and the limiting device 10 is installed on the pressing rod 4 at the moment. The combined sleeve 3 is lifted up by continuously pressurizing the pressurizing device 2, when the laser receiver 102 cannot receive laser, the converter 104 is controlled to convert a signal to stop pressurizing the pressurizing device 2, and the first pressing block 71 and the pressing rod 4 are taken out after the pressurizing device 2 finishes pressure relief to add soil. And finishing the phi 61.8mm triaxial sample preparation work for 3 to 4 times according to the specification requirement.
As shown in fig. 5 (b), for the phi 61.8mm triaxial sample demoulding, a pressure bar 4 is placed on a pressurizing device 2, a first pressing block 71 with phi 61mm is arranged on the upper portion of the pressure bar 4, a combined sleeve 3 with the sample is arranged on the upper portion of the first pressing block 71, and a demoulding steel plate 5 is adjusted in position through a clamping groove in the bottom surface of an upper steel plate, so that a second mould taking hole of the demoulding steel plate 5 is overlapped with the central axis of the phi 61.8mm triaxial sample to be demoulded, and the phi 61.8mm triaxial sample demoulding is carried out by pressurizing.
Referring to fig. 6 (a), for the manufacture of a triaxial sample with a diameter of 101mm, the height of the sample is 2-2.5 times of the diameter according to the specification, and the fifth sleeve 35 and the sixth sleeve 36 are connected by a second snap ring to form a combined sleeve with an inner diameter of 101mm, a wall thickness of 9mm and a height of 270 mm. The height of the sample in the combined sleeve 3 is adjusted by the pressure rod 4, so that the device can meet both standard sample preparation and non-standard sample preparation. Before the experiment is started, the reaction frame 1 and the pressurizing device 2 are fixed, and at the moment, the through hole of the top plate 13 is not sealed. The combined sleeve 3 is placed on the pressurizing device 2, the soil material is placed in the combined sleeve 3, the height of the soil filling amount each time is about 1/5 of the height of the sample, the third pressing block 73 with the diameter of 100mm and the pressing rod 4 are placed on the upper portion of the soil material, and the pressurizing system is continuously pressurized to enable the combined sleeve to ascend. When the laser receiver 102 does not receive the laser, the control converter 104 converts the signal to stop the pressurization of the pressurization device 2, and after the pressure relief of the pressurization device 2 is completed, the third pressing block 73 and the pressing rod 4 are taken out to add the soil. And completing phi 101mm triaxial sample preparation work for 4 to 5 times according to the specification requirement.
As shown in fig. 6 (b), for the phi 101mm triaxial sample demoulding, a pressure bar 4 is placed on a pressurizing device 2, a third pressing block 73 with phi 100mm is arranged on the upper portion of the pressure bar 4, a combined sleeve 3 with the sample is arranged on the upper portion of the third pressing block 73, a top plate 13 is in contact with the top of the sleeve by an adjusting nut 14, the central line of the demoulded phi 101mm triaxial sample is overlapped with the central line of the hole position of the top plate 13, and the phi 101mm triaxial sample demoulding is carried out by pressurizing.
As shown in FIG. 7 (a), in the case of a cutting ring sample having a diameter of 61.8mm, the height of the sample was 20mm according to the specifications, and after the reaction frame 1 and the pressing device 2 were fixed, the through hole of the top plate 13 was closed with the knock-out steel plate 5. The height inside the second sleeve 32 is adjusted by the pressing rod 4. At the bottom of the combined sleeve 3 is a pressurizing device 2. Before the experiment is started, the first cutting ring 91 is placed in the annular groove at the bottom of the second sleeve 32, and soil is placed in the cutting ring. A first pressing block 71 with the diameter of 61mm is placed on the upper part of the soil material, and a pressing rod 4 is arranged on the upper part of the first pressing block 71. The second sleeve 32 is lifted to be in contact with the top plate 13 through continuous pressurization of the pressurizing device 2, when the requirements are met, pressure relief is carried out on the pressurizing device 2, the first pressing block 71 and the pressing rod 4 are taken out, and the sample preparation of the phi 61.8mm cutting ring sample is completed for 3 to 4 times according to the standard requirements.
As shown in fig. 7 (b), for demolding of a phi 61.8mm cutting ring sample, a pressure rod 4 is placed on a pressurizing device 2, a first pressing block 71 with phi 61mm is arranged on the upper portion of the pressure rod 4, a second sleeve 32 with the sample is arranged on the upper portion of the first pressing block 71, and a demolding steel plate 5 is adjusted in position through a clamping groove in the bottom surface of an upper steel plate, so that a phi 61.8mm hole position of the demolding steel plate 5 is overlapped with a central axis of the demolded phi 61.8mm cutting ring sample, and the phi 61.8mm cutting ring sample is demolded through pressurization.
As shown in FIG. 8 (a), in the case of a cutting ring sample having a diameter of 79.8mm, the height of the sample was 20mm according to the specifications, and after the reaction frame 1 and the pressing device 2 were fixed, the through-hole of the top plate 13 was closed with the knock-out plate 5. The height of the interior of the fourth sleeve 34 is adjusted by means of the pressure lever 4. At the bottom of the fourth sleeve 34 is the pressurizing means 2. Before the experiment is started, the second cutting ring 92 is placed in the annular groove at the bottom of the fourth sleeve 34, and soil is placed in the second cutting ring 92. The second pressing block 72 with the diameter of 79mm is placed on the upper part of the soil material, and the pressing rod 4 is arranged on the upper part of the second pressing block 72. Continuously pressurizing through the pressurizing device 2 to enable the fourth sleeve 34 to ascend to be in contact with the top plate 13, when the requirement is met, releasing the pressure of the pressurizing device 2, taking out the second pressing block 72 and the pressing rod 4, and finishing sample preparation of a phi 79.8mm cutting ring sample for 3 to 4 times according to the standard requirement.
As shown in fig. 8 (b), for demolding of a phi 79.8mm cutting ring sample, a pressure rod 4 is placed on a pressurizing device 2, a second pressing block 72 with the phi 79mm is arranged at the upper part of the pressure rod 4, a fourth sleeve 34 with the sample is placed on the second pressing block 72, the position of a demolding steel plate 5 is adjusted through a clamping groove in the bottom surface of an upper steel plate, the phi 79.8mm hole position of the demolding steel plate 5 is enabled to be overlapped with the central axis of the demolded phi 79.8mm cutting ring sample, and the phi 79.8mm cutting ring sample is demolded through pressurization.
When the soil sample is made, the high-precision oil pressure gauge 22 displays the pressure during loading, so that the invention can control the pressure according to the requirement and realize the precise control of the pressure.
Claims (8)
1. The combined type multi-specification geotechnical sample preparation device is characterized by comprising at least two vertical rods (12), wherein top plates (13) capable of moving up and down along the vertical rods (12) are arranged on the vertical rods (12), and through holes are formed in the middle of the top plates (13); a pressurizing device (2) is arranged right below the top plate (13), the pressurizing device (2) is connected with an oil pump (21), and the oil pump (21) can pressurize and lift the pressurizing device (2);
the combined sleeve (3) is formed by sleeving a sleeve with a large inner diameter in a sleeve with a small inner diameter in a sleeved mode, or the combined sleeve (3) is formed by connecting sleeves with the same inner diameter up and down, or the combined sleeve (3) is formed by nesting ring cutters with the same inner diameter in the sleeves; the large inner diameter sleeve and the small inner diameter sleeve are connected through a sleeve reinforcing buckle (81);
during sample preparation, the combined sleeve (3) is positioned on the pressurizing device (2), and the lower part of the pressure lever (4) is positioned in the combined sleeve (3);
when demoulding, the pressure lever (4) is positioned on the pressurizing device (2), and the upper part of the pressure lever (4) is positioned in the combined sleeve (3);
the sleeve comprises a first sleeve (31) having an inner diameter of 39.1mm, a wall thickness of 4mm and a height of 120 mm; a second sleeve (32) having an internal diameter of 61.8mm, a wall thickness of 6mm and a height of 50 mm; a third sleeve (33) having an inner diameter of 61.8mm, a wall thickness of 6mm and a height of 120 mm; a fourth sleeve (34) having an inner diameter of 79.8mm, a wall thickness of 6mm and a height of 40 mm; a fifth sleeve (35) having an inner diameter of 101mm, a wall thickness of 9mm and a height of 100 mm; a sixth sleeve (36) having an inner diameter of 101mm, a wall thickness of 9mm and a height of 170 mm;
the cutting ring comprises a first cutting ring (91) with the inner diameter of 61.8mm, the wall thickness of 2mm and the height of 20 mm; a second cutting ring (92) with an inner diameter of 79.8mm, a wall thickness of 2mm and a height of 20mm.
2. The combined multi-specification geotechnical sample preparation device according to claim 1, wherein the combined sleeve (3) is composed of a third sleeve (33) which is internally sleeved with the first sleeve (31);
or the combined sleeve (3) is formed by connecting the second sleeve (32) and the third sleeve (33) up and down and then sleeving the second sleeve and the third sleeve in the sixth sleeve (36);
or the combined sleeve (3) is formed by connecting a fifth sleeve (35) and a sixth sleeve (36) up and down;
or the combined sleeve (3) is formed by nesting a first cutting ring (91) in a second sleeve (32);
or the combined sleeve (3) is formed by nesting a second cutting ring (92) in a fourth sleeve (34).
3. The modular multi-format earth test specimen preparation apparatus according to claim 1, wherein the sleeves of the same inner diameter are connected one above the other by a snap ring.
4. The combined type multi-specification soil test sample preparation device according to claim 1, wherein one end of the compression bar (4) inserted into the combined sleeve is connected with a pressing block, the diameter of the pressing block is the same as that of the soil test sample, and a clamp (84) for fixing the position of the compression bar is arranged between the compression bar (4) and the pressing block.
5. The combined multi-specification geotechnical sample preparation device according to claim 1, further comprising a demoulding steel plate (5), wherein a clamping groove for clamping the demoulding steel plate (5) is formed at the bottom of the top plate (13), and a mould taking hole is formed in the demoulding steel plate (5).
6. The modular multi-gauge soil test sample preparation device according to claim 5, wherein the sampling holes comprise a first sampling hole (51) having a diameter of 79.8mm, a second sampling hole (52) having a diameter of 61.8mm, and a third sampling hole (53) having a diameter of 39.1 mm; the diameter of the through hole is 101mm.
7. The combined multi-specification soil test sample preparation device according to claim 1, wherein the side of the pressure rod (4) is provided with a scale.
8. The combined multi-specification geotechnical sample preparation device according to claim 1, further comprising a limiting device (10), wherein the limiting device (10) comprises a limiting rod (101), a laser receiver (102), a laser emitter (103) and a control converter (104) for controlling pressurization and decompression of the pressurization device (2), and the limiting rod (101) is fixed on the compression rod (4) and can move up and down along the compression rod (4); the laser transmitter (103) and the laser receiver (102) are respectively arranged at two ends of the limiting rod (101), the laser receiver (102) is connected with the control converter (104), and the control converter (104) is connected with the pressurizing device (2).
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| CN112414811B (en) * | 2020-11-04 | 2023-02-03 | 宁夏大学 | Three-axis and cutting ring mold and molding method thereof |
| CN113125221B (en) * | 2021-04-08 | 2022-10-28 | 昆明理工大学 | Triaxial test sample preparation device and sample preparation method thereof |
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