CN114062082A - Original state soil triaxial sample rotary-drop preparation device and method - Google Patents
Original state soil triaxial sample rotary-drop preparation device and method Download PDFInfo
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- CN114062082A CN114062082A CN202111363767.7A CN202111363767A CN114062082A CN 114062082 A CN114062082 A CN 114062082A CN 202111363767 A CN202111363767 A CN 202111363767A CN 114062082 A CN114062082 A CN 114062082A
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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
- G01N2001/2873—Cutting or cleaving
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Abstract
The invention discloses a rotational-reduction preparation device and method for an undisturbed soil triaxial sample, which comprises a bearing mechanism, a cutting mechanism and a supporting mechanism, wherein the bearing mechanism is arranged on the supporting mechanism; the bearing mechanism comprises a base, and a leveling component is arranged on the base; the top end of the base is provided with a clamping device; the cutting mechanism comprises a power assembly, the bottom end of the power assembly is detachably connected with a cutter head assembly, and the cutter head assembly is used for cutting undisturbed soil; the supporting mechanism comprises a supporting rod group which is connected with the cutting mechanism in a sliding mode, a lifting power assembly is arranged at the bottom end of the supporting rod group, and the lifting power assembly is fixedly installed at the top end of the base. The invention has simple structure, simple operation method and small influence on undisturbed soil in the cutting process, avoids the influence of uncertain factors and human factors in the cutting process, perfects the soil borrowing method of undisturbed soil and improves the accuracy of test data.
Description
Technical Field
The invention relates to the field of geotechnical engineering, in particular to a rotational-reduction preparation device and method for an undisturbed soil triaxial sample.
Background
The design and construction of geotechnical engineering need be decided according to the geological conditions of the engineering site, so the construction site needs to be surveyed before the design and construction, the mechanical property and stability of the original soil on site are determined, the triaxial sample of the original soil is needed for the measurement of the mechanical property of the original soil, and the shear strength of the original soil under different stress paths and drainage conditions can be measured by the triaxial compression test of the original soil sample. When the undisturbed soil is subjected to a triaxial mechanical test, an undisturbed soil body sample obtained on site needs to be made into a standard sample; in order to reduce the disturbance of the undisturbed soil sample from the sample preparation process, suitable sample preparation equipment, commonly referred to as a soil cutter or a sample preparation device, must be used.
At present, a sample preparation device in a laboratory generally adopts a cutting method of soil sample rotation and cutter static, the principle refers to a machine tool, and the method easily leads the obtained soil sample to be scattered and broken due to the high-speed rotation of the soil sample in the cutting process, so that the test data has larger deviation from the actual condition; even if a small amount of sample preparation devices with static soil samples and rotating cutters exist, the cutting cutters are fixed, the soil samples are easy to crack due to large feeding amount in one-time direct cutting, the cutters cannot be adjusted due to the fact that the cutters are fixed, the cutters need to be replaced frequently, and the cutting efficiency is low. Therefore, a rotational-descending preparation device for a triaxial sample of undisturbed soil is needed to be capable of conveniently cutting for many times.
Disclosure of Invention
The invention aims to provide a device and a method for preparing an undisturbed soil triaxial sample by rotary reduction, which aim to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a rotational-reduction preparation device for a triaxial sample of undisturbed soil, which comprises
The bearing mechanism is used for installing undisturbed soil blanks and comprises a base, and a leveling component is arranged on the base; the top end of the base is provided with a clamping device;
the cutting mechanism is arranged above the inside of the bearing mechanism and used for cutting the undisturbed soil blank arranged at the top end of the clamping device; the cutting mechanism comprises a cutting power assembly, the bottom end of the cutting power assembly is detachably connected with a cutter head assembly, and the cutter head assembly is used for cutting the undisturbed soil blank;
the supporting mechanism is arranged between the bearing mechanism and the cutting mechanism and is used for supporting the cutting mechanism and driving the cutting mechanism to move up and down; the supporting mechanism comprises a supporting rod group which is connected with the cutting mechanism in a sliding mode, a lifting power assembly is arranged at the bottom end of the supporting rod group, and the lifting power assembly is fixedly installed at the top end of the base.
Preferably, the base comprises a bottom plate, a top plate is fixedly connected to the top end of the bottom plate, a mounting groove is formed in the center of the top plate, and the clamping device is arranged in the mounting groove.
Preferably, the leveling component comprises a plurality of leveling struts and a leveling device, the plurality of leveling struts are circumferentially and vertically fixed on the top surface of the base at equal intervals, and the top surfaces of the leveling struts are fixedly connected with the bottom surface of the top plate; the leveling device is arranged at the top end of the clamping device.
Preferably, the clamping device comprises a supporting mechanism arranged in the mounting groove and a clamping component fixedly mounted on the top surface of the top plate; the bearing mechanism comprises a bearing push rod fixedly installed at the bottom end of the installation groove, a bearing plate is fixedly connected to the output end of the bearing push rod, the bearing plate is matched with the installation groove, and the leveling device is arranged at the top end of the bearing plate; the clamping device and the mounting groove are arranged concentrically.
Preferably, the clamping assembly comprises a fixing ring fixedly connected to the top surface of the top plate, and an adjusting ring is rotatably connected to the outside of the fixing ring; a plurality of arc walls have been seted up to the inner chamber of adjustable ring, sliding connection has the one end of supporting rod in the arc wall, the other end of supporting rod stretches out fixed ring's lateral wall and with fixed ring sliding connection.
Preferably, the cutting power assembly comprises a power frame in sliding connection with the support rod group, a cutting motor is fixedly mounted at the top end of the power frame, and the output end of the cutting motor extends into the inner cavity of the power frame and is connected with a cutting ring in a meshing manner; the cutting ring with the power frame rotates to be connected, the bottom of cutting ring can be dismantled and be connected with the blade disc subassembly.
Preferably, the cutter head assembly comprises a body ring detachably connected with the cutting ring, a cutting gear is rotatably connected in a cavity of the ring body of the body ring, a plurality of cutting tool holders are engaged and connected with the top surface of the cutting gear at equal intervals in the circumferential direction, and the cutting tool holders are slidably connected with the side wall of the body ring; the cutting knife rest is fixedly connected with a cutting knife towards the tail end of the inner circle direction of the body ring.
A rotational-reduction preparation method of a triaxial sample of undisturbed soil comprises the following steps:
sampling the undisturbed soil blank and checking the internal liquidity of the undisturbed soil blank;
leveling and supporting mechanism;
clamping an undisturbed soil blank;
erecting a cutting mechanism and adjusting the cutter head assembly;
cutting an undisturbed soil blank;
and cleaning the cuttings to obtain an undisturbed soil triaxial sample.
Preferably, in the step of cutting the undisturbed soil blank, the cutting needs to be performed for a plurality of times, each time of cutting is performed from the top end to the bottom end of the undisturbed soil blank, then the cutting mechanism is lifted, and the cutter disc assembly is adjusted again for cutting.
Preferably, in the step of cutting the raw soil material, the cutting is stopped and the chips are cleaned once every time the raw soil material is cut to 1/3-1/2 of the height.
The invention discloses the following technical effects: the invention discloses a rotational-reduction preparation device and method for an undisturbed soil triaxial sample.A base and a clamping device are leveled by a leveling assembly, so that the undisturbed soil triaxial sample obtained by cutting an undisturbed soil blank has high verticality and can not be inclined by drooling, the test effect of the undisturbed soil triaxial sample is good, and the accuracy of the test result is high; the cutting mechanism drives the cutter head assembly to rotate through the power assembly, and cuts the undisturbed soil blank fixed on the bearing mechanism, the undisturbed soil blank is fixed, and the cutter rotates, so that the influence of the cutting process on the undisturbed soil blank is reduced, and the test error of the obtained undisturbed soil triaxial sample is reduced; the cutter head assembly is convenient to adjust the cutting amount of the cutter, convenient and fast, the cutter does not need to be detached and replaced, and the cutting efficiency is high. The invention has simple structure and concise operation method, has small influence on the undisturbed soil blank in the cutting process, avoids the influence of uncertain factors and human factors in the cutting process and improves the accuracy of test data.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a three-dimensional view of a undisturbed soil triaxial sample rotary-drop preparation device of the invention;
FIG. 2 is a top view of the support mechanism of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic structural view of the clamping device;
FIG. 5 is a three-dimensional view of the cutterhead assembly of the present invention;
FIG. 6 is a schematic view of the construction of the cutterhead assembly of the present invention;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;
FIG. 8 is a schematic view of the undisturbed soil triaxial sample rotational-drop preparation apparatus in use;
FIG. 9 is a schematic view of a supporting rod of the present invention;
wherein, 1, undisturbed soil blank; 2. a base; 3. a leveling assembly; 4. a clamping device; 5. a cutting power assembly; 6. a cutter head assembly; 7. a set of support rods; 8. a lifting power assembly; 21. a base plate; 22. a top plate; 23. mounting grooves; 31. leveling the strut; 32. a leveling device; 41. supporting the push rod; 42. a support plate; 43. a fixing ring; 44. an adjusting ring; 45. an arc-shaped slot; 46. a clamping rod; 51. a power frame; 52. cutting the motor; 53. a cutting ring; 61. a body ring; 62. cutting the gear; 63. a driving gear; 64. a cutting tool holder; 65. a cutter; 66. an adjustment hole; 651. a knife handle; 652. a blade; 71. a smooth rod; 72. a screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-9 the present invention provides a undisturbed soil triaxial sample rotational-drop preparation device,
Included
the device comprises a bearing mechanism, a leveling mechanism and a leveling mechanism, wherein the bearing mechanism is used for mounting an undisturbed soil blank 1 and comprises a base 2, and the base 2 is provided with a leveling component 3; the top end of the base 2 is provided with a clamping device 4;
the cutting mechanism is arranged above the inside of the bearing mechanism and is used for cutting the undisturbed soil blank 1 arranged at the top end of the clamping device 4; the cutting mechanism comprises a cutting power assembly 5, the bottom end of the cutting power assembly 5 is detachably connected with a cutter head assembly 6, and the cutter head assembly 6 is used for cutting the undisturbed soil blank 1;
the supporting mechanism is arranged between the bearing mechanism and the cutting mechanism and is used for supporting the cutting mechanism and driving the cutting mechanism to move up and down; the supporting mechanism comprises a supporting rod group 7 which is connected with the cutting mechanism in a sliding mode, a lifting power assembly 8 is arranged at the bottom end of the supporting rod group 7, and the lifting power assembly 8 is fixedly installed at the top end of the base 2.
The device levels the base 2 and the clamping device through the leveling component 3, so that the original state soil triaxial sample obtained by cutting the original state soil blank 1 has high verticality and cannot be inclined by drooling, the test effect of the original state soil triaxial sample is good, and the accuracy of the test result is high; the cutting mechanism drives the cutter disc assembly 6 to rotate through the power assembly, the undisturbed soil blank 1 fixed on the bearing mechanism is cut, the undisturbed soil blank 1 is fixed, and the cutter rotates, so that the influence of the cutting process on the undisturbed soil blank 1 is reduced, and the test error of the obtained undisturbed soil triaxial sample is reduced; the cutter head assembly 6 is convenient to adjust the cutting amount of the cutter, convenient and fast, the cutter does not need to be detached and replaced, and the cutting efficiency is high.
Furthermore, the support rod group 7 comprises two smooth rods 71 fixedly connected with the base 2 and a screw rod 72 in transmission connection with the lifting power assembly 8, the screw rod 72 is in threaded connection with the lifting power assembly 8, the smooth rod 71 is in sliding connection with the cutting power assembly 5, and the cutting mechanism is driven to move up and down by the rotation of the screw rod 72.
Further optimize the scheme, base 2 includes bottom plate 21, and the top rigid coupling of bottom plate 21 has roof 22, and mounting groove 23 has been seted up at the center of roof 22, and clamping device 4 sets up in mounting groove 23. When in use, the bottom plate 21 is fixed on a flat ground of a test site, and then the top plate 22 is leveled through the leveling component 3, so that the verticality of the undisturbed soil blank 1 clamped on the top plate 22 is ensured.
According to a further optimized scheme, the leveling component 3 comprises a plurality of leveling supports 31 and leveling devices 32, the plurality of leveling supports 31 are circumferentially and equidistantly vertically fixed on the top surface of the base 2, and the top surfaces of the leveling supports 31 are fixedly connected with the bottom surface of the top plate 22; the leveling device 32 is arranged at the top end of the clamping device 4. The levelness of the clamping device 4 arranged on the top plate 22 through the leveling device 32 moves through the leveling support 31 between the bottom plate 21 and the top plate 22 to level. The working principle and the leveling method of the leveling support 31 are prior art and will not be described herein.
Further, the leveling device 32 includes, but is not limited to, a bubble level and a level sensor, and the working principle and the using method of the two are prior art and will not be described herein.
In a further optimized scheme, the clamping device 4 comprises a supporting mechanism arranged in the mounting groove 23 and a clamping component fixedly mounted on the top surface of the top plate 22; the bearing mechanism comprises a bearing push rod 41 fixedly arranged at the bottom end of the mounting groove 23, the output end of the bearing push rod 41 is fixedly connected with a bearing plate 42, the bearing plate 42 is matched with the mounting groove 23, and the leveling device 32 is arranged at the top end of the bearing plate 42; the clamping device 4 and the mounting groove 23 are arranged concentrically; the clamping assembly comprises a fixing ring 43 fixedly connected to the top surface of the top plate 22, and an adjusting ring 44 is rotatably connected to the outer side of the fixing ring 43; a plurality of arc walls 45 have been seted up to the inner chamber of adjustable ring 44, and sliding connection has the one end of supporting rod 46 in the arc wall 45, and the other end of supporting rod 46 stretches out the lateral wall of solid fixed ring 43 and with solid fixed ring 43 sliding connection. When in use, the top plate 22 is leveled through the leveling component 3, so that the bearing plate 42 is leveled, and the verticality of the undisturbed soil blank 1 fixed on the bearing plate 42 is ensured; the distances between the two ends of the arc-shaped groove 45 and the fixing ring 43 are different, and the two ends of the arc-shaped groove 45 change smoothly; when in use, the bearing push rod 41 is used for lifting the bearing plate 42 out of the mounting groove 23, then the undisturbed soil blank 1 is placed on the bearing plate 42, and then the bearing plate 42 is lowered into the mounting groove 23; the adjusting ring 44 is rotated, the arc-shaped groove 45 rotates along with the adjusting ring 44, the clamping rod 46 extends out of the undisturbed soil blank 1 under the pushing of the arc-shaped groove 45, and finally the undisturbed soil blank 1 is clamped at the central position of the bearing plate 42. The plurality of support rods move synchronously, so that the position of the undisturbed soil blank 1 cannot deviate.
In a further optimized scheme, the cutting power assembly 5 comprises a power frame 51 connected with the support rod group 7 in a sliding manner, a cutting motor 52 is fixedly mounted at the top end of the power frame 51, and the output end of the cutting motor 52 extends into the inner cavity of the power frame 51 and is connected with a cutting ring 53 in a meshing manner; the cutting ring 53 is rotatably connected with the power frame 51, and the bottom end of the cutting ring 53 is detachably connected with the cutter disc assembly 6. The cutting motor 52 drives the cutting ring 53 to rotate, and further drives the cutter head assembly 6 below the cutting ring 53 to rotate at a high speed, so as to complete the cutting operation.
Further, the rotation speed of the cutting motor 52 includes a plurality of gears, and is selected according to the soil quality of different undisturbed soil blanks 1.
In a further optimized scheme, the cutter head assembly 6 comprises a body ring 61 detachably connected with the cutting ring 53, a cutting gear 62 is rotatably connected in a ring body cavity of the body ring 61, a plurality of cutting tool holders 64 are engaged and connected with the top surface of the cutting gear 62 at equal intervals in the circumferential direction, and the cutting tool holders 64 are connected with the side wall of the body ring 61 in a sliding manner; the cutting knife holder 64 is fixedly connected with a cutting knife 65 towards the tail end of the inner circle direction of the body ring 61. The cutting gear 62 rotates to drive the cutting tool holder 64 engaged with the tip of the cutting gear 62 to move toward the center or away from the center at the same time, thereby adjusting the position of the cutting tool 65 and thus changing the cutting diameter.
Furthermore, the top end of the body ring 61 is provided with an adjusting hole 66, the lower end of the adjusting hole 66 is rotatably connected with a driving gear 63, the side wall of the driving gear 63 is meshed with the cutting gear 62, and the driving gear 63 is rotated by a hexagonal wrench to drive the cutting gear 62 to rotate to complete adjustment.
Further, the cutter 65 comprises a cutter handle 651, the top end of the cutter handle 651 is fixedly connected with the cutting tool holder 64, the bottom end of the cutter handle 651 is fixedly connected with a blade 652, the blades 652 form a ring shape, and the blades 652 have a certain angle, so that the cutting is facilitated.
A further optimization scheme of the using method of the undisturbed soil triaxial sample rotational-reduction preparation device comprises the following steps:
sampling the undisturbed soil blank 1 and checking the internal liquidity of the undisturbed soil blank 1; and (3) adopting a soil sample of a target stratum through a special sampler to obtain an undisturbed soil blank 1, wherein the shape of the undisturbed soil blank 1 is larger than that of a final undisturbed soil triaxial sample, and reserving enough allowance.
Leveling and supporting mechanism; and (3) measuring by an evaluation device, adjusting the leveling support 31, leveling the top surface of the bearing plate 42 in the installation groove 23, and keeping the verticality of the original soil blank 1 after installation.
Clamping an undisturbed soil blank 1; the bearing is pushed futilely and is lifted the support rod and go out mounting groove 23, then puts the native blank 1 of original state on the bearing board 42, descends the bearing board 42 again into mounting groove 23 in, rotates adjustable ring 44, and arc 45 rotates along with adjustable ring 44, and clamping rod 46 stretches out to native blank 1 of original state under the promotion of arc 45, finally with native blank 1 centre gripping of original state in the central point of bearing board 42.
Erecting a cutting mechanism and adjusting a cutter head assembly 6; installing a cutting structure at a certain position above the undisturbed soil blank 1, then rotating a driving gear 63 by using a hexagonal wrench to drive a cutting tool rest 64 meshed with the top end of a cutting gear 62 to move towards the center or move away from the center at the same time, further adjusting the position of a cutter 65, and further changing the cutting diameter to enable the cutting diameter to be slightly smaller than the diameter of the undisturbed soil blank 1; the feed amount of cutting is determined according to the soil property of the undisturbed soil blank 1.
Cutting an undisturbed soil blank 1; starting the cutting motor 52 to drive the cutter 65 to rotate, and cutting the outer edge of the undisturbed soil blank 1; simultaneously, the lifting power assembly 8 is started to drive the screw 72 to rotate, so that the cutting mechanism slowly descends until the cutter 65 cuts to a position close to the clamping device; stopping the cutting motor 52, and lifting the cutting structure above the top end of the undisturbed soil blank 1 by the reverse rotation lifting power assembly 8; and reducing the cutting diameter again, and repeating the cutting step until the diameter of the undisturbed soil blank 1 reaches the preset requirement.
And cleaning the cuttings to obtain an undisturbed soil triaxial sample. And cleaning the cut crushed soil, sawing the undisturbed soil blank 1 from the cutting tail end at the lower end, and sawing off a section of undisturbed soil blank 1 from the upper part of the undisturbed soil blank 1 to ensure that the rest undisturbed soil blank 1 has the same size as the designed size, thereby obtaining the undisturbed soil triaxial sample.
In the further optimized scheme, in the step of cutting the undisturbed soil blank 1, cutting is stopped and one chip is cleaned every time the undisturbed soil blank 1 is cut to 1/3/-1/2/height. Cutting is stopped at intervals, chips are cleaned, and the chips are prevented from influencing the cutting accuracy.
Sampling the undisturbed soil blank 1 and checking the internal liquidity of the undisturbed soil blank 1; and (3) adopting a soil sample of a target stratum through a special sampler to obtain an undisturbed soil blank 1, wherein the shape of the undisturbed soil blank 1 is larger than that of a final undisturbed soil triaxial sample, and reserving enough allowance.
Leveling and supporting mechanism; and (3) measuring by an evaluation device, adjusting the leveling support 31, leveling the top surface of the bearing plate 42 in the installation groove 23, and determining the verticality of the original soil blank 1 after installation.
Clamping an undisturbed soil blank 1; the supporting push rod 41 lifts the supporting plate 42 out of the mounting groove 23, then the undisturbed soil blank 1 is placed on the supporting plate 42, then the supporting plate 42 is lowered into the mounting groove 23, the adjusting ring 44 is rotated, the arc-shaped groove 45 rotates along with the adjusting ring 44, the clamping rod 46 extends out of the undisturbed soil blank 1 under the pushing of the arc-shaped groove 45, and finally the undisturbed soil blank 1 is clamped at the central position of the supporting plate 42.
Erecting a cutting mechanism and adjusting a cutter head assembly 6; installing a cutting structure at a certain position above the undisturbed soil blank 1, then rotating a driving gear 63 by using a hexagonal wrench to drive a cutting tool rest 64 meshed with the top end of a cutting gear 62 to move towards the center or move away from the center at the same time, further adjusting the position of a cutter 65, and further changing the cutting diameter to enable the cutting diameter to be slightly smaller than the diameter of the undisturbed soil blank 1; the feeding amount of cutting is determined according to the soil property of the undisturbed soil blank.
Cutting an undisturbed soil blank 1; starting the cutting motor 52 to drive the cutter 65 to rotate, and cutting the outer edge of the undisturbed soil blank 1; simultaneously, the lifting power assembly 8 is started to drive the screw 72 to rotate, so that the cutting mechanism slowly descends until the cutter 65 cuts to a position close to the clamping device; stopping the cutting motor 52, and lifting the cutting structure above the top end of the undisturbed soil blank 1 by the reverse rotation lifting power assembly 8; and reducing the cutting diameter again, and repeating the cutting step until the diameter of the undisturbed soil blank reaches the preset requirement.
And cleaning the cuttings to obtain an undisturbed soil triaxial sample. And cleaning the cut crushed soil, sawing the undisturbed soil blank 1 from the cutting tail end at the lower end, and sawing off a section of undisturbed soil blank from the upper part of the undisturbed soil blank to ensure that the rest undisturbed soil blank 1 has the same size as the designed size, thereby obtaining the undisturbed soil triaxial sample.
In the further optimized scheme, in the step of cutting the undisturbed soil blank 1, cutting is stopped and one chip is cleaned every time the undisturbed soil blank 1 is cut to 1/3/-1/2/height. Cutting is stopped at intervals, chips are cleaned, and the chips are prevented from influencing the cutting accuracy.
The using method comprises the following steps:
and (3) adopting a soil sample of a target stratum through a special sampler to obtain an undisturbed soil blank 1, wherein the shape of the undisturbed soil blank 1 is larger than that of a final undisturbed soil triaxial sample, and reserving enough allowance.
The leveling device 32 is used for measuring, adjusting the leveling support 31, leveling the top surface of the bearing plate 42 in the installation groove 23, and ensuring the verticality of the undisturbed soil blank 1 after installation.
The supporting push rod 41 lifts the supporting plate 42 out of the mounting groove 23, then the undisturbed soil blank 1 is placed on the supporting plate 42, then the supporting plate 42 is lowered into the mounting groove 23, the adjusting ring 44 is rotated, the arc-shaped groove 45 rotates along with the adjusting ring 44, the clamping rod 46 extends out of the undisturbed soil blank 1 under the pushing of the arc-shaped groove 45, and finally the undisturbed soil blank 1 is clamped at the central position of the supporting plate 42.
Installing a cutting structure at a certain position above the undisturbed soil blank 1, then rotating a driving gear 63 by using a hexagonal wrench to drive a cutting tool rest 64 meshed with the top end of a cutting gear 62 to move towards the center or move away from the center at the same time, further adjusting the position of a cutter 65, and further changing the cutting diameter to enable the cutting diameter to be slightly smaller than the diameter of the undisturbed soil blank 1; the feed amount of cutting is determined according to the soil property of the undisturbed soil blank 1.
Starting the cutting motor 52 to drive the cutter 65 to rotate, and cutting the outer edge of the undisturbed soil blank 1; simultaneously, the lifting power assembly 8 is started to drive the screw 72 to rotate, so that the cutting mechanism slowly descends until the cutter 65 cuts to a position close to the clamping device; stopping the cutting motor 52, and lifting the cutting structure above the top end of the undisturbed soil blank 1 by the reverse rotation lifting power assembly 8; and reducing the cutting diameter again, and repeating the cutting step until the diameter of the undisturbed soil blank 1 reaches the preset requirement. In the cutting process, cutting is stopped at intervals, chips are cleaned, and the cutting accuracy is prevented from being influenced by the chips.
And cleaning the cut crushed soil, sawing the undisturbed soil blank 1 from the cutting tail end at the lower end, and sawing off a section of undisturbed soil blank 1 from the upper part of the undisturbed soil blank 1 to ensure that the rest undisturbed soil blank 1 has the same size as the designed size, thereby obtaining the undisturbed soil triaxial sample.
The invention has simple structure and concise operation method, has little influence on the undisturbed soil blank 1 in the cutting process, avoids the influence of uncertain factors and human factors in the cutting process and improves the accuracy of test data.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a device is prepared to original state soil triaxial sample soon falls which characterized in that: comprises that
The bearing mechanism is used for installing an undisturbed soil blank (1), and comprises a base (2), wherein a leveling component (3) is arranged on the base (2); the top end of the base (2) is provided with a clamping device (4);
the cutting mechanism is arranged above the inside of the bearing mechanism and is used for cutting the undisturbed soil blank (1) arranged at the top end of the clamping device (4); the cutting mechanism comprises a cutting power assembly (5), the bottom end of the cutting power assembly (5) is detachably connected with a cutter head assembly (6), and the cutter head assembly (6) is used for cutting the undisturbed soil blank (1);
the supporting mechanism is arranged between the bearing mechanism and the cutting mechanism and is used for supporting the cutting mechanism and driving the cutting mechanism to move up and down; the supporting mechanism comprises a supporting rod group (7) which is connected with the cutting mechanism in a sliding mode, a lifting power assembly (8) is arranged at the bottom end of the supporting rod group (7), and the lifting power assembly (8) is fixedly installed at the top end of the base (2).
2. The undisturbed soil triaxial sample rotary-drop preparation device according to claim 1, characterized in that: the base (2) comprises a bottom plate (21), a top plate (22) is fixedly connected to the top end of the bottom plate (21), a mounting groove (23) is formed in the center of the top plate (22), and the clamping device (4) is arranged in the mounting groove (23).
3. The undisturbed soil triaxial sample rotary-drop preparation device according to claim 2, characterized in that: the leveling component (3) comprises a plurality of leveling supports (31) and leveling devices (32), the leveling supports (31) are circumferentially and vertically fixed on the top surface of the base (2) at equal intervals, and the top surfaces of the leveling supports (31) are fixedly connected with the bottom surface of the top plate (22); the leveling device (32) is arranged at the top end of the clamping device (4).
4. The undisturbed soil triaxial sample rotary-drop preparation device according to claim 3, characterized in that: the clamping device (4) comprises a supporting mechanism arranged in the mounting groove (23) and a clamping component fixedly mounted on the top surface of the top plate (22); the bearing mechanism comprises a bearing push rod (41) fixedly mounted at the bottom end of the mounting groove (23), the output end of the bearing push rod (41) is fixedly connected with a bearing plate (42), the bearing plate (42) is matched with the mounting groove (23), and the leveling device (32) is arranged at the top end of the bearing plate (42); the clamping device (4) and the mounting groove (23) are arranged concentrically.
5. The undisturbed soil triaxial sample rotary-drop preparation device according to claim 4, characterized in that: the clamping assembly comprises a fixing ring (43) fixedly connected to the top surface of the top plate (22), and an adjusting ring (44) is rotatably connected to the outer side of the fixing ring (43); a plurality of arc walls (45) have been seted up to the inner chamber of adjustable ring (44), sliding connection has the one end of supporting rod (46) in arc wall (45), the other end of supporting rod (46) stretches out the lateral wall of solid fixed ring (43) and with gu fixed ring (43) sliding connection.
6. The undisturbed soil triaxial sample rotary-drop preparation device according to claim 1, characterized in that: the cutting power assembly (5) comprises a power frame (51) connected with the support rod group in a sliding mode, a cutting motor (52) is fixedly mounted at the top end of the power frame (51), and the output end of the cutting motor (52) extends into the inner cavity of the power frame (51) and is connected with a cutting ring (53) in a meshing mode; cutting ring (53) with power frame (51) rotate to be connected, the bottom of cutting ring (53) can be dismantled and be connected with cutter disc assembly (6).
7. The undisturbed soil triaxial sample rotary-drop preparation device according to claim 6, characterized in that: the cutter head assembly (6) comprises a body ring (61) detachably connected with the cutting ring (53), a cutting gear (62) is rotationally connected in a ring body cavity of the body ring (61), a plurality of cutting tool holders (64) are meshed and connected with the top surface of the cutting gear (62) in a circumferential and equidistant mode, and the cutting tool holders (64) are connected with the side wall of the body ring (61) in a sliding mode; the cutting knife rest (64) is fixedly connected with a cutting knife (65) towards the tail end of the inner circle direction of the body ring (61).
8. A rotational-reduction preparation method of a triaxial undisturbed soil sample, wherein the rotational-reduction preparation device of the triaxial undisturbed soil sample according to any one of claims 1 to 7 is characterized by comprising the following steps:
sampling the undisturbed soil blank (1) and checking the internal liquidity of the undisturbed soil blank (1);
leveling and supporting mechanism;
clamping an undisturbed soil blank (1);
erecting a cutting mechanism and adjusting a cutter head assembly (6);
cutting an undisturbed soil blank (1);
and cleaning the cuttings to obtain an undisturbed soil triaxial sample.
9. The undisturbed soil triaxial sample rotary-drop preparation method according to claim 8, characterized in that: in the step of cutting the undisturbed soil blank, the cutting needs to be carried out for a plurality of times, each time of cutting is carried out from the top end to the bottom end of the undisturbed soil blank (1), then the cutting mechanism is lifted, and the cutter head assembly (6) is adjusted again for cutting.
10. The undisturbed soil triaxial sample rotary-drop preparation method according to claim 8, characterized in that: in the step of cutting the undisturbed soil blank, cutting is stopped and primary chips are cleaned each time when 1/3-1/2 of the height of the undisturbed soil blank (1) is cut.
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| CN202111363767.7A CN114062082B (en) | 2021-11-17 | 2021-11-17 | Device and method for preparing undisturbed soil triaxial sample through spin-drop |
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| CN115319642A (en) * | 2022-10-12 | 2022-11-11 | 无锡市锡西化机配件有限公司 | Automatic clamping equipment for machining high-pressure sealing gasket |
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