CN117268842A - Sampling device for geotechnical engineering investigation and application method thereof - Google Patents
Sampling device for geotechnical engineering investigation and application method thereof Download PDFInfo
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- CN117268842A CN117268842A CN202311571333.5A CN202311571333A CN117268842A CN 117268842 A CN117268842 A CN 117268842A CN 202311571333 A CN202311571333 A CN 202311571333A CN 117268842 A CN117268842 A CN 117268842A
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- 238000005070 sampling Methods 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000011835 investigation Methods 0.000 title claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 117
- 239000002245 particle Substances 0.000 claims abstract description 59
- 238000013016 damping Methods 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 55
- 239000002184 metal Substances 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 235000014676 Phragmites communis Nutrition 0.000 claims description 22
- 238000001125 extrusion Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 13
- 244000273256 Phragmites communis Species 0.000 claims description 12
- 230000008054 signal transmission Effects 0.000 claims description 11
- 229910001018 Cast iron Inorganic materials 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000012798 spherical particle Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 19
- 238000005299 abrasion Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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Abstract
The invention discloses a sampling device for geotechnical engineering investigation and a use method thereof, wherein the sampling device for geotechnical engineering investigation comprises a sampling tube which is detachably connected to the bottom end part of a drill rod, the bottom of the sampling tube is connected with a corresponding drill bit, and the middle part of the drill bit is provided with a sample inlet hole; a sample-receiving tube having a bottom portion fixedly attached to an upper end portion of the drill bit; the multifunctional sample propping mechanism comprises a pushing plate, metal damping particles and a spherical grinding ball, wherein the drill bit is used for drilling and sampling rock, a cylindrical rock sample continuously enters the sample accommodating tube and gradually pushes the pushing plate, when the pushing plate is pushed to a set height, the outer end of the spherical grinding ball is propped against the outer side wall of the cylindrical rock sample, and the bottom side of the high-hardness cylindrical rock sample forms a section after being stressed. The invention can effectively ensure the sampling integrity of rock samples and the service life of products.
Description
Technical Field
The invention relates to auxiliary equipment for geotechnical engineering investigation, in particular to a use method of a sampling device for geotechnical engineering investigation, which is mainly used for sampling rock samples in the geotechnical engineering investigation process.
Background
The object of geotechnical engineering research is rock mass and soil mass, and in the geotechnical engineering investigation process, stratum layers and depths according to geological design are required to be developed for drilling work, and soil mass sampling or rock mass sampling is carried out according to sampling requirements.
The existing rock sampler for engineering investigation generally comprises a rock sampling tube connected to a drill rod and a drill bit arranged at the bottom side of the rock sampling tube, wherein a cylindrical rock sample is drilled and taken down from a rock body through the drill bit, the cylindrical rock sample is stored through the rock sampling tube, after sampling is completed, the drill rod and the rock sampling tube provided with the drill bit are taken out, and the cylindrical rock sample is separated from the rock sampling tube in a knocking mode and the like.
Such sampling devices have the following drawbacks when sampling rock: 1) The connection between the cylindrical rock sample and the parent rock cannot be cut off in time, so that the problem that the cylindrical rock sample is easily separated from the rock sampling tube partially in the process of taking out the rock sampling tube is caused, and the problem of insufficient integrity of the sampling is caused; 2) The vibration and abrasion of the rock sampling tube in the sampling process are relatively serious, so that the service life of the product cannot meet the design requirements.
Therefore, the cylindrical rock sample after drilling can be effectively and timely cut off, so that the sampling integrity of the rock sample is ensured; and the vibration and abrasion loss of the rock sampling tube in the rock sampling process can be effectively reduced, so that the sampling device for geotechnical engineering investigation for prolonging the service life of the product and the use method thereof are the research purposes of the invention.
Disclosure of Invention
The invention aims at solving the technical problems in the prior art, and provides a sampling device for geotechnical engineering investigation and a using method thereof.
The technical scheme of the invention is as follows:
a sampling device for geotechnical engineering investigation comprises
The top of the sampling tube is detachably connected to the bottom end part of a corresponding drill rod, the bottom of the sampling tube is fixedly connected with a corresponding drill bit, the drill bit and the sampling tube are coaxially arranged, and the middle part of the drill bit is provided with a sample inlet hole communicated with the sampling tube;
the sample containing tube is fixedly sleeved in the sampling tube in a coaxial state, the bottom of the sample containing tube is fixedly connected to the upper end part of the drill bit, and the inner diameter of the sample containing tube is larger than the aperture of the sample inlet hole;
the multifunctional sample propping mechanism comprises a push plate which can be installed in the guide pipe in a vertical moving way, and a plurality of metal damping particles are filled in a space formed by the space between the sample accommodating pipe, the guide pipe and the sampling pipe and the space formed by the guide pipe on the upper side of the push plate; the bottom end of the sample containing tube is provided with at least two corresponding guide holes at equal angles, the outer sides of the guide holes are respectively fixedly welded with a plurality of reeds at equal angles, the multifunctional sample propping mechanism further comprises a spherical grinding ball capable of moving back and forth along the guide holes, under the gravity extrusion of the metal damping particles, the outer sides of the spherical grinding balls prop against the reeds, and the outer ends of the spherical grinding balls are positioned between the intervals of the reeds, so that the spherical grinding balls are integrally positioned at the inner sides of the reeds; the drill bit is used for drilling and sampling the rock, a cylindrical rock sample continuously enters the sample accommodating tube and gradually pushes the pushing plate so as to squeeze a plurality of metal damping particles, so that the mutual extrusion force of the metal damping particles is gradually increased, the spherical grinding ball is fully pushed, when the pushing plate is pushed to a set height, the spherical grinding ball pushes the reed to form everting deformation under the extrusion of the metal damping particles, the outer end part of the spherical grinding ball is tightly pushed to the outer side wall of the cylindrical rock sample, most of the spherical grinding ball is blocked by the reed, and the bottom side of the cylindrical rock sample forms a section after being stressed.
The sampling device for geotechnical engineering investigation further comprises a signal transmission mechanism, the top of the sampling tube is detachably connected to the bottom end portion of the drill rod in a threaded connection mode, a corresponding fixing groove is formed in the joint portion fixing clamp of the sampling tube and the drill rod, the top of the guide tube and the bottom of the fixing groove are arranged at intervals, the signal transmission mechanism comprises an electric controller fixedly arranged in the fixing groove, a vibration sensor and a signal transmitter, the vibration sensor and the signal transmitter are connected to the electric controller, and the electric controller is powered by a corresponding small lithium battery.
The electric controller adopts a STEM32F10x main control chip, and the signal transmitter is a Bluetooth module or a wifi module and is connected to the STEM32F10x main control chip.
The side wall of the fixed groove is in a cylindrical shape, the outer diameter of the guide pipe is smaller than that of the fixed groove, and a handle for drawing the fixed groove is fixedly connected to the fixed groove.
The spherical grinding balls are made of high-wear-resistance cast iron, the metal damping particles are spherical particles made of high-wear-resistance cast iron, and the particle size of the spherical grinding balls is more than three times that of the metal damping particles.
The application method of the sampling device for geotechnical engineering investigation comprises the following steps:
s1, starting a corresponding driving mechanism to drive the drill rod to drive the drill bit to rotate so as to sample rock, and enabling a cylindrical rock sample to gradually extend into the sample accommodating tube through the sample inlet hole;
s2, gradually pushing the pushing plate by the top of the cylindrical rock sample, gradually extruding a plurality of metal damping particles by the pushing plate, gradually lifting the extrusion force of the metal damping particles to form a sufficient thrust force for the spherical grinding ball, enabling the outer end of the spherical grinding ball to break through the elasticity of the reed and then extend out and be fixedly propped against the bottom side of the cylindrical rock sample, forming a section on the bottom side of the cylindrical rock sample after being stressed, and fixing the truncated cylindrical rock sample between the pushing plate and the outer end of the spherical grinding ball;
s3, stopping the driving mechanism, taking out the drill rod and the sampling tube, detaching the sampling tube from the drill rod, pouring out and collecting the metal damping particles, and finally turning down the upper end part of the sampling tube to take out the cylindrical rock sample and the push plate;
s4, collecting and processing the cylindrical rock sample, and cleaning and storing the drill rod and the sampling tube for the next sampling.
In the step S2, vibration signals are obtained in real time through a vibration sensor and transmitted to the electric controller, and when the pushing plate pushes the metal damping particles, the friction energy consumption effect among the metal damping particles is gradually improved so as to gradually improve the vibration reduction effect; therefore, when the vibration signal acquired by the vibration sensor is gradually reduced, the cylindrical rock sample is judged to start pushing the push plate, and the signal is sent to the corresponding signal receiving end through the signal transmitter.
After the cylindrical rock sample forms a section, the cylindrical rock sample is fixed between the pushing plate and the outer end part of the spherical grinding ball, so that the cylindrical rock sample and the rock layer form a partition, and at the moment, the vibration quantity is further reduced and kept; therefore, when the vibration signal collected by the vibration sensor is reduced to the minimum value, and at t 1 And when the duration is kept within the minimum range, judging that the cylindrical rock sample is successfully cut off, and transmitting a signal to a corresponding signal receiving end through a signal transmitter.
The signal receiving end is one of a mobile phone or a computer.
The invention has the advantages that:
1) The invention adds a sample holding tube on the basis of the sampling tube, the upper end part of the sample holding tube is provided with a conduit with a diameter larger than that of the sample holding tube in a step hole shape, and the sample holding tube, the outer side wall of the conduit and the inner side wall of the sampling tube are arranged at intervals. Therefore, the push plate of the multifunctional sample pushing mechanism can be installed in the guide pipe in a vertically movable manner, and then the spherical grinding ball of the multifunctional sample pushing mechanism can be installed in the guide hole at the bottom end part of the sample accommodating pipe in a movable manner; and finally, filling a plurality of metal damping particles in the space formed by the sample containing tube, the space between the guide tube and the sampling tube and the space formed by the guide tube on the upper side of the push plate, wherein the filling quantity of the preliminarily filled metal damping particles is more than 85% of the filling space.
When the drill bit is used for drilling and sampling rock, a cylindrical rock sample continuously enters the sample accommodating tube and gradually pushes the pushing plate to extrude a plurality of metal damping particles, so that the extrusion force among the metal damping particles is gradually increased, further, sufficient thrust is formed for the spherical grinding ball, and when the pushing plate is pushed to a set height, the outer end part of the spherical grinding ball is tightly pushed against the outer side wall of the cylindrical rock sample, so that the bottom side of the high-hardness cylindrical rock sample is stressed at a fixed point to form a section.
Therefore, the cylindrical rock sample after drilling can be effectively and timely truncated to ensure the sampling integrity of the rock sample, and the truncated cylindrical rock sample is fixed between the pushing plate and the outer end part of the spherical grinding ball, so that the truncated cylindrical rock sample can be smoothly taken out.
2) Due to the improved design of the multifunctional sample propping mechanism, the truncated cylindrical rock sample can be fixed by the push plate and the spherical grinding ball, so that the inner diameter of the sample holding tube can be set to be larger than the aperture of the sample inlet hole, and the outer end part of the spherical grinding ball can prop up and apply force to the rock sample after extending out to form a section, so that the gap between the rock sample and the inner side wall of the sample holding tube is formed, the abrasion amount of the sampling tube in the rock sampling process is effectively reduced, and the service life of a product is prolonged.
3) The metal damping particles of the multifunctional sample propping mechanism not only can form external thrust to the spherical grinding balls after being mutually extruded so as to ensure the practical effect of the multifunctional sample propping mechanism, but also can form sufficient friction energy consumption effect among the metal damping particles along with the reinforcement of extrusion among the metal damping particles, thereby effectively reducing the vibration quantity of the sampling tube in the rock sampling process and further prolonging the service life of the product.
4) The existing sampling device for geotechnical engineering investigation has the defect that whether sampling is completed or not cannot be judged rapidly in the actual use process, so that the controllability of the sampling process is extremely low. Therefore, the invention further comprises a signal transmission mechanism, and in the use process, the vibration signal can be obtained in real time through the vibration sensor of the signal transmission mechanism. When the vibration signal acquired by the vibration sensor is gradually reduced, judging that the cylindrical rock sample starts to push the push plate; when the vibration signal collected by the vibration sensor is reduced to the minimum value, and at t 1 And when the duration is kept within the minimum range, judging that the cylindrical rock sample is successfully cut off, and transmitting a signal to a corresponding signal receiving end through a signal transmitter.
Through the setting of metallic damping particles, not only can form a great deal of technical effect, and can form control to the vibration volume to make vibration sensor can judge the process of sampling through obtaining vibration signal, in order to promote the controllability of sampling process by a wide margin.
5) According to the invention, after sampling is completed, metal damping particles can be poured and collected, and the cylindrical rock sample and the push plate can be taken out by downwards turning the upper end part of the sampling tube, so that the sampling tube is convenient and fast, and the cylindrical rock sample can be taken out without knocking the sampling tube, so that the service life of the sampling tube is further prolonged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a partial enlarged view of fig. 2.
Fig. 4 is a sectional view showing a use state of the present invention.
Fig. 5 is a partial enlarged view of fig. 4.
In the accompanying drawings: the sample tube 1, the drill rod 2, the drill bit 3, the sample inlet hole 301, the sample holding tube 4, the multifunctional sample pushing mechanism 5, the push plate 501, the metal damping particles 502, the spherical grinding balls 503, the guide tube 6, the cylindrical rock sample 7, the signal transmission mechanism 8, the electric controller 801, the vibration sensor 802, the signal transmitter 803, the small lithium battery 804, the fixed slot 9, the handle 10 and the reed 11.
Detailed Description
For the convenience of understanding by those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings:
example 1
1-5, a sampling device for geotechnical engineering investigation comprises
The sampling tube 1, the top of the sampling tube 1 is detachably connected to the bottom end part of a corresponding drill rod 2, the bottom of the sampling tube 1 is fixedly connected with a corresponding drill bit 3, the drill bit 3 and the sampling tube 1 are coaxially arranged, and a sample inlet hole 301 communicated with the sampling tube 1 is formed in the middle of the drill bit 3;
the sample containing tube 4 is fixedly sleeved in the sampling tube 1 in a coaxial state, the bottom of the sample containing tube 4 is fixedly connected to the upper end part of the drill bit 3, and the inner diameter of the sample containing tube 4 is larger than the aperture of the sample inlet hole 301;
the multifunctional sample propping mechanism 5, the upper end of the sample holding tube 4 is provided with a conduit 6 with a step hole shape and a pore diameter larger than that of the sample holding tube 4, the outer side wall of the conduit 6 and the inner side wall of the sampling tube 1 are arranged at intervals, the top of the conduit 6 and the bottom end of the drill rod 2 are arranged at intervals, the multifunctional sample propping mechanism 5 comprises a push plate 501 which can be installed in the conduit 6 in a vertical moving way, and a plurality of metal damping particles 502 are filled in a space formed by the intervals of the sample holding tube 4, the conduit 6 and the sampling tube 1 and the conduit 6 on the upper side of the push plate 501; the bottom end of the sample holding tube 4 is provided with four corresponding guide holes at equal angles, the outer sides of the guide holes are respectively fixedly welded with a plurality of reeds 11 at equal angles, the multifunctional sample propping mechanism 5 further comprises a spherical grinding ball 503 which can move back and forth along the guide holes, under the gravity extrusion of the metal damping particles 502, the outer sides of the spherical grinding balls 503 are propped against the reeds 11, and the outer ends of the spherical grinding balls 503 are positioned between the intervals of the reeds 11, so that the spherical grinding balls 503 are wholly positioned at the inner sides of the reeds 11; the drill bit 3 is used for drilling and sampling the rock, the cylindrical rock sample 7 continuously enters the sample accommodating tube 4 and gradually pushes the push plate 501 so as to squeeze the metal damping particles 502, the mutual extrusion force of the metal damping particles 502 is gradually increased, the spherical grinding ball 503 is further fully pushed, when the push plate 501 is pushed to a set height, the spherical grinding ball 503 pushes the reed 11 to form everting deformation under the extrusion of the metal damping particles 502, the outer end part of the spherical grinding ball 503 is tightly propped against the outer side wall of the cylindrical rock sample 7, the spherical grinding ball 503 is mostly blocked by the reed 11, so that the spherical grinding ball 503 is prevented from being separated from the guide hole, and the bottom side of the cylindrical rock sample 7 forms a section after being stressed.
The spherical grinding balls 503 are made of high-wear-resistance cast iron, the metal damping particles 502 are spherical particles made of high-wear-resistance cast iron, and the particle size of the spherical grinding balls 503 is 5-8 times that of the metal damping particles 502.
The invention adds a sample holding tube 4 on the basis of a sampling tube 1, the upper end part of the sample holding tube is provided with a conduit 6 with a diameter larger than that of the sample holding tube 4 in a step hole shape, and the sample holding tube 4, the outer side wall of the conduit 6 and the inner side wall of the sampling tube 1 are arranged at intervals. In this way, the push plate 501 of the multifunctional sample pushing mechanism 5 of the invention can be installed in the guide pipe 6 in a vertically movable manner, and then the spherical grinding ball of the multifunctional sample pushing mechanism 5 can be installed in the guide hole at the bottom end part of the sample holding pipe in a movable manner; finally, a plurality of metal damping particles 502 are filled in the space formed by the sample holding tube 4, the space between the guide tube 6 and the sampling tube 1 and the guide tube 6 at the upper side of the push plate 501, and the filling amount of the metal damping particles 502 after the preliminary filling is 85% of the filling space.
When the drill bit 3 drills and samples the rock, the cylindrical rock sample 7 continuously enters the sample containing tube 4 and gradually pushes the pushing plate 501 to squeeze the metal damping particles 502, so that the mutual extrusion force of the metal damping particles 502 is gradually increased, the spherical grinding ball 503 is fully pushed, when the pushing plate 501 is pushed to a set height, the outer end of the spherical grinding ball 503 is tightly pushed against the outer side wall of the cylindrical rock sample 7, and the bottom side of the high-hardness cylindrical rock sample 7 is stressed at a fixed point to form a section.
Therefore, the cylindrical rock sample 7 after drilling can be effectively and timely truncated to ensure the sampling integrity of the rock sample, and the truncated cylindrical rock sample 7 is fixed between the push plate 501 and the outer end part of the spherical grinding ball 503, so that the truncated cylindrical rock sample 7 can be ensured to be taken out smoothly.
Due to the improved design of the multifunctional sample jacking mechanism 5, the truncated cylindrical rock sample 7 can be fixed by the push plate 501 and the spherical grinding ball 503, so that the inner diameter of the sample holding tube 4 can be set to be larger than the aperture of the sample inlet hole 301, and the outer end part of the spherical grinding ball 503 can jack and apply force to the rock sample after extending out to form a section, so that the rock sample and the inner side wall of the sample holding tube 4 are arranged in a clearance mode, the abrasion loss of the sampling tube 1 in the rock sampling process is effectively reduced, and the service life of a product is prolonged.
The metal damping particles 502 of the multifunctional sample propping mechanism 5 not only can form external thrust to the spherical grinding balls 503 after mutual extrusion so as to ensure the practical effect of the multifunctional sample propping mechanism, but also can form sufficient friction energy consumption effect among the metal damping particles 502 along with the reinforcement of extrusion among the metal damping particles 502, thereby effectively reducing the vibration quantity of the sampling tube 1 in the rock sampling process and further prolonging the service life of products.
Example two
The present embodiment differs from the first embodiment in that: the sampling device for geotechnical engineering investigation further comprises a signal transmission mechanism 8, the top of the sampling tube 1 is detachably connected to the bottom end part of the drill rod 2 in a threaded connection mode, a corresponding fixing groove 9 is formed in the joint of the sampling tube 1 and the drill rod 2 in a fixing manner, the top of the guide tube 6 and the bottom of the fixing groove 9 are arranged at intervals, the signal transmission mechanism 8 comprises an electric controller 801 fixed in the fixing groove 9, and a vibration sensor 802 and a signal transmitter 803 connected to the electric controller 801, and the electric controller 801 is powered by a corresponding small lithium battery 804.
The electric controller 801 adopts a STEM32F10x main control chip, and the signal transmitter 803 is a bluetooth module and is connected to the STEM32F10x main control chip.
The side wall of the fixed slot 9 is in a cylindrical shape, the outer diameter of the guide pipe 6 is smaller than the outer diameter of the fixed slot 9, and a handle 10 for drawing the fixed slot 9 is fixedly connected to the fixed slot 9.
The existing sampling device for geotechnical engineering investigation has the defect that whether sampling is completed or not cannot be judged rapidly in the actual use process, so that the controllability of the sampling process is extremely low. For this purpose, the invention further comprises a signal transmission mechanism, and in use, vibration signals can be obtained in real time through the vibration sensor 802 of the signal transmission mechanism 8. When the vibration signal acquired by the vibration sensor 802 is gradually reduced, judging that the cylindrical rock sample 7 starts to push the push plate 502; when the vibration signal collected by the vibration sensor 802 is reduced to a minimum value and remains within the minimum value for a period of 10-30s, it is judged that the cylindrical rock sample 7 is successfully cut off, and the signal is transmitted to the corresponding signal receiving end through the signal transmitter 803.
By arranging the metal damping particles 502, not only a plurality of technical effects can be formed, but also the vibration quantity can be controlled, so that the vibration sensor 802 can judge the sampling process by acquiring the vibration signal, and the controllability of the sampling process is greatly improved.
It should be noted that the implementation principle and the technical effects of the present embodiment are the same as those of the first embodiment, and for brevity, reference may be made to the corresponding content of the first embodiment.
Example III
The method for using the sampling device for geotechnical engineering investigation according to the second embodiment comprises the following steps:
s1, starting a corresponding driving mechanism to drive the drill rod 2 to drive the drill bit 3 to rotate so as to sample rock, and gradually extending a cylindrical rock sample 7 into the sample accommodating tube 4 through the sample inlet hole 301;
s2, gradually pushing the pushing plate 501 by the top of the cylindrical rock sample 7, gradually extruding a plurality of metal damping particles 502 by the pushing plate 501, gradually lifting the extrusion force of the metal damping particles 502 to each other so as to form sufficient thrust for the spherical grinding ball 503, enabling the outer end of the spherical grinding ball 503 to break through the elasticity of the reed 11, then stretching out and fixedly propping against the bottom side of the cylindrical rock sample 7, forming a section on the bottom side of the cylindrical rock sample 7 after being stressed, and fixing the truncated cylindrical rock sample 7 between the pushing plate 501 and the outer end of the spherical grinding ball 503;
s3, stopping the driving mechanism, taking out the drill rod 2 and the sampling tube 1, detaching the sampling tube 1 from the drill rod 2, pouring out and collecting the metal damping particles 502, and finally turning down the upper end of the sampling tube 1 to take out the cylindrical rock sample 7 and the push plate 501;
s4, collecting and processing the cylindrical rock sample 7, and cleaning and storing the drill rod 2 and the sampling tube 1 for the next sampling.
In the process of step S2, a vibration signal is obtained in real time through the vibration sensor 802, and the vibration signal is transmitted to the electric controller 801, so that when the push plate 501 pushes the metal damping particles 502, the friction energy consumption effect among the metal damping particles 502 is gradually improved, and the vibration reduction effect is gradually improved; therefore, when the vibration signal collected by the vibration sensor 802 is in a gradual decrease, it is determined that the cylindrical rock sample 7 starts pushing the push plate 501, and the signal is transmitted to the corresponding signal receiving end through the signal transmitter 803.
After the cylindrical rock sample 7 is formed into a cross section, the cylindrical rock sample 7 is fixed between the push plate 501 and the outer end part of the spherical grinding ball 503, so that the cylindrical rock sample 7 is separated from the rock layer, and at this time, the vibration amount is further reduced and maintained; therefore, when the vibration signal collected by the vibration sensor 802 is reduced to a minimum value and remains within the minimum value range for 10-30 seconds, it is determined that the cylindrical rock sample 7 is successfully cut off, and a signal is transmitted to a corresponding signal receiving end through the signal transmitter 803. In this embodiment, the signal receiving end is a mobile phone.
After the sampling is completed, the metal damping particles 502 can be poured and collected, and the cylindrical rock sample 7 and the push plate 501 can be taken out by turning down the upper end of the sampling tube 1, so that the sampling tube 1 can be conveniently taken out without knocking the sampling tube 1.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. Sampling device is used in geotechnical engineering reconnaissance, its characterized in that: comprising
The sampling tube (1), the top of sampling tube (1) can be dismantled and be connected to the bottom of corresponding drilling rod (2), and the bottom of sampling tube (1) fixedly connected with corresponding drill bit (3), drill bit (3) with sampling tube (1) coaxial arrangement, the middle part of drill bit (3) be provided with sample access hole (301) that sampling tube (1) are linked together;
the sample containing tube (4) is fixedly sleeved in the sampling tube (1) in a coaxial state, the bottom of the sample containing tube (4) is fixedly connected to the upper end part of the drill bit (3), and the inner diameter of the sample containing tube (4) is larger than the aperture of the sample inlet hole (301);
the multifunctional sample jacking mechanism (5) is characterized in that the upper end part of the sample containing tube (4) is provided with a guide tube (6) with a hole diameter larger than that of the sample containing tube (4) in a step hole shape, the outer side wall of the sample containing tube (4) and the guide tube (6) are arranged at intervals with the inner side wall of the sampling tube (1), the top of the guide tube (6) and the bottom end part of the drill rod (2) are arranged at intervals, the multifunctional sample jacking mechanism (5) comprises a push plate (501) which can be installed in the guide tube (6) in a vertically movable mode, and a plurality of metal damping particles (502) are filled in the space formed by the space between the sample containing tube (4), the space between the guide tube (6) and the space formed by the guide tube (6) on the upper side of the push plate (501); the bottom end part of the sample containing tube (4) is provided with at least two corresponding guide holes at equal angles, the outer sides of the guide holes are respectively fixedly welded with a plurality of reeds (11) at equal angles, the multifunctional sample propping mechanism (5) further comprises a spherical grinding ball (503) capable of moving back and forth along the guide holes, under the gravity extrusion of the metal damping particles (502), the outer sides of the spherical grinding balls (503) are propped against the reeds (11), and the outer ends of the spherical grinding balls (503) are positioned between the intervals of the reeds (11), so that the spherical grinding balls (503) are integrally positioned at the inner sides of the reeds (11); the drill bit (3) is used for drilling and sampling the rock, a cylindrical rock sample (7) continuously enters the sample accommodating tube (4) and gradually pushes the pushing plate (501) to extrude a plurality of metal damping particles (502), so that the extrusion force of the metal damping particles (502) is gradually increased, the spherical grinding balls (503) are fully pushed, when the pushing plate (501) is pushed to a set height, the spherical grinding balls (503) push the reed (11) to form everting deformation under the extrusion of the metal damping particles (502), the outer end parts of the spherical grinding balls (503) are tightly propped against the outer side wall of the cylindrical rock sample (7), most of the spherical grinding balls (503) are blocked by the reed (11), and the bottom side of the cylindrical rock sample (7) forms a section after being stressed.
2. A sampling device for geotechnical engineering investigation according to claim 1, wherein: sampling device for geotechnical engineering reconnaissance still includes signal transmission mechanism (8), the top of sampling tube (1) is through threaded connection mode detachable to the bottom of drilling rod (2), sampling tube (1) with junction fixation clamp of drilling rod (2) is equipped with a corresponding fixed slot (9), the top of pipe (6) with be the interval setting between the tank bottom of fixed slot (9), signal transmission mechanism (8) contain fixed device in electric controller (801) in fixed slot (9), and connect in vibration sensor (802) and signal transmitter (803) of electric controller (801), electric controller (801) are supplied power by corresponding small-size lithium cell (804).
3. A sampling device for geotechnical engineering investigation according to claim 2, wherein: the electric controller (801) adopts a STEM32F10x main control chip, and the signal transmitter (803) is a Bluetooth module or a wifi module and is connected to the STEM32F10x main control chip.
4. A sampling device for geotechnical engineering investigation according to claim 2, wherein: the side wall of the fixed groove (9) is in a cylindrical shape, the outer diameter of the guide pipe (6) is smaller than that of the fixed groove (9), and a handle (10) for drawing the fixed groove (9) is fixedly connected to the fixed groove (9).
5. A sampling device for geotechnical engineering investigation according to claim 1, wherein: the spherical grinding balls (503) are made of high-wear-resistance cast iron, the metal damping particles (502) are spherical particles made of high-wear-resistance cast iron, and the particle size of the spherical grinding balls (503) is more than three times that of the metal damping particles (502).
6. A method of using a sampling device for geotechnical engineering investigation according to claim 2, wherein: comprises the following steps:
s1, starting a corresponding driving mechanism to drive the drill rod (2) to drive the drill bit (3) to rotate so as to sample rock, and gradually extending a cylindrical rock sample (7) into the sample accommodating tube (4) through the sample inlet hole (301);
s2, pushing the pushing plate (501) gradually by the top of the cylindrical rock sample (7), extruding a plurality of metal damping particles (502) gradually by the pushing plate (501), and lifting the extrusion force of the metal damping particles (502) gradually so as to form sufficient thrust for the spherical grinding ball (503), so that the outer end part of the spherical grinding ball (503) breaks through the elasticity of the reed (11) and then stretches out and is fixedly propped against the bottom side of the cylindrical rock sample (7), the bottom side of the cylindrical rock sample (7) forms a section after being stressed, and the truncated cylindrical rock sample (7) is fixed between the pushing plate (501) and the outer end part of the spherical grinding ball (503);
s3, stopping the driving mechanism, taking out the drill rod (2) and the sampling tube (1), detaching the sampling tube (1) from the drill rod (2), pouring out and collecting the metal damping particles (502), and finally turning down the upper end part of the sampling tube (1), so that the cylindrical rock sample (7) and the push plate (501) can be taken out;
s4, collecting and processing the cylindrical rock sample (7), and cleaning and storing the drill rod (2) and the sampling tube (1) for the next sampling.
7. The method of using a sampling device for geotechnical engineering investigation according to claim 6, wherein: in the step S2, a vibration signal is acquired in real time through a vibration sensor (802), the vibration signal is transmitted to the electric controller (801), and when the pushing plate (501) pushes the metal damping particles (502), the friction energy consumption effect among the metal damping particles (502) is gradually improved, so that the vibration reduction effect is gradually improved; therefore, when the vibration signal acquired by the vibration sensor (802) is gradually reduced, the cylindrical rock sample (7) is judged to start pushing the push plate (501), and the signal is sent to the corresponding signal receiving end through the signal transmitter (803).
8. The method of using a sampling device for geotechnical engineering investigation according to claim 7, wherein: after the cylindrical rock sample (7) forms a section, the cylindrical rock sample (7) is fixed between the pushing plate (501) and the outer end part of the spherical grinding ball (503), so that the cylindrical rock sample (7) and a rock layer form a partition, and at the moment, the vibration quantity is further reduced and maintained; thus, when the vibration signal acquired by the vibration sensor (802) decreases to a minimum value, and at t 1 When the duration is kept within the minimum range, the cylindrical rock sample (7) is judged to be successfully cut off, and a signal is sent to a corresponding signal receiving end through a signal transmitter (803).
9. The method of using a sampling device for geotechnical engineering investigation according to claim 8, wherein: the signal receiving end is one of a mobile phone or a computer.
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| CN202311571333.5A CN117268842A (en) | 2023-11-23 | 2023-11-23 | Sampling device for geotechnical engineering investigation and application method thereof |
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