CN111947973B

CN111947973B - Sampling device for geotechnical engineering drilling investigation and sampling method thereof

Info

Publication number: CN111947973B
Application number: CN202010802889.0A
Authority: CN
Inventors: 李森
Original assignee: China Chemical Mingda Fujian Geological Survey Co Ltd
Current assignee: China Chemical Mingda Fujian Geological Survey Co Ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2022-04-19
Anticipated expiration: 2040-08-11
Also published as: CN111947973A

Abstract

The utility model relates to a sampling device and a sampling method thereof for geotechnical engineering drilling investigation, which relate to the technical field of sampling equipment and solve the problem of low soil layer test accuracy, and comprises a body, wherein the body comprises a base, a top seat and a support column, an installation column is arranged between the top seat and the base in a sliding manner, one side of the installation column is provided with a cylinder, the cylinder is provided with a touch plate, the top seat is provided with an air pump, the installation column is provided with a connecting rod, the installation column is provided with a connecting hole, the connecting rod slides in the connecting hole, the installation column is provided with a closed groove, the closed groove is provided with a closed column in a sliding manner, and the closed column is provided with a through hole; the base is provided with the drive plate, and the connecting rod is provided with half a section of thick bamboo of taking a sample, and half a section of thick bamboo of taking a sample is provided with the backup pad, and the spout has been seted up to half a section of thick bamboo of taking a sample, and the spout slides and has sealed half a section of thick bamboo, and half a section of thick bamboo swivelling joint of taking a sample has the pivot, and the pivot is fixed with drive gear, seals half a section of thick bamboo and has seted up the tooth's socket, and the pivot is fixed with rolling gear, and the erection column is provided with the rack. The method has the effect of improving the accuracy of soil layer tests.

Description

Sampling device for geotechnical engineering drilling investigation and sampling method thereof

Technical Field

The application relates to the technical field of sampling equipment, in particular to a sampling device for geotechnical engineering drilling investigation and a sampling method thereof.

Background

Drilling or exploration is a mechanical engineering technique that utilizes deep drilling, by taking the actual condition of the section of the formation, to capture a physical sample for providing an experiment to obtain relevant data information, etc., drilling is generally performed by a drilling machine.

At present, chinese utility model patent with publication number CN209670910U discloses a drilling rig, which comprises a drilling frame, a supporting platform, a drilling motor and a drill rod. The drill rig is vertically erected on the ground, the supporting platform is connected with the drill rig in a vertical sliding mode through the lifting guide device, the drilling motor is fixed to the supporting platform, the drill rod is vertically arranged below the supporting platform, and the drill rod is connected with the drilling motor and driven to rotate through the drilling motor. When the drilling machine is used, the drilling machine drives the drill rod to drill into the underground to form the sampling hole, the drill rod is of a hollow structure, a soil layer sample is contained in the drill rod in the drilling process, the drill rod is taken out after drilling is completed, and the soil layer sample in the drill rod is taken out to be tested.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the in-process of soil layer sample is collected to the drilling rod, and there is great frictional force in the inner wall of soil and drilling rod for soil receives extrusion from top to bottom when getting into the drilling rod inside, and the soil layer of the different degree of depth probably appears mixing in extrusion process, influences the accuracy of test result.

Disclosure of Invention

In order to improve the accuracy of soil layer test, the application provides a sampling device for geotechnical engineering drilling investigation and a sampling method thereof.

The application provides a sampling device for geotechnical engineering drilling investigation and a sampling method thereof.

First aspect, the application provides a sampling device for geotechnical engineering probing reconnaissance, adopts following technical scheme:

a sampling device for geotechnical engineering drilling investigation comprises a body of the sampling device arranged in a sampling hole, the body comprises a base, a top seat and a supporting column fixed between the base and the top seat, a mounting column is connected between the top seat and the base in a sliding way, the air cylinders are uniformly arranged on one side of the mounting column at intervals from top to bottom, the side of the air cylinder, which is far away from the mounting column, is provided with a conflict plate for conflicting with the hole wall of the sampling hole, the top of the top seat is provided with an air pump for providing an air source for the air cylinder, one side of the mounting column opposite to the air cylinder is provided with a connecting rod, the connecting rod is vertical to the mounting column and is arranged in a staggered way with the cylinder, the mounting column is provided with a connecting hole, the connecting rod is connected with the connecting hole in a sliding way, the mounting column is provided with a closed groove communicated with the connecting hole, the sealing groove is connected with a sealing column in an up-and-down sliding manner, and the sealing column is provided with a through hole for the connecting rod to pass through;

the utility model discloses a soil sample collection device, including base, connecting rod, erection column, sampling half bobbin, pivot top and bottom, the base top is provided with and is used for driving the gliding drive plate that seals the post rebound, the connecting rod is kept away from erection column one side and is provided with half a section of thick bamboo of sample, half bobbin bottom of sample is provided with the backup pad that is used for bearing the soil sample, half inside spout of seting up two and the coaxial setting of half a section of thick bamboo of sample, the spout slides respectively has half a section of thick bamboo of sealing, half a section of thick bamboo swivelling joint of sample has the pivot, the pivot is located between two half a section of thick bamboos of sealing and the periphery side is fixed with a plurality of drive gear, half a section of thick bamboo of sealing is close to pivot one side and has seted up a plurality of tooth's socket that meshes with drive gear mutually, pivot top and bottom fixedly connected with rotating gear respectively, erection column top and bottom are provided with the rack that can mesh with rotating gear mutually respectively.

By adopting the technical scheme, when in use, the body is firstly placed into the sampling hole, and then the air pump is started, so that the air pump provides power for the air cylinder and pushes the abutting plate to abut against the wall of the sampling hole; when the conflict plate is in conflict with the hole wall of the sampling hole, the produced counterforce pushes the mounting column to slide towards the opposite direction until the sampling half cylinder is inserted into the hole wall of the sampling hole, which is beneficial to ensuring that the force borne by the mounting column is in a relatively uniform state, and in the process of inserting the sampling half cylinder into the hole wall of the sampling hole, the body does not shake greatly, so that the body does not need to be fixed when being put into the sampling hole; after the sampling half cylinder is inserted into the wall of the sampling hole, the driving plate drives the closed column to slide upwards until the connecting rod passes through the through hole, and at the moment, the connecting rod and the mounting column are in a relative sliding state, so that the mounting column can continuously slide; when the mounting column continues to slide, the rack is meshed with the rotating gear to drive the rotating shaft to rotate, so that the transmission gear drives the closed half cylinder to slide in the opposite direction until the closed half cylinder slides out of the sampling half cylinder and closes the sampling half cylinder, soil which is not extruded in the drilling process is favorably brought into the sampling half cylinder, and finally, the air pump is closed to take out the body, so that a soil sample can be collected; whole process is simple, convenient, accomplishes whole sample process through the same power supply to when the thief hole is darker, can rotate through driving pivot top and bottom both ends simultaneously, make and seal half a section of thick bamboo of the sealed sample that can be comparatively light, be favorable to taking out the drilling in-process and not receive extruded soil sample, improve the accuracy of soil layer test.

Preferably, the two sliding grooves are respectively communicated with and provided with a limiting groove, and one side, away from the rotating shaft, of each closed half cylinder is provided with a limiting block which is abutted against the groove wall of the limiting groove when the two closed half cylinders are crossed.

By adopting the technical scheme, the limiting block slides in the limiting groove when in use until the parts of the two closed half cylinders sliding out of the sampling half cylinders are mutually staggered, and the limiting block abuts against the wall of the limiting groove, so that the blocking of the closed half cylinders from separating from the sliding groove is facilitated.

Preferably, the two closed half cylinders are respectively provided with drag reduction teeth at uniform intervals from top to bottom.

By adopting the technical scheme, the two closed half cylinders are respectively provided with the anti-drag teeth, so that the resistance from soil when the two closed half cylinders slide is favorably reduced.

Preferably, the top of the base is provided with a mounting groove, the driving plate is mounted in the mounting groove, the top of the driving plate is obliquely provided with a driving surface, and the height of the driving surface close to the cylinder is lower than that of the driving surface far away from the cylinder.

Through adopting above-mentioned technical scheme, the sealing column bottom slides in the driving face during the use, is favorable to promoting the sealing column and upwards slides in the erection column.

Preferably, the periphery of the connecting rod is symmetrically provided with limiting grooves, the hole walls of the connecting holes are symmetrically provided with limiting blocks, and the limiting blocks are connected to the limiting grooves in a sliding mode.

Through adopting above-mentioned technical scheme, the spacing piece slides in the spacing groove during use, is favorable to hindering the connecting rod to break away from the connecting hole.

Preferably, the touch panel is of an arc-shaped panel structure, and the arc-shaped concave surface of the touch panel faces one side of the mounting column.

Through adopting above-mentioned technical scheme, the arc of conflict board is concave towards the erection column inwards, is favorable to increasing the area of contact of conflict board and thief hole pore wall.

Preferably, the rack slides in footstock and base, the cylinder one side is kept away from to erection column top and bottom has seted up the inserting groove, the rack is pegged graft in the inserting groove.

Through adopting above-mentioned technical scheme, the rack is pegged graft in the inserting groove, does not influence the erection column on the one hand and promotes the rack and slide, and on the other hand the rack can be comparatively easy breaks away from the erection column.

Preferably, the contact plate is provided with a plurality of plug columns at even intervals from top to bottom on the side away from the mounting column, and a plurality of stabilizing strips are arranged on the periphery of each plug column.

Through adopting above-mentioned technical scheme, in the soil of plug column, firm strip insertion sampling hole pore wall week side during the use, be favorable to increasing the degree of difficulty that the plug column breaks away from soil, conveniently drive the erection column and move towards the conflict board direction.

Preferably, the stabilizing strip is provided with a stabilizing groove, a stabilizing shaft is arranged in the stabilizing groove, the stabilizing strip is rotatably connected to the stabilizing shaft, the stabilizing shaft sleeve is provided with a torsion spring, one end of the torsion spring abuts against the wall of the stabilizing groove, and the other end of the torsion spring abuts against one side of the stabilizing strip, which is close to the mounting column.

Through adopting above-mentioned technical scheme, torsional spring elasticity release during the use drives the firm strip and towards keeping away from the upset of erection column direction for when the plug column breaks away from the soil of sampling hole pore wall week side, firm strip can increase the resistance that meets when the plug column breaks away from.

In a second aspect, the present application provides a sampling method of a sampling device for geotechnical engineering drilling investigation, which adopts the following technical scheme:

s1: firstly, placing the body into a sampling hole;

s2: starting an air pump to provide an air source for the air cylinder, pushing the abutting plate to abut against the wall of the sampling hole by the air cylinder, then pushing the mounting column to slide by a counterforce until the sampling half cylinder is inserted into the wall of the sampling hole, driving the closed column to slide upwards by the driving plate at the same time until the connecting rod penetrates through the through hole, so that the rack is meshed with the rotating gear to drive the closed half cylinder to slide and close the sampling half cylinder;

s3: and closing the air pump, and taking out the body to collect the soil sample in the sampling half cylinder.

By adopting the technical scheme, when the sampling device is used, the body is placed in the sampling hole, the body does not need to be fixed, and the air pump is started, so that the air cylinder pushes the touch plate to move towards the direction far away from the mounting column; then, the mounting column is pushed to move towards the direction far away from the conflict plate under the action of a reaction force until the sampling half cylinder is inserted into the soil on the peripheral side of the hole wall of the sampling hole, and at the moment, the through hole is aligned with the connecting rod, so that the connecting rod slides on the mounting column, and the mounting column can continuously slide; in the sliding process, the rack drives the rotating shaft to rotate, so that the two closed half cylinders slide out of the sampling half cylinder and are matched with the sampling half cylinder for sampling; and then the body is taken out to collect the soil sample, thereby being beneficial to improving the accuracy of soil layer test.

In summary, the present application includes at least one of the following benefits:

1. when the sampling device is used, the body is firstly placed into the sampling hole, then the air pump is started to enable the air cylinder to drive the abutting plate to abut against the wall of the sampling hole, and then the mounting column is pushed to move towards the opposite direction through the counterforce until the sampling half cylinder is inserted into the wall of the sampling hole, so that the state of the body is favorably kept, and the body does not need to be fixed after being placed into the sampling hole; then, the driving plate drives the closed column to move upwards until the connecting rod penetrates through the through hole, and then the rack is meshed with the rotating gear to drive the rotating shaft to rotate, so that the closed half cylinder is used for closing the sampling half cylinder, soil sample storage is realized, and finally the air pump is closed to take out the body; the whole process is simple and convenient, the sampling can be realized by only one power source, and when the sampling hole is deep, the top and the bottom of the rotating shaft can be driven to rotate simultaneously, so that the closed half cylinder can easily close the sampling half cylinder, the soil sample which is not extruded in the drilling process can be taken out, and the accuracy of soil layer testing is improved;

2. when the cylinder drives the touch panel and moves towards the erection column, firm strip is pegged graft in soil, and the erection column moves towards conflict board direction this moment, breaks away from the thief hole pore wall until driving half a section of thick bamboo of sample, then the cylinder just can drive the conflict board and break away from the thief hole pore wall, is favorable to reducing the resistance that the body received in the process of taking out.

Drawings

FIG. 1 is a schematic diagram of a state before sampling of the body of the embodiment of the present application;

FIG. 2 is a schematic diagram of the sampling state of the body according to the embodiment of the present application;

FIG. 3 is a schematic internal cross-sectional view of a body of an embodiment of the present application;

FIG. 4 is a schematic view of a connection structure of a high-intensity touch panel according to an embodiment of the present disclosure;

FIG. 5 is an enlarged schematic view of section A of FIG. 4;

FIG. 6 is a schematic diagram illustrating a state of a sampling space formed according to an embodiment of the present application;

FIG. 7 is a schematic view of the interior cross-section of a highlighted sampling half-cylinder of an embodiment of the present application;

FIG. 8 is a schematic view showing the internal structure of the sampling half-cylinder according to the embodiment of the present application.

Reference numerals: 1. a body; 2. a base; 3. a top seat; 4. a support pillar; 5. mounting a column; 6. closing the column; 7. a cylinder; 8. a piston rod; 9. a touch plate; 10. an air pump; 11. a connecting rod; 12. connecting holes; 13. closing the groove; 14. perforating holes; 15. a drive plate; 16. a sampling half cylinder; 17. a support plate; 18. a chute; 19. sealing the half cylinder; 20. a rotating shaft; 21. a transmission gear; 22. a tooth socket; 23. a rotating gear; 24. a rack; 25. a limiting groove; 26. a limiting block; 27. drag reduction teeth; 28. mounting grooves; 29. a drive face; 30. a limiting groove; 31. a limiting block; 32. inserting grooves; 33. stabilizing the strips; 34. inserting the column; 35. a stabilizing groove; 36. stabilizing the shaft; 37. a torsion spring; 38. the space is sampled.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

Referring to fig. 1, a sampling device for geotechnical engineering drilling investigation disclosed for the embodiment of the application comprises a body 1 of the sampling device arranged in a sampling hole, wherein the sampling hole is drilled through a drilling machine.

Referring to fig. 1, the body 1 includes a base 2, a top seat 3 and a supporting column 4, and the supporting column 4 is symmetrically fixed between the base 2 and the top seat 3 to realize the connection between the top seat 3 and the base 2. The fixed plate is fixedly connected to two sides of the bottom of the top seat 3 respectively, and the body 1 is placed into the sampling hole during use, so that the bottom of the base 2 is abutted to the bottom of the sampling hole, and the bottom of the fixed plate is abutted to the ground on the periphery of the top of the sampling hole.

Referring to fig. 2, a mounting column 5 is arranged between the top base 3 and the base 2, the top base 3 and the base 2 are rectangular plate-shaped structures, moving grooves are respectively formed in opposite sides of the top base 3 and the base 2 along the length direction, and the mounting column 5 slides in the moving grooves. The shifting chute intercommunication has been seted up and has been blocked the groove, and 5 tops of erection column and bottom are provided with respectively and block the piece, block piece sliding connection in and block the groove, are favorable to hindering erection column 5 to break away from the shifting chute.

Referring to fig. 2 and 3, the air cylinders 7 are uniformly arranged on one side of the mounting column 5 at intervals from top to bottom, and the air cylinders 7 are provided with brackets, so that the air cylinders 7 can be fixed on the mounting column 5. The top of the footstock 3 is provided with an air pump 10, the air pump 10 is fixed on the footstock 3 through a bolt, and a connecting pipe is connected between the air pump 10 and the air cylinder 7. The cylinder 7 is kept away from mounting column 5 one side sliding connection and is had piston rod 8, starts air pump 10 during the use and produces the air supply, and cylinder 7 is given in the transmission of rethread connecting pipe for cylinder 7 can drive piston rod 8 towards being close to mounting column 5 or keeping away from 5 directions of mounting column and slide.

Referring to fig. 3 and 4, one side of the piston rod 8, which is far away from the mounting column 5, is fixedly connected with a touch plate 9 through a screw, and the touch plate 9 is of an arc-shaped long plate structure and the arc-shaped concave surface of the touch plate 9 faces the mounting column 5.

Referring to fig. 3 and 5, a plurality of inserting columns 34 are uniformly fixed on one side of the abutting plate 9 away from the mounting column 5 at intervals from top to bottom, and a plurality of stabilizing grooves 35 are uniformly arranged on the outer peripheral side of each inserting column 34 at intervals along the circumferential direction. The stabilizing groove 35 is fixedly connected with a stabilizing shaft 36, and the stabilizing shaft 36 is perpendicular to the inserting column 34. The stabilizing shaft 36 is rotatably connected with the stabilizing strip 33, so that the stabilizing strip 33 is hinged with the inserting column 34, the torsion spring 37 is sleeved on the outer peripheral side of the stabilizing shaft 36, one end of the torsion spring 37 abuts against the groove wall of the stabilizing groove 35, the other end of the torsion spring 37 abuts against the stabilizing strip 33, and when the elasticity of the torsion spring 37 is released, the stabilizing strip 33 is pushed to turn towards the direction away from the mounting column 5.

Referring to fig. 2 and 3, when in use, the air pump 10 is started to generate an air source, and then the forward stroke of the air cylinder 7 is started, so that the air cylinder 7 drives the piston rod 8 to move towards the direction away from the mounting column 5, at this time, the insertion column 34 is firstly inserted into the sampling hole wall, and then the piston rod 8 continues to slide towards the direction away from the mounting column 5, so that the mounting column 5 slides towards the direction away from the touch plate 9 under the action of a reaction force.

Referring to fig. 3, a plurality of connecting holes 12 are formed in one side of the mounting column 5, which is far away from the cylinder 7, at even intervals from top to bottom, and the connecting holes 12 penetrate through the mounting column 5 and are arranged in a staggered manner with the cylinder 7. The connecting hole 12 is connected with a connecting rod 11 in a sliding mode, and the connecting rod 11 is perpendicular to the mounting column 5. Limiting grooves 30 have been seted up respectively to connecting rod 11 top and bottom, and connecting hole 12 top and bottom pore wall fixedly connected with stopper 31 respectively, stopper 31 sliding connection in limiting grooves 30 are favorable to hindering connecting rod 11 to break away from connecting hole 12. To facilitate the installation of the connecting rod 11, the mounting post 5 is of a two-half construction.

Referring to fig. 3, a sealing groove 13 is formed in the mounting post 5 along the vertical direction, and the sealing groove 13 is communicated with the connecting hole 12 and is connected with the sealing post 6 in a vertically sliding manner. Connecting rod 11 is kept away from erection column 5 one side and is provided with half a section of thick bamboo 16 of taking a sample, and half a section of thick bamboo 16 of taking a sample becomes arc platelike structure, and the arc convex surface side of half a section of thick bamboo 16 of taking a sample is towards erection column 5, and half a 16 bottom fixedly connected with backup pad 17 of taking a sample for bear soil.

Referring to fig. 3, in an initial state, the connecting rod 11 abuts against the closed column 6, and after the inserting column 34 is inserted into the hole wall of the sampling hole, the mounting column 5 moves towards the side far away from the abutting plate 9 under the action of a reaction force until the sampling half cylinder 16 is inserted into the soil around the hole wall of the sampling hole; during the insertion of the sampling half cylinder 16 into the wall of the sampling bore, the plug-in stud 34 likewise continues to be inserted into the wall of the sampling bore under the action of force until the stabilizing strip 33 is inserted into the soil on the circumferential side of the wall of the sampling bore.

Referring to fig. 3, the closed column 6 is provided with a plurality of through holes 14 at even intervals from top to bottom, and after the half section of thick bamboo 16 of sample inserted the inside sampling hole pore wall, the through holes 14 were aligned with the connecting rod 11, and the connecting rod 11 slides in connecting hole 12 this moment for the erection column 5 can continue to move towards the half section of thick bamboo 16 direction of sample under the effect of reaction force.

Referring to fig. 3, the base 2 is provided with a mounting groove 28, the mounting groove 28 is located below the moving groove and is communicated with the moving groove, and the sealing post 6 is slidably connected to the mounting groove 28. The driving plate 15 is fixedly connected in the mounting groove 28, the top of the driving plate 15 is obliquely provided with a driving surface 29, and the vertical height of one side, close to the air cylinder 7, of the driving surface 29 is higher than that of one side, far away from the air cylinder 7.

Referring to fig. 3, when the mounting post 5 slides between the top base 3 and the base 2, the bottom of the sealing post 6 slides on the driving surface 29, which is beneficial to pushing the sealing post 6 to slide upwards until the sampling half-cylinder 16 is inserted into the hole wall of the sampling hole, and the through hole 14 is aligned with the connecting rod 11.

Referring to fig. 6 and 7, two sliding grooves 18 extending along an arc-shaped track are formed in the sampling half cylinder 16, and the two sliding grooves 18 are respectively arranged coaxially with the sampling half cylinder 16. The sliding groove 18 is connected with a closed half cylinder 19 in a sliding mode, and one side, far away from the mounting column 5, of the sampling half cylinder 16 is provided with two inlets and outlets which are used for enabling the two closed half cylinders 19 to slide out of the sampling half cylinder 16 respectively. The two closed half-cylinders 19 can slide out of one side of the sampling half-cylinder 16 and are provided with a plurality of drag reducing teeth 27, which are beneficial to reducing the resistance received by the soil.

Referring to fig. 6 and 7, the sampling half cylinders 16 are rotatably connected with a rotating shaft 20, the rotating shaft 20 is located between the two sampling half cylinders 16, and the central axes of the rotating shaft 20, the two closed half cylinders 19 and the sampling half cylinders 16 are located on the same vertical plane. A plurality of transmission gears 21 are fixed on the outer periphery of the rotating shaft 20 at intervals up and down, tooth grooves 22 are respectively formed on opposite sides of the closed half cylinder 19, and the transmission gears 21 are meshed with the tooth grooves 22.

Referring to fig. 7 and 8, when the rotating shaft 20 rotates, the transmission gear 21 drives the two half closed cylinders 19 to move along opposite circumferential tracks through the tooth sockets 22 until the two half closed cylinders 19 slide out of the half sampling cylinder 16 to form a mutual laminating area, and at this time, the two half closed cylinders 19 and the half sampling cylinder 16 surround to form a sampling space 38, which is beneficial to accommodating soil slightly far away from the hole wall part of the sampling hole into the sampling space 38. In the initial state, the two half closed cylinders 19 protrude from the sampling half cylinder 16 at one side, so that the transmission gear 21 and the tooth slot 22 are still engaged when the sampling space 38 is formed.

Referring to fig. 7 and 8, the opposite sides of the two closed half cylinders 19 are fixedly connected with limiting blocks 26 respectively, the two sliding grooves 18 are communicated with limiting grooves 25 respectively, and the limiting blocks 26 are slidably connected to the limiting grooves 25. When the two half closed cylinders 19 and the half sampling cylinder 16 enclose the sampling space 38, the limiting block 26 abuts against the wall of the limiting groove 25, which is beneficial to preventing the half closed cylinder 19 from separating from the chute 18.

Referring to fig. 7 and 8, the rotating gears 23 are respectively and fixedly connected to the top and the bottom of the outer periphery of the rotating shaft 20, so that when the sampling hole is deep, power can be provided through the two ends of the rotating shaft 20, and the closed half cylinder 19 can easily slide in the sliding groove 18.

Referring to fig. 3, racks 24 are slidably connected to opposite sides of the top base 3 and the bottom base 2, respectively.

Referring to fig. 6, the top and the bottom of the side of the mounting post 5 away from the contact plate 9 are respectively provided with a plug-in groove 32, and the rack 24 is plugged in the plug-in groove 32. In the initial state, the rack 24 is not in contact with the rotating gear 23.

Referring to fig. 3, when the through hole 14 and the connecting rod 11 are aligned with each other, the rack 24 is preliminarily engaged with the rotating gear 23.

Referring to fig. 6, at this time, the mounting post 5 continues to move in the direction away from the contact plate 9, so as to drive the rack 24 to move, so that the rack 24 drives the rotating gear 23 to rotate, which is beneficial to driving the rotating shaft 20 to rotate under the action of the same power source, thereby realizing the function of sealing the sampling half cylinder 16.

Referring to fig. 6, in order to facilitate installation, the sampling half cylinder 16 has a two-half structure, and the two half sampling half cylinders 16 are fixed by screws after installation.

Referring to fig. 3, when sampling space 38 contains sampling hole pore wall periphery side soil, start the reverse stroke of cylinder 7 for piston rod 8 slides towards erection column 5 one side, and the firm strip 3 joint is in soil this moment, makes erection column 5 move towards touch panel 9 direction.

Referring to fig. 3, during movement, rack 24 is separated from mounting post 5 to facilitate maintaining the state of sampling space 38. Then, when the stopper 31 abuts against the wall of the stopper groove 30, the connecting rod 11 drives the sampling half cylinder 16 to separate from the wall of the sampling hole, and the two racks 24 slide on the top base 3 and the base 2 during the separation process. When the mounting column 5 moves to contact with the wall of the moving groove, the plugging column 34 is driven by the piston rod 8 to separate from the wall of the sampling hole, which is beneficial to reducing the resistance when the body 1 is taken out.

The implementation principle of the embodiment of the application is as follows:

when in use, the body 1 is put into the sampling hole without fixing the base 2 and the top seat 3. Then start air pump 10, start the forward stroke of cylinder 7 simultaneously for piston rod 8 moves towards keeping away from erection column 5 direction, pegs graft in the thief hole pore wall until peg graft post 34, and erection column 5 moves towards keeping away from touch panel 9 direction under the effect of reaction force after that, makes half a section of thick bamboo 16 of taking a sample can insert the thief hole pore wall. During the insertion process, the insertion column 34 and the stabilizing strip 33 are simultaneously inserted into the hole wall of the sampling hole under the action of force. Drive plate 15 drive closure post 6 upward movement among the installation post 5 slip process, until after half a section of thick bamboo 16 of taking a sample inserts the sampling hole pore wall, wear to establish hole 14 and connecting rod 11 and aim at, connecting rod 11 slides relatively in installation post 5 this moment, is favorable to the installation post 5 to continue to move towards keeping away from touch panel 9 direction. In the process of continuous movement, the rack 24 is meshed with the rotating gear 23 to drive the closed half cylinder 19 to close the sampling half cylinder 16, so that a sampling space 38 is formed, and soil which is not extruded in the drilling process on the peripheral side of the hole wall of the sampling hole is contained in the sampling space 38.

After sampling, the reverse stroke of the cylinder 7 is activated, causing the piston rod 8 to retract into the cylinder 7. The piston contracts and drives the inserting column 34 and the sampling half-cylinder 16 to move, so that the inserting column 34 and the sampling half-cylinder 16 are separated from the hole wall of the sampling hole, and resistance encountered when the body 1 is taken out is reduced. Finally, the body 1 is taken out, and the sampling space 38 is opened again to obtain an uncompressed soil sample, which is favorable for improving the testing accuracy of the soil layer.

The application also discloses a sampling method of the sampling device for geotechnical engineering drilling investigation, which comprises the following steps:

the method comprises the following steps: firstly, putting the body 1 into a sampling hole;

step two: start air pump 10 and provide the air supply for cylinder 7, cylinder 7 promotes to support touch panel 9 and contradicts in the thief hole pore wall, promotes the erection column 5 through the reaction force and slides after that until the half 16 of a sample insert the thief hole pore wall. At the moment, the driving plate 15 drives the closed column 6 to slide upwards until the connecting rod 11 passes through the through hole 14, so that the rack 24 is meshed with the rotating gear 23 to drive the closed half cylinder 19 to slide and close the sampling half cylinder 16;

step three: the air pump 10 is closed, and the soil sample in the sampling half-cylinder 16 can be collected after the body 1 is taken out.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a sampling device is used in geotechnical engineering probing reconnaissance which characterized in that: comprises a body (1) of a sampling device placed in a sampling hole, wherein the body (1) comprises a base (2), a top seat (3) and a supporting column (4) fixed between the base (2) and the top seat (3), an installing column (5) is connected between the top seat (3) and the base (2) in a sliding manner, air cylinders (7) are uniformly arranged on one side of the installing column (5) at intervals from top to bottom, a conflict plate (9) for conflicting with the wall of the sampling hole is arranged on one side, away from the installing column (5), of each air cylinder (7), an air pump (10) for providing an air source for each air cylinder (7) is arranged at the top of the top seat (3), a connecting rod (11) is arranged on one side, opposite to each air cylinder (7), of each installing column (5), the connecting rod (11) is perpendicular to the installing column (5) and is staggered with the air cylinders (7), a connecting hole (12) is formed in the installing column (5), the connecting rod (11) is connected with the connecting hole (12) in a sliding manner, the mounting column (5) is provided with a closed groove (13) communicated with the connecting hole (12), the closed groove (13) is connected with a closed column (6) in an up-and-down sliding manner, and the closed column (6) is provided with a through hole (14) for the connecting rod (11) to pass through;

the top of the base (2) is provided with a driving plate (15) used for driving the sealing column (6) to slide upwards, one side, far away from the mounting column (5), of the connecting rod (11) is provided with a sampling half cylinder (16), the bottom of the sampling half cylinder (16) is provided with a supporting plate (17) used for bearing a soil sample, two sliding grooves (18) which are coaxial with the sampling half cylinder (16) are formed in the sampling half cylinder (16), the sliding grooves (18) are respectively provided with a sealing half cylinder (19) in a sliding manner, the sampling half cylinder (16) is rotatably connected with a rotating shaft (20), the rotating shaft (20) is positioned between the two sealing half cylinders (19), a plurality of transmission gears (21) are fixed on the peripheral side, close to the rotating shaft (20), of the sealing half cylinder (19) is provided with a plurality of tooth grooves (22) meshed with the transmission gears (21), and the top and the bottom of the rotating shaft (20) are respectively and fixedly connected with a rotating gear (23), the top and the bottom of the mounting column (5) are respectively provided with a rack (24) which can be meshed with the rotating gear (23).

2. The sampling device for geotechnical engineering drilling investigation of claim 1, wherein: two the spout (18) communicate respectively and have seted up restriction groove (25), closed half section of thick bamboo (19) keep away from pivot (20) one side be provided with when two closed half section of thick bamboo (19) intersect the restriction piece (26) of staggering with restriction groove (25) cell wall butt.

3. The sampling device for geotechnical engineering drilling investigation of claim 2, wherein: the two closed half cylinders (19) are respectively provided with drag reduction teeth (27) at uniform intervals from top to bottom.

4. The sampling device for geotechnical engineering drilling investigation of claim 1, wherein: the top of the base (2) is provided with a mounting groove (28), the driving plate (15) is mounted in the mounting groove (28), the top of the driving plate (15) is obliquely provided with a driving surface (29), and the height of one side, close to the cylinder (7), of the driving surface (29) is lower than that of one side, far away from the cylinder (7).

5. The sampling device for geotechnical engineering drilling investigation of claim 1, wherein: limiting grooves (30) are symmetrically formed in the outer peripheral side of the connecting rod (11), limiting blocks (31) are symmetrically arranged on the hole wall of the connecting hole (12), and the limiting blocks (31) are connected to the limiting grooves (30) in a sliding mode.

6. The sampling device for geotechnical engineering drilling investigation of claim 1, wherein: the rack (24) slides on the top seat (3) and the base (2), one side of the top and the bottom of the mounting column (5) far away from the cylinder (7) is provided with an insertion groove (32), and the rack (24) is inserted in the insertion groove (32).

7. The sampling device for geotechnical engineering drilling investigation of claim 6, wherein: the touch panel (9) is of an arc-shaped panel structure, and the arc-shaped concave surface of the touch panel (9) faces one side of the mounting column (5).

8. The sampling device for geotechnical engineering drilling investigation of claim 7, wherein: a plurality of plug-in posts (34) are uniformly arranged on one side, far away from the mounting post (5), of the contact plate (9) at intervals from top to bottom, and a plurality of stabilizing strips (33) are arranged on the outer peripheral side of each plug-in post (34).

9. The sampling device for geotechnical engineering drilling investigation of claim 8, wherein: the fixing device is characterized in that a fixing groove (35) is formed in the fixing strip (33), a fixing shaft (36) is arranged in the fixing groove (35), the fixing strip (33) is connected to the fixing shaft (36) in a rotating mode, a torsion spring (37) is sleeved on the fixing shaft (36), one end of the torsion spring (37) is abutted to the wall of the fixing groove (35), and the other end of the torsion spring (37) is abutted to one side, close to the mounting column (5), of the fixing strip (33).

10. A sampling method of a sampling device for geotechnical drilling investigation according to any one of claims 1-9, which comprises the following steps:

s1: firstly, putting the body (1) into a sampling hole;

s2: starting an air pump (10) to provide an air source for an air cylinder (7), pushing a touch plate (9) to abut against the wall of a sampling hole by the air cylinder (7), then pushing a mounting column (5) to slide by a reaction force until a sampling half cylinder (16) is inserted into the wall of the sampling hole, driving a closed column (6) to slide upwards by a driving plate (15) until a connecting rod (11) penetrates through a through hole (14), so that a rack (24) is meshed with a rotating gear (23) to drive the closed half cylinder (19) to slide, and closing the sampling half cylinder (16);

s3: and (3) closing the air pump (10), and taking out the body (1) to collect the soil sample in the sampling half cylinder (16).