A borehole coring system for geotechnical engineering exploration

Abstract

The present application relates to geotechnical engineering technical field, specifically for a kind of geotechnical engineering exploration drilling coring system.The linkage assembly is located at the inner end side of drilling assembly, wherein the soil taking assembly is uniformly located in the inner end side of drilling assembly, the drilling assembly includes component outer frame, drilling external rod, motor shaft, fixed disc, driving slot, counter block, receiving link, outward push frame, drilling soil layer cylinder and distance receiving slot, wherein the drilling external rod is movably connected to the end side of component outer frame, the motor shaft is located in the inner end side of drilling external rod, wherein the fixed disc is connected to the lower end of motor shaft by screw, the different positions of rock-soil are sampled by storing soil inner cylinder, which is beneficial to the sampling of different levels of rock-soil by workers, and since sampling is carried out when drilling soil layer cylinder is located in rock-soil, the mixing phenomenon between different levels of rock-soil can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, specifically to a core drilling system for geotechnical engineering exploration. Background Technology

[0002] The purpose of geotechnical engineering exploration is to investigate, study, and analyze construction sites using testing methods and techniques; to study the geological conditions for constructing various engineering structures and the impact of construction on the natural geological environment; to study the strength and stability of the foundation when the foundation, substructure, and superstructure work together; and to ensure that if the exploration work is inadequate, adverse engineering geological problems will be revealed, and even if the design and construction of the superstructure are of high quality, it will inevitably suffer damage. The geotechnical engineering exploration process includes the step of taking soil samples, and this process requires the use of drilling equipment.

[0003] Existing drilling equipment can directly drill holes in soil and rock. However, currently, soil samples are taken after the drilling equipment has drilled the hole and removed the soil sample. During this process, the soil hole may collapse, leading to the failure of soil sample collection. In addition, it is difficult to collect soil samples from different soil and rock layers using only a single soil hole. Furthermore, soil and rock from different layers may mix during the sampling process, resulting in inaccurate measurement results and affecting the staff's judgment of soil and rock layers. Summary of the Invention

[0004] The purpose of this invention is to provide a core drilling system for geotechnical engineering exploration to solve the problems mentioned above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a core drilling system for geotechnical engineering exploration, wherein the linkage component is located on one side of the inner end of the drilling component, and the soil sampling component is uniformly located on the middle side of the inner end of the drilling component. The drilling component includes an outer frame, an outer drilling rod, a motor shaft, a fixed disc, a drive groove, a counter-push block, a receiving block, an outward push frame, a drilled soil cylinder, and a pull-out inner groove. The outer drilling rod is movably connected to the middle side of one end of the outer frame. The motor shaft is located on the middle side of the inner end of the outer drilling rod. The fixed disc is connected to the lower end of the motor shaft by screws. The drive groove is opened on one side of the lower end of the fixed disc. The counter-push block is welded to one side of the lower end of the fixed disc. The receiving block is welded to the middle side of the lower end of the fixed disc. The outward push frame is welded to one side of the lower end of the receiving block. The drilled soil cylinder is welded to the outer side of the lower end of the outer drilling rod. The pull-out inner groove is opened on one side of the inner end of the drilled soil cylinder.

[0006] Preferably, the external drilling rod is arranged through one end of the outer frame of the assembly, wherein the driving slot is square, the counter-pushing block is located on one side of the outer end of the driving slot, the receiving connecting block is arranged through the middle of the external drilling rod, the outward pushing frame is located inside the drilling soil cylinder, wherein the outward pushing frame is arc-shaped, and a circular hole is uniformly opened through the middle of one end of the drilling soil cylinder.

[0007] Preferably, the lower end of the borehole soil cylinder is provided with a welded drill rod, wherein a drainage groove is opened on the inner side of the upper end of the drill rod, the drainage groove is conical, and a drainage groove is opened through one side of the lower end of the drill rod, the drainage groove is opened through the drainage groove, and a plugging cap is placed on one side of the inner end of the drainage groove. The plugging cap is connected to the drill rod by a snap-fit. A drill bit is placed at the lower end of the drill rod, and a connecting column is provided on the middle side of the upper end of the drill bit, wherein the connecting column is screwed to the drill rod. An integrally formed disassembly protrusion is provided on the outer side of the upper end of the drill bit.

[0008] Preferably, the linkage assembly includes a sealing baffle, a connecting hole, a distance-extending slide rod, a linkage support rod, an extension stop rod, upper and lower sliding grooves, and a movable slider. The connecting hole is uniformly formed through one end of the sealing baffle. The distance-extending slide rod is fixed to the upper end of the sealing baffle. The linkage support rod is welded to the upper side of one end of the distance-extending slide rod. The extension stop rod is fixed to one end of the linkage support rod. The upper and lower sliding grooves are formed in the middle of one end of the extension stop rod. One end of the movable slider is located on one side of the inner end of the upper and lower sliding grooves.

[0009] Preferably, the sealing baffle is located on one side of the inner end of the tension groove, wherein one end of the tension-increasing slide rod is located on one side of the inner end of the drilled outer rod, the tension-increasing slide rod and the sealing baffle are integrally formed, wherein one end of the linkage support rod is located at the lower end of the fixed disk, the linkage support rod and the extension stop rod are integrally formed, wherein the upper surface of the extension stop rod is in contact with the lower surface of the fixed disk.

[0010] Preferably, a limiting top block is welded to one end of the movable slider, and a reset spring plate connected by screws is provided on one side of the lower end of the movable slider. The other end of the reset spring plate is connected to the extension stop by screws. An extension support is welded to the lower side of one end of the limiting top block. A pressure rod is placed on the outside of the extension support. The pressure rod is arranged in an arc shape. The pressure rod is welded to the external rod of the drilling hole. An anti-detachment frame is provided on one side of the lower end of the pressure rod. An integrally formed guide plate is provided at one end of the anti-detachment frame. One end of the extension support is placed at the inner end of the anti-detachment frame.

[0011] Preferably, the soil sampling assembly includes a soil storage inner cylinder, a filter screen, a compression disc, a telescopic hollow tube, an air-proof baffle, a pneumatic conveying pipe, a sealing cap, and a placement inner groove. The filter screen is screwed to the lower side of one end of the soil storage inner cylinder. The compression disc is located on one side of the inner end of the soil storage inner cylinder. One end of the telescopic hollow tube is screwed to the middle side of one end of the compression disc, and one end of the telescopic hollow tube passes through the middle side of one end of the soil storage inner cylinder. One end of the air-proof baffle is welded to the lower side of one end of the compression disc, and one end of the air-proof baffle passes through the soil storage inner cylinder. The pneumatic conveying pipe is located on one side of the telescopic hollow tube and is screwed to the telescopic hollow tube. One end of the pneumatic conveying pipe passes through the external rod of the borehole. The sealing cap is located on one side of the inner end of the pneumatic conveying pipe. The placement inner groove is located inside one end of the soil storage inner cylinder.

[0012] Preferably, the number of sets of soil-storing inner cylinders is four, wherein the position of the soil-storing inner cylinder corresponds to the position of the circular hole, one end of the soil-storing inner cylinder has a through-hole, wherein the filter screen is located inside the through-hole, one end of the soil-storing inner cylinder is fitted with a connecting ring, and an integrally formed connecting rod is provided between two connecting rings. One of the connecting rings has an integrally formed protrusion on one side of its upper end, and a welded guide rod is provided on one side of the upper end of the protrusion. The guide rod is arranged through the middle of the outward pushing frame.

[0013] Preferably, a push-out spring is placed on one side of the inner end of the inner groove, and a movable outer plate is placed on the outer side of the inner end of the inner groove. A limiting collar is fitted on one side of the outer end of the movable outer plate, and the limiting collar is welded to the inner cylinder of the soil storage. A seamless guide ring is provided at one end of the movable outer plate, and an integrally formed soil cutting plate is provided at one end of the seamless guide ring. An integrally formed fitting inner ring is provided on one side of the other end of the seamless guide ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. With the design of this invention, the drill rod can be divided into three parts, of which the drill bit part, which is most susceptible to wear, can be disassembled and replaced, which helps to ensure the normal drilling operation of the drill rod. At the same time, the drill bit part can divert water that enters the soil cylinder of the borehole, which facilitates the sampling of soil and rock.

[0016] 2. With the design of this invention, the soil storage cylinder can be used to collect samples from different locations of the soil and rock, which is beneficial for workers to sample different layers of soil and rock. At the same time, since the sampling is carried out when the soil storage cylinder is inside the soil and rock, the phenomenon of mixing between different layers of soil and rock can be effectively avoided.

[0017] 3. By configuring the present invention, the sealing of the borehole soil layer cylinder can be ensured before sampling. Under the premise of ensuring the normal operation of drilling the borehole soil layer cylinder, the borehole soil layer cylinder can be interconnected inside and outside during sampling, which effectively brings convenience to the soil and rock sampling work. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional half-section diagram of the external rod for drilling according to the present invention;

[0020] Figure 3 This is a three-dimensional schematic diagram of the motor shaft of the present invention;

[0021] Figure 4 This is a three-dimensional schematic diagram of the borehole soil layer cylinder of the present invention;

[0022] Figure 5 This is a three-dimensional half-section diagram of the drill rod of the present invention;

[0023] Figure 6 This is a three-dimensional schematic diagram of the soil-storing inner cylinder of the present invention;

[0024] Figure 7 This is a schematic diagram of the right side of a partial section of the inner cylinder for storing soil according to the present invention;

[0025] Figure 8 This is a three-dimensional schematic diagram of the connecting rod of the present invention;

[0026] Figure 9 For the present invention Figure 2 Enlarged diagram of point A in the diagram;

[0027] Figure 10 For the present invention Figure 3 Enlarged diagram of point B in the image;

[0028] Figure 11 For the present invention Figure 7 Enlarged diagram of point C in the image.

[0029] In the diagram: Component outer frame 1, external drilling rod 11, motor shaft 12, fixed disc 13, drive slot 14, reverse push block 15, receiving connecting block 16, outward push frame 17, drilling soil cylinder 18, drilling rod 1801, diversion channel 1802, drainage channel 1803, plugging cap 1804, drilling bit 1805, connecting column 1806, disassembly protrusion 1807, tension inner groove 19, sealing baffle 2, connecting hole 21, distance extending slide rod 22, linkage support rod 23, extension stop rod 24, upper and lower sliding groove 25, moving slider 26, limiting top block 2 601, Reset spring plate; 2602, Extension support column; 2603, Downward pressure rod; 2604, Anti-detachment frame; 2605, Guide outer plate; 2606, Soil storage inner cylinder; 301, Sleeve ring; 302, Connecting rod; 303, Protruding block; 304, Guide rod; 304, Filter screen; 31, Extrusion round plate; 32, Telescopic hollow tube; 33, Leak-proof baffle; 34, Air pressure transmission pipe; 35, Sealing cap; 36, Placement inner groove; 37, Push-out spring; 3701, Movable outer plate; 3702, Limiting collar; 3703, Seamless guide ring; 3704, Soil cutting plate; 3705, Fitting inner ring; 3706. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 11 This invention provides a technical solution: a drilling assembly with segmented replacement function, a linkage assembly with sealing and soil-proofing function, and a soil-taking assembly with multi-layer synchronous soil-taking function. The linkage assembly is located on one side of the inner end of the drilling assembly, while the soil-taking assemblies are evenly located on the middle side of the inner end of the drilling assembly. The drilling assembly includes an outer frame 1, an external drilling rod 11, a motor shaft 12, a fixed disc 13, a drive groove 14, a counter-pushing block 15, a receiving connecting block 16, an outward pushing frame 17, a drilling soil layer cylinder 18, and a tension inner groove 19. The external drilling rod 11 is movably connected to the outer frame 1. On one side of the middle of the borehole, the motor shaft 12 is located on the middle of the inner end of the borehole outer rod 11. The fixed disc 13 is connected to the lower end of the motor shaft 12 by screws. The drive groove 14 is opened on one side of the lower end of the fixed disc 13. The push block 15 is welded to one side of the lower end of the fixed disc 13. The receiving block 16 is welded to the middle of the lower end of the fixed disc 13. The outward push frame 17 is welded to one side of the lower end of the receiving block 16. The borehole soil cylinder 18 is welded to the outer side of the lower end of the borehole outer rod 11. The tension groove 19 is opened on one side of the inner end of the borehole soil cylinder 18.

[0032] One end of the motor shaft 12 is connected to the motor, which can be connected to the inner end of the drilled outer rod 11 by screws.

[0033] The external drilling rod 11 is arranged through one end of the component outer frame 1, wherein the driving slot 14 is square, the counter-pushing block 15 is located on one side of the outer end of the driving slot 14, the receiving connecting block 16 is arranged through the middle end of the external drilling rod 11, the outward pushing frame 17 is located inside the drilling soil tube 18, wherein the outward pushing frame 17 is arc-shaped, and a circular hole is evenly opened through the middle side of one end of the drilling soil tube 18.

[0034] The arc length of the outward pushing frame 17 is less than the arc length of the pull-out inner groove 19. The reserved length of the pull-out inner groove 19 allows the connecting hole 21 to be exposed and correspond to the position of the soil storage inner cylinder 3.

[0035] A drill rod 1801 is welded to the lower end of the borehole soil cylinder 18. A drainage groove 1802 is opened on the inner side of the upper end of the drill rod 1801. The drainage groove 1802 is conical. A drainage groove 1803 is opened through one side of the lower end of the drill rod 1801. The drainage groove 1803 is opened through the drainage groove 1802. A plugging cap 1804 is placed on one side of the inner end of the drainage groove 1803. The plugging cap 1804 is connected to the drill rod 1801 by a snap-fit. A drill bit 1805 is placed at the lower end of the drill rod 1801. A connecting column 1806 is welded to the middle side of the upper end of the drill bit 1805. The connecting column 1806 is screwed to the drill rod 1801. An integrally formed disassembly protrusion 1807 is provided on the outer side of the upper end of the drill bit 1805.

[0036] The diversion channel 1802 can be used to centrally treat the water flow inside the borehole soil cylinder 18. At the same time, the drainage channel 1803 is opened at an angle to facilitate the water flow out from the inside of the diversion channel 1802. Furthermore, the sealing of the diversion channel 1802 can be controlled by the plug cap 1804. In addition, the drilling bit 1805 can be disassembled from the drilling rod 1801 by means of the connecting column 1806.

[0037] The linkage assembly includes a sealing baffle 2, a connecting hole 21, a distance-extending slide rod 22, a linkage support rod 23, an extension stop rod 24, an upper and lower sliding groove 25, and a movable slider 26. The connecting hole 21 is uniformly opened through one end of the sealing baffle 2. The distance-extending slide rod 22 is fixed to the upper end of the sealing baffle 2. The linkage support rod 23 is welded to the upper side of one end of the distance-extending slide rod 22. The linkage support rod 23 is arranged in an L-shape. The extension stop rod 24 is fixed to one end of the linkage support rod 23. The upper and lower sliding groove 25 is opened in the middle of one end of the extension stop rod 24. One end of the movable slider 26 is located on the inner side of the upper and lower sliding groove 25.

[0038] The sealing baffle 2 is located on one side of the inner end of the tension groove 19. One end of the tension-increasing slide rod 22 is located on one side of the inner end of the drilled outer rod 11. The tension-increasing slide rod 22 and the sealing baffle 2 are integrally formed. One end of the linkage support rod 23 is located at the lower end of the fixed disc 13. The linkage support rod 23 and the extension stop rod 24 are integrally formed. The upper surface of the extension stop rod 24 is in contact with the lower surface of the fixed disc 13.

[0039] A limiting top block 2601 is welded to one end of the movable slider 26. A reset spring plate 2602 connected by screws is provided on one side of the lower end of the movable slider 26. The other end of the reset spring plate 2602 is connected to the extension stop 24 by screws. An extension support 2603 is welded to the lower side of one end of the limiting top block 2601. A pressure rod 2604 is placed on the outside of the extension support 2603. The pressure rod 2604 is arranged in an arc shape. The pressure rod 2604 is welded to the external rod 11 of the drilling hole. An anti-detachment frame 2605 is provided on one side of the lower end of the pressure rod 2604. An integrally formed guide plate 2606 is provided at one end of the anti-detachment frame 2605. One end of the extension support 2603 is placed at the inner end of the anti-detachment frame 2605.

[0040] When the fixed disc 13 rotates one-quarter of its length, its connecting hole 21 is exposed. Specifically, the motor shaft 12 drives the fixed disc 13 to rotate. Subsequently, under the action of the driving slot 14 and the limiting top block 2601, the fixed disc 13 drives the sealing baffle 2 to rotate via the extension slide rod 22. After the fixed disc 13 rotates one-quarter of its length, the other end of the sealing baffle 2 abuts against the other side of the tension inner groove 19, at which point the connecting hole 21 is exposed. At the same time, during the rotation of the sealing baffle 2, the lower pressure rod 2604 and the extension support 2... Under the action of 603, the limiting top block 2601 is pressed down. At this time, the limiting top block 2601 gradually leaves the drive slot 14, while the moving slider 26 moves downward on the upper and lower sliding grooves 25. The reset spring plate 2602 undergoes a stored deformation. Once the limiting top block 2601 completely leaves the drive slot 14, the fixed disc 13 will not push the sealing baffle 2. Furthermore, when the fixed disc 13 reverses, the counter-pushing block 15 can push the limiting top block 2601, causing it to re-enter the drive slot 14.

[0041] The soil extraction assembly includes a soil storage inner cylinder 3, a filter screen 31, a compression disc 32, a telescopic hollow tube 33, an air-proof baffle 34, a pneumatic transmission pipe 35, a sealing cap 36, and a placement inner groove 37. The filter screen 31 is screwed to the lower side of one end of the soil storage inner cylinder 3. The compression disc 32 is located on one side of the inner end of the soil storage inner cylinder 3. One end of the telescopic hollow tube 33 is screwed to the middle side of one end of the compression disc 32, and one end of the telescopic hollow tube 33 penetrates the middle side of one end of the soil storage inner cylinder 3. The air-proof baffle 34 is welded to the lower side of one end of the extruded circular plate 32. One end of the air-proof baffle 34 passes through the soil storage inner cylinder 3. The air pressure pipe 35 is located on one side of the telescopic hollow pipe 33. The air pressure pipe 35 and the telescopic hollow pipe 33 are connected by screws. One end of the air pressure pipe 35 passes through the drilled outer rod 11. The sealing cap 36 is located on one side of the inner end of the air pressure pipe 35. The inner groove 37 is opened on the inner side of one end of the soil storage inner cylinder 3.

[0042] The soil-storing inner cylinder 3 is pushed by rotating the fixed disc 13 by half its length. This half-length of the fixed disc 13 is based on pushing the sealing baffle 2 by one-quarter of its length. Then, the outward pushing frame 17 and the guide rod 304 are used to push all the soil-storing inner cylinders 3. At this time, the soil-storing inner cylinder 3 passes through the connecting hole 21 to collect the rock mass, and then retracts into the borehole soil layer cylinder 18. The fixed disc 13 is then continuously reversed so that the sealing baffle 2 is reset.

[0043] With the help of the filter screen 31, water can be filtered from the soil and rock entering the inner cylinder 3. At this time, the air-proof baffle 34 can seal the filter screen 31 during the movement of the extrusion plate 32. The telescopic hollow tube 33 is elastic, and there is no sealed connection between the telescopic hollow tube 33 and the extrusion plate 32, which facilitates ventilation.

[0044] A pneumatic pump is connected to the outer end of the pneumatic pipeline 35 so that the pneumatic pressure can squeeze the extrusion disc 32, making it easier to remove the soil and rock sample from the inside of the soil storage cylinder 3.

[0045] There are four sets of soil storage cylinders 3. The position of the soil storage cylinder 3 corresponds to the position of the circular hole. One end of the soil storage cylinder 3 is opened through a fault, and the filter screen 31 is located inside the fault. One end of the soil storage cylinder 3 is fitted with a connecting ring 301. An integrally formed connecting rod 302 is set between the two connecting rings 301. An integrally formed protruding block 303 is set on one side of the upper end of one of the connecting rings 301. A welded guide rod 304 is set on one side of the upper end of the protruding block 303. The guide rod 304 is arranged through the middle of the outward pushing frame 17.

[0046] The sleeve ring 301 is welded to the soil storage inner cylinder 3. By using the sleeve ring 301 and the connecting rod 32, all the soil storage inner cylinders 3 can move synchronously.

[0047] A push-out spring 3701 is placed on one side of the inner end of the inner groove 37. A movable outer plate 3702 is placed on the outer side of the inner end of the inner groove 37. A limiting collar 3703 is fitted on one side of the outer end of the movable outer plate 3702. The limiting collar 3703 is welded to the soil storage inner cylinder 3. A seamless guide ring 3704 is welded to one end of the movable outer plate 3702. An integrally formed soil cutting plate 3705 is set at one end of the seamless guide ring 3704. An integrally formed fitting inner ring 3706 is set on one side of the other end of the seamless guide ring 3704.

[0048] By using the ejector spring 3701 and the movable outer plate 3702, once the connecting hole 21 is aligned with the cutting plate 3705, the seamless guide ring 3704 will be locked inside the connecting hole 21, thereby sealing the connecting hole 21 and preventing soil and rock from entering the interior of the borehole soil layer cylinder 18. At the same time, it enables communication between the inner soil storage cylinder 3 and the external soil and rock.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A core drilling system for geotechnical engineering exploration, comprising a drilling assembly with segmented replacement function, a linkage assembly with sealing and soil-proofing function, and a soil sampling assembly with multi-layer synchronous soil sampling function, characterized in that: The linkage component is located on one side of the inner end of the drilling component, wherein the soil sampling component is evenly located on the middle side of the inner end of the drilling component. The drilling component includes a component outer frame (1), a drilling outer rod (11), a motor shaft (12), a fixed disc (13), a drive slot (14), a counter-push block (15), a receiving connecting block (16), an outward push frame (17), a drilling soil layer cylinder (18), and a tension inner groove (19). The drilling outer rod (11) is movably connected to the middle side of one end of the component outer frame (1), and the motor shaft (12) is located on the middle side of the inner end of the drilling outer rod (11). The disc (13) is connected to the lower end of the motor shaft (12) by screws. The drive groove (14) is opened on one side of the lower end of the fixed disc (13). The counter-push block (15) is welded to one side of the lower end of the fixed disc (13). The receiving block (16) is welded to the middle side of the lower end of the fixed disc (13). The outward push frame (17) is welded to one side of the lower end of the receiving block (16). The borehole soil cylinder (18) is welded to the outer side of the lower end of the borehole outer rod (11). The tension inner groove (19) is opened on one side of the inner end of the borehole soil cylinder (18). The linkage assembly includes a sealing baffle (2), a connecting hole (21), a distance-extending slide rod (22), a linkage support rod (23), an extension stop rod (24), an upper and lower sliding groove (25), and a movable slider (26). The connecting hole (21) is uniformly opened through one end of the sealing baffle (2). The distance-extending slide rod (22) is fixed to the upper end of the sealing baffle (2). The linkage support rod (23) is welded to the upper side of one end of the distance-extending slide rod (22). The extension stop rod (24) is fixed to one end of the linkage support rod (23). The upper and lower sliding groove (25) is opened in the middle of one end of the extension stop rod (24). One end of the movable slider (26) is located on the inner side of the upper and lower sliding groove (25). The sealing baffle (2) is located on one side of the inner end of the tension groove (19), wherein one end of the extension slide rod (22) is located on one side of the inner end of the drilled outer rod (11), the extension slide rod (22) and the sealing baffle (2) are integrally formed, wherein one end of the linkage support rod (23) is located at the lower end of the fixed disc (13), the linkage support rod (23) and the extension stop rod (24) are integrally formed, wherein the upper surface of the extension stop rod (24) is in contact with the lower surface of the fixed disc (13); One end of the movable slider (26) is provided with a welded limiting top block (2601), and a screw-connected reset spring plate (2602) is provided on one side of the lower end of the movable slider (26). The other end of the reset spring plate (2602) is connected to the extension stop (24) by screws. An extension support (2603) is provided on the lower side of one end of the limiting top block (2601), and a pressure rod (2604) is placed on the outside of the extension support (2603). The pressure rod (2604) is arranged in an arc shape. The pressure rod (2604) is welded to the external rod (11) of the drilling hole. An anti-detachment frame (2605) is provided on one side of the lower end of the pressure rod (2604). An integrally formed guide outer plate (2606) is provided on one end of the anti-detachment frame (2605). One end of the extension support (2603) is placed on the inner end of the anti-detachment frame (2605).

2. The borehole coring system for geotechnical engineering exploration according to claim 1, characterized in that: The external borehole rod (11) is arranged through one end of the outer frame (1) of the assembly, wherein the drive slot (14) is square, the reverse push block (15) is located on one side of the outer end of the drive slot (14), wherein the receiving block (16) is arranged through the middle end of the external borehole rod (11), the outward push frame (17) is located inside the borehole soil cylinder (18), wherein the outward push frame (17) is arc-shaped, and a circular hole is evenly opened through the middle side of one end of the borehole soil cylinder (18).

3. A core drilling system for geotechnical engineering exploration according to claim 2, characterized in that: The lower end of the borehole soil cylinder (18) is provided with a welded drill rod (1801), wherein a drainage groove (1802) is opened on the inner side of the upper end of the drill rod (1801), the drainage groove (1802) is tapered, and a drainage groove (1803) is opened through one side of the lower end of the drill rod (1801), the drainage groove (1803) is opened through the drainage groove (1802), and a plug cap (1804) is placed on one side of the inner end of the drainage groove (1803). The plugging cap (1804) and the drilling rod (1801) are connected by a snap-fit. A drilling bit (1805) is placed at the lower end of the drilling rod (1801). A connecting post (1806) is welded to the middle side of the upper end of the drilling bit (1805). The connecting post (1806) is screwed to the drilling rod (1801). An integrally formed disassembly protrusion (1807) is provided on the outer side of the upper end of the drilling bit (1805).

4. The core drilling system for geotechnical engineering exploration according to claim 1, characterized in that: The soil extraction assembly includes a soil storage inner cylinder (3), a filter screen (31), a compression disc (32), a telescopic hollow tube (33), an air-proof baffle (34), a pneumatic pipeline (35), a sealing cap (36), and a placement inner trough (37). The filter screen (31) is connected to the lower side of one end of the soil storage inner cylinder (3) by screws. The compression disc (32) is located on one side of the inner end of the soil storage inner cylinder (3). One end of the telescopic hollow tube (33) is connected to the middle side of one end of the compression disc (32) by screws. One end of the telescopic hollow tube (33) penetrates one end of the soil storage inner cylinder (3). The arrangement is as follows: one end of the air-proof baffle (34) is welded to the lower side of one end of the extruded circular plate (32), and one end of the air-proof baffle (34) passes through the soil storage inner cylinder (3). The air pressure pipe (35) is located on one side of the telescopic hollow pipe (33). The air pressure pipe (35) and the telescopic hollow pipe (33) are connected by screws. One end of the air pressure pipe (35) passes through the external rod (11) of the borehole. The sealing cap (36) is located on one side of the inner end of the air pressure pipe (35). The inner groove (37) is opened on the inner side of one end of the soil storage inner cylinder (3).

5. A core drilling system for geotechnical engineering exploration according to claim 4, characterized in that: The number of sets of the soil storage inner cylinder (3) is four, wherein the position of the soil storage inner cylinder (3) corresponds to the position of the circular hole. One end of the soil storage inner cylinder (3) is opened through a fault, wherein the filter screen (31) is located inside the fault. One end of the soil storage inner cylinder (3) is fitted with a connecting ring (301), and an integrally formed connecting rod (302) is provided between the two connecting rings (301). One of the connecting rings (301) is provided with an integrally formed protrusion (303) on one side of the upper end, and a welded guide rod (304) is provided on one side of the upper end of the protrusion (303). The guide rod (304) is arranged through the middle of the outward push frame (17).

6. A core drilling system for geotechnical engineering exploration according to claim 5, characterized in that: A push-out spring (3701) is placed on one side of the inner end of the inner groove (37), and a movable outer plate (3702) is placed on the outer side of the inner end of the inner groove (37). A limiting collar (3703) is fitted on one side of the outer end of the movable outer plate (3702), and the limiting collar (3703) is welded to the soil storage cylinder (3). A seamless guide ring (3704) is welded to one end of the movable outer plate (3702), and an integrally formed soil cutting plate (3705) is provided on one end of the seamless guide ring (3704). An integrally formed fitting inner ring (3706) is provided on one side of the other end of the seamless guide ring (3704).

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