A sampling method for foundation detection of water conservancy projects

Abstract

The invention discloses a method for sampling detection of foundation of a water conservancy project, and relates to the technical field of detection and sampling. The method comprises a drill rod, a drill bit is fixedly installed at the end of the drill rod, a plurality of sampling notches 1 are provided on the lower surface of the drill bit, a switching disk is rotatably connected to the inner wall of the drill bit, a plurality of sampling notches 2 are provided on the surface of the switching disk; a sliding groove is provided on the inner wall of the drill rod, a sampling barrel is fixedly installed at the end of a moving rod extending out of the sliding groove, and a sealing plate is provided under the sampling barrel; the method for sampling detection of foundation of a water conservancy project can prevent soil from entering the sampling barrel before the drill bit descends to a target sampling depth through the staggered sampling notches 1 and 2; and after the sampling barrel finishes sampling the target depth section below the foundation, the sampling barrel can be sealed in time, so as to avoid changes in data such as the natural moisture of the soil sample in the sampling barrel, and improve the quality of the sampled soil taken out for sampling detection of foundation of the water conservancy project.

Description

Technical Field

[0001] The invention relates to the technical field of detection and sampling, in particular to a method for detecting and sampling a foundation of a water conservancy project. Background Art

[0002] Water conservancy projects are projects built to control and allocate natural surface water and groundwater to achieve the purpose of eliminating harm and promoting benefits. They are also called water projects. The foundation rock and soil test and inspection is the primary prerequisite and necessary link for the reliable, reasonable and economical design parameters of the foundation of water conservancy projects. Therefore, it is of great significance to conduct scientific and accurate foundation rock and soil test and inspection in water conservancy projects. The technical approach to realize the foundation rock and soil test and inspection of water conservancy projects includes sample collection, sample sealing, sample transportation, and sample testing. After drilling a hole to reach the target formation with drilling equipment, the target formation is sampled by sampling equipment to select samples of foundation rock and soil.

[0003] For example, a foundation detection sampling equipment and sampling method for water conservancy projects with the separation number CN113959769A, it can be known that during the descent of the sampling tube, the bottom tube will be lowered, and then the lower pressure tube will be lowered. At this time, the soil will push open the elastic opening and closing plate, and the soil can enter the interior of the sampling tube. The elastic opening and closing plate will push the transmission threaded rod to both sides, causing the transmission roller to rotate. Through the transmission of the conveyor belt, the transmission gear rotates, and then the gear ring rotates. When the gear ring rotates, the lower pressure threaded rod will be lowered, and then the lower pressure block will be pushed out to break the ground, thereby improving the efficiency of breaking the ground and being more conducive to sampling work.

[0004] However, a drill bit with a sampling opening is provided on the lower surface of the drill rod, and a sampling tube is set in the drill rod. The drill rod is lowered, and the sampled soil enters the sampling tube through the sampling opening on the surface of the drill bit. In this way, when the sampling depth has not yet been reached, the external soil will enter the sampling tube, reducing the sampling accuracy.

[0005] In addition, after sampling is completed, it is difficult to seal the sampling tube immediately in the existing water conservancy project foundation detection methods. It is often necessary to seal it after collecting on the ground, which will cause changes in data such as the natural moisture of the soil sample, affecting the accuracy of the foundation detection results. Summary of the invention

[0006] The purpose of the present invention is to provide a method for sampling water conservancy project foundation detection, which solves the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a method for sampling water conservancy project foundation detection, comprising the following steps:

[0008] The drill rod is driven to move downward and rotate by an external driving device, and the drill bit can start drilling toward the target foundation. During this process, since the sampling slot 1 and the sampling slot 2 are not aligned, the soil will not enter the drill bit through the sampling slot 1 when the drill rod drives the drill bit to descend.

[0009] The sampling tube is opened and lowered. After the drill bit is lowered to the sampling depth, the motor is turned on to drive the moving block and the slide rod to move upward, so that the rotating column rotates. Under the meshing action of the teeth and the incomplete gear, the sealing plate is deflected from the bottom of the sampling tube to the outside, so that the sampling tube can be opened;

[0010] As the moving block continues to move upward, the sampling tube moves downward to a position where it abuts against the sampling notch 2 under the meshing action of the gear, rack row 1 and rack row 2;

[0011] And as the rotating column rotates, the plurality of sampling slots 2 will be aligned with the sampling slots 1 provided on the lower surface of the drill bit;

[0012] During drilling and sampling, as the drill rod and the drill bit continue to descend, the soil in the target sampling depth section can enter the sampling tube through sampling slots 1 and 2, so as to complete the accurate sampling of the target depth section in the foundation detection sampling.

[0013] After sampling, the sampling tube rises and closes. After the sampling tube finishes sampling the target depth section below the foundation, the motor is reversed to drive the moving block to move downward and reset, which will cause the sampling tube to move upward to the initial position before sampling. After the sampling tube moves upward to the initial position, the teeth on the rotating column will mesh with the incomplete gear again, so that the sealing plate can be reversed and reset, so that the sampling tube can be sealed in time after the sampling tube finishes sampling.

[0014] Optionally, a drill bit is fixedly mounted on the end of the drill rod, a plurality of sampling slots 1 are provided on the lower surface of the drill bit, a switching disk is rotatably connected to the inner wall of the drill bit, and a plurality of sampling slots 2 are provided on the surface of the switching disk;

[0015] The inner wall of the drill rod is provided with a slide groove, the inner wall of the slide groove is slidably connected with a moving rod, the end of the moving rod extending out of the slide groove is fixedly installed with a sampling barrel, and a sealing plate is provided below the sampling barrel;

[0016] The switching component is arranged on the switching disk, and is used to switch the plurality of sampling slots 2 to a position aligned with the plurality of sampling slots 1;

[0017] The sampling component is arranged inside the drill bit and cooperates with the switching component, so that the sampling tube can be lowered to a position fitting with the second sampling notch when the switching component is working;

[0018] The moving component is arranged inside the drill bit and cooperates with the switching component to enable the sealing plate to rotate to a position where it does not block the descent of the sampling cylinder before the sampling cylinder descends;

[0019] The cleaning component is arranged inside the drill bit and cooperates with the moving component to clean the sample soil residue remaining on the deflected sealing plate.

[0020] Optionally, the switching component comprises a plurality of fixing rods 1 fixedly connected to the inner wall of the drill rod, and the ends of the plurality of fixing rods 1 are commonly fixedly connected with a disc;

[0021] The upper surface of the switching disk is fixedly connected to a rotating column, the surface of the rotating column is provided with an arc-shaped sliding groove, the upper surface of the disc is provided with a motor, the output shaft of the motor is fixedly connected to a threaded rod, the surface of the threaded rod is threadedly connected to a moving block, one end of the moving block is fixedly connected to a sliding rod adapted to the arc-shaped sliding groove, the other end of the moving block is fixedly connected to a rack row 1, the surface of the rack row 1 is slidably connected to a limiting rod, and the end of the limiting rod is fixedly connected to the lower surface of the disc.

[0022] Optionally, the sampling component comprises a support plate fixedly connected to the inner wall of the drill pipe, a rotating rod is connected to the surface of the support plate for fixed-axis rotation, and a gear meshing with the rack row is fixedly connected to the surface of the rotating rod;

[0023] A hinge is provided on the upper surface of the sampling tube, and a cover plate is hingedly connected to the sampling tube through the hinge. A pull ring is provided on the upper surface of the cover plate. A fixed block is fixedly connected to the surface of the sampling tube, and a second rack row meshing with the gear is fixedly connected to the surface of the fixed block. A telescopic rod is provided on the lower surface of the disc, and an end of the telescopic rod is fixedly connected to the upper surface of the second rack row.

[0024] Optionally, four groups of the sampling tubes and the rotating rods are provided, and the four groups of the sampling tubes and the four groups of the rotating rods are distributed in a circular array around the axis of the drill rod, and a bevel gear transmission mechanism is provided between any two adjacent rotating rods.

[0025] Optionally, the moving component includes a plurality of fixing rods 2 fixedly connected to the inner wall of the drill bit, the ends of the plurality of fixing rods 2 are commonly fixedly connected to a fixing ring, the upper surface of the fixing ring is connected to a rotating shaft for fixed axis rotation, and the rotating shaft passes through the sealing plate and is fixedly connected thereto;

[0026] An incomplete gear is fixedly connected to the surface of the rotating shaft, and a plurality of teeth meshing with the incomplete gear are fixedly connected to the surface of the rotating column.

[0027] Optionally, the cleaning component comprises a rotating plate fixedly connected to the end of the rotating rod, a moving column is fixedly connected to the surface of the rotating plate, and a moving frame is slidably connected to the outer surface of the moving column;

[0028] The inner wall of the drill pipe is fixedly connected with a mounting ring, the inner wall of the mounting ring is fixedly mounted with a piston cylinder, the inner wall of the piston cylinder is slidably connected with a piston plate, the surface of the piston plate is fixedly connected with a piston rod, and the end of the piston rod extending out of the piston cylinder is fixedly connected to the movable frame.

[0029] Optionally, an air inlet pipe and a cleaning pipe are fixedly connected to the surface of the piston cylinder, a one-way valve 1 is provided on the surface of the air inlet pipe, a one-way valve 2 is provided on the surface of the cleaning pipe, and a plurality of air outlets are obliquely opened on the surface of the cleaning pipe.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. When the present invention performs drilling operation toward the target foundation and has not reached the target sampling depth, since sampling slot 1 and sampling slot 2 are staggered and not aligned, during this process, soil will not enter the interior of the drill bit through sampling slot 1, effectively avoiding the problem of external soil entering the sampling tube before reaching the sampling depth, thereby ensuring the accuracy of sampling and taking out soil samples for foundation detection of water conservancy projects.

[0032] Second, after the drill bit is lowered to the sampling depth, the motor is turned on to drive the moving block and the slide rod to move upward, so that the rotating column rotates. Under the meshing action of the teeth and the incomplete gear, the sealing plate is deflected from the bottom of the sampling tube to the outside, so that the sampling tube can be opened; and as the moving block continues to move upward, under the meshing action of the gear, rack row 1 and rack row 2, the sampling tube is moved downward to a position abutting against the sampling notch 2;

[0033] And as the rotating column rotates, multiple sampling slots 2 will be aligned with sampling slots 1 opened on the lower surface of the drill bit. At this time, as the drill rod and the drill bit continue to descend, the soil in the target sampling depth segment can enter the sampling tube through sampling slots 1 and 2, so as to complete the accurate sampling of the target depth segment in the foundation detection sampling.

[0034] 3. After the sampling tube finishes sampling the target depth section below the foundation, the present invention reverses the motor to drive the moving block and the sampling tube to reset. After the sampling tube moves upward to the initial position, the teeth on the rotating column will mesh with the incomplete gear again, so that the sealing plate can be reversed and reset, so that the sampling tube can be sealed in time after the sampling tube finishes sampling, effectively avoiding changes in data such as the natural humidity of the soil sample in the sampling tube, and ensuring the accuracy of the soil sample detection results of the water conservancy project foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of the use of the present invention;

[0036] Figure 2 It is an external schematic diagram of the structure of the present invention;

[0037] Figure 3 is a cross-sectional view of the structure of the present invention;

[0038] Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle;

[0039] Figure 5 It is a schematic diagram of the transfer rod structure of the present invention;

[0040] Figure 6 It is a schematic diagram of the piston cylinder structure in the present invention.

[0041] In the figure: 1, drill rod; 2, drill bit; 3, sampling slot 1; 4, switching plate; 5, sampling slot 2; 6, rotating column; 7, fixed ring; 8, rotating shaft; 9, incomplete gear; 10, sealing plate; 11, sampling tube; 12, rack row 2; 13, telescopic rod; 14, threaded rod; 15, motor; 16, disc; 17, fixed rod 1; 18, arc-shaped slide groove; 19, moving rod; 20, slide Groove; 21, teeth; 22, limit rod; 23, slide rod; 24, moving block; 25, rack row 1; 26, gear; 27, fixed block; 28, cover plate; 29, hinge; 30, support plate; 31, rotating rod; 32, rotating plate; 33, moving column; 34, piston rod; 35, moving frame; 36, mounting ring; 37, piston cylinder; 38, air outlet; 39, air inlet pipe; 40, cleaning pipe. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] For example, see Figures 1 to 6 The present invention provides a technical solution: a method for sampling water conservancy project foundation detection is as follows:

[0044] The drill rod 1 is driven downward and rotated by an external driving device, and the drill bit 2 can start drilling into the target foundation. During this process, since the sampling slot 1 3 and the sampling slot 2 5 are not aligned, the soil will not enter the drill bit 2 through the sampling slot 1 3 when the drill rod 1 drives the drill bit 2 to descend.

[0045] After the drill bit 2 is lowered to the sampling depth, the motor 15 is turned on to drive the moving block 24 and the slide rod 23 to move upward, so that the rotating column 6 rotates. Under the meshing action of the teeth 21 and the incomplete gear 9, the sealing plate 10 is deflected from the bottom of the sampling tube 11 to the outside, so that the sampling tube 11 can be opened;

[0046] As the moving block 24 continues to move upward, the gear 26, the rack row 1 25 and the rack row 2 12 mesh with each other, and the sampling tube 11 moves downward to a position where it contacts the sampling notch 2 5.

[0047] And as the rotating column 6 rotates, the plurality of sampling slots 2 5 will also be aligned with the sampling slots 1 3 provided on the lower surface of the drill bit 2;

[0048] At this time, as the drill rod 1 and the drill bit 2 continue to descend, the soil in the target sampling depth section can enter the sampling tube 11 through the sampling slot 1 3 and the sampling slot 2 5, so as to complete the accurate sampling of the target depth section in the foundation detection sampling.

[0049] After the sampling tube 11 finishes sampling the target depth section below the foundation, the motor 15 is reversed to drive the moving block 24 to move downward and reset, which will cause the sampling tube 11 to move upward to the initial position before sampling. After the sampling tube 11 moves upward to the initial position, the teeth 21 on the rotating column 6 will mesh with the incomplete gear 9 again, so that the sealing plate 10 can be reversed and reset, so that the sampling tube 11 can be sealed in time after the sampling tube 11 finishes sampling.

[0050] Furthermore, since a drill bit 2 is fixedly mounted on the end of the drill rod 1, a plurality of sampling notches 3 are provided on the lower surface of the drill bit 2, a switching disk 4 is fixedly rotatably connected to the inner wall of the drill bit 2, a plurality of sampling notches 5 are provided on the surface of the switching disk 4, a slide groove 20 is provided on the inner wall of the drill rod 1, a moving rod 19 is slidably connected to the inner wall of the slide groove 20, a sampling barrel 11 is fixedly mounted on the end of the moving rod 19 extending out of the slide groove 20, and a sealing plate 10 is provided below the sampling barrel 11;

[0051] The switching component is arranged on the switching disk 4, and the inside of the drill bit 2 is provided with a sampling component, a moving component and a cleaning component. The switching component comprises a plurality of fixed rods 17 fixedly connected to the inner wall of the drill rod 1, and the ends of the plurality of fixed rods 17 are fixedly connected to a disk 16;

[0052] The upper surface of the switching disk 4 is fixedly connected with a rotating column 6, and an arc-shaped slide groove 18 is opened on the surface of the rotating column 6. The upper surface of the disc 16 is provided with a motor 15, and the output shaft of the motor 15 is fixedly connected with a threaded rod 14, and the surface of the threaded rod 14 is threadedly connected with a moving block 24, and one end of the moving block 24 is fixedly connected with a sliding rod 23 adapted to the arc-shaped slide groove 18, and the other end of the moving block 24 is fixedly connected with a rack row 25, and the surface of the rack row 25 is slidably connected with a limiting rod 22, and the end of the limiting rod 22 is fixedly connected to the lower surface of the disc 16.

[0053] When the present embodiment is used, the drill rod 1 is driven by an external driving device to rotate while moving downward, and the drill bit 2 can start drilling into the target foundation under the action of the drill bit 2. This is a relatively mature prior art and will not be described in detail here. Figure 2 and Figure 3 As shown, in this process, since the sampling slot 1 3 opened on the lower surface of the drill bit 2 and the sampling slot 2 5 opened on the surface of the switching disk 4 are staggered with each other and not aligned, that is, when the drill rod 1 drives the drill bit 2 to descend, the soil will not enter the interior of the drill bit 2 through the sampling slot 1 3, which effectively solves the problem that the external soil enters the sampling tube 11 before the sampling depth is reached, thereby reducing the sampling accuracy.

[0054] As the drill rod 1 and the drill bit 2 continue to descend, after the drill bit 2 descends to the sampling depth, Figure 3 and Figure 4 As shown, the motor 15 is turned on, driving the threaded rod 14 to start rotating. Since the movable block 24 threadedly connected to the surface of the threaded rod 14 is limited by the limit rod 22 and can only move in the vertical direction, the rotation of the threaded rod 14 will drive the movable block 24 to move upward, thereby causing the slide bar 23 to move upward. As the slide bar 23 moves upward, since the slide bar 23 is slidably connected to the arc slide groove 18, as the slide bar 23 moves upward, the rotating column 6 will start to rotate 225 degrees, and the rotation of the rotating column 6 will drive the switching disk 4 to rotate 225 degrees, so that the multiple sampling slots 2 5 opened on the surface of the switching disk 4 can be aligned with the sampling slot 1 3 opened on the lower surface of the drill bit 2. At this time, as the drill rod 1 and the drill bit 2 continue to descend, that is, while descending, the soil at the target sampling depth can pass through the sampling slot 1 3 and the sampling slot 2 5 into the sampling cylinder 11 in the drill bit 2.

[0055] Embodiment 2, based on the above embodiment:

[0056] Further, the sampling component and the moving component in the first embodiment are disclosed. The sampling component includes a support plate 30 fixedly connected to the inner wall of the drill pipe 1, a rotating rod 31 is connected to the surface of the support plate 30 for fixed axis rotation, and a gear 26 meshing with the rack row 1 25 is fixedly connected to the surface of the rotating rod 31;

[0057] A hinge 29 is provided on the upper surface of the sampling tube 11, and a cover plate 28 is hingedly connected to the sampling tube 11 through the hinge 29. A pull ring is provided on the upper surface of the cover plate 28. A fixing block 27 is fixedly connected to the surface of the sampling tube 11, and a rack row 2 12 meshing with the gear 26 is fixedly connected to the surface of the fixing block 27. A telescopic rod 13 is provided on the lower surface of the disc 16, and an end of the telescopic rod 13 is fixedly connected to the upper surface of the rack row 2 12.

[0058] There are four groups of sampling tubes 11 and rotating rods 31 , and the four groups of sampling tubes 11 and the four groups of rotating rods 31 are distributed in a circular array around the axis of the drill pipe 1 , and a bevel gear transmission mechanism is provided between each two adjacent rotating rods 31 .

[0059] The moving part includes a plurality of fixed rods 2 fixedly connected to the inner wall of the drill bit 2, the ends of the plurality of fixed rods 2 are commonly fixedly connected to a fixed ring 7, the upper surface of the fixed ring 7 is connected to a rotating shaft 8 for fixed axis rotation, and the rotating shaft 8 penetrates the sealing plate 10 and is fixedly connected thereto;

[0060] An incomplete gear 9 is fixedly connected to the surface of the rotating shaft 8 , and a plurality of teeth 21 meshing with the incomplete gear 9 are fixedly connected to the surface of the rotating column 6 .

[0061] When this embodiment is used, Figure 3 and Figure 4 As shown, when the motor 15 is turned on, the moving block 24 is driven to move upward, so that the rotating column 6 rotates. At the same time, the upward movement of the moving block 24 will also cause the rack row 1 25 to move upward synchronously. However, since the upper end of the rack row 1 25 is not provided with teeth meshing with the gear 26, that is, during the first upward movement of the moving block 24, the rotating column 6 will rotate, but the gear 26 will not rotate.

[0062] In this process, if Figure 3 As shown, as the rotating column 6 rotates, the teeth 21 on the surface of the rotating column 6 will mesh with the incomplete gear 9, thereby driving the incomplete gear 9 to rotate. When the teeth 21 are fully meshed with the incomplete gear 9, the incomplete gear 9 will just rotate 60 degrees. During this process, the sealing plate 10 will rotate 60 degrees around the rotating shaft 8, so that the sealing plate 10 can be deflected from the bottom of the sampling tube 11 to the outside. At the same time, the rack row 25 will also move to a position meshed with the gear 26.

[0063] It is worth noting that Figure 3 As shown, the four groups of teeth 21 correspond to the four groups of incomplete gears 9 one by one and are staggered, that is, the four groups of teeth 21 and the four groups of incomplete gears 9 are not located at the same height, thereby avoiding the problem that one group of incomplete gears 9 will mesh with another group of teeth 21 after meshing with one group of teeth 21, that is, when the sealing plate 10 rotates 60 degrees and deflects from the bottom of the sampling tube 11 to the outside, it will not rotate easily.

[0064] As the moving block 24 drives the rack row 1 25 to continue to move upward, the gear 26 will start to rotate. As the gear 26 rotates, the gear 26 and the rack row 2 12 mesh together, and the rack row 2 12 will move downward, thereby moving the sampling tube 11 downward. When the rack row 2 12 is fully meshed with the gear 26, the sampling tube 11 will also drop to a position abutting against the sampling slot 2 5.

[0065] At the same time, the slide rod 23 will also move to the end of the arc-shaped slide groove 18, which will cause the rotating column 6 to complete a rotation of 225 degrees, so that the multiple sampling slots 2 5 opened on the surface of the switching disk 4 can be aligned with the sampling slot 1 3 opened on the lower surface of the drill bit 2. At this time, as the drill rod 1 and the drill bit 2 continue to descend, the soil at the target sampling depth can pass through the sampling slot 1 3 and the sampling slot 2 5 into the sampling tube 11 in the drill bit 2 while descending, so as to complete the accurate sampling of the target depth segment in the foundation detection sampling, thereby improving the accuracy of subsequent soil sample detection.

[0066] Embodiment 3, based on the above embodiment:

[0067] Further, the cleaning component in the first embodiment is disclosed, the cleaning component includes a rotating plate 32 fixedly connected to the end of the rotating rod 31, a moving column 33 is fixedly connected to the surface of the rotating plate 32, and a moving frame 35 is slidably connected to the outer surface of the moving column 33;

[0068] The inner wall of the drill pipe 1 is fixedly connected with a mounting ring 36, the inner wall of the mounting ring 36 is fixedly installed with a piston cylinder 37, the inner wall of the piston cylinder 37 is slidably connected with a piston plate, the surface of the piston plate is fixedly connected with a piston rod 34, and the end of the piston rod 34 extending out of the piston cylinder 37 is fixedly connected to the movable frame 35.

[0069] The surface of the piston cylinder 37 is fixedly connected with an air inlet pipe 39 and a cleaning pipe 40 . A one-way valve 1 is provided on the surface of the air inlet pipe 39 , a one-way valve 2 is provided on the surface of the cleaning pipe 40 , and a plurality of air outlets 38 are obliquely provided on the surface of the cleaning pipe 40 .

[0070] When this embodiment is used, Figure 3 , Figure 5 and Figure 6As shown, with the rotation of the incomplete gear 9 , when the sealing plate 10 deflects from the bottom blocking the sampling tube 11 to the outside, the sealing plate 10 is just located obliquely below the cleaning tube 40 .

[0071] The rotation of the rotating rod 31 will drive the rotating plate 32 to rotate, and the rotation of the rotating plate 32 will cause the moving column 33 to perform a circular motion with the axis of the rotating rod 31 as a circle. Since the moving frame 35 slidably connected to the outer surface of the moving column 33 is limited by the piston rod 34 and can only move in the vertical direction, the circular motion of the moving column 33 will cause the moving frame 35 to drive the piston rod 34 to perform reciprocating motion in the vertical direction, thereby causing the piston cylinder 37 to perform piston motion, so that air can be sucked in from the air inlet pipe 39 and evenly discharged from the multiple air outlets 38 on the surface of the cleaning pipe 40, so that the sample soil residue remaining on the upper surface of the sealing plate 10 from the last sampling can be cleaned, which ensures the sealing performance of the sealing plate 10 when covering the sampling tube 11, and also avoids the problem of residue residue being mixed in the sample soil sampled next time, affecting the accuracy of the sample soil detection, thereby further improving the accuracy of the sampling for the foundation detection of the water conservancy project.

[0072] It is worth noting that after the sampling tube 11 finishes sampling the target depth section below the foundation, the motor 15 is reversed to drive the moving block 24 to move downward and reset. Similarly, the sampling tube 11 will first move upward to the initial position before sampling. Since the sample soil in the sampling tube 11 has a large static friction with the inner wall of the sampling tube 11, the sample soil will not fall during the upward movement of the sampling tube 11. After the sampling tube 11 moves upward to the initial position, the teeth 21 on the rotating column 6 will mesh with the incomplete gear 9 again, so that the sealing plate 10 can be reversed 60 degrees and reset, so that the sampling tube 11 can be sealed in time after the sampling of the sampling tube 11 is completed, effectively avoiding changes in data such as the natural humidity of the soil sample in the sampling tube 11, and ensuring the accuracy of the soil sample detection results of the foundation of the water conservancy project.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for sampling water conservancy project foundation detection, characterized in that: The following steps are involved: S1: Drilling with a drill rod, by driving the drill rod (1) downward and rotating, and using the drill bit (2) to start drilling towards the target foundation, since the sampling slot 1 (3) and the sampling slot 2 (5) are not aligned; S2: the sampling tube is opened and lowered. After the drill bit (2) is lowered to the sampling depth, the motor (15) is turned on to drive the moving block (24) and the slide rod (23) to move upward, so that the rotating column (6) rotates. Through the meshing of the teeth (21) and the incomplete gear (9), the sealing plate (10) is deflected to the outside to open the sampling tube (11); S3: Drilling and sampling. As the drill rod (1) and the drill bit (2) continue to descend, the soil at the target sampling depth section passes through the sampling slot 1 (3) and the sampling slot 2 (5) and enters the sampling tube (11), thereby completing accurate sampling of the target depth section. S4: After sampling, the sampling tube rises and closes. After the sampling tube (11) finishes sampling the target depth section below the foundation, the motor (15) is reversed to drive the moving block (24) to move downward and reset, so that the sampling tube (11) first moves upward to the initial position before sampling. After the sampling tube (11) moves upward to the initial position, the teeth (21) on the rotating column (6) will mesh with the incomplete gear (9) again, so that the sealing plate (10) is reversed and reset, and the sampling tube (11) is sealed in time; In S2, as the moving block (24) continues to move upward, the sampling tube (11) moves downward to a position where it abuts against the second sampling notch (5); As the rotating column (6) rotates, the plurality of sampling slots 2 (5) are aligned with the sampling slots 1 (3) provided on the lower surface of the drill bit (2); A drill bit (2) is fixedly mounted on the end of the drill rod (1), a plurality of sampling slots (3) are provided on the lower surface of the drill bit (2), a switching disk (4) is rotatably connected to the inner wall of the drill bit (2), and a plurality of sampling slots (5) are provided on the surface of the switching disk (4); The inner wall of the drill rod (1) is provided with a slide groove (20), the inner wall of the slide groove (20) is slidably connected to a moving rod (19), the end of the moving rod (19) extending out of the slide groove (20) is fixedly mounted with a sampling tube (11), and a sealing plate (10) is provided below the sampling tube (11); The switching disk (4) is provided with a switching component for switching the plurality of sampling slots 2 (5) to a position aligned with the plurality of sampling slots 1 (3); A sampling component is provided inside the drill bit (2) and cooperates with the switching component. When the switching component is in operation, the sampling tube (11) is lowered to a position where it fits with the second sampling notch (5); A moving component is provided inside the drill bit (2) and cooperates with the switching component to enable the sealing plate (10) to rotate to a position where it does not block the descent of the sampling cylinder (11) before the sampling cylinder (11) descends; A cleaning component is provided inside the drill bit (2) and cooperates with the moving component to clean the sample soil residue remaining on the deflected sealing plate (10); The switching component comprises a plurality of fixing rods (17) fixedly connected to the inner wall of the drill rod (1), and the ends of the plurality of fixing rods (17) are commonly fixedly connected to a disk (16); The upper surface of the switching disk (4) is fixedly connected to a rotating column (6), the surface of the rotating column (6) is provided with an arc-shaped sliding groove (18), the upper surface of the disk (16) is provided with a motor (15), the output shaft of the motor (15) is fixedly connected to a threaded rod (14), the surface of the threaded rod (14) is threadedly connected to a moving block (24), one end of the moving block (24) is fixedly connected to a sliding rod (23) adapted to the arc-shaped sliding groove (18), the other end of the moving block (24) is fixedly connected to a rack row (25), the surface of the rack row (25) is slidably connected to a limiting rod (22), and the end of the limiting rod (22) is fixedly connected to the lower surface of the disk (16); The sampling component comprises a support plate (30) fixedly connected to the inner wall of the drill rod (1), a rotating rod (31) being rotatably connected to the surface of the support plate (30), and a gear (26) meshing with the first rack (25) being fixedly connected to the surface of the rotating rod (31); The upper surface of the sampling tube (11) is provided with a hinge (29), and the sampling tube (11) is hingedly connected to a cover plate (28) via the hinge (29), and the upper surface of the cover plate (28) is provided with a pull ring, and the surface of the sampling tube (11) is fixedly connected to a fixing block (27), and the surface of the fixing block (27) is fixedly connected to a rack row 2 (12) meshing with the gear (26), and the lower surface of the disc (16) is provided with a telescopic rod (13), and the end of the telescopic rod (13) is fixedly connected to the upper surface of the rack row 2 (12); The moving component comprises a plurality of fixing rods 2 fixedly connected to the inner wall of the drill bit (2), the ends of the plurality of fixing rods 2 being commonly fixedly connected to a fixing ring (7), the upper surface of the fixing ring (7) being rotatably connected to a rotating shaft (8), the rotating shaft (8) passing through the sealing plate (10) and being fixedly connected thereto; An incomplete gear (9) is fixedly connected to the surface of the rotating shaft (8), and a plurality of teeth (21) meshing with the incomplete gear (9) are fixedly connected to the surface of the rotating column (6).

2. A method for sampling water conservancy project foundation detection according to claim 1, characterized in that: Four groups of the sampling tubes (11) and the rotating rods (31) are provided, and the four groups of the sampling tubes (11) and the four groups of the rotating rods (31) are distributed in a circular array around the axis of the drill rod (1), and a bevel gear transmission mechanism is provided between two adjacent rotating rods (31).

3. A method for sampling water conservancy project foundation detection according to claim 1, characterized in that: The cleaning component comprises a rotating plate (32) fixedly connected to the end of the rotating rod (31), a moving column (33) being fixedly connected to the surface of the rotating plate (32), and a moving frame (35) being slidably connected to the outer surface of the moving column (33).

4. A method for sampling water conservancy project foundation detection according to claim 3, characterized in that: The inner wall of the drill rod (1) is fixedly connected to a mounting ring (36), the inner wall of the mounting ring (36) is fixedly mounted to a piston cylinder (37), the inner wall of the piston cylinder (37) is slidably connected to a piston plate, the surface of the piston plate is fixedly connected to a piston rod (34), and the end of the piston rod (34) extending out of the piston cylinder (37) is fixedly connected to the movable frame (35).

5. A method for sampling water conservancy project foundation detection according to claim 4, characterized in that: An air intake pipe (39) and a cleaning pipe (40) are fixedly connected to the surface of the piston cylinder (37); a first one-way valve is provided on the surface of the air intake pipe (39); a second one-way valve is provided on the surface of the cleaning pipe (40); and a plurality of air outlets (38) are obliquely provided on the surface of the cleaning pipe (40).

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