Sampling device for soil between piles in compaction method foundation treatment

Abstract

The invention belongs to the technical field of compaction method foundation treatment, and particularly relates to a compaction method foundation treatment inter-pile soil sampling device which comprises a cylinder, a conical cylinder, a positioning cylinder, a sampling cylinder and a cutter, a plurality of guide holes are evenly distributed in the circumference of the cylinder, and the positioning cylinder is slidably arranged in the guide holes; a sampling barrel is arranged on the inner wall of the positioning barrel in a sliding manner; a plurality of guide blocks are evenly distributed on the circumference of the conical cylinder, sliding grooves are formed in the guide blocks, and the cutters are arranged in the sliding grooves in a sliding mode. The bottom sides of the cutters are in one-to-one correspondence with the sampling barrels; a plurality of positioning barrels extend out of the cylinder and abut against the inner wall of the exploratory well, a tip slope is arranged at one end of the sampling barrel, and after the sampling barrel is inserted into the inner wall of the exploratory well, the cutter is obliquely and downwards inserted into the soil body and coincides with the tip slope, so that a soil sample in the sampling barrel is cut off from the rear soil body. According to the device, the sampling device can be positioned and fixed, sampling and sample breaking can be rapidly carried out, samples can be conveniently taken out, and the sampling efficiency in an exploratory well is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compaction method foundation treatment, and particularly relates to a compaction method foundation treatment inter-pile soil sampling device. BACKGROUND

[0002] The compaction method is a commonly used foundation treatment method, which is mainly used for treating poor foundations such as collapsible loess, loose sand and silt. The basic principle is: through vibration, impact or ramming expansion, a hole is formed in the soil or a pile body is driven in, and the soil around the pile pipe is forcibly extruded, so that the void ratio of the soil between the piles is reduced, the density is increased, the bearing capacity is improved, and the collapsibility or liquefaction possibility is eliminated or weakened.

[0003] The effect of compaction method foundation treatment is ultimately reflected in the improvement of the properties of the soil between the piles. Therefore, it is necessary to evaluate the engineering effect of the lime-soil compaction pile composite foundation treatment and the design parameters under different working conditions, and to determine the parameters required for design and construction and the control requirements for construction quality. The test mainly includes three parts: review of the physical and mechanical properties of the natural foundation of the test site, determination of the pile construction technology and detection of the composite foundation. Among them, the review of the physical and mechanical properties of the natural foundation is to review the main physical and mechanical indexes such as water content, density, collapsibility coefficient, etc. to determine the representation. One of the contents is the compaction effect test: to test the compaction effect of the soil between the piles after the foundation treatment, to excavate a test well for sampling before and after the treatment in each test area to conduct on-site dry density test, and to calculate the compaction coefficient and other parameters. After excavating the test well in the soil between the piles, multiple cutting ring samples need to be taken from the side wall of the test well from top to bottom in layers at the specified position of each layer.

[0004] The technical problem commonly existing in the prior art is that: due to the limited distance between the piles, for example, the diameter of the pile body is 0.4m, the depth is 15m, and the distance between the piles is 0.8m, so the size of the test well excavated between the piles is limited, resulting in a small diameter of the test well. Therefore, the manual sampling method into the test well is very limited. In this narrow and deep well environment, workers need to go to the bottom of the well to take multiple samples on the annular side wall with a cutting ring, and need to reach different depth layers for sampling, so that the defects of the traditional sampling method are greatly magnified. SUMMARY

[0005] In view of the technical problems in the background art, the present application provides a compaction method foundation treatment inter-pile soil sampling device, which realizes the functions of well operation, automatic sampling, precise layering and multi-point sampling.

[0006] To achieve the above object, the technical scheme provided by the present application is as follows:

[0007] A compaction method foundation treatment inter-pile soil sampling device, comprising a cylinder, a conical cylinder, a positioning cylinder, a sampling cylinder and a cutter, the upper end of the cylinder is detachably connected with the conical cylinder, The cylinder has several guide holes evenly distributed around its circumference, and the positioning cylinder is slidably disposed in the guide holes; the cylinder is provided with a first driving mechanism for driving the positioning cylinder to slide along the guide holes. A sampling tube is slidably provided on the inner wall of the positioning cylinder. The sampling tube is detachably connected to the sliding sleeve. A second driving mechanism is provided inside the cylinder for driving the sampling tube to slide along the inner wall of the positioning cylinder. The cone has several guide blocks evenly distributed around its circumference, and each guide block has a groove inside. The cutter is slidably disposed in the groove. The bottom side of the cutter is arranged in correspondence with the sampling cylinder, and the cutter slides at an angle toward the sampling cylinder. A third drive mechanism is provided inside the cylinder to drive the cutter to slide along the inner wall of the groove. Several positioning cylinders extend out of the outer side of the cylinder and abut against the inner wall of the well. One end of the sampling cylinder has a pointed bevel. When the sampling cylinder is inserted into the inner wall of the well, the cutter is inserted into the soil at an angle downward and coincides with the pointed bevel to cut the soil sample in the sampling cylinder from the soil behind it.

[0008] Optionally, the cone is provided with a guide tube inside, and the bottom end of the guide tube is integrally provided with an installation tube, which is connected to the cylinder.

[0009] Optionally, the first driving mechanism includes a turntable and guide rollers. One end of the positioning cylinder is provided with a guide sleeve, and the bottom side of the guide sleeve is provided with a guide roller. The outer wall of the mounting cylinder is rotatably provided with a turntable. Several arc-shaped adjustment grooves are evenly distributed around the circumference of the turntable, and the adjustment grooves extend from the inner side of the turntable to the outer side of the turntable. The guide rollers are fitted into the adjustment grooves.

[0010] Optionally, the second driving mechanism includes a first slip ring and a first connecting rod. The first slip ring is slidably disposed on the outer wall of the guide cylinder, and a plurality of first connecting rods are circumferentially hinged to the first slip ring. An extension rod is integrally disposed at one end of the sliding sleeve, and a driving sleeve is disposed at the end of the extension rod. A first hinge joint is disposed at the upper end of the driving sleeve. A first guide groove is provided on the positioning cylinder, and the first hinge joint is slidably disposed in the first guide groove. The first hinge joint extends to the upper side of the positioning cylinder and is hinged to the first connecting rod.

[0011] Optionally, the third driving mechanism includes a second slip ring and a second connecting rod. The second slip ring is slidably disposed on the outer wall of the guide cylinder, and a plurality of second connecting rods are circumferentially hinged to the second slip ring. One end of the cutter is integrally provided with a driving block, which extends into the cone cylinder and extends downward at an angle. The driving block is hinged to the second connecting rod.

[0012] Optionally, when the cutter is inserted into the soil at an angle downwards and coincides with the inclined surface of its tip, the bottom side of the drive block abuts against the upper end of the first hinge joint.

[0013] Optionally, the mounting cylinder is internally equipped with a multi-stage hydraulic cylinder, which includes a cylinder body, a primary piston, a primary piston rod, a secondary piston, and a secondary piston rod. The primary piston is slidably mounted on the inner wall of the cylinder body, with one end connected to the primary piston rod. One end of the primary piston rod extends to the upper side of the cylinder body and is located inside the guide cylinder. A primary connecting block is provided at the end of the primary piston rod, extending to the outer side of the guide cylinder and connecting to a first slip ring. The secondary piston is slidably mounted on the inner wall of the primary piston rod, with one end connected to the secondary piston rod. One end of the secondary piston rod extends to the upper side of the primary piston rod and is located inside the guide cylinder. A secondary connecting block is provided at the end of the secondary piston rod, extending to the outer side of the guide cylinder and connecting to a second slip ring.

[0014] Optionally, a second guide groove is vertically provided on the guide cylinder, and the primary connecting block and the secondary connecting block are slidably disposed in the second guide groove.

[0015] Optionally, the outer end of the positioning cylinder is provided with a crimping ring, and the outer side of the crimping ring is provided with a cutter cylinder with an annular cut surface.

[0016] Optionally, the cylinder has several vertically distributed clearance grooves that communicate with the guide holes, and the clearance grooves are directly opposite the first connecting rod, the second connecting rod, and the drive block.

[0017] The present invention has the following advantages and beneficial effects: In this invention, a sampling device is lowered into wells at different depths using a winch system. Several positioning cylinders extend outwards from the outer side of a cylindrical core and press against the inner wall of the well to secure the sampling device. Then, the sampling cylinder is driven to insert into the inner wall of the well to perform the sampling operation. Simultaneously, a cutter is inserted obliquely downwards into the soil, aligning with its tip to cut the soil sample from the surrounding soil. This method allows for precise positioning and fixation of the sampling device, rapid sampling and cutting, and easy sample removal, significantly improving the efficiency of sampling inside the well.

[0018] Furthermore, by extending the positioning cylinder into the well to achieve primary stability and limiting fixation, and then using a cutter to tilt and insert into the soil to achieve secondary fixation, the overall stability of the sampling device is further enhanced, ensuring that the sampling cylinder is smoothly inserted into the soil for sampling. This structure balances sampling efficiency and sampling stability. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the sampling device of the present invention; Figure 2This is a front view of the sampling device of the present invention; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 This is a front view of the cutter, sampling cylinder, and positioning cylinder in the extended state of the multi-stage hydraulic cylinder of the present invention; Figure 5 This is a structural diagram of the cutter, sampling cylinder, and positioning cylinder in the extended state of the multi-stage hydraulic cylinder of the present invention; Figure 6 This is a schematic diagram illustrating how the positioning cylinder of the present invention extends to the outside of the cylinder to achieve primary positioning; Figure 7 This is a schematic diagram illustrating how the cutter of this invention extends to the outside of the cylinder to achieve secondary positioning. Figure 8 for Figure 7 A sectional view; Figure 9 This is a structural diagram of the cutter and sampling tube of the present invention, which are inserted into the soil to collect samples. Figure 10 for Figure 9 A sectional view; Figure 11 This is a structural diagram of the cutter, sampling cylinder, and positioning cylinder of the present invention in the retracted state of the multi-stage hydraulic cylinder; Figure 12 This is a front view of the cutter, sampling cylinder, and positioning cylinder in the retracted state of the multi-stage hydraulic cylinder of the present invention; Figure 13 This is a structural diagram of the multi-stage hydraulic cylinder, cutter, sampling cylinder, and positioning cylinder of the present invention; Figure 14 This is a cross-sectional view of the multi-stage hydraulic cylinder of the present invention; Figure 15 This is one of the structural diagrams of the cone-shaped cylinder of the present invention; Figure 16 This is the second structural diagram of the cone-shaped cylinder of the present invention; Figure 17 This is a cross-sectional view of the cone-shaped cylinder of the present invention; Figure 18 This is a structural diagram of the cylinder of the present invention; Figure 19 This is a cross-sectional view of the cylinder of the present invention; Figure 20 This is a structural diagram of the turntable of the present invention; Figure 21 This is a front view of the turntable of the present invention; Figure 22 This is a structural diagram of the positioning cylinder of the present invention; Figure 23 This is a structural diagram of the sampling cylinder of the present invention; Figure 24 This is a structural diagram of the cutter and drive block of the present invention.

[0020] Reference numerals: 1-Conical cylinder, 11-Guide block, 12-Slide groove, 121-Through groove, 13-Assembly groove, 14-Second connecting hole, 15-Guide cylinder, 151-Second guide groove, 16-Mounting cylinder, 17-First flange, 18-Lifting lug, 2-Cylinder, 21-Mounting groove, 22-Guide hole, 23-Receiving hole, 24-Allowing groove, 25-First connecting hole, 26-Connecting cylinder, 27-Drive motor, 28-Second gear, 29-Support column, 3-Turntable, 31-Adjusting groove, 32-First gear, 33-Hollow shaft, 4-Positioning cylinder, 41-Cutter cylinder, 42-Crimping ring, 43-First guide groove, 44-Guide sleeve, 45-Guide roller, 5-Sampling cylinder 51-Accurate bevel, 52-Sliding sleeve, 53-Extended rod, 54-Drive sleeve, 55-First hinge joint, 56-Drive block, 561-First hinge hole, 57-Cutter, 58-First connecting rod, 59-Second connecting rod, 6-Cylinder body, 6a-Main oil inlet, 6b-Main oil outlet, 61-First stage piston rod, 611-First stage piston, 612-Axial oil hole, 613-Jack cavity, 614-Outer layer oil passage hole, 615-Inner layer oil passage hole, 62-First stage connecting block, 63-Second stage piston rod, 631-Second stage piston, 64-Second stage connecting block, 65-First slip ring, 651-Second hinge hole, 66-Second slip ring, 661-Third hinge hole, 67-Second flange. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, but not all embodiments.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] Example like Figures 1-24 As shown, a soil sampling device for compaction foundation treatment between piles includes components such as a cylindrical cylinder 2, a conical cylinder 1, a positioning cylinder 4, a sampling cylinder 5, and a cutter 57.

[0024] like Figure 3 , Figures 15-18As shown, the upper end of the cylinder 2 is detachably connected to the cone cylinder 1. Specifically, the bottom circumference of the cone cylinder 1 is evenly distributed with several second connecting holes 14, and the outer circumference of the cone cylinder 1 is evenly distributed with several mounting grooves 13, which are respectively set to correspond to the second connecting holes 14. The upper circumference of the cylinder 2 is evenly distributed with several first connecting holes 25, and the number of first connecting holes 25 is the same as the number of second connecting holes 14. When the bottom side of the cone cylinder 1 is attached to the upper end face of the cylinder 2, the first connecting holes 25 and the second connecting holes 14 are aligned, a screw is inserted into the mounting groove 13, and the screw is passed through the first connecting holes 25 and the second connecting holes 14 to achieve the connection between the cylinder 2 and the cone cylinder 1.

[0025] like Figures 1-10 , Figure 18 and Figure 19 As shown, the cylinder 2 has an installation groove 21 inside, and several guide holes 22 communicating with the installation groove 21 are evenly distributed around the circumference of the cylinder 2. The positioning cylinder 4 is slidably disposed in the guide holes 22. The cylinder 2 is provided with a first driving mechanism for driving the positioning cylinder 4 to slide along the guide holes 22. The positioning cylinder 4 can be housed in the guide holes 22, or it can extend outward through the guide holes 22 to the outside of the cylinder 2. By using several positioning cylinders 4 extending outward, they can be pressed against the side wall of the exploration well for fixation.

[0026] like Figures 1-10 , Figure 13 , Figure 18 , Figure 19 , Figure 22 and Figure 23 As shown, a sampling cylinder 5 is slidably mounted on the inner wall of the positioning cylinder 4. The sampling cylinder 5 is detachably connected to the sliding sleeve 52, facilitating separation of the sampling cylinder 5 and the sliding sleeve 52 after sampling. A second driving mechanism is provided inside the cylinder 2 to drive the sampling cylinder 5 to slide along the inner wall of the positioning cylinder 4. The sampling cylinder 5 can be housed within the positioning cylinder 4, or it can extend out of the positioning cylinder 4 and be inserted into the soil for sampling.

[0027] like Figures 1-10 , Figures 15-19 As shown, the cone 1 has several guide blocks 11 evenly distributed around its circumference. Each guide block 11 has a groove 12 inside, and a cutter 57 is slidably disposed within the groove 12. The bottom sides of the cutters 57 correspond one-to-one with the sampling tubes 5. The number of cutters 57 is the same as the number of sampling tubes 5. The cutters 57 slide downwards towards the sampling tubes 5. A third driving mechanism is provided inside the cylinder 2 to drive the cutters 57 to slide along the inner wall of the groove 12. The cutters 57 can be housed in the groove 12, or they can slide out through the groove 12 and be inserted into the soil for fixation and cutting of the sample at the end of the sampling tube 5.

[0028] Several positioning cylinders 4 extend synchronously to the outside of the cylinder 2 and press against the inner wall of the well. One end of the sampling cylinder 5 is provided with a pointed inclined surface 51. When the sampling cylinder 5 is inserted into the inner wall of the well, the cutter 57 is inserted into the soil body at an angle downward and coincides with the pointed inclined surface 51 to cut the soil sample in the sampling cylinder 5 from the soil body behind it.

[0029] like Figure 1 , Figure 3 , Figure 4 , Figure 16 , Figure 18 and Figure 19 As shown, at this time, the positioning cylinder 4 is housed in the guide hole 22 of the cylinder 2, the sampling cylinder 5 is housed inside the positioning cylinder 4, and the cutter 57 is housed in the slide groove 12.

[0030] like Figure 15 As shown, the upper end of the cone 1 is provided with a lifting lug 18, and the entire sampling device can be lowered into the exploration well using a winch.

[0031] like Figure 6 As shown, when the sampling device is lowered into the well to the sampling depth, the positioning cylinder 4 is first controlled to extend to the outside of the cylinder 2 so that the positioning cylinder 4 abuts against the inner wall of the well, which is the first-level limit fixation, and the entire sampling device is centered and fixed.

[0032] like Figure 7 and Figure 8 As shown, after the positioning cylinder 4 abuts against the inner wall of the well, the control cutter 57 extends downward and is inserted into the inner wall of the well at an angle, providing secondary reinforcement and further strengthening the fixation of the entire sampling device. Through the dual fixation of the cutter 57 and the positioning cylinder 4, the sampling device is stably fixed on the inner wall of the well.

[0033] like Figures 9-12 , Figure 23 As shown, the cutter 57 and sampling cylinder 5 are then driven synchronously. The cutter 57 continues to be inserted into the soil at an angle, while the sampling cylinder 5 is inserted horizontally into the soil until the upper tip slope 51 of the sampling cylinder 5 contacts the cutter 57, thus cutting the soil sample inside the sampling cylinder 5 from the soil behind it. After sampling is completed, the cutter 57 and sampling cylinder 5 retract synchronously to reset. This method can achieve positioning and fixation of the sampling device, and quickly perform sampling and cutting, facilitating sample removal and greatly improving the efficiency of sampling inside the well. Furthermore, under the premise of achieving primary stable limiting and fixation by extending the positioning cylinder 4 into the well, the secondary fixation is achieved by using the cutter 57 to be inserted into the soil at an angle, further enhancing the stability of the overall sampling device and ensuring that the sampling cylinder 5 is smoothly inserted into the soil for sampling and smoothly removed from the soil. This structure balances sampling efficiency and sampling stability.

[0034] like Figures 1-10 , Figures 15-19As shown, a guide cylinder 15 is provided inside the cone cylinder 1, and a mounting cylinder 16 is integrally provided at the bottom end of the guide cylinder 15. The inner diameter of the mounting cylinder 16 is larger than the outer diameter of the guide cylinder 15, and the mounting cylinder 16 is connected to the cylinder 2. Specifically, a connecting cylinder 26 communicating with the mounting groove 21 is provided at the bottom end of the cylinder 2. The mounting cylinder 16 is close to the inner wall of the connecting cylinder 26 and extends to the bottom side of the connecting cylinder 26. A first flange 17 is provided at the end of the mounting cylinder 16, and the first flange 17 is connected to the connecting cylinder 26 by screws. The guide cylinder 15 and the mounting cylinder 16 further enhance the connection strength between the cone cylinder 1 and the cylinder 2.

[0035] like Figures 1-24 As shown, the first driving mechanism includes a turntable 3 and guide rollers 45. A guide sleeve 44 is provided at one end of the positioning cylinder 4, and a guide roller 45 is provided on the bottom side of the guide sleeve 44. The turntable 3 is rotatably mounted on the outer wall of the mounting cylinder 16, and a hollow shaft 33 is provided on the bottom side of the turntable 3, which is sleeved on the outer wall of the mounting cylinder 16. Several arc-shaped adjustment grooves 31 are evenly distributed around the circumference of the turntable 3, extending from the inner side to the outer side of the turntable 3. The guide rollers 45 are fitted into the adjustment grooves 31. When the turntable 3 rotates, it drives the guide rollers 45 to slide, thereby realizing the telescopic movement of the positioning cylinder 4.

[0036] like Figure 8 , Figure 19 and Figure 20 As shown, in this invention, a drive motor 27 is provided on the bottom side of the cylinder 2, and a second gear 28 is connected to the output shaft of the drive motor 27. A first gear 32 is integrally provided on the outer side of the turntable 3. The second gear 28 and the first gear 32 mesh, and the drive motor 27 controls the rotation of the turntable 3.

[0037] In this invention, a support column 29 is provided on the bottom side of the cylinder 2 to facilitate the support and placement of the overall sampling device.

[0038] like Figures 1-24 As shown, the second driving mechanism includes a first slip ring 65 and a first connecting rod 58. The first slip ring 65 is slidably disposed on the outer wall of the guide cylinder 15. Several first connecting rods 58 are hinged to the circumference of the first slip ring 65 through a second hinge hole 651. An extension rod 53 is integrally disposed at one end of the sliding sleeve 52, and a driving sleeve 54 is disposed at the end of the extension rod 53. The driving sleeve 54 and the sliding sleeve 52 are slidably disposed on the inner wall of the positioning cylinder 4. A first hinge joint 55 is disposed at the upper end of the driving sleeve 54. A first guide groove 43 is provided on the positioning cylinder 4. The first hinge joint 55 is slidably disposed in the first guide groove 43 to realize the limiting sliding of the sampling cylinder 5. The first hinge joint 55 extends to the upper side of the positioning cylinder 4 and is hinged to the first connecting rod 58. When the first slip ring 65 moves up and down along the guide cylinder 15, it drives the sampling cylinder 5 to move telescopically along the inner wall of the positioning cylinder 4.

[0039] likeFigures 1-24 As shown, the third drive mechanism includes a second slip ring 66 and a second connecting rod 59. The second slip ring 66 is slidably disposed on the outer wall of the guide cylinder 15, and is located above the first slip ring 65, with a fixed distance between them. Several second connecting rods 59 are hinged to the circumference of the second slip ring 66 through a third hinge hole 661. A drive block 56 is integrally disposed at one end of the cutter 57. Several through grooves 121 communicating with the slide groove 12 are evenly distributed on the circumference of the inner wall of the cone cylinder 1. The drive block 56 is slidably disposed in the through grooves 121, extends into the cone cylinder 1 and extends downward at an angle. The bottom side of the drive block 56 is hinged to the second connecting rod 59 through a first hinge hole 561. When the second slip ring 66 moves up and down along the guide cylinder 15, it drives the cutter 57 to extend and retract along the inner wall of the slide groove 12.

[0040] like Figures 10-13 , Figure 23 As shown, further, when the cutter 57 is inserted into the soil at an angle and coincides with the tip slope 51, the bottom side of the drive block 56 abuts against the upper end of the first hinge joint 55 to achieve a limiting fixation. The drive block 56 limits the first hinge joint 55, restricting the further movement of the sampling cylinder 5 after it is in place, and avoiding excessive contact between the sampling cylinder 5 and the cutter 57, which could damage the cutter 57.

[0041] In this invention, the first slip ring 65 and the second slip ring 66 are driven by the same driving component, which achieves a compact structure design and sequential motion control.

[0042] like Figures 1-24 As shown, the mounting cylinder 16 is equipped with a multi-stage hydraulic cylinder, which includes a cylinder body 6, a primary piston 611, a primary piston rod 61, a secondary piston 631, and a secondary piston rod 63. The primary piston 611 is slidably mounted on the inner wall of the cylinder body 6. One end of the primary piston 611 is connected to the primary piston rod 61, and one end of the primary piston rod 61 extends to the upper side of the cylinder body 6 and is located inside the guide cylinder 15. A primary connecting block 62 is provided at the end of the primary piston rod 61, and the primary connecting block 62 extends to the outer side of the guide cylinder 15 and is connected to the first slip ring 65. The secondary piston 631 is slidably mounted on the inner wall of the primary piston rod 61. One end of the secondary piston 631 is connected to the secondary piston rod 63, and one end of the secondary piston rod 63 extends to the upper side of the primary piston rod 61 and is located inside the guide cylinder 15. A secondary connecting block 64 is provided at the end of the secondary piston rod 63, and the secondary connecting block 64 extends to the outer side of the guide cylinder 15 and is connected to the second slip ring 66. The two-stage telescopic motion enables progressive telescopic drive control. When extending, the first-stage piston rod 61 extends synchronously with the second-stage piston rod 63. The second-stage piston rod 63 extends only after the first-stage piston rod 61 has extended to its full position. The retraction is the opposite: the second-stage piston rod 63 retracts first. After the second-stage piston rod 63 has retracted to its full position, the second-stage piston rod 63 and the first-stage piston rod 61 retract synchronously.

[0043] like Figure 14 As shown, the cylinder body 6 has a main oil inlet 6a at the bottom and a main oil outlet 6b on one side of the upper end. A first-stage piston 611 is slidably disposed inside the cylinder body 6. An axial oil hole 612 is provided through the first-stage piston 61. An interlayer cavity 613 is provided inside the first-stage piston rod 61 for oil passage. An outer oil passage hole 614 communicating with the inner cavity of the cylinder body 6 is provided on the outer side of the interlayer cavity 613 near the first-stage piston 611. An inner oil passage hole 615 communicating with the inner cavity of the first-stage piston rod 61 is provided on the inner side of the interlayer cavity 613 away from the first-stage piston 611.

[0044] like Figure 14 As shown, when the secondary hydraulic cylinder is fully retracted, the end of the secondary piston rod 63 extends to the outside of the primary piston rod 61, ensuring that the first slip ring 65 and the second slip ring 66 are separated by a fixed distance.

[0045] When oil enters through the main oil inlet 6a, it pushes the first-stage piston rod 61 and the second-stage piston rod 63 to extend synchronously. After the first-stage piston rod 61 extends to its full position, the second-stage piston rod 63 continues to extend. During retraction, oil enters through the main oil outlet 6b, pushing the second-stage piston rod 63 to retract. After the second-stage piston rod 63 retracts to its full position, the second-stage piston rod 63 and the first-stage piston rod 61 retract synchronously.

[0046] In this invention, a second flange 67 is provided on the bottom side of the cylinder body 6. During installation, the first flange 17 is tightly attached to the end face of the connecting cylinder 26, and the second flange 67 is tightly attached to the first flange 17. Then, the cylinder body 6, the mounting cylinder 16 and the connecting cylinder 26 can be stably connected as one unit by screws.

[0047] Furthermore, a second guide groove 151 is vertically provided on the guide cylinder 15, and the primary connecting block 62 and the secondary connecting block 64 are slidably disposed in the second guide groove 151 to achieve sliding limit of the two.

[0048] Furthermore, a crimping ring 42 is provided at the outer end of the positioning cylinder 4, and a cutter cylinder 41 with an annular cross-section is provided on the outer side of the crimping ring 42. When the sampling cylinder 5 is fixed, the positioning cylinder 4 extends outward, and the cutter cylinder 41 is inserted into the soil inside the well wall until the crimping ring 42 is tightly attached to the inner wall of the well, further enhancing the overall connection strength and preventing the positioning cylinder 4 from being excessively inserted into the soil. A receiving hole 23 is provided outside the guide hole 22, and the diameter of the receiving hole 23 is larger than the diameter of the guide hole 22, ensuring that the crimping ring 42 can be accommodated.

[0049] Furthermore, the cylinder 2 has several vertically evenly distributed clearance grooves 24 communicating with the guide holes 22. These clearance grooves 24 are directly opposite the first connecting rod 58, the second connecting rod 59, and the driving block 56. The clearance grooves 24 are used to avoid collisions and interference with the first connecting rod 58, the second connecting rod 59, and the driving block 56.Figure 10 As shown, at this time, the sampling tube 5 extends out of the soil to take a sample, and the cutter 57 is also inserted into the soil to cut the soil sample in the sampling tube 5 from the soil body. The drive block 56 moves downward and abuts against the first hinge joint 55 to achieve a limit. At this time, the first connecting rod 58, the second connecting rod 59 and the drive block 56 are partially accommodated in the clearance groove 24.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A soil sampling device for pile compaction method foundation treatment, characterized in that: It includes a cylinder, a conical cylinder, a positioning cylinder, a sampling cylinder, and a cutter, wherein the upper end of the cylinder is detachably connected to the conical cylinder. The cylinder has several guide holes evenly distributed around its circumference, and the positioning cylinder is slidably disposed in the guide holes; the cylinder is provided with a first driving mechanism for driving the positioning cylinder to slide along the guide holes. A sampling tube is slidably provided on the inner wall of the positioning cylinder. The sampling tube is detachably connected to the sliding sleeve. A second driving mechanism is provided inside the cylinder for driving the sampling tube to slide along the inner wall of the positioning cylinder. The cone has several guide blocks evenly distributed around its circumference, and each guide block has a groove inside. The cutter is slidably disposed in the groove. The bottom side of the cutter is arranged in correspondence with the sampling cylinder, and the cutter slides at an angle toward the sampling cylinder. A third drive mechanism is provided inside the cylinder to drive the cutter to slide along the inner wall of the groove. Several positioning cylinders extend out of the outer side of the cylinder and abut against the inner wall of the well. One end of the sampling cylinder has a pointed bevel. When the sampling cylinder is inserted into the inner wall of the well, the cutter is inserted into the soil at an angle downward and coincides with the pointed bevel to cut the soil sample in the sampling cylinder from the soil behind it.

2. The soil sampling device between piles for compaction foundation treatment according to claim 1, characterized in that: The cone has a guide tube inside, and the bottom end of the guide tube is integrally provided with an installation tube, which is connected to the cylinder.

3. The soil sampling device between piles for compaction foundation treatment according to claim 2, characterized in that: The first driving mechanism includes a turntable and guide rollers. One end of the positioning cylinder is provided with a guide sleeve, and the bottom side of the guide sleeve is provided with a guide roller. The outer wall of the mounting cylinder is rotatably provided with a turntable. Several arc-shaped adjustment grooves are evenly distributed around the circumference of the turntable, and the adjustment grooves extend from the inner side of the turntable to the outer side of the turntable. The guide rollers are fitted into the adjustment grooves.

4. The soil sampling device between piles for compaction foundation treatment according to claim 2, characterized in that: The second driving mechanism includes a first slip ring and a first connecting rod. The first slip ring is slidably disposed on the outer wall of the guide cylinder, and a plurality of first connecting rods are hinged to the circumference of the first slip ring. An extension rod is integrally disposed at one end of the sliding sleeve, and a driving sleeve is disposed at the end of the extension rod. A first hinge joint is disposed at the upper end of the driving sleeve. A first guide groove is provided on the positioning cylinder, and the first hinge joint is slidably disposed in the first guide groove. The first hinge joint extends to the upper side of the positioning cylinder and is hinged to the first connecting rod.

5. The soil sampling device between piles for compaction foundation treatment according to claim 4, characterized in that: The third driving mechanism includes a second slip ring and a second connecting rod. The second slip ring is slidably disposed on the outer wall of the guide cylinder, and a plurality of second connecting rods are circumferentially hinged to the second slip ring. One end of the cutter is integrally provided with a driving block, which extends into the cone cylinder and extends downward at an angle. The driving block is hinged to the second connecting rod.

6. The soil sampling device between piles for compaction foundation treatment according to claim 5, characterized in that: When the cutter is inserted into the soil at an angle downwards and coincides with the inclined surface of its tip, the bottom side of the drive block abuts against the upper end of the first hinge joint.

7. The soil sampling device between piles for compaction foundation treatment according to claim 5, characterized in that: The mounting cylinder is internally equipped with a multi-stage hydraulic cylinder, which includes a cylinder body, a primary piston, a primary piston rod, a secondary piston, and a secondary piston rod. The primary piston is slidably mounted on the inner wall of the cylinder body. One end of the primary piston is connected to the primary piston rod, and one end of the primary piston rod extends to the upper side of the cylinder body and is located inside the guide cylinder. A primary connecting block is provided at the end of the primary piston rod, and the primary connecting block extends to the outer side of the guide cylinder and is connected to a first slip ring. The secondary piston is slidably mounted on the inner wall of the primary piston rod. One end of the secondary piston is connected to the secondary piston rod, and one end of the secondary piston rod extends to the upper side of the primary piston rod and is located inside the guide cylinder. A secondary connecting block is provided at the end of the secondary piston rod, and the secondary connecting block extends to the outer side of the guide cylinder and is connected to a second slip ring.

8. The soil sampling device between piles for compaction foundation treatment according to claim 7, characterized in that: The guide cylinder has a second guide groove vertically formed, and the primary connecting block and the secondary connecting block are slidably disposed in the second guide groove.

9. The soil sampling device between piles for compaction foundation treatment according to claim 1, characterized in that: The outer end of the positioning cylinder is provided with a crimping ring, and the outer side of the crimping ring is provided with a cutter cylinder with an annular cut surface.

10. The soil sampling device between piles for compaction foundation treatment according to claim 5, characterized in that: The cylinder has several vertically distributed clearance grooves that communicate with the guide holes, and the clearance grooves are directly opposite the first connecting rod, the second connecting rod, and the drive block.

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