A drilling device and construction method for geotechnical investigation

Abstract

The present application relates to a drilling device and a construction method for geotechnical investigation, belonging to the technical field of geotechnical investigation. It includes a drill pipe on a base, the top of the drill pipe is rotatably connected to a support plate, the top of the base is fixedly provided with a top plate, a driving assembly for driving the drill pipe to drill holes is arranged between the support plate and the top plate, a jacking assembly is arranged between the base and the support plate, a plurality of sampling assemblies for sampling soils at different depths are arranged on the drill pipe, the plurality of sampling assemblies are arranged on the drill pipe in the vertical direction, and a linkage assembly is arranged between the sampling assembly and the driving assembly. After the drilling is completed, there is no need for workers to use additional instruments to sample the soil, the operation is convenient, and the device can take soils at different depths, so as to make the soil quality detection more accurate.

Description

Technical Field

[0001] This application relates to the field of geotechnical investigation, and in particular to a drilling device and construction method for geotechnical investigation. Background Art

[0002] The task of geotechnical engineering investigation is to correctly reflect the engineering geological conditions of the site and the influence of the geotechnical properties according to the requirements of different investigation stages, and combine with the specific requirements of engineering design, construction conditions, and foundation treatment and other projects to conduct technical demonstration and evaluation, submit specific suggestions for handling geotechnical engineering problems and solving problems, and put forward design criteria for projects such as foundations and slopes and guiding opinions for geotechnical engineering construction, so as to provide a basis for design and construction and serve the whole process of engineering construction.

[0003] The drilling device for geotechnical engineering investigation is widely used in the field of geotechnical engineering investigation and plays an important role in geotechnical engineering investigation.

[0004] At present, in related technologies, a drilling device includes a motor and a drill pipe, and the drill pipe is coaxially fixed with the rotating shaft of the motor. When in use, the device is moved to the punching place, and then the motor is started to drive the drill pipe to punch holes into the ground; after the drilling is completed, the staff conducts the investigation.

[0005] In the process of realizing this application, the inventor found that there are at least the following problems in this technology: after the drilling is completed, the staff needs additional instruments to take soil samples at different depths, and the steps are cumbersome, resulting in low efficiency in detecting the soil quality subsequently, so it needs to be improved. Summary of the Invention

[0006] In order to improve the problem of low efficiency in detecting the soil quality subsequently caused by the cumbersome steps of taking soil samples, this application provides a drilling device and construction method for geotechnical investigation.

[0007] In a first aspect, a drilling device for geotechnical investigation provided by this application adopts the following technical solution:

[0008] A drilling device for geotechnical investigation includes a drill pipe arranged on a base, a support plate is rotatably connected to the top of the drill pipe, a top plate is fixedly arranged on the top of the base, a driving component for driving the drill pipe to drill holes is arranged between the support plate and the top plate, a lifting component is arranged between the base and the support plate, a plurality of sampling components for taking soil samples at different depths are arranged on the drill pipe, the plurality of sampling components are arranged on the drill pipe in the vertical direction, and a linkage component is arranged between the sampling component and the driving component.

[0009] By adopting the above technical solution, when geotechnical exploration is required, the device is moved to the required drilling location, and then the driving component is activated to drive the drill rod to rotate and move vertically downward to drill the ground; when the drilling is about to be completed, the driving component is lifted by the lifting component to be connected to the linkage component, so that the drill rod stops rotating, and the driving component will drive the linkage component to operate, and the operation of the linkage component will drive the sampling component to extend into the soil layer to sample the soil. After the drilling is completed, there is no need for workers to use additional instruments to sample the soil, which is convenient to operate, and the device can sample soils at different depths, so as to make the soil quality detection more accurate.

[0010] Optionally, the driving component includes a driving motor, a cylinder, a driving rod, a driving gear and a driven gear. The driving motor is arranged on the support plate, and the rotating shaft of the driving motor is coaxially fixed with the driving gear. The body of the cylinder is fixedly connected to the top plate, and the push rod of the cylinder is fixedly connected to the support plate. The driving rod penetrates through the support plate and is coaxially fixed with the drill rod. The driven gear is coaxially fixed with the driving rod and meshes with the driving gear.

[0011] By adopting the above technical solution, when drilling is required, the cylinder is activated to drive the drill rod to move towards the ground. At the same time, the driving motor is activated to drive the driving gear to rotate, and the rotation of the driving gear will successively drive the driven gear, the driving rod and the drill rod to rotate, so that the ground can be drilled quickly, and then it is convenient to conduct subsequent geotechnical exploration.

[0012] Optionally, the lifting component includes a sliding plate, a guiding rod and a jacking rod. The sliding plate is arranged on the top of the support plate. The guiding rod is fixed on the top of the support plate and penetrates through the sliding plate. The jacking rod is fixed on the top wall of the base, and when the drilling of the drill rod is completed, the jacking rod abuts against the sliding plate.

[0013] By adopting the above technical solution, when the drilling is about to be completed, the top wall of the jacking rod will abut against the bottom walls of the two ends of the sliding plate extending out of the support plate. As the cylinder pushes the drill rod to continue to move downward, the jacking rod will lift the sliding plate. At this time, the driving gear is separated from the driven gear and connected to the linkage component, so that the operation of the linkage component will drive the sampling component to extend into the soil layer to sample the soil.

[0014] Optionally, the linkage assembly includes a transmission rod, a connecting rod, a first gear, a second gear and a third gear. A accommodating chamber is provided inside the drill rod. The transmission rod is rotatably connected to the inner wall of the accommodating chamber and the transmission rod passes through the inner wall of the accommodating chamber. The connecting rod is rotatably connected to the top of the support plate and one end of the connecting rod is coaxially fixed with the first gear and the other end is coaxially fixed with the second gear. When the drill rod is completed drilling, the first gear is meshed with the driving gear, the third gear is coaxially fixed with one end of the transmission rod located at the top of the support plate and the third gear is meshed with the second gear, and one end of the transmission rod located in the accommodating chamber is connected to the sampling assembly.

[0015] By adopting the above technical solution, when the driving gear is separated from the driven gear and moves toward the first gear and meshes with the first gear, the rotation of the driving gear will drive the rotation of the first gear, the connecting rod, the second gear, the third gear and the transmission rod in sequence, and the rotation of the transmission rod will drive the sampling assembly to extend into the soil layer to sample the soil.

[0016] Optionally, the sampling assembly includes a sampling barrel, a connecting block, a screw, a fourth gear and a fifth gear. A accommodating hole is provided on the side wall of the drill rod and the accommodating hole is communicated with the accommodating cavity. The sampling barrel is inserted into the accommodating hole. The connecting block is fixedly connected to one end of the sampling barrel located in the accommodating cavity. A threaded hole is provided on the side wall of the connecting block. One end of the screw is threadedly connected to the threaded hole and the other end is coaxially fixed with the fifth gear. One end of the transmission rod located in the accommodating cavity is coaxially fixed with the fourth gear and the fourth gear is meshed with the fifth gear.

[0017] By adopting the above technical solution, when the transmission rod rotates, the rotation of the transmission rod will drive the fourth gear, the fifth gear and the screw to rotate in sequence, and the rotation of the screw will drive the connecting block to drive the sampling tube to extend into the soil layer to sample the soil.

[0018] Optionally, a soil-breaking blade is fixedly provided on the side wall of the sampling tube on the side facing away from the connecting block, and the cross-section of the soil-breaking blade is triangular.

[0019] By adopting the above technical solution, the soil-breaking blade makes it easier for the sampling tube to extend into the soil layer to sample the soil.

[0020] Optionally, a soil retaining assembly is provided inside the end of the sampling tube away from the connecting block, and when the sampling tube extends into the soil layer, the soil retaining assembly opens the sampling tube; when the sampling tube is retracted into the accommodating hole, the soil retaining assembly closes the sampling tube.

[0021] By adopting the above technical solution, when the sampling cylinder extends into the soil layer for soil sampling, the soil retaining assembly will automatically open the sampling cylinder, facilitating the entry of soil into the sampling cylinder; when the sampling cylinder is retracted into the receiving hole, the soil retaining assembly will automatically close the sampling cylinder, preventing the soil in the sampling cylinder from easily falling out of the sampling cylinder.

[0022] Optionally, the soil retaining assembly includes a baffle plate, a rotating rod, and a torsion spring. The rotating rod is rotatably connected to the inner wall of the sampling cylinder. The baffle plate is sleeved on the rotating rod through a bushing. The torsion spring is also sleeved on the rotating rod, with one end abutting against the baffle plate and the other end abutting against the inner wall of the sampling cylinder.

[0023] By adopting the above technical solution, when the sampling cylinder extends into the soil layer for soil sampling, the soil will squeeze the baffle plate until the baffle plate flips open towards the bottom side of the sampling cylinder. At this time, the torsion spring deforms and stores energy, facilitating the entry of soil into the sampling cylinder; when the sampling cylinder is retracted, the torsion spring will restore its deformation, causing the baffle plate to automatically flip to the closed state of the sampling cylinder, preventing the soil in the sampling cylinder from easily falling out of the sampling cylinder.

[0024] Optionally, a push plate is inserted inside the sampling cylinder, and the push plate can slide horizontally. A spring is arranged inside the sampling cylinder, with one end fixedly connected to the push plate and the other end fixedly connected to the inner wall of the sampling cylinder.

[0025] By adopting the above technical solution, after the soil enters the sampling cylinder, the soil will push the push plate. At this time, the push plate moves towards the bottom of the sampling cylinder through the deformation of the spring. Then, after the drill rod is retracted above the ground, the staff opens the baffle plate, and the push plate moves towards the opening of the sampling cylinder through the elastic force of the spring. At this time, the soil will be pushed out of the sampling cylinder, eliminating the need for the staff to reach into the sampling cylinder to pick up the soil, making the operation convenient.

[0026] In a second aspect, the present application provides a construction method for a drilling device for geotechnical investigation, adopting the following technical solution:

[0027] A construction method for a drilling device for geotechnical investigation:

[0028] S1. Move the drilling device to the required drilling location;

[0029] S2. Start the driving motor to drive the drill rod to rotate; meanwhile, start the air cylinder to push the drill rod towards the ground to drill a hole in the ground;

[0030] S3. After drilling is completed, turn off the air cylinder, and through the abutment of the ejector rod and the slide plate, the slide plate will drive the driving motor to slide upward until the driving gear meshes with the first gear;

[0031] S4. The rotation of the first gear will drive the rotation of the connecting rod, the second gear, the third gear, the transmission rod, the fourth gear, the fifth gear and the screw in sequence. The rotation of the screw will push the sampling tube into the soil layer to sample the soil;

[0032] S5, the staff controls the driving motor to reverse, so as to recycle the sampling tube;

[0033] S6, start the cylinder to recover the drill pipe;

[0034] S7. The staff takes out the soil in the sampling tube and conducts soil quality testing.

[0035] By adopting the above technical solution, the soil can be sampled while the hole is drilled in the ground, without the need for workers to use other instruments to sample the soil, and the operation is convenient.

[0036] In summary, the present application includes at least one of the following beneficial effects:

[0037] 1. When geotechnical survey is required, move the device to the required drilling location, and then start the drive assembly to drive the drill rod to rotate and move vertically downward to drill the ground; when the drilling is about to be completed, the drive assembly is jacked up by the jacking assembly to connect with the linkage assembly, so that the drill rod no longer rotates, and the drive assembly will drive the linkage assembly to operate, and the operation of the linkage assembly will drive the sampling assembly to extend into the soil layer to sample the soil. After the drilling is completed, the device does not require workers to use other instruments to sample the soil. The operation is convenient, and the device can take soil at different depths, so that the soil quality detection is more accurate.

[0038] 2. When the sampling tube is extended into the soil layer for soil sampling, the soil retaining assembly will automatically open the sampling tube, thereby facilitating the entry of soil into the sampling tube; when the sampling tube is retracted into the receiving hole, the soil retaining assembly will automatically close the sampling tube, thereby preventing the soil in the sampling tube from falling out of the sampling tube.

[0039] 3. The soil-breaking blade makes it easier for the sampling tube to extend into the soil layer to sample the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0041] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0042] Figure 3 This is a schematic diagram of the structure of the sampling assembly in the embodiment of the present application;

[0043] Figure 4 for Figure 3A partial enlarged view of point B in the middle;

[0044] Figure 5 It is a schematic diagram of the structure of the retaining assembly used to reflect the embodiment of the present application.

[0045] In the figure: 1. base; 11. clearance hole; 12. support plate; 13. top plate; 2. drill rod; 21. accommodating chamber; 22. accommodating hole; 3. driving assembly; 31. driving motor; 32. cylinder; 33. driving gear; 34. driven gear; 35. driving rod; 4. lifting assembly; 41. slide plate; 42. guide rod; 43. push rod; 5. linkage assembly; 51. transmission rod; 52. connecting rod; 53. first gear; 54. second gear; 55. third gear; 6. sampling assembly; 61. sampling tube; 611. earth-breaking blade; 62. connecting block; 621. threaded hole; 63. screw; 64. fourth gear; 65. fifth gear; 7. soil retaining assembly; 71. baffle; 72. rotating rod; 73. torsion spring; 8. push plate; 81. spring. DETAILED DESCRIPTION

[0046] The following is combined with Figures 1-5 This application is described in further detail.

[0047] The present application embodiment discloses a drilling device for geotechnical investigation. Figure 1 A drilling device for geotechnical investigation includes a drill rod 2 arranged on a base 1, and a clearance hole 11 is formed through the top wall at the center of the base 1, and the diameter of the clearance hole 11 is larger than the width of the drill rod 2, and the clearance hole 11 facilitates the drill rod 2 to move downward to drill holes in the ground. The top of the drill rod 2 is rotatably connected to a support plate 12 through a bearing, and a top plate 13 is fixedly provided on the top of the base 1 through a rod body, and the top plate 13 is located above the support plate 12, and a driving assembly 3 is provided between the support plate 12 and the top plate 13. When geotechnical investigation is required, the device is moved to the desired drilling location, and then the driving assembly 3 is started to drive the drill rod 2 to rotate and move vertically downward to drill holes in the ground, thereby facilitating subsequent geotechnical investigation.

[0048] Reference Figure 1 and 2, the driving assembly 3 includes a driving motor 31, a cylinder 32, a driving rod 35, a driving gear 33 and a driven gear 34. The driving rod 35 passes through the center of the top wall of the support plate 12 and is coaxially fixed to the top wall of the drill rod 2, and the driving rod 35 can rotate. The driving motor 31 is arranged on the support plate 12, and the rotating shaft of the driving motor 31 is coaxially fixed to the driving gear 33. One end of the driving rod 35 above the support plate 12 is coaxially fixed to the driven gear 34, and the driving gear 33 meshes with the driven gear 34. The body of the cylinder 32 passes through the top wall of the top plate 13 and is fixedly connected to the top plate 13. In the embodiment of the present application, there are two cylinders 32, and the push rod of the cylinder 32 is fixedly connected to the top wall of the support plate 12. When drilling is required, the cylinder 32 is started to drive the drill rod 2 to move towards the ground. At the same time, the driving motor 31 is started to drive the driving gear 33 to rotate. The rotation of the driving gear 33 will sequentially drive the driven gear 34, the driving rod 35 and the drill rod 2 to rotate, so that the ground can be drilled quickly, and then it is convenient to conduct geotechnical exploration subsequently.

[0049] Refer to Figure 2 and Figure 3 , a lifting assembly 4 for lifting the driving motor 31 is arranged between the base 1 and the support plate 12. A plurality of sampling assemblies 6 for sampling soils at different depths are arranged on the drill rod 2. In the embodiment of the present application, there are three sampling assemblies 6 in total, and the three sampling assemblies 6 are uniformly arranged on the drill rod 2 in the vertical direction. A linkage assembly 5 is arranged between the sampling assembly 6 and the driving motor 31. When the drilling is about to be completed, the driving motor 31 is lifted by the lifting assembly 4 to be connected to the linkage assembly 5. At this time, the driving gear 33 is separated from the driven gear 34, so that the drill rod 2 no longer rotates. Then the cylinder 32 is turned off and the drill rod 2 is not retracted, and the driving motor 31 will drive the driving gear 33 to continue to rotate. The rotation of the driving gear 33 will drive the linkage assembly 5 to operate, and the operation of the linkage assembly 5 will drive the sampling assembly 6 to extend into the soil layer to sample the soil; after sampling, the staff drives the driving motor 31 to reverse to recover the sampling assembly 6. Finally, the cylinder 32 is started again to drive the drill rod 2 to be recovered. After the drill rod 2 is recovered above the ground, the soil is taken out and the soil quality is detected. After the drilling of this device is completed, there is no need for workers to use additional instruments to sample the soil, and the operation is convenient. Moreover, this device can take soils at different depths, so that the detection of the soil quality is more accurate.

[0050] Refer to Figure 3, the jacking assembly 4 includes a sliding plate 41, a guide rod 42 and a jacking rod 43. The sliding plate 41 is arranged on the top of the support plate 12, and both ends of the sliding plate 41 in the length direction extend out of the support plate 12. The driving motor 31 is fixed on the top of the sliding plate 41. The guide rod 42 is welded to the top wall of the support plate 12 and penetrates through the sliding plate 41. The sliding plate 41 can slide vertically on the guide rod 42, and the guide rod 42 improves the stability of the sliding plate 41 sliding in the vertical direction. The jacking rod 43 is welded to the top wall of the base 1. In the embodiment of the present application, there are two jacking rods 43 in total, and the two jacking rods 43 are distributed at both ends of the base 1 in the width direction. When the drilling is about to be completed, the top wall of the jacking rod 43 will abut against the bottom walls of both ends of the sliding plate 41 extending out of the support plate 12. As the cylinder 32 pushes the drill rod 2 to continue to move downward, the jacking rod 43 will jack up the sliding plate 41. At this time, the driving gear 33 is separated from the driven gear 34 and connected to the linkage assembly 5. Thus, the operation of the linkage assembly 5 will drive the sampling assembly 6 to extend into the soil layer to sample the soil.

[0051] Refer to Figure 2 and Figure 3 , the linkage assembly 5 includes a transmission rod 51, a connecting rod 52, a first gear 53, a second gear 54 and a third gear 55. A receiving cavity 21 is formed inside the drill rod 2. The connecting rod 52 is rotatably connected to the top of the support plate 12 through a plate body and is horizontally arranged. One end of the connecting rod 52 close to the driving rod 35 is coaxially fixed to the first gear 53, and the end far from the driving rod 35 is coaxially fixed to the second gear 54. The transmission rod 51 is rotatably connected to the inner top wall of the receiving cavity 21 and is vertically arranged. The top end of the transmission rod 51 penetrates through the inner wall of the receiving cavity 21 and the bottom wall of the support plate 12 and extends above the support plate 12. One end of the transmission rod 51 above the support plate 12 is coaxially fixed to the third gear 55, and the third gear 55 meshes with the second gear 54. One end of the transmission rod 51 inside the receiving cavity 21 is connected to the sampling assembly 6. When the driving gear 33 is separated from the driven gear 34 and moves towards the first gear 53, during this process, since the driving gear 33 meshes with the first gear 53 during the upward movement, it cannot be meshed instantaneously, resulting in a period of no-load, which will cause certain damage to the driving gear 33 and the first gear 53. Furthermore, the driving gear 33 and the first gear 53 are prone to need replacement; when the driving gear 33 meshes with the first gear 53, the rotation of the driving gear 33 will sequentially drive the rotation of the first gear 53, the connecting rod 52, the second gear 54, the third gear 55 and the transmission rod 51. The rotation of the transmission rod 51 will drive the sampling assembly 6 to extend into the soil layer to sample the soil.

[0052] Refer to Figure 4, the sampling assembly 6 includes a sampling cylinder 61, a connecting block 62, a screw 63, a fourth gear 64 and a fifth gear 65. Three accommodating holes 22 are formed in the side wall of the drill pipe 2, and the three accommodating holes 22 are uniformly arranged on the drill pipe 2 in the vertical direction, and the accommodating holes 22 communicate with the accommodating cavity 21. The sampling cylinder 61 is adaptively inserted into the accommodating hole 22, and the sampling cylinder 61 is square. One end of the sampling cylinder 61 extends into the accommodating cavity 21, the other end is flush with the opening of the accommodating hole 22 and this end is the opening of the sampling cylinder 61. The end wall of the sampling cylinder 61 at the end located in the accommodating cavity 21 is fixedly welded to the connecting block 62. A threaded hole 621 is formed in the side wall of the connecting block 62 away from the sampling cylinder 61. The screw 63 is horizontally arranged in the accommodating cavity 21 and is rotatably connected to the inner wall of the accommodating cavity 21 through a plate body. One end of the screw 63 is threadedly connected to the threaded hole 621, and the other end is coaxially fixed to the fifth gear 65. One end of the transmission rod 51 located in the accommodating cavity 21 is coaxially fixed to the fourth gear 64, and the fourth gear 64 meshes with the fifth gear 65. When the transmission rod 51 rotates, the rotation of the transmission rod 51 will successively drive the rotation of the fourth gear 64, the fifth gear 65 and the screw 63. The rotation of the screw 63 will drive the connecting block 62 to drive the sampling cylinder 61 to extend into the soil layer to sample the soil.

[0053] In addition, a soil-breaking blade 611 is welded to the side wall of the sampling cylinder 61 facing away from the connecting block 62. The cross section of the soil-breaking blade 611 is triangular, and the soil-breaking blade 611 facilitates the sampling cylinder 61 to more easily extend into the soil layer to sample the soil.

[0054] Refer to Figure 5 , a soil-blocking assembly 7 is arranged at the opening of the sampling cylinder 61. When the sampling cylinder 61 extends into the soil layer for soil sampling, the soil-blocking assembly 7 will automatically open the sampling cylinder 61, so as to facilitate the soil to enter the sampling cylinder 61; when the sampling cylinder 61 is retracted into the accommodating hole 22, the soil-blocking assembly 7 will automatically close the sampling cylinder 61, so that the soil in the sampling cylinder 61 is not easily dropped out of the sampling cylinder 61.

[0055] Refer to Figure 5, the retaining component 7 includes a baffle 71, a rotating rod 72 and a torsion spring 73. The rotating rod 72 is rotatably connected to the inner wall of the opening of the sampling cylinder 61 and the rotating rod 72 is horizontally arranged. The baffle 71 is sleeved on the rotating rod 72 through a bushing. The torsion spring 73 is also sleeved on the rotating rod 72, and one end of the torsion spring 73 abuts against the side wall of the baffle 71 close to the connecting block 62, and the other end abuts against the top wall of the sampling cylinder 61. When the sampling cylinder 61 extends into the soil layer for soil sampling, the soil will squeeze the baffle 71 until the baffle 71 flips open to the side of the bottom of the sampling cylinder 61. At this time, the torsion spring 73 deforms and stores energy, so that the soil can enter the sampling cylinder 61; when the sampling cylinder 61 is recovered, the torsion spring 73 will restore its deformation, so that the baffle 71 will automatically flip to the state of closing the sampling cylinder 61, so that the soil in the sampling cylinder 61 is not easily dropped out of the sampling cylinder 61.

[0056] Referring to Figure 4 , a push plate 8 is adaptively inserted into the sampling cylinder 61, and the push plate 8 can slide in the horizontal direction. A spring 81 is welded inside the sampling cylinder 61. One end of the spring 81 is welded and fixed to the side wall of the push plate 8 away from the baffle 71, and the other end is welded and fixed to the bottom of the sampling cylinder 61. When the soil enters the sampling cylinder 61, the soil will push the push plate 8. At this time, the push plate 8 moves towards the bottom of the sampling cylinder 61 through the deformation of the spring 81. Then when the drill rod 2 is recovered above the ground, the staff opens the baffle 71, and the push plate 8 will move towards the opening of the sampling cylinder 61 through the elastic force of the spring 81. At this time, the soil will be pushed out of the sampling cylinder 61 by the soil, so that the staff does not need to reach into the sampling cylinder 61 to take the soil by hand, and the operation is convenient.

[0057] The implementation principle of a drilling device for geotechnical investigation in an embodiment of the present application is as follows: When geotechnical investigation is required, the device is moved to the location where drilling is needed. The cylinder 32 is started to drive the drill rod 2 to move towards the ground. At the same time, the driving motor 31 is started to drive the driving gear 33 to rotate. The rotation of the driving gear 33 will successively drive the driven gear 34, the driving rod 35 and the drill rod 2 to rotate, so that the ground can be drilled quickly. When the drilling is about to be completed, the top wall of the ejector rod 43 will abut against the bottom walls of both ends of the slide plate 41 protruding from the support plate 12. As the cylinder 32 continues to push the drill rod 2 downward, the ejector rod 43 will lift the slide plate 41. At this time, the driving gear 33 is separated from the driven gear 34 and meshes with the first gear 53. The rotation of the driving gear 33 will successively drive the first gear 53, the connecting rod 52, the second gear 54, the third gear 55 and the transmission rod 51 to rotate. The rotation of the transmission rod 51 will successively drive the fourth gear 64, the fifth gear 65 and the screw rod 63 to rotate. The rotation of the screw rod 63 will drive the connecting block 62 to drive the sampling cylinder 61 to extend into the soil layer to sample the soil. Finally, the cylinder 32 is started again to drive the drill rod 2 to be retracted. After the drill rod 2 is retracted above the ground, the soil is taken out and the soil quality is detected. After the drilling is completed, the device does not require workers to use additional instruments to sample the soil, and the operation is convenient. Moreover, the device can take soil at different depths, so that the detection of soil quality is more accurate.

[0058] The embodiment of the present application also discloses a construction method of a drilling device for geotechnical investigation.

[0059] A construction method of a drilling device for geotechnical investigation includes the following steps:

[0060] S1. Move the drilling device to the location where drilling is needed;

[0061] S2. Start the driving motor 31 to drive the drill rod 2 to rotate; at the same time, start the cylinder 32 to push the drill rod 2 to move towards the ground, so as to drill the ground;

[0062] S3. After the drilling is completed, turn off the cylinder 32, and through the abutment of the ejector rod 43 and the slide plate 41, the slide plate 41 will drive the driving motor 31 to slide upward until the driving gear 33 meshes with the first gear 53;

[0063] S4. The rotation of the first gear 53 will successively drive the connecting rod 52, the second gear 54, the third gear 55, the transmission rod 51, the fourth gear 64, the fifth gear 65 and the screw rod 63 to rotate. The rotation of the screw rod 63 will push the sampling cylinder 61 to insert into the soil layer to sample the soil;

[0064] S5. The worker controls the driving motor 31 to reverse, so as to retract the sampling cylinder 61;

[0065] S6. Start the cylinder 32 to retrieve the drill pipe 2;

[0066] S7. The staff takes out the soil in the sampling cylinder 61 and conducts soil quality detection on the soil.

[0067] The above are all preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A drilling device for geotechnical investigation, comprising a drill pipe (2) provided on a base (1), characterized in that: The top of the drill pipe (2) is rotatably connected to a support plate (12). The top of the base (1) is fixedly provided with a top plate (13). A driving assembly (3) for driving the drill pipe (2) to drill is arranged between the support plate (12) and the top plate (13). A lifting assembly (4) is arranged between the base (1) and the support plate (12). A plurality of sampling assemblies (6) for sampling soils at different depths are arranged on the drill pipe (2). The plurality of sampling assemblies (6) are arranged on the drill pipe (2) in the vertical direction. A linkage assembly (5) is arranged between the sampling assembly (6) and the driving assembly (3); The driving assembly (3) includes a driving motor (31), a cylinder (32), a driving rod (35), a driving gear (33) and a driven gear (34). The driving motor (31) is arranged on the support plate (12), and the rotating shaft of the driving motor (31) is coaxially fixed to the driving gear (33). The body of the cylinder (32) is fixedly connected to the top plate (13), and the push rod of the cylinder (32) is fixedly connected to the support plate (12). The driving rod (35) penetrates through the support plate (12) and is coaxially fixed to the drill pipe (2). The driven gear (34) is coaxially fixed to the driving rod (35) and meshes with the driving gear (33); The lifting assembly (4) includes a sliding plate (41), a guiding rod (42) and a jacking rod (43). The sliding plate (41) is arranged on the top of the support plate (12). The guiding rod (42) is fixed to the top of the support plate (12) and penetrates through the sliding plate (41). The jacking rod (43) is fixed to the top wall of the base (1). When the drill pipe (2) finishes drilling, the jacking rod (43) abuts against the sliding plate (41); The linkage assembly (5) includes a transmission rod (51), a connecting rod (52), a first gear (53), a second gear (54) and a third gear (55). An accommodating cavity (21) is arranged inside the drill pipe (2). The transmission rod (51) is rotatably connected to the inner wall of the accommodating cavity (21) and penetrates through the inner wall of the accommodating cavity (21). The connecting rod (52) is rotatably connected to the top of the support plate (12). One end of the connecting rod (52) is coaxially fixed to the first gear (53), and the other end is coaxially fixed to the second gear (54). When the drill pipe (2) finishes drilling, the first gear (53) meshes with the driving gear (33). The third gear (55) is coaxially fixed to the end of the transmission rod (51) located on the top of the support plate (12) and meshes with the second gear (54). One end of the transmission rod (51) located inside the accommodating cavity (21) is connected to the sampling assembly (6); The sampling assembly (6) comprises a sampling tube (61), a connecting block (62), a screw rod (63), a fourth gear (64) and a fifth gear (65). A receiving hole (22) is provided on the side wall of the drill rod (2), and the receiving hole (22) is communicated with the receiving cavity (21). The sampling tube (61) is inserted into the receiving hole (22). The connecting block (62) is fixedly connected to one end of the sampling tube (61) located in the receiving cavity (21). A threaded hole (621) is provided on the side wall of the connecting block (62). One end of the screw rod (63) is threadedly connected to the threaded hole (621), and the other end is coaxially fixed to the fifth gear (65). One end of the transmission rod (51) located in the receiving cavity (21) is coaxially fixed to the fourth gear (64), and the fourth gear (64) is meshed with the fifth gear (65).

2. The drilling device for geotechnical investigation according to claim 1, characterized in that: A soil-breaking blade (611) is fixedly provided on the side wall of the sampling tube (61) on the side facing away from the connecting block (62), and the cross section of the soil-breaking blade (611) is triangular.

3. A drilling device for geotechnical investigation according to claim 1, characterized in that: A soil retaining assembly (7) is provided inside one end of the sampling tube (61) away from the connecting block (62); when the sampling tube (61) extends into the soil layer, the soil retaining assembly (7) opens the sampling tube (61); when the sampling tube (61) is retracted into the accommodating hole (22), the soil retaining assembly (7) closes the sampling tube (61).

4. A drilling device for geotechnical investigation according to claim 3, characterized in that: The soil retaining assembly (7) comprises a baffle (71), a rotating rod (72) and a torsion spring (73); the rotating rod (72) is rotatably connected to the inner wall of the sampling tube (61); the baffle (71) is sleeved on the rotating rod (72) via a shaft sleeve; the torsion spring (73) is also sleeved on the rotating rod (72); one end of the torsion spring (73) abuts against the baffle (71) and the other end abuts against the inner wall of the sampling tube (61).

5. A drilling device for geotechnical investigation according to claim 1, characterized in that: A push plate (8) is inserted into the interior of the sampling cylinder (61), and the push plate (8) can slide in a horizontal direction. A spring (81) is arranged inside the sampling cylinder (61), and one end of the spring (81) is fixedly connected to the push plate (8), and the other end is fixedly connected to the inner wall of the sampling cylinder (61).

6. A construction method of the drilling device for geotechnical investigation according to claim 5, characterized in that The following steps are involved: S1. Move the drilling device to the desired drilling location; S2, starting the driving motor (31) to drive the drill rod (2) to rotate; at the same time, starting the cylinder (32) to push the drill rod (2) toward the ground, thereby drilling a hole in the ground; S3, after the drilling is completed, the cylinder (32) is closed, and the slide plate (41) drives the driving motor (31) to slide upwards through the contact between the push rod (43) and the slide plate (41) until the driving gear (33) is meshed with the first gear (53); S4, the rotation of the first gear (53) will drive the connecting rod (52), the second gear (54), the third gear (55), the transmission rod (51), the fourth gear (64), the fifth gear (65) and the screw (63) to rotate in sequence, and the rotation of the screw (63) will push the sampling tube (61) to be inserted into the soil layer to sample the soil; S5. The operator controls the drive motor (31) to reverse, thereby retrieving the sampling cylinder (61). S6. Start the cylinder (32) to retrieve the drill pipe (2). S7. The operator takes out the soil in the sampling cylinder (61) and conducts soil texture testing on the soil.

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