Civil engineering rammed earth density detection device

Abstract

The invention discloses a civil engineering rammed earth density detection device, and relates to the technical field of civil engineering construction, the civil engineering rammed earth density detection device comprises a mounting frame, the mounting frame is arranged to be of an n-shaped structure, and a driving part is fixed to the top of the mounting frame; the moving part is arranged at the upper end of the inner cavity of the mounting frame, and a driving mechanism of the sampling part is mounted on the moving part; the sampling piece is arranged below the moving piece; the soil drilling part is arranged at the bottom of the sampling part. According to the civil engineering rammed earth density detection device, the earth drilling piece is designed to be quickly disassembled, a damaged cutter can be quickly disassembled, assembled and replaced through magnetic attraction connection of a positioning plate and a positioning groove, the maintenance time is shortened, sampling work continuity is ensured, the overall efficiency is improved, accurate guiding is provided for a moving piece through cooperation of a dovetail sliding block and a dovetail sliding groove and cooperation of a guide sleeve and a guide column, and the detection efficiency is improved. The sampling process is more stable; the driving piece, the moving piece and the sampling piece work cooperatively, automatic sampling is achieved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of civil construction, in particular to a device for detecting density of rammed earth in civil construction. Background Art

[0002] Rammed earth, as a verb, means to tamp, that is, to compact the soil. my country has used this technology for a very long time, from the Neolithic Age to the 1950s and 1960s. It has been used on a large scale. The general method of ramming earth is to use dry-rammed earth to compact the soil layer by layer. It is a high-intensity physical labor that requires a large number of workers, ranging from thousands to tens of thousands of people. Therefore, the foundations of the ancient buildings we see are all rammed earth. When testing the density of the rammed earth, a rammed earth extraction device is needed.

[0003] The invention with publication number CN114482145A discloses a civil engineering rammed earth density detection device, including a base plate, both sides of the top of the base plate are fixedly connected to support plates, the top of the support plate is fixedly connected to a top plate, the bottom of the top plate is fixedly connected to a hydraulic cylinder, the bottom of the hydraulic cylinder is fixedly connected to a pressure plate, a cross plate is movably connected between the two support plates, a lifting mechanism is provided inside the top plate, the bottom of the cross plate is fixedly connected to a triangular head, the inside of the triangular head is movably connected to a ring knife body, and a fixing mechanism is provided inside the triangular head.

[0004] As shown in the above invention, the existing detection device can drive the horizontal plate to adjust its height by setting a lifting mechanism, and can fix the ring cutter body by setting a fixing mechanism, so that the rammed earth extraction device does not need to be manually extracted and does not need to carry various auxiliary tools, thereby reducing the intensity of manual labor and improving work efficiency. However, the adjustment process of the fixing mechanism (such as screw rod, rotating plate, etc.) of the existing device is complicated and requires manual rotation operation, which is time-consuming and affects the overall sampling efficiency; and the fixing stability of the ring cutter body depends on the manual adjustment accuracy, which is prone to deviation. In addition, the existing device is not designed with a quick replacement structure. When the drilling component (such as the cutter) is damaged, it cannot be quickly disassembled and replaced, and the entire device needs to be overhauled, which affects the work progress; it is not adaptable to different foundations and lacks a convenient guide and stable structure. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a device for detecting density of rammed earth in civil construction, which solves the existing problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A device for detecting density of rammed earth for civil engineering, comprising:

[0007] A mounting frame, wherein the mounting frame is configured as an "X"-shaped structure, a bottom plate is fixed to the inner side of the lower end of the mounting frame, and a driving member is fixed to the top of the mounting frame, wherein the driving member is a hydraulic telescopic rod, an electric push rod or a telescopic cylinder;

[0008] A moving member, which is arranged at the upper end of the inner cavity of the mounting frame and is connected to the output end of the driving member on the mounting frame, and is used to drive the sampling member to move up and down, and the driving mechanism of the sampling member is installed on the moving member;

[0009] A sampling member is provided below the moving member, and the top of the sampling member is connected to a driving mechanism on the moving member, and is used for sampling the compacted civil engineering foundation;

[0010] The soil drilling piece is arranged at the bottom of the sampling piece. The soil drilling piece is arranged as a quick-detachable structure, which is convenient for rapid replacement when damaged.

[0011] Preferably, a plurality of anchor rods distributed in a rectangular array are fixed to both ends of the lower surface of the mounting frame for fixing the mounting frame on the ground, and a plurality of dovetail grooves distributed at equal intervals are provided on the inner walls on both sides of the mounting frame.

[0012] Preferably, guide columns are fixed at the four corners of the upper surface of the base plate, the top of the guide column is fixed to the inner top wall of the mounting frame, a through groove is provided in the middle of the base plate, a plurality of guide plates distributed in a circular array are fixed around the upper opening of the through groove, a plurality of first ball grooves vertically distributed at equal intervals are provided on the inner side of the guide plate, a first ball is arranged in the first ball groove, and the first ball is connected to the sampling piece to reduce the friction of the sampling piece.

[0013] Preferably, the movable part includes a movable plate arranged in a U-shaped structure, and a plurality of equally spaced dovetail sliders are fixed to the outer sides of both ends of the movable plate, and the dovetail sliders are adapted to the dovetail slide grooves to drive the movable plate to move vertically up and down, and through holes are provided at the four corners of the movable plate, and guide sleeves are fixed to the outer sides of the upper and lower openings of the through holes, and the guide sleeves are connected with the guide columns to guide the movement of the movable plate, and a reduction motor is installed in the middle of the upper surface of the movable plate, and the output shaft of the reduction motor is connected with a pressure-bearing part and a connecting part, and the connecting part is located below the pressure-bearing part and is used to connect the sampling part.

[0014] Preferably, the pressure-bearing member includes a pressure-bearing plate fixed to the outer side of the middle part of the output shaft of the reduction motor, and the upper surface edge of the pressure-bearing plate is provided with a plurality of second ball grooves distributed in a circular array, and the interior of the second ball groove is provided with second balls, and the second balls are fitted with the lower surface of the movable plate to reduce friction, and the lower surface edge of the pressure plate is connected to the connecting member through a plurality of connecting columns distributed in a circular array.

[0015] Preferably, the connecting member includes a connecting sleeve fixed to the bottom end of the output shaft of the reduction motor, and a plurality of screw grooves distributed in a circular array are opened on the circumference of the connecting sleeve. A limiting screw is connected through the interior of the screw groove, and a limiting block is fixed in the middle of the lower surface of the connecting sleeve.

[0016] Preferably, the sampling piece includes a sampling tube, an annular groove is provided on the outer side of the upper end of the sampling tube, the annular groove corresponds to the limit screw, a limit groove is provided in the middle part of the top end of the sampling tube, the limit groove is adapted to the limit block, and a plurality of positioning grooves distributed in a circular array are provided on the bottom edge of the sampling tube.

[0017] Preferably, the soil drilling part includes a mounting sleeve, an annular sealing plate is fixed at the top opening of the mounting sleeve, the annular sealing plate is fitted with the inner wall of the lower end of the sampling tube, and a plurality of positioning plates distributed in a circular array are fixed on the top edge of the mounting sleeve, the positioning plates are adapted to the positioning grooves, and the positioning plates are connected to the positioning grooves by magnetic attraction, and the bottom end of the mounting sleeve is set as a cutter.

[0018] The present invention also discloses a sampling method for a rammed earth density detection device for civil construction, comprising the following steps:

[0019] Step 1: Install and prepare the device: Secure the mounting frame to the ground surface of the construction site where sampling is to be performed using anchor rods. Ensure the mounting frame is stable. Check that the drive, reduction motor, and other components are functioning properly. Magnetically connect the drilling element to the positioning slot of the sampling element via the positioning plate. Install the drilling element at the bottom of the sampling tube, ensuring a secure fit.

[0020] Step 2: Adjust the moving part: Start the driving part, which drives the moving part to move vertically downward in the dovetail slot, and is guided by the guide column and the guide sleeve to move the moving part to a suitable height.

[0021] Step 3. Connect the sampling part: Align the annular groove on the top of the sampling tube with the limit screw of the connecting part on the moving part, rotate the sampling tube so that the limit screw is embedded in the annular groove, and at the same time, make the limit groove in the middle of the top of the sampling tube fit with the limit block on the lower surface of the connecting sleeve to complete the connection between the sampling part and the moving part.

[0022] Step 4: Sampling Operation: Start the reduction motor, which drives the sampling member through the connecting member. Simultaneously, the driving member is started again, pushing the movable member and the sampling member downward, allowing the drilling member to penetrate the compacted civil engineering foundation and drill the soil sample. During the sampling process, the pressure generated by the sampling is transmitted to the movable plate through the pressure-bearing member, and the second ball rolls in the second ball groove, reducing friction and protecting the reduction motor's rotating shaft.

[0023] Step 5: Sampling Completed and Device Reset: When the sampling depth reaches the desired level or sufficient sample has been collected, stop the reduction motor, activate the drive, and lift the movable element and sampling element upward, clearing the soil-boring element from the ground. Turn the limit screw to disengage the annular groove, remove the sampling tube, and retrieve the sample for subsequent density testing. Reset all device components and clean the device for future use.

[0024] Beneficial effects

[0025] The present invention provides a device for detecting the density of rammed earth in civil engineering. Compared with the prior art, it has the following advantages:

[0026] 1. The soil drilling part of this civil engineering rammed earth density detection device adopts a quick-detachment design. It is magnetically connected to the positioning slot through the positioning plate. The damaged cutter can be quickly disassembled and replaced, reducing maintenance time, ensuring the continuity of sampling work, and improving overall efficiency.

[0027] 2. This civil engineering rammed earth density detection device provides precise guidance for the moving parts through the cooperation of the dovetail slider and dovetail slide, the guide sleeve and the guide column, making the sampling process more stable; the coordinated work of the driving part, the moving part and the sampling part realizes automatic sampling, reduces the labor intensity, and the operation steps are clear, and the sampling accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the mounting frame structure of the present invention.

[0030] Figure 3 It is a schematic diagram of the structure of the moving part of the present invention.

[0031] Figure 4 It is a schematic structural diagram of the pressure-bearing member of the present invention.

[0032] Figure 5 Schematic diagram of the connector structure of the present invention.

[0033] Figure 6 It is a schematic diagram of the sampling component structure of the present invention.

[0034] Figure 7 It is a bottom view schematic diagram of the sampling piece structure of the present invention.

[0035] Figure 8 It is a schematic structural diagram of the soil drilling component of the present invention.

[0036] In the figure: mounting frame 1, driving part 11, anchor rod 12, dovetail slide 13, base plate 14, guide column 15, guide plate 16, first roller groove 17, first ball 18, moving part 2, movable plate 21, dovetail slider 22, guide sleeve 23, reduction motor 24, pressure-bearing part 25, pressure-bearing plate 251, second ball groove 252, second ball 253, connecting column 254, connecting part 26, connecting sleeve 261, screw groove 262, limit screw 263, limit block 264, sampling part 3, sampling tube 31, annular groove 32, limit groove 33, positioning groove 34, drilling part 4, mounting sleeve 41, annular sealing plate 42, positioning plate 43, cutter 44. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0038] See for example Figure 1-8 , the present invention provides the following two technical solutions:

[0039] The first embodiment: A device for detecting density of rammed earth in civil engineering, comprising a mounting frame 1, a moving part 2, a sampling part 3 and a soil drilling part 4.

[0040] Specifically, the mounting frame 1 is configured as an "X"-shaped structure, with a base plate 14 fixed to the inner side of the lower end of the mounting frame 1, and a driving member 11 fixed to the top of the mounting frame 1. The driving member 11 is a hydraulic telescopic rod, an electric push rod or a telescopic cylinder. A plurality of anchor rods 12 distributed in a rectangular array are fixed at both ends of the lower surface of the mounting frame 1, which are used to fix the mounting frame 1 on the ground. A plurality of dovetail grooves 13 distributed at equal intervals are provided on the inner walls of both sides of the mounting frame 1. Guide columns 15 are fixed at the four corners of the upper surface of the base plate 14, and the top of the guide column 15 is fixed to the inner top wall of the mounting frame 1. A through groove is provided in the middle of the base plate 14, and a plurality of guide plates 16 distributed in a ring array are fixed around the upper end opening of the through groove. A plurality of first ball grooves 17 distributed vertically at equal intervals are provided on the inner side of the guide plate 16. A first ball 18 is provided in the first ball groove 17. The first ball 18 is connected to the sampling member 3 and is used to reduce the friction of the sampling member 3 when the sampling member 3 rotates.

[0041] The movable member 2 is provided at the upper end of the inner cavity of the mounting frame 1, and the movable member 2 is connected to the output end of the driving member 11 on the mounting frame 1, and is used to drive the sampling member 3 to move up and down. The driving mechanism of the sampling member 3 is installed on the movable member 2, and the movable member 2 includes a movable plate 21 with a U-shaped structure. A plurality of dovetail sliders 22 distributed at equal intervals are fixed on the outer sides of both ends of the movable plate 21. The dovetail sliders 22 are adapted to the dovetail slide 13 to drive the movable plate 21 to move vertically up and down. Through holes are provided at the four corners of the movable plate 21, and guide sleeves 23 are fixed on the outer sides of the upper and lower openings of the through holes. The guide sleeves 23 are connected with the guide posts 15 through and are used to guide the movement of the movable plate 21. A reduction motor 24 is installed in the middle of the upper surface of the movable plate 21. The reduction motor 24 is a reduction mechanism. The output shaft of the reduction motor 24 is connected with a pressure-bearing member 25 and a connecting member 26. The connecting member 26 is located below the pressure-bearing member 25 and is used to connect the sampling member 3, the pressure-bearing member 2 5 includes a pressure plate 251 fixed to the outside of the middle part of the output shaft of the reduction motor 24. The upper surface edge of the pressure plate 251 is provided with a plurality of second ball grooves 252 distributed in an annular array. Second balls 253 are arranged inside the second ball grooves 252. The second balls 253 are in contact with the lower surface of the movable plate 21 to reduce friction. When the sampling member 3 takes a sample, the pressure generated is transmitted to the movable plate 21 through the pressure plate 251, without damaging the rotating shaft of the reduction motor 24. The lower surface edge of the pressure plate 251 is connected to the connecting member 26 through a plurality of connecting columns 254 distributed in an annular array. The connecting columns 254 play a supporting role. The connecting member 26 includes a connecting sleeve 261 fixed to the bottom end of the output shaft of the reduction motor 24. The circumference of the connecting sleeve 261 is provided with a plurality of screw grooves 262 distributed in an annular array. The screw grooves 262 are connected to the inner part of the limit screws 263. A limit block 264 is fixed to the middle part of the lower surface of the connecting sleeve 261.

[0042] More specifically, the sampling piece 3 is arranged below the moving piece 2, and the top of the sampling piece 3 is connected to the driving mechanism on the moving piece 2, and is used to sample the compacted civil engineering foundation. The sampling piece 3 includes a sampling barrel 31, and an annular groove 32 is provided on the outer side of the upper end of the sampling barrel 31. The annular groove 32 corresponds to the limit screw 263, and can limit the sampling barrel 31 on the connecting sleeve 261. A limiting groove 33 is provided in the middle of the top end of the sampling barrel 31, and the limiting groove 33 is adapted to the limiting block 264. The limiting block 264 and the limiting groove 33 are both set to a polygonal structure, so that the connecting sleeve 261 can drive the sampling barrel 31 to rotate, and a plurality of positioning grooves 34 distributed in a circular array are provided on the bottom edge of the sampling barrel 31.

[0043] More specifically, the soil drilling piece 4 is arranged at the bottom of the sampling piece 3. The soil drilling piece 4 is set to a quick-release structure, which is convenient for quick replacement when damaged. The soil drilling piece 4 includes a mounting sleeve 41. An annular sealing plate 42 is fixed at the top opening of the mounting sleeve 41. The annular sealing plate 42 fits with the inner wall of the lower end of the sampling tube 31 to play a sealing role. A plurality of positioning plates 43 distributed in a circular array are fixed to the top edge of the mounting sleeve 41. The positioning plates 43 are adapted to the positioning grooves 34, so that the sampling tube 31 can drive the mounting sleeve 41 to rotate, and the positioning plates 43 are connected to the positioning grooves 34 by magnetic attraction, so that the mounting sleeve 41 is stably installed and can be quickly disassembled and assembled. The bottom end of the mounting sleeve 41 is set to a cutter 44, which can be used for drilling soil sampling.

[0044] Second embodiment: The present invention also discloses a sampling method for a device for detecting density of rammed earth in civil construction, comprising the following steps:

[0045] Step 1: Device installation and preparation: Fix the mounting frame 1 to the ground of the civil engineering foundation where sampling is required through the anchor rod 12, ensure the stability of the mounting frame, check whether the driving part 11 (hydraulic telescopic rod, electric push rod or telescopic cylinder), reduction motor 24 and other components are working properly, connect the drilling part 4 (mounting sleeve 41, annular sealing plate 42, positioning plate 43, cutter 44) to the positioning groove 34 of the sampling part 3 (sampling tube 31) through the positioning plate 43, and install it at the bottom of the sampling tube 31 to ensure it is firmly installed;

[0046] Step 2: Adjust the moving part: Start the driving part 11, which drives the moving part 2 (movable plate 21) to move vertically downward in the dovetail chute 13, and is guided by the guide column 15 and the guide sleeve 23 to move the moving part 2 to a suitable height;

[0047] Step 3: Connect the sampling member: Align the annular groove 32 on the top of the sampling tube 31 with the limit screw 263 of the connecting member 26 (connecting sleeve 261) on the movable member 2. Rotate the sampling tube 31 so that the limit screw 263 fits into the annular groove 32. At the same time, fit the limit groove 33 in the middle of the top of the sampling tube 31 into the limit block 264 on the lower surface of the connecting sleeve 261 to complete the connection between the sampling member 3 and the movable member 2.

[0048] Step 4: Sampling Operation: Start the reduction motor 24, which drives the sampling member 3 to rotate via the connecting member 26. Simultaneously, the driving member 11 is started again, pushing the movable member 2 and the sampling member 3 downward, causing the drilling member 4 (cutter 44) to cut into the compacted earthwork foundation to drill and sample the soil. During the sampling process, the pressure generated by the sampling is transmitted to the movable plate 21 via the pressure-bearing member 25 (pressure-bearing plate 251), and the second ball 253 rolls within the second ball groove 252, reducing friction and protecting the rotating shaft of the reduction motor 24.

[0049] Step 5. Sampling is completed and the device is reset: When the sampling reaches the required depth or sufficient samples are obtained, the reduction motor 24 is stopped, the driving member 11 is started, the moving member 2 and the sampling member 3 are lifted upward, so that the soil drilling member 4 leaves the ground, the limit screw 263 is turned to disengage the annular groove 32, the sampling tube 31 is removed, and the internal sample is taken out for subsequent density detection. The various components of the device are reset and the device is cleaned for next use.

[0050] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting density of rammed earth for civil construction, characterized in that: include: A mounting frame, wherein the mounting frame is configured as an "X"-shaped structure, a bottom plate is fixed to the inner side of the lower end of the mounting frame, and a driving member is fixed to the top of the mounting frame, wherein the driving member is a hydraulic telescopic rod, an electric push rod or a telescopic cylinder; A moving member, which is arranged at the upper end of the inner cavity of the mounting frame and is connected to the output end of the driving member on the mounting frame, and is used to drive the sampling member to move up and down, and the driving mechanism of the sampling member is installed on the moving member; A sampling member is provided below the moving member, and the top of the sampling member is connected to a driving mechanism on the moving member, and is used for sampling the compacted civil engineering foundation; The soil drilling piece is arranged at the bottom of the sampling piece. The soil drilling piece is arranged as a quick-detachable structure, which is convenient for rapid replacement when damaged.

2. The device for detecting density of rammed earth for civil construction according to claim 1, characterized in that: A plurality of anchor rods distributed in a rectangular array are fixed to both ends of the lower surface of the mounting frame for fixing the mounting frame on the ground. A plurality of dovetail grooves distributed at equal intervals are opened on the inner walls on both sides of the mounting frame.

3. The device for detecting density of rammed earth for civil construction according to claim 1, characterized in that: Guide columns are fixed at the four corners of the upper surface of the base plate, the top of the guide column is fixed to the inner top wall of the mounting frame, a through groove is provided in the middle of the base plate, a plurality of guide plates distributed in a circular array are fixed around the upper end opening of the through groove, a plurality of first ball grooves distributed vertically at equal intervals are provided on the inner side of the guide plate, a first ball is provided in the first ball groove, and the first ball is connected to the sampling piece to reduce the friction of the sampling piece.

4. The device for detecting density of rammed earth for civil construction according to claim 1, characterized in that: The movable part includes a movable plate set to a U-shaped structure, and a plurality of equally spaced dovetail sliders are fixed to the outer sides of both ends of the movable plate. The dovetail sliders are adapted to the dovetail slide grooves and are used to drive the movable plate to move vertically up and down. Through holes are provided at the four corners of the movable plate, and guide sleeves are fixed to the outer sides of the upper and lower openings of the through holes. The guide sleeves are connected with the guide columns through and are used to guide the movement of the movable plate. A reduction motor is installed in the middle of the upper surface of the movable plate, and the output shaft of the reduction motor is connected to a pressure-bearing part and a connecting part. The connecting part is located below the pressure-bearing part and is used to connect the sampling part.

5. The device for detecting density of rammed earth for civil construction according to claim 4, characterized in that: The pressure-bearing member includes a pressure-bearing plate fixed on the outer side of the middle part of the output shaft of the reduction motor. The upper surface edge of the pressure-bearing plate is provided with a plurality of second ball grooves distributed in a circular array. Second balls are arranged inside the second ball grooves. The second balls are in contact with the lower surface of the movable plate to reduce friction. The lower surface edge of the pressure-bearing plate is connected to the connecting member through a plurality of connecting columns distributed in a circular array.

6. The device for detecting density of rammed earth for civil construction according to claim 4, characterized in that: The connecting part includes a connecting sleeve fixed to the bottom end of the output shaft of the reduction motor. A plurality of screw grooves distributed in a circular array are opened on the circumference of the connecting sleeve. A limiting screw is connected through the interior of the screw groove. A limiting block is fixed in the middle of the lower surface of the connecting sleeve.

7. The device for detecting density of rammed earth for civil construction according to claim 1, characterized in that: The sampling piece includes a sampling tube, an annular groove is provided on the outer side of the upper end of the sampling tube, the annular groove corresponds to the limit screw, a limit groove is provided in the middle of the top end of the sampling tube, the limit groove is adapted to the limit block, and a plurality of positioning grooves distributed in a circular array are provided on the bottom edge of the sampling tube.

8. The device for detecting density of rammed earth for civil construction according to claim 1, characterized in that: The soil drilling piece includes a mounting sleeve, an annular sealing plate is fixed at the top opening of the mounting sleeve, the annular sealing plate is fitted with the inner wall of the lower end of the sampling tube, a plurality of positioning plates distributed in an annular array are fixed to the top edge of the mounting sleeve, the positioning plates are adapted to the positioning grooves, and the positioning plates and the positioning grooves are connected by magnetic attraction, and the bottom end of the mounting sleeve is set as a cutter.

9. A sampling method for a rammed earth density detection device for civil construction, based on the rammed earth density detection device for civil construction according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Install and prepare the device: Fix the mounting frame to the ground of the civil engineering site where sampling is required through anchor rods, ensure the stability of the mounting frame, check whether the drive parts, reduction motor and other components are working properly, connect the drilling part to the positioning groove of the sampling part through the positioning plate, and install it on the bottom of the sampling tube to ensure it is firmly installed; Step 2: Adjust the moving part: Start the driving part, which drives the moving part to move vertically downward in the dovetail chute, and guides the moving part to the appropriate height through the guide column and guide sleeve; Step 3: Connect the sampling part: Align the annular groove on the top of the sampling tube with the limit screw on the connector on the moving part, rotate the sampling tube so that the limit screw fits into the annular groove, and at the same time, fit the limit groove in the middle of the top of the sampling tube into the limit block on the lower surface of the connecting sleeve to complete the connection between the sampling part and the moving part; Step 4: Sampling operation: Start the reduction motor, which drives the sampling piece to rotate through the connecting piece. At the same time, start the driving piece again, which pushes the moving piece and the sampling piece to move downward, so that the drilling piece cuts into the compacted civil engineering foundation to drill the soil and sample. During the sampling process, the pressure generated by the sampling is transmitted to the movable plate through the pressure-bearing piece, and the second ball rolls in the second ball groove to reduce friction and protect the rotating shaft of the reduction motor. Step 5. Sampling is completed and the device is reset: When the sampling reaches the required depth or enough samples are obtained, stop the reduction motor, start the driving part, lift the moving part and the sampling part upward, make the drilling part leave the ground, turn the limit screw to make it out of the annular groove, remove the sampling tube, take out the internal sample for subsequent density detection, reset the various parts of the device, and clean the device for next use.

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