A rammed earth wall quality sampling device

Abstract

The invention provides a rammed earth wall quality sampling device, which effectively solves the problems that during sampling and testing of modern rammed earth walls, rammed earth layer samples are inconvenient to take out, hammering during sampling will cause cracks inside the wall, easily causing hidden damage inside the wall, the quality of test samples cannot be guaranteed, the process is cumbersome, and the operation is inconvenient; the technical solution is as follows: it includes a fixed cylinder, a ring plate is provided at the lower end of the fixed cylinder, a plurality of vertical shafts are provided on the ring plate, a pulley is provided at the upper end of the vertical shaft, a baffle is provided in the middle of the vertical shaft, and a spiral auger is provided on the vertical shaft; a shell is provided in the fixed cylinder; a plurality of rotating cylinders are provided on the fixed cylinder, a pin is provided in the rotating cylinder, a clamping hole is provided on the shell, an incomplete gear is provided on the rotating cylinder, and a bevel gear is provided on the upper end of the vertical shaft; a hydraulic cylinder is fixed on the lower side of the shell, and an oil pump is provided on the shell; a plurality of first arc plates are provided around the lower end of the piston rod, a second arc plate is provided between the first arc plates, and a connecting cylinder is provided at the lower end of the hydraulic cylinder; a plurality of wedge blocks are provided on the first arc plate and the second arc plate.

Description

Technical Field

[0001] The invention relates to the technical field of rammed earth wall construction, in particular to a rammed earth wall quality sampling device. Background Art

[0002] Modern rammed earth wall technology is changing with each passing day. The strength of the improved rammed earth wall is greatly increased compared to the traditional rammed earth wall. The improvements in scaffolding and formwork technology not only avoid the occurrence of adverse conditions on the surface of the rammed earth wall, but also increase the stability and safety of the formwork. The ramming steps of modern rammed earth walls can be roughly divided into: first prepare the materials, then build the wall. The wall construction adopts layer-by-layer ramming, which specifically involves supporting the formwork, pouring the soil, and ramming repeatedly until the preset height is reached. In this process, after each layer of rammed earth is rammed, it is necessary to perform random ring knife sampling on the layer to conduct unconfined compressive strength tests and measure wet density and dry density.

[0003] The existing ring knife sampling generally uses the traditional circular cylindrical ring knife, which is hammered into a rammed earth layer, and then the soil around the ring knife is removed, and finally the ring knife and the sample inside it are taken out. Since the thickness of each layer of rammed earth obtained after tamping is 16-20cm, it is ideal to take a height of 15cm when sampling unconfined compression test pieces. However, considering that the thickness of prefabricated walls is mostly 30cm-60cm, the cone impact force when the ring knife enters is enough to cause internal cracks in the newly rammed and thinner wall, especially at the corners of the wall, affecting the service life. Due to this limitation, the existing technology can only use a ring knife of the smallest possible size, resulting in measurement deviation; in addition, when the ring knife and the sample inside it need to be taken out, it is necessary to manually use a small shovel to remove the soil around the ring knife. If the amount of soil removed is too large, it will cause damage to the wall and affect the density of the next layer of tamping. If the amount of soil removed is too small, the ring knife cannot take out a complete sample, affecting the quality of detection. In addition, it is also worth noting that the amount of soil removed by the ring cutter is small, which is not conducive to the subsequent wet density and dry density measurement, and the measurement results have large deviations.

[0004] In summary, the existing ring knife sampling technology in rammed earth wall construction is seriously backward. There is no special tool for sampling the rammed earth layer of the wall, especially for thin walls. The repeated hammering during ring knife sampling can easily cause internal defects or cracks in the wall. In the process of removing the ring knife, a large amount of soil needs to be removed to obtain a complete sample, which will cause quality risks for the ramming of the next layer. The whole process requires manual operation, which is inefficient and cumbersome. Combined with the construction site, the templates on both sides of the rammed earth layer restrict the movement of personnel, which will also cause certain inconveniences to the sampling work. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a rammed earth wall quality sampling device, which effectively solves the problems of inconvenience in taking out rammed earth layer samples during sampling and testing in the process of ramming of modern rammed earth walls, hammering during sampling will cause cracks inside the wall, and easily cause hidden damage inside the wall, the whole process requires manual operation, the quality of the test samples cannot be guaranteed, the process is cumbersome, and the operation is inconvenient.

[0006] The technical solution is as follows: it comprises a vertical fixed cylinder, an annular plate is fixed on the outer side of the lower end of the fixed cylinder, a plurality of vertical shafts are passed through the annular plate, a pulley is fixed on the upper end of the vertical shaft, the plurality of pulleys are driven by a belt, a horizontal baffle is fixed in the middle of the vertical shaft, a spiral auger is fixed on the lower half of the vertical shaft; a shell that can slide up and down is arranged in the fixed cylinder, and the shell cannot rotate; a plurality of rotating drums that can rotate are passed through the side wall of the fixed cylinder, the rotating drums correspond to the vertical shafts one by one, and a rotating drum is installed between the rotating drum and the side wall of the fixed cylinder. Torsion spring, a pin shaft that can slide along the rotating cylinder is provided in the rotating cylinder, the rotating cylinder can drive the pin shaft to rotate, one end of the pin shaft extends out of the rotating cylinder and is placed in the fixed cylinder, the end of the pin shaft in the fixed cylinder is a wedge-shaped surface, and a compression spring is connected between the other end of the pin shaft and the rotating cylinder, a plurality of clamping holes that match the wedge-shaped surface are provided on the side wall of the shell, and the direction of the wedge-shaped surface on the pin shaft can control the upward or downward movement of the shell, an incomplete gear is fixed on one end of the rotating cylinder placed outside the fixed cylinder, and a bevel gear that meshes with the incomplete gear is fixed on the upper end of the vertical shaft;

[0007] A vertical hydraulic cylinder is fixed on the lower side of the shell, and the piston in the hydraulic cylinder divides the cavity into two separate upper and lower chambers. An oil pump is fixed on the lower end surface of the shell, and the oil pump is connected to the upper and lower chambers through a pipeline; the piston rod in the hydraulic cylinder extends downward, and there are multiple vertical first arc plates around the lower end of the piston rod. The lower end of the piston rod is fixed to the first arc plate through multiple fixing rods, and a second arc plate is provided between two adjacent first arc plates. A connecting tube is fixed to the lower end of the hydraulic cylinder, and the second arc plate and the connecting tube are fixed together through multiple connecting rods; multiple wedge blocks are fixed on the inner side walls of the first arc plate and the second arc plate, and the lower ends of the inner side surfaces of the wedge blocks are inclined outward, and the multiple first arc plates and the multiple second arc plates can form a complete circular ring.

[0008] Furthermore, the rotating drum and the pin shaft are matched with a spline structure.

[0009] Furthermore, the fixing tube has a polygonal cross section, and the outer side wall of the shell is in close contact with the fixing tube.

[0010] Furthermore, a transverse plate is fixed inside the shell, a flat plate is fixed outside the upper end of the fixed cylinder, and counterweights are placed on both the transverse plate and the flat plate.

[0011] Furthermore, a first motor is connected to one of the bevel gears, and the first motor is fixed to the outside of the fixed cylinder via a fixing plate.

[0012] Furthermore, a second motor is fixed on the oil pump, the second motor is a servo motor capable of forward and reverse rotation, and the second motor is fixed in the housing cavity.

[0013] Furthermore, a horizontal circular plate is provided at the lower side of the oil pump, and the circular plate is placed in a cavity formed by a circular ring of a plurality of first arc-shaped plates and a second arc-shaped plate, and an outer edge of the circular plate is in contact with the first arc-shaped plates and the second arc-shaped plates.

[0014] The present invention has an ingenious structure. It improves the soil sampling method in view of the actual situation in the process of ramming modern rammed earth walls. It adopts a step-by-step alternating insertion method to take samples in the sampling area, and can pull out sufficient and reliable soil samples at one time, eliminating the quality and safety hazards to the wall caused by repeated hammering, and also eliminating the step of manual soil digging, thereby greatly improving the sampling efficiency, saving labor, time and effort, having strong practicability and being easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front cross-sectional view of the present invention.

[0016] Figure 2 for Figure 1 Middle AA section view.

[0017] Figure 3 for Figure 1 Middle BB section view.

[0018] Figure 4 It is a schematic structural diagram of the first arc plate, the second arc plate, the connecting tube, the lead screw, the connecting rod and the fixing rod in the present invention.

[0019] Figure 5 This is the first spiral auger style in the present invention.

[0020] Figure 6 This is the second spiral auger style in the present invention.

[0021] Figure 7 A state diagram is used for the present invention. DETAILED DESCRIPTION

[0022] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0023] Depend on Figures 1 to 7The present invention comprises a vertical fixed cylinder 1, an annular plate 2 is fixed to the outer side of the lower end of the fixed cylinder 1, a plurality of vertical vertical shafts 3 are penetrated on the annular plate 2, a pulley 4 is fixed to the upper end of the vertical shaft 3, the plurality of pulleys 4 are driven by belts, a horizontal baffle 5 is fixed to the middle of the vertical shaft 3, a spiral auger 6 is fixed to the lower half of the vertical shaft 3; a shell 7 that can slide up and down is arranged in the fixed cylinder 1, and the shell 7 cannot rotate; a plurality of rotatable rotating cylinders 8 are penetrated on the side wall of the fixed cylinder 1, the rotating cylinders 8 correspond to the vertical shafts 3 one by one, and a torsion spring is installed between the rotating cylinder 8 and the side wall of the fixed cylinder 1, There is a pin shaft 9 that can slide along the rotating cylinder 8, and the rotating cylinder 8 can drive the pin shaft 9 to rotate. One end of the pin shaft 9 extends out of the rotating cylinder 8 and is placed in the fixed cylinder 1. The end of the pin shaft 9 in the fixed cylinder 1 is a wedge-shaped surface, and a compression spring is connected between the other end of the pin shaft 9 and the rotating cylinder 8. A plurality of clamping holes that match the wedge-shaped surface are opened on the side wall of the shell 7. The direction of the wedge-shaped surface on the pin shaft 9 can control the upward or downward movement of the shell 7. An incomplete gear 10 is fixed to one end of the rotating cylinder 8 placed outside the fixed cylinder 1, and a bevel gear 11 meshing with the incomplete gear 10 is fixed to the upper end of the vertical shaft 3;

[0024] A vertical hydraulic cylinder 12 is fixed to the lower side of the shell 7. The piston in the hydraulic cylinder 12 divides the cavity into two separate upper and lower chambers. An oil pump 13 is fixed to the lower end surface of the shell 7, and the oil pump 13 is connected to the upper and lower chambers through a pipeline; the piston rod in the hydraulic cylinder 12 extends downward, and there are multiple vertical first arc plates 14 around the lower end of the piston rod. The lower end of the piston rod is fixed to the first arc plate 14 through multiple fixing rods 15, and a second arc plate 16 is arranged between two adjacent first arc plates 14. A connecting tube 17 is fixed to the lower end of the hydraulic cylinder 12, and the second arc plate 16 is fixed to the connecting tube 17 through multiple connecting rods 18; multiple wedge blocks 19 are fixed on the inner side walls of the first arc plate 14 and the second arc plate 16, and the lower end of the inner side surface of the wedge block 19 is inclined outward, and the multiple first arc plates 14 and the multiple second arc plates 16 can form a complete circular ring.

[0025] In order to realize that the rotating drum 8 can drive the pin shaft 9 to rotate, a spline structure is formed between the rotating drum 8 and the pin shaft 9.

[0026] In order to realize that the shell 7 can only move up and down but not rotate in the fixed cylinder 1 , the fixed cylinder 1 has a polygonal cross section, and the outer side wall of the shell 7 fits closely with the fixed cylinder 1 .

[0027] In order to enable the spiral auger 6 at the lower end of the vertical pole to autonomously move downward into the rammed earth layer during use, a horizontal plate 22 is fixed in the shell 7, a flat plate 23 is fixed on the outer side of the upper end of the fixed cylinder 1, and counterweights 24 are placed on both the horizontal plate 22 and the flat plate 23.

[0028] In order to realize simultaneous rotation of the plurality of pulleys 4 , a first motor 25 is connected to one of the bevel gears 11 , and the first motor 25 is fixed to the outside of the fixed cylinder 1 via a fixing plate.

[0029] In order to control the up and down movement of the piston rod, a second motor 26 is fixed to the oil pump 13 . The second motor 26 is a servo motor capable of forward and reverse rotation. The second motor 26 is fixed in the cavity of the housing 7 .

[0030] In order to facilitate the removal of the sample from the circular ring formed by the first arc plate 14 and the second arc plate 16, a horizontal circular plate 27 is provided on the lower side of the oil pump 13. The circular plate 27 is placed in the cavity of the circular ring formed by multiple first arc plates 14 and the second arc plates 16, and the outer edge of the circular plate 27 is in contact with the first arc plates 14 and the second arc plates 16.

[0031] As shown in the figure, the spiral auger 6 in the present device can be of various styles, and two embodiments are listed in the present invention. The spiral auger 6 in this case is to fix the entire device on the upper end of the rammed earth layer, provide support for the first arc plate 14 and the second arc plate 16 to move alternately and gradually downward, eliminating the trouble of hammering.

[0032] It is worth noting that the spiral auger 6 in the present device is designed to anchor the lower end of the vertical shaft 3 firmly into the rammed earth layer, and the simultaneous rotation of the spiral auger 6 on multiple vertical shafts 3 can enable multiple vertical shafts 3 to fix the annular plate 2 and the fixed cylinder 1 on the rammed earth layer; when the torsion spring on the rotating cylinder 8 is not subjected to force, the wedge-shaped surface of the pin shaft 9 is facing forward or backward. In other words, the housing 7 can neither move upward nor downward in the fixed cylinder 1. When the first motor 25 rotates forward, the first motor 25 drives the incomplete gear 10 to rotate 90° via the bevel gear 11. At this time, the bevel gear 11 contacts the toothless part of the incomplete gear 10, and the bevel gear 11 continues to rotate but the incomplete gear 10 cannot rotate. The state of the pin shaft 9 at this time is as follows: Figure 1 As shown, when the first motor 25 rotates in reverse, the first motor 25 drives the incomplete gear 10 to rotate in the opposite direction through the bevel gear 11. When the bevel gear 11 reaches the toothless portion of the incomplete gear 10, the state of the pin shaft 9 at this time is as shown in FIG. Figure 7 shown.

[0033] In order to facilitate operation and flexible handling, the ring composed of the plurality of first curved plates 14 and the plurality of second curved plates 16 can freely pass up and down in the fixed cylinder 1. So far, the device can be seen as two major parts, the first part includes the fixed cylinder 1, the annular plate 2, the vertical shaft 3, and the components thereon, and the second part includes the shell 7 and the reciprocating screw mechanism at its lower end, the first curved plate 14, the second curved plate 16, etc., wherein the shell 7 can be completely withdrawn from the fixed cylinder 1. Of course, in order to facilitate operation, a handle can be installed on the upper end of the shell 7; the lower end of the vertical shaft 3 is in a pointed cone shape; the lower ends of the first curved plate 14 and the second curved plate 16 are both blade structures.

[0034] The first motor 25 and the second motor 26 in the device are both servo motors. When the first motor 25 is started once, the first motor 25 drives the vertical shaft 3 to rotate a fixed number of circles, and just enables the baffle 5 to be in close contact with the upper surface of the rammed earth layer; when the second motor 26 is started once, it rotates forward for several circles and then reverses for several circles, and the cycle is repeated until the circular plate 27 is in close contact with the ground.

[0035] Before use, start the first motor 25 to make the pin 9 in the Figure 1 In the state shown, at this time, both hands hold the annular plate 2 and lift it upward, separate the shell 7 from the fixed cylinder 1 from top to bottom, turn off the first motor 25, and the preparation work is completed; when in use, the annular plate 2 is placed in a suitable position, and the counterweight block 24 is placed on the flat plate 23. At this time, under the action of its own gravity and the counterweight block 24, the lower end of the vertical shaft 3 is inserted into the soil layer, and the first motor 25 is started at this time. The rotation of the first motor 25 drives the multiple pulleys 4 to rotate, and the pulley 4 rotates the vertical shaft 3 to rotate, and the spiral auger 6 structure at the lower end of the vertical shaft 3 rotates, and the multiple spiral auger 6 drives the vertical shaft 3 to drill into the soil layer. When the baffle 5 reaches the ground and is close to the rammed earth surface, the first motor 25 stops rotating; then the shell 7 is placed in the fixed cylinder 1 from top to bottom. When the lower ends of the first curved plate 14 and the second curved plate 16 contact the soil layer and cannot continue to move downward, the second motor 26 is started at this time, and the second motor 26 rotates to drive the oil pump 13 transports the hydraulic oil in the lower chamber of the hydraulic cylinder 12 to the upper chamber, and then moves the piston rod downward. The downward movement of the piston rod drives multiple first curved plates 14 to penetrate into the soil layer first; when the piston reaches the bottom of the hydraulic cylinder 12, the second motor 26 reverses to make the hydraulic oil in the upper chamber enter the lower chamber. At this time, the distance between the first curved plate 14 and the shell 7 is reduced. Because of the wedge block 19 in the first curved plate 14 at this time, the wedge block 19 prevents the first curved plate 14 from moving upward. Combined with the fact that there are many counterweight blocks 24 in the chamber of the shell 7, the above reasons make the first curved plate 14 immobile. In contrast, the hydraulic cylinder 12 moves downward with the shell 7 and the first curved plate 14; when the piston reaches the upper end of the hydraulic cylinder 12, it enters the next cycle again until the first curved plate 14 and the second curved plate 16 are inserted to a suitable depth, and the second motor 26 is disconnected. At this point, the rammed earth layer sample is placed in a ring formed by a plurality of first arc plates 14 and second arc plates 16. At this time, the sample needs to be pulled out of the rammed earth layer intact. Specifically, the first motor 25 is started to reverse, and the plurality of bevel gears 11 drive the plurality of incomplete gears 10 to rotate so that the pin shaft 9 is in Figure 7In the state shown, multiple vertical shafts 3 reverse with multiple spiral augers 6 at their lower ends, and multiple vertical shafts 3 drive the fixed cylinder 1 to move upward through the annular plate 2. At this time, the fixed cylinder 1 drives the shell 7 to move upward through the pin 9. The shell 7 moves upward and drives the numerous first curved plates 14 and second curved plates 16 below it to move upward at the same time through the reciprocating screw mechanism. The wedge-shaped structure on the inner side of the first curved plate 14 and the second curved plate 16 makes the sample firmly controlled in the circular ring formed by the first curved plate 14 and the second curved plate 16. At this point, the sampling is completed.

[0036] When unconfined compression is required, press the circular plate 27 in the cavity of the circular ring formed by the first curved plate 14 and the second curved plate 16 downward for a short distance, and then flatten the lower end of the sample along the horizontal plane. Take a cylindrical container with an opening upward. The inner diameter of the container should be similar to the diameter of the sample. Place the sample directly above the container and press the circular plate 27. The circular plate 27 allows the entire sample to enter the container. At this time, take out the standard ring knife for normal measurement and sampling.

[0037] Of course, if the circular ring formed by multiple first arc plates 14 and second arc plates 16 is consistent with the inner and outer diameters of a standard ring cutter, it is only necessary to flatten the bottom of the sample, remove the loose soil on the top and flatten it so that the thickness is consistent with the thickness of the ring cutter, and then the measurement can be carried out directly, thus eliminating the container described in the previous paragraph.

[0038] As we all know, in the unconfined compression test, when the size of the specimen is too small and the hardness itself is not large, the measured error is large and the accuracy is greatly reduced. Therefore, this device takes out as many samples as possible while ensuring that the original rammed earth layer samples are not disturbed, and the process eliminates the adverse effects of hammering on the wall in traditional sampling. The operation is simple and easy to implement.

[0039] In this invention, in combination with the construction needs of modern rammed earth walls, a new sampling idea is proposed to address the drawbacks of traditional sampling methods: first, a sufficient amount of soil samples are pulled out from the rammed earth layer, at which time the soil samples are consistent with the various data in the rammed earth layer, and then the taken soil samples are shaped and arranged, and placed in a suitable container, and then various sampling work is carried out. In this way, first, the wall can be exempted from damage by hammering, second, there is no need for manpower to dig the soil in the wall, avoiding the compaction density of the next layer, third, sufficient soil samples can be taken out at one time, which is enough to ensure various measurement work, and fourth, the operation is simple, and there is no need for personnel to perform cumbersome operations in the narrow space between the templates.

[0040] The present invention has an ingenious structure. It improves the soil sampling method in view of the actual situation in the process of ramming modern rammed earth walls. It adopts a step-by-step alternating insertion method to take samples in the sampling area, and can pull out sufficient and reliable soil samples at one time, eliminating the quality and safety hazards to the wall caused by repeated hammering, and also eliminating the step of manual soil digging, thereby greatly improving the sampling efficiency, saving labor, time and effort, having strong practicability and being easy to promote.

Claims

1. A rammed earth wall quality sampling device, characterized in that: The invention comprises a vertical fixed cylinder (1), an annular plate (2) is fixed on the outer side of the lower end of the fixed cylinder (1), a plurality of vertical vertical shafts (3) are passed through the annular plate (2), a pulley (4) is fixed on the upper end of the vertical shaft (3), the plurality of pulleys (4) are driven by a belt, a horizontal baffle (5) is fixed in the middle of the vertical shaft (3), and a spiral auger (6) is fixed on the lower half of the vertical shaft (3); a housing (7) that can slide up and down is provided in the fixed cylinder (1), and the housing (7) cannot rotate; a plurality of rotatable rotating cylinders (8) are passed through the side wall of the fixed cylinder (1), the rotating cylinders (8) correspond to the vertical shafts (3) one by one, a torsion spring is installed between the rotating cylinder (8) and the side wall of the fixed cylinder (1), and the rotating cylinders (8) are connected to the fixed cylinder (1). (8) has a pin shaft (9) which can slide along the pin shaft (9), the rotating cylinder (8) can drive the pin shaft (9) to rotate, one end of the pin shaft (9) extends out of the rotating cylinder (8) and is placed in the fixed cylinder (1), the end of the pin shaft (9) in the fixed cylinder (1) is a wedge-shaped surface, the other end of the pin shaft (9) and the rotating cylinder (8) are connected by a compression spring, a plurality of clamping holes matching the wedge-shaped surface are opened on the side wall of the housing (7), the direction of the wedge-shaped surface on the pin shaft (9) can control the housing (7) to move upward or downward, an incomplete gear (10) is fixed on one end of the rotating cylinder (8) placed outside the fixed cylinder (1), and a bevel gear (11) meshing with the incomplete gear (10) is fixed on the upper end of the vertical shaft (3); A vertical hydraulic cylinder (12) is fixed on the lower side of the housing (7). The piston in the hydraulic cylinder (12) divides the cavity into two separate upper and lower chambers. An oil pump (13) is fixed on the lower end surface of the housing (7). The oil pump (13) is connected to the upper and lower chambers through a pipeline. The piston rod in the hydraulic cylinder (12) extends downward. A plurality of vertical first arc plates (14) are arranged around the lower end of the piston rod. The lower end of the piston rod is fixed to the first arc plate (14) through a plurality of fixing rods (15). Two adjacent A second arc plate (16) is disposed between the first arc plates (14); a connecting tube (17) is fixed to the lower end of the hydraulic cylinder (12); the second arc plate (16) and the connecting tube (17) are fixed together via a plurality of connecting rods (18); a plurality of wedge blocks (19) are fixed to the inner side walls of the first arc plates (14) and the second arc plates (16); the lower ends of the inner side surfaces of the wedge blocks (19) are inclined outwardly; the plurality of first arc plates (14) and the plurality of second arc plates (16) can form a complete circular ring.

2. A rammed earth wall quality sampling device according to claim 1, characterized in that: The rotating drum (8) and the pin shaft (9) are matched with each other in a spline structure.

3. A rammed earth wall quality sampling device according to claim 1, characterized in that: The fixing cylinder (1) has a polygonal cross section, and the outer wall of the shell (7) fits the fixing cylinder (1).

4. A rammed earth wall quality sampling device according to claim 3, characterized in that: A transverse plate (22) is fixed inside the housing (7), a flat plate (23) is fixed outside the upper end of the fixed cylinder (1), and counterweights (24) are placed on both the transverse plate (22) and the flat plate (23).

5. A rammed earth wall quality sampling device according to claim 1, characterized in that: A first motor (25) is connected to one of the bevel gears (11), and the first motor (25) is fixed to the outside of the fixed cylinder (1) via a fixed plate.

6. A rammed earth wall quality sampling device according to claim 1, characterized in that: A second motor (26) is fixed on the oil pump (13). The second motor (26) is a servo motor capable of forward and reverse rotation. The second motor (26) is fixed in the cavity of the housing (7).

7. A rammed earth wall quality sampling device according to claim 1, characterized in that: A horizontal circular plate (27) is provided on the lower side of the oil pump (13). The circular plate (27) is placed in a cavity formed by a circular ring of a plurality of first arc-shaped plates (14) and second arc-shaped plates (16). The outer edge of the circular plate (27) is in contact with the first arc-shaped plates (14) and the second arc-shaped plates (16).

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