A device for detecting the compaction degree of fill soil

Abstract

The present invention belongs to the technical field of highway roadbed compaction detection, and particularly relates to a device for detecting the compaction of fill soil, wherein the equipment comprises: a base; a sliding component; a transmission component, wherein the sliding component is used for moving the vertical position, and the transmission component is used for driving the sliding component to complete the movement in the vertical direction; a detection mechanism is provided in the middle of a fixed platform, and the detection mechanism consists of a sliding fixed component, an electric connection component and a detection component, wherein the sliding fixed component and the electric connection component are used for converting a vertical displacement signal into an electric signal, and the detection component is used for identifying the electric signal; through the detection mechanism, a resistor rod is provided, and the current size connected to the detection component and the electric connection component is changed according to the contact point between the resistor rod and the contact rod, so that the displacement change at the sliding fixed component is converted into a change in the vertical position of the electric connection component, and then converted into a change in the current in the detection component, thereby indirectly realizing the detection of soil density.

Description

Technical Field

[0001] The invention belongs to the technical field of highway roadbed compaction detection, and in particular relates to a device for detecting the compaction of fill soil. Background Art

[0002] Compactness is the most important quality control indicator in earthwork engineering. Compactness is also called tamping degree. It refers to the ratio of the dry density of soil or other building materials after compaction to the standard maximum dry density, and is expressed as a percentage. Compactness is one of the key indicators for roadbed and pavement construction quality inspection. It characterizes the density after on-site compaction. The higher the compaction, the greater the density and the better the overall performance of the material. For roadbed, semi-rigid base and granular flexible base, compaction refers to the ratio of the dry density actually achieved on site to the maximum dry density obtained by indoor standard compaction test.

[0003] The traditional method has a slow detection speed, which seriously affects the construction progress of the project. Compared with the traditional fill compaction detection technology, the electromagnetic non-core soil density detection technology has the advantages of fast detection speed, simple operation method, small degree of influence of human factors, accurate and reliable test results, etc. With the development and application of electromagnetic technology, the non-magnetic soil density detection technology has been widely used in earthwork projects.

[0004] The patent with publication number CN109763476A discloses a device and method for quickly detecting the compaction degree of fill roadbed. The device includes: a drop bucket and a drop hammer. The drop hammer is inside the drop bucket. The drop bucket is characterized in that there is a frame and handrail outside the drop bucket, a limit slide and a locking device inside, and a glass scale plate at the bottom. The drop hammer is characterized in that the hammer head is conical, and the rear end can be connected to a calibration rod and a counterweight limit rod. The calibration rod can be connected to the drop hammer by screws, and the counterweight limit rod can be connected to the counterweight. The scheme of the present invention ensures the durability and accuracy of the device and can quickly measure the compaction degree of fill roadbed.

[0005] The traditional method has a slow detection speed, which seriously affects the construction progress of the project. The above method adopts the method of falling hammer observation during detection. Due to the lack of calibration when the falling hammer falls, its falling position cannot be guaranteed to be the same every time, and the falling process is easily affected by external environmental factors such as wind, resulting in excessive errors in the detection value. Therefore, it is necessary to redesign a device to abandon the detection error caused by this traditional detection method. Summary of the invention

[0006] The purpose of the present invention is to provide a device for detecting the compaction degree of fill to solve the problems raised in the above background technology. To achieve the above purpose, the following technical solution is provided: a device for detecting the compaction degree of fill, wherein the device comprises:

[0007] A base is provided with a fixed platform on its upper end, a sliding assembly is slidably provided in the middle of the fixed platform, a transmission assembly is fixedly provided at the left end of the sliding assembly, the sliding assembly is used for moving the vertical position, and the transmission assembly is used for driving the sliding assembly to complete the movement in the vertical direction; a detection mechanism is provided in the middle of the fixed platform, and the detection mechanism consists of a sliding fixed assembly, a power connection assembly and a detection assembly. The sliding fixed assembly and the power connection assembly are used to convert the vertical displacement signal into an electrical signal, and the detection assembly is used for identifying the electrical signal, thereby completing the detection of soil compaction.

[0008] In the present technical scheme, when detecting the compaction degree of soil, a comparative detection method is adopted, firstly, the base is placed horizontally on the soil surface to be detected, and then the transmission component is started; the transmission component is started to drive the sliding component to move downward, and the sliding component moves downward to drive the detection mechanism to move downward, and moves downward to the bottom end of the sliding fixed component to contact the detection soil surface, and then the transmission component continues to start until the sliding component moves down to the final position; when the detection mechanism moves down to the reserved position at the lowest end, due to the different density of the compacted soil, the depth of the bottom end of the sliding fixed component embedded in the soil is different, causing the sliding position of the power connection component and the detection component to change; when the bottom end of the sliding fixed component moves to the cut-off position, due to the different density of the soil at the detection end, the absolute compression amount of the spring changes, causing the sliding contact point of the power connection component in the detection component to change, thereby changing the current size passing through the detection component, thereby comparing the actual measured current size with the calibrated qualified current indication, so as to identify the detected density value.

[0009] In any of the above technical solutions, further, the sliding fixing assembly includes:

[0010] A measuring cylinder, wherein a detection cavity is fixedly provided in the middle thereof, sliding through holes are fixedly provided at the upper and lower end walls of the detection cavity, a positioning slide rod is slidably provided in the sliding through hole, a power connection component is fixedly provided at the lower end of the positioning slide rod, and a detection cone is fixedly provided at the lower end of the power connection component;

[0011] A calibration stress spring is fixedly wound around the upper end of the positioning slide rod, the upper end of the calibration stress spring is fixedly connected to the upper end of the detection cavity, the lower end of the calibration stress spring is fixedly connected to the upper end wall of the electrical box, and the upper end of the positioning slide rod extends outwardly at the outer end of the measuring tube, and the lower end of the detection cone extends outwardly at the lower end of the measuring tube.

[0012] In this technical solution, a detection platform is provided by setting a sliding fixed component, and the sliding fixed component uses the detection principle of a sliding rheostat to convert the vertical moving distance during the detection into a variable current when detecting the soil compaction, so that the detection mechanism can indirectly obtain the approximate soil density at the detection end according to the soil embedding depth of the detection end, thereby realizing the detection of soil compaction.

[0013] In any of the above technical solutions, further, the power connection component includes:

[0014] An electrical connection box is fixedly connected to the middle of the positioning slide rod and the detection cone, and an electrical connection cavity is fixedly provided in the electrical connection box. Horizontal holes are fixedly opened at the left and right end walls of the electrical connection cavity, and contact rods are horizontally slidably provided in the horizontal holes. A retaining spring is fixedly sleeved in the middle of the contact rod, and the two ends of the retaining spring are respectively fixedly connected between the contact rod and the horizontal hole, and an electric signal source is fixedly provided at the lower end wall of the electrical connection cavity, and the electric signal source and the two contact rods are connected through an electrical connection wire.

[0015] In the present technical solution, by setting a power connection component, when the power connection component follows the sliding fixed component to slide vertically up and down, the retaining spring is always in a tensioned state, ensuring that the contact rod always extends from the horizontal hole, thereby ensuring that the power connection component and the detection component can always be connected, ensuring the continuity of the current signal at the detection end.

[0016] In any of the above technical solutions, further, the detection component includes:

[0017] The indicating cavity is fixedly arranged at the upper end of the detection cavity, and an indicating comparison module is fixedly arranged in the indicating cavity. The left and right vertical end walls of the detection cavity are respectively fixedly connected with resistance rods. The resistance rod and the indicating comparison module are connected through a second connecting wire, and the contact rod is always in contact with the resistance rod, so that the indicating comparison module forms a closed loop.

[0018] In the present technical solution, a platform for sliding variable group is provided by setting a resistance rod, so that the current size in the access detection component and the power connection component is changed according to the contact point between the resistance rod and the contact rod, and the displacement change at the sliding fixed component is converted into a change in the vertical position of the power connection component. The displacement change is converted into a change in the current in the detection component through the resistance rod, making it possible to indirectly detect the soil density by comparing the change in current.

[0019] In any of the above technical solutions, further, the sliding assembly includes:

[0020] A vertical through groove is fixedly provided in the middle of the fixed platform, a vertical slider is slidably provided in the vertical through groove, and a measuring cylinder is fixedly connected to the middle of the vertical slider, a horizontal plate is fixedly provided at the lower end of the measuring cylinder, and a threaded hole is provided on the horizontal plate;

[0021] Optimized transmission components include:

[0022] The motor is fixedly arranged at the left end of the upper end surface of the fixed platform, a gear is arranged at the rotating end of the motor, a limited rotation groove is arranged in the fixed platform, a threaded rod is rotatably arranged in the limited rotation groove, the middle part of the threaded rod is slidably embedded in the limited rotation groove, the lower end of the threaded rod is threadedly connected to the threaded hole, and a driven gear is fixedly arranged at the upper end of the threaded rod, and the driven gear is transmitted to the motor gear.

[0023] In the present technical solution, the starting motor drives the fixed gear at the rotating end of the driven gear to perform external meshing transmission with the driven gear to realize the rotation of the threaded rod. When the threaded rod rotates, the lower end of the threaded rod and the cross plate perform threaded transmission, driving the sliding assembly to move downward as a whole. When the sliding assembly moves downward, the sliding assembly drives the detection mechanism to move, thereby ensuring the continuous detection.

[0024] An operating method of a device for detecting the compaction degree of fill:

[0025] Step 1: First, place the base horizontally on the soil surface to be tested, and then start the transmission assembly;

[0026] Step 2: The transmission component starts to drive the sliding component to move downward, and the sliding component moves downward to drive the detection mechanism to move downward until the bottom end of the sliding fixed component contacts the detection soil surface, and then the transmission component continues to start until the sliding component moves downward to the final position;

[0027] Step 3: When the detection mechanism moves down to the reserved position at the bottom, due to the different densities of the compacted soil, the depth of the bottom of the sliding fixed component embedded in the soil varies, causing the sliding positions of the power connection component and the detection component to change;

[0028] Step 4: When the bottom end of the sliding fixed component moves to the cut-off position, the absolute compression amount of the calibrated stress spring changes due to the different density of the soil at the detection end, causing the sliding contact point of the power connection component in the detection component to change, thereby changing the current size passing through the detection component. The actual measured current size is compared with the calibrated current indication to identify the detected density value.

[0029] The beneficial effects of the present invention are as follows: through the detection mechanism, a platform for sliding variable groups is provided through the resistance rod, so that the current size in the access detection component and the power connection component is changed according to the contact point between the resistance rod and the contact rod, and the displacement change at the sliding fixed component is converted into a change in the vertical position of the power connection component. The displacement change is converted into a change in the current in the detection component via the resistance rod, so that the soil density is indirectly detected by comparing the change in current. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the detection mechanism in the present invention;

[0032] Figure 3 is a schematic diagram of the power connection assembly in the present invention;

[0033] Figure 4 yes Figure 3 Schematic diagram of the middle AA;

[0034] Figure 5 It is a three-dimensional schematic diagram of the contact rod in the present invention.

[0035] The reference numerals in the figure are: 100, base; 101, fixed platform; 200, sliding assembly; 201, vertical through groove; 202, vertical slider; 203, horizontal plate; 204, threaded hole; 300, transmission assembly; 301, motor; 302, limit rotation groove; 303, threaded rod; 304, driven gear; 400, detection mechanism; 500, sliding fixed assembly; 501, measuring cylinder; 502, detection cavity; 503 , sliding through hole; 504, positioning slide rod; 505, calibration stress spring; 506, detection cone; 600, power connection assembly; 601, power connection box; 602, power connection cavity; 603, horizontal hole; 604, contact rod; 605, retaining spring; 606, electrical signal source; 607, power connection wire; 700, detection assembly; 701, indication cavity; 702, indication comparison module; 703, resistance rod; 704, second connecting wire. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0037] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] Embodiment 1:

[0039] like Figure 1 As shown, this embodiment provides a device for detecting the compaction degree of fill, wherein the device includes:

[0040] A base 100 is fixedly provided with a fixed platform 101 at its upper end, a sliding assembly 200 is slidably provided in the middle of the fixed platform 101, a transmission assembly 300 is fixedly provided at the left end of the sliding assembly 200, the sliding assembly 200 is used for moving in the vertical position, and the transmission assembly 300 is used for driving the sliding assembly 200 to complete the movement in the vertical direction; a detection mechanism 400 is provided in the middle of the fixed platform 101, and the detection mechanism 400 is composed of a sliding fixed assembly 500, a power connection assembly 600 and a detection assembly 700, the sliding fixed assembly 500 and the power connection assembly 600 are used to convert the vertical displacement signal into an electrical signal, and the detection assembly 700 is used for identifying the electrical signal, thereby completing the detection of soil compaction.

[0041] In the present technical solution, when testing the compaction degree of soil, a comparative testing method is adopted. First, the base 100 is placed horizontally on the soil surface to be tested, and then the transmission component 300 is started; the transmission component 300 is started to drive the sliding component 200 to move downward, and the sliding component 200 moves downward to drive the detection mechanism 400 to move downward until the bottom end of the sliding fixed component 500 contacts the test soil surface, and then the transmission component 300 continues to start until the sliding component 200 moves down to the final position; when the detection mechanism 400 moves down to the reserved position at the bottom, due to the compaction degree of the soil, the detection mechanism 400 moves downward to the final position. The depth of the bottom of the sliding fixed component 500 embedded in the soil is different, so the depth of the bottom of the sliding fixed component 500 embedded in the soil is different, causing the sliding position of the power connection component 600 and the detection component 700 to change; when the bottom of the sliding fixed component 500 moves to the cut-off position, due to the different density of the soil at the detection end, the absolute compression amount of the spring therein changes, causing the sliding contact point of the power connection component 600 in the detection component 700 to change, thereby changing the current size passing through the detection component 700, thereby comparing the actual current size with the calibrated qualified current indication, so as to identify the detected density value.

[0042] like Figure 2 As shown, specifically, the sliding fixing assembly 500 includes:

[0043] The measuring cylinder 501 has a detection cavity 502 fixedly disposed in the middle thereof, and sliding holes 503 fixedly disposed at the upper and lower end walls of the detection cavity 502, and a positioning slide bar 504 slidingly disposed in the sliding hole 503, and a power connection component 600 fixedly disposed at the lower end of the positioning slide bar 504, and a detection cone 506 fixedly disposed at the lower end of the power connection component 600;

[0044] A calibration stress spring 505 is fixedly wound around the upper end of the positioning slide bar 504, and the upper end of the calibration stress spring 505 is fixedly connected to the upper end of the detection cavity 502, and the lower end of the calibration stress spring 505 is fixedly connected to the upper end wall of the power connection box 601, and the upper end of the positioning slide bar 504 extends outward at the outer end of the measuring tube 501, and the lower end of the detection cone 506 extends outward at the lower end of the measuring tube 501.

[0045] In this technical solution, a detection platform is provided by the sliding fixed component 500, and the sliding fixed component 500 uses the detection principle of the sliding rheostat to convert the vertical moving distance during the detection into a variable current when detecting the soil compaction, so that the detection mechanism 400 can indirectly obtain the approximate soil density at the detection end according to the soil embedding depth of the detection end, thereby realizing the detection of soil compaction.

[0046] In a preferred embodiment of the present invention:

[0047] like Figure 3 ,4 As shown, specifically, the power connection component 600 includes:

[0048] The power connection box 601 is fixedly connected to the middle of the positioning slide bar 504 and the detection cone 506. A power connection chamber 602 is fixedly provided in the power connection box 601. Horizontal holes 603 are fixedly opened at the left and right end walls of the power connection chamber 602. Contact rods 604 are horizontally slidably arranged in the horizontal holes 603. A retaining spring 605 is fixedly sleeved in the middle of the contact rod 604. Both ends of the retaining spring 605 are fixedly connected between the contact rod 604 and the horizontal hole 603. An electric signal source 606 is fixedly provided at the lower end wall of the power connection chamber 602. The electric signal source 606 and the two contact rods 604 are connected through an electric connection wire 607.

[0049] In the present technical solution, by setting the power connection component 600, when the power connection component 600 follows the sliding fixing component 500 to slide vertically up and down, the retaining spring 605 is always in a tensioned state, ensuring that the contact rod 604 always extends from the horizontal hole 603, thereby ensuring that the power connection component 600 and the detection component 700 can always be connected, ensuring the continuity of the current signal at the detection end.

[0050] In a preferred embodiment of the present invention:

[0051] like Figure 2 , 5 As shown, specifically, the detection component 700 includes:

[0052] The indicating cavity 701 is fixedly arranged at the upper end of the detection cavity 502, and an indicating comparison module 702 is fixedly arranged in the indicating cavity 701. The left and right vertical end walls of the detection cavity 502 are respectively fixedly connected with a resistance rod 703. The resistance rod 703 and the indicating comparison module 702 are connected through a second connecting wire 704, and the contact rod 604 is always in contact with the resistance rod 703, so that the indicating comparison module 702 forms a closed loop.

[0053] In the present technical solution, a platform for sliding group change is provided by setting a resistance rod 703, so that the current size in the access detection component 700 and the power connection component 600 is changed according to the contact point between the resistance rod 703 and the contact rod 604, and the displacement change at the sliding fixed component 500 is converted into a change in the vertical position of the power connection component 600. The displacement change is converted into a change in the current in the detection component 700 via the resistance rod 703, making it possible to indirectly detect the soil density by comparing the change in current.

[0054] In a preferred embodiment of the present invention:

[0055] like Figure 1 As shown, specifically, the sliding assembly 200 includes:

[0056] A vertical through slot 201 is fixedly provided in the middle of the fixed platform 101. A vertical slider 202 is slidably provided in the vertical through slot 201. A measuring cylinder 501 is fixedly connected to the middle of the vertical slider 202. A horizontal plate 203 is fixedly provided at the lower end of the measuring cylinder 501. A threaded hole 204 is provided on the horizontal plate 203.

[0057] Specifically, the transmission assembly 300 includes:

[0058] The motor 301 is fixedly arranged at the left end of the upper end surface of the fixed platform 101, and a gear is provided at the rotating end of the motor 301. A limit rotation groove 302 is opened in the fixed platform 101, and a threaded rod 303 is rotatably arranged in the limit rotation groove 302. The middle part of the threaded rod 303 is slidably embedded in the limit rotation groove 302, and the lower end of the threaded rod 303 is threadedly connected in the threaded hole 204. A driven gear 304 is fixedly arranged at the upper end of the threaded rod 303, and the driven gear 304 is gear-transmitted with the motor 301.

[0059] In the present technical solution, the starting motor 301 drives the gear fixed at the rotating end of the driven gear 304 to perform external meshing transmission with the driven gear 304 to realize the rotation of the threaded rod 303. When the threaded rod 303 rotates, the lower end of the threaded rod 303 and the cross plate 203 are threadedly transmitted, driving the sliding assembly 200 to move downward as a whole. When the sliding assembly 200 moves downward, the sliding assembly 200 drives the detection mechanism 400 to move, thereby ensuring the continuous detection.

[0060] An operating method of a device for detecting the compaction degree of fill:

[0061] Step 1: firstly, place the base 100 horizontally on the soil surface to be tested, and then start the transmission assembly 300;

[0062] Step 2: The transmission assembly 300 starts to drive the sliding assembly 200 to move downward, and the sliding assembly 200 moves downward to drive the detection mechanism 400 to move downward until the bottom end of the sliding fixing assembly 500 contacts the detection soil surface, and then the transmission assembly 300 continues to start until the sliding assembly 200 moves downward to the final position;

[0063] Step 3: When the detection mechanism 400 moves down to the reserved position at the bottom, due to the different densities of the compacted soil, the bottom end of the sliding fixing component 500 is embedded in the soil at different depths, causing the sliding positions of the power connection component 600 and the detection component 700 to change;

[0064] Step 4: When the bottom end of the sliding fixing component 500 moves to the cut-off position, due to the different density of the soil at the detection end, the absolute compression amount of the calibrated stress spring 505 changes, causing the sliding contact point of the power connection component 600 in the detection component 700 to change, thereby changing the current size passing through the detection component 700, thereby comparing the actual measured current size with the calibrated qualified current indication to identify the detected density value.

[0065] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A device for detecting the compaction degree of fill, characterized in that: include: A base (100) is fixedly provided with a fixed platform (101) at its upper end, a sliding assembly (200) is slidably provided in the middle of the fixed platform (101), a transmission assembly (300) is fixedly provided at the left end of the sliding assembly (200), the sliding assembly (200) is used to drive the vertical position of the detection mechanism (400) to move, and the transmission assembly (300) is used to drive the sliding assembly (200) to complete the movement in the vertical direction; a detection mechanism (400) is provided in the middle of the fixed platform (101), and the detection mechanism (400) is composed of a sliding fixed assembly (500), an electrical connection assembly (600) and a detection assembly (700), the sliding fixed assembly (500) and the electrical connection assembly (600) are used to convert the vertical displacement signal into an electrical signal, and the detection assembly (700) is used to identify the electrical signal, thereby completing the detection of soil compaction; The sliding fixing assembly (500) comprises: A measuring cylinder (501) is fixedly provided with a detection cavity (502) in its middle, a sliding through hole (503) is fixedly provided at the upper and lower end walls of the detection cavity (502), a positioning slide bar (504) is slidably provided in the sliding through hole (503), a power connection component (600) is fixedly provided at the lower end of the positioning slide bar (504), and a detection cone (506) is fixedly provided at the lower end of the power connection component (600); The power connection assembly (600) comprises: An electrical connection box (601) is fixedly connected to the middle of the positioning slide bar (504) and the detection cone (506); an electrical connection chamber (602) is fixedly provided in the electrical connection box (601); horizontal holes (603) are fixedly provided at the left and right end walls of the electrical connection chamber (602); contact rods (604) are horizontally slidably provided in the horizontal holes (603); a retaining spring (605) is fixedly sleeved at the middle of the contact rod (604); the two ends of the retaining spring (605) are fixedly connected between the contact rod (604) and the horizontal hole (603); an electrical signal source (606) is fixedly provided at the lower end wall of the electrical connection chamber (602); the electrical signal source (606) and the two contact rods (604) are connected via an electrical connection wire (607); Wherein, a calibration stress spring (505) is fixedly wound around the upper end of the positioning slide bar (504), the upper end of the calibration stress spring (505) is fixedly connected to the upper end of the detection chamber (502), the lower end of the calibration stress spring (505) is fixedly connected to the upper end wall of the power connection box (601), and the upper end of the positioning slide bar (504) extends outward from the outer end of the measuring tube (501), and the lower end of the detection cone (506) extends outward from the lower end of the measuring tube (501); The detection component (700) comprises: The indicating cavity (701) is fixedly arranged at the upper end of the detection cavity (502), and the indicating cavity (701) is fixedly provided with an indicating comparison module (702). The left and right vertical end walls of the detection cavity (502) are respectively fixedly connected with resistance rods (703), the resistance rod (703) and the indicating comparison module (702) are connected via a second connecting wire (704), and the contact rod (604) is always in contact with the resistance rod (703), so that the indicating comparison module (702) forms a closed loop.

2. A device for detecting the compaction degree of fill according to claim 1, characterized in that: The sliding assembly (200) comprises: A vertical through groove (201) is fixedly provided in the middle of the fixed platform (101), a vertical slider (202) is slidably provided in the vertical through groove (201), and the measuring cylinder (501) is fixedly connected to the middle of the vertical slider (202), a horizontal plate (203) is fixedly provided at the lower end of the measuring cylinder (501), and a threaded hole (204) is provided on the horizontal plate (203).

3. A device for detecting the compaction degree of fill according to claim 2, characterized in that: The transmission assembly (300) comprises: The motor (301) is fixedly arranged at the left end of the upper end surface of the fixed platform (101), and a gear is arranged at the rotating end of the motor (301). A limit rotation groove (302) is provided in the fixed platform (101), and a threaded rod (303) is rotatably arranged in the limit rotation groove (302). The middle part of the threaded rod (303) is slidably embedded in the limit rotation groove (302), and the lower end of the threaded rod (303) is threadedly connected to the threaded hole (204). A driven gear (304) is fixedly arranged at the upper end of the threaded rod (303), and the driven gear (304) is gear-driven with the motor (301).

4. An operating method for the device for detecting the compaction degree of fill as claimed in claim 3, characterized in that: Step 1: firstly, place the base (100) horizontally on the soil surface to be tested, and then start the transmission assembly (300); Step 2: The transmission component (300) is started to drive the sliding component (200) to move downward, and the sliding component (200) moves downward to drive the detection mechanism (400) to move downward until the bottom end of the sliding fixing component (500) contacts the detection soil surface, and then the transmission component (300) continues to start until the sliding component (200) moves downward to the final position; Step 3: When the detection mechanism (400) moves down to the reserved position at the bottom, due to the different densities of the compacted soil, the bottom end of the sliding fixing component (500) is embedded in the soil at different depths, causing the sliding positions of the power connection component (600) and the detection component (700) to change; Step 4: When the bottom end of the sliding fixing component (500) moves to the cut-off position, the soil density at the detection end is different, so that the absolute compression amount of the calibration stress spring (505) changes, causing the sliding contact point of the power connection component (600) in the detection component (700) to change, thereby changing the current size passing through the detection component (700), thereby comparing the actual measured current size with the calibrated qualified current indication, and identifying the detected density value.

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