Backfill soil compactness portable detection assembly and method based on high-frequency vibration

Abstract

The invention relates to the technical field of backfill compaction degree detection, in particular to a backfill compaction degree portable detection assembly and method based on high-frequency vibration, and the backfill compaction degree portable detection assembly comprises a hollow outer gear with a ventilation hole in the top, and the inner side of the hollow outer gear is slidably connected with a plurality of evenly-arranged sliding rods. The bottom end and the top end of the sliding rod are fixedly connected with a lower probing piece and a top plate respectively, the hollow outer gear is hollow and used for increasing the detection coverage area and reducing the soil penetrating surface of the lower probing piece, the detection representativeness can be improved by increasing the detection sample coverage area, and the strength of downward pressure provided by the driving box can be reduced by reducing the soil penetrating surface of the lower probing piece; after the downward probing piece reaches the set depth, the driving box provides downward pressure which is gradually reduced until the downward pressure is not enough to support the downward probing piece to continue downward probing, the downward pressure can be detected by the downward probing piece detection stopping mechanism, the downward pressure of the driving box at the moment is recorded and compared with the downward pressure of the downward probing piece under the standard backfill soil compactness, and the downward probing accuracy is improved. Comparison detection of the compaction degree is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of backfill soil compaction degree detection, and specifically to a portable detection component and method for backfill soil compaction degree based on high-frequency vibration. Background Art

[0002] Improper selection of backfill soil compaction methods, non-compliance of compaction degree, etc. will cause diseases such as cracks, settlements, and looseness on the bearing surface. Only after the subgrade is fully compacted can the strength of the bearing surface be ensured, the bearing capacity of the bearing surface be enhanced, and deformation be reduced, such as cement surfaces and asphalt pavements for the bearing surface.

[0003] Currently, existing compaction degree detection methods include the core drilling method, sand filling method, etc. However, the above methods have problems such as low efficiency. Different from the bearing surface, backfill soil has a large vertical span, and there are also significant differences in compaction degree between different thickness intervals. Any problem with the compaction degree at any vertical position will affect the bearing capacity of the bearing surface, and existing compaction degree detection methods cannot detect the compaction degree at different vertical positions.

[0004] The rotation of the eccentric wheel will generate vibration. Utilizing this vibration can provide a continuous downward pressure. When the downward pressure acts on different vertical layers within the backfill soil, if the compaction degrees of different vertical layers are different, the generated downward pressure for subsidence will also be different. The present invention realizes the comparative detection of the compaction degree at different vertical positions through this feature.

[0005] Therefore, in view of the above problems, a portable detection component and method for backfill soil compaction degree based on high-frequency vibration are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a portable detection component and method for backfill soil compaction degree based on high-frequency vibration to solve the problem of "different from the bearing surface, backfill soil has a large vertical span, and there are also significant differences in compaction degree between different thickness intervals. Any problem with the compaction degree at any vertical position will affect the bearing capacity of the bearing surface, and existing compaction degree detection methods cannot detect the compaction degree at different vertical positions" proposed in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A portable detection component for backfill soil compaction degree based on high-frequency vibration, including a hollow outer housing with ventilation holes at the top. A plurality of uniformly arranged sliding rods are slidably connected inside the hollow outer housing. The bottom end and the top end of the sliding rod are respectively fixedly connected with a downward probe and a top plate. The top end of the top plate is fixedly connected with a driving box, and the driving box is used to provide a downward pressure for the downward probe; the hollow of the hollow outer housing is used to increase the detection coverage area while reducing the soil entry surface of the downward probe. Increasing the detection sample coverage area can increase the detection representativeness, and reducing the soil entry surface of the downward probe can reduce the intensity of the downward pressure provided by the driving box; The bottom end of the probing member is in the shape of a "blade", and the "blade" is relatively blunt, which is used to increase the extrusion force to both sides when the probing member probes downward. The probing member can perform independent downward probing at different depths of the backfill soil. The ability of the probing member to perform independent downward probing can ensure that no matter how deep the backfill soil is detected, the friction area when the probing member probes downward is constant, guaranteeing the accuracy during compaction degree detection. The cross-sections of the probing member and the hollow outer sleeve are both rectangular, and the inner and outer edges of the probing member and the hollow outer sleeve are aligned vertically.

[0008] The present invention can significantly improve the efficiency of detecting the compaction degree of backfill soil and can achieve layered compaction degree detection, which is simple and efficient.

[0009] The portable detection assembly further includes a probing member stop detection mechanism. The probing member stop detection mechanism includes a connection box fixedly connected to the right side of the top end of the hollow outer sleeve, a connection shaft rotatably connected to the inner side of the connection box, a sensing member fixedly connected to the rear end of the connection box, and a side plate fixedly connected to the right side of the top plate. After the probing member reaches the set depth, the driving box provides a gradually decreasing downward pressure. When the downward pressure is not sufficient to support the probing member to continue probing downward, it will be detected by the probing member stop detection mechanism, and the downward pressure of the driving box at this time is recorded and compared with the downward pressure at which the probing member cannot probe under the standard compaction degree of the backfill soil to achieve the comparison detection of the compaction degree.

[0010] Preferably, as the portable detection assembly for the compaction degree of backfill soil based on high-frequency vibration of the present invention, the sensing member is an angular velocity sensor. The input end of the angular velocity sensor is fixedly connected to one end of the connection shaft. The probing member stop detection mechanism further includes a wire reel fixedly connected to the outside of the connection shaft. A connection rope is fixedly wound around the outside of the wire reel, and the other end of the connection rope passes through the inside of the connection box and is fixedly connected to the bottom end of the side plate.

[0011] Preferably, as the portable detection assembly for the compaction degree of backfill soil based on high-frequency vibration of the present invention, a connection ring is fixedly connected to the inside of the connection box, and a hairspring is arranged inside the connection ring. The two ends of the hairspring are respectively fixedly connected to the inside of the connection ring and the outside of the connection shaft. At the initial stage of detection, the top plate is separated from the top end of the hollow outer sleeve, and the hairspring is in a state of storing energy. When the probing member descends, the hairspring drives the connection shaft to rotate clockwise to reset. The clockwise rotation of the connection shaft can be sensed by the angular velocity sensor and recorded as a positive angular velocity. Angular velocity is a vector. When the positive angular velocity remains 0 within half a minute, it indicates that the downward pressure is not sufficient to support the probing member to continue probing downward. Among them, because the driving box will generate vibrations during operation, the vibrations may cause short-term floating of the probing member. During floating, the connection shaft rotates counterclockwise, and the angular velocity sensor generates a negative angular velocity, and the controller does not record the generated negative angular velocity.

[0012] Preferably, as the portable detection component for the compactness of backfill soil based on high-frequency vibration of the present invention, the sensing member is a revolution counter. One end of the connecting shaft is fixedly connected to the input end of the revolution counter. There is a certain damping force between the connecting shaft and the connecting box. The downward detection member stop detection mechanism further includes a wire reel rotatably connected to the outside of the connecting shaft. A friction plate is fixedly connected to the bottom end of the side plate. The friction plate extends downward into the inside of the connecting box and fits against the outside of the wire reel. The up and down movement of the downward detection member can drive the wire reel to rotate reciprocally through the friction plate.

[0013] Preferably, as the portable detection component for the compactness of backfill soil based on high-frequency vibration of the present invention, a ratchet is fixedly connected to the outside of the connecting shaft. The sensitivity of the ratchet and the pawl working can be increased by increasing the density of the ratchet. The inside of the wire reel is rotatably connected to a pawl through a hinge. A torsion spring is fixedly connected between the pawl and the inside of the wire reel. When the downward detection member moves downward, the pawl catches on the ratchet and drives the connecting shaft to rotate. At this time, the revolution counter counts. When the downward detection member moves upward, the pawl will slide over the ratchet. The ratchet and the pawl are used to filter out the upward jitter that occurs when the drive box drives the downward detection member to work. When the reading of the revolution counter no longer increases within half a minute, it indicates that the downward pressure is not sufficient to support the downward detection member to continue to descend.

[0014] Under the above settings, when the downward detection member moves downward, it drives the friction plate to move downward. The friction plate drives the wire reel to rotate clockwise. The pawl catches on the ratchet and drives the connecting shaft to rotate. At this time, the revolution counter counts. When the reading of the revolution counter no longer increases within half a minute, it indicates that the downward pressure is not sufficient to support the downward detection member to continue to descend.

[0015] Preferably, as the portable detection component for the compactness of backfill soil based on high-frequency vibration of the present invention, pressure plates are fixedly connected to the outer sides of the front and rear ends of the hollow outer file. The hollow outer file is operated through the pressure plates. A controller is fixedly connected to the top end of the drive box. A drive motor is fixedly connected to the inner side of the top end of the drive box. The drive motor is a constant-speed motor. The end of the main shaft of the drive motor is fixedly connected to a first bevel gear. Support rings are fixedly connected to the inner sides of the left and right ends of the drive box. A second bevel gear is rotatably connected to the inner side of the top end of each support ring through a rotating shaft. The left and right second bevel gears are respectively meshed with the left and right sides of the first bevel gear, so that the left and right second bevel gears rotate in opposite directions.

[0016] Preferably, for the portable detection component of the compactness of backfill soil based on high-frequency vibration of the present invention, each second bevel gear is coaxially and fixedly connected with an eccentric wheel. The eccentric directions of the two eccentric wheels are opposite, and the eccentric direction of the eccentric wheel is perpendicular to the long side of the hollow outer file. By increasing the long side area, the jitter in the eccentric direction is reduced. When the eccentric wheel rotates, it generates a downward pressure on the drive box. When the rectangular hollow outer file is inserted downward, it can effectively play a limiting role and increase the verticality during the downward penetration; the eccentric directions of the two eccentric wheels are opposite, and the rotation directions of the two eccentric wheels are also opposite. This setting is used to reduce the jitter in the eccentric direction, increase the jitter in the up and down directions, and increase the downward pressure.

[0017] Preferably, for the portable detection component of the compactness of backfill soil based on high-frequency vibration of the present invention, a chute is provided inside the eccentric wheel, and a slider is slidably connected inside the chute. The downward pressure of the drive box is changed by changing the position of the slider in the chute. A second motor is fixedly connected inside the slider, and the end of the main shaft of the second motor is fixedly connected with a screw rod. The outside of the screw rod is helically connected with the inside of the slider. The position adjustment of the slider is realized by the rotation of the second motor.

[0018] Preferably, for the portable detection component of the compactness of backfill soil based on high-frequency vibration of the present invention, a potentiometer is fixedly connected to the inner edge of the chute, and a synchronous block is fixedly connected to the center position of the edge of the slider. The synchronous block slides on the potentiometer, and the specific position of the slider is obtained through the potentiometer.

[0019] The method for detecting the compactness of backfill soil based on high-frequency vibration comprises the following steps: Step 1: The detection component is inserted into the depth of the backfill soil to be detected by operating the pressing plate, that is, the downward probe reaches the detection depth. At this time, during the insertion process, the top end of the downward probe will be in interference contact with the bottom end of the hollow outer file.

[0020] Step 2: In the initial position, the slider is at the end position far from the axis in the chute. The drive box starts to work, and the drive box generates a downward pressure to make the downward probe descend. During this process, the position of the slider is continuously changed by the second motor, so that the position of the slider gradually approaches the axis, and the drive box provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the downward probe to continue descending and the downward probe stops and is detected by the detection mechanism.

[0021] Step 3: The position of the slider in the chute is obtained and recorded through the potentiometer when the downward probe stop detection mechanism detects that the downward probe stops in Step 2.

[0022] Step 4: The detection component is placed under the standard compactness of the backfill soil for detection, and the above Steps 2 to 3 are repeated to obtain and record the position of the slider in the chute when the detection component is detected under the standard compactness of the backfill soil.

[0023] Step 5: Define the distance of the slider from the axis in Step 3 as S2, and the distance of the slider from the axis in Step 4 as S1. When S2 is greater than S1, it indicates that the detected compactness of the backfill soil is greater than the standard compactness of the backfill soil. When S2 is less than S1, it indicates that the detected compactness of the backfill soil is less than the standard compactness of the backfill soil.

[0024] In actual operation, Step 4 and the detection of S1 can be completed first, and then the detection of detection points at different depths can be carried out again. The present invention is powered by an external power supply.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For the portable detection component for the compactness of backfill soil based on high-frequency vibration, the bottom end of the downhole probe is in a "blade" shape, and the bottom end of the downhole probe is in a "blade" shape, and the "blade" is relatively blunt, so as to increase the extrusion force to both sides when the downhole probe descends. The downhole probe can descend separately at different depths of the backfill soil. The downhole probe can descend separately, which can ensure that no matter how deep the backfill soil is detected, the friction area received by the downhole probe during descent is constant, ensuring the accuracy during the compactness detection. The cross-sections of the downhole probe and the hollow outer file are both rectangular.

[0026] 2. For the portable detection component for the compactness of backfill soil based on high-frequency vibration, the downhole probe stop detection mechanism includes a connection box fixedly connected to the right side of the top end of the hollow outer file, a connection shaft rotatably connected to the inner side of the connection box, an induction member fixedly connected to the rear end of the connection box, and a side plate fixedly connected to the right side of the top plate. After the downhole probe reaches the set depth, the drive box provides a gradually decreasing downward pressure. When the downward pressure is not sufficient to support the continuous descent of the downhole probe, it will be detected by the downhole probe stop detection mechanism, and the downward pressure of the drive box at this time is recorded and compared with the downward pressure at which the downhole probe cannot descend under the standard compactness of the backfill soil to achieve the comparison detection of the compactness.

[0027] 3. For the portable detection component for the compactness of backfill soil based on high-frequency vibration, at the initial stage of detection, the top plate is separated from the top end of the hollow outer file, and the spring is in a state of storing energy. When the downhole probe descends, the spring drives the connection shaft to rotate clockwise to reset. The clockwise rotation of the connection shaft can be sensed by the angular velocity sensor and recorded as the positive angular velocity. When the positive angular velocity continues to be 0 within half a minute, it indicates that the downward pressure is not sufficient to support the continuous descent of the downhole probe. Among them, because the drive box will generate vibrations during operation, the vibrations may cause the short-term floating of the downhole probe. During floating, the connection shaft rotates counterclockwise, and the angular velocity sensor generates a negative angular velocity, and the controller does not record the generated negative angular velocity.

[0028] 4. For the portable detection component for the compactness of backfill soil based on high-frequency vibration, when the downward probe moves downward, it drives the friction plate to move downward. The friction plate drives the wire reel to rotate clockwise. The pawl catches on the ratchet and drives the connecting shaft to rotate. At this time, the revolution counter counts. When the reading of the revolution counter no longer increases within half a minute, it indicates that the downward pressure is not sufficient to support the continued downward movement of the downward probe.

[0029] 5. For the portable detection component for the compactness of backfill soil based on high-frequency vibration, the eccentric direction of the eccentric wheel is perpendicular to the long side of the hollow outer file. By increasing the area of the long side, the jitter in the eccentric direction is reduced. When the eccentric wheel rotates, it generates a downward pressure on the drive box. When the rectangular hollow outer file moves downward, it can effectively play a limiting role and increase the verticality during the downward movement; the eccentric directions of the two eccentric wheels are opposite, and the rotation directions of the two eccentric wheels are also opposite. This setting is used to reduce the jitter in the eccentric direction, increase the jitter in the up and down direction, and increase the downward pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall external structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the external structure of the downward probe of the present invention.

[0032] Figure 3 It is a schematic diagram of the overall sectional structure of the present invention.

[0033] Figure 4 For the present invention Figure 3 The schematic diagram of the installation structure at position A.

[0034] Figure 5 For the present invention Figure 3 The schematic diagram of the installation structure at position B.

[0035] Figure 6 It is a schematic diagram of the directions of the eccentric wheels on the front and rear sides of the present invention.

[0036] Figure 7 It is a schematic diagram of the installation structure inside the eccentric wheel of the present invention.

[0037] Figure 8 For the present invention Figure 7 The schematic diagram of the installation structure at position C.

[0038] Figure 9 It is a schematic diagram of the installation structure at the wire reel in the first embodiment of the present invention.

[0039] Figure 10 It is a schematic diagram of the installation structure at the internal spring of the connecting ring in the first embodiment of the present invention.

[0040] Figure 11Schematic diagram of the installation structure at the friction plate in the second embodiment of the present invention.

[0041] Figure 12 Schematic diagram of the installation structure at the wire reel in the second embodiment of the present invention.

[0042] Figure 13 Schematic diagram of the installation structure at the ratchet wheel in the second embodiment of the present invention.

[0043] Figure 14 For the present invention Figure 11 Schematic diagram of the installation structure at location D.

[0044] Figure 15 Schematic diagram of the structure in the initial stage of detection of the present invention.

[0045] Figure 16 Schematic diagram of the structure during the detection process of the present invention.

[0046] In the figure: 1, hollow outer file; 2, downward probe; 3, pressing plate; 4, top plate; 5, sliding rod; 6, driving box; 7, controller; 8, side plate; 9, connection box; 10, sensing part; 11, ventilation hole; 12, driving motor; 13, first bevel gear; 14, support ring; 15, pawl; 16, torsion spring; 17, connecting rope; 18, wire reel; 19, connecting shaft; 20, eccentric wheel; 21, second bevel gear; 22, connecting ring; 23, spring; 24, backfill soil; 25, ratchet wheel; 26, friction plate; 201, second motor; 202, chute; 203, screw; 204, potentiometer; 205, slider; 206, synchronous block. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Embodiment 1, please refer to Figures 1-10 , Figure 15 and Figure 16 , the present invention provides a technical solution: Portable detection component and method for compactness of backfill soil based on high-frequency vibration. The portable detection component for compactness of backfill soil based on high-frequency vibration includes a hollow outer sleeve 1 with air holes 11 at the top. A plurality of uniformly arranged sliding rods 5 are slidably connected to the inner side of the hollow outer sleeve 1. The bottom end and the top end of the sliding rod 5 are fixedly connected with a downward probe 2 and a top plate 4 respectively. The top end of the top plate 4 is fixedly connected with a driving box 6, and the driving box 6 is used to provide a downward pressure for the downward probe 2. The hollow of the hollow outer sleeve 1 is used to increase the detection coverage area while reducing the soil entry surface of the downward probe 2. Increasing the detection sample coverage area can increase the detection representativeness, and reducing the soil entry surface of the downward probe 2 can reduce the intensity of the downward pressure provided by the driving box 6.

[0049] The bottom end of the downward probe 2 is in a "blade" shape, and the bottom end of the downward probe 2 is in a "blade" shape and the "blade" is relatively blunt, so as to increase the extrusion force to both sides when the downward probe 2 penetrates. The downward probe 2 can penetrate separately at different depths of the backfill soil 24. The downward probe 2 can penetrate separately, which can make the friction area received by the downward probe 2 constant regardless of the depth of the backfill soil detected. Ensure the accuracy during the compactness detection. The cross-sections of the downward probe 2 and the hollow outer sleeve 1 are both rectangular, and the inner and outer edges of the downward probe 2 and the hollow outer sleeve 1 are aligned up and down.

[0050] The portable detection component further includes a downward probe stop detection mechanism. The downward probe stop detection mechanism includes a connection box 9 fixedly connected to the right side of the top end of the hollow outer sleeve 1, a connection shaft 19 rotatably connected to the inner side of the connection box 9, an induction member 10 fixedly connected to the rear end of the connection box 9, and a side plate 8 fixedly connected to the right side of the top plate 4. After the downward probe 2 reaches the set depth, the driving box 6 provides a gradually decreasing downward pressure. When the downward pressure is not enough to support the downward probe 2 to continue to penetrate, it will be detected by the downward probe stop detection mechanism, and the downward pressure of the driving box 6 at this time is recorded, and it is compared with the downward pressure at which the downward probe 2 cannot penetrate under the standard compactness of the backfill soil 24 to realize the comparison detection of the compactness.

[0051] The greater the compactness of the backfill soil 24, the greater the force required for the downward probe 2 to penetrate.

[0052] Preferably, as the portable detection component for compactness of backfill soil based on the present invention, the induction member 10 is an angular velocity sensor. The input end of the angular velocity sensor is fixedly connected to one end of the connection shaft 19. The downward probe stop detection mechanism further includes a wire reel 18 fixedly connected to the outside of the connection shaft 19. A connection rope 17 is fixedly connected and wound around the outside of the wire reel 18. The other end of the connection rope 17 passes through the inside of the connection box 9 and is fixedly connected to the bottom end of the side plate 8.

[0053] Preferably, as a portable detection component for the compactness of backfill soil based on high-frequency vibration of the present invention, a connecting ring 22 is fixedly connected to the inner side of the connecting box 9. A clockwork spring 23 is arranged inside the connecting ring 22. Both ends of the clockwork spring 23 are fixedly connected to the inner side of the connecting ring 22 and the outer side of the connecting shaft 19 respectively. At the initial stage of detection, the top plate 4 is separated from the top end of the hollow outer sleeve 1, and the clockwork spring 23 is in a state of storing energy. When the downward probe 2 descends, the clockwork spring 23 drives the connecting shaft 19 to reset clockwise. The clockwise rotation of the connecting shaft 19 can be sensed by the angular velocity sensor and recorded as the positive angular velocity. Angular velocity is a vector. When the positive angular velocity remains 0 within half a minute, it indicates that the downward pressure is not sufficient to support the continued descent of the downward probe 2. Among them, because the drive box 6 will generate vibrations during operation, the vibrations may cause the short-term floating of the downward probe 2. When floating, the connecting shaft 19 rotates counterclockwise, and the angular velocity sensor generates a negative angular velocity. The controller 7 does not record the generated negative angular velocity.

[0054] Preferably, as a portable detection component for the compactness of backfill soil based on high-frequency vibration of the present invention, pressing plates 3 are fixedly connected to the outer sides of the front and rear ends of the hollow outer sleeve 1. The hollow outer sleeve 1 is operated through the pressing plates 3. A controller 7 is fixedly connected to the top end of the drive box 6. A drive motor 12 is fixedly connected to the inner side of the top end of the drive box 6. The drive motor 12 is a constant-speed motor. The end of the main shaft of the drive motor 12 is fixedly connected to a first bevel gear 13. Support rings 14 are fixedly connected to the inner sides of the left and right ends of the drive box 6 respectively. A second bevel gear 21 is rotatably connected to the inner side of the top end of each support ring 14 through a rotating shaft. The two second bevel gears 21 on the left and right are meshed with the left and right sides of the first bevel gear 13 respectively, so that the rotation directions of the two second bevel gears 21 on the left and right are opposite.

[0055] Preferably, as a portable detection component for the compactness of backfill soil based on high-frequency vibration of the present invention, each second bevel gear 21 is coaxially fixedly connected with an eccentric wheel 20. The eccentric directions of the two eccentric wheels 20 are opposite. The eccentric direction of the eccentric wheel 20 is perpendicular to the long side of the hollow outer sleeve 1. By increasing the long side area, the vibration in the eccentric direction is reduced. When the eccentric wheel 20 rotates, it causes the drive box 6 to generate a downward pressure. When the rectangular hollow outer sleeve 1 descends, it can effectively play a limiting role and increase the verticality during descent; the eccentric directions of the two eccentric wheels 20 are opposite, and the rotation directions of the two eccentric wheels 20 are also opposite. This setting is used to reduce the vibration in the eccentric direction and increase the vibration in the up and down directions, and increase the downward pressure.

[0056] As a preferred portable detection component for backfill compaction degree based on high-frequency vibration of the present invention, a slide groove 202 is opened on the inner side of the eccentric wheel 20, and a slider 205 is slidably connected to the inner side of the slide groove 202. The downward pressure of the drive box 6 is changed by changing the position of the slider 205 in the slide groove 202. A second motor 201 is fixedly connected to the slider 205, and a screw 203 is fixedly connected to the end of the main shaft of the second motor 201. The outer side of the screw 203 is spirally connected to the inner side of the slider 205, and the position adjustment of the slider 205 is achieved by rotating the second motor 201.

[0057] As a preferred portable detection component for backfill compaction based on high-frequency vibration of the present invention, a potentiometer 204 is fixedly connected to the inner side of the edge of the slide groove 202, and a synchronization block 206 is fixedly connected to the center position of the edge of the slider 205. The synchronization block 206 slides on the potentiometer 204, and the specific position of the slider 205 is obtained through the potentiometer 204.

[0058] Example 2: This example is an alternative to Example 1. Figures 1-4 , Figures 6-8 and Figures 11-14 The sensing member 10 is a turn counter, the input end of the turn counter is fixedly connected to one end of the connecting shaft 19, and there is a certain damping force between the connecting shaft 19 and the connecting box 9. The lower probe stop detection mechanism also includes a winding wheel 18 rotatably connected to the outer side of the connecting shaft 19, and a friction plate 26 is fixedly connected to the bottom end of the side plate 8. The friction plate 26 extends downward into the inner side of the connecting box 9 and fits with the outer side of the winding wheel 18. The up and down movement of the lower probe 2 can drive the winding wheel 18 to rotate reciprocatingly through the friction plate 26.

[0059] As a portable backfill compaction detection component based on high-frequency vibration of the present invention, preferably, a ratchet 25 is fixedly connected to the outer side of the connecting shaft 19, and the corresponding sensitivity of the ratchet 25 and the pawl 15 can be increased by increasing the density of the ratchet 25. The inner side of the winding wheel 18 is rotatably connected to the pawl 15 through a hinge, and a torsion spring 16 is fixedly connected between the pawl 15 and the inner side of the winding wheel 18. When the lower probe 2 moves downward, the pawl 15 is stuck on the ratchet 25 and drives the connecting shaft 19 to rotate. At this time, the turn counter counts, and when the lower probe 2 moves upward, the pawl 15 will slide over the ratchet 25. The ratchet 25 and the pawl 15 are used to filter out the upward jitter that occurs when the drive box 6 drives the lower probe 2 to work. When the reading of the turn counter no longer increases within half a minute, it indicates that the downward pressure is insufficient to support the lower probe 2 to continue to move downward.

[0060] Under the above settings, the downward movement of the probe 2 drives the friction plate 26 to move downward. The friction plate 26 drives the wire reel 18 to rotate clockwise. The pawl 15 catches on the ratchet 25 and drives the connecting shaft 19 to rotate. At this time, the revolution counter counts. When the reading of the revolution counter no longer increases within half a minute, it indicates that the downward pressure is not sufficient to support the continued downward movement of the probe 2.

[0061] The present invention also discloses a method for detecting the compactness of backfill soil based on high-frequency vibration, and its steps are as follows: Step 1: By operating the pressing plate 3, the detection assembly is inserted into the backfill soil 24 to the depth to be detected, that is, the probe 2 reaches the detection depth. At this time, during the insertion process, the top end of the probe 2 will be in interference contact with the bottom end of the hollow outer sleeve 1.

[0062] Step 2: In the initial position, the slider 205 is at the end position away from the axis in the chute 202. The drive box 6 starts to work. The drive box 6 generates a downward pressure to make the probe 2 move downward. During this process, the position of the slider 205 is continuously changed by the second motor 201, so that the position of the slider 205 gradually approaches the axis. The drive box 6 provides a gradually decreasing downward pressure until the downward pressure is not sufficient to support the continued downward movement of the probe 2 and it is detected by the probe stop detection mechanism.

[0063] Step 3: Through the potentiometer 204, obtain and record the position of the slider 205 in the chute 202 when the probe stop detection mechanism detects that the probe 2 stops in Step 2.

[0064] Step 4: Place the detection assembly under the standard compactness of the backfill soil 24 for detection, and repeat Steps 2 to 3 above to obtain and record the position of the slider 205 in the chute 202 when the detection assembly is detected under the standard compactness of the backfill soil 24.

[0065] Step 5: Define the distance between the slider 205 and the axis in Step 3 as S2, and define the distance between the slider 205 and the axis in Step 4 as S1. When S2 is greater than S1, it indicates that the compactness of the detected backfill soil 24 is greater than the standard compactness of the backfill soil 24. When S2 is less than S1, it indicates that the compactness of the detected backfill soil 24 is less than the standard compactness of the backfill soil 24.

[0066] In actual operation, Steps 4 and the detection of S1 can be completed first, and then the detection of different depth detection points can be carried out again. The present invention is powered by an external power supply.

[0067] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable backfill soil compaction detection component based on high-frequency vibration, characterized in that: It comprises a hollow outer stop (1) with an air vent (11) on the top and a lower probe stop detection mechanism, wherein the inner side of the hollow outer stop (1) is slidably connected to a plurality of uniformly arranged slide bars (5), the bottom and top ends of the slide bars (5) are respectively fixedly connected to the lower probe (2) and the top plate (4), the top end of the top plate (4) is fixedly connected to a drive box (6), and the drive box (6) is used to provide downward pressure for the lower probe (2); The bottom end of the lower exploration member (2) is in the shape of a "knife blade", and the lower exploration member (2) can be independently lowered to different depths in the backfill soil (24). The cross-sections of the lower exploration member (2) and the hollow outer member (1) are both rectangular, and the inner edges and outer edges of the lower exploration member (2) and the hollow outer member (1) are aligned vertically. The lower probe member stop detection mechanism comprises a connection box (9) fixedly connected to the right side of the top end of the hollow outer gear (1), a connection shaft (19) rotatably connected to the inner side of the connection box (9), a sensing member (10) fixedly connected to the rear end of the connection box (9), and a side plate (8) fixedly connected to the right side of the top plate (4). After the lower probe member (2) reaches the set depth, the driving box (6) provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the lower probe member (2) to continue to probe downward, which is detected by the lower probe member stop detection mechanism. The downward pressure of the driving box (6) at this time is recorded and compared with the downward pressure of the lower probe member (2) that cannot be probed downward under the standard compaction degree of the backfill soil (24), so as to realize the comparison detection of the compaction degree.

2. The portable backfill soil compaction detection component based on high-frequency vibration according to claim 1, characterized in that: The sensing member (10) is an angular velocity sensor, the input end of which is fixedly connected to one end of the connecting shaft (19), and the lower probe stop detection mechanism further comprises a winding wheel (18) fixedly connected to the outside of the connecting shaft (19), a connecting rope (17) being fixedly wound around the outside of the winding wheel (18), and the other end of the connecting rope (17) passing through the inside of the connecting box (9) and then fixedly connected to the bottom end of the side plate (8).

3. The portable detection component for backfill soil compaction based on high-frequency vibration according to claim 2, characterized in that: A connecting ring (22) is fixedly connected to the inner side of the connecting box (9), a spring (23) is arranged on the inner side of the connecting ring (22), and two ends of the spring (23) are respectively fixedly connected to the inner side of the connecting ring (22) and the outer side of the connecting shaft (19). When the lower probe (2) moves downward, the spring (23) drives the connecting shaft (19) to reset clockwise. The clockwise rotation of the connecting shaft (19) can be sensed by the angular velocity sensor and recorded as a positive angular velocity. When the positive angular velocity remains zero for half a minute, it indicates that the downward pressure is insufficient to support the lower probe (2) to continue to move downward.

4. The portable detection assembly for backfill soil compaction based on high-frequency vibration according to claim 1, characterized in that: The sensing member (10) is a turn counter, the input end of which is fixedly connected to one end of the connecting shaft (19). The lower probe member stop detection mechanism also includes a winding wheel (18) rotatably connected to the outer side of the connecting shaft (19). The bottom end of the side plate (8) is fixedly connected to a friction plate (26). The friction plate (26) extends downward into the inner side of the connecting box (9) and fits with the outer side of the winding wheel (18). The up and down movement of the lower probe member (2) can drive the winding wheel (18) to rotate back and forth through the friction plate (26).

5. The portable detection assembly for backfill soil compaction based on high-frequency vibration according to claim 4, characterized in that: The outer side of the connecting shaft (19) is fixedly connected with a ratchet (25), and the inner side of the winding wheel (18) is rotatably connected with a pawl (15) through a hinge. A torsion spring (16) is fixedly connected between the pawl (15) and the inner side of the winding wheel (18). When the lower probe (2) moves downward, the pawl (15) is stuck on the ratchet (25) and drives the connecting shaft (19) to rotate. At this time, the revolution counter counts. When the lower probe (2) moves upward, the pawl (15) slides over the ratchet (25). The ratchet (25) and the pawl (15) are used to filter out the upward jitter that occurs when the driving box (6) drives the lower probe (2) to work. When the reading of the revolution counter no longer increases within half a minute, it indicates that the downward pressure is insufficient to support the lower probe (2) to continue to move downward.

6. The portable detection component for backfill soil compaction based on high-frequency vibration according to claim 3 or 5, characterized in that: The outer sides of the front and rear ends of the hollow outer gear (1) are fixedly connected with a pressure plate (3), and the hollow outer gear (1) is operated by the pressure plate (3). The top end of the drive box (6) is fixedly connected with a controller (7), and the inner side of the top end of the drive box (6) is fixedly connected with a drive motor (12), the drive motor (12) is a constant speed motor, and the end of the main shaft of the drive motor (12) is fixedly connected with a first bevel gear (13). The inner sides of the left and right ends of the drive box (6) are fixedly connected with support rings (14), and the inner side of the top end of each support ring (14) is rotatably connected with a second bevel gear (21) through a rotating shaft. The left and right second bevel gears (21) are respectively meshed with the left and right sides of the first bevel gear (13), so that the left and right second bevel gears (21) rotate in opposite directions.

7. The portable backfill soil compaction detection component based on high-frequency vibration according to claim 6, characterized in that: Each second bevel gear (21) is coaxially fixedly connected to an eccentric wheel (20). The two eccentric wheels (20) have opposite eccentric directions. The eccentric directions of the eccentric wheels (20) are perpendicular to the long sides of the hollow outer gear (1). When the eccentric wheels (20) rotate, the driving box (6) generates downward pressure.

8. The portable detection assembly for backfill soil compaction based on high-frequency vibration according to claim 7, characterized in that: A slide groove (202) is provided on the inner side of the eccentric wheel (20), and a slider (205) is slidably connected to the inner side of the slide groove (202). The downward force of the drive box (6) is changed by changing the position of the slider (205) in the slide groove (202). A second motor (201) is fixedly connected to the slider (205). A screw rod (203) is fixedly connected to the end of the main shaft of the second motor (201). The outer side of the screw rod (203) is spirally connected to the inner side of the slider (205). The position of the slider (205) is adjusted by the rotation of the second motor (201).

9. The portable backfill soil compaction detection component based on high-frequency vibration according to claim 8, characterized in that: A potentiometer (204) is fixedly connected to the inner side of the edge of the slide groove (202), and a synchronization block (206) is fixedly connected to the center position of the edge of the slider (205). The synchronization block (206) slides on the potentiometer (204) to obtain the specific position of the slider (205) through the potentiometer (204).

10. A backfill soil compaction detection method based on high-frequency vibration, characterized in that: Using the portable backfill soil compaction detection assembly as claimed in claim 9, the steps are: Step 1: insert the detection assembly into the depth of the backfill soil (24) to be detected by operating the pressing plate (3). Even if the lower probe (2) reaches the detection depth, during the insertion process, the top end of the lower probe (2) will come into interference contact with the bottom end of the hollow outer stop (1); Step 2: In the initial position, the slider (205) is at the end position in the slide groove (202) away from the axis, and the drive box (6) starts to work. The drive box (6) generates a downward force to make the lower probe (2) move downward. During this process, the position of the slider (205) is continuously changed by the second motor (201), so that the position of the slider (205) gradually approaches the axis, and the drive box (6) provides a gradually decreasing downward force until the downward force is insufficient to support the lower probe (2) to continue to move downward, and it is detected by the lower probe stop detection mechanism; Step 3: obtaining and recording, by means of a potentiometer (204), the position of the slider (205) in the slide groove (202) when the lower probe member stop detection mechanism detects that the lower probe member (2) stops in step 2; Step 4: placing the detection component under the backfill soil (24) at the standard compaction degree for detection, repeating the above steps 2 to 3, obtaining and recording the position of the slider (205) in the chute (202) when the detection component is detected under the backfill soil (24) at the standard compaction degree; Step 5: The distance between the slider (205) and the axis in step 3 is set as S2, and the distance between the slider (205) and the axis in step 4 is set as S1. When S2 is greater than S1, it means that the compaction degree of the backfill soil (24) detected is greater than the standard compaction degree of the backfill soil (24). When S2 is less than S1, it means that the compaction degree of the backfill soil (24) detected is less than the standard compaction degree of the backfill soil (24).

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