Geotechnical investigation device for building goaf

Abstract

The invention relates to the field of engineering investigation. The invention discloses a geotechnical investigation device for a building goaf, which comprises an outer exploring tube, the side surface of the outer exploring tube is provided with three vertical grooves which are annularly arranged at equal intervals, and the left and right sides of each vertical groove are provided with first arc-shaped grooves. The problem to be solved by the invention is that the distance between multiple groups of sampling barrels cannot be regulated and controlled according to requirements. The device is composed of a rock soil sampling mechanism, an auxiliary collecting mechanism, an adjusting mechanism and a driving mechanism. According to the geotechnical investigation device for the building goaf, a movable clamping gear is rotated to drive an inner spiral sleeve to rotate, then a sliding gear and a middle limiting sliding sleeve on the sliding gear are pulled to move upwards, a sliding toothed plate is driven to move upwards at the same time when the sliding gear moves upwards, and then a limiting sliding sleeve on the upper side is driven to move upwards by two times of distance relative to the middle limiting sliding sleeve; and it is guaranteed that the distances among the three limiting sliding sleeves are equal, and the three sets of storage frames are adjusted at equal intervals.

Description

Technical Field

[0001] The invention relates to the field of engineering investigation, in particular to a rock and soil investigation device for building goaf areas. Background Art

[0002] Goafs are "holes" created beneath the surface by human excavation or natural geological movements. The existence of goafs poses a great safety problem to the safe production of mines. Personnel and mechanical equipment may fall into the goaf and be injured. Since underground goafs are highly hidden, have poor regularity in spatial distribution characteristics, and are difficult to predict the collapse of the goaf roof, the problem of how to sample and survey the rock and soil in underground goafs needs to be solved.

[0003] The existing patent (Announcement No.: CN118190500A) discloses a geotechnical sampling device for geotechnical engineering investigation. Through the sampling assembly, multiple sets of sampling tubes can be set to obtain multiple geotechnical samples from different depths in the same operation, thereby obtaining more comprehensive and representative underground geotechnical information, which can reduce the number of repeated drillings. In the process of realizing the present invention, the inventor found that at least the following problems in the prior art have not been solved: although the device can sample geotechnical samples at different depths, the distance between the multiple sets of sampling tubes is fixed, and the device cannot adjust the distance between the multiple sets of sampling tubes according to demand, and the universality is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a geotechnical survey device for building goaf areas, so as to solve the problem in the above background technology that the distance between multiple groups of sampling tubes cannot be adjusted according to demand. In order to achieve the above purpose, the present invention provides the following technical solutions: a geotechnical survey device for building goaf areas, comprising an outer probe tube, the side of the outer probe tube is provided with three vertical grooves arranged in a ring shape with equal distances, the left and right sides of the vertical groove are both provided with a first arc groove, the side of the first arc groove away from the central axis of the outer probe tube is provided with a second arc groove, and the first arc groove and the second arc groove form an L-shaped groove; A rock and soil sampling mechanism is provided in the vertical limited sliding inside the vertical slot, and an inner rotating tube is provided on the rock and soil sampling mechanism, and the inner rotating tube is rotatably connected to the center of the bottom of the inner wall of the outer probe tube, and the rock and soil sampling mechanism is driven by rotating the inner rotating tube to sample the rock and soil; The rock and soil sampling mechanism comprises an arc-shaped plate sliding in two second arc-shaped grooves, a storage frame is inserted in the arc-shaped plate, and a return spring telescopic rod is fixedly connected to both upper and lower sides of the storage frame, and the end of the return spring telescopic rod away from the storage frame is fixed on the side of the arc-shaped plate facing the inner rotating tube; Four first spring telescopic rods are fixedly inserted on one side of the storage frame facing the central axis of the outer probe tube, and the four first spring telescopic rods are distributed on the storage frame in a rectangular shape, a pressure plate is fixedly connected to one end of the first spring telescopic rod away from the storage frame, a hinged rod is hinged to one side of the pressure plate facing away from the storage frame, a limiting sleeve is fixedly connected to one end of the hinged rod away from the pressure plate, and the limiting sleeve is vertically limited and slidably arranged on the outer wall of the inner rotating tube; The inner rotating tube is provided with four vertical grooves, and a fixing block is slidably connected in the vertical groove, and the fixing block is fixed on the inner wall of the limiting sliding sleeve.

[0005] Preferably, the rock and soil sampling mechanism is further provided with an auxiliary collection mechanism, the auxiliary collection mechanism comprises four rotating rods which are transversely passed through the storage frame, the four rotating rods are arranged in a diamond shape, the front ends of the rotating rods are fixedly connected with deflection plates, and the deflection plates are embedded in placement grooves provided on the inner wall of the storage frame; A spiral groove is provided on the rear end of the rotating rod, a limiting slider is abutted in the spiral groove, the limiting slider is fixed on the side of the pressing plate facing the storage frame, and the pressing plate is slidably arranged on the four rotating rods.

[0006] Preferably, the auxiliary collection mechanism further comprises two card plates rotatably connected to the left and right sides of the pressing plate, the side of the card plate facing away from the pressing plate is an inclined surface, and a second spring telescopic rod is hinged between the upper side of the card plate and the side surface of the pressing plate; A wedge block used in conjunction with the clamp is provided on the side of the clamp facing the inner wall of the outer probe tube, a wedge plate is fixedly connected to the wedge block, a third spring telescopic rod is fixedly connected to the side of the wedge plate facing the inner wall of the outer probe tube, and the lower end of the third spring telescopic rod is fixed to the outer wall of the storage frame; The chamfered surface of the wedge-shaped plate is butted against an L-shaped rod, and an inverted V-shaped push frame is fixed to one end of the L-shaped rod away from the wedge-shaped plate. The inverted V-shaped push frame is fixed on the side of the arc-shaped plate facing the inner rotating tube, and two inverted V-shaped push frames are on both sides of the upper and lower storage frame; The left and right sides and the upper and lower sides of the inverted V-shaped push frame are provided with sealing plates, the sealing plates are slidably arranged inside the second arc groove, and one end of the sealing plate is fixedly connected to a return spring, and the end of the return spring away from the sealing plate is fixed to the inner wall of the second arc groove.

[0007] Preferably, both upper and lower sides of the sealing plate are provided with inclined surfaces, and the inclined surfaces on the sealing plate are squeezed by an inverted V-shaped push frame, so that the sealing plate slides in the second arc groove and squeezes the reset spring to be compressed.

[0008] Preferably, an adjustment mechanism is provided inside the inner rotating tube, and the adjustment mechanism comprises a fixed tooth plate fixed on the inner wall of the inner rotating tube, and the fixed tooth plate is fixedly connected to the lowermost fixed block; The fixed tooth plate is meshed with a sliding gear, and the rotating shaft of the sliding gear passes through the vertical groove and rotates on the inner wall of the middle limit sliding sleeve. The two ends of the rotating shaft of the sliding gear are rotatably connected with a fixed frame, the side of the fixed frame is provided with a thread, and the external thread of the fixed frame is connected with an inner spiral sleeve, the inner spiral sleeve is rotatably connected to the inner wall of the inner rotating tube, and the upper end of the inner spiral sleeve extends to the upper side of the upper end of the inner rotating tube; The sliding gear is meshed with a sliding tooth plate, the sliding tooth plate is fixed on the upper fixed block, and the sliding tooth plate is slidably connected to the inner wall of the inner rotating tube.

[0009] Preferably, the upper end of the inner rotating tube is fixedly connected with a driving mechanism, and the driving mechanism comprises a hollow sleeve fixed to the top end of the inner rotating tube, and the upper end of the inner wall of the hollow sleeve is fixedly connected with a fixed card gear, and the bottom surface of the fixed card gear abuts against a movable card gear, and the movable card gear is slidably arranged on the inner wall of the hollow sleeve; The lower end of the movable card gear is fixedly connected with a compression spring, and the lower end of the compression spring is fixed on the top of the inner spiral tube. The movable card gear is vertically limited and slidably sleeved on the outer wall of the inner spiral sleeve. The upper end of the movable card gear is fixedly connected with a handle.

[0010] Preferably, both ends of the inverted V-shaped push frame are fixedly connected with protrusions, and the inverted V-shaped push frame is fixed on the arc plate through the protrusions.

[0011] Preferably, the bottom surface of the outer probe tube is a cone, and a fan-shaped block is fixedly connected to the upper end of the outer side of the outer probe tube.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the inner spiral sleeve is driven to rotate by rotating the movable locking gear, thereby pulling the sliding gear and the middle limiting sleeve on the sliding gear upward, and when the sliding gear moves upward, the sliding tooth plate is driven to move upward at the same time, thereby driving the upper limiting sleeve to move up twice the distance of the middle limiting sleeve, ensuring that the distances between the three limiting sleeves are equal, and adjusting the three groups of storage frames to equal spacing.

[0013] In the present invention, the inclined surface set on the sealing plate is squeezed by moving the inverted V-shaped push frame upward, thereby pushing the two sealing plates to slide into the two first arc-shaped grooves respectively and squeezing the reset spring to compress, so that the storage frame on the arc plate can stably slide between the two sealing plates on its upper side, and then the two sealing plates on the lower side of the storage frame are reset under the action of the reset spring reset force, thereby preventing the rock and soil from entering the interior of the outer probe tube through the vertical groove when sampling the rock and soil later.

[0014] In the present invention, when the storage frame moves outward from the inside of the outer probe tube, the reset spring telescopic rod is compressed, and when the reset spring telescopic rod is compressed to its maximum value, the hinged rod continues to drive the pressure plate to move and squeeze the first spring telescopic rod to be compressed, and the limiting slider on the pressure plate slides in the spiral groove, thereby driving the rotating rod to deflect and move out of the placement groove, thereby isolating the soil in the storage frame from the soil outside it, thereby ensuring the soil taking quality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a cross-sectional view of the three-dimensional structure of the present invention; Figure 3 is a cross-sectional view of the top of the outer probe tube of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the auxiliary collection mechanism of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of a wedge block and a wedge plate of the present invention; Figure 6 It is a three-dimensional structural cross-sectional view of the storage frame of the present invention; Figure 7 The three-dimensional structural section of the inner spiral tube of the present invention is Figure 1 ; Figure 8 The three-dimensional structure of the inner spiral tube of the present invention is shown in FIG. Figure 2 ; Fig. 9 It is a cross-sectional view of the three-dimensional structure of the inner rotating tube and the hollow sleeve of the present invention.

[0016] In the figure: 1, outer probe tube; 2, vertical slot; 3, first arc slot; 4, second arc slot; 5, rock and soil sampling mechanism; 51, arc plate; 52, storage frame; 53, first spring telescopic rod; 54, pressure plate; 55, hinged rod; 56, limit sliding sleeve; 57, vertical slot; 58, fixed block; 59, reset spring telescopic rod; 6, inner rotating tube; 7, auxiliary collection mechanism; 71, rotating rod; 72, deflection plate; 73, placement slot; 74, spiral slot; 75, limit slider; 76, wedge block; 7 7. Wedge plate; 78. Third spring telescopic rod; 79. L-shaped rod; 710. Inverted V-shaped push frame; 711. Sealing plate; 712. Return spring; 713. Inclined surface; 714. Card plate; 715. Second spring telescopic rod; 8. Adjustment mechanism; 81. Fixed tooth plate; 82. Sliding gear; 83. Fixed frame; 84. Inner spiral sleeve; 85. Sliding tooth plate; 9. Driving mechanism; 91. Hollow sleeve; 92. Fixed card gear; 93. Movable card gear; 94. Compression spring; 95. Handle. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 9 The present invention provides a technical solution: a geotechnical exploration device for building goaf areas, comprising an outer probe tube 1, wherein three vertical grooves 2 arranged in a ring at equal distances are opened on the side of the outer probe tube 1, first arc grooves 3 are opened on both sides of the left and right sides of the vertical grooves 2, a second arc groove 4 is opened on the side of the first arc groove 3 away from the central axis of the outer probe tube 1, and the first arc groove 3 and the second arc groove 4 form an L-shaped groove; a scale is set on the top surface of the outer probe tube 1 to facilitate the user to understand the rotation angle of the handle 95.

[0019] A rock and soil sampling mechanism 5 is provided in the vertical limited sliding inside the vertical slot 2, and an inner rotating tube 6 is provided on the rock and soil sampling mechanism 5, and the inner rotating tube 6 is rotatably connected to the center of the bottom of the inner wall of the outer probe tube 1, and the rock and soil sampling mechanism 5 is driven by rotating the inner rotating tube 6 to sample the rock and soil; The soil sampling mechanism 5 includes an arc-shaped plate 51 sliding in the two second arc-shaped grooves 4, a storage frame 52 is inserted into the arc-shaped plate 51, and a return spring telescopic rod 59 is fixedly connected to both upper and lower sides of the storage frame 52, and the end of the return spring telescopic rod 59 away from the storage frame 52 is fixed to the side of the arc-shaped plate 51 facing the inner rotating tube 6; Four first spring telescopic rods 53 are fixedly inserted on one side of the storage frame 52 facing the central axis of the outer probe tube 1, and the four first spring telescopic rods 53 are distributed in a rectangular shape on the storage frame 52. A pressure plate 54 is fixedly connected to one end of the first spring telescopic rod 53 away from the storage frame 52. A hinged rod 55 is hinged to one side of the pressure plate 54 facing away from the storage frame 52. A limit sleeve 56 is fixedly connected to one end of the hinged rod 55 away from the pressure plate 54. The limit sleeve 56 is vertically limited and slidably arranged on the outer wall of the inner rotating tube 6. Four vertical grooves 57 are formed on the inner rotating tube 6 , and a fixing block 58 is slidably connected in the vertical groove 57 . The fixing block 58 is fixed on the inner wall of the limiting sliding sleeve 56 .

[0020] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the rock and soil sampling mechanism 5 is also provided with an auxiliary collection mechanism 7, which includes four rotating rods 71 ​​that penetrate the storage frame 52 transversely, and the four rotating rods 71 ​​are arranged in a diamond shape. The front end of the rotating rod 71 is fixedly connected with a deflection piece 72, and the deflection piece 72 is embedded in a placement groove 73 provided on the inner wall of the storage frame 52; A spiral groove 74 is formed on the rear end of the rotating rod 71 . A limit slider 75 abuts against the spiral groove 74 . The limit slider 75 is fixed on the side of the pressing plate 54 facing the storage frame 52 . The pressing plate 54 is slidably disposed on the four rotating rods 71 ​​.

[0021] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the auxiliary collection mechanism 7 also includes two clamping plates 714 rotatably connected to the left and right sides of the pressing plate 54, the side of the clamping plate 714 facing away from the pressing plate 54 is an inclined surface, and a second spring telescopic rod 715 is hinged between the upper side of the clamping plate 714 and the side of the pressing plate 54; A wedge block 76 is provided on the side of the clamping plate 714 facing the inner wall of the outer probe tube 1, and a wedge plate 77 is fixedly connected to the wedge block 76. A third spring telescopic rod 78 is fixedly connected to the side of the wedge plate 77 facing the inner wall of the outer probe tube 1, and the lower end of the third spring telescopic rod 78 is fixed to the outer wall of the storage frame 52; The chamfered surface of the wedge-shaped plate 77 is butted against an L-shaped rod 79, and an inverted V-shaped push frame 710 is fixed to one end of the L-shaped rod 79 away from the wedge-shaped plate 77. The inverted V-shaped push frame 710 is fixed to the side of the arc-shaped plate 51 facing the inner rotating tube 6, and two inverted V-shaped push frames 710 are on both sides of the upper and lower storage frame 52; There are sealing plates 711 on both sides of the left and right sides and the upper and lower sides of the inverted V-shaped push rack 710. The sealing plate 711 is slidably set inside the second arc groove 4, and one end of the sealing plate 711 is fixedly connected to a return spring 712. The end of the return spring 712 away from the sealing plate 711 is fixed on the inner wall of the second arc groove 4, and the height of the sealing plate 711 is one-fourth of the height of the arc plate 51, ensuring that the arc plate 51 can stably seal the sealing plate 711 in the open state to prevent soil from entering the outer probe 1 during sampling.

[0022] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, both sides of the sealing plate 711 are provided with inclined surfaces 713, and the inclined surface 713 on the sealing plate 711 is squeezed by the inverted V-shaped push frame 710, so that the sealing plate 711 slides in the second arc groove 4 and squeezes the return spring 712 to be compressed.

[0023] In this embodiment, Figure 2 , Figure 7 , Figure 8 and Fig. 9 As shown, an adjustment mechanism 8 is provided inside the inner rotating tube 6, and the adjustment mechanism 8 includes a fixed tooth plate 81 fixed on the inner wall of the inner rotating tube 6, and the fixed tooth plate 81 is fixedly connected to the lowermost fixed block 58; A sliding gear 82 is meshed on the fixed tooth plate 81, and the rotating shaft of the sliding gear 82 passes through the vertical groove 57 and rotates on the inner wall of the middle limit sliding sleeve 56. The two ends of the rotating shaft of the sliding gear 82 are rotatably connected with a fixed frame 83. The side of the fixed frame 83 is provided with a thread, and the external thread of the fixed frame 83 is connected with an inner spiral sleeve 84. The inner spiral sleeve 84 is rotatably connected to the inner wall of the inner rotating tube 6, and the upper end of the inner spiral sleeve 84 extends to the upper side of the upper end of the inner rotating tube 6. A sliding tooth plate 85 is meshed on the sliding gear 82 . The sliding tooth plate 85 is fixed on the upper fixing block 58 , and the sliding tooth plate 85 is slidably connected to the inner wall of the inner rotating tube 6 .

[0024] In this embodiment, Figure 2 , Figure 7 , Fig. 9 As shown, the upper end of the inner rotating tube 6 is fixedly connected with a driving mechanism 9, and the driving mechanism 9 includes a hollow sleeve 91 fixed to the top of the inner rotating tube 6, and the upper end of the inner wall of the hollow sleeve 91 is fixedly connected with a fixed card gear 92, and the bottom surface of the fixed card gear 92 abuts against a movable card gear 93, and the movable card gear 93 is slidably arranged on the inner wall of the hollow sleeve 91; The lower end of the movable locking gear 93 is fixedly connected to a compression spring 94, and the lower end of the compression spring 94 is fixed to the top of the inner rotating tube 6. The movable locking gear 93 is vertically limited and slidably sleeved on the outer wall of the inner spiral sleeve 84, and the upper end of the movable locking gear 93 is fixedly connected to a handle 95.

[0025] In this embodiment, Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, both ends of the inverted V-shaped push frame 710 are fixedly connected with protrusions, and the inverted V-shaped push frame 710 is fixed on the arc plate 51 through the protrusions.

[0026] In this embodiment, Figure 1 , Figure 2 As shown, the bottom surface of the outer probe tube 1 is a cone, and a fan-shaped block is fixedly connected to the upper end of the outer side of the outer probe tube 1.

[0027] The use method and advantages of the present invention: The use method of the building goaf geotechnical exploration device, the working process is as follows: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown: when the device is used to survey the rock and soil of the building goaf area, it is necessary to sample the rock and soil of the goaf area. First, a deep hole is drilled in the rock and soil of the area by a drilling machine, and then the handle 95 is pressed to drive the movable card gear 93 to slide up and down on the outer wall of the inner spiral sleeve 84, so that the movable card gear 93 is separated from the fixed card gear 92, and then the movable card gear 93 is rotated to drive the inner spiral sleeve 84 to rotate, so that the fixed frame 83 moves up inside the inner spiral sleeve 84, thereby pulling the sliding gear 82 and the sliding gear The middle limiting sleeve 56 on 82 moves up, and when the sliding gear 82 moves up, the sliding tooth plate 85 is driven to move up at the same time, thereby driving the upper limiting sleeve 56 to move up twice the distance relative to the middle limiting sleeve 56, ensuring that the distances between the three limiting sleeves 56 are equal, and the three groups of storage frames 52 are adjusted to have equal spacing, and then stop applying downward pressure to the handle 95, and drive the movable locking gear 93 to move up and engage with the fixed locking gear 92 through the compression spring 94, so as to lock the three groups of storage frames 52 after adjustment; When the limiting sliding sleeve 56 moves upward on the outer wall of the inner rotating tube 6, the arc plate 51 and the storage frame 52 at the end of the hinged rod 55 are driven to move upward at the same time, so that the arc plate 51 slides upward in the second arc groove 4 and drives the inverted V-shaped push frame 710 thereon to move upward, and the inverted V-shaped push frame 710 moves upward to squeeze the inclined surface 713 set on the sealing plate 711, thereby pushing the two sealing plates 711 to slide into the two first arc grooves 3 respectively and squeeze the reset spring 712 to compress, so that the storage frame 52 on the arc plate 51 slides stably between the two sealing plates 711 on its upper side, and then the two sealing plates 711 on the lower side of the storage frame 52 are reset under the action of the reset spring 712 reset force, so as to prevent the rock and soil from entering the inner part of the outer probe tube 1 through the vertical groove 2 when sampling the rock and soil in the future; Then the user puts the outer probe tube 1 into the sampling hole of the rock and soil, and then turns the handle 95 to cooperate with the fixed card gear 92 to drive the inner rotating tube 6 to rotate clockwise, so that the limiting sliding sleeve 56 drives the hinge rod 55 to deflect, and then drives the pressing plate 54 and the storage frame 52 to slide on the arc plate 51 to the side away from the limiting sliding sleeve 56, so that the storage frame 52 is inserted into the inner wall of the sampling hole to sample the rock and soil in the sampling hole; When the storage frame 52 moves outward from the inside of the outer probe tube 1, the reset spring telescopic rod 59 is compressed, and when the reset spring telescopic rod 59 is compressed to its maximum value, the hinged rod 55 continues to drive the pressing plate 54 to move and squeeze the first spring telescopic rod 53 to compress, and the limiting slider 75 on the pressing plate 54 slides in the spiral groove 74, thereby driving the rotating rod 71 to deflect and move out of the placement groove 73, isolating the soil in the storage frame 52 from the soil outside; When the pressing plate 54 drives the return spring telescopic rod 59 to compress, the clamping plate 714 on the pressing plate 54 moves to squeeze the wedge plate 77, and then resets and clamps on the wedge block 76 under the action of the second spring telescopic rod 715; then the inner rotating tube 6 is driven to rotate counterclockwise by rotating the handle 95 counterclockwise, and the storage frame 52 is pulled to move inside the outer probe tube 1 under the action of the hinged rod 55; During the movement of the storage frame 52 toward the interior of the outer probe tube 1, the upper end of the wedge plate 77 on the storage frame 52 squeezes the L-shaped rod 79, causing the wedge plate 77 to passively move downward and drive the third spring telescopic rod 78 to be compressed, thereby causing the wedge block 76 to move downward to release the locking state of the clamping plate 714. At this time, the reset spring telescopic rod 59 is stretched to the maximum value, and then as the hinged rod 55 continues to pull the pressure plate 54, the pressure plate 54 pulls the limiting slider 75 to slide in the spiral groove 74, driving the deflected rotating rod 71 to reset to the placement groove 73 to complete the reset of the device, and then the outer probe tube 1 is taken out of the sampling hole, and the soil in the storage frame 52 is tested to achieve the purpose of geotechnical survey of the goaf.

Claims

1. A geotechnical exploration device for a building goaf, comprising an external probe tube (1), characterized in that: The side surface of the outer probe tube (1) is provided with three vertical grooves (2) arranged in an annular shape at equal distances, a first arc groove (3) is provided on both sides of the left and right sides of the vertical groove (2), a second arc groove (4) is provided on the side of the first arc groove (3) away from the central axis of the outer probe tube (1), and the first arc groove (3) and the second arc groove (4) form an L-shaped groove; A rock and soil sampling mechanism (5) is provided in a vertical limited sliding manner inside the vertical groove (2), and an inner rotating tube (6) is provided on the rock and soil sampling mechanism (5), and the inner rotating tube (6) is rotatably connected to the center of the bottom of the inner wall of the outer probe tube (1), and the rock and soil sampling mechanism (5) is driven by rotating the inner rotating tube (6) to sample rock and soil; The rock and soil sampling mechanism (5) comprises an arc-shaped plate (51) sliding in two second arc-shaped grooves (4), a storage frame (52) being inserted into the arc-shaped plate (51), and a return spring telescopic rod (59) being fixedly connected to both upper and lower sides of the storage frame (52), and an end of the return spring telescopic rod (59) away from the storage frame (52) is fixed to a side of the arc-shaped plate (51) facing the inner rotating tube (6); Four first spring telescopic rods (53) are fixedly inserted on the side of the storage frame (52) facing the central axis of the outer probe tube (1), and the four first spring telescopic rods (53) are distributed on the storage frame (52) in a rectangular shape, a pressure plate (54) is fixedly connected to one end of the first spring telescopic rod (53) away from the storage frame (52), a hinged rod (55) is hinged to one side of the pressure plate (54) facing away from the storage frame (52), and a limit sleeve (56) is fixedly connected to one end of the hinged rod (55) away from the pressure plate (54), and the limit sleeve (56) is vertically limited and slidably arranged on the outer wall of the inner rotating tube (6); Four vertical grooves (57) are formed on the inner rotating tube (6), and a fixing block (58) is slidably connected in the vertical groove (57), and the fixing block (58) is fixed on the inner wall of the limiting sliding sleeve (56).

2. The building goaf geotechnical investigation device according to claim 1 is characterized by: The rock and soil sampling mechanism (5) is also provided with an auxiliary collection mechanism (7), the auxiliary collection mechanism (7) comprising four rotating rods (71) extending transversely through the storage frame (52), the four rotating rods (71) being arranged in a rhombus shape, the front ends of the rotating rods (71) being fixedly connected with deflection plates (72), the deflection plates (72) being embedded in placement grooves (73) provided on the inner wall of the storage frame (52); A spiral groove (74) is formed on the rear end of the rotating rod (71), and a limiting slider (75) abuts against the spiral groove (74). The limiting slider (75) is fixed on a side of the pressing plate (54) facing the storage frame (52), and the pressing plate (54) is slidably arranged on the four rotating rods (71).

3. The construction goaf geotechnical investigation device according to claim 2 is characterized in that: The auxiliary collection mechanism (7) further comprises two clamping plates (714) rotatably connected to the left and right sides of the pressing plate (54); the side of the clamping plate (714) facing away from the pressing plate (54) is an inclined surface; a second spring telescopic rod (715) is hingedly connected between the upper side of the clamping plate (714) and the side surface of the pressing plate (54); A wedge block (76) for use with the clamping plate (714) is provided on the side of the clamping plate (714) facing the inner wall of the outer probe tube (1), a wedge plate (77) is fixedly connected to the wedge block (76), a third spring telescopic rod (78) is fixedly connected to the side of the wedge plate (77) facing the inner wall of the outer probe tube (1), and the lower end of the third spring telescopic rod (78) is fixed to the outer wall of the storage frame (52); An L-shaped rod (79) is abutted against the chamfered surface of the wedge-shaped plate (77), an inverted V-shaped push frame (710) is fixed to one end of the L-shaped rod (79) away from the wedge-shaped plate (77), the inverted V-shaped push frame (710) is fixed on a side of the arc-shaped plate (51) facing the inner rotating tube (6), and two inverted V-shaped push frames (710) are located on both sides of the upper and lower sides of the storage frame (52); The left and right sides and the upper and lower sides of the inverted V-shaped push frame (710) are both provided with sealing plates (711), the sealing plate (711) being slidably arranged inside the second arc-shaped groove (4), and one end of the sealing plate (711) being fixedly connected to a return spring (712), and one end of the return spring (712) away from the sealing plate (711) being fixed to the inner wall of the second arc-shaped groove (4).

4. The device for geotechnical investigation of building goaf according to claim 3, characterized in that: The sealing plate (711) is provided with inclined surfaces (713) on both upper and lower sides, and the inclined surfaces (713) on the sealing plate (711) are squeezed by the inverted V-shaped push frame (710), so that the sealing plate (711) slides in the second arc groove (4) and squeezes the return spring (712) to be compressed.

5. The device for geotechnical investigation of building goaf according to claim 1, characterized in that: An adjusting mechanism (8) is provided inside the inner rotating tube (6), the adjusting mechanism (8) comprising a fixed tooth plate (81) fixed on the inner wall of the inner rotating tube (6), and the fixed tooth plate (81) is fixedly connected to the lowermost fixed block (58); The fixed tooth plate (81) is meshed with a sliding gear (82), and the rotating shaft of the sliding gear (82) passes through the vertical groove (57) and rotates on the inner wall of the middle limit sliding sleeve (56), and the two ends of the rotating shaft of the sliding gear (82) are rotatably connected to a fixed frame (83), the side surface of the fixed frame (83) is provided with a thread, and the external thread of the fixed frame (83) is connected to an inner spiral sleeve (84), and the inner spiral sleeve (84) is rotatably connected to the inner wall of the inner rotating tube (6), and the upper end of the inner spiral sleeve (84) extends to the upper side of the upper end of the inner rotating tube (6); The sliding gear (82) is meshed with a sliding tooth plate (85), the sliding tooth plate (85) is fixed on the upper fixed block (58), and the sliding tooth plate (85) is slidably connected to the inner wall of the inner rotating tube (6).

6. The geotechnical investigation device for building goaf according to claim 1, characterized in that: The upper end of the inner rotating tube (6) is fixedly connected to a driving mechanism (9), the driving mechanism (9) comprising a hollow sleeve (91) fixed to the top end of the inner rotating tube (6), the upper end of the inner wall of the hollow sleeve (91) is fixedly connected to a fixed clamping gear (92), the bottom surface of the fixed clamping gear (92) is in contact with a movable clamping gear (93), and the movable clamping gear (93) is slidably arranged on the inner wall of the hollow sleeve (91); The lower end of the movable latch gear (93) is fixedly connected to a compression spring (94), and the lower end of the compression spring (94) is fixed to the top end of the inner spiral tube (6). The movable latch gear (93) is vertically limited and slidably sleeved on the outer wall of the inner spiral sleeve (84). The upper end of the movable latch gear (93) is fixedly connected to a handle (95).

7. The device for geotechnical investigation of building goaf according to claim 4, characterized in that: Both ends of the inverted V-shaped push frame (710) are fixedly connected with protrusions, and the inverted V-shaped push frame (710) is fixed on the arc-shaped plate (51) via the protrusions.

8. The device for geotechnical investigation of building goaf according to claim 1, characterized in that: The bottom surface of the outer probe tube (1) is a cone, and a fan-shaped block is fixedly connected to the upper end of the outer side of the outer probe tube (1).

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