An adaptive tunnel underbreak detection device

Abstract

The application discloses a self-adaptive tunnel ultra-undercutting detection device. It comprises a moving trolley and a detector. The moving trolley is provided with a vertically arranged electric telescopic rod. The electric telescopic rod is connected with the moving trolley through a rotating mechanism capable of locking left and right rotating angles. The top of the electric telescopic rod is connected with the detector through an automatic adjusting mechanism. The automatic adjusting mechanism comprises a supporting plate, a universal ball structure and an adjusting rod. The universal ball structure is arranged on the supporting plate. The adjusting rod penetrates the universal ball structure in an axial direction. The top end of the adjusting rod is connected with the detector. The bottom end of the adjusting rod is provided with a stop block. A spring is arranged on the adjusting rod and located between the detector and the universal ball structure. The angle of the detector can be conveniently adjusted. The self-adaptive adjusting angle is large. The detector can always be close to the measured surface of the tunnel, the detection precision is improved, and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, and in particular to a self-adaptive tunnel overbreak and underbreak detection device. BACKGROUND

[0002] The current double-line tunnel generally adopts single center or three centers in design, that is, the inner contour line of the tunnel is a circular arc or three circular arcs with different radii of curvature. When the tunnel is completed according to the design drawing, it is necessary to detect the overbreak and underbreak of the tunnel to determine whether the tunnel clearance meets the design section requirements. The overbreak and underbreak not only affects the construction cost, but also has a great impact on the stability of the surrounding rock. According to the design requirements, the part of the actual excavation section outside the reference line is called overbreak, and the part inside the reference line is called underbreak.

[0003] Chinese Patent Publication No. CN220772172U discloses a tunnel detection device convenient to operate. The patent sets an angle-adjustable support pipe on the cart, sets a detector for detecting overbreak and underbreak on the top of the support pipe, adjusts the angle of the detector by adjusting the angle of the support pipe, and makes the detector closely adhere to the corresponding tunnel measured surface. The detector closely adheres to the tunnel measured surface through the automatic angle adjustment of the adjusting springs at the four corners of the bottom. The deficiency of the patent is that the angle adjustable by the adjusting spring is small, the adhesion effect of the detector to the tunnel measured surface is poor, the mechanism for adjusting the angle of the support pipe is complex, and the angle adjustment operation is tedious. SUMMARY

[0004] The present application provides a self-adaptive tunnel overbreak and underbreak detection device to solve the above technical problems. The angle of the detector is convenient to adjust, the self-adaptive angle adjustment is large, the detector can always closely adhere to the tunnel measured surface, the detection accuracy is improved, and the operation is convenient.

[0005] To solve the above problems, the present application adopts the following technical solutions:

[0006] The self-adaptive tunnel overbreak and underbreak detection device of the present application comprises a mobile cart and a detector. A vertical electric telescopic rod is arranged on the mobile cart. The electric telescopic rod is connected with the mobile cart through a rotating mechanism capable of locking the left and right rotating angles. The top of the electric telescopic rod is connected with the detector through an automatic adjustment mechanism. The automatic adjustment mechanism comprises a support plate, a universal ball structure and an adjusting rod. The universal ball structure is arranged on the support plate. The adjusting rod penetrates the universal ball structure in the axial direction. The top end of the adjusting rod is connected with the detector. The bottom end of the adjusting rod is provided with a stop block. A spring is sleeved on the adjusting rod and located between the detector and the universal ball structure.

[0007] In the scheme, when detecting, the angle of the electric telescopic rod is first adjusted to make the detector face the measured surface of the tunnel, then the electric telescopic rod is extended upward to lift the detector to contact the measured surface of the tunnel, the detector is forced to contact the measured surface of the tunnel, the force is transmitted to the adjusting rod, the adjusting rod is forced to slide relative to the universal ball structure and can drive the universal ball structure to rotate to automatically fine-tune the angle of the detector, and the spring is matched to ensure that the detector always closely contacts the measured surface of the tunnel, thereby improving the detection precision, then the mobile trolley is advanced along a straight line parallel to the tunnel, and the detector detects the over-excavation and under-excavation data. When the detector does not contact the tunnel, the stop block abuts against the bottom of the universal ball structure to limit the adjusting rod from being out of the universal ball structure.

[0008] Preferably, the bottom of the detector is provided with a plurality of guide rods, the guide rods are parallel to the adjusting rod, and the support plate is provided with guide holes corresponding to the positions of the guide rods for the guide rods to pass through, and the diameters of the guide holes are greater than the diameters of the guide rods.

[0009] Preferably, the universal ball structure comprises a ball head base and a ball head, the ball head base is provided with a ball head movable cavity longitudinally penetrating the ball head base, the ball head is movably arranged in the ball head movable cavity, the adjusting rod penetrates the ball head in the axial direction and can slide relative to the ball head, the support plate is provided with a first through hole, the first through hole is located below the ball head movable cavity, and the stop block is located below the ball head.

[0010] Preferably, the top of the electric telescopic rod and the automatic adjusting mechanism are further provided with an electric rotating seat that can rotate left and right.

[0011] When the electric telescopic rod is extended upward to lift the detector to approach the measured surface of the tunnel, the angle of the detector is first adjusted through the electric rotating seat to make the detector face the measured surface of the tunnel, and then the electric telescopic rod lifts the detector to contact the measured surface of the tunnel, which can avoid that the angle between the detector and the measured surface of the tunnel is too large to exceed the adjusting range of the universal ball structure, can reduce the rotating angle of the electric telescopic rod, and can prevent the electric telescopic rod from tilting due to the excessively large rotating angle.

[0012] Preferably, the top of the electric rotating seat is provided with a force sensor, and the top of the force sensor is provided with a connecting bracket connected with the automatic adjusting mechanism.

[0013] The force sensor is used to detect the force value between the detector and the measured surface of the tunnel, and when the force value is too large, the alarm on the mobile trolley gives an alarm to avoid damage to the detector.

[0014] Preferably, the rotating mechanism comprises rotating structures symmetrically arranged on the front and rear sides of the electric telescopic rod, the electric telescopic rod is sleeved with a connecting block, the rotating structure comprises a rotating seat and a rotating shaft, the inner end of the rotating shaft is fixedly connected with the connecting block, the outer end of the rotating shaft is rotatably connected with the rotating seat, and the rotating seat is provided with a locking structure for locking / loosening the rotating shaft.

[0015] As preferred, the rotating seat is provided with a rotating groove for inserting the outer end of the rotating shaft, and the top of the rotating seat is provided with a guide groove communicating with the rotating groove, and the locking structure comprises a pressing block and a pressing member, the pressing block is located in the guide groove and can slide up and down along the guide groove, the bottom of the pressing block is provided with an arc-shaped notch matched with the outer end of the rotating shaft, and the pressing member is used for pressing / tightening the pressing block and the outer end of the rotating shaft.

[0016] As preferred, the pressing member comprises a pressing plate and two locking members, the pressing block is arranged below the pressing plate, the locking member comprises a locking column and a locking block arranged at the top of the locking column, the locking block is provided with a handle, the pressing plate is provided with two second through holes corresponding to the two locking members, and the two second through holes are respectively located on the left and right sides of the pressing block, the top of the rotating seat is provided with a threaded hole corresponding to the position of the second through hole, the lower part of the locking column is provided with an external thread matched with the threaded hole, the locking column passes through the corresponding second through hole, the lower part of the locking column is screwed with the corresponding threaded hole, and the locking block is located above the pressing plate.

[0017] As preferred, the moving trolley is further provided with a downwardly curved arc-shaped rack, and the bottom of the electric telescopic rod is rotationally connected with a gear, and the gear is engaged with the arc-shaped rack.

[0018] As preferred, the moving trolley is symmetrically provided with positioning rods which can be extended / contracted outward on the front and rear sides. The two positioning rods are extended outward by the same length, the outer ends of the positioning rods are tightly attached to the side walls of the tunnel, the moving trolley is pushed to move forward, and the moving trolley always moves along a straight line parallel to the tunnel under the action of the positioning rods.

[0019] As preferred, the electric telescopic rod is symmetrically provided with counterweights on the left and right sides of the bottom. The center of gravity of the detection device is ensured to be at the lower part.

[0020] The beneficial effects of the present application are: (1) the angle of the detector is convenient to adjust, the self-adaptive adjustment angle is large, the detector can always be tightly attached to the measured surface of the tunnel, the detection precision is improved, and the operation is convenient; (2) the force sensor can detect the force value between the detector and the measured surface of the tunnel, and the detector is prevented from being damaged due to excessive force. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of an embodiment;

[0022] Figure 2 is a structural schematic diagram of a moving trolley;

[0023] Figure 3 is a local schematic diagram of a rotating mechanism;

[0024] Figure 4 is an exploded view of a rotating structure;

[0025] Figure 5 is a structural diagram of components located above the electric telescopic rod;

[0026] Figure 6 is a sectional view of the universal ball structure;

[0027] Figure 7 is a working schematic diagram of the embodiment.

[0028] In the figure: 1, moving trolley, 2, electric telescopic rod, 3, rotating mechanism, 4, detector, 5, support plate, 6, universal ball structure, 7, adjusting rod, 8, stop block, 9, spring, 10, guide rod, 11, guide hole, 12, ball head base, 13, ball head, 14, first through hole, 15, upper ball head pressing block, 16, lower ball head pressing block, 17, linear bearing, 18, upper gasket, 19, lower gasket, 20, electric rotating seat, 21, rotating motor, 22, rotating seat, 23, force sensor, 24, connecting bracket, 25, rotating structure, 26, connecting block, 28, rotating seat, 29, rotating shaft, 30, locking structure, 31, rotating groove, 32, guide groove, 33, pressing block, 34, arc-shaped notch, 35, pressing plate, 36, locking column, 37, locking block, 38, second through hole, 39, threaded hole, 40, arc-shaped rack, 41, gear, 42, positioning rod, 43, counterweight, 44, connecting plate, 45, mounting plate, 46, conical bracket, 47, annular limiting groove, 48, support block, 49, handle, 50, tunnel, 51, third through hole, 52, locking module. DETAILED DESCRIPTION

[0029] The technical solutions of the application will be further specifically described below by embodiments in combination with the drawings.

[0030] Embodiment: A self-adaptive tunnel over-excavation detection device of the embodiment is as shown in the figure Figures 1 to 6As shown, including mobile trolley 1 and detector 4, detector 4 is range finder, mobile trolley 1 is symmetrical and provided with positioning rod 42 which can be extended / retracted outward on both sides, mobile trolley 1 is provided with vertically arranged electric telescopic rod 2, electric telescopic rod 2 is connected with mobile trolley 1 through rotating mechanism 3 which can lock left and right rotating angle, electric telescopic rod 2 is provided with connecting plate 44 on top, connecting plate 44 is provided with electric rotating seat 20 which can rotate left and right on top, electric rotating seat 20 includes rotating seat 22 and rotating motor 21 for driving rotating seat 22 to rotate left and right, rotating seat 22 is provided with force sensor 23 on top, force sensor 23 is provided with U-shaped connecting bracket 24 on top, connecting bracket 24 is provided with automatic adjusting mechanism on top, automatic adjusting mechanism includes support plate 5, universal ball structure 6, adjusting rod 7, support plate 5 is arranged on the top of connecting bracket 24, universal ball structure 6 is arranged on the top of support plate 5, universal ball structure 6 includes ball head base 12 and ball head 13, ball head base 12 is provided with ball head movable cavity which penetrates ball head base 12 longitudinally, ball head 13 is movably arranged in ball head movable cavity, adjusting rod 7 penetrates ball head 13 in axial direction, linear bearing 17 is arranged between adjusting rod 7 and ball head 13, linear bearing 17 is provided with stop ring on top, stop ring is located above ball head 13, support plate 5 is provided with first through hole 14, first through hole 14 is located below ball head movable cavity, diameter of first through hole 14 is larger than opening diameter of bottom end of ball head movable cavity, adjusting rod 7 penetrates first through hole 14, stop block 8 is arranged at the bottom end of adjusting rod 7, stop block 8 is located below ball head 13, detector 4 is installed with mounting plate 45 at the bottom, mounting plate 45 is arranged on the top of adjusting rod 7, spring 9, upper gasket 18 and lower gasket 19 are further sleeved on adjusting rod 7, upper gasket 18 is located above stop ring, spring 9 is located between mounting plate 45 and upper gasket 18, lower gasket 19 is located between ball head 13 and stop block 8, guiding rod 10 is symmetrically arranged on the bottom of mounting plate 45, guiding rod 10 is parallel to adjusting rod 7, guiding hole 11 is arranged on support plate 5 corresponding to the position of guiding rod 10, guiding hole 11 is larger in diameter than guiding rod 10. The central axes of adjusting rod 7, mounting plate 45 and detector 4 are located on the same straight line.

[0031] Ball head base 12 includes ball head upper pressing block 15 and ball head lower pressing block 16, ball head upper pressing block 15 and ball head lower pressing block 16 are detachably connected, ball head upper pressing block 15 is provided with upper movable cavity which penetrates ball head upper pressing block 15, ball head lower pressing block 16 is provided with lower movable cavity which penetrates ball head lower pressing block 16, upper movable cavity and lower movable cavity enclose ball head movable cavity. Ball head upper pressing block and ball head lower pressing block limit ball head to move in ball head movable cavity, preventing ball head from coming out. Mobile trolley 1 is provided with controller for controlling the work of electric telescopic rod 2 and rotating motor 21.

[0032] In the scheme, as Figure 7As shown, when the detection device detects a certain measured surface of the tunnel 50, the moving trolley is adjusted to the positioning rod facing the tunnel side wall, the two positioning rods are extended outward by the same length so that the outer ends of the positioning rods are in close contact with the tunnel side wall, the angle of the electric telescopic rod is adjusted by rotating, the detector is directed to the measured surface of the tunnel, then the electric telescopic rod is extended upward to lift the detector to a height close to the measured surface of the tunnel, then the rotating motor drives the rotating seat to rotate to further adjust the angle of the detector, so that the detector is directly opposite the measured surface of the tunnel, the electric telescopic rod lifts the detector to contact the measured surface of the tunnel, the detector contacts the measured surface of the tunnel under force, the force is transmitted to the adjusting rod, the adjusting rod can slide relative to the ball head under force and can drive the ball head to rotate to automatically fine-tune the angle of the detector, and the spring is matched to ensure that the detector is always in close contact with the measured surface of the tunnel, thereby improving the detection accuracy, then the moving trolley is pushed forward, and the moving trolley always moves forward along a straight line parallel to the tunnel under the action of the positioning rod, and the detector detects the over-excavation and under-excavation data. When the detector does not contact the tunnel, the stop block abuts against the bottom of the ball head through the lower gasket, so as to limit the adjusting rod from being out of the ball head. The model of the range finder in the embodiment is GC900HF.

[0033] The present application first adjusts the angle of the electric telescopic rod through the rotating mechanism to coarsely adjust the angle of the detector, then finely adjusts the angle of the detector through the electric rotating seat when the detector approaches the measured surface of the tunnel, and finally automatically adjusts the angle of the detector through the automatic adjusting mechanism when the detector contacts the measured surface of the tunnel, so as to ensure that the detector is closely attached to the measured surface of the tunnel. The secondary angle adjustment of the electric rotating seat can avoid that the angle between the detector and the measured surface of the tunnel is too large to exceed the adjusting range of the universal ball structure, and can also reduce the rotating angle of the electric telescopic rod to prevent the electric telescopic rod from tilting due to the too large rotating angle.

[0034] When the ball head rotates under force, the mounting plate rotates and drives the guide rod to rotate, and the diameter of the guide hole is larger than the diameter of the guide rod, so that the guide rod can move in the guide hole.

[0035] The moving trolley is also provided with an alarm. The force sensor is used to detect the force value between the detector and the measured surface of the tunnel, and when the force value is too large, the alarm on the moving trolley gives an alarm to avoid damage to the detector due to too large force.

[0036] The rotating mechanism comprises rotating structures 25 symmetrically arranged on the front and back sides of the electric telescopic rod 2. The electric telescopic rod 2 is sleeved with a connecting block 26. The rotating structure 25 comprises a rotating base 28 and a rotating shaft 29. The inner end of the rotating shaft 29 is fixedly connected with the connecting block 26. The outer end of the rotating shaft 29 is rotatably connected with the rotating base 28. The rotating base 28 is provided with a locking structure 30 for locking / loosening the rotating shaft 29. The rotating base 28 is provided with a rotating groove 31 for inserting the outer end of the rotating shaft 29. The rotating shaft 29 can rotate in the rotating groove 31. The rotating base 28 is provided with a guide groove 32 in communication with the rotating groove 31. The locking structure 30 comprises a pressing block 33 and a pressing member. The pressing block 33 is located in the guide groove 32 and can slide up and down in the guide groove 32. The bottom of the pressing block 33 is provided with an arc-shaped notch 34 matched with the outer end of the rotating shaft 29. The pressing member comprises a pressing plate 35 and two locking members. The pressing block 33 is arranged below the pressing plate 35. The locking member comprises a locking column 36 and a locking block 37 arranged on the top of the locking column 36. The locking block 37 is provided with a handle 49. The pressing plate 35 is provided with two second through holes 38 for the locking column 36 to pass through. The two second through holes 38 correspond to the two locking members respectively. The two second through holes 38 are respectively located on the left and right sides of the pressing block 33. The rotating base 28 is provided with a threaded hole 39 at the top corresponding to the position of the second through hole 38. The lower part of the locking column 36 is provided with an external thread matched with the threaded hole 39. The locking column 36 passes through the corresponding second through hole 38. The lower part of the locking column 36 is threadedly connected with the corresponding threaded hole 39. The locking block 37 is located above the pressing plate 35.

[0037] When the handle is rotated forward, the locking column is rotated forward to drive the locking block to descend and press the pressing plate. The pressing block presses the rotating shaft to lock the electric telescopic rod at the current angle. When the handle is rotated reversely, the locking column is rotated reversely to drive the locking block to ascend and not contact with the pressing plate. The pressing block no longer presses the rotating shaft, so that the electric telescopic rod can be rotated to adjust the angle.

[0038] Preferably, the outer end of the rotating shaft 29 is provided with an annular limiting groove 47. The rotating groove 31 is matched with the annular limiting groove 47. The arc-shaped notch 34 is matched with the annular limiting groove 47. The cavity surrounded by the rotating groove and the arc-shaped notch cooperates with the annular limiting groove to limit the forward and backward movement of the rotating shaft. The rotating base 28 is connected with the moving trolley 1 through a conical support 46.

[0039] The moving trolley 1 is further provided with a downwardly curved arc-shaped rack 40. The electric telescopic rod 2 is rotatably connected with a gear 41 at the bottom. The gear 41 is engaged with the arc-shaped rack 40. The electric telescopic rod 2 is further provided with a locking mechanism for locking / unlocking the gear. The arc center of the arc-shaped rack 40 is located on the rotating center of the electric telescopic rod 2. The central angle of the arc-shaped rack 40 is 65-85 degrees. The electric telescopic rod 2 is symmetrically provided with counterweight blocks 43 on the left and right sides at the bottom.

[0040] The gear is engaged with the arc-shaped rack to facilitate adjustment of the rotation angle. When the angle of the electric telescopic rod needs to be adjusted, the gear is unlocked by the locking mechanism, and the gear can rotate; after the angle of the electric telescopic rod is adjusted, the gear is locked by the locking mechanism, and the gear cannot rotate, so that the electric telescopic rod is prevented from slipping due to too large rotation angle. The counterweight is used to ensure that the gravity center of the detection device is at the lower part.

[0041] The moving trolley 1 comprises a trolley frame and a plurality of universal wheels arranged at the bottom of the trolley frame, and support structures are symmetrically arranged on the front and rear sides of the trolley frame. The support structure comprises a plurality of support blocks 48 arranged in a straight line from left to right. The support blocks 48 are provided with third through holes 51 through which the positioning rods 42 pass. The positioning rods 42 pass through the third through holes 51 on the corresponding side support blocks 48. The support blocks 48 are provided with locking modules 52 for locking / loosening the positioning rods 42. The locking modules 52 comprise threaded rods and handles arranged at the top of the threaded rods. The top of the support blocks 48 is provided with screw holes communicating with the third through holes 51. The threaded rods are in threaded connection with the screw holes, and the lower parts of the threaded rods extend into the third through holes 51.

[0042] When the handle is rotated forward, the threaded rod is lowered in forward rotation to lock the positioning rod in the third through hole, and the positioning rod cannot move. When the handle is rotated reversely, the threaded rod is raised in reverse rotation to loosen the positioning rod in the third through hole, and the positioning rod can move left and right to adjust the position.

Claims

1. An adaptive tunnel over-excavation and under-excavation detection device, characterized in that, The device includes a mobile trolley (1) and a detector (4). The mobile trolley (1) is equipped with a vertically arranged electric telescopic rod (2). The electric telescopic rod (2) is connected to the mobile trolley (1) through a rotating mechanism (3) that can lock the left and right rotation angles. The top of the electric telescopic rod (2) is connected to the detector (4) through an automatic adjustment mechanism. The automatic adjustment mechanism includes a support plate (5), a universal ball structure (6), and an adjustment rod (7). The universal ball structure (6) is set on the support plate (5). The adjustment rod (7) passes through the universal ball structure (6) axially. The top of the adjustment rod (7) is connected to the detector (4). The bottom of the adjustment rod (7) is provided with a stop block (8). A spring (9) is sleeved on the adjustment rod (7). The spring (9) is located between the detector (4) and the universal ball structure (6). The detector (4) has several guide rods (10) at its bottom. The guide rods (10) are parallel to the adjusting rod (7). The support plate (5) has a guide hole (11) on the position corresponding to the guide rod (10) for the guide rod (10) to pass through. The diameter of the guide hole (11) is larger than the diameter of the guide rod (10). The universal ball structure (6) includes a ball head base (12) and a ball head (13). The ball head base (12) is provided with a ball head movable cavity that runs longitudinally through the ball head base (12). The ball head (13) is movably disposed in the ball head movable cavity. The adjusting rod (7) runs through the ball head (13) axially and can slide relative to the ball head (13). The support plate (5) is provided with a first through hole (14). The first through hole (14) is located below the ball head movable cavity. The stop block (8) is located below the ball head (13). The top of the electric telescopic rod (2) is also provided with an electric rotating seat (20) that can rotate left and right between the automatic adjustment mechanism and the top of the electric telescopic rod (2). The electric rotary seat (20) is provided with a force sensor (23) on top, and the force sensor (23) is provided with a connecting bracket (24) connected to the automatic adjustment mechanism on top. The mobile trolley (1) is also provided with a downward-curved arc rack (40), and the bottom of the electric telescopic rod (2) is rotatably connected to a gear (41), which meshes with the arc rack (40).

2. The adaptive tunnel over-excavation and under-excavation detection device according to claim 1, characterized in that, The rotating mechanism (3) includes a rotating structure (25) symmetrically arranged on the front and rear sides of the electric telescopic rod (2). A connecting block (26) is sleeved on the electric telescopic rod (2). The rotating structure (25) includes a rotating seat (28) and a rotating shaft (29). The inner end of the rotating shaft (29) is fixedly connected to the connecting block (26), and the outer end of the rotating shaft (29) is rotatably connected to the rotating seat (28). The rotating seat (28) is provided with a locking structure (30) for locking / releasing the rotating shaft (29).

3. The adaptive tunnel over-excavation and under-excavation detection device according to claim 2, characterized in that, The rotating seat (28) is provided with a rotating groove (31) for the outer end of the rotating shaft (29) to be inserted. The top of the rotating seat (28) is provided with a guide groove (32) that communicates with the rotating groove (31). The locking structure (30) includes a pressure block (33) and a pressing member. The pressure block (33) is located in the guide groove (32) and can slide up and down along the guide groove (32). The bottom of the pressure block (33) is provided with an arc-shaped notch (34) that matches the outer end of the rotating shaft (29). The pressing member is used to press / release the pressure block (33) and the outer end of the rotating shaft (29).

4. The adaptive tunnel over-excavation and under-excavation detection device according to claim 3, characterized in that, The clamping component includes a pressure plate (35) and two locking components. The pressure block (33) is located below the pressure plate (35). The locking component includes a locking post (36) and a locking block (37) located on the top of the locking post (36). The locking block (37) is provided with a handle (49). The pressure plate (35) is provided with two second through holes (38). The two second through holes (38) correspond one-to-one with the two locking components. The two second through holes (38) are located on the left and right sides of the pressure block (33). The top of the rotating seat (28) is provided with a threaded hole (39) corresponding to the position of the second through hole (38). The lower part of the locking post (36) is provided with an external thread that matches the threaded hole (39). The locking post (36) passes through the corresponding second through hole (38). The lower part of the locking post (36) is threadedly connected to the corresponding threaded hole (39). The locking block (37) is located above the pressure plate (35).

5. The adaptive tunnel over-excavation and under-excavation detection device according to claim 1, characterized in that, The mobile trolley (1) is symmetrically provided with positioning rods (42) that can extend / retract outward on both the front and rear sides.

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