A device for measuring the depth of surface cracks in engineering geology

Abstract

This invention discloses an engineering geological surface crack depth measuring device, comprising two U-shaped loading frames arranged parallel to each other. An adjustment mechanism is slidably mounted on the top of both U-shaped loading frames. A measuring mechanism is fixedly connected to the bottom of the middle part of the adjustment mechanism. A first support portion and a second support portion are slidably connected to the two vertical sides of each U-shaped loading frame. The adjustment mechanism includes a first movable toothed rod and a second movable toothed rod. The first movable toothed rod is slidably connected to the top of one U-shaped loading frame, and the second movable toothed rod is slidably connected to the top of the other U-shaped loading frame. An adjustment portion is slidably connected between the first and second movable toothed rods. The measuring mechanism is fixedly connected to the bottom of the middle part of the adjustment portion. This invention provides an engineering geological surface crack depth measuring device with small measurement error, strong adaptability, and high stability.

Description

Technical Field

[0001] This invention belongs to the field of measurement technology, and in particular relates to a device for measuring the depth of surface cracks in engineering geology. Background Technology

[0002] Engineering geological investigation is a geological survey and research work conducted to identify the geological factors affecting engineering structures, such as natural geological phenomena and natural building materials, which are generally referred to as engineering geological conditions. After identifying the engineering geological conditions, it is necessary to predict the mode, characteristics, and scale of the interaction between the engineering structure and the engineering geology, based on the structural and operational characteristics of the designed structure.

[0003] Currently, in the process of engineering geological exploration, it is sometimes necessary to use devices such as ultrasonic rangefinders to measure the depth of geological cracks. However, when existing measuring devices are used for field measurements, their measuring positions are relatively fixed. When different data in the same direction need to be detected, the measuring instrument position is often moved manually, resulting in poor stability of the measurement results and thus affecting the accuracy of the data. Based on the above problems, we designed an engineering geological surface crack depth measuring device. Summary of the Invention

[0004] The purpose of this invention is to provide an engineering geological surface crack depth measuring device to solve the above-mentioned problems, improve measurement accuracy, adapt to measurement in more situations, and improve measurement stability while reducing errors.

[0005] To achieve the above objectives, the present invention provides the following solution: an engineering geological surface crack depth measuring device, comprising two U-shaped loading frames arranged in parallel to each other, an adjustment mechanism being slidably arranged at the top of the two U-shaped loading frames, a measuring mechanism being fixedly connected to the bottom of the middle part of the adjustment mechanism, and a first support part and a second support part being slidably connected to the two vertical sides of the U-shaped loading frames respectively;

[0006] The adjustment mechanism includes a first movable rack and a second movable rack. The first movable rack is slidably connected to the top of one of the U-shaped loading frames, and the second movable rack is slidably connected to the top of another U-shaped loading frame. An adjustment part is slidably connected between the first movable rack and the second movable rack, and the measuring mechanism is fixedly connected to the bottom of the middle part of the adjustment part.

[0007] Preferably, the top end of the U-shaped loading frame is fixedly connected to the bottom end of the second connecting rod, and the bottom end of the second connecting rod away from the U-shaped loading frame is fixedly connected to the first motor. The output shaft of the first motor is fixedly connected to the first transmission gear, and the first transmission gear meshes with the lower rack at the bottom end of the first moving rack. The top end of the second connecting rod is fixedly connected to the side of the first transmission gear, and the first slider is slidably disposed in the first outer groove opened on the outer side wall of the first moving rack.

[0008] Another U-shaped loading frame has a third connecting rod fixedly connected to its bottom end. The bottom end of the third connecting rod is rotatably connected to a second motor on the side away from the U-shaped loading frame. The output shaft of the second motor is fixedly connected to a second transmission gear. The second transmission gear meshes with the lower rack at the bottom end of the second moving rack. A second slider is fixedly connected to the top end of the third connecting rod near the second transmission gear. The second slider is slidably disposed in a second outer groove opened on the outer side wall of the second moving rack.

[0009] Preferably, the adjusting part includes an I-shaped slide bar, with its two ends slidably connected to the first moving rack and the second moving rack, respectively. A connecting block is fixedly connected to the middle of the top end of the I-shaped slide bar, and a dual-axis motor is fixedly connected to the top end of the connecting block. The two output shafts of the dual-axis motor are respectively fixedly connected to a transmission shaft. A moving gear is fixedly connected to the end of the transmission shaft away from the dual-axis motor. One of the moving gears meshes with the upper rack at the top end of the first moving rack, and the other moving gear meshes with the upper rack at the top end of the second moving rack. The measuring mechanism is fixedly connected to the middle of the bottom end of the I-shaped slide bar.

[0010] Preferably, the inner wall of the first movable toothed rod is provided with a first inner groove, and a first sliding groove is fixedly provided in the first inner groove; the inner wall of the second movable toothed rod is provided with a second inner groove, and a second sliding groove is fixedly provided in the second inner groove; the two ends of the I-shaped slide rod are respectively slidably disposed in the first sliding groove and the second sliding groove.

[0011] Preferably, the measuring mechanism includes a first connecting rod, the top end of which is fixedly connected to the middle of the bottom end of the I-beam slide bar, a supporting base plate is hinged to the bottom end of the first connecting rod, a depth measuring instrument is fixedly connected to the middle of the bottom end of the supporting base plate, a first leveling part is provided at the top end of the supporting base plate, and a second leveling part is provided at the bottom end of the supporting base plate.

[0012] Preferably, the first leveling part includes a plurality of hydraulic struts, which are equally spaced along the circumference of the first connecting rod. The top end of each hydraulic strut is ball-jointed to the outer wall of the first connecting rod, and the bottom end of each hydraulic strut is ball-jointed to the outer edge of the top end of the support base plate.

[0013] The second leveling section includes several balancing hydraulic cylinders, the piston ends of which are respectively fixedly connected to the four corners of the bottom of the support base plate, and the bottom of each balancing hydraulic cylinder is fixedly connected to a movable wheel.

[0014] Preferably, the first support includes a first load-bearing rod, the bottom end of which is slidably disposed in a first movable groove opened on the vertical side of the U-shaped loading frame, the top end of the first load-bearing rod is rotatably connected to the bottom end of a second load-bearing rod, the top end of the second load-bearing rod is rotatably connected to the top end of a third load-bearing rod, a second movable groove is opened on the first load-bearing rod, the bottom end of the third load-bearing rod is slidably disposed in the second movable groove, and the top end of the second load-bearing rod is detachably connected to the end of the first movable toothed rod.

[0015] Preferably, a first insert rod is fixedly connected to the top of the second load-bearing rod on the side away from the third load-bearing rod, and a first slot is provided on the first movable toothed rod, with the first insert rod being adapted to the first slot.

[0016] Preferably, the second support includes a fifth load-bearing rod, the bottom end of which is slidably disposed in a third moving groove opened on the vertical side of the U-shaped loading frame, the top end of which is rotatably connected to the bottom end of a sixth load-bearing rod, the top end of which is rotatably connected to the top end of a fourth load-bearing rod, a fourth moving groove opened on the fifth load-bearing rod, the bottom end of which is slidably disposed in the fourth moving groove, and the top end of the sixth load-bearing rod is detachably connected to the end of the first moving toothed rod.

[0017] Preferably, a second insert is fixedly connected to the top of the sixth load-bearing rod on the side away from the fourth load-bearing rod, and a second slot is provided on the first movable toothed rod, with the second insert fitting into the second slot.

[0018] The present invention has the following technical effects:

[0019] The first and second support parts, which are slidably connected on the two vertical sides of the U-shaped loading frame, allow the first and second moving racks to slide out and support the device when measuring cliff-like locations. The adjustment part allows the measuring mechanism to move horizontally in the first and second moving racks. The bidirectional balance in the measuring mechanism makes the measuring mechanism more stable and the data more accurate during the measurement process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the left-side structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the assembly structure of the load-bearing components of the present invention.

[0025] The components include: 1. Moving gear; 2. Drive shaft; 3. First connecting rod; 4. First moving rack; 5. Upper rack; 6. First transmission gear; 7. Second connecting rod; 8. First slider; 9. Second slider; 10. Third connecting rod; 11. Second transmission gear; 12. Lower rack; 14. Hydraulic strut; 15. Support base plate; 16. Depth measuring instrument; 17. Balance hydraulic cylinder; 18. First roller; 19. Second roller; 20. First moving groove; 21. First load-bearing rod; 22. Second moving groove; 23. Second load-bearing rod; 24. 25. First slot; 26. Third load-bearing rod; 27. Second moving rack; 28. Loading frame; 29. ​​Positioning leg; 30. Adjusting block; 31. Dual-axis motor; 32. Connecting block; 33. First motor; 34. Second motor; 35. I-beam slide bar; 36. First slide groove; 37. Positioning wheel; 38. Second slide groove; 39. Fourth moving groove; 40. Moving wheel; 41. Second slot; 42. First insertion rod; 43. Second insertion rod; 44. Fourth load-bearing rod; 45. Fifth load-bearing rod; 46. Third moving groove; 47. Sixth load-bearing rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Reference Figure 1-4 The present invention discloses an engineering geological surface crack depth measuring device, including two U-shaped loading frames 27 arranged in parallel to each other. An adjustment mechanism is slidably arranged at the top of the two U-shaped loading frames 27. A measuring mechanism is fixedly connected to the bottom of the middle part of the adjustment mechanism. A first support part and a second support part are slidably connected to the two vertical sides of the U-shaped loading frame 27 respectively.

[0029] The adjustment mechanism includes a first movable rack 4 and a second movable rack 26. The first movable rack 4 is slidably connected to the top of a U-shaped loading frame 27, and the second movable rack 26 is slidably connected to the top of another U-shaped loading frame 27. An adjustment part is slidably connected between the first movable rack 4 and the second movable rack 26. The measuring mechanism is fixedly connected to the bottom of the middle part of the adjustment part.

[0030] Furthermore, positioning legs 28 are provided at the bottom of the two U-shaped loading frames 27, and adjusting blocks 29 are provided on the inner side of the bottom of the vertical ends of the two U-shaped loading frames 27.

[0031] The height of the loading frame 27 on the corresponding side can be adjusted by moving the adjusting block 29 up and down, so that the height of the loading frames 27 on both sides is the same, thereby effectively reducing the impact of the ground height difference on the measurement results of the measuring mechanism.

[0032] In a further optimized design, a second connecting rod 7 is fixedly connected to the bottom of a U-shaped loading frame 27. A first motor 32 is fixedly connected to the bottom of the second connecting rod 7 on the side away from the U-shaped loading frame 27. A first transmission gear 6 is fixedly connected to the output shaft of the first motor 32. The first transmission gear 6 meshes with the lower rack 12 at the bottom of the first moving rack 4. A first slider 8 is fixedly connected to the top of the second connecting rod 7 on the side close to the first transmission gear 6. The first slider 8 is slidably disposed in the first outer groove opened on the outer side wall of the first moving rack 4.

[0033] Another U-shaped loading frame 27 has a third connecting rod 10 fixedly connected to its bottom end. The bottom end of the third connecting rod 10 is rotatably connected to a second motor 33 on the side away from the U-shaped loading frame 27. The output shaft of the second motor 33 is fixedly connected to a second transmission gear 11. The second transmission gear 11 meshes with the lower rack 12 at the bottom end of the second moving rack 26. The top end of the third connecting rod 10 is fixedly connected to a second slider 9 on the side near the second transmission gear 11. The second slider 9 is slidably disposed in the second outer groove opened on the outer side wall of the second moving rack 26.

[0034] Furthermore, the first slider 8 is provided with a second roller 19 at both the top and bottom, and the second slider 9 is provided with a first roller 18 at both the top and bottom.

[0035] The slots on the outer sides of the first moving rack 4 and the second moving rack 26 allow the first slider 8 and the second slider 9 to move left and right via the first motor 32 and the second motor 33, thereby extending the measurement range.

[0036] Further optimization of the scheme: the adjustment unit includes an I-beam slide bar 34, with both ends of the I-beam slide bar 34 slidably connected to the first moving rack 4 and the second moving rack 26 respectively. A connecting block 31 is fixedly connected to the middle of the top of the I-beam slide bar 34, and a dual-axis motor 30 is fixedly connected to the top of the connecting block 31. The two output shafts of the dual-axis motor 30 are fixedly connected to the transmission shafts 2 respectively. A moving gear 1 is fixedly connected to the end of the transmission shaft 2 away from the dual-axis motor 30. One moving gear 1 meshes with the upper rack 5 at the top of the first moving rack 4, and the other moving gear 1 meshes with the upper rack 5 at the top of the second moving rack 26. The measuring mechanism is fixedly connected to the middle of the bottom end of the I-beam slide bar 34.

[0037] The dual-axis motor 30 drives the moving gears 1 at both ends through the transmission shaft 2 to move on the first moving rack 4 and the second moving rack 26. The I-beam slide bar enables the measuring mechanism to move horizontally along the first moving rack 4 and the second moving rack 26.

[0038] In a further optimized design, the inner wall of the first moving toothed rod 4 is provided with a first inner groove, and a first sliding groove 35 is fixedly provided in the first inner groove. The inner wall of the second moving toothed rod 26 is provided with a second inner groove, and a second sliding groove 37 is fixedly provided in the second inner groove. The two ends of the I-beam slide rod 34 are respectively slidably disposed in the first sliding groove 35 and the second sliding groove 37.

[0039] Furthermore, positioning wheels 36 are provided at both ends of the I-beam slide bar 34.

[0040] The positioning wheel 36 and the I-beam slide bar 34 move within the first slide groove 35 and the second slide groove 37.

[0041] The design is further optimized. The measuring mechanism includes a first connecting rod 3. The top of the first connecting rod 3 is fixedly connected to the middle of the bottom of the I-beam slide bar 34. A support base plate 15 is hinged to the bottom of the first connecting rod 3. A depth measuring instrument 16 is fixedly connected to the middle of the bottom of the support base plate 15. A first leveling part is provided at the top of the support base plate 15, and a second leveling part is provided at the bottom of the support base plate 15.

[0042] The first and second leveling parts work together to keep the support base plate 15 in a relatively balanced state, increasing measurement stability.

[0043] Further optimization of the scheme: the first leveling part includes a number of hydraulic struts 14, which are equally spaced around the first connecting rod 3. The top of the hydraulic strut 14 is connected to the outer wall of the first connecting rod 3 by a ball joint, and the bottom of the hydraulic strut 14 is connected to the outer edge of the top of the support base plate 15 by a ball joint.

[0044] The second leveling section includes several balancing hydraulic cylinders 17. The piston ends of the several balancing hydraulic cylinders 17 are fixedly connected to the four corners of the bottom of the support base plate 15, and the bottom of the balancing hydraulic cylinders 17 is fixedly connected to the moving wheels 39.

[0045] The bidirectional balancing setting of the hydraulic cylinder 17 and the hydraulic strut 14 reduces measurement errors caused by uneven road surfaces during the measurement process.

[0046] The scheme is further optimized. The first support part includes a first load-bearing rod 21. The bottom end of the first load-bearing rod 21 is slidably set in the first moving groove 20 opened on the vertical side of the U-shaped loading frame 27. The top end of the first load-bearing rod 21 is rotatably connected to the bottom end of the second load-bearing rod 23. The top end of the second load-bearing rod 23 is rotatably connected to the top end of the third load-bearing rod 25. A second moving groove 22 is opened on the first load-bearing rod 21. The bottom end of the third load-bearing rod 25 is slidably set in the second moving groove 22. The top end of the second load-bearing rod 23 is detachably connected to the end of the first moving toothed rod 4.

[0047] The movement of the first moving rack 4 and the second moving rack 26 causes the first supporting rod 21 to slide upward in the first moving groove 20, and the third supporting rod 25 to slide in the second moving groove 22, forming a triangular structure with the second supporting rod 23 to support the first moving rack 4 and the second moving rack 26.

[0048] In a further optimized design, a first insert rod 41 is fixedly connected to the top of the second load-bearing rod 23 on the side away from the third load-bearing rod 25. A first slot 24 is provided on the first moving toothed rod 4, and the first insert rod 41 is adapted to the first slot 24.

[0049] When the first moving toothed rod 4 and the second moving toothed rod 26 extend to the right during the measurement process, the first insert rod 41 is inserted into the first slot 24 at one end of the first moving toothed rod 4 and the second moving toothed rod 26.

[0050] The scheme is further optimized. The second support part includes a fifth load-bearing rod 44. The bottom end of the fifth load-bearing rod 44 is slidably set in the third moving groove 45 opened on the vertical side of the U-shaped loading frame 27. The top end of the fifth load-bearing rod 44 is rotatably connected to the bottom end of the sixth load-bearing rod 46. The top end of the sixth load-bearing rod 46 is rotatably connected to the top end of the fourth load-bearing rod 43. A fourth moving groove 38 is opened on the fifth load-bearing rod 44. The bottom end of the fourth load-bearing rod 43 is slidably set in the fourth moving groove 38. The top end of the sixth load-bearing rod 46 is detachably connected to the end of the first moving toothed rod 4.

[0051] The movement of the first moving rack 4 and the second moving rack 26 causes the fifth supporting rod 44 to slide upward in the third moving groove 45, and the fourth supporting rod 43 to slide in the fourth moving groove 38, forming a triangular structure with the sixth weighing rod to support the first moving rack 4 and the second moving rack 26.

[0052] In a further optimized design, a second insert rod 42 is fixedly connected to the top of the sixth load-bearing rod 46 on the side away from the fourth load-bearing rod 43. A second slot 40 is provided on the first moving toothed rod 4, and the second insert rod 42 is adapted to the second slot 40.

[0053] During the measurement process, as the first moving toothed rod 4 and the second moving toothed rod 26 extend towards the seat, the second insert rod 42 is inserted into the second slot 40 at the other end of the first moving toothed rod 4 and the second moving toothed rod 26.

[0054] The working process of this invention is as follows:

[0055] This device uses a dual-axis motor 30 to drive the transmission gears 1 at both ends of the transmission shaft 2, which in turn drive the measuring mechanism on the first connecting rod 3 to move the upper rack 5 of the first gear 4 and the second gear 26. Two first motors 32 and two second motors 33 drive the first transmission gear 6 and the second transmission gear 11 to rotate. The first slider 8 and the second slider 9 slide in the grooves opened on the outer side of the first moving gear 4 and the second moving gear 26, driving the first moving gear 4 and the second moving gear 26 to move left and right. The measuring mechanism drives the I-beam slide bar 34 through the dual-axis motor 30. The upper and lower parts of both ends of the I-beam slide bar 34 are provided with positioning wheels 36 to facilitate the horizontal movement of the measuring mechanism in the first slide groove 35 and the second slide groove 37. When the measurement site is uneven, the hydraulic support rod 14 extends or shortens, and the balancing hydraulic cylinder 17 shortens or extends accordingly. Through the bidirectional balancing setting of several balancing hydraulic cylinders 17 and several hydraulic support rods 14, the measurement process is more stable and the error is smaller.

[0056] When the measuring device needs to measure the depth of a cliff-like location, the operator needs to insert two first insertion rods 41 or two second insertion rods 42 into the first slot 24 or the second slot 40.

[0057] When the first insert rod 41 is inserted into the first slot 24, the movement of the first moving toothed rod 4 and the second moving toothed rod 26 causes the first supporting rod 21 to slide upward in the first moving groove 20, and the third supporting rod 25 to slide in the second moving groove 22, forming a triangular structure with the second supporting rod 23 to support the first moving toothed rod 4 and the second moving toothed rod 26.

[0058] When the second insert rod 42 is inserted into the second slot 40, the movement of the first moving toothed rod 4 and the second moving toothed rod 26 causes the fifth load-bearing rod 44 to slide upward in the third moving groove 45, and the fourth load-bearing rod 43 to slide in the fourth moving groove 38, forming a triangular structure with the sixth weighing rod to support the first moving toothed rod 4 and the second moving toothed rod 26.

[0059] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An engineering geological surface crack depth measuring device, characterized by, It includes two U-shaped loading racks (27) arranged parallel to each other. The top of the two U-shaped loading racks (27) are slidably provided with an adjustment mechanism. The bottom of the middle part of the adjustment mechanism is fixedly connected with a measuring mechanism. The two vertical sides of the U-shaped loading racks (27) are respectively slidably connected with a first support part and a second support part. The adjustment mechanism includes a first movable rack (4) and a second movable rack (26). The first movable rack (4) is slidably connected to the top of one of the U-shaped loading frames (27), and the second movable rack (26) is slidably connected to the top of another U-shaped loading frame (27). An adjustment part is slidably connected between the first movable rack (4) and the second movable rack (26). The measuring mechanism is fixedly connected to the bottom of the middle part of the adjustment part. The first support includes a first load-bearing rod (21), the bottom end of the first load-bearing rod (21) is slidably disposed in the first moving groove (20) opened on the vertical side of the U-shaped loading frame (27), the top end of the first load-bearing rod (21) is rotatably connected to the bottom end of the second load-bearing rod (23), the top end of the second load-bearing rod (23) is rotatably connected to the top end of the third load-bearing rod (25), the first load-bearing rod (21) is provided with a second moving groove (22), the bottom end of the third load-bearing rod (25) is slidably disposed in the second moving groove (22), and the top end of the second load-bearing rod (23) is detachably connected to the end of the first moving toothed rod (4); The second support includes a fifth load-bearing rod (44), the bottom end of which is slidably disposed in the third moving groove (45) opened on the vertical side of the U-shaped loading frame (27), the top end of which is rotatably connected to the bottom end of a sixth load-bearing rod (46), the top end of which is rotatably connected to the top end of a fourth load-bearing rod (43), the fifth load-bearing rod (44) is provided with a fourth moving groove (38), the bottom end of which is slidably disposed in the fourth moving groove (38), and the top end of the sixth load-bearing rod (46) is detachably connected to the end of the first moving toothed rod (4).

2. The device for measuring the depth of surface cracks in engineering geology according to claim 1, characterized in that, The top end of the U-shaped loading frame (27) is fixedly connected to the bottom end of the second connecting rod (7). The bottom end of the second connecting rod (7) away from the U-shaped loading frame (27) is fixedly connected to the first motor (32). The output shaft of the first motor (32) is fixedly connected to the first transmission gear (6). The first transmission gear (6) meshes with the lower rack (12) at the bottom end of the first moving rack (4). The top end of the second connecting rod (7) is fixedly connected to the side of the first transmission gear (6). The first slider (8) is slidably disposed in the first outer groove opened on the outer side wall of the first moving rack (4). Another U-shaped loading frame (27) is fixedly connected to the bottom end of a third connecting rod (10). The bottom end of the third connecting rod (10) is rotatably connected to a second motor (33) on the side away from the U-shaped loading frame (27). The output shaft of the second motor (33) is fixedly connected to a second transmission gear (11). The second transmission gear (11) meshes with the lower rack (12) at the bottom end of the second moving rack (26). The top end of the third connecting rod (10) is fixedly connected to a second slider (9) on the side near the second transmission gear (11). The second slider (9) is slidably disposed in the second outer groove opened on the outer side wall of the second moving rack (26).

3. The engineering geological surface crack depth measuring device according to claim 1, characterized in that, The adjustment unit includes an I-beam slide bar (34), the two ends of which are slidably connected to the first moving rack (4) and the second moving rack (26) respectively. A connecting block (31) is fixedly connected to the middle of the top of the I-beam slide bar (34), and a dual-axis motor (30) is fixedly connected to the top of the connecting block (31). The two output shafts of the dual-axis motor (30) are fixedly connected to a transmission shaft (2). A moving gear (1) is fixedly connected to the end of the transmission shaft (2) away from the dual-axis motor (30). One of the moving gears (1) meshes with the upper rack (5) at the top of the first moving rack (4), and the other moving gear (1) meshes with the upper rack (5) at the top of the second moving rack (26). The measuring mechanism is fixedly connected to the middle of the bottom end of the I-beam slide bar (34).

4. The engineering geological surface crack depth measuring device according to claim 3, characterized in that, The first movable toothed rod (4) has a first inner groove on its inner side wall, and a first sliding groove (35) is fixedly provided in the first inner groove. The second movable toothed rod (26) has a second inner groove on its inner side wall, and a second sliding groove (37) is fixedly provided in the second inner groove. The two ends of the I-shaped sliding rod (34) are respectively slidably arranged in the first sliding groove (35) and the second sliding groove (37).

5. The engineering geological surface crack depth measuring device according to claim 3, characterized in that, The measuring mechanism includes a first connecting rod (3), the top end of the first connecting rod (3) is fixedly connected to the middle of the bottom end of the I-beam slide bar (34), a support base plate (15) is hinged to the bottom end of the first connecting rod (3), a depth measuring instrument (16) is fixedly connected to the middle of the bottom end of the support base plate (15), a first leveling part is provided at the top end of the support base plate (15), and a second leveling part is provided at the bottom end of the support base plate (15).

6. The engineering geological surface crack depth measuring device according to claim 5, characterized in that, The first leveling part includes a plurality of hydraulic struts (14), which are equally spaced along the circumference of the first connecting rod (3). The top end of the hydraulic strut (14) is ball-jointed to the outer wall of the first connecting rod (3), and the bottom end of the hydraulic strut (14) is ball-jointed to the outer edge of the top end of the support base plate (15). The second leveling part includes a plurality of balancing hydraulic cylinders (17), the piston ends of the plurality of balancing hydraulic cylinders (17) are respectively fixedly connected to the four corners of the bottom end of the support base plate (15), and the bottom end of the balancing hydraulic cylinders (17) is fixedly connected to a moving wheel (39).

7. The engineering geological surface crack depth measuring device according to claim 1, characterized in that, The top of the second load-bearing rod (23) is fixedly connected to the side away from the third load-bearing rod (25) with a first insert rod (41). The first movable toothed rod (4) is provided with a first slot (24), and the first insert rod (41) is adapted to the first slot (24).

8. The engineering geological surface crack depth measuring device according to claim 1, characterized in that, The sixth load-bearing rod (46) has a second insert rod (42) fixedly connected to the side away from the fourth load-bearing rod (43) at its top end. The first moving toothed rod (4) has a second slot (40) provided on it. The second insert rod (42) is adapted to the second slot (40).

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