CN113073523A

CN113073523A - Highway engineering is with little table department device that paves of survey

Info

Publication number: CN113073523A
Application number: CN202110431449.3A
Authority: CN
Inventors: 孙海瑞; 夏京京
Original assignee: Individual
Current assignee: Guangdong Bay Construction Infrastructure Development Group Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-07-06
Anticipated expiration: 2041-04-21
Also published as: CN113073523B

Abstract

The invention discloses a device for measuring micro-surfacing paving thickness for highway engineering, and belongs to the technical field of road construction. The utility model provides a highway engineering is with little table department thickness device that paves of survey, the on-line screen storage device comprises a base, backup pad top surface left side has set firmly the stopper, the perpendicular groove has been seted up to the position of test bar left wall for the stopper tip, the cavity has been seted up at test bar bottom surface middle part, the cavity right wall inlays and is equipped with the glass board, the cavity inner wall is linear equidistant a plurality of chutes of having seted up, the coaxial clearance mouth of having seted up in test bar top surface middle part, the inside closing cap that is equipped with of clearance mouth, two board grooves have been seted up to bilateral symmetry around the closing cap, board inslot portion outside end is equipped with the cardboard, compression spring C has set firmly between cardboard inside wall and the board. The invention can insert the test rod into the micro-meter more quickly, saves time and labor, and simultaneously ensures that the thickness measurement work has stronger rigor and strong practicability.

Description

Highway engineering is with little table department device that paves of survey

Technical Field

The invention relates to the technical field of road construction, in particular to a device for measuring micro-surfacing paving thickness for highway engineering.

Background

The micro-surfacing is a thin layer with high anti-slip and durable performances, which is prepared by mixing polymer modified asphalt, coarse and fine aggregates, fillers, water, additives and the like according to a design proportion by adopting special mechanical equipment, and is paved on an original pavement, and traffic is opened quickly.

Through retrieval, patent with publication number CN212294268U discloses a device for determining paving thickness at a micro-surface for highway engineering, which can not only clean the test pins after the completion of measurement or before the next measurement point, but also ensure that the measurement of the test pins is not affected when the paving thickness at the micro-surface is not uniform.

The mode of inserting the road surface among the current device CN211772667U is difficult to insert the test needle in firm road surface, it can be very waste time and energy to operate, and the staff both need the hard rotation top board of taking turns with its in-process of inserting the road surface, still must be careful with this device suppression, otherwise just can make this device perk because of the reaction force on ground, moreover, the device can't judge in the use whether the position of test needle tip enters into the soil of little table department below, so just cause the survey result to produce the deviation, in view of this, we provide a highway engineering with survey little table department thickness device that paves.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide a device for measuring paving thickness at a micro-surface for highway engineering, which aims to solve the problems in the background technology.

2. Technical scheme

A device for measuring paving thickness of a micro meter for highway engineering comprises a base, wherein a supporting plate is arranged above the base, two supporting plates are fixedly arranged between the front outer wall and the rear outer wall of the supporting plate and the front end and the rear end of the top surface of the base in a symmetrical structure, two side plates are symmetrically and fixedly arranged on two sides of the base, foot grooves are formed in the top surfaces of the side plates, a pressing plate is arranged on the upper portions of the foot grooves, a plurality of sliding columns are symmetrically and linearly arranged at equal intervals on the bottom surfaces of the pressing plates, column grooves are formed in the bottom surfaces of the foot grooves relative to the positions of the sliding columns, compression springs A are sleeved on the outer portions of the sliding columns, a plurality of penetrating grooves are formed in the bottom surfaces of the foot grooves in a linearly equal interval manner, anti-skid pads are arranged at the lower ends of the penetrating grooves, compression springs B are fixedly arranged between the top surfaces of the anti-skid pads and the bottom surfaces, the position of the top surface of the supporting plate, which is opposite to the rear side of the threaded seat, is fixedly provided with a servo motor, the output end of the servo motor penetrates through the top surface of the supporting plate to extend to the lower part and is coaxially and fixedly connected with a gear, the position of the lower end of the outer wall of the threaded seat, which is opposite to the gear, is provided with a plurality of tooth columns at equal intervals in an annular shape, a test rod is inserted in the threaded seat, the outer peripheral outer wall of the test rod is provided with external threads, the position of the top surface of the base, which is opposite to the test rod, is provided with a positioning hole, the test rod sequentially penetrates through the interior of the threaded seat and the positioning hole to extend to the lower part and is sleeved with a limiting ring, the lower end of the exterior of the test rod is sleeved with a drill bit, the position of the inner wall of, backup pad top surface left side has set firmly the stopper, the perpendicular groove has been seted up for the position of stopper tip to the test bar left wall, the cavity has been seted up at test bar bottom surface middle part, the cavity right wall inlays and is equipped with the glass board, the cavity inner wall is linear equidistant a plurality of chutes of having seted up, the coaxial clearance mouth of having seted up in test bar top surface middle part, clearance mouth inside is equipped with the closing cap, two board grooves have been seted up to bilateral symmetry around the closing cap, board inslot portion outside end is equipped with the cardboard, compression spring C has set firmly between cardboard inside wall and the board inslot inside wall, the draw-in groove has been seted up for the position of cardboard outside end to the clearance mouth inner wall.

The support plate is an inclined structure with a high inner side end and a low outer side end, the foot groove and the pressing plate are both structures similar to the shape of a human sole, the outer wall of the pressing plate is in sliding contact with the inner wall of the foot groove, the sliding column is in sliding fit with the column groove, and the non-slip mat is in sliding fit with the penetrating groove.

The screw thread seat and the rotating ring are in running fit with the annular groove, the lower end of the screw thread seat penetrates through the annular groove to extend to the lower portion, and the gear is meshed with the toothed column.

The external thread is in threaded connection with the threaded seat, the drill bit is of a circular ring-shaped structure, the limiting ring is in running fit with the limiting groove, the tool bit is of a triangular structure with a downward pointed end, the lower end of the extension rod is fixedly connected with the top surface of the drill bit, the base rod and the extension rod are both of arc-shaped structures, and the extension rod is in sliding fit with the inside of the base rod.

Preferably, the limiting block is of an L-shaped structure, the end part of the limiting block is in sliding fit with the vertical groove, and the inclined groove is of an inclined structure with a high inner side end and a low outer side end.

Preferably, the sealing cover and the cleaning port are both of a T-shaped structure, the sealing cover is in plug-in fit with the cleaning port, the plate groove and the clamping plate are both of an L-shaped structure, and the outer side end of the clamping plate penetrates through the opening end of the plate groove to extend to the outside and is in clamping fit with the clamping groove.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

1. the invention is provided with the drill bit, the worker can place the device at a random position of the surface of the micro-meter to be measured, then the servo motor can be used for driving the gear to drive the screw seat to rotate through the tooth column, the drill bit is driven to rotate through the base rods and the extension rods on two sides in the rotating process of the screw seat, and then a plurality of cutter heads on the bottom surface of the drill bit also do circular motion, so that the device can break the surface of the micro-meter to penetrate into the micro-meter more easily, meanwhile, because the external thread is connected with the screw seat through the thread, and the outer wall of the testing rod is also provided with the vertical groove in sliding fit with the limiting block, the testing rod can do vertical downward linear motion along the inside of the screw seat to push the drill bit to drill towards the deep position of the micro-meter under the structure, the testing rod can be inserted into the micro-meter more quickly by utilizing the structural design, time and labor are saved, and meanwhile, the thickness data of the micro, the practicability is strong.

2. The invention is provided with two side plates, before the operator breaks the micro-meter to measure the thickness by using the device, the sole can be prevented on the pressure plate along the positions of the two foot grooves, the pressure plate can press the sliding column into the column groove under the pressing of the weight of the operator and lead the compression spring B to be pressed short, the resilience force generated by the contraction of the compression spring B can only be released downwards due to the pressing of the operator on the pressure plate, the bottom surface of the non-slip mat can be attached to the ground, thus the non-slip mat can be more closely attached to the ground under the jacking force of the compression spring B, the structure can lead the device not to be tilted due to the counter-acting force of the ground under the pressing of the weight of the operator, and the non-slip mat can also avoid the side slipping, lead the test rod to be more conveniently inserted into the interior of the micro-meter to measure, lead the operation of the device to be more stable and reliable, and the operation of the staff is more convenient.

3. The testing rod is internally provided with a cavity, the testing rod and the threaded seat do not synchronously rotate through the threaded seat and the limiting block, so that the direction of the glass plate always faces to the right side, a worker can more conveniently observe the condition inside the cavity through the glass plate, the worker drives the testing rod to drill into a deeper length by using the servo motor to reversely rotate the servo motor to lift out a drill rod, a chute formed in the inner wall of the cavity can bring out soil at the lower part of the micro-surface, the worker can calculate the thickness of the micro-surface by only observing the position of the chute with the soil and comparing the inclined chute position with the previously observed relative position inside the cavity with the surface of the micro-surface, and the thickness measuring work of the micro-surface can not generate deviation due to the fact that the drilled position of the testing rod reaches the soil by using the structure, so that the thickness measuring work has stronger rigidness, the measuring result is more accurate and fine.

4. The cleaning opening and the sealing cover are arranged, after a worker finishes the thickness test of one micro-surface, the worker can pinch the upper ends of the two clamping plates along the top surface of the sealing cover to enable the clamping plates not to be clamped with the clamping grooves, the sealing cover which is not limited can be pulled out of the cleaning opening, and then the worker can pour water into the cavity through the cleaning opening to clean the residual soil in the chute on the inner wall of the cavity, so that the influence on the next measurement work is avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the edge plate of the present invention;

FIG. 3 is a schematic view of the structure of the test bar and the support plate of the present invention;

FIG. 4 is an exploded view of the test bar of the present invention;

FIG. 5 is a schematic cross-sectional view of a test bar according to the present invention;

fig. 6 is a schematic cross-sectional view of the closure of the present invention.

The reference numbers in the figures illustrate: 1. a base; 2. a support plate; 3. a support plate; 4. a side plate; 5. a foot groove; 6. pressing a plate; 7. a traveler; 8. a column groove; 9. compressing the spring A; 10. a through groove; 11. a non-slip mat; 12. a compression spring B; 13. a threaded seat; 14. rotating the ring; 15. a ring groove; 16. a servo motor; 17. a gear; 18. a tooth post; 19. a test rod; 20. an external thread; 21. positioning holes; 22. a limiting ring; 23. a drill bit; 24. a limiting groove; 25. a cutter head; 26. a base shaft; 27. an extension pole; 28. a limiting block; 29. a vertical slot; 30. a cavity; 31. a glass plate; 32. a chute; 33. cleaning the opening; 34. sealing the cover; 35. a plate groove; 36. clamping a plate; 37. a compression spring C; 38. a clamping groove.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-6, the present invention provides a technical solution:

a device for measuring paving thickness of a micro meter for highway engineering comprises a base 1, a supporting plate 2 is arranged above the base 1, two support plates 3 are fixed between the front and rear outer walls of the supporting plate 2 and the front and rear ends of the top surface of the base 1 in a symmetrical structure, two side plates 4 are symmetrically fixed on two sides of the base 1, foot grooves 5 are formed in the top surfaces of the side plates 4, a pressing plate 6 is arranged on the upper portions of the foot grooves 5, a plurality of sliding columns 7 are symmetrically fixed on the bottom surfaces of the pressing plate 6 in a linear equidistant manner, column grooves 8 are formed in the positions, corresponding to the sliding columns 7, of the bottom surfaces of the foot grooves 5, compression springs A9 are sleeved outside the sliding columns 7, a plurality of penetrating grooves 10 are formed in the linear equidistant manner in the bottom surfaces of the foot grooves 5, non-slip mats 11 are arranged at the lower ends of the penetrating grooves 10, compression springs B12 are fixed between the top surfaces of the non-slip mats 11 and the bottom surfaces of the pressing plates 6, a servo motor 16 is fixedly arranged at the position of the top surface of the supporting plate 2 corresponding to the rear side of the threaded seat 13, the output end of the servo motor 16 penetrates through the top surface of the supporting plate 2 and extends to the lower part of the supporting plate and is coaxially and fixedly connected with a gear 17, a plurality of tooth columns 18 are fixedly arranged at equal intervals in an annular shape at the lower end of the outer wall of the threaded seat 13 corresponding to the position of the gear 17, a test rod 19 is inserted in the threaded seat 13, external threads 20 are arranged on the outer circumferential wall of the test rod 19, a positioning hole 21 is arranged at the position of the top surface of the base 1 corresponding to the test rod 19, the test rod 19 sequentially penetrates through the interior of the threaded seat 13 and the positioning hole 21 and extends to the lower part of the threaded seat and is sleeved with a limiting ring 22, a drill bit 23 is sleeved at the lower end of the exterior of the test rod 19, a limiting groove 24 is arranged at, 2 top surface left sides of backup pad have set firmly stopper 28, 19 left walls of test bar have seted up perpendicular groove 29 for the position of stopper 28 tip, cavity 30 has been seted up at 19 bottom surface middle parts of test bar, cavity 30 right wall inlays and is equipped with glass board 31, cavity 30 inner wall is linear equidistant a plurality of chutes 32 of having seted up, 19 top surface middle parts of test bar are coaxial to have seted up clearance mouth 33, the inside closing cap 34 that is equipped with of clearance mouth 33, two board grooves 35 have been seted up to bilateral symmetry around the closing cap 34, board groove 35 inside outside end is equipped with cardboard 36, compression spring C37 has set firmly between 36 inside walls of cardboard and the board groove 35 inside wall, draw-in groove 38 has been seted up for the position of 36 outside ends of cardboard to clearance mouth.

Specifically, the support plate 3 is an inclined structure with a higher inner side end and a lower outer side end, the foot groove 5 and the press plate 6 are both structures similar to the shape of a human sole, the outer wall of the press plate 6 is in sliding contact with the inner wall of the foot groove 5, the sliding column 7 is in sliding fit with the column groove 8, the non-slip mat 11 is in sliding fit with the through groove 10, a worker can place the device at any position on the surface of a micro-meter to be measured, before the worker breaks the micro-meter to measure the thickness by using the device, the sole can be prevented on the press plate 6 along the positions of the two foot grooves 5, the press plate 6 can press the sliding column 7 into the column groove 8 under the press of the weight of the worker, the compression spring B12 is shortened, the resilience force generated by the contraction of the compression spring B12 can only be released downwards due to the press of the press plate 6 by the worker, the bottom surface of the non-slip mat 11 is also attached to the ground, and the non-slip mat 11 can be more compact with the ground under the top power of, by utilizing the structure, the device can not be tilted due to the reaction force of the ground under the pressing of the weight of the working personnel, and the antiskid mat 11 can also avoid the sideslip.

Furthermore, the screw seat 13 and the rotary ring 14 are both in running fit with the annular groove 15, the lower end of the screw seat 13 penetrates through the annular groove 15 and extends to the lower part, the gear 17 is meshed with the tooth column 18, and a worker can drive the gear 17 by using the servo motor 16 and then drive the screw seat 13 to rotate by using the tooth column 18.

Further, external screw thread 20 and screw thread seat 13 threaded connection, drill bit 23 is the ring annular structure, spacing ring 22 and spacing groove 24 normal running fit, tool bit 25 is the downward triangle-shaped structure of tip, extension rod 27 lower extreme and drill bit 23 top surface are connected fixedly, base rod 26 is the arc structure with extension rod 27, extension rod 27 and the inside sliding fit of base rod 26, can drive drill bit 23 with extension rod 27 through the base rod 26 of both sides and rotate at screw thread seat 13's rotation in-process, then make a plurality of tool bits 25 of drill bit 23 bottom surface also do the circular motion, with this alright make the surface of breaking little table department that this device can relax more deepen wherein.

Furthermore, the limiting block 28 is of an L-shaped structure, the end of the limiting block 28 is in sliding fit with the vertical groove 29, the inclined groove 32 is of an inclined structure with a high inner side end and a low outer side end, the external thread 20 is in threaded connection with the threaded seat 13, and the outer wall of the testing rod 19 is further provided with the vertical groove 29 in sliding fit with the limiting block 28, so that the testing rod 19 can drill towards the deep position of the micro-meter along the drill bit 23 by performing vertical downward linear motion inside the threaded seat 13 under the structure, the testing rod 19 can be more quickly inserted into the micro-meter by using the structural design, the thickness data of the micro-meter can be more quickly obtained while saving time and labor, because the external thread 20 is in threaded connection with the threaded seat 13, and the outer wall of the testing rod 19 is further provided with the vertical groove 29 in sliding fit with the limiting block 28, the testing rod 19 can drill towards the deep position of the micro-meter along the vertical downward linear motion inside the threaded seat 13 under the structure, by utilizing the structural design, the test rod 19 can be more quickly inserted into the micro-meter, so that the thickness data of the micro-meter can be more quickly obtained while time and labor are saved.

It is worth introducing that, closing cap 34 and clearance mouth 33 are T type structure, closing cap 34 and clearance mouth 33 grafting cooperation, board groove 35 and cardboard 36 are L type structure, cardboard 36 outside end passes board groove 35 open end and extends to the outside and with draw-in groove 38 joint cooperation, in screw thread seat 13 pivoted simultaneously, the staff is after the micro-table of the department of treatment thickness test finishes, can pinch the upper end of two cardboard 36 along closing cap 34 top surface and make cardboard 36 no longer with draw-in groove 38 joint, the closing cap 34 that loses the restriction alright be pulled out clearance mouth 33, then the staff alright through clearance mouth 33 department to empty cavity 30 inside water clean the remaining soil in cavity 30 inner wall chute 32, avoid producing the influence to next measuring work.

The working principle is as follows: the working personnel can place the device at the random position of the surface of the micro-meter to be measured, before the working personnel uses the device to break the micro-meter to measure the thickness, the working personnel can place the soles of the feet on the pressing plate 6 along the positions of the two foot grooves 5, then the pressing plate 6 presses the sliding column 7 into the column groove 8 under the pressing of the weight of the working personnel, the compression spring B12 is shortened, the rebound force generated by the contraction of the compression spring B12 can only be released downwards under the pressing of the working personnel on the pressing plate 6, the bottom surface of the non-slip mat 11 is also attached to the ground, so the non-slip mat 11 can be more closely attached to the ground under the jacking force of the compression spring B12, the structure can ensure that the device can not be tilted up under the pressing of the weight of the working personnel due to the reaction force of the ground, the non-slip mat 11 can also avoid the side slipping, and the test rod 19 can be more easily inserted into the interior of the micro-meter to measure, the operation of the device is more stable and reliable, and the operation of the worker is more convenient, after the fixation is finished, the worker can utilize the servo motor 16 to drive the gear 17 to drive the screw thread seat 13 to rotate through the tooth column 18, the drill bit 23 is driven to rotate through the base rod 26 and the extension rod 27 on the two sides in the rotating process of the screw thread seat 13, and then the plurality of cutter heads 25 on the bottom surface of the drill bit 23 also do circular motion, so that the device can more easily break the surface of the micro-meter part deep into the micro-meter part, meanwhile, because the external thread 20 is connected with the screw thread of the screw thread seat 13, and the outer wall of the testing rod 19 is also provided with the vertical groove 29 in sliding fit with the limiting block 28, the testing rod 19 does vertical downward linear motion along the inside of the screw thread seat 13 and props against the drill bit 23 to drill to the deep position of the micro-meter part, the testing rod 19 can be more quickly inserted into the micro-meter, the thickness data of the micro-meter position can be obtained more rapidly while time and labor are saved, the practicability is strong, because the testing rod 19 does not rotate synchronously with the threaded seat 13 under the limitation of the threaded seat 13 and the limiting block 28, so that the direction of the glass plate 31 always faces to the right side, a worker can observe the inside of the cavity 30 through the glass plate 31 more conveniently, the worker can make the servo motor 16 reverse to lift the drill rod after driving the testing rod 19 to drill into a deeper length by using the servo motor 16, the inclined groove 32 arranged on the inner wall of the cavity 30 can bring out soil at the lower part of the micro-meter position, the worker can calculate the thickness of the micro-meter position only by observing the inclined groove 32 position where the soil is reserved and comparing with the relative position inside the cavity 30 where the surface of the micro-meter position is observed previously, the thickness measuring work of the micro-meter position can not generate deviation because the position where the testing rod 19 drills into the soil, make thickness measurement work have stronger rigor nature, make the more accurate meticulous of testing result, the staff is after finishing the thickness test to the little table department of a department, can pinch the upper end of two cardboard 36 along closing cap 34 top surface and make cardboard 36 no longer with draw-in groove 38 joint, the closing cap 34 that loses the restriction alright be extracted clearance mouth 33, then the staff alright through clearance mouth 33 department to cavity 30 inside pour into water clean cavity 30 inner wall chute 32 in remaining soil, avoid producing the influence to next measurement work.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a highway engineering is with survey micro-table department device that paves, includes base (1), its characterized in that: the sliding column type sliding support is characterized in that a supporting plate (2) is arranged above the base (1), two supporting plates (3) are fixedly arranged between the front outer wall and the rear outer wall of the supporting plate (2) and the front end and the rear end of the top surface of the base (1) in a symmetrical structure, two side plates (4) are symmetrically and fixedly arranged on two sides of the base (1), a foot groove (5) is formed in the top surface of each side plate (4), a pressing plate (6) is arranged on the upper portion of each foot groove (5), a plurality of sliding columns (7) are linearly and equidistantly symmetrically arranged on the bottom surface of each pressing plate (6), a column groove (8) is formed in the position, corresponding to each sliding column (7), of the bottom surface of each foot groove (5), a compression spring A (9) is sleeved outside each sliding column (7), a plurality of penetrating grooves (10) are linearly and equidistantly formed in the bottom surface of each foot groove (5), an anti-skid pad (, foot groove (5) and clamp plate (6) are the structure of similar human sole shape, clamp plate (6) outer wall and foot groove (5) inner wall sliding contact, traveller (7) and post groove (8) sliding fit, slipmat (11) and run through groove (10) sliding fit, compression spring B (12) have set firmly between slipmat (11) top surface and clamp plate (6) bottom surface, backup pad (2) top surface middle part is equipped with screw thread seat (13), screw thread seat (13) outer wall middle part cover is equipped with swivel (14), annular (15) have been seted up for the position of screw thread seat (13) and swivel (14) in backup pad (2) middle part, backup pad (2) top surface has set firmly servo motor (16) for the position of screw thread seat (13) rear side, servo motor (16) output runs through backup pad (2) top surface and extends to lower part and coaxial fixedly connected with gear (17), the lower end of the outer wall of the threaded seat (13) is fixedly provided with a plurality of tooth columns (18) at equal intervals in an annular shape relative to the position of the gear (17), the threaded seat (13) and the rotating ring (14) are in rotating fit with the annular groove (15), the lower end of the threaded seat (13) penetrates through the annular groove (15) and extends to the lower part, and the gear (17) is meshed with the tooth columns (18);

the testing device is characterized in that a testing rod (19) is inserted into the threaded seat (13), external threads (20) are formed in the outer wall of the circumference of the testing rod (19), a positioning hole (21) is formed in the top surface of the base (1) relative to the testing rod (19), the testing rod (19) sequentially penetrates through the interior of the threaded seat (13) and the positioning hole (21) to extend to the lower portion and is sleeved with a limiting ring (22), a drill bit (23) is sleeved at the lower end of the exterior of the testing rod (19), a limiting groove (24) is formed in the inner wall of the drill bit (23) relative to the position of the limiting ring (22), a plurality of cutter heads (25) are fixedly arranged on the bottom surface of the drill bit (23) at equal intervals in an annular mode, the cutter heads (25) are of a triangular structure with downward pointed ends, two base rods (26) are symmetrically and fixedly arranged on two sides, the left side of the top surface of the supporting plate (2) is fixedly provided with a limiting block (28), the left wall of the testing rod (19) is provided with a vertical groove (29) relative to the position of the end part of the limiting block (28), the middle part of the bottom surface of the testing rod (19) is provided with a cavity (30), the right wall of the cavity (30) is embedded with a glass plate (31), the inner wall of the cavity (30) is provided with a plurality of inclined grooves (32) at equal intervals linearly, the middle part of the top surface of the testing rod (19) is coaxially provided with a cleaning port (33), a sealing cover (34) is arranged inside the cleaning port (33), the front side and the rear side of the sealing cover (34) are symmetrically provided with two plate grooves (35), the outer side end inside the plate groove (35) is provided with a clamping plate (36), a compression spring C (37) is fixedly arranged between the inner side wall of the clamping plate (36) and the inner side wall of, the sealing cover (34) and the cleaning opening (33) are both T-shaped structures, the sealing cover (34) is in plug-in fit with the cleaning opening (33), the plate groove (35) and the clamping plate (36) are both L-shaped structures, and the outer side end of the clamping plate (36) penetrates through the opening end of the plate groove (35) to extend to the outside and be in clamping fit with the clamping groove (38).

2. The device for determining the paving thickness at the micro-surface for the road engineering as claimed in claim 1, wherein: external screw thread (20) and screw thread seat (13) threaded connection, drill bit (23) are the ring form structure, spacing ring (22) and spacing groove (24) normal running fit, extension rod (27) lower extreme is connected fixedly with drill bit (23) top surface, base pole (26) and extension rod (27) are the arc structure, extension rod (27) and base pole (26) inside sliding fit.

3. The device for determining the paving thickness at the micro-surface for the road engineering as claimed in claim 1, wherein: stopper (28) are L type structure, stopper (28) tip and perpendicular groove (29) sliding fit, chute (32) are the slope structure that the high outside end of medial extremity is low.