A road deformation monitoring device

Abstract

This invention provides a road deformation monitoring device, comprising: monitoring sleeves, the bottoms of which are fixed to the road surface structure by fasteners, and the tops of which are each provided with a cover; monitoring rods, the lower ends of which are anchored in the foundation, and the upper ends of which are respectively disposed within the two monitoring sleeves, and the tops of which are each equipped with a measuring device; a connecting part, which is installed on the outside of the monitoring sleeves for connecting the two monitoring sleeves; and two limiting parts, which are respectively installed within the two monitoring sleeves. This road deformation monitoring device obtains differential settlement by measuring the liquid level difference within the two monitoring sleeves using a comparison device. Combined with the fixing of the monitoring sleeves to the road surface and the anchoring of the monitoring rods to the foundation, it facilitates simultaneous monitoring of absolute settlement, differential settlement, and horizontal displacement of the road surface using a deep foundation as a reference, while ensuring the accuracy of the monitoring data.

Description

Technical Field

[0001] This invention relates to the field of road monitoring technology, and more specifically, to a road deformation monitoring device. Background Technology

[0002] During long-term operation, roads experience pavement settlement, differential settlement, and horizontal displacement due to factors such as uneven foundation settlement, soft soil creep, groundwater changes, and disturbance from surrounding construction. If these deformations exceed allowable limits, they can lead to decreased pavement smoothness, bridge approach slab settlement, and even pavement structural damage, severely impacting driving safety. Therefore, long-term, continuous, and high-precision monitoring of road deformation is a crucial aspect of road engineering operation and maintenance management.

[0003] Existing road deformation monitoring devices are mainly divided into two categories: One type is a settlement monitoring system based on fixed leveling points or static level instruments. By setting up several monitoring points on the road surface and performing leveling measurements with a stationary reference point, the vertical settlement of each point can be obtained. Although this type of system can measure the vertical settlement difference relatively accurately, it cannot know the relative tilt or horizontal displacement between the foundation and the road surface. Moreover, during installation, it is usually required that the monitoring rod or measuring point be completely rigidly connected to the road surface, which may cause the measuring point to be forcibly dragged when the road structure deforms, resulting in additional stress or measurement distortion. Another type is the foundation deformation monitoring device based on borehole inclinometers or displacement gauges. The measuring rod is anchored deep in the foundation, with the upper end of the rod passing through the road structure and extending freely. This type of device can measure the deep horizontal displacement or tilt of the foundation. However, the contact between the measuring rod and the road surface is usually unrestrained or completely rigid. The former is prone to eccentricity or jamming of the measuring rod due to road settlement, while the latter will forcibly transmit the road deformation to the measuring rod, interfering with the measurement of the foundation deformation itself. In addition, the existing anchoring methods of the lower end of the monitoring rod have obvious defects. Mechanically openable anchor heads are fixed only by radial pressure and are prone to overall movement in soft soil. Grouting anchor heads are not recyclable and have complicated procedures. Spiral anchor heads have limited pull-out resistance. Existing anchoring mechanisms cannot provide reliable bidirectional anchoring in soft soil, resulting in an unstable reference position of the monitoring rod and affecting the accuracy of the monitoring data. Summary of the Invention

[0004] The purpose of this invention is to provide a road deformation monitoring device to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides a road deformation monitoring device, comprising: a monitoring sleeve, the bottom of two monitoring sleeves being fixed to the road surface structure by fasteners, and a cover being provided on the top of each of the two monitoring sleeves; The monitoring rods are anchored at their lower ends in the foundation and at their upper ends in the two monitoring sleeves respectively. A measuring device is installed on the top of each of the two monitoring rods. A connecting part is installed on the outside of the monitoring sleeve and is used to connect two monitoring sleeves; The two limiting parts are respectively installed inside the two monitoring sleeves and connected to the two monitoring rods respectively, for providing flexible horizontal constraint on the upper end of the monitoring rods; The comparison device is installed in the connecting part and the two monitoring sleeves, and includes two connecting boxes respectively fixed on the inner walls of the two monitoring sleeves, a transition tube disposed in the connecting part, the lower end of which is connected to both ends of the transition tube through threaded joints, and two corrugated pipes respectively connected to the two connecting boxes at their upper ends, which are respectively installed on the top of the two connecting boxes and extend to two liquid level sensors inside the two connecting boxes.

[0006] Furthermore, the monitoring rod includes an inner support rod, a spiral anchor head fixed to the bottom of the inner support rod and anchored in the foundation, a central control tube slidably installed outside the inner support rod, an outer anchor sleeve slidably installed outside the central control tube, a plurality of upper locking rods in a ring array hinged to the bottom of the outer anchor sleeve, and a plurality of lower locking rods in a ring array hinged to the bottom of the central control tube, with their other ends respectively hinged to the plurality of upper locking rods; The inner support rod, the middle control tube, and the outer anchor sleeve are all provided with locking grooves, and transverse locking bolts are movably installed in several of the locking grooves. When the central control tube is pulled and moved upward relative to the outer anchor sleeve, the upper locking rods and the lower locking rods are in an extended state, and when the spiral anchor head is anchored in the foundation, the locking grooves overlap.

[0007] Furthermore, the limiting part includes a plurality of fixing ears fixed in a ring array at the upper end of the central control tube, and a plurality of connecting ropes fixed in a ring array inside the monitoring sleeve. The connecting ropes are all inclined, and the upward inclined ends of the connecting ropes are respectively connected to the fixing ears via hooks.

[0008] Furthermore, the connecting part includes several movable sleeves that are slidably installed on the outside of the two monitoring sleeves, several rubber sleeves that are disposed between the several movable sleeves and the two monitoring sleeves, several fixed sleeves that are symmetrically fixed at both ends of the several movable sleeves, a horizontal bar that is disposed between the two monitoring sleeves and fixed to the several fixed sleeves by bolts, and two reserved grooves that are respectively opened on the two monitoring sleeves and allow the two ends of the transition tube to move. The transition tube is installed inside the crossbar.

[0009] Furthermore, the tops of both of the connecting boxes are connected to air distribution pipes, and filter caps are threaded onto both air distribution pipes.

[0010] Furthermore, each of the two monitoring sleeves is fixedly connected with a vent pipe, and each of the two monitoring sleeves is fixedly connected with a drying tank at the upper end of its inner wall. The lower ends of the two vent pipes extend to the lower outside of the two monitoring sleeves, and the upper ends of the two vent pipes are connected to the bottom of the two drying tanks. A filter plate is installed at the bottom of the drying tank, and the drying tank is filled with silica gel or molecular sieve.

[0011] Furthermore, the interior of each of the two covers is provided with a sealing ring that abuts against the top of the two monitoring sleeves. Both sides of the two covers are symmetrically threaded with positioning bolts. The upper end of each of the two monitoring sleeves is provided with a positioning groove corresponding to several positioning bolts. The bottom of each of the two monitoring sleeves is provided with a sealing gasket that abuts against the road surface structure.

[0012] Furthermore, the measuring device includes a threaded groove formed on the top of the inner support rod, an assembly table threadedly connected to the support rod above the threaded groove, an inclinometer mounted on the upper surface of the assembly table, a connecting frame fixed on the upper surface of the assembly table, and a wire-type displacement sensor mounted on the inner wall of the monitoring sleeve. The pull wire of the pull-wire displacement sensor is fixed to the connecting frame.

[0013] Furthermore, each of the two monitoring sleeves is equipped with a vibration sensor, which is fixed to the inner wall of the monitoring sleeve and used to detect road vibration signals.

[0014] Furthermore, the vibration sensor, inclinometer, wire-type displacement sensor, and liquid level sensor are all electrically connected to the external controller; When the vibration amplitude output by the vibration sensor exceeds a preset threshold, the output data of the inclinometer, the wire displacement sensor and the liquid level sensor at the corresponding time are marked as unreliable data.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This road deformation monitoring device, through its limiting part, can provide flexible horizontal constraint on the upper end of the monitoring rod, allowing the monitoring rod to deflect freely with the tilt or horizontal displacement of the foundation, without being forcibly stuck due to local deformation of the pavement structure. The inclinometer in the measuring device can directly measure the tilt angle of the monitoring rod, truly reflecting the deformation state of the foundation relative to the pavement structure, avoiding measurement distortion or additional stress caused by rigid connection. Furthermore, the monitoring rod adopts an inner support rod, a middle control tube, an outer anchoring sleeve, and deployable upper locking rods and lower locking mechanisms. While vertical anchoring is achieved through the helical anchor head, the deployed upper locking rods can form a large-scale radial anchoring, ensuring the stable connection between the lower end of the monitoring rod and the foundation, and improving the accuracy of the monitoring data. This road deformation monitoring device, through the inclusion of a comparison device, utilizes a liquid level sensor to monitor the liquid level changes within a connecting box fixed to two monitoring sleeves. It directly measures the vertical settlement difference between two fixed points on the road surface, providing independent data for cross-verification with the measurement results from the monitoring rod. Combined with the measuring device, it monitors the settlement of individual monitoring sleeves and rods, facilitating data comparison and improving the comprehensiveness and reliability of the monitoring results. Furthermore, when the liquid level sensor is installed in the connecting box, it is relatively fixed to the inner wall of the monitoring sleeve and does not contact the monitoring rod. Therefore, even if the monitoring rod tilts significantly due to foundation deformation, it will not affect the sensing of the liquid level sensor, ensuring separation of the monitoring of the relative position of the two monitoring sleeves from the settlement monitoring of the monitoring rod, thus avoiding data interference. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 A perspective view of the present invention is shown; Figure 2 A split perspective view of the connecting portion of the present invention is shown; Figure 3 A partially disassembled perspective view of the present invention is shown; Figure 4 A partial cross-sectional perspective of the present invention is shown. Figure 1 ; Figure 5 A partial cross-sectional perspective of the present invention is shown. Figure 2 ; Figure 6 A split perspective view of the comparative device of the present invention is shown; Figure 7 A split perspective view of the measuring device of the present invention is shown; Figure 8 A partial perspective view of the monitoring rod of the present invention is shown; Figure 9 A partially disassembled perspective view of the monitoring rod of the present invention is shown; Figure 10A partial perspective view of the monitoring rod of the present invention in another state is shown.

[0018] In the figure, the same reference numerals represent the same structural element, wherein: 1. Monitoring sleeve; 2. Fastener; 3. Cover; 4. Monitoring rod; 5. Measuring device; 6. Connecting part; 7. Limiting part; 8. Comparison device; 9. Communicating box; 10. Transition pipe; 11. Bellows; 12. Liquid level sensor; 13. Inner support rod; 14. Spiral anchor head; 15. Middle control pipe; 16. Outer anchoring sleeve; 17. Upper locking rod; 18. Lower locking rod; 19. Locking groove; 20. Transverse locking bolt; 21. Fixing lug; 22. 1. Connecting rope; 23. Movable sleeve; 24. Rubber sleeve; 25. Fixed sleeve; 26. Horizontal bar; 27. Reserved groove; 28. Air distribution pipe; 29. ​​Filter cover; 30. Vent pipe; 31. Drying tank; 32. Sealing ring; 33. Positioning bolt; 34. Positioning groove; 35. Sealing gasket; 36. Threaded groove; 37. Assembly table; 38. Inclinometer; 39. Connecting frame; 40. Pull-wire displacement sensor; 41. Vibration sensor; 42. Filter plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0020] like Figure 1-10 As shown, a road deformation monitoring device includes: a monitoring sleeve 1, the bottom of two monitoring sleeves 1 are fixed to the road surface structure by fasteners 2, and the top of two monitoring sleeves 1 are provided with a cover 3. The lower ends of the two monitoring rods 4 are anchored in the foundation, and the upper ends of the two monitoring rods 4 are respectively set in the two monitoring sleeves 1. A measuring device 5 is installed on the top of the two monitoring rods 4. Connecting part 6, which is installed on the outside of the monitoring sleeve 1 and is used to connect two monitoring sleeves 1; The two limiting parts 7 are respectively installed in the two monitoring sleeves 1 and respectively connected to the two monitoring rods 4, for providing flexible horizontal constraint on the upper end of the monitoring rods 4; The comparison device 8 is installed in the connecting part 6 and the two monitoring sleeves 1. It includes two connecting boxes 9 fixed on the inner walls of the two monitoring sleeves 1 respectively, a transition tube 10 disposed in the connecting part 6, two corrugated pipes 11 connected to the two ends of the transition tube 10 respectively by threaded joints at their lower ends, and connected to the two connecting boxes 9 respectively at their upper ends. The corrugated pipes 11 are respectively installed on the top of the two connecting boxes 9 and extend to the two liquid level sensors 12 inside the two connecting boxes 9. Two monitoring sleeves 1 are fixed to the road surface structure by fasteners 2 and move synchronously with the road surface. The lower ends of the two monitoring rods 4 are vertically restricted by spiral anchor heads 14 and stably anchored in the deep stable foundation by several deployable upper locking rods 17 and lower locking mechanisms, serving as a reference. The housing of the wire-type displacement sensor 40 of the measuring device 5 is fixed to the inner wall of the monitoring sleeve 1, and the outer end of the wire is fixed to the connecting frame 39 at the upper end of the monitoring rod 4. At the same time, the comparison device 8 is connected between the two monitoring sleeves 1 through a connecting box 9 and a corrugated pipe 11. The transition pipe 10 and the liquid level sensor 12 constitute a communicating vessel. Two communicating boxes 9 are respectively fixed to the inner walls of the two monitoring sleeves 1, and are connected to two corrugated pipes 11 through the transition pipe 10. The two liquid level sensors 12 respectively measure the liquid level height inside the two monitoring sleeves 1, and the change in liquid level is the differential settlement of the two monitoring sleeves 1. When the road surface settles but the foundation remains stationary, the monitoring sleeve 1 descends with the road surface, the monitoring rod 4 remains stationary, the pull wire contracts, and the output contraction amount is the absolute settlement of the road surface. When the road surface remains stationary but the foundation settles, the monitoring sleeve 1 does not... As the foundation descends, the monitoring rod 4 extends its wire, and the amount of extension is the foundation settlement. When the road surface and foundation rise and fall synchronously, the monitoring sleeve 1 moves synchronously with the monitoring rod 4. The wire length remains unchanged, and there is no output at a single point, but the comparison device 8 can reflect the difference. This difference is the overall settlement of the foundation and road surface at a single point. While reflecting the settlement data, the inclinometer 38 of the measuring device 5 is horizontally installed on the mounting platform 37 at the top of the monitoring rod 4. When the foundation undergoes horizontal displacement, the lower end of the monitoring rod 4 moves accordingly, while the upper end is constrained by the limiting part 7. The limiting part 7 provides flexible horizontal constraint, allowing the monitoring rod 4 to move freely vertically while suppressing random swinging. When the monitoring rod 4 tilts, the inclinometer 38 detects the tilt angle. Combined with the length of the monitoring rod 4, the horizontal displacement data of the foundation can be calculated. By independently obtaining the differential settlement data through the comparison device 8 and combining it with the single-point absolute settlement data, the road surface settlement, road surface rise, foundation settlement, foundation rise and differential settlement can be accurately distinguished. The monitoring is comprehensive and the detection results are accurate. As an extended implementation, the monitoring sleeve 1 can be a post of a road guardrail, and the connecting part 6 can be a crossbeam of a road guardrail. In this case, the monitoring device is integrated with the road guardrail structure, and there is no need to set up the monitoring sleeve 1 and the connecting part 6 separately, saving road shoulder space. At the same time, the existing protective function of the guardrail post is used to protect the internal monitoring elements. Specifically, the monitoring rod 4, the limiting part 7 and the measuring device 5 are installed inside the guardrail post, and the transition pipe 10 is installed inside the guardrail crossbeam. It is connected to the connecting box 9 inside the post through the corrugated pipe 11. All monitoring elements are hidden inside the guardrail. Furthermore, in this embodiment, two monitoring sleeves 1 are used as a pair to monitor the deformation of a local road surface. When it is necessary to monitor a longer road section, those skilled in the art can easily conceive of using the basic units of the two monitoring sleeves 1 in series along the road direction, that is, setting up three, four or more monitoring sleeves 1. A connecting part 6 and a comparison device 8 are set between any two adjacent monitoring sleeves 1 to effectively increase the monitoring range.

[0021] Optionally, the monitoring rod 4 includes an inner support rod 13, a spiral anchor head 14 fixed to the bottom of the inner support rod 13 and anchored in the foundation, a middle control tube 15 slidably installed outside the inner support rod 13, an outer anchor sleeve 16 slidably installed outside the middle control tube 15, a plurality of upper locking rods 17 hinged in a ring array to the bottom of the outer anchor sleeve 16, and a plurality of lower locking rods 18 hinged in a ring array to the bottom of the middle control tube 15, with the other end of each rod hinged to one of the upper locking rods 17. The inner support rod 13, the middle control tube 15 and the outer anchor sleeve 16 are all provided with locking grooves 19, and transverse locking bolts 20 are movably installed in a number of the locking grooves 19. When the middle control tube 15 is pulled and moves upward relative to the outer anchor sleeve 16, several upper locking rods 17 and several lower locking rods 18 are in an extended state, and when the spiral anchor head 14 is anchored in the foundation, several locking grooves 19 overlap. During installation, the monitoring rod 4 is first lowered into the borehole. At this time, the central control tube 15 is pulled upward, causing it to move upward relative to the outer anchor sleeve 16. This causes several lower locking rods 18 to move upward, and the lower locking rods 18 push several upper locking rods 17 to expand radially outward, clamping the borehole wall and embedding them into the foundation to form radial anchoring. Then, the inner support rod 13 is rotated to screw the spiral anchor head 14 into the soil at the bottom of the hole, forming vertical bidirectional anchoring, which effectively resists compression and pull-out, and ensures the stability of the vertical height. When the radial expansion is completed and the spiral anchor head 14 is anchored in place, the locking grooves 19 on the inner support rod 13, the central control tube 15, and the outer anchor sleeve 16 automatically overlap. Inserting the transverse locking bolt 20 locks their relative positions. The combined effect of radial expansion and bottom spiral anchoring ensures reliable anchoring, ensuring the stability of the monitoring rod 4 in the foundation and preventing loosening during long-term use. It is suitable for anchoring monitoring in various geological environments.

[0022] Optionally, the limiting part 7 includes a plurality of fixing ears 21 fixed in a ring array at the upper end of the central control tube 15, and a plurality of connecting ropes 22 fixed in a ring array inside the monitoring sleeve 1. The connecting ropes 22 are all inclined, and the upward inclined end of the connecting ropes 22 is connected to the fixing lugs 21 by hooks respectively; During use, if the monitoring rod 4 tilts due to the horizontal displacement of the foundation, the connecting rope 22 will be stretched, and the change in rope tension will be transmitted to the inclinometer 38. This will not affect the measuring device 5's monitoring of the movement of the monitoring rod 4. When there is no external force, the connecting ropes 22 can provide a certain amount of traction to the monitoring rod 4, keeping it in the center of the monitoring sleeve 1, avoiding random swinging, and ensuring stable inclination measurement. Since the connecting ropes 22 are all inclined, they will not restrict the vertical movement of the monitoring rod 4, ensuring accurate settlement measurement. Furthermore, the connecting ropes 22 are connected to the monitoring rod 4 through hooks, which facilitates quick assembly and disassembly, and makes on-site maintenance and replacement convenient.

[0023] Optionally, the connecting part 6 includes a plurality of movable sleeves 23 that are slidably installed on the outside of the two monitoring sleeves 1, a plurality of rubber sleeves 24 disposed between the plurality of movable sleeves 23 and the two monitoring sleeves 1, a plurality of fixed sleeves 25 that are symmetrically fixed at both ends of the plurality of movable sleeves 23, a crossbar 26 disposed between the two monitoring sleeves 1 and fixed to the plurality of fixed sleeves 25 by bolts, and two reserved grooves 27 that are respectively opened on the two monitoring sleeves 1 and allow the two ends of the transition tube 10 to move. The transition tube 10 is installed inside the crossbar 26; The fixed sleeve 25 is symmetrically fixed at both ends of the movable sleeve 23. The crossbar 26 is fixed to the fixed sleeve 25 by bolts. When the monitoring sleeve 1 settles with the road surface, the movable sleeve 23 and the rubber sleeve 24 can slide on the monitoring sleeve 1 to adapt to vertical displacement, reduce the deformation of the crossbar 26 when the monitoring sleeve 1 settles, and prevent the internal transition pipe 10 from deforming and becoming blocked. The elasticity of the rubber sleeve 24 can buffer the vibration generated by vehicle passage, compensate for the installation gap, reduce the interference of vehicle passage on the measurement, and also play a certain sealing role to prevent rainwater from entering the monitoring sleeve 1 through the reserved groove 27. The transition pipe 10 is installed in the crossbar 26, and its two ends are connected to the corrugated pipe 11 through the reserved groove 27. The reserved groove 27 provides the transition pipe 10 with movement space to prevent the monitoring sleeve 1 from interfering with the operation of the comparison device 8 when it moves.

[0024] Optionally, the tops of both of the connecting boxes 9 are connected to air distribution pipes 28, and filter caps 29 are threaded onto both of the air distribution pipes 28. The equalization pipe 28 is connected to the top of the connecting box 9, allowing the space inside the connecting box 9 to communicate with the outside space, maintaining air pressure balance, and ensuring that the liquid inside the connecting box 9 can flow freely. The filter cover 29 is threaded to the upper end of the equalization pipe 28 and has a filter screen inside to prevent dust, insects and other debris from entering the connecting box 9, avoiding contamination and blockage of the liquid inside the connecting box 9. When the filter cover 29 is rotated off, it is convenient to replenish the liquid through the equalization pipe 28. The liquid in the connecting box 9 can be ethylene glycol, which effectively reduces volatilization during long-term use.

[0025] Optionally, each of the two monitoring sleeves 1 is fixedly connected with a vent pipe 30, and each of the two monitoring sleeves 1 is fixedly connected with a drying tank 31 at the upper end of the inner wall. The lower ends of the two vent pipes 30 extend to the lower ends of the two monitoring sleeves 1 respectively, and the upper ends of the two vent pipes 30 are connected to the bottom of the two drying tanks 31 respectively. A filter plate 42 is installed at the bottom of the drying tank 31, and the drying tank 31 is filled with silica gel or molecular sieve. When the air pressure inside the monitoring sleeve 1 changes, air can enter and exit through the drying tank 31 and the vent pipe 30. The drying tank 31 is filled with silica gel or molecular sieve and has a filter plate 42 at the bottom. When the air enters the monitoring sleeve 1, the water vapor in it will be absorbed by the silica gel or molecular sieve desiccant, effectively reducing the influence of water vapor on the liquid level in the comparison device 8 and ensuring the accuracy of liquid level measurement. The silica gel or molecular sieve desiccant can be replaced during the maintenance of the monitoring device to ensure its effectiveness. The filter plate 42 prevents desiccant particles from entering the vent pipe 30, ensuring its practicality.

[0026] Optionally, the interior of each of the two covers 3 is provided with a sealing ring 32 that abuts against the top of the two monitoring sleeves 1. Both sides of the two covers 3 are symmetrically threaded with positioning bolts 33. The upper end of each of the two monitoring sleeves 1 is provided with a positioning groove 34 corresponding to a plurality of positioning bolts 33. The bottom of each of the two monitoring sleeves 1 is provided with a sealing gasket 35 that abuts against the road surface structure. During the assembly of the monitoring device, several positioning bolts 33 pass through both sides of the cover 3 and are screwed into several positioning grooves 34 at the upper end of the monitoring sleeve 1, effectively locking the cover 3 and preventing it from loosening. This ensures the sealing effect of the sealing ring 32 on the top of the monitoring sleeve 1, preventing rainwater from entering from the top. The sealing gasket 35 at the bottom of the monitoring sleeve 1 effectively seals the bottom of the monitoring sleeve 1 during installation, preventing rainwater or dust from entering from the bottom. This achieves multiple seals, effectively maintaining the internal environment of the monitoring sleeve 1, reducing interference from the external environment, and ensuring the stability and service life of the measuring device 5.

[0027] Optionally, the measuring device 5 includes a threaded groove 36 formed on the top of the inner support rod 13, an assembly table 37 threadedly connected to the support rod above the threaded groove 36, an inclinometer 38 mounted on the upper surface of the assembly table 37, a connecting frame 39 fixed on the upper surface of the assembly table 37, and a pull-wire displacement sensor 40 mounted on the inner wall of the monitoring sleeve 1. The pull wire of the pull-wire displacement sensor 40 is fixed to the connecting frame 39; The assembly table 37 is fixed to the top of the inner support rod 13 by the threaded groove 36, which is convenient for disassembly and assembly, thus facilitating the rapid assembly of the monitoring device during use. The inner support rod 13 is stably anchored in the deep stable foundation by the cooperation of the spiral anchor head 14, several upper locking rods 17 and several lower locking rods 18. When the deep soil undergoes horizontal displacement, the monitoring rod 4 tilts. The inclinometer 38 can detect the tilt angle and convert it into horizontal displacement by combining it with the length of the monitoring rod 4. The monitoring sleeve 1 is fixed to the road structure by fastener 2, and settles or remains stationary with the road surface. The monitoring rod 4 is fixed to the foundation, and settles or remains stationary with the foundation. The housing of the pull-wire displacement sensor 40 is fixed to the monitoring sleeve 1, and the pull wire is fixed to the monitoring rod 4, which can respond to both road surface movement and foundation movement at the same time. When the foundation is stable and the road surface settles, the monitoring sleeve 1 settles with the road surface, while the monitoring rod 4 remains stationary and the guy wire is in a contracted state. At this time, the amount of contraction is the absolute settlement data of the road surface. When the foundation settles and the road surface stabilizes, the monitoring sleeve 1 remains stationary, while the monitoring rod 4 settles with the foundation, and the guy wire is in an extended state. At this time, the amount of extension is used as the foundation settlement data. When in use, it can be combined with the comparison device 8. When the guy wires of the two monitoring sleeves 1 retract synchronously and the comparison device 8 shows no liquid level difference, it is judged that the overall foundation rises. When the guy wires of the two monitoring sleeves 1 extend synchronously and the comparison device 8 shows no liquid level difference, it is judged that the overall foundation settles. When the guy wire at a single point retracts and the comparison device 8 shows a liquid level difference, it is judged that the road surface at that point settles. When the guy wire at a single point extends and the comparison device 8 shows a liquid level difference, it is judged that the road surface at that point rises. When the guy wire at a single point does not change, but the comparison device 8 shows a liquid level difference, it is judged that the road surface and foundation at that point have settled. By comparing various data, the settlement location can be effectively distinguished, ensuring the comprehensiveness and accuracy of the monitoring data.

[0028] Optionally, each of the two monitoring sleeves 1 is provided with a vibration sensor 41, which is fixed to the inner wall of the monitoring sleeve 1 and is used to detect road vibration signals.

[0029] Optionally, the vibration sensor 41, inclinometer 38, wire-type displacement sensor 40, and liquid level sensor 12 are all electrically connected to the peripheral controller. When the vibration amplitude output by the vibration sensor 41 exceeds a preset threshold, the output data of the inclinometer 38, the wire displacement sensor 40 and the liquid level sensor 12 at the corresponding time are marked as unreliable data.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A road deformation monitoring device, characterized in that, include: The bottom of both monitoring sleeves (1) is fixed to the road structure by fasteners (2), and the top of both monitoring sleeves (1) is provided with a cover (3). The lower ends of the two monitoring rods (4) are anchored in the foundation, and the upper ends of the two monitoring rods (4) are respectively set in the two monitoring sleeves (1). The top of the two monitoring rods (4) is equipped with a measuring device (5). A connecting part (6) is installed on the outside of the monitoring sleeve (1) and is used to connect two monitoring sleeves (1). The two limiting parts (7) are respectively installed in the two monitoring sleeves (1) and respectively connected to the two monitoring rods (4) to provide flexible horizontal constraints on the upper end of the monitoring rods (4); The comparison device (8) is installed in the connection part (6) and the two monitoring sleeves (1), including two connecting boxes (9) fixed on the inner walls of the two monitoring sleeves (1) respectively, a transition tube (10) set in the connection part (6), the lower end of which is connected to both ends of the transition tube (10) through threaded joints, and the upper end of which is connected to the two connecting boxes (9) respectively, and two corrugated pipes (11) are installed on the top of the two connecting boxes (9) respectively and extend to the two liquid level sensors (12) inside the two connecting boxes (9).

2. The road deformation monitoring device as described in claim 1, characterized in that, The monitoring rod (4) includes an inner support rod (13), a spiral anchor head (14) fixed to the bottom of the inner support rod (13) and anchored in the foundation, a middle control tube (15) slidably installed outside the inner support rod (13), an outer anchor sleeve (16) slidably installed outside the middle control tube (15), a plurality of upper locking rods (17) hinged in a ring array to the bottom of the outer anchor sleeve (16), and a plurality of lower locking rods (18) hinged in a ring array to the bottom of the middle control tube (15) and whose other ends are respectively hinged to the plurality of upper locking rods (17). Locking grooves (19) are provided on the inner support rod (13), the middle control tube (15) and the outer anchor sleeve (16), and transverse locking bolts (20) are movably installed in a number of the locking grooves (19). When the middle control tube (15) is pulled to move upward relative to the outer anchor sleeve (16), several upper locking rods (17) and several lower locking rods (18) are in an unfolded state, and when the spiral anchor head (14) is anchored in the foundation, several locking grooves (19) overlap.

3. The road deformation monitoring device as described in claim 2, characterized in that, The limiting part (7) includes a plurality of fixing ears (21) fixed in a ring array at the upper end of the central control tube (15), and a plurality of connecting ropes (22) fixed in a ring array inside the monitoring sleeve (1). The connecting ropes (22) are all inclined, and the upward inclined end of the connecting ropes (22) is connected to the fixing ears (21) by hooks respectively.

4. The road deformation monitoring device as described in claim 3, characterized in that, The connecting part (6) includes several movable sleeves (23) that are slidably installed on the outside of the two monitoring sleeves (1), several rubber sleeves (24) that are disposed between the several movable sleeves (23) and the two monitoring sleeves (1), several fixed sleeves (25) that are symmetrically fixed at both ends of the several movable sleeves (23), a crossbar (26) that is disposed between the two monitoring sleeves (1) and fixed to the several fixed sleeves (25) by bolts, and two reserved grooves (27) that are respectively opened on the two monitoring sleeves (1) and allow the two ends of the transition tube (10) to move. The transition tube (10) is installed inside the crossbar (26).

5. A road deformation monitoring device as described in claim 4, characterized in that, The tops of the two connecting boxes (9) are connected to air equalization pipes (28), and filter caps (29) are threaded onto the two air equalization pipes (28).

6. The road deformation monitoring device as described in claim 5, characterized in that, A ventilation tube (30) is fixedly connected inside each of the two monitoring sleeves (1). A drying tank (31) is fixedly connected to the upper end of the inner wall of each of the two monitoring sleeves (1). The lower ends of the two ventilation tubes (30) extend to the lower outside of the two monitoring sleeves (1), and the upper ends of the two ventilation tubes (30) are connected to the bottom of the two drying tanks (31). A filter plate (42) is installed at the bottom of the drying tank (31), and the drying tank (31) is filled with silica gel or molecular sieve.

7. A road deformation monitoring device as described in claim 2, characterized in that, The interior of each of the two covers (3) is provided with a sealing ring (32) that abuts against the top of the two monitoring sleeves (1). Both sides of the two covers (3) are symmetrically threaded with positioning bolts (33). The upper end of each of the two monitoring sleeves (1) is provided with a positioning groove (34) corresponding to a number of positioning bolts (33). The bottom of each of the two monitoring sleeves (1) is provided with a sealing gasket (35) that abuts against the road surface structure.

8. A road deformation monitoring device as described in claim 7, characterized in that, The measuring device (5) includes a threaded groove (36) opened on the top of the inner support rod (13), an assembly table (37) threadedly connected to the support rod through the threaded groove (36), an inclinometer (38) mounted on the upper surface of the assembly table (37), a connecting frame (39) fixed on the upper surface of the assembly table (37), and a pull-wire displacement sensor (40) mounted on the inner wall of the monitoring sleeve (1). The pull wire of the pull-wire displacement sensor (40) is fixed to the connecting frame (39).

9. A road deformation monitoring device as described in claim 8, characterized in that, Vibration sensors (41) are provided inside both monitoring sleeves (1). The vibration sensors (41) are fixed to the inner wall of the monitoring sleeves (1) and are used to detect road vibration signals.

10. A road deformation monitoring device as described in claim 9, characterized in that, The vibration sensor (41), inclinometer (38), wire displacement sensor (40), and liquid level sensor (12) are all electrically connected to the peripheral controller; When the vibration amplitude output by the vibration sensor (41) exceeds the preset threshold, the output data of the inclinometer (38), the wire displacement sensor (40) and the liquid level sensor (12) at the corresponding time are marked as unreliable data.

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