Photoelectric roadbed settlement monitoring device

Abstract

The invention relates to a photoelectric roadbed settlement monitoring device. In the device, a movable stand column assembly and a fixed stand column assembly are both of a double-layer structure and are vertically and mutually inserted, and an annular light source groove is formed between the movable stand column assembly and the fixed stand column assembly; the ground bottom plate is located at the top of the movable stand column assembly and moves synchronously with the movable stand column assembly. The settlement bottom plate is located at the bottom of the fixed stand column assembly and moves synchronously with the fixed stand column assembly. The reflective photoelectric sensor is located at the top of the light source groove and moves synchronously with the movable stand column assembly. The reflector is located at the bottom of the light source groove and moves synchronously with the fixed stand column assembly. The reflective photoelectric sensor emits light rays downwards at regular time, the light rays are reflected upwards by the reflector and then are received by the reflective photoelectric sensor, and roadbed settlement monitoring is carried out according to the time change of the light rays from emission to receiving. The subgrade settlement condition is monitored in real time, signals are automatically monitored and uploaded, settlement monitoring is more sensitive, and obtained data are more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed monitoring, and in particular to a photoelectric roadbed settlement monitoring device. Background Art

[0002] In the construction of railways or highways on soft soil roadbed, the roadbed settlement problem is particularly prominent due to the low strength, small bearing capacity, high compressibility, low permeability and long duration of consolidation deformation of the soft soil roadbed. The settlement monitoring of the soft soil roadbed is essential. The main purpose of monitoring the settlement of the soft soil roadbed is to monitor the stability of the roadbed during the filling construction process on the one hand, and to ensure that the post-construction settlement of the project meets the design requirements by analyzing the settlement monitoring data on the other hand.

[0003] The existing roadbed settlement monitoring method is generally measured manually by a level meter through a settlement plate or a monitoring column. This monitoring method requires a lot of manpower to conduct multiple monitorings at fixed times and locations to obtain results. It is inefficient and the steps are cumbersome, and the results are not accurate and reliable.

[0004] Therefore, it is necessary to propose new monitoring measures to overcome the above-mentioned defects. Summary of the invention

[0005] The purpose of the present invention is to provide a photoelectric roadbed settlement monitoring device to solve the problems of low efficiency and unreliable results in manual monitoring.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A photoelectric roadbed settlement monitoring device, the device comprising a photoelectric monitoring mechanism, the photoelectric monitoring mechanism comprising a movable column assembly, a fixed column assembly, a reflective photoelectric sensor, a reflective plate, a ground bottom plate and a settlement bottom plate;

[0008] The movable column assembly and the fixed column assembly are both double-layer structures and are plugged into each other up and down, forming an annular light source groove between the two;

[0009] The ground bottom plate is located at the top of the movable column assembly and moves synchronously with the movable column assembly, and the settlement bottom plate is located at the bottom of the fixed column assembly and moves synchronously with the fixed column assembly;

[0010] The reflective photoelectric sensor is located at the top of the light source slot and moves synchronously with the movable column assembly, and the reflector is located at the bottom of the light source slot and moves synchronously with the fixed column assembly;

[0011] The reflective photoelectric sensor periodically emits light downwards, which is reflected upwards by the reflective plate and then received by the reflective photoelectric sensor. The roadbed settlement is monitored based on the time change from the emission to the reception of the light.

[0012] Furthermore, the movable column assembly includes a cylindrical movable outer shell, a cylindrical movable inner shell and a cylindrical movable column;

[0013] The movable column is located in the movable inner shell, the movable inner shell is located in the movable outer shell, and the movable outer shell, the movable inner shell and the top of the movable column are all fixed to the bottom of the monitoring box;

[0014] The reflective photoelectric sensor is fixedly installed between the inner wall of the movable outer shell and the outer wall of the movable inner shell.

[0015] Further, the fixed column assembly includes a cylindrical fixed outer shell and a cylindrical fixed inner shell;

[0016] The inner wall of the fixed outer shell is slidably connected to the outer wall of the movable outer shell, and the outer wall of the fixed inner shell is slidably connected to the inner wall of the movable inner shell;

[0017] The reflective plate is fixedly connected to the inner wall of the fixed housing.

[0018] Furthermore, a limit spring is provided at the bottom of the movable column, and the limit spring is located at the bottom of the fixed inner shell.

[0019] Furthermore, the inner wall of the fixed shell is provided with a plurality of limit grooves, the outer wall of the movable shell is fixedly connected with a plurality of limit blocks, and the inner wall of the limit groove is slidably connected with the outer wall of the limit block.

[0020] Furthermore, the monitoring box is provided with an information transmission device, a photoelectric data analysis device, a photoelectric signal receiver and a signal amplifier;

[0021] The reflective photoelectric sensor is connected to the signal amplifier in the monitoring box, and further connected to the photoelectric signal receiver and the photoelectric data analysis device, and sends information through the information transmission device.

[0022] Furthermore, the ground bottom plate is located at the bottom of the road surface protection mechanism and is fixed to the ground surface, and the road surface protection mechanism also includes an anti-collision column, a solar panel and a power storage device;

[0023] The anti-collision column is provided with a warning light and is located at the top edge of the ground bottom plate;

[0024] The solar panel is connected to the power storage device, and both are installed on the top surface of the ground base plate.

[0025] Furthermore, an inspection cover is provided on the ground base plate at a position corresponding to the monitoring box.

[0026] Furthermore, the settlement bottom plate is located on the top of the settlement fixing mechanism, and the settlement fixing mechanism also includes expansion bolts, and the settlement bottom plate is fixed underground by the expansion bolts.

[0027] Furthermore, the outer wall of the expansion bolt is provided with a radial extrusion column.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a photoelectric roadbed settlement monitoring device and method, which emits light regularly through a reflective photoelectric sensor, which is then reflected back to the reflective photoelectric sensor by a reflective plate for signal collection, thereby achieving the purpose of real-time monitoring of roadbed settlement using the photoelectric reflection principle, automatically monitoring and uploading signals, and no need for personnel on duty, with higher monitoring efficiency, simpler operation, more sensitive settlement monitoring, and more accurate data acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the road surface protection mechanism of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the environmental protection component of the present invention;

[0034] Figure 4 This is a structural schematic diagram of the information transmission device of the present invention;

[0035] Figure 5 for Figure 4 A in the enlarged view;

[0036] Figure 6 It is a structural schematic diagram of the photoelectric monitoring mechanism of the present invention;

[0037] Figure 7 for Figure 6 The enlarged view of point B in the figure;

[0038] Figure 8 for Figure 6 The enlarged view of point C in the figure;

[0039] Fig. 9 It is a structural schematic diagram of the settlement fixing mechanism of the present invention.

[0040] The symbols in the figure are:

[0041] 1. Photoelectric monitoring mechanism; 11. Monitoring box; 12. Horizontal board; 13. Information transmission device; 14. Alarm device; 15. Photoelectric sensor assembly; 151. Photoelectric data analysis device; 152. Photoelectric signal receiver; 153. Signal amplifier; 154. Reflective photoelectric sensor; 16. Movable column assembly; 161. Movable outer shell; 162. Light source slot; 163. Movable inner shell; 164. Movable column; 165. Limit block; 17. Fixed column assembly; 171. Fixed outer shell; 172. Limit slot; 173. Fixed inner shell; 174. Limit spring; 175. Reflector;

[0042] 2. Settlement fixing mechanism; 21. Settlement bottom plate; 22. Settlement fixing screw; 23. Expansion shell; 24. Extrusion block; 25. Expansion slot; 26. Extrusion column;

[0043] 3. Road protection mechanism; 31. Anti-collision column; 32. Warning light; 33. Environmental protection component; 331. Solar panel; 332. Notch; 333. Rotating shaft; 334. Power storage device; 335. Support column; 34. Inspection cover; 35. Warning light; 36. Ground base plate; 37. Ground fixing screws. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0045] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Meanwhile, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Of course, such objects can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0048] It should also be noted that although the order of steps is mentioned in the method description, in some cases, they may be performed in an order different from that shown here, and this should not be construed as a limitation on the order of the steps.

[0049] like Figure 1-9 The present invention provides a photoelectric roadbed settlement monitoring device, which includes three components: a photoelectric monitoring mechanism 1, a settlement fixing mechanism 2, and a road surface protection mechanism 3. Among them, the road surface protection mechanism 3 is located on the surface, and the photoelectric monitoring mechanism 1 and the settlement fixing mechanism 2 are located underground. From bottom to top, they are the settlement fixing mechanism 2, the photoelectric monitoring mechanism 1, and the road surface protection mechanism 3. The photoelectric monitoring mechanism 1 is fixedly installed on the top of the settlement fixing mechanism 2, and the road surface protection mechanism 3 is fixedly installed on the top of the photoelectric monitoring mechanism 1.

[0050] The photoelectric monitoring mechanism 1 includes a movable column assembly 16, a fixed column assembly 17, a reflective photoelectric sensor 154, a reflector 175, a ground bottom plate 36 and a sinking bottom plate 21. The movable column assembly 16 and the fixed column assembly 17 are both double-layer structures and are plugged into each other up and down, forming an annular light source groove 163 between the two. The ground bottom plate 36 is located at the top of the movable column assembly 16 and moves synchronously with the movable column assembly 16, and the sinking bottom plate 21 is located at the bottom of the fixed column assembly 17 and moves synchronously with the fixed column assembly 17. The reflective photoelectric sensor 154 is located at the top of the light source groove 163 and moves synchronously with the movable column assembly 16, and the reflector 175 is located at the bottom of the light source groove 163 and moves synchronously with the fixed column assembly 17.

[0051] The reflective photoelectric sensor 154 periodically emits light downward, which is reflected upward by the reflective plate 175 and then received by the reflective photoelectric sensor 154. The roadbed settlement is monitored based on the time change from the emission to the reception of the light.

[0052] The movable column assembly 16 includes a cylindrical movable outer shell 161, a cylindrical movable inner shell 163, and a cylindrical movable column 164. The movable column 164 is located in the movable inner shell 163, and the movable inner shell 163 is located in the movable outer shell 161. The tops of the movable outer shell 161, the movable inner shell 163, and the movable column 164 are all fixed to the bottom of the monitoring box 11. The reflective photoelectric sensor 154 is fixedly installed between the inner wall of the movable outer shell 161 and the outer wall of the movable inner shell 163.

[0053] The fixed column assembly 17 includes a cylindrical fixed outer shell 171 and a cylindrical fixed inner shell 173. The inner wall of the fixed outer shell 171 is slidably connected to the outer wall of the movable outer shell 161, and the outer wall of the fixed inner shell 173 is slidably connected to the inner wall of the movable inner shell 163. The reflector 175 is fixedly connected to the inner wall of the fixed outer shell 171.

[0054] A limit spring 174 is provided at the bottom of the movable column 164, and the limit spring 174 is located at the bottom of the fixed inner shell 173, and the top of the limit spring 174 is fixedly connected to the bottom of the movable column 164. A plurality of limit grooves 172 are provided on the inner wall of the fixed outer shell 171, and a plurality of limit blocks 165 are fixedly connected to the outer wall of the movable outer shell 161, and the inner wall of the limit groove 172 is slidably connected to the outer wall of the limit block 165. The set limit grooves 172, limit blocks 165 and limit spring 174 can effectively prevent the fixed column assembly 17 from being separated from the movable column assembly 16, and avoid the light leakage of the light source slot 162 causing inaccurate monitoring information.

[0055] An information transmission device 13, a photoelectric data analysis device 151, a photoelectric signal receiver 152 and a signal amplifier 153 are provided in the monitoring box 11. The reflective photoelectric sensor 154 is connected to the signal amplifier 153 in the monitoring box 11, and then connected to the photoelectric signal receiver 152 and the photoelectric data analysis device 151, and sends information through the information transmission device 13. Specifically, the inner wall of the monitoring box 11 is fixedly connected with a horizontal plate 12, the top of the horizontal plate 12 is fixedly connected with the information transmission device 13, and an alarm device 14 is provided. The photoelectric data analysis device 151, the photoelectric signal receiver 152, the signal amplifier 153 and the reflective photoelectric sensor 154 together constitute a photoelectric sensing assembly 15. The signal is transmitted from the signal amplifier 153 to the photoelectric data analysis device 151 via the photoelectric signal receiver 152 for analysis, and the obtained analysis signal is wirelessly transmitted to the maintenance personnel by the information transmission device 13.

[0056] The ground bottom plate 36 is located at the bottom of the road surface protection mechanism 3 and is fixed to the ground surface. The road surface protection mechanism 3 also includes an anti-collision column 31, a solar panel 331 and a power storage device 334. The anti-collision column 31 is provided with a warning light 32 and is located at the edge of the top surface of the ground bottom plate 36. The solar panel 331 is connected to the power storage device 334, and both are installed on the top surface of the ground bottom plate 36. An inspection cover 34 is provided at the position of the ground bottom plate 36 corresponding to the monitoring box 11. The alarm device 14 is equipped with an alarm light 35, which extends upward from the ground bottom plate 36. When the photoelectric sensor component 15 detects that the settlement is greater than the threshold value, the signal is transmitted to the alarm device 14 by the photoelectric data analysis device 151, so that the monitoring personnel receive an alarm prompt, and the alarm light 35 lights up for easy search, thereby achieving the effect of prompting the alarm. The solar panel 331 and the power storage device 334 belong to the environmental protection component 33. The environmental protection component 33 also includes a plurality of support columns 335. The power storage device 334 and the plurality of support columns 335 are fixedly connected to the top of the ground bottom plate 36. The inner wall of the power storage device 334 is rotatably connected to the rotating shaft 333. The outer wall of the rotating shaft 333 is fixedly connected to the solar panel 331. The inner wall of the solar panel 331 is provided with a plurality of notches 332. The solar panel 331 absorbs solar energy and converts it into electric energy storage in the power storage device 334 to supply the power demand of the photoelectric monitoring mechanism 1 and the warning light 32. When maintenance is required, the solar panel 331 placed on the support column 335 is opened upward from the rotating shaft 333 to expose the maintenance cover 34 for maintenance. When it rains, the solar panel 331 can also protect the monitoring box 11 from rain. The notches 332 on the solar panel 331 can also drain rainwater, thereby achieving the effect of providing electric energy and avoiding water accumulation. The bottom of the anti-collision column 31 is threadedly connected with a ground fixing screw 37, and the outer wall of the anti-collision column 31 is fixedly connected with a plurality of warning lights 32. The ground bottom plate 36 is fixed on the ground using the ground fixing screws 37, and the anti-collision column 31 is fixed around the ground bottom plate 36 to play a role of marking protection.

[0057] The settlement bottom plate 21 is located at the top of the settlement fixing mechanism 2, and the settlement fixing mechanism 2 also includes expansion bolts, and the settlement bottom plate 21 is fixed to the ground by the expansion bolts. The outer wall of the expansion bolt is provided with a radial extrusion column 26. The inner wall of the settlement bottom plate 21 is threadedly connected with a plurality of settlement fixing screws 22, and the settlement fixing mechanism 2 includes a plurality of expansion shells 23, the inner wall of the expansion shell 23 is threadedly connected with the outer wall of the settlement fixing screw 22, the inner wall of the expansion shell 23 is provided with a plurality of expansion grooves 25, and the outer wall of the expansion shell 23 is fixedly connected with a plurality of extrusion blocks 24 and a plurality of extrusion columns 26. The expansion shell 23 with a plurality of extrusion blocks 24 and a plurality of extrusion columns 26 fixed on the surface is embedded in the ground, and the settlement bottom plate 21 is fixed on the plurality of expansion shells 23 using a plurality of settlement fixing screws 22, and the settlement fixing screws 22 rotate to extrude the expansion shell 23, and the expansion groove 25 is broken, and the plurality of extrusion blocks 24 and the plurality of extrusion columns 26 are squeezed and embedded in the soil, thereby achieving the effect of fixing the settlement bottom plate 21.

[0058] When the roadbed settles, the soil will press down the settlement bottom plate 21, so that the settlement bottom plate 21 drives the fixed column assembly 17 to slide down in the movable column assembly 16. When the fixed column assembly 17 and the movable column assembly 16 slide, the light source groove 162 expands, that is, the height increases, that is, the distance between the reflective photoelectric sensor 154 and the reflector 175 increases. At this time, the reflective photoelectric sensor 154 emits light, and the time required for the light to reach the reflective plate 175 and be bounced back and return to the reflective photoelectric sensor 154 increases. According to the fact that distance is equal to the product of speed and time, it can be known that after geological settlement occurs, the light source groove 162 expands, and the distance between the reflective photoelectric sensor 154 and the reflective plate 175 increases, that is, the distance required for light transmission increases. At this time, the time required for the reflective photoelectric sensor 154 to emit light and receive light increases. The distance of geological settlement is calculated based on the increased time and the speed of light.

[0059] During operation, a hole is first opened on the road base surface to be monitored, and multiple expansion holes are punched on the surface of the hole. The expansion shell 23 with multiple extrusion blocks 24 and multiple extrusion columns 26 fixed on the surface is embedded in the ground. The settlement bottom plate 21 is fixed on the multiple expansion shells 23 using multiple settlement fixing screws 22. The settlement fixing screws 22 rotate to squeeze the expansion shell 23, and the expansion groove 25 is broken, and the multiple extrusion blocks 24 and multiple extrusion columns 26 are squeezed and embedded in the soil, thereby achieving the effect of fixing the settlement bottom plate 21. After the settlement bottom plate 21 is placed in the hole, the soil is filled and compacted around the periphery of the photoelectric monitoring mechanism 1, and only the inspection cover 34 is left. Place it on the ground, use the ground fixing screws 37 to fix the ground bottom plate 36 on the ground, fix the anti-collision column 31 around the ground bottom plate 36 to play the role of marking protection, and then start the photoelectric monitoring mechanism 1 to carry out monitoring; during monitoring, the reflective photoelectric sensor 154 emits light at a fixed time, which is reflected back to the reflective photoelectric sensor 154 by the reflective plate 175 to collect signals, and the signals are transmitted from the signal amplifier 153 to the photoelectric data analysis device 151 through the photoelectric signal receiver 152 for analysis, and the obtained analysis signal is wirelessly transmitted to the maintenance personnel by the information transmission device 13; When the roadbed settles, the soil will press down the settlement bottom plate 21, so that the settlement bottom plate 21 drives the fixed component 17 to slide down in the movable component 16. When the fixed component 17 and the movable component 16 slide, the light source slot 162 expands, and the time of light reflection recovery changes, so that the settlement amplitude of the roadbed can be monitored. The fixed component 17 and the movable component 16 can be effectively prevented from separating by the set limit slot 172, the limit block 165, and the limit spring 174. When the change in the strength of the photoelectric signal is greater than the set threshold, the signal is transmitted from the photoelectric data analysis device 151 to the alarm device 14. Thereby, the monitoring personnel receive an alarm prompt, and the alarm light 35 lights up for easy finding; this device also has an environmental protection component 33, the solar panel 331 absorbs solar energy and converts it into electrical energy storage in the power storage device 334 to supply the power requirements of the photoelectric monitoring mechanism 1 and the warning light 32, and when maintenance is required, the solar panel 331 mounted on the support column 335 is opened upward from the rotating shaft 333 to expose the inspection cover 34 for maintenance, and when it rains, the solar panel 331 can also protect the monitoring box 11 from rain, and the slot 332 on the solar panel 331 can also drain rainwater to avoid water accumulation.

[0060] The device of the present invention has the following technical advantages:

[0061] 1. The present invention uses a reflective photoelectric sensor to periodically emit light, which is reflected by a reflective plate back to the reflective photoelectric sensor for signal collection, thereby achieving real-time monitoring of roadbed settlement using the principle of photoelectric reflection. The signal is transmitted from a signal amplifier to a photoelectric data analysis device via a photoelectric signal receiver for analysis. The obtained analysis signal is wirelessly transmitted to maintenance personnel by an information transmission device. Once the roadbed settles, the signal will weaken, and the settlement amplitude of the roadbed can be analyzed by the signal strength. When the roadbed settles, the soil will press down the settlement bottom plate, causing the settlement bottom plate to drive the fixed component to slide down in the movable component. When the fixed component and the movable component slide, the light source slot expands, and the strength of the photoelectric signal changes, thereby monitoring the settlement amplitude of the roadbed.

[0062] 2. The present invention connects the alarm device with the photoelectric data analysis device, so that when the settlement amplitude is too large or other accidents occur, the alarm device will sound an alarm and light up the alarm light to eliminate the fault in time. When the change in the strength of the photoelectric signal is greater than the set threshold, the signal is transmitted from the photoelectric data analysis device to the alarm device, so that the monitoring personnel receive the alarm prompt, and the alarm light is on for easy search.

[0063] 3. The present invention effectively saves energy and avoids the trouble of pulling and connecting lines by setting environmental protection components. The solar panels absorb solar energy and convert it into electrical energy storage in the power storage device to supply the power requirements of the photoelectric monitoring mechanism and the warning light. When maintenance is needed, the solar panels mounted on the support columns are opened upward from the rotating shaft to expose the maintenance cover for maintenance. When it rains, the solar panels can also protect the monitoring box from rain, and the grooves on the solar panels can also drain rainwater to avoid water accumulation.

[0064] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. Photoelectric roadbed settlement monitoring device, characterized by: The device comprises a photoelectric monitoring mechanism (1), wherein the photoelectric monitoring mechanism (1) comprises a movable column assembly (16), a fixed column assembly (17), a reflective photoelectric sensor (154), a reflective plate (175), a ground bottom plate (36) and a sinking bottom plate (21); The movable column assembly (16) and the fixed column assembly (17) are both double-layer structures and are plugged into each other up and down, forming an annular light source groove (163) between the two. The ground bottom plate (36) is located at the top of the movable column assembly (16) and moves synchronously with the movable column assembly (16), and the settlement bottom plate (21) is located at the bottom of the fixed column assembly (17) and moves synchronously with the fixed column assembly (17); The reflective photoelectric sensor (154) is located at the top of the light source slot (163) and moves synchronously with the movable column assembly (16), and the reflective plate (175) is located at the bottom of the light source slot (163) and moves synchronously with the fixed column assembly (17); The reflective photoelectric sensor (154) periodically emits light downwards, which is reflected upwards by the reflective plate (175) and then received by the reflective photoelectric sensor (154). The roadbed settlement is monitored based on the time change from the emission to the reception of the light.

2. The photoelectric roadbed settlement monitoring device according to claim 1 is characterized in that: The movable column assembly (16) comprises a cylindrical movable outer shell (161), a cylindrical movable inner shell (163) and a cylindrical movable column (164); The movable column (164) is located in the movable inner shell (163), the movable inner shell (163) is located in the movable outer shell (161), and the tops of the movable outer shell (161), the movable inner shell (163) and the movable column (164) are all fixed to the bottom of the monitoring box (11); The reflective photoelectric sensor (154) is fixedly installed between the inner wall of the movable outer shell (161) and the outer wall of the movable inner shell (163).

3. The photoelectric roadbed settlement monitoring device according to claim 2 is characterized in that: The fixed column assembly (17) comprises a cylindrical fixed outer shell (171) and a cylindrical fixed inner shell (173); The inner wall of the fixed outer shell (171) is slidably connected to the outer wall of the movable outer shell (161), and the outer wall of the fixed inner shell (173) is slidably connected to the inner wall of the movable inner shell (163); The reflective plate (175) is fixedly connected to the inner wall of the fixed housing (171).

4. The photoelectric roadbed settlement monitoring device according to claim 3 is characterized in that: A limit spring (174) is provided at the bottom of the movable column (164), and the limit spring (174) is located at the bottom of the fixed inner shell (173).

5. The photoelectric roadbed settlement monitoring device according to claim 4 is characterized in that: The inner wall of the fixed shell (171) is provided with a plurality of limit grooves (172), the outer wall of the movable shell (161) is fixedly connected with a plurality of limit blocks (165), and the inner wall of the limit groove (172) is slidably connected with the outer wall of the limit block (165).

6. The photoelectric roadbed settlement monitoring device according to claim 5 is characterized in that: The monitoring box (11) is provided with an information transmission device (13), a photoelectric data analysis device (151), a photoelectric signal receiver (152) and a signal amplifier (153); The reflective photoelectric sensor (154) is connected to the signal amplifier (153) in the monitoring box (11), and further connected to the photoelectric signal receiver (152) and the photoelectric data analysis device (151), and sends information through the information transmission device (13).

7. The photoelectric roadbed settlement monitoring device according to claim 6 is characterized in that: The ground bottom plate (36) is located at the bottom of the road surface protection mechanism (3) and is fixed to the ground surface. The road surface protection mechanism (3) also includes an anti-collision column (31), a solar panel (331) and an electricity storage device (334); The anti-collision column (31) is provided with a warning light (32) and is located at the top edge of the ground bottom plate (36); The solar panel (331) is connected to the power storage device (334), and both are installed on the top surface of the ground base plate (36).

8. The photoelectric roadbed settlement monitoring device according to claim 7 is characterized in that: The ground bottom plate (36) is provided with an inspection cover (34) at a position corresponding to the monitoring box (11).

9. The photoelectric roadbed settlement monitoring device according to claim 8, characterized in that: The settlement bottom plate (21) is located on the top of the settlement fixing mechanism (2), and the settlement fixing mechanism (2) further comprises expansion bolts, and the settlement bottom plate (21) is fixed underground by the expansion bolts.

10. The photoelectric roadbed settlement monitoring device according to claim 9, characterized in that: The outer wall of the expansion bolt is provided with a radial extrusion column (26).

Images