Road settlement monitoring device

Abstract

The invention belongs to the technical field of road construction monitoring, and particularly provides a road settlement monitoring device which comprises a transverse pipe and a telescopic pipe, the telescopic pipe comprises a pipe sleeve and a fixed pipe embedded in the pipe sleeve, the lower end of the fixed pipe is connected with the transverse pipe, and the upper end of the pipe sleeve is fixed to a displacement plate; one end of the measuring rope is connected with the displacement plate, and the other end is led out from the extending end of the transverse pipe. An inner pipe is embedded in the fixed pipe, an inner transverse pipe is embedded in the transverse pipe, the fixed pipe and the inner pipe are respectively provided with a first hole, and the transverse pipe and the inner transverse pipe are respectively provided with a second hole; the supporting end of the inner transverse pipe is arranged below the inner pipe, an eccentric wheel coaxial with the inner transverse pipe is fixed to the supporting end of the inner transverse pipe, and the eccentric wheel abuts against the lower end of the inner pipe so as to support the inner pipe. In a monitoring state, the first holes of the fixed pipe and the inner pipe are not overlapped, and the second holes of the transverse pipe and the inner transverse pipe are not overlapped; in the grouting state, the second holes of the inner transverse pipe and the transverse pipe are overlapped, and the first holes of the fixing pipe and the inner pipe are overlapped.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction monitoring, and specifically provides a road settlement monitoring device. Background Art

[0002] Roads generally include a roadbed (i.e. the foundation of the road) and a pavement layer located above the roadbed. When the roadbed settles during construction, it will affect the smoothness of the entire road during construction and after completion, making it impossible for the road to provide a smooth traffic environment for vehicles. For roads that have been completed, they can be tested using precise settlement monitoring instruments, and the outside of the road needs to be coordinated with the setting of positioning reference points. However, for roads in the process of construction, the surrounding environment is complex, and various operating machinery often passes by. The above-mentioned monitoring instruments and corresponding reference points are easily damaged by mistake and lose their monitoring functions.

[0003] In the relevant technical solution, in order to realize the settlement monitoring of the road during the construction process, a vertical telescopic tube and a horizontal steel pipe are set in the roadbed of the road. The upper end of the telescopic tube is connected to a plate, and the lower end of the telescopic tube is connected to the steel pipe. A steel wire rope is connected to the plate. The steel wire rope passes downward through the telescopic tube and then extends horizontally along the steel pipe to the outside of the foundation. Finally, a measuring tunnel is set outside the foundation, and a measuring ruler and a weight block for tensioning the steel wire rope are set in the tunnel. When the foundation of the road settles, the plate moves down, the length of the steel wire rope in the telescopic tube decreases, and part of the steel wire rope is pulled down by the weight in the tunnel, and then measured by the ruler.

[0004] The inventors learned that after the road construction is completed, in order to avoid soil erosion in the foundation part caused by the existence of the transverse steel pipe, and thus avoid the problem of foundation instability and road damage caused by soil erosion: concrete slurry is generally re-injected at the steel pipe. However, the re-injected concrete slurry only exists in the inner cavity of the telescopic pipe and the steel pipe, and cannot solve the problem of easy loss of fillers such as soil at the outer wall of the steel pipe and the telescopic pipe. Summary of the invention

[0005] The object of the present invention is to provide a road subsidence monitoring device that can solve at least one of the above-mentioned technical problems.

[0006] In order to solve the above-mentioned problems in the prior art, one or more embodiments of the present invention provide a road settlement monitoring device, including a transverse tube and a vertical telescopic tube arranged in a road foundation, the two are perpendicular to each other and connected, the telescopic tube includes a vertical pipe sleeve and a fixed pipe embedded in the pipe sleeve, the lower end of the fixed pipe is supported by the transverse tube, and the upper end of the pipe sleeve is fixed to the displacement plate; one end of the transverse tube extends out of the foundation and forms an extended end; one end of the measuring rope is connected to the displacement plate, and the other end extends along the inner cavity of the telescopic tube and the transverse tube in turn, and is led out from the extended end of the transverse tube, and a tension component for connecting and tensioning the measuring rope is provided on the outside of the foundation.

[0007] An inner tube is embedded in the fixed tube, and an inner transverse tube is embedded in the transverse tube. The side walls of the fixed tube and the inner tube have first holes respectively, and the side walls of the transverse tube and the inner transverse tube have second holes respectively. One end of the inner transverse tube is a supporting end, and the supporting end is arranged below the inner tube. An eccentric wheel coaxial with itself is fixed to the supporting end of the inner transverse tube, and the eccentric wheel abuts against the lower end of the inner tube to support the inner tube. The road settlement monitoring device has a monitoring state and a grouting state. In the monitoring state: the first holes of the fixed tube and the inner tube do not overlap, and the second holes of the transverse tube and the inner transverse tube do not overlap. In the grouting state: the inner transverse tube can rotate relative to the transverse tube until the second holes of the two overlap each other, and the inner transverse tube drives the eccentric wheel to rotate to push the inner tube up and make the first holes of the fixed tube and the inner tube overlap each other.

[0008] Beneficial effects of one or more of the above technical solutions: In this solution, an inner tube is embedded in the fixed tube, an inner transverse tube is embedded in the transverse tube, the side walls of the fixed tube and the inner tube have first holes respectively, the side walls of the transverse tube and the inner transverse tube have second holes respectively, and an eccentric wheel coaxial with the inner transverse tube is fixed to the supporting end of the inner transverse tube, and the eccentric wheel stops and supports the inner tube. In the monitoring state: the first holes of the fixed tube and the inner tube do not overlap, and the second holes of the transverse tube and the inner transverse tube do not overlap; in the grouting state: the inner transverse tube and the transverse tube rotate until their second holes overlap each other, and the inner tube rises so that the first holes of the fixed tube and the inner tube overlap each other.

[0009] This arrangement can prevent the soil and other fillers in the foundation from entering the transverse tube and telescopic tube during the construction process, thereby preventing the soil in the foundation from affecting the tension and measurement of the measuring rope. After the construction is completed, it is convenient to rotate the inner transverse tube so that the corresponding first holes and second holes are aligned with each other, thereby facilitating the concrete slurry poured from the transverse tube to flow out from the first hole and the second hole to the outer wall of the transverse tube and the fixed tube respectively. This arrangement can form a mixed protective layer of concrete and soil on the outer wall of the transverse tube and the fixed tube, reducing the situation where this part of the soil suffers from water and soil loss due to low adhesion and thus foundation instability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Some embodiments of the present application are described below with reference to the accompanying drawings, in which: Figure 1 is a schematic diagram of an overall structure arranged in a road foundation in an embodiment of the present invention; Figure 2 is a cross-sectional view of structures such as a transverse tube and a telescopic tube in an embodiment of the present invention; Figure 3 yes Figure 2 A schematic diagram of the structure of part A in the middle; Figure 4 is a schematic diagram of the eccentric wheel rotating and pushing the inner tube upward to overlap the second hole in an embodiment of the present invention; Figure 5 Schematic diagram of the inner cross tube and the second holes of the cross tube not overlapping each other in the embodiment of the present invention; Figure 6 Schematic diagram of the overlapping and docking of the second holes of the inner cross tube and the cross tube in an embodiment of the present invention; Figure 7 is a schematic diagram of the first holes of the inner tube and the fixed tube not overlapping each other in the embodiment of the present invention; Figure 8 It is a schematic diagram of the overlapping and docking of the first holes of the inner tube and the fixed tube in an embodiment of the present invention.

[0011] List of reference numerals: 1. support frame; 2. weight block; 3. scale; 4. pulley; 5. inner cross tube; 6. cross tube; 7. foundation; 8. fixed tube; 9. displacement plate; 10. pipe sleeve; 11. first hole; 12. right-angle tee; 1201, inner cavity; 13. supporting base; 14. second hole; 15. inner tube; 16. eccentric wheel; 17. hollow plate; 18. measuring rope. DETAILED DESCRIPTION

[0012] Those skilled in the art should understand that the embodiments described below are merely preferred embodiments of the present application, which are merely used to explain the technical principles of the present application and are not used to limit the protection scope of the present application.

[0013] It should be noted that in the description of this application, the terms "center", "upper", "lower", "top", "bottom", "vertical", "horizontal", "inner", "outer" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0014] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0015] The settlement of the foundation is generally related to factors such as the foundation not being completely compacted during repair, uneven distribution of fillers in the foundation, and groundwater changes. In this application, the settlement of the foundation part of the road is monitored, and then the settlement of the entire road during the construction process is monitored. When the road is completed, the pipes used for measurement in this application need to be grouted backfilled to avoid soil erosion of the foundation part caused by this part of the structure.

[0016] like Figure 1-Figure 8 As shown, a road settlement monitoring device provided in this embodiment includes a measuring rope 18 and a transverse tube 6 and a vertical telescopic tube arranged in a road foundation 7. The transverse tube 6 and the telescopic tube are perpendicular to each other and connected. The telescopic tube includes a vertical pipe sleeve 10 and a fixed pipe 8 embedded in the pipe sleeve 10. The lower end of the fixed pipe 8 is supported by the transverse tube 6, and the upper end of the pipe sleeve 10 is fixed to the displacement plate 9; one end of the transverse tube 6 extends out of the foundation 7 and forms an extended end; one end of the measuring rope 18 is connected to the displacement plate 9, and the other end extends along the inner cavity of the telescopic tube and the transverse tube 6 in sequence, and is led out from the extended end of the transverse tube 6. A tension component for connecting and tensioning the measuring rope 18 is provided on the outside of the foundation 7.

[0017] Specifically, the transverse pipe 6, the pipe sleeve 10 and the fixed pipe 8 are all circular pipes. One end of the transverse pipe 6 is arranged in the foundation 7 of the road, and its extended end extends to the outside of the foundation 7. The lower end of the fixed pipe 8 can be directly connected to the transverse pipe 6 to achieve support, or it can be indirectly supported by other connecting parts.

[0018] In this embodiment, the displacement plate 9 can be in various shapes such as a square plate or a circular plate, as long as it is a horizontally placed plate. When monitoring the settlement of road construction, if the foundation 7 settles at the position of the displacement plate 9, the displacement plate 9 will drop synchronously with the filler of the foundation 7. The drop of the displacement plate 9 will reduce the distance between the lower surface of the displacement plate 9 and the lower end of the telescopic tube. In the absence of a tension component, the portion of the measuring rope 18 in the telescopic tube will be loose at this time. In this embodiment, the tension component arranged outside the foundation 7 can tension the measuring rope 18 at all times. At this time, part of the measuring rope 18 will be pulled out of the extended end of the transverse tube 6 and the foundation 7. The portion of the measuring rope 18 pulled out of the extended end on the transverse tube 6 is the size of the vertical settlement of the foundation 7 and even the entire road.

[0019] It is known that in the case of forming an extension channel for the measuring rope 18 by combining the telescopic tube and the transverse tube 6, in order to facilitate monitoring of road settlement during construction, the telescopic tube and the transverse tube 6 should be separated from the filler (soil and / or gravel, etc.) in the road foundation 7 outside as much as possible, so as to avoid the filler entering the internal space of the telescopic tube and the transverse tube 6 and squeezing the measuring rope 18, and to avoid the length of the measuring rope 18 extending out of the transverse tube 6 being unable to represent the height of the displacement plate 9. However, after the road construction is completed, when the transverse tube 6 and the telescopic tube are filled with concrete slurry to seal, the way in which the inner cavity of the telescopic tube and the transverse tube 6 is separated from the foundation 7 is not convenient for the concrete slurry to cover the surface of the transverse tube 6 and the telescopic tube, so that the filler such as soil at the foundation is easy to flow along the outer wall of the telescopic tube and the transverse tube 6 to the outside of the road base.

[0020] In order to enable the transverse tube 6 and the telescopic tube to be separated from the foundation 7 when monitoring road settlement, but connected with the external foundation 7 when pouring concrete slurry: in this embodiment, an inner tube 15 is embedded in the fixed tube 8, and an inner transverse tube 5 is embedded in the transverse tube 6. The side walls of the fixed tube 8 and the inner tube 15 respectively have a first hole 11, and the side walls of the transverse tube 6 and the inner transverse tube 5 respectively have a second hole 14; one end of the inner transverse tube 5 is a supporting end, and the supporting end is arranged below the inner tube 15. The supporting end of the inner transverse tube 5 is fixed with an eccentric wheel 16 coaxial with itself, and the eccentric wheel 16 stops at the lower end of the inner tube 15 to support the inner tube 15. The road settlement monitoring device has a monitoring state and a grouting state; in the monitoring state: the first holes 11 of the fixed tube 8 and the inner tube 15 do not overlap, and the second holes 14 of the cross tube 6 and the inner cross tube 5 do not overlap; in the grouting state: the inner cross tube 5 can rotate relative to the cross tube 6 until the second holes 14 of the two overlap with each other, and the inner cross tube 5 drives the eccentric wheel 16 to rotate to push the inner tube 15 to rise and make the first holes 11 of the fixed tube 8 and the inner tube 15 overlap with each other.

[0021] That is, in this embodiment, the transverse tube 6 and the inner transverse tube 5 realize overlapping alignment of the second holes 14 of the two by rotating, or decoupling. One end of the inner transverse tube 5 passes through the protruding end of the transverse tube 6 and the base 7, so that the inner transverse tube 5 and the transverse tube 6 can be rotated to realize the mutual rotation of the inner transverse tube 5 and the transverse tube 6. In the case where the inner transverse tube 5 supports the inner tube 15 by the eccentric wheel 16, the rotation of the inner transverse tube 5 can be converted into the rise of the inner tube 15 relative to the fixed tube 8 by the eccentric wheel 16. That is to say, in this embodiment, the fixed tube 8 and the inner tube 15 realize overlapping alignment of the first holes 11 of the two by relative sliding in the vertical direction.

[0022] The above-mentioned structural setting of the eccentric wheel 16 can make the rotation of the inner cross tube 5 realize the alignment of the first hole 11 and the second hole 14 at the same time, so as to facilitate the rapid switching of the entire monitoring device between the road settlement monitoring state and the grouting state.

[0023] During the grouting state, concrete slurry is poured in from the ends of the inner transverse tube 5 and the transverse tube 6, part of the concrete slurry overflows from the first hole 11 to the outer surface of the fixed tube 8, and another part of the concrete slurry overflows from the second hole 14 to the outer surface of the transverse tube 6, thereby forming a concrete protective layer on the outer wall surfaces of the transverse tube 6 and the fixed tube 8 in the telescopic tube, reducing the probability of the filler in the foundation 7 being lost along the transverse tube 6 and the telescopic tube.

[0024] Specifically, a plurality of first holes 11 are respectively provided on the fixed tube 8 and the inner tube 15 , and a plurality of second holes 14 are respectively provided on the cross tube 6 and the inner cross tube 5 .

[0025] As one of the specific structural forms, the inner transverse tube 5 rotates 90 degrees clockwise relative to the transverse tube 6 so that the second holes 14 of the two can be butted and overlapped, thereby making the inner cavities of the inner transverse tube 5 and the transverse tube 6 communicate with the outer side of the foundation through the second holes 14. Similarly, after the inner transverse tube 5 rotates 90 degrees, the end of the inner tube 15 in contact with the eccentric wheel 16 becomes farther and farther away from the center of the eccentric wheel as the eccentric wheel rotates, and the inner tube 15 rises relative to the fixed tube 8.

[0026] The supporting end of the inner transverse tube 5 mentioned above is located below the inner tube 15. As one specific structural form, when the fixed tube 8 and the transverse tube 6 are directly connected, a through hole is formed at the connection position between the two, and the supporting end of the inner transverse tube 5 is arranged in the through hole. As another specific structural form, when the fixed tube 8 is connected to the transverse tube through the following right-angle two-way tube or right-angle three-way tube (the right-angle two-way tube is connected in series between multiple sections of transverse tubes 6), the supporting end of the inner transverse tube 5 can be arranged in the inner cavity of the corresponding right-angle two-way tube or three-way tube.

[0027] In this embodiment, a spring (not shown in the figure) is sleeved on the outside of the fixed tube 8, and the upper end of the spring abuts against the lower end of the tube sleeve 10, and the lower end of the spring abuts against the cross tube 6. Specifically, when the spring is sleeved on the outside of the fixed tube 8, the spring can provide an upward elastic force to the tube sleeve 10 to prevent the tube sleeve 10 from falling directly vertically downward to contact the cross tube 6 under the action of its own gravity. However, the elastic force that the spring can provide here is set to not hinder the lifting and lowering of the tube sleeve 10 driven by the displacement plate 9 when the road settles. Preferably, the spring can be a metal spring. In some other structural settings, the spring can also be replaced with an elastic silicone pad or a bellows.

[0028] In this embodiment, the tension assembly includes a weight block 2, and a trough body lower than the foundation 7 is provided on the outer side of the foundation 7. The weight block 2 is connected to one end of the measuring rope 18 extending out of the foundation 7 so that the weight block 2 is suspended in the trough body. A vertical scale 3 is also provided in the trough body to measure the height of the weight block 2 along the vertical descent.

[0029] For details, see Figure 1A support frame 1 is provided at the trough body, and a pulley 4 is provided on the support frame 1. The pulley 4 is used to change the direction of the measuring rope 18 extending from a horizontal state to a vertical state.

[0030] In some other structural arrangements, the tension assembly includes a tension spring (not shown in the figure), a positioning frame is fixed to the outside of the base 7, the portion of the measuring rope 18 extending out of the base 7 is fixed to one end of the tension spring, the other end of the tension spring is fixed to the positioning frame, and a horizontal scale 3 is provided on the positioning frame.

[0031] In this embodiment, the measuring rope 18 includes a connecting section and an extension section that are connected to each other. The end of the connecting section away from the extension section is connected to the displacement plate 9, and the end of the extension section away from the connecting section is connected to the tension component. The tensile strength of the connecting section is less than the tensile strength of the extension section, and the tensile strength of the connecting section is set to: the tension of the tension component cannot break the connecting section. This setting method makes it easy for the user to pull the measuring rope 18 with external force, so that the measuring rope 18 is disconnected from the displacement plate 9 at the connecting section, and then it is easy to realize the recovery and reuse of most of the structure of the measuring rope 18 after the monitoring is completed.

[0032] In this embodiment, a plurality of telescopic tubes are configured for use with one transverse tube 6, and the plurality of telescopic tubes are arranged in sequence along the width direction of the road. The transverse tube 6 and the telescopic tubes are connected by a right-angle tee tube 12 or a right-angle two-way tube, and a pulley (not shown in the figure) is provided in the right-angle tee tube 12 or the right-angle two-way tube, and the rotation axis of the pulley is horizontally arranged and perpendicular to the axis of the transverse tube. The pulley 4 here is used to change the vertical measuring line in the telescopic tube into a horizontal measuring line.

[0033] Specifically, at one of the cross-sectional positions of the road foundation 7 perpendicular to its own length direction, multiple vertical telescopic tubes can be simultaneously arranged, and the lower end of the telescopic tube can be supported by the same horizontal tube 6, and the horizontal tube 6 here is a multi-section splicing structure. As one of the specific structural forms, three telescopic tubes are provided on the upper support of the same horizontal tube 6, and a right-angle two-way tube is installed at the end of the horizontal tube 6 farthest from the extended end, one port of the right-angle two-way tube is connected to the lower end of the fixed tube 8, and the other port is connected to the horizontal tube 6. Two right-angle three-way tubes 12 are connected in series in the middle of the horizontal tube 6, and the remaining port of the right-angle three-way tube 12 faces upward and is connected to the fixed tube 8 of the corresponding telescopic tube.

[0034] When the lower end of the telescopic tube is connected to the horizontal tube 6 through the right-angle three-way tube 12 or the right-angle two-way tube, the horizontal tube 6 can support the fixed tube 8 at the lower part of the telescopic tube. In order to further prevent the fixed tube 8 from sinking, a support foundation 13 formed by cast-in-place or prefabricated concrete is arranged below the fixed tube 8, the lower end of the support foundation 13 is lower than the foundation 7 of the road, and the upper end of the support foundation 13 supports the right-angle two-way tube or the right-angle three-way tube 12.

[0035] In this embodiment, the transverse tube 6 is formed by splicing a plurality of pipes along its own axial direction through connectors such as clamps. Sealing pads are provided at corresponding end faces of adjacent transverse tubes 6 to achieve sealing when adjacent transverse tubes 6 are spliced.

[0036] In this embodiment, one end of the inner transverse tube 5 extending out of the transverse tube 6 is connected with a grouting joint, and the grouting joint is used to connect the grouting equipment. Specifically, the grouting joint is a rotary joint, which is connected to the grouting pipe of the grouting equipment. The specific structural form of the grouting structure here can adopt the existing structure, which will not be repeated here.

[0037] In this embodiment, the lower end of the inner tube 15 has a hollow plate 17 that abuts against the eccentric wheel, and the center of the hollow plate 17 has a hollow hole. When the hollow plate 17 is provided at the lower end of the inner tube 15, it is convenient to abut the eccentric wheel 16 against the hollow plate 17, thereby achieving the support of the eccentric wheel 16 for the inner tube 15. This arrangement is convenient for reducing the difficulty of installing the inner tube 15 and the eccentric wheel 16, so that the eccentric wheel 16 does not need to abut and support the lower annular surface of the inner tube 15.

[0038] In this embodiment, the transverse tube 6 has a first limiting portion (not shown in the figure), and the inner transverse tube 5 has a second limiting portion (not shown in the figure). When the inner transverse tube 5 rotates along the set direction until the first limiting portion and the second limiting portion stop, the inner transverse tube 5 overlaps with the second hole 14 on the transverse tube 6, and the inner tube 15 overlaps with the first hole 11 of the fixed tube 8. Specifically, the first limiting portion and the second limiting portion here are limiting plates, the first limiting portion is provided on the end surface of the transverse tube 6, and the second limiting portion is provided on the outer wall surface of the inner transverse tube 5.

[0039] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments of the foregoing text, but it is easy for those skilled in the art to understand that the protection scope of the present application is not limited to the above preferred embodiments. Without departing from the technical principles of the present application, those skilled in the art may split and combine the technical solutions in the above preferred embodiments, and may also make equivalent changes or replacements to the relevant technical features, and any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A road settlement monitoring device, characterized in that: include: The horizontal tube and the vertical telescopic tube arranged in the road foundation are perpendicular to each other and connected. The telescopic tube includes a vertical pipe sleeve and a fixed pipe embedded in the pipe sleeve. The lower end of the fixed pipe is supported by the horizontal tube, and the upper end of the pipe sleeve is fixed to the displacement plate. One end of the horizontal tube extends out of the foundation and forms an extended end. It also includes a measuring rope, one end of which is connected to the displacement plate, and the other end of which extends along the inner cavities of the telescopic tube and the transverse tube in sequence and is led out from the extended end of the transverse tube. A tension component for connecting and tensioning the measuring rope is provided on the outer side of the foundation; The fixed tube is embedded with an inner tube, the transverse tube is embedded with an inner transverse tube, the side walls of the fixed tube and the inner tube are respectively provided with a first hole, and the side walls of the transverse tube and the inner transverse tube are respectively provided with a second hole; one end of the inner transverse tube is a supporting end, and the supporting end is arranged below the inner tube, and an eccentric wheel coaxial with the inner transverse tube is fixed to the supporting end of the inner transverse tube, and the eccentric wheel abuts against the lower end of the inner tube to support the inner tube; The road settlement monitoring device has a monitoring state and a grouting state. In the monitoring state: the first holes of the fixed tube and the inner tube do not overlap, and the second holes of the cross tube and the inner cross tube do not overlap; in the grouting state: the inner cross tube can rotate relative to the cross tube until the second holes of the two overlap with each other, and the inner cross tube drives the eccentric wheel to rotate to push the inner tube to rise and make the first holes of the fixed tube and the inner tube overlap with each other.

2. The road settlement monitoring device according to claim 1, characterized in that: The outer sleeve of the fixed pipe is provided with a spring, the upper end of the spring abuts against the lower end of the pipe sleeve, and the lower end of the spring abuts against the horizontal pipe.

3. The road settlement monitoring device according to claim 1 or 2, characterized in that: The tension assembly includes a weight block, and a trough body lower than the foundation is provided on the outer side of the foundation. The weight block is connected to one end of the measuring rope extending out of the foundation so that the weight block is suspended in the trough body. A vertical scale is also provided in the trough body to measure the height of the weight block descending vertically.

4. The road settlement monitoring device according to claim 1 or 2, characterized in that: The tension assembly includes a tension spring, a positioning frame is fixed to the outside of the foundation, the portion of the measuring rope extending out of the foundation is fixed to one end of the tension spring, the other end of the tension spring is fixed to the positioning frame, and a horizontal scale is provided on the positioning frame.

5. The road settlement monitoring device according to claim 1, characterized in that: The measuring rope includes a connecting section and an extension section that are connected to each other, wherein one end of the connecting section away from the extension section is connected to the displacement plate, and one end of the extension section away from the connecting section is connected to the tension assembly, the tensile strength of the connecting section is less than that of the extension section, and the tensile strength of the connecting section is set so that the tensile force of the tension assembly cannot break the connecting section.

6. The road settlement monitoring device according to claim 1, characterized in that: One of the transverse tubes is configured with a plurality of telescopic tubes for use, and the plurality of telescopic tubes are arranged in sequence along the width direction of the road, and the transverse tube and the telescopic tubes are connected by a right-angle three-way tube or a right-angle two-way tube.

7. The road settlement monitoring device according to claim 1 or 6, characterized in that: The transverse tube is formed by splicing a plurality of pipe pieces along its axial direction.

8. The road settlement monitoring device according to claim 1, characterized in that: One end of the inner horizontal pipe extending out of the horizontal pipe is connected with a grouting joint for connecting a grouting device.

9. The road settlement monitoring device according to claim 1, characterized in that: The lower end of the inner tube is provided with a hollow plate which abuts against the eccentric wheel, and the center of the hollow plate is provided with a hollow hole.

10. The road settlement monitoring device according to claim 1, characterized in that: The cross tube has a first limit portion, and the inner cross tube has a second limit portion. When the inner cross tube rotates along a set direction until the first limit portion and the second limit portion stop, the inner cross tube overlaps with the second hole on the cross tube, and the inner tube overlaps with the first hole on the fixed tube.

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