Ground subsidence monitoring device for prevention and control of urban geological disasters

Abstract

The invention relates to the technical field of land subsidence monitoring equipment, and discloses a land subsidence monitoring device for urban geological disaster prevention and control, which comprises a mounting seat, a cylinder is fixedly mounted at the top of the mounting seat, a differential pressure sensor is arranged in an inner cavity of the mounting seat, a partition plate is arranged in the cylinder, and a pressure sensor is arranged in the partition plate. The inner cavity of the barrel is divided into a water level change cavity and a reference cavity by the partition plate, the same water level height is set in the two cavities initially, and the two cavities are communicated with the two water inlets in the differential pressure sensor through water guide pipes respectively. When the device is applied to urban geological disaster prevention and control, the device can be arranged in an electromagnetic interference environment such as a high-voltage power transmission line, the inner cavity air pressure environment of the water level change cavity and the reference cavity is always in the same state, and the monitoring result is not influenced by the external environment change; monitoring personnel can directly record the land subsidence condition on site according to the water level height difference between the water level change chamber and the reference chamber.

Description

Technical Field

[0001] The present application relates to the technical field of ground subsidence monitoring equipment, and in particular to a ground subsidence monitoring device for urban geological disaster prevention and control. Background Art

[0002] Ground subsidence monitoring is a vital task in geological disaster prevention and control. It involves observing and analyzing the dynamic changes of ground subsidence disasters in order to prevent and reduce the hazards caused by them. The existing ground subsidence monitoring equipment is mainly pressure differential static level and magnetostrictive level.

[0003] The differential pressure static level calculates the liquid level height through pressure changes using the pressure formula P=ρgh. However, the pressure change compares the initial state and the state after sedimentation. During long-term monitoring, the environment in the initial state and the environment during monitoring after sedimentation may not be the same, and the accuracy of the monitoring results may be easily affected by environmental changes.

[0004] Among them, the magnetostrictive static level uses the change in liquid level height of the liquid float as the ground settles, and the moving distance of the magnetostrictive level meter (or magnetostrictive displacement sensor) to monitor the height of the ground settlement. However, it may also cause inaccurate monitoring results in environments with electromagnetic interference such as high-voltage transmission lines.

[0005] Moreover, when the sensor of the pressure differential static level and the magnetostrictive static level fails, they cannot monitor the settlement results in time. Summary of the invention

[0006] The present application proposes a ground subsidence monitoring device for urban geological disaster prevention and control, which has the advantages of being able to cope with electromagnetic interference environments, being able to adapt to environmental changes and accurately monitor ground subsidence results, and being able to intuitively understand ground subsidence conditions when a sensor fails. This device is used to solve the problems that the accuracy of monitoring results of existing differential pressure static levels is easily affected by changes in the initial environment and the environment during monitoring after settlement, and that the accuracy of monitoring results of magnetostrictive static levels is affected by the electromagnetic interference environment, and that the two types of static levels cannot monitor ground subsidence results in a timely manner when the sensors fail.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a ground subsidence monitoring device for urban geological disaster prevention and control, comprising a mounting seat, a cylinder body is fixedly mounted on the top of the mounting seat, a barrel cover is fixedly mounted on the top of the cylinder body, a water supply pipe is connected to one side of the mounting seat, a ventilation pipe is connected to one side of the barrel cover, a carrier plate is provided in the inner cavity of the mounting seat, a pressure difference sensor is provided under the carrier plate, a partition is installed on the top of the carrier plate, the partition divides the inner cavity of the cylinder body into two chambers, a water level change chamber and a reference chamber, and initially the same water level height is set in the two chambers, the water supply pipe and the ventilation pipe are both connected to the water level change chamber, and the two chambers are respectively connected to the two water inlets on the pressure difference sensor with water pipes.

[0008] Furthermore, two water pipes are provided on the side of the mounting seat, and both water pipes are connected to the inner cavity of the water level change chamber, and the water level change chamber in a ground subsidence monitoring device at a reference point is connected with the water level change chamber in the ground subsidence monitoring device at each monitoring point by means of the water pipes; two ventilation pipes are provided on the side of the cylinder cover, and both ventilation pipes are connected to the inner cavity of the water level change chamber, and the water level change chamber in the subsidence monitoring device at the reference point is connected with the water level change chamber in the ground subsidence monitoring device at each monitoring point by means of the ventilation pipes.

[0009] Furthermore, a support ring plate is movably mounted on the bottom of the inner cavity of the mounting seat, and the outer side of the support ring plate is fitted with the inner side of the mounting seat. The carrier plate is located above the support ring plate, and the carrier plate is fixed to the inside of the mounting seat by bolts. The support ring plate is supported by the carrier plate to avoid relying solely on fixing bolts for support, which may easily lead to the support ring plate being unreliable and affect the partition effect.

[0010] Furthermore, a sealing ring is provided between the outer side of the carrier plate and the inner wall of the mounting seat, and two water guide holes are provided on the carrier plate, and one of the water guide holes connects one of the water guide pipes and the water level change chamber, and the other water guide hole connects the other water guide pipe and the reference chamber.

[0011] Furthermore, the cylinder is made of glass and is provided with a scale, which makes it convenient for monitoring personnel to record the ground subsidence on site directly according to the water level height difference between the water level change chamber and the inner cavity of the reference chamber, so as to timely monitor the ground subsidence when the sensor of the ground subsidence monitoring equipment fails.

[0012] Furthermore, a limit plate is fixedly installed on the top of the inner cavity of the cylinder cover, the bottom end of the partition is plugged into the top of the carrier plate, and the top end of the partition is plugged into the bottom of the limit plate, which facilitates the installation and fixation of the partition in the cylinder.

[0013] Furthermore, sealing strips I are respectively provided at the plug-in parts of the partition and the carrier plate, and at the plug-in parts of the partition and the limit plate, and sealing strips II are respectively provided between the two sides of the partition and the inner wall of the cylinder. Through the sealing arrangement of the sealing strips I and II on the outer periphery of the partition, the partition separates the chamber between the carrier plate and the limit plate into a water level change chamber and a reference chamber, so that the height value of the ground subsidence can be obtained according to the pressure difference between the inner cavities of the water level change chamber and the reference chamber under the same environment.

[0014] Furthermore, the cylinder cover is also provided with a water injection port connected to the reference chamber, which is convenient for adding water to the inner cavity of the reference chamber separately through the water injection port, and a pipe plug is provided on the water injection port, which is sealed after adding water to the inner cavity of the reference chamber to ensure that the water in the reference chamber always settles together with the ground subsidence monitoring device.

[0015] Furthermore, a through groove is opened on the top of the partition, which connects the inner cavity of the water level change chamber and the reference chamber, so that the gas environment and air pressure in the water level change chamber and the reference chamber are the same, ensuring that the differential pressure sensor monitors the pressure difference of the water in the water level change chamber and the reference chamber under the same environment.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present application provides a ground subsidence monitoring device for urban geological disaster prevention and control. By setting a water level change chamber and a reference chamber in the cylinder, a pressure difference sensor is used to monitor the water pressure difference ΔF between the water level change chamber and the reference chamber at the monitoring point in real time. According to the formula ΔH=ΔF / ρ 水 g(where ρ 水 is the density of water, g is the acceleration of gravity), so that the height of the ground subsidence can be accurately obtained. Compared with the existing method of monitoring ground subsidence by magnetostatic level, when applied to urban geological disaster prevention and control, it can be set in an environment with electromagnetic interference such as high-voltage transmission lines, thereby improving the accuracy of the ground subsidence monitoring device in monitoring the structure in an electromagnetic environment.

[0018] 2. The present application provides a ground subsidence monitoring device for urban geological disaster prevention and control. By eliminating the floating block in the subsidence device, when the ground subsidence at the monitoring point is not vertical, that is, the ground subsidence monitoring device is in an inclined state after the ground subsidence, it avoids the problem of inaccurate monitoring results caused by the friction resistance between the floating block and the shaft used for limiting the existing equipment, thereby further improving the accuracy of the monitoring results of the ground subsidence monitoring device.

[0019] 3. The cylinder is divided into a water level change chamber and a reference chamber by a partition, and a through groove is opened on the top of the partition. The air pressure environment in the water level change chamber and the reference chamber is always in the same state. Therefore, the results of ground subsidence monitoring will not be affected by external temperature changes, atmospheric pressure changes and humidity changes, thereby improving the ability of ground subsidence monitoring to adapt to environmental changes.

[0020] 4. The monitoring personnel can directly record the ground subsidence on site according to the water level height difference between the water level change chamber and the reference chamber, so as to timely monitor the ground subsidence when the sensor of the ground subsidence monitoring equipment fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the cut structure at aa;

[0024] Figure 3 for Figure 2 Schematic diagram of the internal structure of the middle mounting seat;

[0025] Figure 4 For the present invention Figure 1 Schematic diagram of the cross-section structure at bb.

[0026] In the figure: 1. mounting seat; 2. supporting ring plate; 3. carrier plate; 4. cylinder body; 5. cylinder cover; 6. partition plate; 601, through groove; 7. limit plate; 8. sealing strip I; 9. sealing strip II; 10. water level change chamber; 11. reference chamber; 12. differential pressure sensor; 13. water guide pipe; 14. water delivery pipe; 15. ventilation pipe; 16. pipe plug. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-Figure 2 A ground subsidence monitoring device for urban geological disaster prevention and control comprises a mounting seat 1, a bottom movably sleeved with a supporting ring plate 2 in the inner cavity of the mounting seat 1, and the outer side of the supporting ring plate 2 is fitted with the inner side of the mounting seat 1, the inner movably sleeved with a carrier plate 3, the carrier plate 3 is located above the supporting ring plate 2, and the carrier plate 3 is fixed to the inside of the mounting seat 1 by bolts, a sealing ring is provided between the outer side of the carrier plate 3 and the inner wall of the mounting seat 1, a cylinder 4 is fixedly sleeved on the top of the mounting seat 1, the cylinder 4 is made of glass, and a scale is provided on the cylinder 4, so that the observer can intuitively observe the water level in the cylinder 4, and a cylinder cover 5 is fixedly installed on the top of the cylinder 4.

[0029] See also Figure 2-Figure 3 A partition 6 is installed inside the cylinder 4, and the bottom end of the partition 6 is plugged with the top of the carrier plate 3. A limit plate 7 is fixedly installed on the top of the inner cavity of the cylinder cover 5. The top of the partition 6 is plugged with the bottom of the limit plate 7, and the plugging parts of the partition 6 and the carrier plate 3 and the plugging parts of the partition 6 and the limit plate 7 are respectively provided with sealing strips I8, and sealing strips II9 are respectively provided between the two sides of the partition 6 and the inner wall of the cylinder 4. Through the sealing strips I8 and II9 on the outer periphery of the partition 6, the partition 6 divides the chamber between the carrier plate 3 and the limit plate 7 into a water level change chamber 10 and a reference chamber 11.

[0030] Two water guide holes are provided on the carrier plate 3, and the two water guide holes are connected to the water level change chamber 10 and the reference chamber 11 respectively. A pressure difference sensor 12 is provided inside the mounting base 1 and is located below the carrier plate 3. Two water guide pipes 13 are fixedly installed on the bottom of the carrier plate 3, and the two water guide pipes 13 are connected to the water guide holes respectively, and the two water guide pipes 13 are connected to two water inlets on the pressure difference sensor 12 respectively. Through the arrangement of the water guide holes and the water guide pipes 13, the pressure difference sensor 12 is used to monitor the pressure difference ΔF of the water in the water level change chamber 10 and the reference chamber 11 in real time.

[0031] See also Figure 2-Figure 4Two water pipes 14 are arranged on the side of the mounting seat 1, and the two water pipes 14 are connected to the inner cavity of the water level change chamber 10, and the water pipe 14 is used to connect the water level change chamber 10 in the ground subsidence monitoring device at a reference point with the water level change chamber 10 in the ground subsidence monitoring device at each monitoring point, and two vent pipes 15 are arranged on the side of the cylinder cover 5, and the two vent pipes 15 are connected to the inner cavity of the water level change chamber 10, and the vent pipe 15 is used to connect the water level change chamber 10 in the subsidence monitoring device at the reference point with the water level change chamber 10 in the ground subsidence monitoring device at each monitoring point. The water level change chamber 10 is connected to the reference chamber 11, and a through groove 601 is provided on the top of the partition 6. The water level change chamber 10 and the inner cavity of the reference chamber 11 are connected through the through groove 601, so that the gas environment and air pressure in the water level change chamber 10 and the reference chamber 11 are the same, ensuring that the pressure difference sensor 12 monitors the pressure difference of the water in the water level change chamber 10 and the reference chamber 11 under the same environment. A water injection port connected to the reference chamber 11 is also provided on the cylinder cover 5, which is convenient for adding water to the inner cavity of the reference chamber 11 separately through the water injection port, and a pipe plug 16 is provided on the water injection port to seal the inner cavity of the reference chamber 11 after adding water.

[0032] Initially, the water level height in the inner cavity of the water level change chamber 10 of the ground subsidence monitoring device at each monitoring point is set to be the same as the water level height in the reference chamber 11 and the inner cavity of the reference chamber 11. At this time, the pressure difference ΔF in the water level change chamber 10 and the reference chamber 11 is zero. When the ground subsidence monitoring device at the monitoring point sinks with the ground, the water level height in the inner cavity of the reference chamber 11 remains unchanged, while the water level height in the inner cavity of the water level change chamber 10 is the same as the water level height in the water level change chamber 10 in the ground subsidence monitoring device at the reference point. At this time, the water level difference ΔH in the water level change chamber 10 at the monitoring point and the reference chamber 11 is the height value of the ground subsidence. The water pressure difference ΔF in the water level change chamber 10 at the monitoring point and the reference chamber 11 monitored in real time by the differential pressure sensor 12 is calculated according to the formula ΔH=ΔF / ρ 水 gwhere ρ 水 is the density of water, g is the acceleration of gravity, so the height of ground subsidence can be accurately obtained.

[0033] Compared with the existing static level, since the air pressure environment of the water level change chamber 10 and the reference chamber 11 is always in the same state, the result of ground subsidence monitoring can be unaffected by external temperature changes, atmospheric pressure changes and humidity changes, and the magnetostrictive sensor is cancelled and replaced by a differential pressure sensor. When applied to urban geological disaster prevention and control, it can be set in an environment with electromagnetic interference such as a high-voltage transmission line. At the same time, the floating block in the settlement device is cancelled. When the ground settlement of the monitoring point is not vertical settlement, that is, the ground settlement monitoring device is in an inclined state after the ground settlement, it avoids the problem that the existing equipment is easily affected by the friction resistance between the floating block and the shaft for limiting, resulting in inaccurate monitoring results, further improving the accuracy of the monitoring results of the ground settlement monitoring device, and using the cylinder 4 as a glass material with a scale design, it is convenient for monitoring personnel to directly record the ground settlement on site according to the water level height difference between the water level change chamber 10 and the reference chamber 11, so as to deal with the sensor failure of the ground settlement monitoring equipment, and can timely monitor the ground settlement.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ground subsidence monitoring device for urban geological disaster prevention and control, comprising a mounting seat (1), a cylinder (4) fixedly mounted on the top of the mounting seat (1), a cylinder cover (5) fixedly mounted on the top of the cylinder (4), a water pipe (14) connected to one side of the mounting seat (1), and a ventilation pipe (15) connected to one side of the cylinder cover (5), characterized in that: The inner cavity of the mounting seat (1) is provided with a carrier plate (3), a differential pressure sensor (12) is provided below the carrier plate (3), a partition plate (6) is installed on the top of the carrier plate (3), the partition plate (6) divides the inner cavity of the cylinder (4) into two chambers, a water level change chamber (10) and a reference chamber (11), and the same water level height is set in the two chambers initially, the water delivery pipe (14) and the ventilation pipe (15) are both connected to the water level change chamber (10), and the two chambers are respectively connected to the two water inlets on the differential pressure sensor (12) by water guide pipes (13).

2. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 1, characterized in that: Two water pipes (14) are arranged on the side of the mounting seat (1), and both water pipes (14) are connected to the inner cavity of the water level change chamber (10); two ventilation pipes (15) are arranged on the side of the cylinder cover (5), and both ventilation pipes (15) are connected to the inner cavity of the water level change chamber (10).

3. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 1, characterized in that: A support ring plate (2) is movably mounted on the bottom of the inner cavity of the mounting seat (1), and the outer side of the support ring plate (2) is in contact with the inner side of the mounting seat (1), and the carrier plate (3) is located above the support ring plate (2).

4. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 1, characterized in that: A sealing ring is provided between the outer side of the carrier plate (3) and the inner wall of the mounting seat (1), and two water guide holes are provided on the carrier plate (3), one of the water guide holes is connected to one of the water guide pipes (13) and the water level change chamber (10), and the other water guide hole is connected to the other water guide pipe (13) and the reference chamber (11).

5. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 1, characterized in that: The material of the cylinder (4) is glass, and a scale is provided on the cylinder (4).

6. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 1, characterized in that: A limiting plate (7) is fixedly mounted on the top of the inner cavity of the cylinder cover (5); the bottom end of the partition plate (6) is plugged into the top of the carrier plate (3); and the top end of the partition plate (6) is plugged into the bottom of the limiting plate (7).

7. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 6, characterized in that: Sealing strips I (8) are provided at the plug-in locations of the partition (6) and the carrier plate (3) and at the plug-in locations of the partition (6) and the limit plate (7), respectively. Sealing strips II (9) are provided between the two sides of the partition (6) and the inner wall of the cylinder (4), respectively. The partition (6) divides the chamber between the carrier plate (3) and the limit plate (7) into a water level change chamber (10) and a reference chamber (11) by sealing the outer periphery of the partition (6) with the sealing strips I (8) and II (9).

8. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 1, characterized in that: The cylinder cover (5) is also provided with a water injection port which is in communication with the reference chamber (11).

9. A ground subsidence monitoring device for urban geological disaster prevention and control according to claim 1, characterized in that: A through groove (601) is provided on the top of the partition (6), and the through groove (601) communicates with the inner cavities of the water level change chamber (10) and the reference chamber (11).

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