Groundwater-soil correlation monitoring and analysis method and platform based on same-hole monitoring

Abstract

The invention discloses a groundwater-soil correlation monitoring and analysis method and platform based on same-hole monitoring, and relates to the technical field of groundwater-soil monitoring and analysis. The platform comprises an inclinometer tube, a permeable flower tube, a sedimentation tube, and a plug which are sequentially connected from top to bottom. An array displacement meter and a magnetic induction device are installed on the inner wall of the inclinometer tube, and a sedimentation magnetic ring corresponding to the magnetic induction device is installed on the outer wall of the inclinometer tube. A groundwater level sensor is arranged in the middle of the permeable flower tube, a rope body is connected to the top of the groundwater level sensor, and one end of the rope body away from the groundwater level sensor is fixed on the top of the inclinometer tube. An RTU is also arranged on the top of the inclinometer tube. The invention can realize the integrated real-time monitoring of groundwater and land in the urban geological environment, realize the goal of one hole for multiple uses and one machine for multiple measurements, provide high-quality data support for the prevention and control of urban ground subsidence, collapse and other disasters, and lay a foundation for the subsequent linkage analysis of water and soil index changes.

Description

Technical Field

[0001] The present invention relates to the technical field of underground water and soil monitoring and analysis, and in particular to an underground water and soil correlation monitoring and analysis method and platform based on same-hole monitoring. Background Art

[0002] In the field of geological environment monitoring, changes in groundwater and underground soil are very important indicators. The safety of soil and water directly reflects the safety of urban geology. Therefore, in some areas of the city, it is necessary to monitor changes in groundwater, underground soil and the relationship between the two.

[0003] Among them, the traditional underground water and soil monitoring method is carried out in two holes. With the increasing development of cities today, the approval of ground land use is cumbersome, and a large amount of underground water and soil monitoring occupies a lot of land. At the same time, these traditional monitoring methods are difficult to form an effective linkage of later data. More specifically, the traditional monitoring methods have the following problems:

[0004] First, the monitoring indicators are single. Most single holes can only monitor a single indicator, such as water level, stratified settlement, lateral displacement, etc., and the coupled changes in water and soil cannot be effectively linked.

[0005] Second, the surface land use of monitoring equipment is complex, wasting land resources.

[0006] Third, the power supply network cannot be integrated, and most of them require solar energy or external power supply, which destroys the original surface coverage.

[0007] In addition, the research on the relationship between groundwater and soil deformation is currently divided into two major directions. One is to explore the impact of groundwater level changes on soil deformation based on finite element simulation; the other is to analyze the correlation between groundwater level changes and soil deformation on a large scale based on satellite remote sensing data.

[0008] Both methods introduced above can reflect the impact of groundwater level changes on soil to a certain extent, but both have relevant shortcomings, as follows:

[0009] First, the method based on satellite remote sensing data has a weak sense of spatial boundaries of the research object and can often only analyze the entire area. In fact, the impact of groundwater changes on areas with different degrees of subsidence is also different.

[0010] Second, the research process based on the finite element simulation method is difficult to focus. It is difficult to restore the actual groundwater action process through quantitative settings of pumping and filling experiments, so the results obtained may be incomplete.

[0011] Therefore, it is necessary to develop a groundwater-soil correlation monitoring and analysis method and platform based on same-hole monitoring to solve the above problems. Summary of the invention

[0012] In order to solve the above problems, the present invention provides the following technical solutions: a groundwater-soil correlation monitoring and analysis platform based on same-hole monitoring, which is placed in a borehole, and the platform includes an inclinometer tube, a water-permeable flower tube, a sedimentation tube, and a plug connected in sequence from top to bottom, wherein an array displacement meter and a magnetic induction device are installed on the inner wall of the inclinometer tube, and a sedimentation magnetic ring corresponding to the magnetic induction device is installed on the outer wall of the inclinometer tube;

[0013] A groundwater level sensor is arranged in the middle of the permeable flower tube, a rope body is connected to the top of the groundwater level sensor, one end of the rope body away from the groundwater level sensor is fixed to the top of the inclinometer tube, and an RTU is also arranged on the top of the inclinometer tube for supplying power to the array displacement meter, magnetic induction device and groundwater level sensor and transmitting signals.

[0014] Further, as a preference, the sedimentation magnetic ring includes a magnetic ring body, an outer ring capsule is attached to the outer surface of the magnetic ring body, an inner ring capsule is attached to the inner surface of the magnetic ring body, the inner ring capsule and the outer ring capsule are both filled with gas, and the inner ring capsule and the outer ring capsule are both made of expandable and contractible materials.

[0015] Furthermore, as a preference, a micro pump is also fixed on the inner wall of the inclinometer tube, and the micro pump has a first inlet and a second inlet, wherein the first inlet and the second inlet are connected to the outer ring bag via a first pipeline, and the second inlet and the second inlet are connected to the inner ring bag via a second pipeline.

[0016] Furthermore, preferably, a plurality of protrusions are circumferentially spaced apart on the outer wall of the inclinometer tube, and in an initial state, part of the inner surface of the inner ring bag is supported on the protrusions, and another part of the inner surface is embedded between adjacent protrusions, and when the liquid in the inner ring bag is pumped into the outer ring bag by a micro pump, the following state exists: the inner surface of the inner ring bag is supported on the protrusions, and the outer surface of the outer ring bag contacts the inner wall of the borehole.

[0017] Further, preferably, a plurality of resistance increasing mechanisms are distributed at intervals in the circumferential direction on the outer surface of the outer ring capsule, and the resistance increasing mechanisms include:

[0018] A fixing plate fixed to the outer surface of the outer ring bag;

[0019] A deflection plate, one end of which is hinged to the fixed plate, and a plurality of claws are fixed on a side of the deflection plate away from the fixed plate;

[0020] An elastic pad is filled between the fixing plate and the deflection plate.

[0021] Further, preferably, the plug is a conical structure.

[0022] Further, as a preference, the outer surface of the water-permeable flower tube is covered with back gauze, and the drilled hole is filled with backfill covering the outside of the gauze.

[0023] The groundwater-soil correlation monitoring and analysis method based on the same-hole monitoring includes the following steps:

[0024] S1. Select three areas with different degrees of land subsidence, namely high, medium and low;

[0025] S2. Deploy m platforms in each area;

[0026] S3. Continuously collect the groundwater level change data and soil deformation data monitored by the platforms in the three areas of high, medium and low for a period of time;

[0027] S4. Perform correlation analysis on the collected groundwater level change data and soil layer deformation data to obtain the Pearson correlation coefficient between groundwater level and soil layer deformation at a single measuring point ;

[0028] S5. Comprehensive comparative analysis of the correlation between the two in different regions, among which the Pearson correlation coefficient between groundwater level and soil deformation at a single measuring point is used Calculate the average value of the Pearson correlation coefficient of the three areas of high, medium and low , and then conduct a comprehensive analysis, among which,

[0029]

[0030]

[0031]

[0032] in, Indicates the first measuring points; Indicates the number of measurement points in each area of ​​high, medium and low; represents the average value of Pearson correlation coefficient in the high settlement area; represents the average value of Pearson correlation coefficient in the middle settlement area; Represents the average value of Pearson correlation coefficient in low settlement area.

[0033] Among them, the Pearson correlation coefficient between the groundwater level at a single measuring point and the soil deformation is obtained include:

[0034] 1) Establish groundwater level change and soil deformation data sets at different monitoring points;

[0035] 2) Split each data set randomly into training set, validation set and test set;

[0036] 3) Build a model based on the Pearson correlation coefficient, train the model for each training set in the three regions of high, medium and low, and then use the test set to verify the trained model.

[0037] Wherein, the model of the Pearson correlation coefficient is:

[0038]

[0039] in, Represents the groundwater level value at a single time point. It represents the average groundwater level within the entire monitoring period; Represents the soil deformation value at a single time point, It represents the average soil deformation value within the entire monitoring period; Indicates the number of data of a single measuring point.

[0040] Compared with the prior art, the present invention provides a groundwater-soil correlation monitoring and analysis method and platform based on same-hole monitoring, which has the following beneficial effects:

[0041] First, the present invention can realize integrated real-time monitoring of groundwater and land in the urban geological environment, achieve the goal of multiple uses of one hole and multiple measurements of one machine, improve the technical level of urban geological environment monitoring and the integrated application capabilities of equipment, provide high-quality data support for the prevention and control of urban ground subsidence, collapse and other disasters, and lay the foundation for the subsequent linkage analysis of changes in water and soil indicators.

[0042] Second, by adjusting the inflation and deflation of the outer ring bag and the inner ring bag, the present invention enables the magnetic ring body to be tightly attached to the outer wall of the inclinometer tube or tightly embedded in the side wall of the borehole; this embedded installation enables the magnetic ring body to respond more directly to changes in the soil layer, thereby improving the accuracy of the monitoring data and the installation efficiency; it improves the accuracy and stability of monitoring, simplifies the construction process, and facilitates future maintenance and upgrades.

[0043] Third, the present invention adopts the Pearson correlation coefficient to analyze and study the correlation between groundwater level changes and soil deformation. At the same time, this method uses groundwater level change data and soil deformation data based on the same-hole monitoring to verify the results. The Pearson correlation coefficient method is fast to calculate and does not require a large number of samples. It can realize the quantitative analysis of the coupled changes of groundwater and land subsidence in urban geological environments, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural diagram of the groundwater-soil correlation monitoring and analysis platform based on same-hole monitoring;

[0045] Figure 2It is a schematic diagram of the principle of the array displacement meter in the groundwater-soil correlation monitoring and analysis platform based on the same-hole monitoring;

[0046] Figure 3 It is a schematic diagram of the structure of the settlement magnetic ring and magnetic induction device in the groundwater-soil correlation monitoring and analysis platform based on the same-hole monitoring;

[0047] Figure 4 It is a schematic diagram of the structure of the sedimentation magnetic ring in the groundwater-soil correlation monitoring and analysis platform based on the same-hole monitoring;

[0048] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at point A;

[0049] In the figure: 1. inclinometer tube; 2. permeable flower tube; 3. sedimentation tube; 4. plug; 5. array displacement meter; 6. sedimentation magnetic ring; 7. gauze; 8. sedimentation sediment; 9. groundwater level sensor; 10. RTU; 11. magnetic induction device; 12. borehole; 101. protrusion; 102. micro pump; 103. first pipeline; 104. second pipeline; 61. magnetic ring body; 62. inner ring capsule; 63. outer ring capsule; 64. resistance increasing mechanism; 641. fixing plate; 642. elastic pad; 643. deflection plate; 644. claw. DETAILED DESCRIPTION

[0050] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned description of the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0051] Example: Please refer to Figure 1-Figure 5 In an embodiment of the present invention, a groundwater-soil correlation monitoring and analysis platform based on same-hole monitoring is provided, which is placed in a borehole 12. The platform includes an inclinometer tube 1, a water-permeable flower tube 2, a sedimentation tube 3, and a plug 4 connected in sequence from top to bottom, wherein an array displacement meter 5 and a magnetic induction device 11 are installed on the inner wall of the inclinometer tube 1, and a sedimentation magnetic ring 6 corresponding to the magnetic induction device 11 is installed on the outer wall of the inclinometer tube 1. The sedimentation tube 3 is also used to place sediment 8;

[0052] A groundwater level sensor 9 is arranged in the middle of the permeable flower tube 2, and a rope is connected to the top of the groundwater level sensor 9. One end of the rope away from the groundwater level sensor 9 is fixed to the top of the inclinometer tube 1. An RTU 10 is also arranged on the top of the inclinometer tube 1 for supplying power to the array displacement meter 5, the magnetic induction device 11, and the groundwater level sensor 9 and transmitting signals.

[0053] Among them, the array displacement meter 5 is a static application of the MEMS accelerometer. It uses the gravity acceleration in the three axial components of the MEMS accelerometer to calculate the angle between each MEMS accelerometer and the vertical and horizontal directions, and combines the length of the MEMS accelerometer to calculate the vertical and horizontal displacements, that is, the coordinates (X, Y, Z) of each node relative to the reference point (coordinate origin). The calculation principle of the MEMS accelerometer is as follows: Figure 2 As shown:

[0054] in, ; ;

[0055] in, ; ; ;

[0056] The settlement magnetic ring 6 moves downward with the soil settlement, and produces a relative displacement with the magnetic induction device 11, which is the current depth settlement. The magnetic induction device 11 uses a Hall device to automatically conduct when sensing the magnetic field. The position of the settlement magnetic ring 6 is accurately identified by identifying the conduction position of the Hall device. At the same time, its physical position is not affected by temperature, and the magnetic induction device 11 has basically no temperature drift. The structure of the magnetic induction device 11 is shown in the figure. Figure 3 shown.

[0057] Among them, the groundwater level sensor 9 is located inside the permeable flower tube 2 (in the water body). The load water pressure will cause the deformation of the sensing membrane of the groundwater level sensor 9 (silicon pressure sensor), measure the deformation, and convert it into a digital quantity, which is transmitted to the reading device via a cable to display the measured water level value, and no calculation is required.

[0058] Among them, RTU is connected to the array displacement meter 5, magnetic induction device 11, and groundwater level sensor 9 through RS232, RS485, and switch quantity acquisition interface to realize fully transparent data transmission. RTU has built-in lithium battery and communication module to realize power supply for array displacement meter 5, magnetic induction device 11, and groundwater level sensor 9, and 4G transmits the collected data signal at the same time. The integrated power supply and network design of RTU simplifies the construction difficulty to the greatest extent and improves the beautification of the site. It can be exposed above the surface or close to the ground according to needs. By installing a protective box, subsequent equipment operation and maintenance can be realized, and generally stable power supply can be achieved for about 1-2 years.

[0059] Furthermore, the sedimentation magnetic ring 6 includes a magnetic ring body 61, an outer ring capsule 63 is attached to the outer surface of the magnetic ring body 61, and an inner ring capsule 62 is attached to the inner surface of the magnetic ring body 61. The inner ring capsule 62 and the outer ring capsule 63 are both filled with gas, and the inner ring capsule 62 and the outer ring capsule 63 are both made of expandable and contractible materials.

[0060] In addition, a micro pump 102 is fixed on the inner wall of the inclinometer tube 1. The micro pump 102 has a first inlet and a second inlet. The first inlet and the second inlet are connected to the outer ring bag 63 via a first pipeline 103, and the second inlet and the second inlet are connected to the inner ring bag 62 via a second pipeline 104.

[0061] The magnetic ring body 61 serves as a counterpart of the magnetic induction device 11 . The magnetic ring body 61 provides a magnetic field source for the magnetic induction device 11 in the inclined tube 1 to perform position detection.

[0062] The outer ring capsule 63 and the inner ring capsule 62 are attached to the outer surface and the inner surface of the magnetic ring body 61 respectively, and are both filled with gas. This allows the sedimentation magnetic ring 6 to have a certain degree of elasticity and adjustability while maintaining a certain rigidity. More specifically, the inner ring capsule 62 and the outer ring capsule 63 are made of expandable and contractible materials, which allows them to expand or contract according to changes in internal pressure. This feature allows the position of the sedimentation magnetic ring 6 to be adjusted by a micro pump 102, which is described in detail below.

[0063] The micro pump 102 is installed on the inner wall of the inclinometer tube 1 and has two inlets and outlets (a first inlet and a second inlet and outlet). By controlling the switches and flow rates of the two inlets and outlets, the micro pump 102 can adjust the internal pressures of the inner annular capsule 62 and the outer annular capsule 63 .

[0064] For example, by adjusting the inflation and deflation of the outer ring bag 63 and the inner ring bag 62, the magnetic ring body 61 can be closely attached to the outer wall of the inclinometer casing 1 or closely embedded in the side wall of the borehole 12. This embedded installation enables the magnetic ring body 61 to respond more directly to changes in the soil layer, thereby improving the accuracy of the monitoring data and the installation efficiency. Similarly, the disassembly efficiency is also greatly improved.

[0065] In this embodiment, a plurality of protrusions 101 are circumferentially spaced on the outer wall of the inclinometer tube 1. In an initial state, part of the inner surface of the inner ring capsule 62 is supported on the protrusions 101, and another part of the inner surface is embedded between adjacent protrusions 101. When the liquid in the inner ring capsule 62 is pumped into the outer ring capsule 63 by the micro pump 102, the following state exists: the inner surface of the inner ring capsule 62 is supported on the protrusions 101, and the outer surface of the outer ring capsule 63 contacts the inner wall of the borehole 12.

[0066] The protrusions 101 are distributed circumferentially at intervals on the outer wall of the inclinometer casing 1, providing initial support points for the inner ring capsule 62. In the initial state, part of the inner surface of the inner ring capsule 62 is supported on the protrusions 101, which helps to maintain a relatively stable position of the magnetic ring body 61 in the borehole 12. At the same time, the protrusions 101 also limit the excessive expansion of the inner ring capsule 62 to prevent it from getting out of control.

[0067] The inner surface of another part of the inner annular capsule 62 is embedded between adjacent protrusions 101, which provides necessary space for the expansion of the inner annular capsule 62 (increasing the storage space of the inner annular capsule 62 for gas). During implementation, the gas in the inner annular capsule 62 is pumped into the outer annular capsule 63 by the micro pump 102, realizing the redistribution of volume and pressure between the two capsules. In this process, the inner annular capsule 62 gradually shrinks, and its inner surface is only supported on the protrusion 101; while the outer annular capsule 63 gradually expands, and its outer surface is closely attached to the inner wall of the borehole 12, and then the inner annular capsule 62 further shrinks and detaches from the protrusion 101, while the outer annular capsule 63 further expands, and its outer surface is further closely attached to the inner wall of the borehole 12.

[0068] In this embodiment, a plurality of resistance increasing mechanisms 64 are distributed circumferentially at intervals on the outer surface of the outer ring bag 63, and the resistance increasing mechanism 64 includes:

[0069] A fixing plate 641, which is fixed to the outer surface of the outer ring bag 63;

[0070] A deflection plate 643, one end of which is hinged to the fixed plate 641, and a plurality of claws 644 are fixed to a side of the deflection plate 643 away from the fixed plate 641;

[0071] An elastic pad 642 is filled between the fixing plate 641 and the deflecting plate 643 .

[0072] The fixing plate 641 is fixed on the outer surface of the outer ring bag 63 as the base part of the resistance increasing mechanism 64. Its main function is to provide a stable support point to connect and support other components. The elastic pad 642 is filled between the fixing plate 641 and the deflection plate 643 and has a certain elasticity and adaptability.

[0073] The main function of the claw 644 is to embed into the soil on the side wall of the borehole 12, increase the friction between the magnetic ring body 61 and the side wall of the borehole 12, and prevent the magnetic ring body 61 from being displaced or falling off when the soil layer changes.

[0074] In this embodiment, the plug 4 is a conical structure. The plug 4 with a conical structure can fit the wall of the borehole 12 more closely, thereby improving the stability of the inclinometer casing 1.

[0075] In this embodiment, the outer surface of the water-permeable flower tube 2 is covered with a back gauze 7 , and the drilled hole 12 is filled with a backfill covering the outside of the gauze 7 .

[0076] The gauze 7 can prevent large particles of impurities in the borehole 12 from entering the water-permeable flower tube 2, thereby preventing the water level sensor 9 or other internal devices from being blocked. In addition, the borehole 12 is filled with a backfill covering the outside of the gauze 7. The selection of the backfill should take into account its stability and water permeability. Generally, a material with similar properties to the surrounding soil can be selected as the backfill to ensure that it can be closely combined with the side wall of the borehole 12 to form a stable support structure.

[0077] The groundwater-soil correlation monitoring and analysis method based on the same-hole monitoring adopts a platform to obtain groundwater level change data and soil deformation data, including the following steps:

[0078] S1. Select three areas with different degrees of land subsidence, namely high, medium and low;

[0079] S2. Deploy m platforms in each area;

[0080] S3. Continuously collect the groundwater level change data and soil deformation data monitored by the platforms in the three areas of high, medium and low for a period of time;

[0081] S4. Perform correlation analysis on the collected groundwater level change data and soil layer deformation data to obtain the Pearson correlation coefficient between groundwater level and soil layer deformation at a single measuring point ;

[0082] S5. Comprehensive comparative analysis of the correlation between the two in different regions, among which the Pearson correlation coefficient between groundwater level and soil deformation at a single measuring point is used Calculate the average value of the Pearson correlation coefficient of the three areas of high, medium and low , and then conduct a comprehensive analysis, among which,

[0083]

[0084]

[0085]

[0086] in, Indicates the first measuring points; Indicates the number of measurement points in each area of ​​high, medium and low; represents the average value of Pearson correlation coefficient in the high settlement area; represents the average value of Pearson correlation coefficient in the middle settlement area; Represents the average value of Pearson correlation coefficient in low settlement area.

[0087] Among them, the Pearson correlation coefficient between the groundwater level at a single measuring point and the soil deformation is obtained include:

[0088] 1) Establish groundwater level change and soil deformation data sets at different monitoring points;

[0089] 2) Split each data set randomly into training set, validation set and test set;

[0090] 3) Build a model based on the Pearson correlation coefficient, train the model for each training set in the three regions of high, medium and low, and then use the test set to verify the trained model.

[0091] Wherein, the model of the Pearson correlation coefficient is:

[0092]

[0093] in, Represents the groundwater level value at a single time point. It represents the average groundwater level within the entire monitoring period; Represents the soil deformation value at a single time point, It represents the average soil deformation value within the entire monitoring period; Indicates the number of data of a single measuring point.

[0094] Among them, the Pearson correlation coefficient is used to measure the correlation between two variables X and Y (groundwater level change and soil deformation). Its value is between -1 and 1. The closer it is to 1, the stronger the positive correlation is, the closer it is to -1, the stronger the negative correlation is, and the closer it is to 0, the weaker the correlation is.

[0095] The results basically show that the more serious the subsidence is, the stronger the positive correlation between the two is; when the groundwater level rises or falls rapidly, the ground subsidence rate becomes smaller or larger; the ability of groundwater to cause subsidence increases with the increase of subsidence grade; the more serious the subsidence is, the shorter the lag time is.

[0096] Among them, the Pearson correlation coefficient method is fast in calculation and does not require a large number of samples. Through the above technical solutions, the present invention can realize the quantitative analysis of the coupling changes of groundwater and land subsidence in the urban geological environment. Compared with the numerical simulation method and the large-scale satellite remote sensing data inversion method, the present invention is based on the groundwater level change and soil deformation data monitored by the same hole, which can more detailedly reflect the correlation between different settlement areas and different groundwater change processes. At the same time, based on the precise measurement point time of the perception data, the hysteresis effect period of groundwater on soil deformation can be quantitatively analyzed. The application prospects of the present invention are broad. At present, large, medium and small cities are paying more and more attention to urban geological safety. It is urgent and meaningful to study the coupling technology of groundwater and land subsidence in the urban geological environment and explore the establishment of a convenient and effective urban geological environment analysis method suitable for cities.

[0097] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A groundwater-soil correlation monitoring and analysis platform based on same-hole monitoring, which is placed in a borehole (12), and is characterized in that: The platform comprises an inclinometer tube (1), a water-permeable flower tube (2), a sedimentation tube (3), and a plug (4) which are connected in sequence from top to bottom, wherein an array displacement meter (5) and a magnetic induction device (11) are installed on the inner wall of the inclinometer tube (1), and a sedimentation magnetic ring (6) corresponding to the magnetic induction device (11) is installed on the outer wall of the inclinometer tube (1); A groundwater level sensor (9) is disposed in the middle of the water-permeable flower tube (2); a rope is connected to the top of the groundwater level sensor (9); an end of the rope away from the groundwater level sensor (9) is fixed to the top of the inclinometer tube (1); an RTU (10) is also disposed on the top of the inclinometer tube (1) for supplying power to the array displacement meter (5), the magnetic induction device (11), and the groundwater level sensor (9) and transmitting signals; The sedimentation magnetic ring (6) comprises a magnetic ring body (61), an outer ring capsule (63) is attached to the outer surface of the magnetic ring body (61), an inner ring capsule (62) is attached to the inner surface of the magnetic ring body (61), the inner ring capsule (62) and the outer ring capsule (63) are both filled with gas, and the inner ring capsule (62) and the outer ring capsule (63) are both made of expandable and contractible materials; A micro pump (102) is also fixed on the inner wall of the inclinometer tube (1), and the micro pump (102) has a first inlet and a second inlet, wherein the first inlet and the second inlet are connected to the outer annular bag (63) via a first pipeline (103), and the second inlet and the second inlet are connected to the inner annular bag (62) via a second pipeline (104); The outer wall of the inclinometer tube (1) is provided with a plurality of protrusions (101) spaced circumferentially. In an initial state, part of the inner surface of the inner ring sac (62) is supported on the protrusions (101), and another part of the inner surface is embedded between adjacent protrusions (101). When the liquid in the inner ring sac (62) is pumped into the outer ring sac (63) by using the micro pump (102), the following state exists: the inner surface of the inner ring sac (62) is supported on the protrusions (101), and the outer surface of the outer ring sac (63) contacts the inner wall of the borehole (12).

2. The underground water and soil correlation monitoring and analysis platform based on same-hole monitoring according to claim 1 is characterized in that: A plurality of resistance increasing mechanisms (64) are distributed at intervals in the circumferential direction on the outer surface of the outer ring bag (63), and the resistance increasing mechanism (64) comprises: A fixing plate (641) fixed to the outer surface of the outer ring bag (63); A deflection plate (643), one end of which is hinged to the fixing plate (641); a plurality of claws (644) are fixed to a side of the deflection plate (643) away from the fixing plate (641); An elastic pad (642) filled between the fixing plate (641) and the deflection plate (643).

3. The underground water and soil correlation monitoring and analysis platform based on same-hole monitoring according to claim 1 is characterized in that: The plug (4) is a conical structure.

4. The underground water and soil correlation monitoring and analysis platform based on same-hole monitoring according to claim 1 is characterized in that: The outer surface of the water-permeable flower tube (2) is covered with a back gauze (7), and the drilled hole (12) is filled with a backfill material covering the outside of the gauze (7).

5. A groundwater-soil correlation monitoring and analysis method based on same-hole monitoring, which uses the platform described in any one of claims 1 to 4 to obtain groundwater level change data and soil layer deformation data, characterized in that: The steps include: S1. Select three areas with different degrees of land subsidence, namely high, medium and low; S2. Deploy m platforms in each area; S3. Continuously collect the groundwater level change data and soil deformation data monitored by the platforms in the three areas of high, medium and low for a period of time; S4. Perform correlation analysis on the collected groundwater level change data and soil layer deformation data to obtain the Pearson correlation coefficient between groundwater level and soil layer deformation at a single measuring point ; S5. Comprehensive comparative analysis of the correlation between the two in different regions, among which the Pearson correlation coefficient between groundwater level and soil deformation at a single measuring point is used Calculate the average value of the Pearson correlation coefficient of the three areas of high, medium and low , and then conduct a comprehensive analysis, among which, ； ； ； in, Indicates the first measuring points; Indicates the number of measurement points in each area of ​​high, medium and low; represents the average value of Pearson correlation coefficient in the high settlement area; represents the average value of Pearson correlation coefficient in the middle settlement area; Represents the average value of Pearson correlation coefficient in low settlement area.

6. The underground water-soil correlation monitoring and analysis method based on same-hole monitoring according to claim 5 is characterized in that: Obtain the Pearson correlation coefficient between groundwater level and soil deformation at a single measuring point include: 1) Establish groundwater level change and soil deformation data sets at different monitoring points; 2) Split each data set randomly into training set, validation set and test set; 3) Build a model based on the Pearson correlation coefficient, train the model for each training set in the three regions of high, medium and low, and then use the test set to verify the trained model.

7. The underground water-soil correlation monitoring and analysis method based on same-hole monitoring according to claim 6 is characterized by: The model of the Pearson correlation coefficient is: ； in, Represents the groundwater level value at a single time point. It represents the average groundwater level within the entire monitoring period; Represents the soil deformation value at a single time point, It represents the average soil deformation value within the entire monitoring period; Indicates the number of data of a single measuring point.

Images