CN107101624B - Geological deformation three-dimensional observation system, installation and embedding method and measurement method thereof - Google Patents
Geological deformation three-dimensional observation system, installation and embedding method and measurement method thereof Download PDFInfo
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 22
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Abstract
The invention discloses a geological deformation three-dimensional observation system, an installation and embedding method thereof and a geological internal deformation measurement method realized based on the geological deformation three-dimensional observation system. The three-dimensional observation system comprises a three-dimensional positive and negative bidirectional inertial sensing detection system arranged underground, a GNSS observation station arranged on the ground and an information acquisition system. The three-dimensional positive and negative bidirectional inertial sensing detection system comprises a plurality of MEMS sensors which are connected end to end and are arranged in a PVC straight pipe along the axis of the PVC straight pipe, the PVC straight pipe is arranged in a drilling hole, cement slurry is poured into the drilling hole and the PVC straight pipe, and the cement slurry is solidified. The MEMS sensor includes a pair of inertial sensors disposed in opposite directions on the X, Y, Z axis, respectively. The GNSS observation station is placed at the borehole orifice and coaxial with the PVC straight pipe. The invention solves the problem of distortion of the monitoring result caused by abnormality of individual monitoring points in the existing fixed inclinometer system, and ensures that the monitoring result is closer to the actual geological deformation condition.
Description
Technical Field
The invention relates to a three-dimensional observation system for geological deformation, an installation and embedding method of the three-dimensional observation system for geological deformation, and a geological internal deformation measurement method realized based on the three-dimensional observation system for geological deformation, belonging to the field of geological deformation monitoring of geotechnical engineering.
Background
Deformation monitoring for geotechnical engineering includes surface displacement observation and internal displacement observation. The deformation monitoring mainly comprises the steps of observing horizontal displacement and vertical displacement, mastering a change rule and researching the trend of crack, landslide, sliding and overturning. Common internal displacement observation instruments include displacement meters, seam meters, inclinometers, sedimentation meters, fixed inclinometers, plumb line coordinatometers, tension line meters, multi-point displacement meters, strain gauges, and the like. The surface displacement observation instrument comprises a level gauge, a total station, a GPS, a three-dimensional laser scanning technology and the like.
With the rapid development of science and technology, the safety monitoring technology is also continuously perfected and improved in the fields of water conservancy and hydropower, highways, railways, civil aviation and the like. At present, in the aspect of foundations such as dams, groves, slopes, highways and railways in hydraulic engineering, civil aviation airport foundations and the like which relate to deformation control, settlement monitoring is generally performed in a single-point (settlement plates and settlement rings) and distributed (fixed inclinometers and settlement meters) mode.
Currently, the use of MEMS-related deformation instruments, such as fixed inclinometers, for deformation monitoring has become a development trend in the art, but at present, they are only applied to geotechnical engineering slopes. Referring to fig. 1 and 2, typically, a number of stationary inclinometers 91 mounted MEMS (micro-electromechanical system) inertial sensors 92 are connected by rigid connection rods 93. During measurement, the fixed inclinometers 91 connected end to end are placed in the geology to be measured, and as shown in fig. 2, the MEMS inertial sensor 92 on each fixed inclinometer 91 is used as a monitoring point. When observing the deformation in the geology, the MEMS inertial sensor 92 at the beginning or the end is taken as a starting point, and the absolute deformation of each monitoring point can be calculated by obtaining the absolute two-dimensional deformation value of the monitoring point at the beginning or the end, so that the accumulated calculation of the deformation is carried out, and finally, the calculated sedimentation result is the relative two-dimensional deformation value relative to the monitoring point at the beginning or the end.
As can be seen from practical implementation, the geological internal deformation observation method realized by the fixed inclinometer system has the following defects: firstly, the deformation and deformation trend obtained by the monitoring points of the individual fixed inclinometers are greatly different from the actual geological deformation condition under the influence of geological interfaces (faults and broken bands). Referring to fig. 2, reference numeral 102 shows an actual geological interface, where the deformation trend line 101 obtained by each fixed inclinometer 91 is greatly different from the actual deformation of the geology. Secondly, the fixed inclinometer system can only realize two-dimensional deformation observation, has low measurement accuracy and systematic errors, and the error values can be accumulated continuously along with the deformation accumulation calculation process, so that the final result is distorted.
Disclosure of Invention
The invention aims to provide a geological deformation three-dimensional observation system, an installation and embedding method of the geological deformation three-dimensional observation system and a geological internal deformation measurement method realized based on the geological deformation three-dimensional observation system, which solve the problem that the monitoring result is distorted due to the abnormality of individual monitoring points of the existing fixed inclinometer system, and ensure that the monitoring result is closer to the actual geological deformation condition.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a three-dimensional observation system for geological deformation, which is characterized in that: the system comprises a three-dimensional positive and negative bidirectional inertial sensing detection system arranged underground, a GNSS observation station arranged on the ground and an information acquisition system; the three-dimensional positive and negative bidirectional inertial sensing detection system and the GNSS observation station are respectively connected with the information acquisition system through cables; the three-dimensional positive and negative bidirectional inertial sensing detection system comprises a plurality of MEMS sensors which are connected end to end and are arranged in a PVC straight pipe along the axis of the PVC straight pipe, wherein the PVC straight pipe is arranged in a drilling hole, cement slurry is poured into the drilling hole and the PVC straight pipe, and the cement slurry is solidified; the MEMS sensor comprises a pair of inertial sensors which are respectively arranged on the X, Y, Z shaft in a positive and negative two-way; the axis of the PVC straight pipe is defined as a Z axis, and an X axis and a Y axis which are mutually perpendicular are defined in a plane perpendicular to the Z axis; the GNSS observation station is placed at the borehole orifice and coaxial with the PVC straight pipe.
The MEMS sensor comprises a signal processing controller which is connected with all the inertial sensors.
The information acquisition system comprises a signal acquisition module, a GNSS signal receiving module and a receiving and transmitting antenna, wherein: the signal acquisition module is used for being connected with a cable of the three-dimensional positive and negative bidirectional inertial sensing detection system extending out of the geological surface, the GNSS signal receiving module is connected with the GNSS observation station, and the receiving and transmitting antenna is connected with the signal acquisition module and the GNSS signal receiving module.
The GNSS observation station is also in wireless communication with the GNSS reference station through a GNSS antenna, so that the GNSS observation station obtains X, Y, Z axis deformation of the position of the GNSS observation station under a three-dimensional coordinate system from the GNSS reference station.
The ground is provided with an information management system which can be in wireless communication with the information acquisition system, and the information management system comprises a communication module, a deformation analysis module and a data storage module.
The method for installing and burying the geological deformation three-dimensional observation system is characterized by comprising the following steps of:
1) The MEMS sensors are connected and assembled end to end through signal wires;
2) Drilling holes in a geological structure to be observed;
3) Lowering the PVC straight pipe into the drilled hole;
4) All the MEMS sensors which are connected end to end are placed in the PVC straight pipe, so that all the MEMS sensors form a straight line coaxial with the axis of the PVC straight pipe;
5) Injecting cement slurry into the drill hole and the PVC straight pipe until the cement slurry is full of overflow;
6) After the cement slurry is solidified, installing the GNSS observation station at a drilling hole opening to ensure that the GNSS observation station is coaxial with the PVC straight pipe;
7) Installing the information acquisition system on the ground;
8) The method includes connecting a cable extending to the ground from the MEMS sensor proximate to the geological surface to the information acquisition system, and connecting the GNSS observation station to the information acquisition system via the cable.
The geological internal deformation measuring method realized based on the geological deformation three-dimensional observation system is characterized by comprising the following steps of:
1) Each MEMS sensor is used as a monitoring point, and each monitoring point obtains X, Y, Z shaft deformation through three pairs of inertial sensors which are arranged on a X, Y, Z shaft in a forward and reverse bidirectional manner;
2) Starting to collect X, Y, Z shaft deformation of each monitoring point one by taking the monitoring point closest to the geological surface or the monitoring point farthest from the geological surface as a starting point;
3) The GNSS observation station is used as an observation point to acquire X, Y, Z axis deformation of the position of the GNSS observation station from the GNSS reference station;
4) Aiming at the observation points and all the monitoring points, accumulating and calculating and fitting a X, Y, Z-axis absolute deformation curve reflecting the position of the three-dimensional positive and negative bidirectional inertial sensing detection system;
5) And according to the X, Y, Z axis absolute deformation curve, accumulating and calculating under a three-dimensional coordinate system and fitting to obtain the geological internal absolute deformation form reflecting the position of the three-dimensional positive and negative bidirectional inertial sensing detection system.
The invention has the advantages that:
the invention realizes the comprehensive monitoring of the deformation trend in the geology from the three-dimensional view, has high measurement precision and small error, can effectively prevent the occurrence of abnormal phenomena of abrupt increase or abrupt decrease of individual monitoring points caused by geological interface factors, and the monitoring result is the absolute deformation under the three-dimensional coordinates, thus truly, intuitively and accurately reflecting the actual deformation condition in the geology, thereby providing scientific basis and reliable technical support for checking design and construction guidance.
The three-dimensional observation system can be continuously and distributively applied to geological internal deformation monitoring occasions in the aspects of dams, slopes, caverns, wide roadbeds, site foundations and the like.
Drawings
FIG. 1 is a schematic installation view of a prior art fixed inclinometer system.
FIG. 2 is an illustration of the use of a prior art fixed inclinometer system.
FIG. 3 is a schematic diagram of a preferred embodiment of the geological deformation three-dimensional observation system of the present invention.
Fig. 4 is a schematic diagram of the composition of the information management system.
Fig. 5 is a schematic diagram of the composition of a GNSS reference station.
Detailed Description
As shown in FIG. 3, the three-dimensional observation system for geological deformation of the present invention comprises a three-dimensional positive and negative bi-directional inertial sensing detection system placed underground (i.e. inside the geology), a GNSS observation station 60 placed on the ground and an information acquisition system 30; the three-dimensional positive and negative two-way inertial sensing detection system and the GNSS observation station 60 are respectively connected with the information acquisition system 30 through cables. The three-dimensional positive and negative bidirectional inertial sensing detection system comprises a plurality of MEMS sensors 10 which are connected end to end and are arranged in a PVC straight pipe 20 along the axis of the PVC straight pipe 20, namely, the straight line formed by each MEMS sensor 10 (regarded as a monitoring point) which is connected end to end is coaxial with the axis of the PVC straight pipe 20, the PVC straight pipe 20 is arranged in a drilling hole 50 drilled on a geological structure to be observed, cement slurry is filled in the drilling hole 50 and the PVC straight pipe 20, and the cement slurry is solidified, wherein: the MEMS sensor 10 includes a pair of inertial sensors disposed in both directions on the X, Y, Z axis, that is, a pair of inertial sensors 12 and 13 disposed in opposite directions on the X axis in the positive and negative directions of the X axis, a pair of inertial sensors 14 and 15 disposed in opposite directions on the Y axis in the positive and negative directions of the Y axis, and a pair of inertial sensors 16 and 17 disposed in opposite directions on the Z axis in the positive and negative directions of the Z axis. In each pair of inertial sensors, one measures in the positive direction of the axis (X, Y or Z axis) and the other measures in the negative direction of the same axis (X, Y or Z axis). The GNSS observation station 60 is placed at the aperture of the borehole 50 and coaxial with the PVC straight pipe 20. Typically, the PVC straight pipe 20 is disposed coaxially with the borehole 50, and thus the GNSS observatory 60 is also disposed coaxially with the borehole 50.
In the present invention, the axis (central axis) of the PVC straight pipe 20 is defined as a Z-axis, and the plane perpendicular to the Z-axis is defined with an X-axis and a Y-axis perpendicular to each other, and X, Y and the Z-axis together form a three-dimensional coordinate system.
In the present invention, the axis of the PVC straight pipe 20 may be perpendicular to the geological surface 40, may be inclined to the geological surface 40, and may even be parallel to the geological surface 40.
The main functions of the PVC straight pipe 20 are: first, it is easy for each MEMS sensor 10 to be sequentially lowered into the PVC straight pipe 20 while keeping all the MEMS sensors 10 in a straight line state integrally with each other; second, a good protection is provided to the MEMS sensor 10.
In practical manufacturing, the PVC straight pipe 20 may be formed by splicing a plurality of PVC short pipes, and may be made of other materials, without limitation.
In the invention, on the premise that the inertial sensors are not interfered, the installation positions of the three pairs of inertial sensors, which are arranged on the X, Y, Z shaft in a positive and negative bidirectional manner, on the MEMS sensor 10 can be flexibly designed, and the invention is not limited. Fig. 3 shows a case where an inertial sensor that measures in a positive direction of X, Y, Z axis is mounted on top of the MEMS sensor 10 and an inertial sensor that measures in a negative direction of X, Y, Z axis is mounted on the bottom of the MEMS sensor 10.
In a practical design, the MEMS sensor 10 includes a signal processing controller 11, and signal ports of the inertial sensors 12 to 17 are respectively connected to corresponding signal ports of the signal processing controller 11.
In a practical design, the information acquisition system 30 may include a signal acquisition module 33, a GNSS signal receiving module 34, and a transceiver antenna 31, where: the signal acquisition module 33 is connected to a cable extending from the geological surface 40 through the three-dimensional positive and negative bidirectional inertial sensing system, the GNSS signal receiving module 34 is connected to the GNSS observation station 60, and the transceiver antenna 31 is connected to the signal acquisition module 33 and the GNSS signal receiving module 34. The information acquisition system 30 is further provided with a power module 32 for providing power.
Specifically, in the three-dimensional positive and negative bidirectional inertial sensing detection system, the MEMS sensors 10 are connected by cables led out from the signal processing controller 11, and the cable of the signal processing controller 11 of the MEMS sensor 10 closest to the geological surface 40 extending out of the geological surface 40 is connected to the corresponding signal port of the signal acquisition module 33 of the information acquisition system 30.
As shown in fig. 3 and fig. 5, the GNSS observation station 60 and the GNSS reference station 80 perform wireless communication through a GNSS antenna, so that the GNSS observation station 60 (regarded as an observation point) obtains a X, Y, Z axis deformation amount of the position of the GNSS observation station 80 under a three-dimensional coordinate system from the GNSS reference station 80, wherein the GNSS reference station 80 is installed at a geographic position capable of providing stable and reliable reference coordinates, and the three-dimensional coordinate axis definition of the GNSS observation station 60 is consistent with the three-dimensional coordinate axis definition of the MEMS sensor 10, that is, X, Y, Z axes defined by the GNSS observation station 60 are identical with X, Y, Z axes defined by the MEMS sensor 10.
In the present invention, as in FIG. 1, a GNSS observatory 60 comprises a GNSS antenna 61, a GNSS receiver 63 and a power supply 62. As shown in fig. 5, the GNSS reference station 80 includes a GNSS antenna 81, a GNSS receiver 83, a differential station 82, and a power supply 84.
The GNSS observatory 60 and the GNSS reference station 80 are known in the art, and how the GNSS observatory 60 obtains the geographic position information in the three-dimensional coordinate system from the GNSS reference station 80 is not described in detail herein.
As shown in fig. 4, the ground is further provided with an information management system 70 capable of wirelessly communicating with the information acquisition system 30, and the information management system 70 may include a communication module 71, a deformation analysis module 72, and a data storage module 73, wherein: the signal ports of the communication module 71 and the data storage module 73 are respectively connected with the corresponding signal ports of the deformation analysis module 72, and the communication module 71 is used for wireless communication with the transceiver antenna 31 of the information acquisition system 30.
In practical designs, the information management system 70 may further include an information reorganizing module 74, a chart display and query module 75, a printing module 76, and a GNSS reorganizing module 77.
The configuration of the information management system 70 may be varied and is not limited.
The invention also provides an installation and embedding method for the geological deformation three-dimensional observation system design, which comprises the following steps:
1) According to the number of the MEMS sensors 10 required by actual observation, all the MEMS sensors 10 are assembled in an end-to-end mode through signal lines;
2) Drilling holes on a geological structure to be observed through a drilling machine, wherein the hole diameter is suitable for just accommodating the PVC straight pipe 20, and then cleaning the hole wall;
3) Lowering the PVC straight pipe 20 into the borehole 50;
4) Sequentially lowering all the MEMS sensors 10 (a series of MEMS sensors) which are connected end to end into a PVC straight pipe 20, wherein the pipe diameter of the PVC straight pipe 20 is proper to just accommodate the MEMS sensors 10, so that all the MEMS sensors 10 form a straight line coaxial with the axis of the PVC straight pipe 20;
5) Grouting cement slurry into the drill hole 50 and the PVC straight pipe 20 through grouting equipment until the cement slurry is fully overflowed;
6) After the cement slurry has set (typically taking a week), the GNSS observation station 60 is installed at the aperture of the borehole 50, ensuring that the GNSS observation station 60 is coaxial with the PVC straight pipe 20, in other words, the GNSS observation station 60 is installed at the aperture location of the geological surface 40 (fig. 3 only shows the GNSS observation station 60 schematically, so the GNSS observation station 60 is not drawn on the geological surface);
7) Installing an information acquisition system 30 on the ground;
8) The concrete guard boxes are fabricated from concrete forms, the guard boxes being sized slightly larger than the information acquisition system 30 to facilitate cable connections such as signal and power lines, the cables extending to the ground from the MEMS sensor 10 closest to the geological surface 40 being connected to the information acquisition system 30 through the guard boxes, and the GNSS observatory 60 being connected to the information acquisition system 30 through the cables.
In actual construction, the information management system 70 and the GNSS reference station 80 are installed on the ground, and then each system is debugged, and joint debugging between each system is performed, and initial observation data, reference data, and the like are set for subsequent observation.
When the observation system is used for observation, the power supply of each system is started, and the normal power supply is ensured.
The observation frequency of the three-dimensional positive and negative bidirectional inertial sensing detection system is set through the information management system 70, and then the operation can be started.
The three-dimensional positive and negative bidirectional inertial sensing detection system and the GNSS observation station 60 detect X, Y, Z triaxial deformation at each acquisition time according to set observation frequency, then the MEMS sensors 10 and the GNSS observation station 60 transmit the obtained data to the information acquisition system 30, the information acquisition system 30 transmits the data to the information management system 70 through the receiving and transmitting antenna 31, and finally the information management system 70 calculates the actual geological deformation condition occurring at each acquisition time and within a set time period in the geological interior, and synchronously displays the results such as absolute deformation trend curves.
In actual analysis, the observation system of the invention can be also provided with a secondary instrument to compare the system acquisition data with the manual reading data.
Based on the geological deformation three-dimensional observation system, the invention also provides a geological internal deformation measurement method, which comprises the following steps:
1) Each MEMS sensor 10 is used as a monitoring point, and based on a forward and reverse trend function method, each monitoring point respectively obtains X, Y, Z shaft deformation of the position of each monitoring point through three pairs of inertial sensors which are arranged on a X, Y, Z shaft in forward and reverse directions;
2) Starting to collect X, Y, Z shaft deformation of each monitoring point one by taking the monitoring point closest to the geological surface 40 or the monitoring point farthest from the geological surface 40 as a starting point;
3) The GNSS observation station 60 obtains X, Y, Z axis deformation of the position of the GNSS observation station 60 as the observation point from the three-dimensional geographical position information provided by the GNSS reference station 80, and the X, Y, Z axis deformation obtained by the GNSS observation station 60 represents the deformation value of the geological surface of the GNSS observation station;
4) Aiming at the observation points and all the monitoring points, accumulating and calculating and fitting a X, Y, Z-axis absolute deformation curve reflecting the position of the three-dimensional positive and negative bidirectional inertial sensing detection system;
5) According to the X, Y, Z axis absolute deformation curve, accumulating and calculating under a three-dimensional coordinate system and fitting to obtain the geological internal absolute deformation form reflecting the position of the three-dimensional positive and negative bidirectional inertial sensing detection system, so as to truly reflect the displacement of the geological internal.
In other words, each geological internal absolute deformation curve is obtained by coupling the relative deformation obtained based on the monitoring point at the same acquisition time with the earth surface deformation obtained based on the observation point, and compared with the relative deformation, the absolute deformation can more directly display the geological internal deformation condition of the position to be observed aiming at the actual geographic azimuth.
The invention has the advantages that:
the invention realizes the comprehensive monitoring of the deformation trend in the geology from the three-dimensional view, has high measurement precision and small error, can effectively prevent the occurrence of abnormal phenomena of abrupt increase or abrupt decrease of individual monitoring points caused by geological interface factors, and the monitoring result is the absolute deformation under the three-dimensional coordinates, thus truly, intuitively and accurately reflecting the actual deformation condition in the geology, thereby providing scientific basis and reliable technical support for checking design and construction guidance.
The foregoing is a description of the preferred embodiments of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any modifications, equivalent changes, simple substitutions and the like based on the technical scheme of the present invention can be made without departing from the spirit and scope of the present invention.
Claims (6)
1. A three-dimensional observation system for geological deformation, which is characterized in that: the system comprises a three-dimensional positive and negative bidirectional inertial sensing detection system arranged underground, a GNSS observation station arranged on the ground and an information acquisition system; the three-dimensional positive and negative bidirectional inertial sensing detection system and the GNSS observation station are respectively connected with the information acquisition system through cables; the three-dimensional positive and negative bidirectional inertial sensing detection system comprises a plurality of MEMS sensors which are connected end to end and are arranged in the PVC straight pipe along the axis of the PVC straight pipe, each MEMS sensor is used as a monitoring point, the PVC straight pipe is arranged in a drilling hole, cement slurry is poured into the drilling hole and the PVC straight pipe, and the cement slurry is solidified; the MEMS sensor comprises a pair of inertial sensors which are respectively arranged on the X, Y, Z shaft in a positive and negative two-way; the axis of the PVC straight pipe is defined as a Z axis, and an X axis and a Y axis which are mutually perpendicular are defined in a plane perpendicular to the Z axis; the GNSS observation station is arranged at the hole opening of the drill hole and is coaxial with the PVC straight pipe; the GNSS observation station and the GNSS reference station are in wireless communication through the GNSS antenna, so that the GNSS observation station can be used as an observation point to acquire X, Y, Z axis deformation of the position of the GNSS observation station under a three-dimensional coordinate system from the GNSS reference station, and the three-dimensional coordinate axis definition of the GNSS observation station is consistent with that of the MEMS sensor.
2. The geological deformation three-dimensional observation system of claim 1, wherein:
the MEMS sensor comprises a signal processing controller which is connected with all the inertial sensors.
3. The geological deformation three-dimensional observation system of claim 1, wherein:
the information acquisition system comprises a signal acquisition module, a GNSS signal receiving module and a receiving and transmitting antenna, wherein: the signal acquisition module is used for being connected with a cable of the three-dimensional positive and negative bidirectional inertial sensing detection system extending out of the geological surface, the GNSS signal receiving module is connected with the GNSS observation station, and the receiving and transmitting antenna is connected with the signal acquisition module and the GNSS signal receiving module.
4. A geological deformation three-dimensional observation system according to any one of claims 1 to 3, wherein:
the ground is provided with an information management system which can be in wireless communication with the information acquisition system, and the information management system comprises a communication module, a deformation analysis module and a data storage module.
5. A method of installing and burying a geological deformation three-dimensional observation system according to any one of claims 1 to 4, comprising the steps of:
1) The MEMS sensors are connected and assembled end to end through signal wires;
2) Drilling holes in a geological structure to be observed;
3) Lowering the PVC straight pipe into the drilled hole;
4) All the MEMS sensors which are connected end to end are placed in the PVC straight pipe, so that all the MEMS sensors form a straight line coaxial with the axis of the PVC straight pipe;
5) Injecting cement slurry into the drill hole and the PVC straight pipe until the cement slurry is full of overflow;
6) After the cement slurry is solidified, installing the GNSS observation station at a drilling hole opening to ensure that the GNSS observation station is coaxial with the PVC straight pipe;
7) Installing the information acquisition system on the ground;
8) A cable extending to the ground from the MEMS sensor closest to the geological surface is connected to the information acquisition system, and the GNSS observation station is connected to the information acquisition system by a cable.
6. A geological internal deformation measurement method implemented based on the geological deformation three-dimensional observation system according to any one of claims 1 to 4, characterized in that it comprises the following steps:
1) Each MEMS sensor is used as a monitoring point, and each monitoring point obtains X, Y, Z shaft deformation through three pairs of inertial sensors which are arranged on a X, Y, Z shaft in a forward and reverse bidirectional manner;
2) Starting to collect X, Y, Z shaft deformation of each monitoring point one by taking the monitoring point closest to the geological surface or the monitoring point farthest from the geological surface as a starting point;
3) The GNSS observation station is used as an observation point to acquire X, Y, Z axis deformation of the position of the GNSS observation station from the GNSS reference station;
4) Aiming at the observation points and all the monitoring points, accumulating and calculating and fitting a X, Y, Z-axis absolute deformation curve reflecting the position of the three-dimensional positive and negative bidirectional inertial sensing detection system;
5) And according to the X, Y, Z axis absolute deformation curve, accumulating and calculating under a three-dimensional coordinate system and fitting to obtain the geological internal absolute deformation form reflecting the position of the three-dimensional positive and negative bidirectional inertial sensing detection system.
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| CN113465523B (en) * | 2021-05-14 | 2022-03-15 | 中国地质大学（武汉） | Landslide underwater net type three-dimensional deformation monitoring system and method |
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