CN115523859A

CN115523859A - Reservoir dam safety monitoring multi-instrument combined observation early warning system and method

Info

Publication number: CN115523859A
Application number: CN202211181433.2A
Authority: CN
Inventors: 袁明道; 李培聪; 徐云乾; 史永胜; 祝二浩; 朱泽文
Original assignee: Guangdong Research Institute of Water Resources and Hydropower
Current assignee: Guangdong Research Institute of Water Resources and Hydropower
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-12-27

Abstract

The invention discloses a reservoir dam safety monitoring multi-instrument combined observation early warning system and a method, wherein the system comprises: the monitoring net is used for monitoring the displacement of the reservoir dam and is arranged on the reservoir dam of the dam, and comprises a full measuring point, a GM measuring point and an MEMS measuring point; wherein, the total measuring points are used as control points in the monitoring network, the GM measuring points are used as supplementary control points, and the MEMS measuring points are used as encryption points; and the data processing module is used for acquiring monitoring data acquired by the full measuring points, the GM measuring points and the MEMS measuring points, processing the monitoring data to acquire a displacement field of the monitoring network, and realizing dam deformation early warning according to the displacement field. According to the invention, the full-scale measuring points, the GM measuring points and the MEMS measuring points are arranged on the dam, and the deformation of the surface of the dam is continuously monitored by using multiple instruments, so that the deformation of the surface of the reservoir dam can be effectively monitored and early-warning is carried out in time, and the continuity, the accuracy and the reliability of monitoring are improved. The invention can be widely applied to the technical field of hydraulic engineering displacement monitoring.

Description

Reservoir dam safety monitoring multi-instrument combined observation early warning system and method

Technical Field

The invention relates to the technical field of hydraulic engineering displacement monitoring, in particular to a reservoir dam safety monitoring multi-instrument combined observation early warning system and method.

Background

The problem of reservoir displacement deformation monitoring is one of important links of reservoir dam safe operation, and the conventional monitoring method at present is to manually obtain surface displacement information by using a total station measuring instrument or obtain internal deformation conditions by methods such as a settlement instrument, a tension lead, a forward and reverse perpendicular line and the like. However, the above methods are difficult to meet the requirements of density and frequency of monitoring, the requirements on operators are high, part of local mobile measurement is inconvenient, and certain monitoring limits exist in time and space, so that the existing displacement monitoring of the reservoir dam still exists: 1. the displacement condition of the reservoir dam cannot be found in time; 2. the condition of the whole displacement field of the dam cannot be monitored. In summary, the problems of the related art need to be solved.

Disclosure of Invention

In order to solve at least one of the technical problems in the prior art to a certain extent, the invention aims to provide a reservoir dam safety monitoring multi-instrument combined observation and early warning system and method.

The technical scheme adopted by the invention is as follows:

the utility model provides a reservoir dam safety monitoring multi-instrument jointly observes early warning system, includes:

the monitoring net is used for monitoring the displacement of the reservoir dam and arranged on the reservoir dam of the dam, and comprises a total measuring point, a GM measuring point and an MEMS measuring point; wherein, the total measuring points are used as control points in the monitoring network, the GM measuring points are used as supplementary control points, and the MEMS measuring points are used as encryption points;

and the data processing module is used for acquiring monitoring data acquired by the total measuring points, the GM measuring points and the MEMS measuring points, processing the monitoring data to acquire a displacement field of the monitoring network, and realizing dam deformation early warning according to the displacement field.

Furthermore, the monitoring net is arranged in a quadrilateral mesh mode or a triangular mesh mode.

Further, the full-measurement points are used for acquiring real coordinates and displacements of monitoring points in real time, in a medium-short term and in a long term;

the GM measuring point is used for acquiring the coordinates and the displacement of the monitoring point in real time and in a medium-short period;

and the MEMS measuring points are used as monitoring net encryption points and used for acquiring relative displacement and relative coordinates between the monitoring points.

Furthermore, the MEMS measuring point only comprises an MEMS sensor, data acquired by the MEMS sensor are passive measured values, the MEMS sensor works in a relative positioning mode, the dynamic characteristic is good, but the MEMS sensor lacks an absolute position and has no time information, and the recursion accumulated error is serious;

and (3) preliminarily forming a dam real-time displacement field by combining the displacement calculated based on the data acquired by the MEMS measuring points and the analysis of the whole deformation rule of the dam.

Furthermore, the GM measuring point comprises an MEMS sensor and GNSS equipment, data collected by the GNSS equipment are active measuring values, the work is carried out in an absolute positioning mode, the error accumulation is small, position information and time information are provided, the position information and the time information are easily influenced by the environment, and the dynamic response is delayed;

and calculating the displacement of any monitoring point in the monitoring network based on the absolute coordinates and displacement values acquired by the GM measuring point.

Further, the total measuring points comprise MEMS sensors, GNSS equipment, target prisms and total stations; the total station works in an absolute positioning mode, does not have error accumulation, provides high-precision position information and time information, and has serious monitoring lag;

and correcting and determining the whole deformation trend of the dam based on the measured values obtained by the full measuring points, and calculating the displacement field and the deformation trend of the whole dam by combining all the monitoring points of the whole monitoring network.

The invention adopts another technical scheme that:

a reservoir dam safety monitoring multi-instrument combined observation early warning method comprises the following steps:

establishing a monitoring network for monitoring the displacement of the reservoir dam; the monitoring network comprises a full measuring point, a GM measuring point and an MEMS measuring point;

according to data collected by MEMS measuring points, the displacement of the monitoring points is calculated, and a dam real-time displacement field is preliminarily formed by combining the analysis of the whole deformation rule of the dam;

acquiring absolute coordinates and displacement values of monitoring points by a GM measuring point, and calculating to obtain a medium-short term displacement field of the dam in combination with the relative positioning of the MEMS measuring point;

and correcting and determining the whole deformation trend of the dam through the total measuring points, calculating the whole displacement field of the dam by combining all the monitoring points, and obtaining the displacement field according to calculation to realize dam deformation early warning.

Further, the establishment of a monitoring net for monitoring the displacement of the reservoir dam comprises:

dividing the dam engineering area into a plurality of monitoring areas, wherein the monitoring areas comprise geological complex areas, engineering connection areas and engineering abnormal areas; each area is distributed along the axis of the dam in a band shape, various monitoring points are arranged along the central axis and the side line of the area, a key area adopts a full measuring point or a GM measuring point, and the monitoring points are connected to form a monitoring network;

if the distances between the total measuring points and the GM measuring points are too far, the monitoring network is encrypted through the MEMS measuring points.

Furthermore, the monitoring net is arranged in a quadrilateral mesh mode or in a triangular mesh mode.

Further, according to the absolute coordinates and displacement values of the monitoring points acquired by the GM measuring point, the displacements of other monitoring points are calculated by the following formula:

μ＝[N][μ] _node

in the formula, μ represents the displacement of the point to be determined, [ N ]]Letter of presentation shapeNumber (adapted to the shape of the control net), [ mu ] m] _node Representing control point displacement vectors.

The invention has the beneficial effects that: according to the invention, the full-scale measuring points, the GM measuring points and the MEMS measuring points are arranged on the dam, and the deformation of the surface of the dam is continuously monitored by using multiple instruments, so that the deformation of the surface of the reservoir dam can be effectively monitored and early-warning is carried out in time, and the continuity, the accuracy and the reliability of monitoring are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present invention or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a monitoring network layout of a quadrilateral mesh in an embodiment of the invention;

FIG. 2 is a schematic view of a monitoring network layout of a triangular mesh in an embodiment of the present invention;

fig. 3 is a flow chart of a reservoir dam safety monitoring multi-instrument combined observation early warning method in the embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Interpretation of terms:

measuring points in total amount: the system comprises MEMS sensors (micro electro mechanical systems), GNSS equipment, target prisms and other equipment, and can acquire real coordinates and displacement measuring points in real time, in short and medium periods and in long-term operation of a dam;

GM measuring point: the system comprises an MEMS sensor (micro electro mechanical system) and GNSS equipment which can acquire real-time, medium-short term measuring point coordinates and displacement measuring points;

measuring points of MEMS: comprises an MEMS sensor (micro electro mechanical system) as an encryption point of a monitoring network to acquire displacement and relative coordinates

Target prism: a distance measuring device using a reflecting prism (or a reflecting sheet) as a reflector, wherein the prism receives and reflects an optical signal emitted by a total station. The total station calculates the distance to the reflecting prism using optical principles.

Total station: the Total Station type Electronic distance measuring instrument (Electronic Total Station) is a high-tech measuring instrument integrating light collection, mechanical measurement and electrical measurement, and is a surveying instrument system integrating horizontal angle, vertical angle, distance (slant distance, horizontal distance) and height difference measurement functions.

As shown in fig. 1 and fig. 2, the embodiment provides a reservoir dam safety monitoring multi-instrument combined observation and early warning system, which can effectively improve the monitoring precision of reservoir dam bank slope stability, and is beneficial to timely discovering abnormalities and reducing dangerous cases.

The system comprises:

the monitoring net is used for monitoring the displacement of the reservoir dam and is arranged on the reservoir dam of the dam, and comprises a full measuring point, a GM measuring point and an MEMS measuring point; wherein, the total measuring points are used as control points in the monitoring network, the GM measuring points are used as supplementary control points, and the MEMS measuring points are used as encryption points;

The system needs to arrange monitoring points on a reservoir dam in advance to form a monitoring network. In particular, the monitoring net may be arranged in a quadrilateral mesh, as shown in fig. 1. The monitoring net can also be arranged in a triangular grid manner, as shown in fig. 2.

As an optional implementation mode, the arrangement method of the monitoring net comprises the following steps A1-A2:

a1, an integral arrangement mode is adopted, a dam engineering area is divided into a plurality of monitoring areas, wherein the monitoring areas comprise a geological complex area, an engineering connection area and an engineering abnormal area, the areas are distributed in a belt shape along the axis of the dam as much as possible, various measuring points are arranged along the central axis and the side line of the area, a key area adopts full measuring points or GM measuring points, the monitoring points are connected with one another to form a monitoring net, the various monitoring points can be connected with one another, and the monitoring net comprises a triangular net and a quadrilateral net.

And A2, an encryption arrangement mode is adopted, and if the distances between the full-scale measuring points and the GM measuring points are too far, the monitoring network can be encrypted through the MEMS measuring points.

Further as an optional implementation manner, the equipment arranged at the monitoring points of the monitoring network comprises displacement deformation monitoring equipment such as an MEMS sensor (micro-electro-mechanical system), GNSS equipment, a target prism, and a total station, and the equipment components in the monitoring points are as follows: a full-scale station comprising: the system comprises an MEMS sensor (micro electro mechanical system), GNSS equipment, a target prism and a total station, and is used for acquiring real coordinates and displacement under real-time, medium-short term and long-term operation of a dam. And the GM measuring point comprises an MEMS sensor (micro electro mechanical system) and GNSS equipment and is used for acquiring coordinates and displacement of the real-time measuring point, the medium-short measuring point and the short-term measuring point. The MEMS measuring point only comprises an MEMS sensor and is used as a monitoring net encryption point for acquiring displacement and relative coordinates. The method comprises the following steps that all measuring points are used as control points in a monitoring network, obtained displacement values can be used as true displacement values, and the whole real displacement field of the dam engineering is controlled and adjusted; the GM measuring point is used as a supplementary control point, the obtained displacement value can be used as a medium-short term displacement value, and the medium-short term displacement field of the dam engineering is controlled and adjusted; the MEMS measuring points are used as encryption points, and various measuring points are arranged in an interactive mode.

Further as an optional implementation mode, the MEMS sensor (micro electro mechanical system) is a passive measurement value, adopts a relative positioning mode, works autonomously, has good dynamic characteristics, but lacks an absolute position and has no time information, and a recursive accumulated error is serious. The GNSS is an active measurement value, adopts an absolute positioning mode, has small error accumulation, can provide relatively high positioning accuracy within a certain time and provide time information, but is easily influenced by the environment and lags in dynamic response. The total station is used for accurate measurement, an absolute positioning mode is adopted, error accumulation is basically avoided, high-precision position information and time information are provided, and monitoring lag is serious.

Based on the advantages and disadvantages of the three monitoring devices, the data of the three monitoring points are processed by adopting a long-short-term monitoring value fusion algorithm, and the long-short-term monitoring value fusion algorithm is a displacement deformation monitoring system fusion algorithm of an MEMS (micro electro mechanical system) sensor instantaneous monitoring system, a GNSS short-term monitoring system and a total station instrument accurate measurement long-term monitoring system.

Based on the system, as shown in fig. 3, the embodiment further provides a reservoir dam safety monitoring multi-instrument combined observation and early warning method, and the method can effectively improve the monitoring precision of the reservoir dam bank slope stability, is beneficial to timely discovering abnormalities, and reduces dangerous cases. The method specifically comprises the following steps:

s1, establishing a monitoring network for monitoring the displacement of a reservoir dam; the monitoring net comprises a total measuring point, a GM measuring point and a MEMS measuring point.

Wherein, step S1 specifically comprises steps S11-S12:

s11, dividing the dam engineering area into a plurality of monitoring areas, wherein the monitoring areas comprise geological complex areas, engineering connection areas and engineering abnormal areas; all the areas are distributed along the axis of the dam in a band shape, various monitoring points are arranged along the central axis and the side lines of the areas, all measuring points or GM measuring points are adopted in key areas, and the monitoring points are connected with one another to form a monitoring network. The monitoring grids comprise triangular grids and quadrilateral grids.

And S12, if the distances between the total measuring points and the GM measuring points are too far, encrypting the monitoring network through the MEMS measuring points to realize encryption arrangement.

And S2, calculating the displacement of the monitoring point according to the data collected by the MEMS measuring point, and preliminarily forming a dam real-time displacement field by combining the analysis of the whole deformation rule of the dam.

Before step S2, a step of time synchronization is further included: and (4) synchronizing the time of the observation values such as the accurate measurement of MEMS, GNSS and total stations in various measuring points.

After synchronization, the MEMS measuring points can provide real-time angular acceleration, acceleration and angle of a certain point of the dam, and relative displacement is recurred through a calculation method. And (4) primarily forming a dam real-time displacement field by analyzing the displacement calculated by the MEMS measuring points through the whole deformation rule of the dam.

And S3, acquiring absolute coordinates and displacement values of the monitoring points by the GM measuring points, and calculating to obtain a medium-short term displacement field of the dam by combining the relative positioning of the MEMS measuring points.

And in 4-8 hours, the GM measuring point provides the absolute coordinates and displacement values of the GM measuring point acquired by the GNSS. Measuring absolute coordinates and displacement values of GM measuring points and function mu = [ N =][μ] _node And calculating the displacement of any point in the monitoring network. And the GNSS and the MEMS are fused with the measured value, the accumulated error of the MEMS is corrected, and a displacement field in a medium-short period is preliminarily formed.

And S4, correcting and determining the whole deformation trend of the dam through the full measuring points, calculating the whole displacement field of the dam by combining all the monitoring points, and obtaining the displacement field according to the calculation to realize dam deformation early warning.

And (3) correcting and determining the whole deformation trend of the dam by using a total station instrument, combining the monitoring network formed by arrangement and a function mu = [ N ]][μ] _node Calculating an overall displacement field; and measuring the deformation early warning value.

The method is used for calculating and analyzing the deformation displacement of the surface of the dam based on the multi-instrument displacement monitoring data, can effectively monitor the deformation of the surface of the reservoir dam and give an early warning in time, and improves the continuity, accuracy and reliability of monitoring.

This embodiment still provides a reservoir dam safety monitoring multi-instrument jointly observes early warning and supplies device, includes:

at least one processor;

at least one memory for storing at least one program;

when executed by the at least one processor, cause the at least one processor to implement the method of fig. 3.

The reservoir dam safety monitoring multi-instrument combined observation and early warning supply device can execute the reservoir dam safety monitoring multi-instrument combined observation and early warning supply method provided by the embodiment of the method, can execute any combination implementation steps of the embodiment of the method, and has corresponding functions and beneficial effects of the method.

The embodiment of the application also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and the computer instructions executed by the processor cause the computer device to perform the method illustrated in fig. 3.

The embodiment also provides a storage medium, which stores instructions or programs capable of executing the multi-instrument combined observation and early warning method for monitoring the safety of the reservoir dam provided by the embodiment of the method, and when the instructions or the programs are operated, the steps of any combination of the embodiments of the method can be executed, so that the method has corresponding functions and beneficial effects.

In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.

Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise indicated to the contrary, one or more of the described functions and/or features may be integrated in a single physical device and/or software module, or one or more functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those of ordinary skill in the art will be able to practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a reservoir dam safety monitoring multi-instrument jointly observes early warning system which characterized in that includes:

and the data processing module is used for acquiring monitoring data acquired by the full measuring points, the GM measuring points and the MEMS measuring points, processing the monitoring data to acquire a displacement field of the monitoring network, and realizing dam deformation early warning according to the displacement field.

2. The system of claim 1, wherein the monitoring net is arranged in a quadrilateral mesh manner or in a triangular mesh manner.

3. The reservoir dam safety monitoring multi-instrument combined observation and early warning system as claimed in claim 1, wherein the full measuring points are used for acquiring real coordinates and displacements of monitoring points in real time, in short term and in long term;

the MEMS measuring points are used as monitoring network encryption points and used for obtaining relative displacement and relative coordinates between the monitoring points.

4. The system of claim 1, wherein the MEMS measuring points comprise only MEMS sensors, data collected by the MEMS sensors are passive measuring values, the system works in a relative positioning mode, dynamic characteristics are good, absolute positions are lacked, time information is not available, and recursion accumulated errors are serious; and (3) preliminarily forming a dam real-time displacement field by combining the displacement calculated based on the data acquired by the MEMS measuring points and the analysis of the whole deformation rule of the dam.

5. The system of claim 1, wherein the GM measuring point comprises an MEMS sensor and a GNSS device, data collected by the GNSS device are active measurement values, the GNSS device works in an absolute positioning mode, error accumulation is small, position information and time information are provided, and the system is easily influenced by environment and dynamic response is delayed;

6. The system of claim 1, wherein the total survey points comprise MEMS sensors, GNSS devices, target prisms, and total stations; the total station works in an absolute positioning mode, does not have error accumulation, provides high-precision position information and time information, and has serious monitoring lag;

7. A reservoir dam safety monitoring multi-instrument combined observation early warning method is characterized by comprising the following steps:

8. The reservoir dam safety monitoring multi-instrument combined observation and early warning method as claimed in claim 7, wherein the establishment of a monitoring network for monitoring reservoir dam displacement comprises:

dividing the dam engineering area into a plurality of monitoring areas, wherein the monitoring areas comprise a geological complex area, an engineering connection area and an engineering abnormal area; each area is distributed along the axis of the dam in a band shape, various monitoring points are arranged along the central axis and the side line of the area, a key area adopts a full measuring point or a GM measuring point, and the monitoring points are connected to form a monitoring network;

9. The reservoir dam safety monitoring multi-instrument combined observation and early warning method according to claim 8, wherein the monitoring net is arranged in a quadrilateral mesh mode or in a triangular mesh mode.

10. The reservoir dam safety monitoring multi-instrument combined observation and early warning method as claimed in claim 8, wherein the displacement of other monitoring points is calculated by the following formula according to absolute coordinates and displacement values of the monitoring points acquired by GM measuring points:

μ＝[N][μ] _node

in the formula, μ represents the displacement of the point to be determined, [ N ]]Represents a shape function, [ mu ] m] _node Representing control point displacement vectors.