Hidden danger identification marking method for power transmission line tower foundation land subsidence disaster

Abstract

The invention discloses a hidden danger identification marking method for a ground subsidence disaster of a power transmission line tower foundation. Comprising the steps of power transmission line tower foundation land subsidence disaster investigation, research area remote sensing image data query, optical remote sensing data interpretation, InSAR data interpretation, field investigation, optical image data interpretation mark analysis, InSAR interpretation mark analysis and field investigation mark analysis. According to the method, the multi-source remote sensing technology and the field investigation are utilized to carry out the method for identifying the potential ground subsidence hazard of the power transmission line tower foundation on the regional scale, and each step and the adopted method in identifying the potential ground subsidence hazard hazard of the power transmission line tower foundation by utilizing the multi-source remote sensing technology and the field investigation are standardized; the working efficiency, the recognition precision and the economic benefit of the hidden danger recognition of the ground subsidence of the power transmission line tower foundation can be practically and effectively improved; and the technical process of power transmission line tower foundation land subsidence disaster investigation can be effectively standardized.

Description

Technical Field

[0001] The invention relates to a method for identifying hidden dangers of ground subsidence, in particular to a method for identifying hidden dangers of ground subsidence disasters at the foundation of a power transmission line tower, and belongs to the technical field of construction of facilities related to power systems. Background Art

[0002] Since the completion of the "West-to-East Power Transmission" project, power resources have become one of my country's important energy sources, and the stability of power system-related facilities (such as transmission towers) has become a prerequisite for sustainable development. In recent years, ground subsidence has spread across the country, especially uneven ground subsidence has caused the foundation of transmission towers to sink to varying degrees, which can easily cause transmission towers to tilt or even collapse, seriously affecting the safety of power resource transportation, national economic development and the quality of life of the people.

[0003] In recent years, with the updating and iteration of remote sensing technology, compared with traditional monitoring methods, its advantages such as large monitoring range, short monitoring cycle, high efficiency and accuracy have gradually become prominent. At present, in the field of ground subsidence research, there have been many successful cases of using remote sensing data to solve problems, such as a ground subsidence prediction method based on InSAR technology in remote sensing disclosed in announcement number CN109059849A, which includes the following steps: Step S1: Use InSAR technology in remote sensing to collect ground data; Step S2: Analyze and process the collected radar data: Step S3: Unify the coordinate system of satellite-borne and airborne PSInSAR observation results; Step S4: Unify the reference benchmarks of satellite-borne and airborne PSInSAR observation values; Step S5: Observe the settlement velocity of satellite-borne and airborne PSInSAR after benchmark deviation compensation. The correlation calculation and accuracy test of the rate results are carried out; Step S6: Time series fusion of the accumulated settlement observed by satellite and airborne PSInSAR; Step S7: Ground settlement prediction is carried out through the DEM data model. When integrating images, the airborne radar data PSInSAR can be unaffected by the atmosphere, so that the images can more accurately reflect the ground settlement results, and thus better accurately predict the ground settlement. However, most researchers focus on the improvement and innovation of the application methods of remote sensing technology, and do not consider the coordination and cooperation between multi-source data too much, especially in the field of hidden danger identification of ground settlement disasters of transmission line tower foundations, and a systematic disaster identification and analysis technical process has not been formed. The settlement law of the study area obtained by interpreting a single data cannot be effectively, accurately and quickly verified. Summary of the invention

[0004] The purpose of the present invention is to provide a method for identifying hidden dangers of ground subsidence disasters at the foundation of power transmission line towers in order to solve the problems of imperfect application of the existing technology for identifying hidden dangers of ground subsidence disasters at the foundation of power transmission line towers, high cost and low efficiency for identifying and analyzing hidden dangers of ground subsidence disasters at the foundation of power transmission line towers, conduct research on ground subsidence disasters at the foundation of power transmission line towers, and combine human-computer interaction of optical image data with interpretation and processing of SAR data to achieve the effect of mutual verification between the two.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a method for identifying hidden dangers of ground subsidence disasters of power transmission line tower foundations, the method comprising the following steps: Step 1: Investigation of ground subsidence disasters at the foundation of transmission line towers. By obtaining the data content of the ground at the foundation of transmission line towers, the remote sensing data collection period and geological disasters are preliminarily identified and verified, and the distribution law of geological disasters is preliminarily studied and judged; Step 2: Query the remote sensing image data of the study area to determine the inventory type, acquisition method, remote sensing data type that meets the research needs and related calculation parameters of the remote sensing data of the study area; Step 3: Interpretation of optical remote sensing data: preliminary analysis of the environmental background traversed by the transmission line towers based on the optical image data collected in the study area, division of the tower area based on the different landforms and features shown in the optical images, and the distribution pattern of the environment around the line; Step 4: InSAR data interpretation: Use differential interferometry, permanent scatterer interferometry and small baseline set interferometry techniques to perform remote sensing interpretation on the InSAR data collected in the study area to obtain the deformation data of the ground subsidence of the transmission line tower foundation. Through line historical deformation data query and regional deformation analysis, select the most suitable remote sensing interpretation technology for the study area, and analyze the distribution law and tower foundation deformation of the ground subsidence interpretation results obtained by the optimal interpretation technology; Step 5: Field investigation: Based on the results of ground subsidence of the tower foundation obtained by optical interpretation of the transmission line towers and InSAR data interpretation in the study area, a field investigation is carried out to further verify the interpretation results of ground subsidence disasters and collect on-site deformation data of the towers; Step 6: Analyze the interpretation signs of optical image data. According to the optical characteristics of the ground subsidence hazards of the transmission line tower foundation shown in the optical image, the optical interpretation signs are divided into direct signs and indirect signs. Step 7: InSAR interpretation sign analysis: Based on the spatial deformation and temporal deformation law of the ground subsidence of the transmission line tower foundation in the study area obtained by the optimal synthetic aperture radar interferometry technology, combined with the historical deformation distribution of the transmission line tower, the InSAR interpretation sign of the ground subsidence disaster of the transmission line tower foundation, including the cumulative deformation amount, deformation rate and deformation acceleration of the tower foundation, is established; Step 8: Field investigation mark analysis: Through the field investigation of transmission line towers, the deformation of the tower body, tower base, foundation and ground objects are analyzed, and the deformation and damage of the transmission line towers caused by ground subsidence are sorted out and summarized to establish the field investigation marks of the transmission line towers.

[0006] As a further solution of the present invention: the data content of the investigation includes the deformation history of the tower, the distribution range of geological disasters, stratum lithology, topography, meteorology and hydrology, and human engineering activities. Among them, the deformation history of the tower and the distribution range of geological disasters serve the collection period of remote sensing data and the preliminary identification and verification of geological disasters, and the collection of stratum lithology, topography, meteorology and hydrology, and human engineering activity data serves the preliminary study and judgment of the distribution law of geological disasters.

[0007] As a further solution of the present invention: the purpose of the ground subsidence disaster investigation on the foundation of the transmission line tower is to understand the deformation of the transmission line tower and the geological environment background in the study area, and to understand the deformation history, disaster development characteristics, distribution patterns, etc. of the transmission line tower, so as to serve the subsequent processing and analysis of multi-source remote sensing data.

[0008] As a further solution of the present invention: the method of optical image data interpretation and sign analysis is to identify the environmental background and ground deformation of the transmission line tower foundation in the optical image data obtained in the study area to obtain the hidden danger distribution results of ground subsidence of the tower foundation.

[0009] As a further solution of the present invention: direct signs are ground collapse and erosion deformation of the tower foundation that can be directly obtained based on the ground subsidence disaster in the optical image, and indirect signs are water system changes, landform characteristics and ground object characteristics near the tower foundation shown in the optical image.

[0010] As a further solution of the present invention: the method of InSAR interpretation sign analysis is to extract the cumulative settlement, settlement rate and settlement acceleration of the transmission line tower foundation in the study area, further divide the deformation results into deformation intensity levels and analyze the deformation of the towers at each level, so as to obtain the hidden danger identification results of the tower foundation InSAR interpretation.

[0011] As a further solution of the present invention: the method of field investigation sign analysis is to conduct a field investigation on the transmission line towers in the study area, summarize the on-site investigation results of the towers based on drone aerial photos taken on site, tower foundation deformation measurement data and deformation conditions around the towers, and further classify the deformation conditions of different parts of the towers to obtain the hidden danger identification results of the tower field investigation.

[0012] The beneficial effects of the present invention are: 1) The present invention uses multi-source remote sensing technology and field surveys to carry out a method for identifying hidden dangers of ground subsidence of transmission line tower foundations on a regional scale. The method systematically standardizes the various steps and methods used in identifying potential hidden dangers of ground subsidence disasters of transmission line tower foundations using multi-source remote sensing technology and field surveys, and can effectively improve the work efficiency, identification accuracy and economic benefits of identifying hidden dangers of ground subsidence disasters of transmission line tower foundations; 2) The establishment of ground subsidence hazard identification technology can effectively standardize the technical process of ground subsidence disaster investigation for transmission line tower foundations; 3) The zoning of the geological disaster hazard identification results can effectively improve the subsequent operation, planning and management of the transmission line, and effectively improve the ability of the transmission line tower to resist ground subsidence disasters; the design of the present invention is effective and worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the identification process of the present invention; Figure 2 It is a schematic diagram of the identification steps of the present invention. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Embodiment 1, as Figure 1 to Figure 2 As shown, a method for identifying hidden dangers of ground subsidence disasters at the foundation of a power transmission line tower is provided, the method comprising the following steps: Step 1: Investigation of ground subsidence disasters at the foundation of transmission line towers. By obtaining the data content of the ground at the foundation of transmission line towers, the remote sensing data collection period and geological disasters are preliminarily identified and verified, and the distribution law of geological disasters is preliminarily studied and judged; Step 2: Query the remote sensing image data of the study area to determine the inventory type, acquisition method, remote sensing data type that meets the research needs and related calculation parameters of the remote sensing data of the study area; Step 3: Interpretation of optical remote sensing data: preliminary analysis of the environmental background traversed by the transmission line towers based on the optical image data collected in the study area, division of the tower area based on the different landforms and features shown in the optical images, and the distribution pattern of the environment around the line; Step 4: InSAR data interpretation: Use differential interferometry, permanent scatterer interferometry and small baseline set interferometry techniques to perform remote sensing interpretation on the InSAR data collected in the study area to obtain the deformation data of the ground subsidence of the transmission line tower foundation. Through line historical deformation data query and regional deformation analysis, select the most suitable remote sensing interpretation technology for the study area, and analyze the distribution law and tower foundation deformation of the ground subsidence interpretation results obtained by the optimal interpretation technology; Step 5: Field investigation: Based on the results of ground subsidence of the tower foundation obtained by optical interpretation of the transmission line towers and InSAR data interpretation in the study area, a field investigation is carried out to further verify the interpretation results of ground subsidence disasters and collect on-site deformation data of the towers; Step 6: Analyze the interpretation signs of optical image data. According to the optical characteristics of the ground subsidence hazards of the transmission line tower foundation shown in the optical image, the optical interpretation signs are divided into direct signs and indirect signs. Step 7: InSAR interpretation sign analysis: Based on the spatial deformation and temporal deformation law of the ground subsidence of the transmission line tower foundation in the study area obtained by the optimal synthetic aperture radar interferometry technology, combined with the historical deformation distribution of the transmission line tower, the InSAR interpretation sign of the ground subsidence disaster of the transmission line tower foundation, including the cumulative deformation amount, deformation rate and deformation acceleration of the tower foundation, is established; Step 8: Field investigation mark analysis: Through the field investigation of transmission line towers, the deformation of the tower body, tower base, foundation and ground objects are analyzed, and the deformation and damage of the transmission line towers caused by ground subsidence are sorted out and summarized to establish the field investigation marks of the transmission line towers.

[0016] in, Figure 1 The medium optical image data includes multiple periods of Landsat data, high-resolution series data, Sentinel-2 data, and MODIS data; the tower deformation survey is the deformation survey of the main beams and components of the tower, the tower base survey is the deformation and height difference of the foundations of each tower leg of the tower, the foundation deformation is the collapse and crack survey near the foundation, and the ground feature survey is the settlement and crack survey of the roads and buildings around the tower; SAR data is synthetic aperture radar data, spatial deformation mainly refers to the deformation of the study area as a whole, and time series deformation is mainly for the deformation of a single tower foundation.

[0017] Embodiment 2. In addition to all the technical features in Embodiment 1, this embodiment also includes: the data content of the survey includes the deformation history of the tower, the distribution range of geological disasters, stratum lithology, topography, meteorology and hydrology, and human engineering activities. Among them, the deformation history of the tower and the distribution range of geological disasters serve the collection period of remote sensing data and the preliminary identification and verification of geological disasters. The collection of stratum lithology, topography, meteorology and hydrology, and human engineering activity data serves the preliminary study and judgment of the distribution law of geological disasters.

[0018] The purpose of the ground subsidence disaster investigation on the foundation of transmission line towers is to understand the deformation of transmission line towers and the geological environment background in the study area, and to understand the deformation history, disaster development characteristics, and distribution patterns of transmission line towers, so as to serve the subsequent processing and analysis of multi-source remote sensing data.

[0019] Embodiment 3, in addition to all the technical features of Embodiment 1, this embodiment also includes: the method of optical image data interpretation and sign analysis is to identify the environmental background and ground deformation of the transmission line tower foundation in the optical image data obtained in the study area to obtain the hidden danger distribution results of ground subsidence of the tower foundation.

[0020] Furthermore, direct signs are ground collapse and erosion deformation of tower foundations that can be directly obtained based on ground subsidence disasters in optical images, and indirect signs are changes in water systems, landform features and ground features near tower foundations shown in optical images.

[0021] Embodiment 4. In addition to all the technical features of Embodiment 1, this embodiment also includes: the method of InSAR interpretation sign analysis is to extract the cumulative settlement, settlement rate and settlement acceleration of the transmission line tower foundation in the study area, further classify the deformation results into deformation intensity levels and analyze the deformation of the towers at each level, so as to obtain the hidden danger identification results of the tower foundation InSAR interpretation.

[0022] The method of field investigation sign analysis is to conduct a field investigation on the transmission line towers in the study area, summarize the on-site investigation results of the towers based on the drone aerial photos taken on site, the tower foundation deformation measurement data and the deformation conditions around the towers, and further classify them according to the deformation conditions of different parts of the towers, so as to obtain the hidden danger identification results of the tower field investigation.

[0023] Working principle: It standardizes the steps and methods used in identifying potential hazards of ground subsidence of transmission line tower foundations using multi-source remote sensing and survey data. The sorting out of methods for identifying hazards of ground subsidence of tower foundations can effectively improve the efficiency of identifying hazards of ground subsidence of tower foundations in large areas and the accuracy of future line planning and design; it makes the method flow of identifying hazards of ground subsidence of tower foundations using multi-source remote sensing and survey data more perfect.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for identifying hidden dangers of ground subsidence disasters at the foundation of a power transmission line tower, characterized in that: The hidden danger identification method comprises the following steps: Step 1: Investigation of ground subsidence disasters at the foundation of transmission line towers: By obtaining the data content of the ground at the foundation of transmission line towers, the collection period of remote sensing data and the preliminary identification and verification of geological disasters are carried out, and the distribution law of geological disasters is preliminarily determined; Step 2: Query remote sensing image data of the study area: used to determine the inventory type, acquisition method, remote sensing data type and related calculation parameters of the study area remote sensing data that meet the research needs; Step 3: Interpretation of optical remote sensing data: Based on the optical image data collected in the study area, a preliminary analysis of the environmental background traversed by the transmission line towers is conducted. The tower area is divided based on the different landforms and features shown in the optical images to obtain the distribution pattern of the environment around the line. Step 4: InSAR data interpretation: Use differential interferometry, permanent scatterer interferometry and small baseline set interferometry techniques to perform remote sensing interpretation on the InSAR data collected in the study area to obtain the deformation data of the ground subsidence of the transmission line tower foundation. Through line historical deformation data query and regional deformation analysis, select the most suitable remote sensing interpretation technology for the study area, and analyze the distribution law and tower foundation deformation of the ground subsidence interpretation results obtained by the optimal interpretation technology; Step 5: Field investigation: Based on the results of ground subsidence of the tower foundation obtained by optical interpretation of the transmission line towers and InSAR data interpretation in the study area, a field investigation is carried out to further verify the interpretation results of ground subsidence disasters and collect on-site deformation data of the towers; Step 6: Analysis of optical image data interpretation signs: Based on the optical characteristics of the ground subsidence hazards of the transmission line tower foundation shown in the optical image, the optical interpretation signs are divided into direct signs and indirect signs; Step 7. InSAR interpretation sign analysis: Based on the spatial deformation and temporal deformation law of the ground subsidence of the transmission line tower foundation in the study area obtained by the optimal synthetic aperture radar interferometry technology, combined with the historical deformation distribution of the transmission line tower, the InSAR interpretation sign of the ground subsidence disaster of the transmission line tower foundation, including the cumulative deformation amount, deformation rate and deformation acceleration of the tower foundation, is established; Step 8. Field investigation mark analysis: Through the field investigation of transmission line towers, the deformation of the tower body, tower base, foundation and ground objects are analyzed, and the deformation and damage of the transmission line towers caused by ground subsidence are sorted out and summarized to establish the field investigation marks of the transmission line towers.

2. The hidden danger identification marking method according to claim 1 is characterized in that: In the step 1, the data investigated include the deformation history of the tower, the distribution range of geological disasters, stratum lithology, topography, meteorology, hydrology and human engineering activities. The deformation history of the tower and the distribution range of geological disasters serve the collection period of remote sensing data and the preliminary identification and verification of geological disasters. The collection of stratum lithology, topography, meteorology, hydrology and human engineering activity data serves the preliminary study and judgment of the distribution law of geological disasters.

3. The hidden danger identification marking method according to claim 1 is characterized in that: In the step 1, the purpose of the ground subsidence disaster investigation on the foundation of the transmission line tower is to understand the deformation of the transmission line tower and the geological environment background in the study area, and to understand the deformation history, disaster development characteristics, distribution patterns, etc. of the transmission line tower, so as to serve the subsequent processing and analysis of multi-source remote sensing data.

4. The hidden danger identification marking method according to claim 1 is characterized in that: In step six, the method of interpreting and analyzing optical image data is to identify the environmental background and ground deformation of the transmission line tower foundation in the optical image data obtained in the study area to obtain the distribution results of the hidden dangers of ground subsidence of the tower foundation.

5. The hidden danger identification marking method according to claim 1 is characterized in that: In step six, direct signs are ground collapse and erosion deformation of the tower foundation that can be directly obtained based on the ground subsidence disaster in the optical image, and indirect signs are changes in the water system, landform characteristics and ground object characteristics near the tower foundation shown in the optical image.

6. The hidden danger identification marking method according to claim 1 or 5, characterized in that: In step seven, the method of InSAR interpretation sign analysis is to extract the cumulative settlement, settlement rate and settlement acceleration of the transmission line tower foundation in the study area, further classify the deformation results into deformation intensity levels and analyze the deformation of the towers at each level, so as to obtain the hidden danger identification results of the tower foundation InSAR interpretation.

7. The hidden danger identification marking method according to claim 1 is characterized in that: In the step eight, the method of field investigation sign analysis is to conduct a field investigation on the transmission line towers in the study area, summarize the on-site investigation results of the towers based on the drone aerial photos taken on site, the tower foundation deformation measurement data and the deformation conditions around the towers, and further classify the deformation conditions of different parts of the towers to obtain the hidden danger identification results of the tower field investigation.

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