A high-speed railway subsidence hazard assessment method based on multi-source data integration

Abstract

The present invention provides a high-speed rail settlement hazard assessment method based on multi-source data integration, comprising the following steps: S1, using InSAR technology to collect ground deformation data, including collecting InSAR image data, optical remote sensing image data, hydrogeological data, two Leveling survey data; S2, preprocessing the data collected in step S1; S3, using PS‑InSAR+SBAS‑InSAR two time series InSAR technology to analyze and extract the ground deformation results; S4, for the settlement separation of the background area of ​​the high-speed rail line; S5 1. Use the MIC algorithm to assign weights to the hazard factors that affect the ground deformation; S6. Assessment of the hazard of land subsidence. The evaluation result of the high-speed railway subsidence hazard assessment method based on multi-source data integration tends to be a large-scale, fast, objective, economical and efficient land subsidence hazard assessment system to achieve long-term monitoring and ensure the safe development of the city , to reduce its threat to the economic security of life and property.

Description

Technical field [0001] The present invention belongs to the field of ground settlement assessment, in particular, to a high-speed rail settlement hazard assessment method based on multi-source data integration. Background technique [0002] Ground settlement is an unversable geological disaster in which urban buildings and connecting cities have a large safety hazard. With the progress of urbanization in my country, the urban area is constantly expanding, and the high-speed railway assumes the main people's flow between intercities, and the demarcation requirements of the ground are more stringent. The ground settlement is also increasing to urbanization, and the influence of ground settlement for urban buildings is a slow development process, so it is necessary to make long-term monitoring, and for the development of ground settlement, it is necessary to establish long-range monitoring and evaluation. mechanism. InSAR ground deformation monitoring has been widely used in terrest...

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Problems solved by technology

InSAR ground deformation monitoring has been widely used in ground deformation monitoring. Compared with GPS control network and leveling control network, large-scale deformation monitoring results can be obtained, and the results are in various forms. At present, the reliability of InSAR ground monitoring results has been improved. Very high, but the current hazard assessment for ground monitoring is mostly based on level monitoring and previous observation records, the timeliness is poor, and the monitoring results are discrete data points. In terms of hazard evaluation, the data obtained are mostly discrete data points. It cannot intuitively reflect the continuous land subsidence hazards of large-scale maps, and in the hazard assessment, the weight assignment of each hazard factor is mostly based on subjective experience values, and it is impossible to form a unified and effective assessment system in different regions. The terrain is different, and the subjective experience value is of little reference

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