High-speed rail settlement hazard assessment method based on multi-source data integration

Abstract

The invention provides a high-speed rail settlement hazard assessment method based on multi-source data integration. The method comprises the following steps: S1, collecting ground deformation data through employing the InSAR technology, wherein the ground deformation data comprise InSAR image data, optical remote sensing image data, hydrogeological data and secondary leveling data; S2, preprocessing the data collected in step S1; S3, adopting two time sequence InSAR technologies of PS-InSAR + SBAS-InSAR to analyze and extract a ground deformation result; S4, performing settling separation onthe background area of the high-speed rail line; S5, weighting the hazard factors influencing the ground deformation by adopting an MIC algorithm; and S6, evaluating the hazard of land subsidence. According to the high-speed rail settlement hazard assessment method based on multi-source data integration, an assessment result tends to a large-format, rapid, objective, economical and efficient ground settlement hazard assessment system, long-acting monitoring is achieved, safe development of cities is guaranteed, and threats of the cities to life, property and economic safety are reduced.

Description

technical field [0001] The invention belongs to the technical field of land subsidence evaluation, and in particular relates to a method for evaluating the hazard of high-speed railway subsidence based on multi-source data integration. Background technique [0002] Land subsidence is a ubiquitous and irreversible geological disaster, and it poses a great safety hazard to urban buildings and traffic lines connecting cities. With the progress of urbanization in my country, the area of ​​urban areas is expanding, and high-speed railways are responsible for the main flow of people between cities, so the requirements for ground deformation are more stringent. The harm of land subsidence to urbanization is also increasing, and the impact of land subsidence on urban buildings is a slow development process, so it needs to be monitored for a long time, and the hazard evaluation of land subsidence should be carried out to establish a long-term monitoring and evaluation mechanism. In...

AI Technical Summary

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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