House risk assessment method based on PS-InSAR technology

Abstract

The invention discloses a house risk assessment method based on the PS-InSAR technology in the technical field of interferometric synthetic aperture radar. The method includes the following steps: obtaining PS points on the surface of a house by using N SAR image data based on the permanent scatterer-interferometric synthetic aperture radar technology; clustering the PS points in a single house according to the historical settlement information and spatial distribution of the PS points, wherein the clustered points can well represent the settlement condition of the small area; for the clustered points in the single house, calculating the inclination rate between the point pairs, carrying out comparison to obtain the maximum inclination, and obtaining an inclination history curve as the evaluation basis for the hazard level of the house; and in the time dimension, decomposing an inclination timing curve into two main components by means of a signal processing method: regular periodic deformation and piecewise linear deformation; and after removing periodic components, analyzing the speed change of each identified time partition to detect abnormal speed and acceleration, and evaluating the stability of the house by integrating the house type, maximum cumulative settlement and inclination rate.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar interferometry, in particular to a house risk assessment method based on PS-InSAR technology. Background technique [0002] Building settlement refers to the phenomenon that the foundation deformation makes the building move along the direction of gravity when it leaves the initial position. There are many factors that cause building settlement, including natural factors and human factors in the process of building development and construction. In general, the engineering geological conditions, hydrogeological conditions, soil physical properties, atmospheric temperature and groundwater seasonal and periodic changes of the building foundation, the size of the building's own load, structure type, height and external load are the factors that cause the settlement of the building. the main reason. [0003] The uneven settlement of the building is likely to cause the structure of the...

AI Technical Summary

Problems solved by technology

[0012] There are a large number of urban houses, and monitoring by leveling and inclination measurement requires a lot of manpower and material resources; traditional monitoring, generally measures the current absolute value, and cannot predict the future. The cost is high, and certain professional and technical personnel are required. Carry out measurement work together, the response speed is slow, there are many houses in the city, and the measurement is done one by one, the time span is long, the project volume is huge, the degree of automation is low, and manpower is involved in the whole process

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