Potential landslide area determination method based on InSAR (Interferometric Synthetic Aperture Radar) and borehole camera technology

Abstract

The invention relates to a potential landslide area determination method based on InSAR and a borehole camera technology. The method adopts the following technical scheme: S1, selecting a research area range and an InSAR technical means; s2, acquiring InSAR historical image data of different time domains, and processing the data; s3, acquiring a multi-time-domain earth surface deformation rate in the research area, extracting an earth surface deformation displacement time curve in the research area, comprehensively determining a landslide risk earth surface deformation rate threshold value according to historical images, landform data and the displacement time curve, and determining the position and range of a potential landslide mass in the research area; s4, drill holes are formed in the potential landslide mass area, digital image information in the drill holes is collected by means of drill hole camera equipment, and S5, a joint inclination angle in the rock mass is determined by analyzing drill hole digital images, a potential sliding surface contour line is drawn, and the potential landslide mass depth is determined. The landslide position and range can be accurately and rapidly determined, large-range and low-efficiency field survey is avoided, and the working efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of slope engineering, and more specifically relates to a method for determining a potential landslide area based on InSAR and borehole camera technology. Background technique [0002] For a long time, whether it is a natural slope or an artificial slope, landslide disasters have occurred from time to time around the world, and once they occur, they will pose a huge threat to social public safety and economic development. However, the occurrence of landslides is not only affected by natural factors (such as geological structure, mechanical properties of rock mass, rainfall, earthquakes, etc.), but also related to man-made engineering activities (engineering excavation, mining, etc.). However, regardless of the landslide geological disaster induced by any factor, if the hazard identification can be carried out before the landslide occurs, the deformation and displacement precursor information of the landslide ...

AI Technical Summary

Problems solved by technology

The problem with this method is that it can only characterize the surface deformation of the slope and does not provide any internal information of the landslide. However, the occurrence of landslides is not only related to the surface deformation of the slope, but more importantly, the mechanical properties of the rock mass inside the slope, The occurrence of structural planes is related to the state of groundwater occurrence, and ignoring the internal information of the slope will lead to serious errors in the evaluation results

This method requires evaluators to have professional knowledge reserves and capabilities. In addition, the mathematical model is often simplified a lot, resulting in poor accuracy of the evaluation results, and the boundary conditions are complex during calculation, and there will be situations such as non-convergence that make it impossible to calculate.

Images