Landslide risk quantitative evaluation method for areas along traffic line

Abstract

The invention discloses a landslide risk quantitative evaluation method for an area along a traffic line, and relates to the technical field of landslide risk evaluation. The method comprises the following steps: S1 drawing a landslide checking graph in an ArcGIS, and storing various landslide information; S2 acquiring a landslide scale probability PM; S3 collecting rainfall data, and obtaining the time probability PT of landslide; and S4 obtaining the landslide space probability PS of the traffic line area. According to the method, historical landslide data of the target area is utilized, and information such as occurrence time, morphological characteristics and landslide scale of each historical landslide is obtained through the landslide checking graph. A time scale is introduced when the landslide risk is evaluated, the evaluation of the landslide risk is expanded to a period of time in the future through the probability of the landslide caused by rainfall, and a better disaster prevention and control guidance effect can be provided; and the spatial probability of the landslide is obtained by utilizing Logistic regression analysis and combining with the GIS, so that the spatial distribution of the landslide risk in the target area is defined, and good global controllability is achieved.

Description

technical field [0001] The invention belongs to the technical field of landslide risk assessment, in particular to a method for quantitatively assessing landslide risk in areas along traffic lines. Background technique [0002] There are a large number of mountains and hills distributed in the central and western regions of my country. The existence of this terrain has led to the existence of a large number of natural and artificial slopes. Under the action of rainwater, earthquakes, etc., the shear stress of the soil in the slope increases or the shear strength of the soil decreases, and sliding damage areas appear. The continuous growth and penetration of these sliding damage areas will lead to landslide disasters, which seriously threaten people's production. Life safety, causing a lot of economic losses. [0003] Traffic lines such as highways and railways often have to cross these terrains, and the hidden dangers of landslides threaten the safety of passing vehicles an...

AI Technical Summary

Problems solved by technology

Under the action of rainwater, earthquakes, etc., the shear stress of the soil in the slope increases or the shear strength of the soil decreases, and sliding damage areas appear. The continuous growth and penetration of these sliding damage areas will lead to landslide disasters, which seriously threaten people's production. life safety, causing massive economic losses

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