Identification method of deformation evolution stages of red-bed rock landslides in eastern Sichuan

Abstract

The invention relates to a method for identifying a deformation evolutionary phase of red rock landslide in east Sichuan. The method comprises the following steps: confirming a disaster-pregnant background condition in a surveying area, main geological disaster problems and controlled factors; confirming the deformation evolutionary phase of large and super-large bedding rock landslide in the surveying area and an identification mark feature of each deformation evolutionary phase by investigating typical cases in the surveying area; establishing high-precision remote sensing interpretation data and DEM in the surveying area; explaining the geological environments, such as, material construction, geologic structure and slope landform, in the surveying area according to the remote sensing interpretation data and DEM; preliminarily pre-judging the hidden danger slope in the surveying area according to the identification mark feature and the interpretation result; and rechecking the preliminarily confirmed hidden danger slope adopting an engineering geological analogy method through field ground surveying, thereby identifying the hidden danger slope, judging the deforming phase and determining. According to the invention, the hidden danger slope in the red layer in east Sichuan is more effectively determined in the ground surveying process and the guiding basis is supplied for the group measurement and prevention, monitoring, early warning and forecasting of the landslide.

Description

technical field [0001] The invention relates to the field of geology, in particular to a method for identifying a deformation and evolution stage of a red bed rock landslide in eastern Sichuan. Background technique [0002] The eastern Sichuan red bed area is located on the northeastern edge of the Sichuan Basin, at the junction of the Dabashan arc structural belt and the eastern Sichuan parallel fold belt, and is strongly affected by tectonic movement. The strata in the area are mainly Jurassic and Cretaceous, the rock strata are gently inclined or nearly horizontal, and the landforms are mainly medium and low mountains and low mountains. The annual rainfall in the area is more than 1000mm. The special geological background makes this area a high-prone area for geological disasters. Among them, the frequent large-scale and super-large bedding rock landslides are the main disaster problems, such as the Kuiliangzi landslide in Zhongjiang County in 2002, and the Tiantai Townsh...

AI Technical Summary

Problems solved by technology

The first method is more subjective and more arbitrary; the second method is more ideal and is often not applicable due to external factors such as rainfall, earthquakes, and human engineering activities.

[0005] Generally speaking, there are not many research results on the early identification of landslides in China, especially the early identification of gently dipping bedding rock landslides in the red layer area of ​​eastern Sichuan is less, and the accuracy of identification is not high, so it is difficult to identify landslide hazards in the area. Provide a guiding basis for mass defense, monitoring, early warning and forecasting

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