Test and evaluation of spatiotemporal distribution characteristics of fully weathered granite cut slope under rainfall erosion
To test and evaluate the spatiotemporal distribution characteristics of fully weathered granite cut slope under rainfall erosion,the fully weathered granite cut slope of Yunnan Molin Highway under con-struction was selected for field test.Firstly,combined with three-dimensional scanning test and electrical measurement,the shape characteristic parameters and slope resistivity profile were obtained;then,the nor-mal distribution model and quantile-quantile plot method were introduced to define the material properties of the slope,mapping slope erosion state with resistivity differences.The results show that large-scale ero-sion characteristics can be observed in the area at the bottom and middle of the slope(y=0~40 m),while multi-point concentrated erosion characteristics can be observed in the area at slope platforms,and the ero-sion depth is about 5 m.With the application of vegetation protection,large-scale erosion has transformed into a multi-point concentrated erosion,and the evaluation results have good consistency with the shape characteristic parameters.The research has practical significance for the rainfall erosion disaster preven-tion,and can also be used as a reference for similar research.
fully weathered granite cut sloperainfall erosionspatiotemporal distribution characteristicselectrical measurement technologythree-dimensional laser scanning test