Research on the Stability Evaluation Method of Red Clay Slope Based on Engineering Investigation
Based on engineering investigations,the failure characteristics of red clay slope of expressways in Guizhou Province are analyzed.The field DCP test and indoor direct shear test are used to study the relative strength of red clay slope at different depths,and the relationship between soil shear strength parameters and water content.Then,the failure mechanism of red clay slope is discussed.The disturbance of slope excavation,drying shrinkage and cracking lead to the gradual development and communication of cracks,and rainfall infiltration leads to the increase of soil moisture content,which results in the increase of bulk density of upper sliding mass and the attenuation of soil shear strength.Therefore,the safety factor of slope is greatly reduced.Aiming at the irrationality of the simplified Bishop method used in the stability evaluation of red clay slope,a numerical simulation calculation method based on engineering investigation and analysis is proposed,which has been well verified in engineering examples.This is helpful to realize accurate protection in slope protection and has certain social benefits.
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