Research on stability of high slope of sandy loess road cutting based on response surface method
In order to provide reference for the design of high slope of sandy loess road cutting,taking the high slope of sandy loess road cutting in a mountainous area of Gansu province as the engineering support,the strength reduction method was used to study the influence of slope height,slope ratio,and step height on the safety factor of slope.On this basis,the response sur-face method was used to optimize the design of high slope shape of the loess road cutting with the safety factor of slope as benchmark.The results show that the safety factor of slope stability is negatively correlated with the slope height of single stage,and is positively correlated with the slope ratio of single stage and the step width.The influence degree of slope shape parameters on slope FS is as follows:step width>slope height of single stage>slope ratio of single stage.Based on the nu-merical solution provided by the regression model equation,the optimal design scheme of slope shape under different slope heights(H)is obtained.The research results can provide a theoretical basis for the stability design and targeted treatment of high slopes in northwest sandy loess.
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