关键词: 泥化夹层, 抗剪强度, 红砂岩, 边坡稳定

Abstract: Slope destabilization and land slip usually happened while building the speedway in red sandstone area. On the base of the research findings about properties of the red sandstone and slope stability，the result of the indoor test on physical- mechanical property of clayer thin interlayer in red sandstone was mainly introduced. The variational rule of the shear strength by changing the water ratio of the thin interlayer was researched. The influencing on stability of slope with physicalmechanical property of the clayer thin interlayer in red sandstone were analysed. The research results indicate that the effect of the Water Sensitivity of the clayer thin interlayer is strong，and the clayer thin interlay does adverse effect on stability of slope.

Key words: thin interlayer, shearing strength, red sandstone, slope stability