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- W4313560129 endingPage "106979" @default.
- W4313560129 startingPage "106979" @default.
- W4313560129 abstract "Large-scale gully land consolidation projects have been implemented on the Loess Plateau of western China. These projects have formed a large number of fill slopes, which are prone to failure induced by rainfall. However, the failure mechanisms of the loess-bedrock fill slope, especially the influence of the weak interlayer between the loess fill and bedrock on slope failure, are not clear. In this study, a laboratory flume model experiment was carried out to investigate rainfall infiltration processes and failure mechanisms of a loess-bedrock fill slope induced by rainfall. The volumetric water content, pore water pressure, wetting front migration, and deformation characteristics of the slope were analyzed to reveal the effects of the weak interlayer on slope failure. The results show that rainfall-induced failure of loess-bedrock fill slope exhibited characteristics of mode transformation, initiated by the local failure of the slope toe and gradually transforming into a multi-stage rotational slide-earthflow and gully erosion with continued rainfall. The maximum migration rate of the wetting front in the weak interlayer is about 3 times that in loess fill, occurring in the weak interlayer within a depth of 0.64 m (about 16 m in the prototype). The preferential flow formed in the weak interlayer accelerated the saturation of the fill slope and generated seepage force towards the outside of the slope, which makes the upper fill slope more prone to shear failure along the weak interlayer. These results provide a theoretical basis for preventing or mitigating related risks associated with gully land consolidation projects on the Loess Plateau." @default.
- W4313560129 created "2023-01-06" @default.
- W4313560129 creator A5001937247 @default.
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- W4313560129 date "2023-02-01" @default.
- W4313560129 modified "2023-10-17" @default.
- W4313560129 title "Model experimental study on the failure mechanisms of a loess-bedrock fill slope induced by rainfall" @default.
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- W4313560129 doi "https://doi.org/10.1016/j.enggeo.2022.106979" @default.
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