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通过采用简化湿筛法,分析在不同初始干密度和浸润时间条件下,岩溶区坡面红壤团聚体遇水浸润后稳定情况。结果表明:红壤结构体在浸水初期(前10min)完成大部分崩解过程;试样崩解后MWD值随浸润时间增加近似呈负线性关系;红壤结构体抗蚀性随干密度增加存在“转折干密度”现象;试样崩解后MWD值随初始含水率增加近似呈指数增长。建议对岩溶区坡面红壤采取压实处理,提高表层红壤干密度,增加抗蚀性,减少坡面土壤侵蚀。
By adopting the simplified wet sieving method, the stability of the aggregates of red soil aggregates in the karst area after water infiltration was analyzed under different initial dry density and infiltration time. The results showed that most of the disintegration processes were completed in the red soil structure during the initial 10min immersion time. The MWD value of the red soil structure decreased approximately linearly with increasing wetting time. The corrosion resistance of the red soil structure increased with the increase of dry density, Turning dry density "phenomenon; MWD value of the sample disintegration increases with the initial moisture increases approximately exponentially. It is suggested that the red soil in karst slope should be compacted to improve the dry density of the surface red soil, increase the corrosion resistance and reduce the soil erosion on the slope.