精选优质文档-倾情为你奉上有空看看，当做学英语好了 土的分类soil classificationboulder漂石cobble卵石coarse grained soil(gravelly and sandy)粗粒土gravel石子coarse sand粗砂medium sand中砂fine sand细砂silty sand粉砂fine-grained soil(silty and clayey)细粒土clayey soil粘性土clay粘土silty clay粉质粘土silt粉土sandy silt砂质粉土clayey silt粘质粉土Residual soil 残积土clay minerals 粘土矿物secondary minerals 次生矿物fill (soil) 填土soft clay 软粘土expansive (swelling) soil 膨胀土peat 泥炭frozen soil 冻土over consolidated soil 超固结土normally consolidated soi
