Consolidation settlement occurs mainly in clays or silts . 压缩沉降主要出现在粘土或粉沙中。
2.
Channel deposits, consisting of sand, silt and clay, fill the valleys cut by a river system . 河道沉积由砂，粉沙和粘土组成，充填于河流切割的河谷之中。
3.
Hydraulic fill dams are built of sand and silt brought into the dam in a stream of water, usually through a pipe . 水力冲填坝通常是用一根管子利用水流把砂和粉沙运到坝体处筑坝。
4.
Discussion on method of testing of performance of concrete against chlorine infiltration 从京唐港大风期骤淤浅议粉沙质海岸建港布置和航道选线
5.
The bulk density was 1 . 2 g cm - 1 . the soil contents about 60 % of silts and about 15 % of clays . a slope adjustable flume of 3 by 8 m was subdivided into 15 mini - flumes of 0 . 2 by 8 m 土壤颗粒以粉沙为主，粉沙粒占总量的60左右，粘粒约占15左右，容重约为1 . 2gcm ~ ( - 1 ) ，试验前将土样风干并过1 1cm的粗筛。
6.
Study indicated that establishing salix psammophila checkerboard can effectively keep the earths surface from coarsening , because salix psammophila checkerboard can obviously increase the fine sand and clay sand of soil surface , accounting for 15 . 1 % , 18 . 3 % , powder sand increased by 1 . 8 times 结果表明：设置沙柳沙障的沙丘表层细沙含量比对照样地提高15 . 1 % 、粘粒提高18 . 3 % 、粉沙含量是对照地的1 . 8倍，说明设置沙柳沙障能够增加沙丘表层细颗粒含量，有效控制地表粗化。
7.
The main results are following : ( 1 ) the variation of clay / silt ratio can indicate the secondary clay action of dust depositions ; the variations of magnetic susceptibility and total fe content are inferred to be records of the changeable intensity of bio - pedogenesis ; the variations of sr content and rb / sr ratio can indicate bio - pedogenesis , dissolving and leaching action ; the content of total organic carbon ( toc ) can reflect variation of climate and vegetation during soil formation , it indicates the intensity of weathering and bio - pedogenesis ; the content variation of caco3 can show the intensity of dissolving - leaching action and secondary deposit , which was noted as pseudomycilia in pores and fissures in the sediment , so it can indicate the intensity bio - pedogenesis quite well . these proxy indexes also reflect obvious regional difference of pedogenic environment and the intensity bio - pedogenesis ; namely , secondary clay action , dissolving - leaching action and bio - pedogenesis are all much stronger in south than that in north 实验结果表明：粘粒粉沙比值能很好地指示粉尘堆积物的次生粘化作用；磁化率和全铁很好地指示生物风化成壤作用； sr和rb sr比值能很好的指示生物风化成壤作用和淋溶作用；总有机碳( toc )含量的高低，在一定程度上反应了土壤发育过程中气候和植被状况的变化，指示着成壤过程中腐殖质化的程度； caco3含量的变化，可以反映了黄土古土壤形成时的风化成壤作用的强弱程度，指示成壤过程中的淋溶作用和次生碳酸盐化作用；并且各指标所指示的成壤环境和成壤强度存在明显的区域差异，即渭河流域土壤的生物风化成壤作用、次生粘化作用和淋溶作用均表现出南部强于北部。
8.
The function of desert microbiotic crusts in erdos was analyzed , the results ahowed that : microbiotic crusts consist of fine sand and thick powder sand , but differs with the wind - drift sand , wind - drift sand are coarse sand and fine sand ; microbiotic crusts influence the rainfall distribution again and effect on the evaporation of infiltration moisture ; microbiotic crusts has the power of water conservation and the function of enrichment of nutrients 摘要本文对鄂尔多斯沙漠生物结皮作用进行了初步研究，结果表明结皮层的机械组成以细沙和粗粉沙为主，而流沙以粗沙和细沙为主；生物结皮层影响降水的再分配作用，并影响入渗水的蒸发规律；生物结皮层县有较好的保水特性和养分富集作用。
