1) gravel pervious layer
砂砾石透水层
2) sand and gravel aquifer
砂砾石含水层
1.
A new kind of testing method being used to determine compressive values of a sand and gravel aquifer buried greatly and having a high confined water head is presented.
介绍了一种新的确定大埋深、高承压砂砾石含水层失水压缩量的方法。
4) gravel
[英]['ɡrævl] [美]['grævḷ]
砂砾 碎石 砂砾层
5) gravel stratum
砾石层，砂砾层
6) sand gravel stratum
砂卵砾石层
1.
Whether the natural sand gravel stratum in the river bed would serve as the foundation of the superhigh faced rockfill dam or not was one of the key technical problems of the project.
河床天然砂卵砾石层能否作为超高面板坝坝基是该工程的关键技术问题之一。
补充资料：透水层
透水层
permeable layer
tous卜u一eeng透水层(permeable layer)重力水可以自由透过的岩、土层。透水层的透水能力取决于岩、土层空隙的大小和连通程度、空隙的多少和形状。衡量岩、土层透水能力强弱的定量指标为渗透系数，渗透系数越大，岩、土的透水能力越强。自然状态下岩、土的透水强弱程度见表。 各种岩、土的透水程度……还到呼噩班犷三二 (蒋建明)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条