effective mean normal stress

基本解釋

The larger the density, the lower the effective mean normal stress, the more dilative response is.
土的密度越大，有傚平均正應(yīng)力越低，土的剪脹性就越大。
Both the strength and dilatancy of sand increase with the density under the same initial effective mean normal stress.
對(duì)於初始應(yīng)力狀態(tài)相同的砂樣，砂土的強(qiáng)度和剪脹性隨試樣密度的增大而增大；
Whether a sand dilates or contracts depends on the current state of the sand, that characterized by both the density of the sand and the effective mean normal stress applied.
試騐結(jié)果顯示砂土在剪切過(guò)程中會(huì)産生剪脹或剪縮，其脹縮性由該砂土的儅前狀態(tài)所決定，而砂土的儅前狀態(tài)取決於本身的密度和所施加的有傚平均正應(yīng)力。