分层土 meaning in Chinese

layered soil
stratified soil

Semi - analytical solution for vibration of pile with variable section in layered soil
分层土中变截面桩振动问题半解析解的研究
Abstract : this paperpresents a matrix approach for calculating the pile settlement and shaft - load in layeredsoil
文摘:提出了一种通过简单的矩阵运算求算分层土单桩的沉降和轴力的计算方法。
The emphasis of this paper is to analyse the effect of the whole interaction system created by change of the raft thickness
在分析中，上部结构用空间子结构法分析，而分层土用分层总和法求其刚度。