Analysis of consolidation of a soil layer with depth-dependent parameters under time-dependent loadings

作者：Xu, Changjie; Chen, Qizhi^*; Liang, Luju; Fan, Xiaozhen

来源：European Journal of Environmental and Civil Engineering, 2018, 22(sup1): s200-s212.

DOI：10.1080/19648189.2017.1385539

• Non-linear consolidation
• clay
• Laplace transformation
• depth-dependent parameters
• time-dependent loading

In this paper, a Laplace transform method is proposed to solve the one-dimensional consolidation problems considering depth-dependent parameters of the soil layer, which is subjected to complicated time-dependent loadings at ground surface. The coefficient of volume compressibility and the coefficient of permeability for the soil layer are continuous functions of vertical coordinate. The solution is obtained and described in detail. The characteristics of consolidation under suddenly imposed constant loading are analysed. The results show that the excess pore pressure distribution of a soil layer with depth-dependent parameters is dissimilar to the solution Terzaghi has proposed. The characteristics of consolidation under time-dependent loadings are also analysed and the influences of depth-dependent parameters are considered. The results also suggest that the effective stress develops with time under time-dependent loading follows the trend under suddenly-imposed constant loading but exhibit certain oscillations. The oscillation amplitudes of the effective stresses don't decrease with time. Therefore, it is inaccurate to simplify the cyclic loading to constant loading.

• 出版日期2018
• 单位浙江大学