A study on one-dimensional nonlinear consolidation of double-layered soil

Nonlinear Analysis for a Single Vertical Drain Including the Effects of Preloading Considering the Compressibility and Permeability of the Soil

“…Figure 4 shows the difference between the degree of consolidation based on excess pore water pressure dissipation (U p ) and the settlement (U s ) with different construction time factor vc T , respectively. For the same time factor ( v T ), U p is always less than U s , similar to the one-dimensional nonlinear consolidation theory obtained by Cai et al (2007), Geng et al (2006) and Xie et al (2002). This also shows that the settlement based on U s occurs at a slightly higher rate than the settlement based on U p .…”

“…However, all the existing theories still consider the coefficients of permeability and compressibility to be constant during the consolidation process (Basak and Madhav 1978;Cai et al 2007; Davis and Raymond. 1965;Geng et al 2006;Xie et al 2002). Using the equal strain theory, Olson (1977) obtained a solution for the case of vertical drain under a ramp load, and Lekha et al (1998) proposed a modified approach capturing radial drainage.…”

Non-linear Consolidation of Soil with Vertical and Horizontal Drainage under Time-Dependent Loading

“…For the classic vertical drain consolidation theory, a constant coefficient of volume compressibility, a constant coefficient of horizontal permeability and a constant coefficient of vertical permeability were assumed for given stress range [1][2][3][4][5][6]. However, for a relatively large applied stress range, it is known that both soil permeability and soil volume compressibility coefficients decrease as a result of physical reduction in void ratio during the consolidation process [7][8][9][10]. And pre-consolidation pressure is essential for predicting the actual settlement.…”

Analytical Solution for Electroosmotic Consolidation Considering Nonlinear Variation of Soil Parameters

“…Such variations would inevitably affect the development of porewater pressure and surface settlement. Many attempts have been made to derive analytical solutions for traditional 1D consolidation problems considering the nonlinear variations of soil permeability and compressibility (Davis and Raymond 1965;Gibson et al 1967;Gibson et al 1990;Xie et al 2002;Lekha et al 2003;Indraratna et al 2005;Geng et al 2006;Walker and Indraratna 2006;Cai et al 2007;Hu et al 2009;Walker et al 2012;Abuel-Naga and Pender 2012;Zhu and Yin 2012;Hsu and Tsai 2015). However, the analytical solution for electroosmotic consolidation with variable soil parameters has seldom been studied.…”