Consolidation of double‐layered ground with vertical drains

Abstract

SUMMARYVertical drains are usually installed in subsoil consisting of several layers. Due to the complex nature of the problem, over the past decades, the consolidation properties of multi-layered ground with vertical drains have been analysed mainly by numerical methods. An analytical solution for consolidation of doublelayered ground with vertical drains under quasi-equal strain condition is presented in this paper. The main steps for the computation procedure are listed. The convergence of the series solution is discussed. The comparisons between the results obtained by the present analytical method and the existing numerical solutions are described by "gures. The orthogonal relation for the system of double-layered ground with vertical drains is proven. Finally, some consolidation properties of double-layered ground with vertical drains are analysed.

Consolidation by vertical drains under time-dependent loading

“…According to the orthogonal relation of the system [16,17] and the initial condition, Equation (13a), A K can be obtained as…”

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

“…Hence, a system of vertical drains combined with vacuum preloading is an effective method to accelerate soil consolidation by promoting radial flow. 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].…”

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