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Title: Random finite element analysis on cement-treated soil layer
Authors: LIU YONG
Keywords: cement-treated soil, random finite-element method, deep excavation, random field generation, deep excavation, non-Gaussian stochastic process
Issue Date: 28-Mar-2013
Citation: LIU YONG (2013-03-28). Random finite element analysis on cement-treated soil layer. ScholarBank@NUS Repository.
Abstract: Deep mixing and jet grouting are widely used for ground improvement in underground construction. The non-uniformity of cement-treated soils is considered in this study. The unconfined compressive strength and Young?s modulus of cement-treated soils in a column is assumed to consist of a deterministic trend and a stochastic fluctuation portion around the trend, treating the latter as a weakly correlated random field. The positioning errors in placing columns are considered in this study as well. The effects of the non-uniformity on mass behavior of the treated ground are examined by random finite element methods. The cement-treated soils are considered as elastic-perfectly-plastic materials with Mohr-Coulomb failure criterion. Strain-softening effects are incorporated to reflect the strain-stress relation of real cement-treated soils. Parametric results show that the lateral bearing capacity of the soil mass decreases with the increase of positioning error and variance of the random field, of which the former is observed to be the main influence factor.
Appears in Collections:Ph.D Theses (Open)

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