Abstract
Finite element method has been used to study the behavior of soil excavation. The solutions were generally obtained assuming linear elastic soil behavior. However, this paper treats the soil as an elastic-plastic medium. The simulation techniques used in the braced field excavation are presented first and then, in order that a converged solution can be obtained, an iteration solution technique called the mixed stiffness method is used in the incremental nonlinear finite element analysis of the field problem where the soil behavior is simulated as elastic-plastic by employing the Drucker-Prager model. The solution techniques and procedure presented can be applied to future soil excavation problems.
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