Abstract
AbstractThis paper presents a numerical study using three-dimensional (3D) finite-element (FE) analyses for slopes that contain a weak thin layer and are reinforced with piles. The presence of a thin weak layer usually has a negative effect on slope stability. In the FE analysis, a strength reduction technique is employed using FE software. In the numerical model, an elastic-perfectly plastic with Mohr-Coulomb failure criterion is used for the soils. The pile is assumed to be an elastic member, without considering failure. Some of the effective factors, such as the optimal pile location and pile length, were verified beforehand using two-dimensional (2D) FE analysis. The spacing effect of the pile, S/D=4.0 (S is on-center spacing; D is diameter), is found to be comparable for the 3D model in relation to the 2D model. The appropriate length of the pile used in the 3D analysis is based on the length of piles typically used in engineering practice. It is concluded that proper stabilization can be provided if...
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