Abstract
Being able to predict cumulative plastic deformation of soil under cyclic loading has been quite a popular subject for researchers both in the past and at present. In this paper, a non-equal interval non-homogeneous exponential grey model NNGM (1, 1) for cumulative plastic deformation has been put forward by improving the traditional grey model GM (1, 1). The proposed model was evaluated by numerous experimental data of existing literatures and found to be valid for a wide range of soils. It is also valid for predicting long-term settlement of subgrade under subway loads and has a better performance than the traditional model GM (1, 1) as well as non-homogeneous exponential model NEM.
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