LABORATORY STUDY ON BEHAVIOUR OF UNSATURATED SOIL IN EARTH-ROCK-FILL DAMS CORE

摘要

The earth-rock-fill dams are constructed with many layers and the core of dams is unsaturated in construction period. The whole load of dams is divided into several increments in the calculation of stress and deformation. It can be supposed that the increment is added instantaneously and then the dam is consolidated some times under the increment. Thus, the parameters for calculation can be taken from the consolidated un-drained tri-axial compression test. The result of test can show the characteristics of consolidation and stress-strain relationship and lateral deformation. The law about the volume strain with time in consolidation processing is discussed in this paper. Also, the hyperbolic model for tangent Poisson ratio is presented.