Evaluation of long-term settlement of ghoocham dam by numerical analysis

Ghoocham dam is 45 m height ECRFD type with a vertical clay core and soft alluvial and rock foundation under construction in west of Iran. To obtain the settlement distribution in dam body and foundation during different stages of construction, end of construction, first impounding and steady state, numerical analysis was conducted using a material behavior model including a combination of non-linear elastic Duncan and Chang model and elastic- perfectly plastic Mohr-coulomb. Numerical analysis was carried out by FLAC2D which is explicit finite difference software. The material behavior model is implemented in numerical finite difference code, FLAC2D, using its built-in fish language and plane strain analysis carried out to obtain deformations and stresses within dam body and foundation. The results show that the distribution of settlements of dam body and foundation are in acceptable ranges.

Keywords:

Rockfill dam , hyperbolic model , non-linear behavior , soft foundation , numerical analysis