Evaluation of Gelabar Earth Dam Behavior during Construction and First Watering by the Method of Limited Components and Comparison with Real Amount Resulted by Precise Instruments Data

Abstract

The increase in pore water pressure in earth-rock fill dams with clay core during construction and first watering can cause the start and progress in hydraulic fracture. Construction costs being high and also the damage caused by dams’ fracture make the necessity of taking care and behavior survey of earth dams, more obvious than anything. According to this, in this research while modeling Gelabar earth dam, pore water pressure, pore water pressure ratio, the amount of total stress and effective stress, arching and lateral soil pressure ratio is measured and has been compared with the amount measured by precise instruments which has the construction capability of Plaxis v8.5 for numerical modeling from two –dimensioned software, has been used. Behavior models used in this analysis, Moher- Coulomb and it is xis v8 hardening. Considering the data of precise instruments installed on Dam’s body and implementing return analysis, real parameters of construction materials was obtained. Evaluation of numerical modeling results and precise instruments can find out an appropriate Dam behavior and consequently, the correct modeling procedure. Also, studies have been indicator of suitable stability and safe position for Gelabar Dam.