Abstract
This paper presents a stability parametric analysis of a 59m high embankment dam. The analysis was performed in order to evaluate the minimum values of strength parameters that satisfy the stability requirements of the dam. The parametric analysis was conducted for three main zones of the dam: upstream shell, core, and downstream shell, which consisted of sandy gravel, clay, and random fill respectively. The friction angles of these materials were gradually decreased in order to represent different soil conditions. It was observed that stability requirements for the end of construction and after the filling of the reservoir could be satisfied if friction angle values of the sandy gravel and the random fill are 34º and 32º, instead of 37º and 34º. However, the value of the core’s cohesion could be utilized as 30º without any reduction so that the dam could be safe after the filling of the reservoir. The results of this study could be beneficial to practicing engineers for the design of safe and economical embankment dams.
Highlights
Embankment dams are large structures that require huge volumes of fill materials
There is a need for more case studies that could address issues related to the safe and economical design of embankment dams, based on parametric analysis of local soils
This paper presents the parametric analysis of the effect of soils’ strength properties on the stability of an embankment dam, the Nai Gaj dam
Summary
Embankment dams are large structures that require huge volumes of fill materials. Many different sources of fill materials are identified within the boundaries of the embankment dam for economical purposes. Parametric analysis is required in order to evaluate minimum strength and stiffness properties range of soils, which could be utilized for the safe and economical design of embankment dams [1,2]. There is a need for more case studies that could address issues related to the safe and economical design of embankment dams, based on parametric analysis of local soils. This is because every dam is considered as a unique structure based on its design, materials used, and foundation geology
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