Author(s): A. Sarukhanyan; V. Takomajyan; G. Veranyan
Linked Author(s):
Keywords: Dam; Safety; Stability
Abstract: Sarsang Dam located in Nagorno Karabakh. It's a large dam with a height of 127m. It has been built in an area of seismic activity having high engineering-and-geological conditions and the total storage capacity of the reservoir is 580 million cubic meters. In such conditions development of criteria for assessment of strength and stability of earthfill waterworks ensuring guaranteed reliable operation are most important firstly of safety considerations and secondly securing strength and stability of the structure. Therefore development of assessment mechanisms of safe operation of earthfill hydraulic structures, moreover for high earthfill dams, in seismic active zones is an important and urgent issue. Stability of an earthfill dam is conditioned by physical and mechanical properties of the dam body which during its construction, to a degree, undergo deviation from design specifications. Therefore, the evaluation of the dam strength and stability is directly related to properties of the dam body ground at a given moment of time. Based on these considerations a problem was formulated: to study the Sarsang Dam present ground state. For this reason at the right side of the dam drilling operations were performed starting from the top of the dam. On the basis of laboratory examination of soil samples taken from each 5 metres of 81.5m deep borehole a stress-strain model has been introduced becoming the base for the dam strength and stability computations. The composition of grounds of the dam body and the core, their placement details, results of laboratory examinations, principles of stress-strain models formation, mathematical model of strength and stability computation methods, analyses of computation results and evaluation approaches for strength and stability of the structure have been presented in the work.
Year: 2014