Location
Arlington, Virginia
Date
14 Aug 2008, 4:30pm - 6:00pm
Abstract
Dispersive clays can easily be eroded when they contact with water having high percent dissolved sodium ion in pores. Colloidal clay minerals in these types of soil produce suspension even in stagnant water by dispersion and decomposition. Use of dispersive clays as an impervious material in embankments and dams can cause serious problems of internal erosion (piping) and failure induced by these problems. In this paper, impervious material areas of Arsuz Gönençay dam are discussed as an example of evaluation of usability of dispersive clays in dam fills. The dam type was selected as zoned earth fill at the stage of feasibility. 80 test pits having the depth of 2.1-7.5 m were performed. In order to determine the engineering characteristics and dispersive properties of impervious soils, samples taken from these pits were tested by using description and engineering tests, pore water analysis, double hydrometer, pin-hole and crumb tests. In case of a stability problem due to dispersibility, design of the embankment of Arsuz-Gönençay dam is revised by the design of clay core with an envelope zone at the downstream, upstream and foundation parts.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
6th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2008 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Aydin, Ayşe and Özgüler, Eray, "Evaluation of Dispersive Properties of Clays to be Used in Embankment of Arsuz - Gönençay Dam" (2008). International Conference on Case Histories in Geotechnical Engineering. 20.
https://scholarsmine.mst.edu/icchge/6icchge/session02/20
Evaluation of Dispersive Properties of Clays to be Used in Embankment of Arsuz - Gönençay Dam
Arlington, Virginia
Dispersive clays can easily be eroded when they contact with water having high percent dissolved sodium ion in pores. Colloidal clay minerals in these types of soil produce suspension even in stagnant water by dispersion and decomposition. Use of dispersive clays as an impervious material in embankments and dams can cause serious problems of internal erosion (piping) and failure induced by these problems. In this paper, impervious material areas of Arsuz Gönençay dam are discussed as an example of evaluation of usability of dispersive clays in dam fills. The dam type was selected as zoned earth fill at the stage of feasibility. 80 test pits having the depth of 2.1-7.5 m were performed. In order to determine the engineering characteristics and dispersive properties of impervious soils, samples taken from these pits were tested by using description and engineering tests, pore water analysis, double hydrometer, pin-hole and crumb tests. In case of a stability problem due to dispersibility, design of the embankment of Arsuz-Gönençay dam is revised by the design of clay core with an envelope zone at the downstream, upstream and foundation parts.
