Session Start Date

6-1-1988

Abstract

The paper presents the results of laboratory and field research, the execution and behaviour under operation of the Rîpa Albastră earth dam, the first Romanian dam with an impervious core achieved by the mechanical mixture of fine-medium sands and bentonite. The dam structure and the geomorphological condition in the area are described. Further, the types of soils extracted from the dam quarry are described, together with their outstanding geotechnical characteristics in both natural and compacted state. The paper continues by describing the physico-chemical properties of seven Romanian bentonites used in laboratory tests, as compared to some foreign bentonites of notoriety, as well as the physical properties of the mixture achieved between bentonites employed in varying percentage and the support material, with special considerations on their permeability. After checking the results of laboratory research in the testing tracks preceding the execution, the paper presents the technology adopted for the achievement of the impervious core. The paper concludes by analysing the results of observations conducted on the dam behaviour by means of piezometric boreholes drilled into the downstream prism, under the conditions of putting into operation the hydrotechnical scheme, with particular consideration for the recorded permeability.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Second Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1988

Document Version

Final Version

Rights

© 1988 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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The Behaviour in Time of Ripa Albastra Dam Impervious Bentonitic Core

The paper presents the results of laboratory and field research, the execution and behaviour under operation of the Rîpa Albastră earth dam, the first Romanian dam with an impervious core achieved by the mechanical mixture of fine-medium sands and bentonite. The dam structure and the geomorphological condition in the area are described. Further, the types of soils extracted from the dam quarry are described, together with their outstanding geotechnical characteristics in both natural and compacted state. The paper continues by describing the physico-chemical properties of seven Romanian bentonites used in laboratory tests, as compared to some foreign bentonites of notoriety, as well as the physical properties of the mixture achieved between bentonites employed in varying percentage and the support material, with special considerations on their permeability. After checking the results of laboratory research in the testing tracks preceding the execution, the paper presents the technology adopted for the achievement of the impervious core. The paper concludes by analysing the results of observations conducted on the dam behaviour by means of piezometric boreholes drilled into the downstream prism, under the conditions of putting into operation the hydrotechnical scheme, with particular consideration for the recorded permeability.