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Behavior of materials for earth and rockfill dams: Perspective from unsaturated soil mechanics

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Abstract

The basis of the design of earth and rockfill dams is focused on ensuring the stability of the structure under a set of conditions expected to occur during its life. Combined mechanical and hydraulic conditions must be considered since pore pressures develop during construction, after impoundment and in drawdown. Other instability phenomena caused by transient flow and internal erosion must be considered. The prediction of the hydromechanical behavior of traditional and non-traditional materials used in the construction of dams is therefore fundamental. The materials used for dam’s construction cover a wide range from clayey materials to rockfill. In a broad sense they are compacted materials and therefore unsaturated materials. A summary of the current level of knowledge on the behavior of traditional materials used in the construction of dams is presented in the paper. Regular compacted materials (with a significant clay fraction), rockfill and compacted soft rocks are studied with more detail. The latter are non-traditional materials. They are analysed because their use, as well as the use of mixtures of soil and rock, is becoming more necessary for sustainability reasons.

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  1. Universidad Politécnica de Cataluña, Barcelona, Spain

    Eduardo E. Alonso

  2. Instituto Superior Técnico, Lisbon, Portugal

    Rafaela Cardoso

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Alonso, E.E., Cardoso, R. Behavior of materials for earth and rockfill dams: Perspective from unsaturated soil mechanics. Front. Archit. Civ. Eng. China 4, 1–39 (2010). https://doi.org/10.1007/s11709-010-0013-6

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