Uplift Pressure below Gravity Dams on Rock

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by B. Alex Grenoble, Univ of Colorado, United States,
Bernard Amadei, Univ of Colorado, United States,
Tissa H. Illangasekare, Univ of Colorado, United States,

Document Type: Proceeding Paper

Part of: Waterpower '89:

Abstract: The magnitude of the uplift force at the base of a concrete gravity dam founded on rock is strongly dependent on the properties of the discontinuities within the rock mass. This paper discusses a two-dimensional finite element model which determines the water pressure distribution throughout a jointed rock mass as a function of the joint properties. The results of a study designed to investigate the influence of a variation in joint orientation on uplift are presented. The contribution of foundation drains in reducing uplift is also considered.

Subject Headings: Gravity dams | Rock masses | Uplifting behavior | Rock properties | Two-dimensional models | Earthfill dams | Water pressure | Joints |

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