Stability of Concrete Dam: Case History

Abstract

The stability of Claytor Dam was reevaluated under probable maximum flood conditions. The structure is a concrete gravity dam with a gated spillway. The foundation is karstic limestone that was treated before construction. The anchor wall at the upstream face of the dam plays an important role in the stability of the structure. The pressure relief wells' efficiency is examined in detail as well as the hydraulic conditions used in the stability analyses. Drilling and laboratory test results of rock and concrete including direct tensile tests of the critical core‐rock interface are described. Stability analysis using two different uplift assumptions are discussed and a method of determining the increase head above tailwater level at the line of drains caused by flooding conditions are given.