After some initial trials with RCC the first 3 RCC dams were constructed almost simultaneously. The Zaaihoek Dam and De Mistkraal Weir were designed and constructed by DWAF while the Arabie Dam, now called Flag Boshielo Dam, was designed by a consultant and constructed by a contractor for the then Leboa Homeland Government. The latter, a composite dam with a concrete spillway and an embankment ...

The numerical analysis was used to predict the rockfill dam displacement, and model parameters were calibrated using triaxial experiments on scale-down samples. Due scale effect of material, displacements usually underestimated in design phase. This study focused material an extrapolation proposed extrapolate prototype modulus from laboratory modulus. By conducting confined compression experime...

Multi-layer neural networks have been used in this paper for modeling nonlinear behaviour of concrete gravity dams under earthquake excitation. Koyna dam which has been studied extensively by other authors in the past has been studied as test example in this paper too, where the nonlinear response of its crest has been modelled by the proposed algorithm. The main steps of the algorithm are as f...

the main role ofcore in earth dams is to reduce and control the seepage flow through the dam. in order to achieve this purpose, the core material is usually selected from pure or mixed clays.due to very small coefficient of permeability, the clay cores can prevent water leakageeasily. however, pore water pressures developed inside the core during construction, can not be dissipated quickly. as ...

Deformation mechanism in the core rockfill dams with heavy load and high-stress level is difficult to predict control, which one of key problems be solved dam operation safety management control. Aiming at large error obtained by parameter-based functional models (regression model, grey theory etc.) deformation prediction dams, a fractal method its technical process combining variable dimension...

The creep parameters of rockfill materials obtained from engineering analogy method or indoor tests often cannot accurately reflect the long-term deformation high Concrete-Faced Rockfill Dams (CFRDs). This paper introduces an optimized inversion based on multi-population genetic algorithm-improved BP neural network and response surface (MPGA-BPNN RSM). used for are determined by parameter sensi...