During the filling process, the compressive stress of the dam in the sealed region increases in the arch direction while that in the cantilever direction decreases, which reveals an enhancement of dam thrust into the two banks. The foundation settles as a consequence of consolidation of the reservoir bed under the effect of the water mass. Throughout this study, it is concluded that: (1) changes of the hydrostatic load resulting from the filling process have a significant effect on the deformation and stress states of the dam and foundation. The results obtained from the various numerical analysis cases for different impounded water levels are comprehensively compared with those obtained from the field monitoring. The numerical modelling is conducted by the three-dimensional nonlinear finite element method, which takes into account the nonlinear contact of the transverse joints between dam monoliths and adopts both the design and feedback parameters of the dam. ![]() Effects of the first filling process of the Xiluodu super-high arch dam are studied by both field monitoring and numerical modelling methods.
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