Abstract:

The regularities and characteristics of the deformation of Maopingxi protective earth and rockfill dam in the Three Gorges are analyzed in the present paper. Data display that the internal cumulative settlement of the dam is 1.26m, about 1.21% of the dam height. The maximum external settlement is 205mm, and the maximum horizontal displacement is 85mm. The horizontal and vertical displacement values in the center of the river are great while at both banks are small. It's known that the horizontal and vertical displacement are irreversible. By means of statistical regression analysis, it is found that the horizontal displacement is affected by water pressure and aging effect, while the vertical displacement is mainly affected by aging effect instead of water pressure. The displacement rate of the dam has been decreasing year after year, but is still unstable. The dam is in normal working state.

Key words: Maopingxi protective earth and rockfill dam, deformation monitoring, analysis on results 