Valley Movement and Its Influence on Extra-High Arch Dam in the Initial Impoundment Period
The dam abutment valley movement has a significant impact on the structural safety of the extra-high arch dam.On the basis of analyzing the dam abutment valley movement of the Baihetan arch dam,the structural finite element calculation method is used to analyze the influence of the actual valley movement on the arch dam during the initial im-pounding period.Moreover,the sensitivity of the distribution characteristics of valley movement to the arch dam deform-ation influence is studied.The results indicate that the valley movement of Baihetan Hydropower Station during the initial impounding period is relatively small,and the influence on arch dam deformation is limited.The different distribution forms of valley movement have a significant impact on extra-high arch dams,which provides support for further im-poundment.
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