Influence of simulation method of water storage process on valley deformation and working behavior of arch dam

Abstract

An obvious deformation of the valley occurs during the construction of a high arch dam. How to reasonably simulate the construction and water storage process of the arch dam, so that the law and magnitude of the valley deformation are closer to the actual situation, is of great significance for understanding the actual working behavior of the arch dam. Based on Jinping I arch dam, in terms of seepage analysis of abutment rock and stress-seepage coupling, this paper adopts different simulation methods to study the valley deformation and its influence on the working behavior of the dam. The results show that when calculating the seepage force based on saturated seepage alone, without considering the coupling of stress and seepage, the valley deformation expands, and the dam stress is relatively high. However, the valley's deformation shrinks when considering the coupling effect of stress seepage. Furthermore, the shrinkage value is significant considering the conversion between unsaturated and saturated seepage and the coupling analysis using only saturated seepage. The valley deformation law produced by different simulation methods varies, and this will also have other impacts on the working behavior of the arch dam.