锦屏Ⅰ级水电站开挖边坡稳定性三维有限元分析

Analysis on stability of the spandrel groove high slope of Jinping-I power station using three-dimensional finite element method

采用 3D δ数值模拟方法研究和论证锦屏Ⅰ级水电站拱肩槽边坡的稳定性。重点对坝址区河谷形成过程中河谷应力场进行了模拟分析 ,对河谷现今应力场进行了拟合分析并对拱肩槽边坡在开挖过程中和开挖后的应力、应变场特征和演化规律进行了三维有限元分析。揭示了边坡失稳的可能形式及部位 ,并据此对边坡的稳定性进行分析与评价 ,为边坡的开挖设计和施工提供了科学依据。

This paper adopts the 3D- δ numerical simulation method to discuss and analyze the stability of the spandrel groove high slope of Jinping-I power station.Especially,much more attention is paid to simulate the river valley's stress field during the formation process of river valley,imitate the present stress of the river valley,features of strain field,and evolutional regularities during the process of the excavation and after the excavation are analysed by 3D finite element method.Based on the above-mentioned,the possible failure in stability and its locations have been revealed.By using the above conclusion,the stability of spandrel groove high slope is analysed and evaluated providing scientific basis for the design and constrution of the power station.