Abstract: Based on monitoring data during construction of Shankou hydropower dam and after storage, using the popular domestic SHEN Zhu-jiang double yield surface elastoplastic model, the finite element back analysis on calculation parameters of dam material used in stress and strain analysis was carried out. The results were consistent with the actually measured value and the distribution of dam deformation was reflected well. The results showed that the dam deformation and stress distribution conformed to the general law of rockfill dam.

Key words: rockfill dam, monitoring data, stress and strain, feedback analysis

摘要： 根据山口水电站大坝施工及水库蓄水后的监测资料，采用国内比较通行的沈珠江双屈服面弹塑性模型，对坝体应力变形分析所用的坝料计算参数进行了有限元反馈分析，分析结果与实测值基本相符，较好地反映了大坝变形的分布状态，表明大坝变形及应力分布符合土石坝的一般规律。

关键词: 堆石坝, 实测资料, 应力应变, 反馈分析