中文摘要：

堆石料的流变变形会增加坝体运行期的总体沉降进而影响面板堆石坝运行期的安全性。坝体堆石填筑完成后的变形稳定时间对之后修筑的面板的应力和变形具有一定影响。从应力和变形角度,变形稳定时间越长对面板堆石坝的安全性越有利,然而延长变形稳定时间会导致施工期变长和工程投资的相应增加。本文针对积石峡面板堆石坝进行了三维流变变形计算,分析了流变变形对大坝应力变形的影响;研究了不同变形稳定时间大坝应力变形的响应;并基于计算结果对施工期优化给出了初步的建议。

英文摘要：

Settlement and lateral deformation of a CFRD are relatively large due to the creep deformation of rockfill materials at the operation stage,stress and deformation in the face slab are accumulated at this stage,so the safety of a CFRD becomes a crucial issue.On the completion of rockfill construction,a certain period is needed for stabilization of deformation,and a longer stabilization is favorable to dam safety,while the cost would grow correspondingly.In this paper,a three dimensional analysis of creep deformation is conducted for the Jishixia CFRD,focusing on the effect of different stabilization periods.Based on the results an optimal scheme for rock-fill construction is suggested.