Abstract

A finite element (FE) numerical simulation of instantaneous and creep deformation of rockfill bodies during the filling and water storage process of a concrete-faced rockfill dam (CFRD) is carried out based on practical experience in Shuibuya. The results show that the existing presettlement control measures are empirically based on 200-m-high CFRDs. To study the presettlement control measures for higher CFRDs, an FE simulation of slab detachment at the top of different stages during the construction of the 300-m-high CFRDs is carried out based on the inflow during the flood season and the optimised construction process. The results show that under the existing presettlement standards, the presettlement time of the rockfill body and filling height difference between the rockfill body and face slab do not meet the deformation control requirements for 300-m-high CFRDs. Furthermore, new presettlement control measures for 300-m superhigh CFRDs are presented based on numerical analysis.

摘要

基于水布垭的实践经验，对混凝土面板堆石坝（CFRD）充水蓄水过程中堆石体的瞬时变形和蠕变变形进行了有限元（FE）数值模拟。结果表明，现有的预置控制措施是基于 200 米高的 CFRD 的经验性控制措施。为研究高层CFRD的预沉控制措施，基于汛期进水和优化施工工艺，对300米高CFRD施工过程中不同阶段顶部板剥离进行有限元模拟。结果表明，在现有的预置标准下，堆石体的预沉时间和堆石体与面板的填充高度差不满足300米高CFRD的变形控制要求。此外，在数值分析的基础上，提出了300米超高CFRD的新的沉降控制措施。