STUDY ON A DISTRESSED HIGH CFRD WITH FACE SLAB RUPTURE
In recent years, face slab rupture has occurred on several high CFRDs,resulting in large leakage and even potential safety problems.In this paper, a case study on a distressed high CFRD (H=135.8m) in China is conducted to illustrate mechanism analysis of the face slab rupture by using numerical analysis.It is found that large deformation and differential deformation of rockfill, cavity zones under face slab, and structural defects of joints are the most important causes of the face slab rupture.Based on the monitoring data,the deformation and leakage of the dam are analyzed for evaluating the dam performance before the rehabilitation and predicting that the leakage of the dam after the rehabilitation will decrease by at least 80%.Rehabilitation measures are proposed and adopted for repairing the ruptured slabs and joints as well as the damaged waterstops.The leakage of the dam has decreased to less than 20% compared with the value for the same water lever before rehabilitation, which is consistent with the previous prediction.Finally, conclusions are drawn, including the suggestions for dealing with the face slab rupture issue of high CFRDs.
face slab rupture CFRD safety evaluation leakage
Yao Xu Jinsheng Jia Jutao Hao
China Institute of Water Resources and Hydropower Research (IWHR), Beijing, China
国际会议
The 3rd International Conference on Service Life Design for Infrastructure(2014第三届基础设施服役寿命设计国际会议)
珠海
英文
33-42
2014-10-15（万方平台首次上网日期，不代表论文的发表时间）