In design of homogeneous earth dam, sudden drawdown of water level is always a control condition for stability of upstreamslope.
在均质土坝设计中，水位骤降通常是上游边坡稳定计算时需控制的工况。
2
This paper introduced the cause reason for freezing damage at upstreamslope protection of the earth dams, as well, prevention measures were discussed, for reference.
对土坝上游护坡冻害的产生原因及防治对策进行了探讨，仅供参考。
3
Since 1970s, the vibroflotation technique was introduced into China for soft foundation strengthening with better results but without application in upstreamslope in sanded shell dams.