Cracking of Embankment Dams Under Normal Operating, and Flood Conditions, and the Implications for Internal Erosion and Piping Failure

正常运行和洪水条件下土石坝的开裂，以及对内部侵蚀和管道失效的影响。土石坝的破坏和事故有一半是由内部侵蚀和管涌引起的。从历史上看，大约2%的大坝受到了影响。最常见的侵蚀起因是低应力区的裂缝或水力压裂。该项目将开发预测坝顶干燥和应力引起的裂缝的开口宽度和深度的方法，并评估裂缝是否会在水库水位上升时侵蚀开始之前闭合，或者侵蚀是否会自我限制或继续。

Cracking of Embankment Dams Under Normal Operating, and Flood Conditions, and the Implications for Internal Erosion and Piping Failure. Internal erosion and piping causes half of embankment dam failures and accidents. Historically about two percent of dams have been affected. The most common cause of initiation of erosion is in cracks or by hydraulic fracture in low stress zones. This project will develop methods for predicting the opening width and depth of desiccation and stress induced cracking in the dam crest, and for assessing whether the cracks will close before erosion begins as the reservoir water rises, or whether erosion will self limit or continue.