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摘要: 塌岸是一个长期的渐进过程。现阶段工程中塌岸预测的范围仅仅是指塌岸的最终状态。本文通过物理模拟试验来揭示塌岸发展的一般过程和时间效应。结果表明,塌岸的发展演化经历了从初始阶段的表层迅速被冲刷→浅层磨蚀→深层缓慢地掏蚀与坍塌,直到最后波浪无法作用于水上坡体而趋于稳定的过程。塌岸过程具体可划分为4个阶段:表层冲刷阶段、浅层磨蚀阶段、深层掏蚀与坍塌阶段、岸坡稳定阶段。岸坡稳定条件为:水下坡体和水上坡体达到稳定坡角,波浪不能再通过涨落带对坡体变形破坏造成影响。Abstract: Bank collapse is a long lasting development process.The prediction of the bank collapse in engineering usually considers only the final condition.This paper showed the time effect and developing process of the bank collapse by the physical modeling test.The result showed that the evolution process of bank collapse past the wave scoured at the face layer at first,abrasion of the shallow layer then,excavation of the deep part and collapsed,at last the collapse ended at stable condition when the wa...
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Key words:
- bank collapse /
- time effect /
- physical modeling /
- stability of bank
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