水库塌岸时间效应的物理模拟研究  

The study of the time effect of bank collapse by physical modeling

作　　者：许强[1] 陈建君[1] 张伟[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《水文地质工程地质》2008年第4期58-61,共4页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金委员会;二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(50579099)

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。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 wave couldn＇ t work at the slope above the water. The process of bank collapse can be divided into four stages： scoured at the face layer, abrasion of the shallow layer, excavation of the deep part and collapse, bank reaches stable state. The conditions of the bank reaching stable state are： the slope reached the stable angles and the wave couldn＇t work at the slope after it.

关 键 词：塌岸 时间效应 物理模拟 岸坡稳定 

分 类 号：P642.21[天文地球—工程地质学]