一、前言弯道水流不仅广泛存在于大江大河中,在人工水道(如水闸引河等)也屡见不鲜.弯道水流对国民经济危害极大,包括土地资源损失,威胁堤防安全,封堵引排口门(在凸岸处)等.在人类历史上,为解决弯道水流所引起的河岸侵蚀和河道整治问题,曾进行了长期不懈的探索,采取了各种各样有效的工程措施.我国常用的护岸方法如丁坝、平顺抛石等,都有一定局限性,有待改进和发展.近年来,很多国家都在积极研究河床演变过程和控制河床的新技术,设计和研制出各种旨在稳定水流结构以及有效控制泥沙运动和河床变形的新型建筑物,导流屏即为其中之 First, the prelude Bend flow is not only widespread in the rivers, in the artificial waterways (such as water diversion, etc.) are also uncommon.Colleges and rivers on the great harm to the national economy, including the loss of land resources, threatening the dike safety, sealing the exhaust port Door (at the convex bank), etc. In the history of mankind, a series of effective engineering measures have been taken to solve the problem of riparian erosion and river regulation caused by the flow of curved water. Such as Dingba and smooth riprap, have some limitations and need to be improved and developed.In recent years, many countries are actively studying the river bed evolution process and control of the river bed of new technologies, design and development of various designed to stabilize Water flow structure and effective control of sediment movement and river bed deformation of the new building, the screen is one of the diversion