作为斜槽式溢洪道施工和防护土石坝免受漫顶水流冲蚀的成本低廉的方法,台阶式块体防护有很大的潜力。英国建筑工业研究与情报协会(CIRIA)为了制定设计指南,正在对由苏联通过大量模型研究和原型试验所发展的设计实践进行评价。英国和美国的坝工工程师们对于将台阶式护固块用于辅助溢洪道,以增加现有大坝不足的溢洪道容量,尤感兴趣。本文将讨论这些研究成果和所得到的经验。 As a cost-effective method of chute spillway construction and protection of earth-rock dams from erosion by flood water, stepped block protection has great potential. The CIRIA is evaluating design practices developed by the Soviet Union through extensive modeling and prototype testing in order to develop design guidelines. Dam engineers from the United Kingdom and the United States are particularly interested in using step retaining blocks for aiding the spillway in order to increase the spillway capacity of existing dams. This article will discuss these findings and lessons learned.