Abstract: This paper is aimed to the scour toe of the subgrade river side at concave bank, the prtection mechanism、laws and effects of the apron and the spur-dike are studied based on hydrokinetics analysis and experiments. The main effect parameters and the calculation method of the apron protection are raised on the basis of the model test and the spot observation. Meanwhile, the change laws of scour depth and arrangement method for spur-dike in bend channel are concluded, and design basis are provided for the scour protection to subgrade river side at concave bank.

Key words: scour, apron, protection, spur-dike

摘要： 运用水力分析和试验观测的方法,针对沿河弯凹岸路基坡脚冲刷的护坦和丁坝防护机理、特点以及防护效果进行了研究.根据试验和现场调查资料,提出了防护的主要影响参数.在室内试验和现场观测的基础上,提出采用防坦防护的设计计算方法.同时,对弯道中丁坝冲刷深度的变化特点以及布设要求进行了分析归纳,为沿河弯凹岸路基冲刷防护型式的选择和布设方法提供了参考依据.

关键词: 冲刷, 护坦, 防护, 丁坝