针对山区沿河路基河湾凹岸的护坦防护机理及防护效果进行了研究,指出护坦顶面应低于河床面,其减冲防护效果与护坦宽度BH有关,提出凹岸护坦防护的设计原则和设计计算方法。通过工程实际应用,证明河湾凹岸路基冲刷防护采用护坦基脚式挡土墙或护坦式基脚护坡是一种经济有效、易行的浅基防护型式。 Aiming at the protection mechanism and protective effect of retaining shield on the concave bank of river bank along the riverbed in mountainous area, it is pointed out that the top of shield tunnel should be lower than the riverbed surface and the protective effect of reducing shock is related to the width BH of the shield. Design Principles and Design Calculation Methods. Through the practical application of the project, it proves that the embankment protection on the river bank concave embankment is a kind of economical and effective shallow base protection type which is based on retaining basalt foot retaining wall or retaining base slope.