一、前言 我国幅员辽阔、土质复杂,在铁路桥涵设计中,常遇到粘性土河床的桥基冲刷与埋置深度问题。但直到目前,对粘性土桥渡冲刷的研究甚少。为此,铁道部第一、二、三、四设计院,大桥工程局和铁道部科学研究院共同组成了“粘性土桥基冲刷与埋深研究”专题组。经 I. Introduction China has a vast territory and complex soil. In the design of railway bridges and culverts, it often encounters the problem of embankment flushing and embedding of cohesive soil beds. However, until now, little research has been done on the cross-erosion of cohesive soil. To this end, the Ministry of Railways I, II, III, IV Design Institute, Bridge Engineering Bureau and the Ministry of Railways Science Research Institute jointly formed a “cohesive soil erosion and depth of the bridge foundation” group. through