潜水桥(submersible bridge)又称沉下桥,是一种开启桥,当有船只通过时,这种桥的桥面会沉入水面以下,船只通过以后桥面会再次升起让车辆行人通过。相对于其他的开启桥,其优点是对船只的高度没有限制,但对吃水深度有限制。

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潜水桥原理图示

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