一、概况为了加快农田水利配套建筑物的速发,我们吸取了二铰桁架拱桥、三铰板拱桥的特点,先后建成一批新型的农村机耕桥——钢筋混凝土三铰斜杆式桁架拱桥。该桥由预制的桁架拱片,在拱顶设置钢筋混凝土简化铰,嵌上微弯板,复浇桥面而成。三铰桁架拱桥是静定结构,设计原理简明,易于为一般技术人员掌握。 I. Overview In order to speed up the rapid development of irrigation and water conservancy facilities, we have learned the characteristics of two-hinged truss arch bridge and three-hinged arch bridge and built a batch of new type of rural plow bridge-reinforced concrete three-hinged oblique-bar truss arch bridge. The bridge by the prefabricated truss arch, set in the vault to simplify the hinges of reinforced concrete, embedded micro-bent plate, made of pouring the bridge. Three hinge truss arch bridge is static structure, the design principle is concise, easy to master for general technicians.