西宁进站跨兰西高速特大桥设计

Design of the Pre-stressed Concrete Continuous Beam Arch Composite Bridge

介绍西宁进站跨兰西高速(76+160+76)m预应力混凝土连续梁拱组合桥设计,通过分析阐述连续梁拱组合结构既具有较大的跨越能力,又较好地解决了拱桥的施工架设及其对桥下运营线路的影响;同时拱及吊杆对中跨的加强作用,减小了主梁高度和边跨跨度,降低了桥梁建筑高度,减小了桥梁长度。

This paper introduces the design of the pre-stressed concrete continuous beam arch composite bridge with span of （76 ＋ 160 ＋ 76）m crossing LanXi Highway near the entrance to Xining Railway Station. Through the analysis, it illustrates the continuous beam arch composite bridges like this have good span capability and well solve the disturbance of arch bridge construction to the operation of the lines below the bridges. In the meantime, the strengthening effect of the arches and suspenders on the midspan decreases the height of the main beam and the side span, the height of the bridge as well as the bridge span.