总溪河大桥主桥结构设计

发布时间：2018-06-15 10:28

本文选题：上承式桁架拱桥 + 钢管混凝土拱肋　；参考：《桥梁建设》2016年05期

【摘要】：总溪河大桥主桥为上承式钢管混凝土桁架拱桥,计算跨径360m。主拱圈采用钢管混凝土与钢管组成的桁架式截面,弦管与腹杆、斜撑均采用新型的"栓焊结合"节点。拱上立柱采用排架式空心矩形截面钢箱结构,柱间采用横撑连接;立柱盖梁采用空心矩形变截面钢箱结构。桥面系采用多主梁形式钢-混结合梁,钢纵梁、钢横梁均为焊接工字形截面;桥面板为普通钢筋混凝土预制板。毕节岸拱座采用扩大基础结合桩基础的形式,都格岸拱座采用常规的扩大基础形式。对该桥进行全桥静力分析,并对毕节岸拱座、钢管混凝土新型栓焊节点、主弦管节点内栓钉进行局部受力和试验研究,结果表明桥梁结构受力均满足规范要求。该桥整体采用无支架斜拉扣挂缆索吊装系统施工。
[Abstract]:The main bridge of Tongxihe Bridge is a steel tube concrete truss arch bridge with a calculated span of 360 m. The main arch ring is composed of concrete filled steel tube and steel tube with truss section, chord tube and web bar, oblique brace are all adopted new type "bolted bonding" joint. The steel box structure with hollow rectangular section is used for the column on the arch and the steel box structure for the hollow rectangular variable section is used for the cover beam of the column. The bridge deck system adopts the form of multi-main beam steel-mixed composite beam, the steel longitudinal beam and the steel crossbeam are all welded I-shaped section, and the bridge deck slab is the common reinforced concrete prefabricated board. The arch base is expanded foundation combined with pile foundation, and the conventional expansion foundation form is used in the arch base of Duqian bank. The static analysis of the bridge is carried out, and the local force and experimental study on the arch base of the bridge, the new type of corrugated joints of concrete-filled steel tube and the internal bolt of the main chord joint are carried out. The results show that the structural forces of the bridge all meet the requirements of the specifications. The bridge is constructed by cable hoisting system without support.
【作者单位】：中交第二公路勘察设计研究院有限公司;
【分类号】：U448.224

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