Truss girder-arch combined bridge structure and bridge construction method: Fid-Bau Portal

Truss girder-arch combined bridge structure and bridge construction method

SUN QUANLI / XIE GUILAN / GUAN GUANGBO / SUN XIUYIN / HUANG JINGFENG / ZHANG SHUXIAN / TAN JINGWEN

The invention relates to the field of bridge construction, and discloses a truss girder-arch combined bridge structure and a bridge construction method. The truss girder-arch combined bridge structure comprises a main truss, a main arch ring and a suspender; arch feet at the two ends of the main arch ring are fixedly connected with the main truss, and the two ends of the suspender are movably connected with the main arch ring and the main truss respectively; the main truss comprises a plurality of chord members, diagonal web members and vertical web members are arranged between every two upper and lower adjacent chord members, and cross beams are arranged between every two left and right corresponding chord members; a bearing plate is arranged on the cross beam, and the bearing plate and the cross beam form a bridge deck system to bear bridge deck load together; the arch feet of the main arch ring are directly fixed to the main truss, so that the horizontal thrust of the main arch ring directly acts on the main truss, the whole bridge is changed into a stretch bending structure from a bending structure of the main truss, the bearing capacity of the bridge is improved, the span of the bridge can be larger, and the bridge can bear more vehicles.

本发明涉及桥梁建设领域，公开了一种桁架梁‑拱组合的桥梁结构及桥梁施工方法，包括主桁架、主拱圈以及吊杆；主拱圈两端的拱脚与主桁架的固定连接，吊杆的两端分别与主拱圈及主桁架活动连接；主桁架包括多个弦杆，上下相邻的两个弦杆之间设有斜腹杆和竖腹杆，左右对应的两个弦杆之间设有横梁；横梁上设有支承板，支承板与横梁组成桥面系共同承担桥面荷载；通过将主拱圈的拱脚直接固定在主桁架上，使得主拱圈的水平推力直接作用在了主桁架上，桥梁整体上由主桁架的受弯结构变为拉弯结构，提高了桥梁的承载能力，桥梁的跨径可以更大，也能够承载更多的车辆。

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