Cable-stayed bridge with tensioned mid-span main beam

Abstract

The invention relates to a bridge structure and particularly relates to a cable-stayed bridge with a tensioned mid-span girder. The bridge comprises at least two bridge towers, mid-span stay cables, stay cables with side spans anchored on the ground, stay cables with side spans anchored on girders, mid-span girders, side-span girders, ground anchoring structures of side-span stay cables and expansion joints, wherein the number of bridge towers is at least two, an upper end of the mid-span stay cable is anchored on the bridge towers, a lower end is anchored on the mid-span girder, upper ends ofthe side-span stay cables are anchored on the bridge towers, lower ends of a part of the side-span stay cables are anchored on the side-span girders, lower ends of the other side-span stay cables areanchored on the ground anchoring structures, the girder is continuous, and the expansion joints are arranged between the ground anchoring structures of the side span girders and the side span stay cables. The cable-stayed bridge is advantaged in that the side span is short, the mid-span girders are tensioned, compared with a bridge in the prior art, the cable-stayed bridge is low in manufacturingcost, high in driving comfort, small in influence on the environment and more suitable for railway cable-stayed bridges and cable-stayed bridges jointly constructed by highways and railways.

Description

technical field [0001] The invention relates to a bridge structure, in particular to a cable-stayed bridge whose mid-span main girder is under tension. Background technique [0002] In difficult and dangerous mountainous and canyon terrains, due to the constraints of terrain, traffic, and geology, the construction of arch bridges is costly, risky, and has a long construction period. At this time, cable-stayed bridges often become a more suitable structural solution. When the cable-stayed bridge is limited by terrain and geological factors, and cannot set a long enough side span, the conventional cable-stayed bridge form with all main girders self-anchored is adopted, such as figure 1 shown. A cable-stayed bridge whose girders are all self-anchored requires a large amount of foundation excavation to set up side spans, resulting in a lot of engineering waste and great damage to the environment. [0003] In order to solve the shortcoming of long side spans caused by the form ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: in order to avoid the side span being too long in the prior art, a drawer beam or corbel is set in the middle of the mid-span main girder, which makes the bridge costly, easy to damage, and post-maintenance and repair work To solve the problems of large traffic volume and poor driving comfort, a cable-stayed bridge with a mid-span main girder under tension is provided

Images