Multidirectional rotational symmetric cable-stayed bridge structure with central roundabout and construction method

Abstract

The invention discloses a multidirectional rotational symmetric cable-stayed bridge structure with a central roundabout and a construction method. The multidirectional rotational symmetric cable-stayed bridge structure comprises a central bridge tower, the central roundabout and N bridge span structures, wherein N is greater than or equal to 2. The center bridge tower comprises N tower limbs and a plurality of tower limb connecting structures. The central roundabout is coaxially arranged on the periphery of the central bridge tower, and piers are arranged below the roundabout. The N bridge span structures are evenly distributed on the periphery of the central roundabout in a radial mode, and road intercommunication is achieved through the central roundabout. The bridge span structure mainly comprises bridge span main beams in N directions, and the central axes of the bridge span main beams and the corresponding tower limbs are located on the same vertical plane. Each bridge span main beam is connected with the corresponding tower limb in a tensioning mode through a stay cable. The multi-direction rotational symmetric cable-stayed bridge structure with the central roundabout is adopted, reasonable stress of the bridge towers, the bridge span structure and the roundabout is guaranteed, meanwhile, the motor vehicle passing capacity of the multi-way intersection is improved, people and vehicle separation is achieved through the viaduct form, and traffic safety and passing efficiency are improved.

Description

technical field [0001] The invention relates to a cable-stayed bridge structure and a construction method, in particular to a multi-directional rotationally symmetrical cable-stayed bridge structure with a central ring island and a construction method. Background technique [0002] With the rapid development of my country's economic construction, the road traffic volume is increasing, and the traffic efficiency at the intersection of urban roads is particularly worthy of attention. The traffic flow here is dense and the smoothness of traffic is poor. The most common solution is to use viaducts to provide multi-directional traffic, or to ease the conflict points of traffic flow through roundabouts. However, if a multi-directional intersection requires a bridge structure with a large span (eg, greater than 50m) to achieve multi-directional interconnection, there are few bridge options available. [0003] Urban cable-stayed bridges often play an important role in urban constru...

AI Technical Summary

Problems solved by technology

However, how to apply cable-stayed bridges to multi-directional intersections to solve the traffic functions of multi-directional intercommunication and take into account the mechanical characteristics remains to be studied

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