Folding-tower-type cable-stayed bridge with openable deck

Abstract

The invention discloses a folding-tower-type cable-stayed bridge with an openable deck. The bridge comprises a steel folding tower, a steel main beam, a rotation system, an anchor sliding system, a concrete main pier and a concrete side pier, wherein the rotation system comprises a stay cable, a folding tower back cable, a tower cable rotating hinge, a back cable tensioning system device, a beam pier rotating hinge and a tower pier rotating hinge, the anchor sliding system comprises a movable anchoring structure, a horizontal movable box chamber, a horizontal steel slide way and a tetrafluoroethylene steel slide block, the front surface of the steel folding tower is connected with the steel main beam through the stay cable, and the back surface of the steel folding tower is connected withthe movable anchoring structure through the folding tower back cable bypassing the tower cable rotating hinge. According to the bridge, the special achieving scheme of the navigation clearance limit requirement is met, the subtle mechanical balance is achieved through the reasonable arrangement of the cables and the towers, the rotation of the steel folding tower is directly realized through vertical-direction tensioning of the folding tower back cable tensioning system device and horizontal sliding of the movable anchoring structure, and opening of the steel main beam bridge deck is indirectly realized.

Description

technical field [0001] The invention relates to the technical field of bridge engineering in the transportation infrastructure industry, in particular to a cable-stayed bridge with foldable towers with openable deck. Background technique [0002] With the continuous and rapid development of China's economy, the process of urbanization and industrialization has been accelerating, and the transportation infrastructure industry has developed rapidly. A large number of municipal roads, highways, railways and rivers have formed spatial intersections. Considering that the navigation conditions of rivers need to be reserved for the development of the next few decades, the requirements for the navigation limit are often high. Combined with the dense urban environment and the existing complicated site conditions, if the elevation of the whole line is raised or the elevation of the roadbed is raised to meet the requirements of the river navigation limit at a specific location , It wil...

AI Technical Summary

Problems solved by technology

In addition, folded-tower cable-stayed bridges have been built in some projects at home and abroad in recent years. The cable towers of this kind of bridges are bent and the back cables are arranged in a diagonal line. If the external anchor system is used, since the back cable is oblique, the anchorage and the fixed pier foundation will act on a pair of longitudinal component forces with opposite directions and a large magnitude, which is extremely unfavorable to the anchorage and fixed pier foundation

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