Mixed type cable-supported bridge

Abstract

The invention relates to a mixed type cable-supported bridge. A main tower adopts a main tower form of a suspension bridge and a cable-stayed bridge; a main beam in a main midspan sling area adopts a steel box beam; a main beam in a stay cable area adopts a steel box beam, a steel-concrete combined beam or a concrete beam; and anchor spans at the two ends adopt pre-stress concrete main beams or other types of main beams. The main tower utilizes the main tower form of the suspension bridge or the cable-stayed bridge or the combination of the suspension bridge and the cable-stayed bridge according to needs of stress and landscape; a steel-concrete combined section is arranged between the steel box beam and the concrete beam; the steel box beam and the concrete beam are connected by steel strands, shear nails and the like to guarantee reliable and smooth force transmission; and the number of auxiliary piers in the edge span stay cable area can be changed according to the requirements of structural stress and rigidity. According to the mixed type cable-supported bridge, a self-anchored suspension bridge is combined with the cable-stayed bridge to take the advantages of the two types of bridges; the span of the formed bridge can reach 2500m; in addition, the mixed type bridge is large in spanning capability and does not need a large-scale concrete anchor, so that the bridge can be built in deep seas and other complicated environments; and the mixed type cable-supported bridge also can be applied to bridges with the span of hundreds of meters.

Description

technical field [0001] The invention relates to a hybrid cable bearing bridge. Background technique [0002] In recent years, with the rapid development of my country's social economy, bridge technology is also making rapid progress, and it is constantly moving towards large spans and deep seas. The maximum span of the suspension bridge that has been built is 1991m, and the span of more than 3000m has been proposed continuously, and even the span of 5000m has been proposed; Cable-stayed bridge for road and rail (4-line railway + 6-lane road). [0003] The ground-anchored suspension bridge has a large spanning capacity, and the span can reach 3000-4000m. However, huge anchorages need to be built at both ends, which is not suitable for construction under complex environmental conditions such as deep oceans; self-anchored suspension bridges do not need to build huge anchorages. , but the span can’t be very large, it can only be about 1000m, otherwise the main cable anchorage ...

AI Technical Summary

Problems solved by technology

[0003] The ground-anchored suspension bridge has a large spanning capacity, and the span can reach 3000-4000m. However, huge anchorages need to be built at both ends, which is not suitable for construction under complex environmental conditions such as deep oceans; self-anchored suspension bridges do not need to build huge anchorages. , but the span can’t be very large, it can only be about 1000m, otherwise the main cable anchorage area and the pressure stability of the main girder will be difficult to deal with, and the economy will not be good; cable-stayed bridges do not need to build huge anchorages, but Its span cannot be as large as the ground-anchored suspension bridge, and it can only be about 1500m, otherwise it is uneconomical and unreasonable

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