Multi-tower high-low tower rigid frame system cable-stayed bridge structure

Abstract

The invention provides a multi-tower high-low tower rigid frame system cable-stayed bridge structure which comprises a main beam, bridge piers, bridge towers and a plurality of stay cables with the two ends anchored to the bridge towers and the main beam respectively. The bridge piers comprise low piers arranged on the two sides in the bridge direction and fixedly connected with the main beam andhigh piers arranged in the middle in the bridge direction and fixedly connected with the main beam; each bridge tower comprises a side tower and a middle tower, the bottom of the side tower is fixedlyconnected with the main beam at the position corresponding to the low pier, the bottom of the middle tower is fixedly connected with the main beam at the position corresponding to the high pier, andthe tower height above the bridge surface of the middle tower is larger than that above the bridge surface of the side tower. The cable-stayed bridge structure adopts a bridge design scheme of combining the high-low towers and the high-low piers, the defect of large terrain height difference is overcome through combination of the high piers and the low piers, the terrain defect is changed into thebridge construction advantage, the bridge side span length is reduced, the bridge length and the number of the high piers are reduced, and the engineering cost is reduced; and after combination of staggered arrangement of the higher towers and low towers, the structure is more attractive.

Description

technical field [0001] The invention belongs to the technical field of railway bridge engineering, and in particular relates to a cable-stayed bridge structure with multiple towers, high and low towers, and a rigid frame system. Background technique [0002] Traditional railway cable-stayed bridges are mostly symmetrical and contoured towers, such as figure 1 and figure 2 As shown, its structural system can be divided into pier-beam separation and pier-beam consolidation, but this traditional bridge structure is mostly used in areas with small bridge spans and link lengths and relatively flat terrain; and for the pier-beam separation system, it is necessary to Setting large-tonnage bearings is expensive and extremely difficult to construct in high-pier bridges in mountainous areas; the pier-beam consolidation system avoids the setting and replacement of large-tonnage bearings, but the applicable span area is extremely limited. [0003] However, when the height difference ...

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Problems solved by technology

[0002] Traditional railway cable-stayed bridges are mostly symmetrical and contoured towers, such as figure 1 and figure 2 As shown, its structural system can be divided into pier-beam separation and pier-beam consolidation, but this traditional bridge structure is mostly used in areas with small bridge spans and link lengths and relatively flat terrain; and for the pier-beam separation system, it is necessary to Setting large-tonnage bearings is expensive and extremely difficult to construct in high-pier bridges in mountainous areas; the pier-beam consolidation system avoids the setting and replacement of large-tonnage bearings, but the applicable span area is extremely limited

[0003] However, when the height difference between the two sides of the bridge site is large or the V-shaped canyon is large, especially when the height difference exceeds 100 meters, the traditional cable-stayed bridge form needs to be increased at this time, and the number of high piers needs to be increased, resulting in waste of investment and Construction risks increase accordingly

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