Single-tower self-anchored suspension bridge

Abstract

The invention discloses a self-anchored suspension bridge with single-tower, comprising a cable tower and main cable, main beam and suspender. The middle part of main cable is supported by the top of cable tower and two ends of main cable are fixed on the main beam. The main beam is hung under the main cable by the suspender. The main beam is mixed beam and the main suspending part is steel stiffing beam. Side-suspending part and anchor-suspending part at two sides of main suspending part are concrete stiffening beams. The steel stiffening beam and the concrete stiffening beam are connected by steel-concrete joint part. Concrete stiffening beam at the steel-concrete joint part is covered by bearing steel plate and the bearing steel plated is fixed with the steel stiffening beam at the steel-concrete joint part. The invention is provided with simple structure, larger suspending ability, considerable economic benefit and durability. When it is built there is no influence to navigation.

Description

technical field [0001] The invention belongs to the field of bridge engineering, in particular to a single-tower self-anchored suspension bridge. Background technique [0002] At present, bridges within the span range of 200-600m mostly use cable-stayed bridge structures and arch structures. With the advancement of technology, self-anchored suspension bridges have appeared in this field as a supplement. If a cable-stayed bridge structure is used, the cost is high because the cable-stayed bridge needs a large span for balance; if an arch structure bridge is used, it can be divided into two types: thrust and non-thrust. If a thrust-free arch is used, It is also necessary to use larger side spans for balance. If a thrust arch is used, a huge foundation must be built, which is costly and unfavorable for environmental protection. In contrast, the self-anchored suspension bridge has both the advantages of the above two structures and avoids the shortcomings of the two structures....

AI Technical Summary

Problems solved by technology

The use of two cable towers is beneficial to reduce the stress level of the main girder and improve the stability of the overall structure, but there are two problems in the twin towers: (1) the improvement of construction efficiency and the shipping requirements during the construction period cannot be taken into account

If the construction efficiency is to be improved and the construction period shortened, the cable tower and the main beam must be constructed at the same time as much as possible, but the main beam must be erected with a full hall bracket during simultaneous construction, and the full hall bracket will affect shipping

(2) The scale of the self-anchored suspension bridge is small, and the vertical load of the cable tower is relatively small. Two cable towers are used, and the economy is not high

[0003] At the same time, the current self-anchored suspension bridge stiffening beams are divided into steel beams and concrete beams. Concrete beams are cheap, but low in strength and self-heavy. As the span increases and the scale of the beam increases, the overall cost rises rapidly.

Steel beams have high strength and light weight, but are expensive

If all steel beams are used in the self-anchored suspension bridge, the overall cost will be high, and if all concrete beams are used, the spanning capacity of the self-anchored suspension bridge will be affected

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