Cable-stayed arch bridge

Abstract

The invention relates to a cable-stayed arch bridge. The bridge comprises an arch bridge body, comprising arch ribs and arch feet at the two ends of the arch ribs, two bridge towers, arranged at the two ends of the arch rib respectively, the bridge towers being arranged on the arch feet at the same end, and the bridge towers inclining outwards in the longitudinal bridge direction; a tensioning part, comprising upper inhaul cable sections arranged above the two ends of the arch rib respectively and lower cable penetrating sections arranged below the arch rib, one ends of the two upper inhaul cable sections being connected to the bridge towers at the same end respectively, and the other ends of the two upper inhaul cable sections being connected with the two ends of the lower cable penetrating sections respectively; and a support part, the two ends of the supporting part being connected with the lower cable penetrating section and the arch rib correspondingly, and the supporting part being used for supporting the arch rib. The bridge tower generates inclined downward pressure on the foundation in the extending direction of the bridge tower, and the horizontal component force of the pressure can balance the outward horizontal thrust generated by the arch ribs on the arch feet. The bridge towers at the two ends incline outwards to tighten the tensioning parts, the tensioning partsprovide supporting force for the arch ribs through the supporting parts, and the supporting force can reinforce the bridge and improve the bearing capacity of the bridge.

Description

technical field [0001] The invention relates to the field of bridge design, in particular to a cable-stayed arch bridge. Background technique [0002] Ordinary overhanging arch bridges include arch ribs and foundations at the arch feet at both ends, which are specifically thrust structures, that is, the arch ribs generate thrust on the arch feet at both ends, and the thrust is mainly borne by the arch feet and the foundation at the arch feet. However, due to the limitation of the service conditions, the upward-supporting arch bridge generally cannot be equipped with tie rods, so it is impossible to balance or reduce the thrust at the arch foot by tensioning, which requires the foundation itself to have high strength and support. Increase the scale and volume of the foundation at the arch foot; in addition, with the increase of the span of the arch bridge and the decrease of the rise-span ratio, the stiffness of the arch rib is getting smaller and smaller, the stress tends to...

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a cable-stayed arch bridge for the problems that the arch foot of the traditional upward-supported arch bridge bears a large thrust, is easily deformed, and has a low bearing capacity.

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