Cable-stayed bridge provided with curved single pylon with double cable planes

Abstract

The invention discloses a cable-stayed bridge provided with curved single pylon with double cable planes. The bridge comprises a main pylon, a main beam, stay cables and a cushion cap, wherein the cable facing plane and the cable backing plane of the main pylon are cambered surfaces with variable curvature and unchangeable width, longitudinal slant angles are different and change section by section along with construction of the main pylon, the longitudinal slant angle in the middle section of the main pylon is at least 50 degrees, and the longitudinal slant angles at the bottom and the top of the pylon are about 90 degrees; two side surfaces of the main pylon are planes, the widths of the two sides surface of the main pylon gradually get smaller from bottom to top, and accordingly, the cross sections of the main pylon gradually linearly get smaller from the bottom to the top of the pylon in the height direction; the main pylon is a solid section with four chamfered sides, the lengths of chamfers of the main pylon are gradually linearly changed from 150 cm to 50 cm from the bottom to the top of the pylon in height direction, and the widths of the chamfers are all 30 cm; the main beam and the main pylon are integrated through concrete pouring; ten pairs of stay cables are arranged between the main pylon and the main beam. The cable-stayed bridge is reasonable in structure, attractive in appearance and strong in stress sense and gives people a unique visual feeling.

Description

technical field [0001] The invention relates to a cable-stayed bridge, in particular to a cable-stayed bridge with a curved single tower and double cable planes. Background technique [0002] Conventional cable-stayed bridges have cable-stayed cables on both sides of the bridge tower. Under the action of dead load, the horizontal force of the cable-stay cables on both sides of the main tower can maintain balance. The main tower can only bear a certain level under the action of live load and additional load. force and bending moment. Unlike conventional cable-stayed bridges, the pylons of cable-stayed bridges without back cables have only one side cable, and the force on the pylons is shown as a cantilever beam under the force of the cable-stayed cables and its own gravity. In order to ensure that the main tower is in a good stress state, the tower body of the cable-stayed bridge without back cables is generally designed to be inclined, relying on the self-weight moment of t...

AI Technical Summary

Problems solved by technology

Concrete bridge pylons have a large dead weight, and temporary steel structure support needs to be erected during the construction period; steel pylons are easy to process and assemble, and at the same time speed up the construction progress, but the cost is high; hybrid structure pylons need to connect steel pylons and concrete pylons , the joint is usually located in the middle and lower part of the bridge tower, and the force and structure are relatively complicated, which increases the difficulty of design and construction

Images