Abstract

The Yangsigang Yangtze River Bridge is a mega suspension bridge with a main span of 1700 m. It is double-decked with 12 lanes of motorway serving urban transportation. The bridge was opened to traffic in October 2019 and it has become a significant project case with high reference value, because of its pioneering characteristics such as being a double-decked structure with large span, having large diameter high-strength steel wires adopted for the main cables, having an all-welded structure adopted for large girder segments, being designed with innovative methods, etc. This paper introduces the innovations of the project from the perspectives of design and construction, as well as describe the advanced design concepts and practical technologies used for this truss girder suspension bridge. The aerodynamic stability, fire safety, fatigue performance and appearance innovations of this bridge are also introduced for engineering reference.

摘要

杨思港长江大桥是一座主跨1700米的特大型悬索桥。它是双层的，有 12 车道的高速公路服务于城市交通。该桥于2019年10月建成通车，因其具有双层大跨度结构、采用大直径高强钢丝等开创性特点，成为具有高参考价值的重大工程案例。主缆、大梁段采用全焊接结构、采用创新方法设计等。本文从设计和施工的角度介绍了该项目的创新之处，介绍了先进的设计理念和实用技术。用于此桁架梁悬索桥。气动稳定性、防火安全、