燕矶长江大桥主缆架设完成，33万公里钢丝可绕地球8圈

Core Viewpoint - The Yanjie Yangtze River Bridge, the world's largest cable-stayed bridge with a main span of 1860 meters, has successfully completed the cable installation, marking a significant milestone in its construction [1][4]. Group 1: Bridge Specifications - The Yanjie Yangtze River Bridge spans approximately 26 kilometers, featuring an upper layer designed for highways with a speed limit of 100 km/h and a lower layer for urban expressways with a speed limit of 80 km/h [3]. - Each of the four main cables has a diameter of about 1.04 meters and a length of approximately 3000 meters, composed of 217 strands, each made of 127 high-strength steel wires with a diameter of 5.6 mm [8]. Group 2: Engineering Achievements - The total length of all steel wires in the four main cables is about 330,000 kilometers, which is enough to circle the Earth's equator eight times, weighing approximately 65,000 tons, equivalent to suspending nearly seven Eiffel Towers between the two towers [12]. - The bridge's internal cables have a tensile strength of 2100 MPa, while the external cables have a tensile strength of 1960 MPa. The maximum cable force for a single main cable during the bridge's construction phase is about 70,000 tons, with a total tensile force of 280,000 tons for all four main cables, capable of easily lifting six medium-sized aircraft carriers [12]. Group 3: Economic and Social Impact - The Yanjie Yangtze River Bridge is a crucial infrastructure project for the Ezhou International Logistics Hub, serving as a key crossing for the integrated air-land transportation system in the region. It supports the rapid development of the airport economic zone and the formation of an air urban area, enhancing the spatial structure of the Wuhan metropolitan area [16]. - Once completed, the travel time from Huanggang to Ezhou Huahu Airport will be reduced to just 15 minutes, significantly improving the convenience for residents on both sides of the river and playing an important role in promoting regional economic and social development [16].