世界最宽双边工字钢组合梁斜拉桥完成荷载试验

Core Points - The Yilai Expressway Chai Buxi Grand Bridge, the world's widest double-sided I-beam composite cable-stayed bridge, completed its load test on October 31, marking it as Hubei Province's first cable-stayed bridge built at the same level for both expressway and provincial road [1][2] - The bridge is a key control project in the Yichang section of the Yilai Expressway, which is part of Hubei's highway network planning [1] Summary by Sections Bridge Specifications - The main bridge spans 904 meters with a main span of 480 meters and a width of 44.5 meters, designed for "two-way four-lane expressway + two-way two-lane secondary road" standards [1] - The project is funded by Hubei Communications Investment Group and constructed by Yichang Construction Company, with China Communications Second Highway Engineering Bureau as the contractor [1] Load Testing - The load test serves as the "ultimate health check" before the bridge opens, simulating various driving conditions to assess structural safety and load-bearing capacity [1] - The static load test involved 19 test conditions with a heavy vehicle fleet of 35-ton three-axle trucks, achieving a maximum load of 1715 tons with 49 vehicles [1] - Over 190 strain measurement points, 50 displacement measurement points, and 40 cable force measurement points were set up to monitor key indicators in real-time [1] Dynamic Load Testing - The dynamic load test included 15 conditions, covering pulsating tests, unobstructed driving, obstructed driving, and braking tests to gather critical response data under dynamic loads [2] - All tests were conducted at night to minimize temperature fluctuations affecting accuracy, with technical staff working in shifts to ensure data reliability [2] Economic and Social Impact - The completion of the Yilai Expressway will enhance the highway network in the Wuling Mountain area of Hubei Province, significantly benefiting tourism, supporting the development of revolutionary old areas, and promoting economic cooperation and ethnic unity in the region [2]