The Tao'er River Grand Bridge on G228 in Binzhou is a remarkable infrastructure project. It is a significant part of the transportation network and represents advanced engineering achievements.
Key Specifications of composite girder bridge
This bridge has an impressive length of 4,334 meters. Its main span reaches a remarkable 338 meters. The bridge is a hybrid - girder structure. The main bridge is designed as a 128 + 338+ 128 - meter hybrid - girder continuous rigid - frame bridge.
Construction Highlights of composite girder bridge
The construction process of this bridge was filled with technical challenges. For the closure of the bridge, the steel box girder of the closure section is 127 meters long, with a single - width of 12.5 meters and a weight of 1,200 tons. Given the lack of domestic experience in inland hoisting of such long steel box girders, and considering the complex surrounding environment of the bridge site and frequent strong winds, the construction team carried out meticulous planning in advance. They conducted numerous sand - table simulations of the construction process. They chose the time when the tidal current velocity was at its minimum and used a 10,000 - ton transport ship to move the steel box girder to the position right under the bridge - deck crane. The team also adjusted the ship's anchor chain to achieve precise positioning.
Moreover, they utilized a self - developed intelligent hanging and lifting integrated machine to control eight 350 - ton jacks for synchronous lifting at a speed of 6 meters per hour. The on - site staff monitored the operation in real - time through data such as the lifting speed and oil pressure of the jacks, ensuring that each lifting stroke was within an error range of plus or minus 5 percent, which guaranteed the accurate closure of the steel box girder.
Importance and Impact of composite girder bridge
Once completed, the bridge has had a far - reaching impact. It has significantly shortened the travel time from 90 minutes to 5 minutes for commuters crossing the Tao'er River. This has greatly enhanced the transportation efficiency of the region.
The G228 project in Binzhou, of which this bridge is a part, is a high - grade coastal highway that combines coastal defense and coastal development functions. The bridge's completion has improved the road - network layout in the northern coastal area of Binzhou. It provides a strong transportation guarantee for the development of the Bohai Rim and the Yellow River Basin regions and contributes to the high - quality development of the Yellow River Delta.
