The DF900T guided beam fixed-point bridge erector, jointly developed by China Railway Fourth Bureau and Zhengzhou Dafang Large Machinery Equipment Manufacturing Co., Ltd., has completed its assembly, heavy load testing, and special equipment certification on the Hehe (Wuhan) Railway. This milestone marks the successful completion of the first 800-ton double-track full-hole box girder test frame for the Hewu Railway. The machine represents a significant advancement in railway construction technology, combining innovation with practical efficiency.
According to an official from the Hefei Railway Bridge Team at China Railway Fourth Bureau, the DF900T is equipped with independent intellectual property rights, featuring a maximum span of 32 meters and a rated lifting capacity of 900 tons. It integrates the best features of existing guide beam erectors while introducing new technologies such as infrared positioning and electronic monitoring systems. The high-positioned guide beam design helps address challenges with the first and last cross-beams, while the through-frame beam is supported by simple supports. This allows the machine to function both as a load-bearing device for box girders and as a support system during bridge operations, offering dual functionality that enhances overall efficiency and structural stability.
The entire system uses frequency conversion speed control, reducing operational shocks and ensuring smooth and safe beam installation. Advanced sensor-based image capture systems are also integrated, allowing real-time monitoring of the beam-laying process for greater precision and safety.
In addition, the supporting equipment for the DF900T includes a tire-type hydraulic automatic lifting flat transport vehicle, which is part of the national 863 Plan project. This vehicle is the first large-tonnage railway box girder transportation system developed and manufactured in China, marking a major breakthrough in domestic railway infrastructure technology. Its introduction significantly improves the efficiency and safety of transporting heavy girders, further enhancing the capabilities of the DF900T erector. Together, these innovations represent a leap forward in China's railway construction industry, setting new standards for efficiency, safety, and technological integration.
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