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The DF650 bridge-launching machine for the Xindafang-Shantou Railway project has successfully completed its first bridge erection.
Xindafang News: In June, the blazing sun burns as red as fire, and good news arrives from the Shantou–Shanwei Railway. Amid this fiery June, the DF650 bridge-launching machine at the Huilai Girder Yard of the Xindafang–Shantou–Shanwei Railway project has successfully completed its first bridge erection.
The Shantou–Shanwei Railway is in Guangdong. This project is a key provincial initiative and an important component of the national “Eight Vertical and Eight Horizontal” coastal high-speed rail network, with a design speed of 350 km/h. It also serves as a vital link between eastern Guangdong and the Guangdong–Hong Kong–Macao Greater Bay Area. Upon completion and opening to traffic, it will fill the gap in the coastal corridor—more than 1,000 kilometers long—where no high-speed rail line operates at 350 km/h.
DF650 The bridge-launching machine was designed and manufactured by Xindafang specifically to meet the construction requirements of single-track prestressed concrete box girders on China’s passenger-dedicated railway lines. This machine is capable of erecting entire-box-girder spans for single-track high-speed railways currently in operation in China. During girder-lifting operations, the DF650 bridge-launching machine works in tandem with a 550-ton tire-type girder transporter to jointly undertake the transportation and erection of post-tensioned prestressed concrete simply supported box girders along the Shantou–Shanwei Railway section from DK71+644.47 to DK109+080.
DF650 The girder-launching machine consists primarily of a main frame, front support legs, rear support legs, front auxiliary support legs, a dual-luffing hoisting system, a single-luffing hoisting system, ancillary structures, a hydraulic system, and an electrical system. Its rated lifting capacity is 325 t + 325 t, enabling it to erect box girders with spans of 35 m, 30 m, 25 m, 32.7 m, 24.7 m, and 20.7 m, as well as variable-span full-box girders.
Main Technical Features of the Equipment
During girder erection, a two-leg structural load-bearing system combined with single-span erection technology is employed, ensuring clear load distribution and streamlined operational procedures. The lower section of the front leg is laterally translatable and equipped with a rotating pivot pin, while the rear leg’s traveling mechanism is connected to the lower transverse beam via a pivot pin, thereby accommodating the requirements of small-curve bridge erection. Both the traveling and lifting mechanisms utilize variable-frequency drive technology for smooth start-up and braking. The entire machine is controlled by PLC programming, ensuring high safety and reliability. The hydraulic system adopts an independent-unit design, which simplifies and modularizes the system, reduces line losses and power consumption, and facilitates maintenance and transportation.
The location of the first single-track box girder erected this time is 11 kilometers from the girder yard. Both ends of the first box girder are cast-in-place girders: the forward end is a single-to-double-track cast-in-place girder, while the rear end is a three-to-four-track cast-in-place girder.
Keywords:
First, system, railway, single-track, DF650, adopts, technology, erection, bridge-launching machine
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