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Longcheng Bridge, Guangxi

Longcheng Bridge, Guangxi

The project is located in Longsheng Each Nationality Autonomous County, Guilin City, Guangxi Zhuang Autonomous Region. It adopts a steel-concrete composite beam structure and is built to span the GuiSan Expressway and Heping River. The project uses steel plates with a thickness of 30mm~70mm, and the welding seams have high requirements. Due to the large span of the composite beam, the installation accuracy of each segment is high during installation. The measurement work is strict and meticulous, controlling measurement errors, closely monitoring each process, optimizing the welding sequence and method of on-site circumferential welds, and preparing contingency plans for weld inspection and rework of the entire welding project to ensure that the finished composite beam meets the design and specification requirements.

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Kunming Mingbo Interchange Bridge across the Chengkun Railway steel box girder project

Kunming Mingbo Interchange Bridge across the Chengkun Railway steel box girder project

The A and D ramps of Mingbo Overpass cross the Chengkun Railway with a span of 50 meters. Both spans of steel box girders adopt a single-box four-cell structure, with a deck width of 10.9 meters. Due to the high safety requirements of railway operation, only a bridge crane can be used, and the construction must be completed within the time specified by the railway department. Each ramp is constructed in four box cells separately.

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Steel bridge project of Jiaozi Peak Wind Farm in Panxian County, Guizhou Province

Steel bridge project of Jiaozi Peak Wind Farm in Panxian County, Guizhou Province

The project's bridge superstructure adopts a welded steel truss girder and rectangular hollow steel diagonal bracing design. The bridge is 32.0 meters long and 6.5 meters wide, with a structure including lower flanges, 8 webs, a top flange, and transverse stiffeners, forming a stable overall structure. The bridge has the capacity to bear a 130-ton heavy-duty trailer, spanning a valley, demonstrating its strong crossing ability. During the lifting process, due to geographical limitations, lifting operations could only be performed on one side. Therefore, the engineering team carefully planned and used a 300-ton truck crane in coordination with a 240-ton truck crane to ensure the smooth progress of the lifting work.

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