Abstract:Based on the research results of domestic and foreign technology and engineering examples, this paper summarizes the current situation and development trend of circular post-tensioned prestressed concrete technology, and briefly introduces the double-layer double-ring post-tensioned unbonded prestressed concrete lining project in the sand drainage tunnel of Xiaolangdi Project of Yellow River.

Abstract:The application of double-ring post-tensioned unbonded prestressed concrete lining is the first in the world. This paper introduces the selection of prestressed lining type of Xiaolangdi sand drainage tunnel, and expounds the structural characteristics and construction of the lining.

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Abstract:This paper introduces the structure analysis of three prestressed oval-shaped digester with a capacity of 10536m3, the configuration of prestressed steel wire bundles, the design, construction and the forming of prestressed concrete in Jinan sewage Treatment Plant.

Abstract:This paper introduces the general construction situation, the optimal design of traction system, the construction steps and the construction experience of the T structure of Guiyang Duraiying Bridge with a rotating weight of 7100t

Abstract:Huangbai River Bridge and Xialaoxi Bridge of Three Gorges are steel tube concrete structures with main span of 160m. This paper introduces the characteristics and principle of the rotating construction of the Bridges.

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Abstract:For the 200m to 1000m long-span bridge, the designer can choose from different schemes: beams, frames, arches, stay cables and suspension cables, however, for the super-span bridge that exceeds 1000m, prestressing technology is required. At this time, the alternatives are the cable and the suspension cable. If the span limit reached by the cable is exceeded, the suspension bridge solution is the only choice. The double cable concept in this paper provides a new option for Bridges with main span of 3000m or longer, and briefly describes some aspects in the design of super span Bridges, such as elastic stability, wind resistance and seismic performance.

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