Design, Fabrication and Erecting of the Long Span Transmission Tower for Crossing the Amazon River of 500kV TLTUCURUi-XINGU-JURUPARI-ORIXIMINa: Part I: Structure Analyses, Selection and Design

摘要

The project of 500kV TLTUCURUi-XINGU-JURUPARI-ORIXIMINa was a large and important transmission line in Brazil, and the most difficult jobs were the design and construction of the 295m-high tower, the 3rd highest tower in the world, and its transmission-line crossing the Amazon River, the world's longest river, which was successfully finished in 2012. This paper introduces the analyses and design of the long span transmission tower, including the loads calculation, the structure selection and the design of members and joints. Based on the structural analyses and comparisons on economical efficiency, the steel-pipe lattice truss tower was selected for this project, and the flange joint was chosen to connect the main steel-pipes, and the tubular joint and the gusset plate joint were chosen as the main two types of connection for the diagonal and horizontal members with the main member. Besides, the wind-induced vibration and nonlinear properties of structure must be considered for this type of high tower. Besides, the key techniques about fabrications and constructions of two suspension towers on the river and the top of mountain, were introduced in detail. As a result, the theory and method adopted in the analyses and design of this project could be referred for the high transmission tower with similar structure.