跨海铁路50 m箱梁设计与建造关键技术

Key Technologies of Design and Construction of 50-m Box Beam for Cross-sea Railway

摘要:

头门港支线二期铁路设计时速80 km/h，深海区采用50 m简支箱梁作为设计跨径。现阶段50 m 跨度简支箱梁尚未在客货共线铁路中应用，为此进行设计研究。首先介绍项目的工程特点和建设条件；其次对结构的上下部进行研究，进行静力计算分析和海中顶板吊点实体计算分析，确保结构安全性和海中顶板吊施工可行性；再次海中风大浪高，建设条件复杂，对海中50 m简支箱梁施工方案进行探讨。通过跨海铁路50 m跨度简支箱梁设计，对类似客货共线铁路项目提供参考。

Abstract:

The design speed of the Toumen Port Branch Phase II Railway Project is 80 km/h. The 50-m simple-supported box beams are adopted as the design span in the deep sea area. At present, 50 m-span simple-supported box beams have not been applied in passenger-cargo joint railways. Therefore, the design research is carried out. First, the engineering characteristics and construction conditions of the project are introduced, and then the superstructure and substructure are studied, and the static calculation analysis and solid calculation analysis of roof suspension points in the sea are conducted to ensure the structural safety and the construction feasibility of the sea roof hanging. Secondly, due to the complex construction conditions of strong winds and high waves in the sea, the construction scheme of 50-m simple-supported box beams in the sea are discussed. The design of 50 m-span simple-supported box beams for cross-sea railways provides a reference for similar railway projects that share passenger and freight lines.