中原地区黄河上客运专线铁路桥梁混凝土结构耐久性设计对策与措施

Tactics and Measures for Durability Design of Concrete Structures of Passenger Dedicated Railway Bridges over Huanghe River in Central Plains Region

通过对国内外混凝土结构耐久性的现状概述,说明混凝土结构耐久性设计的必要性。根据建桥环境条件分析结果并结合耐久性设计有关规定中环境类别及侵蚀作用等级划分标准,判断该区域桥梁各部分的环境侵蚀作用等级;然后按所设计桥梁侵蚀作用等级、结构设计使用年限及工程的实际情况,制定了中原地区黄河上客运专线铁路桥梁耐久性设计的相关内容。

The necessity of durability design of concrete structures is accounted for on the basis of summarization of the current status of durability of the concrete structures at home and abroad. In accordance with the analysis results of environmental conditions for bridge construction and also with reference to the criteria for grading environment kinds and erosion effect in the relevant provisions of durability design, the grades of the environmental erosion effect on various parts of the bridges to be built in the Central Plains region are identified and the relevant contents for durability design of the passenger dedicated railway bridges to be built over the Huanghe River in the region are formulated in conformity to the grades of the erosion effect, designed structure service years and the actual conditions of construction of the bridges.