Meteorological Risk Assessment in Large-scale Bridge Construction Based on Multi-source Information and Downscaling Techniques

This is a study to improve the pertinence and accuracy of bridge-construction meteorological risk assessment. The multi-source information including meteorological observations, the disaster information, and the meteorological conditions of construction unit were used. Taken a large-scale bridge construction in northern Jiangsu of China as an example, the paper researched the dialectical relationship between the construction weather risk and meteorological disaster risk, put forward the main evaluation indicators and evaluation methods for meteorological risk that fused multi-source information, and then established the assessment process of meteorological risk for bridge construction based on multi-source data. The results show that the meteorological factors such as temperature, wind speed, visibility and others, are the main weather risk indicators in the construction of the bridge, and high-impact weather disaster risk such as strong wind, rain and snow, frozen are important parts of the bridge construction risk. Bridge construction meteorological risk assessment base on multi-source information could be divided into three aspects: meteorological background investigation, the project site meteorological observation and analysis, and numerical model simulate. The results implied that while the risk assessment conclusions based on the former two aspects could suitable for the project purpose, the meteorological risk assessment results based on multi-source information and statistical downscaling techniques have greater reliability.