基于层次分析与灰色模糊理论的桥梁施工风险评估

重庆东水门长江大桥施工过程复杂, 存在诸多风险, 影响桥梁安全。为提高施工安全性, 本文运用层次分析法获取东水门桥上部结构施工时各个风险因素的权重值, 结合灰色模糊理论进行分级评估, 较好地发挥了层次分析法、模糊数学及灰色理论的优点。该桥上部结构风险等级的评估结果为3类, 与实际较为一致; 因此, 对于东水门桥这样的大跨径桥梁, 可采用层次分析和灰色模糊理论相结合的方法进行评估, 其评估结果准确性较高, 为桥梁安全施工提供了保证。

Bridge Construction Risk Assessment Based on Analytic Hierarchy Process and Grey Fuzzy Theory

The construction of East Gate Yangtze River bridge in Chongqing is complex.There are many risks to affect the safety of the bridge construction.A method is presented to improve the safety of construction.As for the method, Analytic Hierarchy Process (AHP) was used to obtains the weighted value of risk factors of construction of superstructure of the East Gate Yangtze River bridge and the grade assessment was made by using the grey fuzzy theory.The evaluation result of the superstructure risk level of the bridge is third-class and this is consistent with the actual result.Therefore, for long-span bridges, such as the East Water raft, AHP and grey fuzzy theory can be applied synthetically, and the evaluation result is accurate, which guaranteed the safety of the bridge construction.