跨河桥梁防洪影响评价研究

为保障河道行洪安全和桥梁安全运行,跨河桥梁作为河道管理范围内的建设项目必须进行防洪影响评价.结合桥孔过流的实际特点,对跨河桥梁防洪影响评价的评价内容、评价指标、防洪评价计算方法进行了系统的分析,建立了跨河桥梁防洪影响评价的评价体系.在此基础上以实际工程为例,通过防洪评价计算从桥梁布设、桥底高程分析、河势影响分析等方面对工程做出了防洪影响综合评价.结果表明:该评价体系科学、实用,可为其他跨河桥梁的防洪影响评价提供参考.

Assessment of flood control impact for crossing bridge

In order to ensure the safety of river channel flood and the bridges safe running, crossing bridge as the river management within the scope of construction projects must conduct flood impact assessment. Combining with the characteristics of bridge opening flow, the assessment contents,evaluation index and evaluation calculation method were systematically analyzed, so the assessment system of flood control impact assessment for crossing bridge was built. On this basis, taking practical engineering as an example, the paper made flood control comprehensive evaluation from the arrangement of bridge, bottom elevation analysis and analysis of influence on the river regime by calculation of flood control. The results showed that the assessment system is scientific and practical, it can provide reference for flood control impact assessment of other crossing bridge.