浅析防洪评价中冲刷深度的计算与探讨

Analysis on Scour Depth Calculation for Flood Control Evaluation

随着我国临河工程逐年增加,防洪安全的重要性日趋显现,而洪水对桥梁造成破坏的主要原因就是冲刷。合理的冲刷深度计算是桥梁设计的重要依据,也是整座桥梁可以安全运营的重要保障。研究出适用于桥墩冲刷深度计算的方法,对提高桥梁设计的安全性、可靠性有着重要的现实意义。笔者通过综合分析历史水文资料,总结了河床冲刷的危害,并通过阜锦线义县城区段改建工程特大桥现有资料及相关规划的分析,合理地计算出该桥梁的冲刷深度,为防洪影响评价工作提供重要保障。

The importance of flood control has become more and more obvious with the increasing riverside projects. Since scour is a major reason for bridge damage, a reasonable scour depth is not only an important basis for bridge design but also an important guarantee for the safe operation of the whole bridge. Therefore, finding an appropriate method for depth calculation is of great practical significance to improve the safety and reliability of bridge design. The hazards of scour are summarized in the paper through a comprehensive analysis of the historical hydrological data; besides, the scour depth of a bridge in Yixian County is calculated based on the existing data and the related planning, which provides an important guarantee for the flood control evaluation.