库区下游桥梁基础冲刷与防护

The Bridge Foundations Scouring and Protection in the Lower Reach of a Reservoir

本文就水库下游桥梁基础的冲刷防护问题,以大量的水文调查和观测资料分析,总结库区下游河床纵向和平面变形的规律,以及对桥梁基础的冲刷危害,采用平面和立面相结合的防护加固措施,进行设计和施工。经两年使用后,对其进行实测比较和验算,证明该防护加固符合桥基冲刷的水力学机理,技术安全可靠,而且经济合理。

In this paper,as a demonstration of the protection of the bridge foundation in the lower reach of a reservoir,the deformation law of the river bed profile and cross-section in the lower reach of a reservoir is examined and its damage to the bridge foundation is investigated based on a lot of hydrologic data.The protection works of the bridge foundation designed and constructed in a combination of planar and vertical system were shown to be reliable and comformed with the hydraulic behaviour two years later according to field measureints and calculation.