桥墩冲刷对岸坡稳定的影响及防护工程设计

Influence of bridge pier scour on bank slope stability and design of protection works

在河道中建造桥墩,会引起桥墩附近水流状态发生很大变化,致使河床产生一般冲刷和局部冲刷,进而影响桥墩附近岸坡的稳定,并有可能对河势的稳定产生不利影响。分析了在安徽省长江河道上建设桥梁后岸坡冲刷及对其稳定的影响。指出桥梁设计单位应重视桥墩冲刷影响岸坡稳定的问题,并应采取适当的防护措施。比较了几种岸坡防护工程型式后,提出了针对桥墩冲刷影响岸坡稳定进行防护工程设计的要点。

The bridge piers built in the river will disturb the nearby flow and cause the general scouring and local scouring to the river bed, which will affect the stability of the bank and the river regime. We analyzed the bank slope scouring phenomenon of Yangtze River in Anhui Province caused by the bridge construction and its influence on the bank slope stability. It is pointed out that the bridge design corporations should pay attention to the bank slope stability problems resulted from the bridge pier scou-ring and take appropriate protective measures. We compared several types of bank slope protection works and put forward the main points in the design of bank slope protection works.