水流作用下临水岸坡稳定性计算模型

河流崩岸是我国堤防安全面临的重大问题,汛期前后崩岸诱发大量的滑体进入河道,影响航运,给沿岸人民正常生产生活带来重大影响。针对水流作用下临水岸坡失稳问题,综合考虑坡表静水压力、内部孔隙水压力、边坡几何形状等因素的影响,构建了楔形岸坡稳定计算模型,并结合长江干流芙蓉大堤段崩岸实例,分析了各因素对岸坡稳定的作用。结果表明,坡表与地下水位升降及二者之差,对岸坡稳定影响较大,且水流的淘刷深度也直接影响着岸坡整体稳定。

Model for the Stability Calculation of Waterside Slope under Water Flow

River bank collapse is a major problem faced by China's embankment safety,especially before and after flood seasons;river bank collapse induces a large number of landslides into the river channel,destroying the embankment,silting up the river channel,affecting shipping.In view of the bank slope instability under the water flow,this paper comprehensively considers the influence of slope surface water level,groundwater infiltration,water rush,pore water pressure,hydrostatic pressure and so on.On the basis of basic hypothesis,the stability calculation model of wedge-shaped bank slope under the synergistic effect of multiple factors is constructed,and the use of poles is used.The limit equilibrium method is used to derive the calculation formula of the stability safety factor of the bank slope under different working conditions,and then the influence of each factor on the stability safety factor of the shore slope is analyzed based on bank collapse of Furong dike,Yangzi river,Pengze County.The results show that it has a great influence on the stability of bank slope for the rise-fall and the difference between surface water level and groundwater level,and the scouring depth also directly affects the stability of bank slope.