降雨入渗-重分布下考虑不同降雨雨型的斗龙港岸坡渗流稳定性分析  

Analysis of seepage stability of Doulong Port Bank Slope considering different rainfall patterns under rainfall infiltration redistribution

作　　者：朱明明 张林 ZHU Mingming;ZHANG Lin(Water Resources Bureau of Dafeng District,Yancheng 224000,China)

机构地区：[1]盐城市大丰区水利局,江苏盐城224000

出　　处：《江苏水利》2024年第6期44-49,共6页Jiangsu Water Resources

摘　　要：以江苏省盐城市斗龙港一典型岸坡为例,基于非饱和降雨入渗理论和极限平衡法,进行了降雨入渗-重分布下考虑了不同降雨雨型的岸坡渗流稳定性分析。结果表明,随着降雨入渗,岸坡各监测点饱和度和孔隙水压力逐渐增大,岸坡安全系数与降雨入渗时间呈负相关关系,降雨停止后,安全系数先下降后逐渐增大并趋于稳定状态,岸坡安全系数在雨水重分布阶段达到最小值;不同降雨雨型对岸坡孔隙水压力和安全系数影响显著,前锋型降雨下岸坡孔隙水压力增幅度最大,安全系数下降最迅猛,后锋型变幅最小,实际工程中应着重防范前锋型降雨。Taking a typical bank slope of Doulong Port in Yancheng City,Jiangsu Province as an example,based on the unsaturated rainfall infiltration theory and the limit equilibrium method,the seepage stability analysis of bank slope under rainfall infiltration and redistribution is carried out.The results show that the saturation and pore water pressure of each monitoring point on the bank slope increase gradually with the rainfall infiltration,and the safety factor of the bank slope presents a negative correlation with the rainfall infiltration time.After the rainfall stops,the safety factor first decreases and then gradually increases and tends to be stable.The safety factor of bank slope reaches the minimum value in the rainwater redistribution stage.The rainfall pattern has a significant effect on the pore water pressure and safety factor of bank slope.The pore water pressure increases the most and the safety factor decreases the most rapidly under the front rainfall,and the change amplitude of the back rainfall is the smallest.In practice,we should focus on preventing front rainfall.

关 键 词：降雨类型 渗流分析 岸坡稳定 数值模拟 

分 类 号：TV212[水利工程—水文学及水资源]