长江科学院院报2017，Vol.34Issue(8)：30-35,6.DOI:10.11988/ckyyb.20160500
基于坡面冲刷的荆江典型岸坡稳定性分析
Stability Analysis of Typical Bank Slope Based on Slope Erosion in Jingjiang River
陶桂兰 1谭彬政 2束梁3
作者信息
- 1. 河海大学港口海岸与近海工程学院,南京210098
- 2. 中交第四航务工程勘察设计院有限公司,广州510230
- 3. 长江南京航道工程局,南京210011
- 折叠
摘要
Abstract
According to the features of typical dual soil structure in the Jingjiang River,the calculation formula of transverse erosion was employed to study the influences of flow velocity and sediment concentration on transverse erosion rate of bank slope,as well as the variation law of morphologic changes of bank slope under fluctuation of water level.On the basis of saturated-unsaturated seepage theory,a two-dimensional unsteady seepage model was established by using SEEP/w program and the change process of seepage field of bank slope was simulated.Furthermore,on the basis of calculation of pore-water pressure field,the change law of slope stability in consideration of bank erosion or not was analyzed by using Morgenstern's method.Results show that when bank erosion is not considered,slope stability increases with the raise of water level and declines with the drawdown of water level;but when bank erosion is considered,slope stability decreases both with the raise and the drawdown of water level,and the falling rate of safety factors is obviously larger than that without considering bank erosion.In conclusion,the flood period and the final stage of water level falling are two dangerous periods of slope stability,which should be monitored specially.关键词
岸坡稳定/坡面冲刷/水位升降/饱和-非饱和渗流/二元土结构Key words
bank slope stability/slope erosion/water level fluctuation/saturated-unsaturated seepage/dual soil structure分类
天文与地球科学引用本文复制引用
陶桂兰,谭彬政,束梁..基于坡面冲刷的荆江典型岸坡稳定性分析[J].长江科学院院报,2017,34(8):30-35,6.
