洪水位变化对河岸崩塌影响机理的

结合洪水期堤岸渗透与崩塌的特点，重点研究了崩滩与渗透险情的关系及水位升降等对崩岸的影响。研究结果表明，对于粘土岸滩，洪水迅速上涨期间，水压力对河岸的稳定是有利的，而洪水骤降时，河岸崩塌的几率增大；对于非粘土岸滩，洪水缓慢上涨期间，河岸稳定性变化不大，而洪水缓慢下降后，岸滩稳定系数减小。

Study on River Bank Collapse Due to Flood Water Level Fluctuation

This paper studies the relationship between the river bank collapse and the seepage failure of the embankment foundation, and the influence of water level fluctuation on the river bank collapse through integrating the characteristics of the river bank seepage and collapse during flooding seasons. The results show that for the clay-soil bank, water pressure in the rising process of water level is beneficial to the bank stability, while the possibility of the river bank collapse will increase in the flood water rapidly falling process; and for the non-clay soil reaches, the river bank stability doesn't change very much during the water level slowly rising process, while the stability coefficient decreases during the flood water slowly falling process.