黄河大堤边坡稳定的强度折减法分析

Analysis on Yellow River dike slope stability with strength reduction method

采用有限元强度折减法对黄河大堤边坡稳定问题进行了计算和分析,分别计算了临河堤坡未迎水和河床水位达到堤顶两种工况下的堤坡稳定安全系数,结果表明,第一种工况下安全系数Fs=1.963>1,堤坡安全稳定,第二种工况下安全系数Fs=1.395>1,安全系数有所减小,但堤坡仍然是安全的,由此可知黄河大堤的边坡是安全可靠的。

The article calculates and analyzes Yellow River dike slope stability with finite element strength reduction method, and respectively calculates the dike slope stability security coefficients under two conditions of riverside upstream and riverside levee. Results show that ： under the first condition, the security coefficient Fs = 1. 963 〉 1, which shows that the dike slope is safe and stable, under the second condition, the securi- ty coefficient Fs = 1. 395 〉 1, the security coefficient reduces a little, while the dike slope is still safe. Thus, the Yellow River dike slope is safe and reliable.