水位骤降条件下密集逆止式排水孔对防渗边坡抗滑稳定的影响研究

A Stability Study of Seepage Prevention Slope with Dense Check Valve Drainage Holes Under Sudden Drops of Water Level

渗流问题是影响边坡稳定的关键因素之一,在地下水位变动区挖方修建调节池尤其如此。为更全面分析调节池渗流场分布特征及渗控措施对边坡抗滑稳定的影响,以某调节池边坡的设计优化过程为例,采用二维有限元建模技术,将排水孔压力水头定义为时间的函数,模拟了水位骤降条件下调节池边坡的渗流场分布,计算了边坡抗滑稳定安全系数,对比了有无排水孔时的渗流场分布,分析了渗控措施的效果。研究结果表明,设置逆止式排水孔是水位骤降条件下提高防渗边坡抗滑稳定性的有效措施。

Seepage is one of the key factor affecting the slope stability, especially digging adjustable basin at fluctuation belt of groundwater. In order to analyze the effect of seepage and seepage measure on the slope stability against sliding, we take the optimi- zation process of one adjustable basin slope as an example, use the method of two-dimension finite element analysis, define the water pressure of drainage holes as time function, simulate the seepage under sudden drop of water levels, find the safety factor of stability against sliding, comparing seepage. The results revel that, setting check valve drainage holes is an e~[ective measure to enhance the stability of seepage prevention slopes under sudden drops of water level.