基于孔隙水压力消散的排土场边坡动态稳定性研究

Study on dynamic stability of dump slope based on the dissipation of pore pressure

为克服现有黄土基底排土场稳定性计算方法的局限性及控制技术针对性不强或量化困难的问题,通过基底黄土孔隙水压力消散试验,得到了孔隙水压力及消散度与消散时间之间影响规律;基于极限平衡法和孔隙水压力消散规律,提出了黄土基底排土场动态稳定系数计算方法;基于该算法,对原有静态的黄土基底排土场稳定控制措施进行优化,提出了"分段排土,控制强度,分区推进,调整程序,监测监控,增大容量"动态稳定控制措施。该成果已于同类型排土场中得到良好的应用与推广。

In order to overcome the limitations of the stability calculation method and the problem that the stability control technology of loess basement dump is not sufficient enough or difficult to quantify,through the pore pressure dissipation test,the influence law between the pore pressure,the dissipation rate and the dissipation time is obtained.Moreover,a method based on the limit equilibrium method and dissipation law of pore pressure is proposed to calculate the dynamic stability coefficient of loess basement dump. Based on the algorithm proposed,the original static stability control measures of loess basement dump are optimized,and the dynamic stability control measures including＂segmented dump,control strength,region marching,adjustment procedure,monitoring and control,increase dump capacity＂are proposed.The results have been applied and popularized in the same type of dump field.