不同降雨强度下渣土受纳场边坡地下水渗流和稳定性的数值模拟分析

Numerical Simulation of Groundwater Seepage and Stability of the Construction Sediment Receiving Filed Slope under Different Rainfall Intensities

城市建设活动中产生的以弃土、弃料为主的建筑渣土的大量堆积容易形成稳定性极差的渣土边坡,而降雨条件的影响使得渣土边坡更不稳定,可能产生极大的潜在危害。选取某渣土受纳场边坡为研究对象,利用GEOSTUDIO数值模拟软件中的SLOPE/W和SEEP/W分析模块,通过设计5种不同降雨强度工况,对不同降雨强度条件下渣土边坡地下水渗流和稳定性进行了数值模拟计算与分析。结果表明:渣土边坡坡体内的地下水主要从下部渗透率较大的强风化岩层中流出;随着降雨强度的增大,坡体内相应位置处的总水头和孔隙水压力逐渐升高,并且地下水水位线也逐渐升高,而渣土边坡的稳定性逐渐降低。

In the urban construction activities,a large amount of construction waste which is mainly made up of abandoned soil and abandoned material is easy to form a sediment slope with poor stability.In addition,the rainfall has a negative influence on the stability of sediment soil slope,which may cause great potential harm. with GEO STUDIO software,this paper analyzes a characteristic slope of construction sediment receiving field to study the groundwater seepage and stability characteristics under rainfall conditions.The paper designs five different intensities of rainfall cases and obtains the seepage contour and stability results of construction sediment slope.The numerical simulation results show that the groundwater flows out from the weathered rock strata.As the rainfall intensity increases,the total head and pore water pressure in the same position of slope increases gradually,and the groundwater level in the slope also rises,however,the stability coefficient of sediment soil slope decreases gradually.