黄土滑坡体立体排水系统的三向渗流数值模拟

设置由排水隧洞及水平、垂直和倾斜方向的排水孔组成的立体排水系统，是降低黄土滑坡体地下水位线，提高滑坡体稳定性的有效方法，但其效果的计算分析是一难点。三向渗流数值模拟是解决这一个难点问题的有效方法。对渭河关中段西部一典型黄土滑坡体立体排水系统的三向渗流数值模拟表明，由于滑坡体内部土层结构的复杂性，室内试验得到的渗透系数不能很好地反映地层综合渗透性，需要根据实测地下水位进行反分析；排水孔的间距与位置对降水效果有极大的影响。

3D Seepage Numerical Analysis of Three-dimensional Drainage System in Loess Landsliding Body

Setting three-dimensional drainage system which is composed drainage culvert and horizontal, vertical and acclivitous drainage bore in loess landsliding body, is an effectual method for dropping the underground water level and improving the stability of slope, but its effection estimation is a problem. The 3D seepage numerical analyze is an effectual method to solve the difficulty. The three-dimensional drainage system in a typical loess landsliding body at Guanzhong section of Weihe River is simulated with 3D seepage numerical analyze method. The results show that because of complexity of stratum in landsliding body, the infiltrative coefficients obtained with indoor testing do not accord with naturalness, the anti-analyze is needed according to the determined underground water level on the spot; the space and position between drainage bore hugely influence the effect of dropping the underground water level.