【摘要】 大多数滑坡的发生与地下水活动有关,地下水的动态变化直接关系到滑坡的稳定性状况。由于边坡介质的非均匀性,以及滑坡过程中边坡的变形破坏具有非连续性,故在滑坡发生的过程中地下水位的变化和地下水渗流方式的变化是一个复杂的过程。含碎石的滑坡体在长期地质作用过程中形成了地下水管网状排泄系统,这种排泄系统对限制地下水位上升和保持边坡的稳定性具有重要的作用。从上三公路6#滑坡研究结果中可以看到,滑坡体中地下水渗流具有很大的不均匀性,大多呈管状集中渗流,当边坡发生变形和破坏时,地下水管网状排泄系统将因坡体的不连续变形而发生破坏,从而导致地下水位的快速上升,甚至溢出地表,使边坡稳定性迅速下降,滑坡的变形破坏加速发展。地下排水洞能有效地控制地下水水位的上升,特别是能有效防止前期降水在坡体中的积累效应,是滑坡治理中值得推广的工程措施。更多还原

【Abstract】 Most landslides are induced by groundwater activity;and the stability of landslide is directly related to the dynamical variation of groundwater.Due to the slope medium heterogeneity and the slope deformation discontinuity,it is a complex process for the groundwater table variation and the change of seepage system when landslides happen.The groundwater pipe seepage system is often developed in pebbly clay slopes in the long-term geological processes.It is important to prevent groundwater table rising and to keep the slope stability.According to the study on the landslide No.6 along Shangyu—Sanmen Highway,it is found that the groundwater seepage is inhomogeneous;and it flows tubularly generally.When the slope deforms and failure happens,the pipe seepage system will be damaged due to the discontinuity deformation of the slope,which causes the groundwater table to rise fast,even to overflow the ground surface.Therefore,the slope stability decreases and the failure of the slope speeds up.The underground drainage tunnel can stop the groundwater table rising effectively;especially,it can prevent the accumulation of the prior period precipitation in slope.So it is an effective engineering measure for landslide control and is worth to be applied.更多还原