首页|Insight into the Permeability and Microstructure Evolution Mechanism of the Sliding Zone Soil: A Case Study from the Huangtupo Landslide, Three Gorges Reservoir, China
Insight into the Permeability and Microstructure Evolution Mechanism of the Sliding Zone Soil: A Case Study from the Huangtupo Landslide, Three Gorges Reservoir, China
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
A large number of laboratory investigations related to the permeability have been con-ducted on the sliding zones. Yet little attention has been paid to the particular sliding zones of the slide-prone Badong Formation. Here, we experimentally investigate the permeability nature and the mecha-nism of seepage in the viscous sliding zone of the Huangtupo Landslide. Saturated seepage tests have been performed first with consideration of six dry densities and thirteen hydraulic gradients, in con-junction with the mercury intrusion porosimetry test and scanning electron microscopy test for the mi-crostructure analysis after seepage. The results show that seepage in the sliding zone soil does not fol-low Darcy's Law, since there is a threshold hydraulic gradient (i0) below which no flow is observed and a critical hydraulic gradient (icr) over which the hydraulic conductivity (K) tends to be stable. The per-centage of bound water could be responsible for the occurrence of i0 and icr. Furthermore, pore size dis-tributions (PSD) less than 0.6 µm and between 10 and 90 µm exhibit positive and negative correlations with the i0, respectively, indicating that the i0 is related to the PSD. The mechanism accounting for this result is that pore water pressure forces fine clay particles into the surrounding large pores and con-verts arranged particles to discretely distributed ones, thereby weakening the connectivity of pores. The seepages in the sliding zones behave differently from that in the sliding mass and sliding bed in re-sponse to the permeability.
reservoirlandslidessliding zone soilpermeabilitymicrostructureseepage
Qianyun Wang、Huiming Tang、Pengju An、Kun Fang、Junrong Zhang、Minghao Miao、Qingwen Tan、Lei Huang、Shengming Hu
展开 >
Badong National Observation and Research Station of Geohazards, China University of Geosciences, Wuhan 430074, China
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Institute of Rock Mechanics, Ningbo University, Ningbo 315211, China
National and Provincial Joint Engineering Laboratory for the Hydraulic Engineering Safety and Efficient Utilization of Water Resources of Poyang Lake Basin, Nanchang Institute of Technology, Nanchang 330099, China
展开 >
National Key Scientific Instrument and Equipment Development Project of ChinaMajor Program of National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China
NETL
NSTL
万方数据
