Experimental research on landslides using nuclear magnetic resonance sounding

摘要

With the Three Gorges Reservoir in use to store water the level of groundwater will rise certainly as well. The flabbiness layers around landslides on the side of the reservoir will become softer when they meet water. During storing of reservoir, the change of water-level will bring the variation of dynamic water pressure, which leads to slides, especially when groundwater table reaches a sliding-surface. The nuclear magnetic resonance sounding (NMRS or MRS) was applied to investigate ground-water change in hope of providing more detail characteristics to the study on the stability of landslides. We selected Zhaoshuling landslide in The Three Gorges Reservoir to implement our experiment. Based on parameters, such as depth and thickness of aquifer, water content, the variation of permeability, the existing slide-boundary and their distribution could be determined after identifying by borehole data. By monitoring these parameters in different seasons at landslide body, the geologic model of landslide was set up under the agreement of MRS data.