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The Suoertou landslide, a giant landslide with a volume of 72.85 × 106 m3 in Zhouqu County, Gansu province of China, has been reactivated with a rate ranging from 300 to 600 mm/year since 1990s. The slow-moving dynamic nature indicates that the creep nature of its slip zone may play one of the predominant roles in the reactivation of the landslide. To clarify this, creep behavior of the saturated soil collected from the landslide’s slip zone was investigated via a series of direct shear creep tests. It was found that the creep behavior of the landslide’s slip soil was strongly dependent on the stress-level for both normal and shear stresses. It was also found that the accelerated creep stage could not be reached until the shear stress exceeded 125, 187.5 and 300 kPa and the initial strain rate at 3.141, 3.688 and 4.5 min−1, under the normal stresses of 100, 200 and 400 kPa, respectively. Moreover, both the critical shear stresses and the initial stain rates at which the accelerated creep stage begins seem to have a linear correlation with the normal stress.
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- Creep Behavior of the Slip Zone of a Giant Slow-Moving Landslide in Northwest China: The Suoertou Landslide as an Example
Systemische Notwendigkeit zur Weiterentwicklung von Hybridnetzen