Study on characteristics and formation mechanism of Dongjialiang landslide in Hualou Town, Wanyuan City, Sichuan Province
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Abstract:
Dongjialiang landslide in Hualou Town of Wanyuan City is a typical red bed landslide in Sichuan Basin. Several means such as field annotation and engineering geological exploration were used to reveal that this landslide was a slide deformation and failure mainly caused by powerful water pressure. Based on the spatial shape and residue characteristics after the sliding, the landslide was divided into the promoter zone (Zone A), pushing slide zone at the west side of the landslide (Zone B), and traction slide zone at the east side (Zone C). The study showed that the landslide started from the central zone (Zone A) where groundwater activity was intense. The water pressure rose sharply as the rainfall increased. Pushed by the water pressure, the rock at this zone was exposed to shear failure along the surface and sideslip surface, forming a wedge sliding while pulling the rocks at Zones B and C to produce pushing, tension, and traction sliding failure.
Keywords:
Dongjialiang landslide in Hualou Town ; red bed landslide ; formation mechanism
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