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Influential narrower definitions restrict landslides to slumps and translational slides in rock and regolith, not involving fluidisation. This excludes falls, topples, lateral spreads, and mass flows from the definition. [1] [2] The causes of landslides are usually related to instabilities in slopes.
The term landslide refers to a variety of mass wasting events (geologic slope failures) that include slumps, slides, falls, and flows.The two major types of slides are rotational slides and translational slides. [3]
A landslide in which the sliding surface is located within the soil mantle or weathered bedrock (typically to a depth from few decimeters to some meters) is called a shallow landslide. Debris slides and debris flows are usually shallow. Shallow landslides can often happen in areas that have slopes with high permeable soils on top of low ...
Sudden slumps usually occur after earthquakes or heavy continuing rains, and can stabilize within a few hours. Most slumps develop over comparatively longer periods, taking months or years to reach stability. An example of a slow-moving slump is the Swift Creek Landslide, a deep-seated rotational slump located on Sumas Mountain, Washington.
Translational or rotational movement is considered on an assumed or known potential slip surface below the soil or rock mass. [13] In rock slope engineering, methods may be highly significant to simple block failure along distinct discontinuities. [10]
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This type of measure is used in cases of smaller landslides. The effectiveness of micropiles is linked to the insertion of micropiles over the entire landslide area. In the case of rotational landslides in soft clay, the piles contribute to increasing the resisting moment by friction on the upper part of the pile shaft found in the landslide.
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