LAND INSTABILITIES________________________________
Mechanism of destruction:-
Landslides destroy structures roads pipes and cable either by4he ground moving out form beneath them or by burying them Gradual ground movement causes tilted, unusable buildings. Cracks in the ground split foundations and rupture buried utilities. Sudden slope failures can take the ground out from under settlements and throw them down hillsides. Rock falls cause destruction from fragmentation of exposed rock faces into boulders that roll down and collide into structures and settlements. Debris flows in softer soils, slurry material, man-made spoil heaps and soils with high water content flow like a liquid, filling valleys, burying settlements, blocking rivers (possibly causing floods) and blocking roads. Liquefaction of soils on flat land under strong vibrations in earthquakes is the sudden loss of the strength of soils to support structures that stand on it. Soils effectively turn temporarily to......
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