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Soil nailing is a form of "top-down" construction in cohesive soils where the excavation is made in lifts and pneumatic concrete is applied to the newly exposed face. Rods, called soil nails, are then drilled into the face and grouted. Successive lifts are completed to the bottom of the excavation, resulting in a soil nailed mass which behaves like a large gravity structure resisting overturning and sliding.
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