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Ground Stability, Foundations and Substructures 121<br />

(a)<br />

(b)<br />

Photograph 3.7 (a) Piling rig with auger and kelly bar. (b) Bored cast-in-place pile with<br />

steel sleeve excavation support. (c) Core barrel with trap for excavating granular. (d) Core<br />

barrel with bullet cutting teeth for cutting through rock. (e) Auger for cohesive soils. (f)<br />

Reinforcement cage for pile.

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