As witnessed from your figure beneath, continual auger is used to drill the borehole, lift up drilled soil, and pour concrete whilst the auger is moved up. Subsequently, the borehole isn't going to want casing or hydrostatic strain to stop damage to the borehole wall. Log in to TheConstructor to https://zanderybywt.activoblog.com/34636240/5-tips-about-cast-in-situ-piles-you-can-use-today