Bored Piles are reinforced concrete shafts cast in site in a drilled hole. They are the most versatile types of deep foundation due to their adaptability to many kinds of ground conditions whether in land or under sea or river as shown in the pictures. Bored piles range from 600mm to 6000mm in diameter with depth that can reach down to 100 meters. Bored piles are installed by first removing the soil by a drilling process and then constructing the pile by placing concrete in the hole. The simplest form of construction consists of drilling an unlined or unprotected hole and filling it with concrete. Complications that may arise such as difficult ground conditions and the presence of ground water have led to the development of special drilling technologies.