Bored piles are important elements in deep foundation engineering due to their significant advantages in construction. One of the primary benefits is their enhanced load-bearing capacity, making them suitable for supporting heavy structures and resisting substantial vertical and horizontal loads. The versatility of bored piles in construction projects is enhanced by their ability to adapt to various soil conditions, whether cohesive or granular. Compared to other piling methods, the drilling process creates less noise and vibration, resulting in minimal environmental impact. Bored piles are a preferred choice in construction due to their stability, durability, and overall efficiency.
Bored piles are commonly used as a foundation solution when the conditions of the ground are considered fair to good, i.e. there is; no threat of shallow water table, soils are cohesive or rock and spoil removal is not a problematic or costly trait (such as contaminated/asbestos or acid sulphates). Bored Piles drilled into rock conditions, enhance the chances of minimising any foundation settlement. Australian Piling experts own various types of track-mounted drilling rigs and excavators which are capable and available to drill depths up to 30m into high-strength rock Bored Piles are drilled with circular augers, cleaned then filled with concrete and steel reinforced cages. The Soil / Rock is removed using certain designed drilling tools, such as soil augers, rock augers, core barrels and clean-out buckets, which can reach a depth of up to 30m and range in diameter from 200mm OD to 1200mm OD.
We have several methods available to support the walls/sides of the pile during its construction. This is assessed and selected in accordance with the ground condition being drilled into i.e. soft soils, stiff clays or rock layers, the level of the groundwater found and the environmental constraints on site. In the case where a drilled hole requires intervention to remain open (before the soil/sand collapses the hole), we use a steel liner/casing which can be permanent or temporary. Bored Piles are an effective solution to piling where various load cases are applied to the pile such as; uplift, tension, lateral load, moment, or large pile loads required.