Bored piles are deep foundation elements used to support structures by transferring loads to deeper, more stable soil layers. They are created by drilling a hole into the ground and then filling it with concrete, often reinforced with steel. This method is particularly useful in areas with weak surface soil, as it allows for greater stability and load-bearing capacity. The construction of bored piles involves specialized equipment, such as drilling rigs, to ensure precision and safety. They are commonly used in large construction projects, including buildings, bridges, and retaining walls, where strong foundations are essential for structural integrity.