Foundation drilling is a construction technique used to create deep holes in the ground for building foundations. This process involves using specialized drilling equipment to penetrate soil and rock layers, ensuring a stable base for structures like buildings and bridges. The depth and diameter of the holes depend on the specific requirements of the project. Once the holes are drilled, they are often filled with concrete or reinforced with steel to form piles or caissons. These elements provide support and distribute the weight of the structure above, helping to prevent settling or shifting over time. Proper foundation drilling is crucial for the safety and longevity of any construction project.