What is the purpose of drainage tiles in subsurface drainage?

The answer is focused on the function of drainage tiles, which are used in subsurface drainage systems primarily to manage and redirect excess water away from foundations to prevent water accumulation and potential damage. By directing water to a storm sewer system or sump pit, drainage tiles help mitigate problems associated with water saturation in the soil surrounding a building, such as flooding, erosion, and structural instability.

The design of drainage tiles typically involves perforated pipes laid in trenches filled with gravel, allowing groundwater to enter and flow away from critical areas. This system effectively manages surface and subsurface water, promoting better drainage and reducing pressure on foundation walls. Ensuring that excess water is directed appropriately contributes significantly to the longevity and safety of the structures above the drainage system.