What is the primary purpose of using subsoil drains in construction?

The primary purpose of using subsoil drains in construction is to manage groundwater effectively. Groundwater can significantly affect the stability and integrity of construction projects. When water accumulates in the soil, it can lead to issues such as soil saturation, which may weaken the ground, leading to potential structural failures or settlement problems. By installing subsoil drains, excess groundwater is redirected away from the construction area, helping maintain optimal soil moisture levels that contribute to the stability of the foundation and surrounding structures. This drainage system is critical in ensuring that the construction site stays dry, thereby preventing water-related complications during and after the construction process.

Other options like improving aesthetics, preventing erosion, or enhancing soil density serve different functions and are not the primary goals of subsoil drains. While managing groundwater can indirectly help mitigate erosion by keeping soil stable and dry, the direct intention of using subsoil drainage systems is primarily focused on groundwater management.