What is the main purpose of drainage in earthworks?

The primary purpose of drainage in earthworks is to effectively manage water movement and prevent erosion. When soil becomes saturated with water, it can lead to various issues such as instability, increased soil erosion, and potential damage to structures that rely on stable ground. Proper drainage systems help channel excess water away from construction areas, thereby maintaining the integrity of the soil and reducing the risk of erosion. This is particularly crucial in earthwork operations where soil conditions significantly impact the performance of the land and any structures built upon it.

In contrast, while compacting soil layers contributes to overall stability, it does not directly address the management of water. Enhancing the aesthetic value and supporting structural foundations are important, but they are secondary to the critical function that drainage serves in protecting the ground and preventing water-related problems during and after construction.