What is the primary benefit of using compacted layers in excavation and grading?

Compacted layers in excavation and grading play a crucial role in enhancing structural stability. When soil is compacted, the particles are pressed closely together, reducing void spaces and increasing the overall density of the material. This increased density leads to improved load-bearing capacity, which is essential for the stability of any structures built on top of the compacted soil. Proper compaction minimizes settlement and shifting, which can occur when loose soil is used and is fundamental to ensuring that underlying layers support the intended loads effectively.

While cost reduction, erosion prevention, and water drainage are also important aspects of construction practices, they are secondary in relation to the primary goal of achieving structural stability. Compacting layers directly addresses the foundational integrity that supports buildings, roads, and other infrastructural developments, making it a critical consideration in any excavation and grading project.