What percentage of maximum density is mandated by standards for compacting fill areas in a substation yard?

The requirement for compacting fill areas in a substation yard is typically set at a percentage of maximum density to ensure stability and structural integrity. A compaction level of 95% of maximum density is standard in many engineering and construction guidelines for such applications. This level of compaction provides a solid foundation that minimizes settlement over time and enhances the performance of structures and equipment within the substation.

Achieving 95% compaction ensures that the fill material is densely packed, reducing the potential for voids that could lead to settling or shifting under the weight of heavy electrical equipment and other structures. This is critical in a substation environment where stability and reliability are paramount.

Other percentages, such as 45% or 65%, would not provide the necessary stability and could lead to issues with erosion, uneven settling, or even failure of the infrastructure. A compaction level of 100% could imply over-compaction, which might lead to other issues such as soil degradation or lack of necessary drainage. Therefore, the 95% standard provides a balanced approach that meets the requirements for safety and durability in substation construction.