In what manner should backfill beside pipes be placed?

The correct approach to placing backfill beside pipes involves using horizontal layers not exceeding 4 inches in thickness. This method promotes proper compaction and stability, crucial for preventing future settling or shifting of the pipe. By placing the backfill in thin layers, each layer can be compacted effectively, which reduces voids and ensures that the surrounding soil supports the pipe uniformly.

Compacting the backfill in horizontal layers helps to limit the amount of disturbance to the pipe, minimizing the risk of damage and ensuring a secure fit. This technique also facilitates better drainage and reduces the likelihood of water pooling against the pipe, which could lead to erosion or structural failure over time. Thus, employing this method is critical for maintaining the integrity of the installed infrastructure.