The pile spacing of each pile is taken as three times the diameter of the pile.

Explanation:
- The pile spacing refers to the distance between the centers of adjacent piles in a pile foundation.
- It is important to determine the appropriate spacing between piles to ensure the stability and load-bearing capacity of the foundation.
- The spacing is typically determined based on the diameter of the piles.
- According to industry standards and design guidelines, the pile spacing is usually taken as a multiple of the pile diameter.
- In this case, the pile spacing is taken as three times the diameter of the pile.
- This means that the distance between the centers of adjacent piles will be three times the diameter of a single pile.
- Taking the pile spacing as a multiple of the pile diameter helps to ensure that there is sufficient space between the piles to accommodate the load and prevent any interaction or interference between adjacent piles.
- It also helps to distribute the load evenly across the foundation, reducing the risk of differential settlement.
- By taking the pile spacing as three times the diameter of the pile, there is enough space for construction, maintenance, and future repairs if needed.
- This spacing provides a balance between minimizing the number of piles required for the foundation while maintaining adequate stability and load-bearing capacity.
- It is important to note that the specific pile spacing may vary depending on the design requirements, soil conditions, and other factors considered in the foundation design process.
- Therefore, it is essential to consult the relevant design codes, standards, and guidelines to determine the appropriate pile spacing for a given project.