This shows a sample calculation which can be done by simple hand calculations for calculating forces in pile. This is valid only for single column symmetric pile arrangement.

1. Example for calculation of forces in pile for a single column
symmetric pile arrangement
Vertical Load =
2000 kN
250kN
75kN
500kNm
150kNm
4m
2.5m

2. • Calculation
Vertical load = vertical reaction + soil
load +SW of pile cap
Vertical reaction = 2000kN
Soil load = 5m x 3.5m x 2m x 18kN/m3
= 630kN
SW = 5m x 3.5m x 1m x 25kN/m3
= 437.5kN
Vertical load = 2000+630+437.5
=3067.5kN
𝑃 𝑚𝑎𝑥,𝑚𝑖𝑛 =
3067.5
6
±
500
4𝑚 𝑥 2
±
150
2.5𝑚 𝑥 3
Pmax,min = 594kN or 429kN
𝑀𝑎𝑥 𝑆ℎ𝑒𝑎𝑟 𝑖𝑛 𝑃𝑖𝑙𝑒 =
752 + 2502
6
Smax = 43.5kN
Vertical Load =
2000 kN
250kN
75kN
500kNm
150kNm
4m
2.5m