### Strutt Help

Prediction of Vibration from Vibratory Piling (TRL)
^{1/1, 1/3}
A first approximation of vibration which may arise from vibrodriving may be obtained from the expression:

`\nu_(res)=k_v/x^\delta`

where:
- `k_v=60`, with a 50% probability of the vibration level being exceeded
- `k_v=126`, with a 33% probability of the vibration level being exceeded
- `k_v=266`, with a 5% probability of the vibration level being exceeded
- `x` is the distance measured along the ground surface from the pile (m)
- `\delta=1.2` (start up and run down); `1.4` (steady-state) or `1.3` (all operations)
- `\nu_(res)` is the resultant peak particle velocity (mm/s)

Source: Transport Research Laboratory Report 429 *Groundborne vibration caused by mechanised construction works* (2000), Equation 20

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