Based on collected data, the verticality of a pile is calculated by comparing the position of its center point at two different depths.
Calculating Pile Verticality
According to collected data, the verticality of the pile is calculated as the relative offset of the circles' centroids at two defined depths divided by the vertical distance. This method provides a measure of how much the pile deviates from a perfectly vertical line over a specific segment.
Key Components of the Calculation
To calculate verticality using this method, you need to identify and measure three main components:
- The Relative Offset of the Circles' Centroids: This refers to the horizontal distance between the calculated center points (centroids) of the pile's cross-section at two different measurement depths. Imagine drawing a circle representing the pile's cross-section at a certain depth and finding its exact center. Then, do the same for a different depth. The "relative offset" is how far apart these two center points are horizontally.
- Two Defined Depths: The calculation requires measurements taken at two distinct points along the vertical axis of the pile or borehole.
- The Vertical Distance: This is the actual measured distance vertically between the two defined depths where the centroid offsets were determined.
The Calculation Formula
The verticality is determined by dividing the measured horizontal offset by the vertical distance between the measurement points:
Verticality = (Relative Offset of Centroids) / (Vertical Distance Between Depths)This ratio is often expressed as a percentage or a deviation per unit of length (e.g., mm/m).
Practical Considerations
When collecting data for this calculation, a practical tip is that it is preferred to lower the device as close to the center of the pile as possible. This helps in obtaining more accurate measurements of the cross-section and its centroid at various depths.
By measuring the deviation of the center points at different depths and relating it to the vertical distance covered, engineers can assess the straightness and vertical alignment of the pile.
