Coefficient of Increase of Limit Skin Friction
A specific input parameter is the coefficient of increase of limit skin friction k due to the applied technology of construction. By default, the value of this coefficient is set equal to 1.0. There is no recommendation by the standard for its specific value - its adjustment depends solely on the practical experiences of the designer. It has been found from the in situ measurements on real piles that the value of k is usually greater than 1.0 and may reach a value of 1.5. Theoretically, however, it may attain values even less than 1.0.