Dynamic Design Method for Friction Pile with Prestressed Cable

A concept of dynamic design method for friction pile with prestressed cable is put forward. First, the internal forces of the pile and cable are calculated according to the pile s working conditions. Then, the greatest internal forces obtained are taken as criteria to design the pile s structure and the cable s bearing capacity. A discussion on how to determine the prestressed force value is also made. The results of a computing example show that the dynamic design method can reflect the most dangerous state of a pile, thus the friction pile and cable can retain reasonable safety margins, favorable for the cable and pile to work for a long time.