Study on Load Capacity of Anchor Piles for Oil Workover Derrick

the workover rig is always fixed by anchor piles in land oilfields. Good load capacity of anchor pile is the key factor to the guarantee of safe workover operation. The load capacity test of anchor pile is complete by connecting vibration test and method of mechanical impedance. The reduction coefficient must be used in calculating the anti-pulling load capacity because of difference of soil kinds. To testify the results from mechanical impedance method, the system of pulling pile directly is built. The average error of data from this system is within 5%. It can conclude that the method of mechanical impedance and vibration test can be popularized widely to load capacity of anchor pile, especially in different kinds of soil. The research can enrich the theories of uniform section pile and give the theoretical foundation to fix the anchor piles safely during workover rig operations.