The pile foundation project of Shanghai Oriental Hospital Qingdao Branch (Oriental Hospital of Tongji University) is made up of a large amount of workload with a tight construction period. With presence of backfill soil and silt in overburden, ground conditions are very complicated. Depending on the particular conditions, auger boring, percussive drilling and the rotary drilling were used together with some technical measures such as extended conductors, borehole wall sealing mud, etc. to eliminate borehole contraction and caving. As a result, the project was completed with high quality and full quantity and on schedule, achieving good economic and social benefits.