There were various obstacles distributed in the miscellaneous fill in the site of Beijing Spring Garden project, such as old pipes, old foundation concrete, concrete blocks, the soil nails and steel strands of old foundation pit support, and there were also some pipelines near the piles need to be protected, the construction was very difficult. According to the engineering conditions，artificial hole-digging, drilling with long spiral drilling machine and post-insert reinforced cage were adopted in this project. The practice shows that these technologies can not only effectively deal with the shallow underground obstacles and protect the underground pipelines, but also has many advantages of simple and safe construction, high quality reliability and short construction period. The environment problems of slurry pollution and slurry treatment are completely solved with obvious social and economic efficiency. The paper introduced these technologies about the construction process and operation points.