Fenghuo montain is 5 010 meters high and located in the multi year frozen soil area.The nature condition is harsh and geology condition is very complicated.It is difficult to construct,especially for the pile foundation.Traditional pile foundation construction technique can't meet the requirement of code and specification.This paper introduce the pile foundation construction of Feng Huo Shan's culvert,including the choosing of the drilling machine,the drilling process,the proper critical angular velocity an...