The Longquan Dingfeng Yicheng pile foundation project was featured of large pile diameter and high ultimate bearing capacity of the single pile where the maximum pile diameter was 2400mm, and the vertical ultimate bearing capacity of the single pile was 89600kN. There is little reference experience in the construction field. The pile foundation project mainly faced three challenges: easy caving in the sand layer and pebble layer, difficulty in bedrock penetration, and difficulty in clearing sediment. In reference to the pile foundation construction experience of bridges and railways in China, the key technologies such as stabilization of the sand layer and pebble layer, step reaming, bailing out hole bottom sediments, were purposely targeted to solve the construction problems. Testing after the waiting period showed that most of the bored piles were Class I piles. The summary of the construction experience of this project can provide reference for the application of large diameter rotary bored piles in the construction field.