In the paper, according to its success application in a tall building, the design and construction of under-reamed bored pile is debated in details.

• 本文结合钻孔扩底灌注桩在某工程中的应用情况,对钻孔扩底灌注桩设计、施工等应用方面进行了比较详细的介绍,指出该工法具有较好的经济效益。