To increase the bearing capacity of piles, the protruding technique proves to be both reliable and effective. The spiral protruding pile is a variation of this kind that can be applied to dry soil conditions. A practical formula is proposed for designing spiral protruding multi-disk cast-in-place piles. Also illustrated here is the project in which spiral protruding piles were applied with great success in terms of techniques and costs, while its unique advantages under certain conditions can be viewed. The paper aims to provide solid basis for research, design and further application of this type of pile.