Use stabilizing piles for landslide control is a common measure. The space between piles is a very important parameter. Engineers must find a balance between landslide control ability and cost. In China
at the present time in engineering practice and based on empirical formula
the pile space equals to 2-5 times the width of pile itself. Some theoretical studies on the interaction force relation between pile and soil have been reported and several calculation models were proposed to calculate optimal pile space. A calculation formula is built through dimensional analysis which analyzes the factors that influence the pile space. The new model offers a way for pile space calculation.