| This paper presents a first approximation of the elastic limit displacement of soil resistance to horizontally loaded piles. A total of 37 field test data sets were consistently retrieved from a vast database. Both mathematical and graphical approaches were adopted to interpret the elastic limit of soil resistance from the measured load-displacement curve. The data sets indicate that the mean value of the elastic limit displacement is 5-6% of the pile diameter, and its coefficient of variation is approximately 40-60%. A design horizontal threshold displacement can also be proposed as 2-4% of the pile diameter, considering the variation in elastic limit displacement. |