Pile-base resistance formation in natural-scale field conditions

Abstract

Field testing is the most relevant method for verifying pile foundation design calculations. The ultimate static load test allows the pile load to reach the maximum bearing capacity; however, the excessive cost of this method restricts its use. The theory presented in this paper is based on static load test results performed in a specifically designed chamber that closely resembles natural soil conditions and pile dimensions. This study utilizes the Meyer-Kowalow theory and previous author’s work on this topic to attain a streamlined design process and reduce costs without compromising safety and reliability. It was concluded that the relationship between the toe and skin of the pile remained constant, and this was depicted in graphs showing the results under field conditions. The author intends to verify this conclusion in future research, using more static load test results. The primary focus of this study was to develop a method for estimating pile-toe bearing capacities, which represents the most complex measurement method to solve. The previous author’s works focused on developing the calculus required to estimate the pile-skin bearing capacity, which was the first step in describing the pile-soil interaction. This study focused on verifying a mathematical model describing pile-toe behavior and calculations based on this model. This study provides practical equations for estimating pile-toe and skin resistance, which can improve the design process when using the proposed method.