Interpretation of Static Load Tests on the Burj Khalifa’s Foundation Piles

Abstract

For assessing the geotechnical capacity of reinforced concrete bored piles, instrumented static compression load tests are often utilized in high-rise building projects. To better understand the geotechnical characteristics, this article discusses the axial behavior of preliminary compression test piles installed at the Burj Khalifa Foundation in Dubai. These tests were carried out for 1500mm and 900mm diameter piles prior to foundation construction, up to an ultimate test load of 60260kN. Vibrating wire concrete embedment strain gauges, comprising four units at six levels, were installed on the preliminary test piles. Results indicate that the skin friction was increased after the pile test as compared to the values used for the preliminary pile design. Subsequently, four working load tests were also performed during the construction of the foundation to confirm the final pile design. This article explores the results of static pile load test interpretation, an important factor in enabling reasonable construction settlement prediction, including the pile interaction effects.