Performance of a new driven battered micropiles system in sand

Abstract

A new concrete-free driven micropile footing system that consists of a steel pile cap and a number of inclined small diameter steel micropiles has been tested. This new footing system is light enough to be manually handled and can be installed in a short time-frame using small jackhammers. There is minimal soil disturbance and no need for any excavation making it a smart solution for supporting light structures. This paper presents the performance of this new footing system in a medium dense sand formation under vertical compressive and tensile pull-out forces. Two different combinations (with different embedment depths) were tested. Ultimate bearing and pullout capacities were determined us..