Finite element analysis on wall deformation and ground settlement behavior induced by excavation in Makassar.

As a developing city, Makassar is undergoing rapid construction, including excavation. Wall deformation and ground settlement caused by excavation are critical aspects to be considered and controlled not to affect the adjacent structures. This paper presents a finite element analysis on an after-event prediction of wall deformation and ground settlement induced by excavation in Makassar using the Mohr-Coulomb (MC) model. A 4 m excavation retained by 0.8 m thick and 14 m length of secant bored pile wall is selected to explore the excavation behavior. It was found that an empirical equation of maximum ground surface settlement (δvm) to maximum wall deformation (δhm) is δvm=0.5δhm that could be used as a reference in a further excavation design in Makassar. This study proposed the relation of undrained shear strength (Su) and Young's modulus of Makassar clay to N value equal to 6N and 1500N, respectively. A set of parametric studies have been carried out by considering the effect of excavation depth, excavation width, and wall penetration depth with various soil Young's modulus values observed to understand the behavior of wall deformation and ground settlement due to excavation in Makassar. [ABSTRACT FROM AUTHOR]