ABSTRACT
The project comprised of a deep excavation of 16 meters for a three-basement com-mercial structure, set within a challenging weathered rock profile and constrained by limited set-backs. Initially, a 14-meter-deep secant pile wall supported by rock anchors and struts was imple-mented. However, intense rainfall led to groundwater flooding, resulting in system failure, infrastructure damage, and suspension of construction activities. Manufactured sand was used for temporary reclamation to support recovery efforts and facilitate reconstruction activities. The sup-port system was revised with reinforced concrete piles, extra struts, and a waler-strut setup to counter the high groundwater table. This case study covers the critical engineering judgments and safety measures essential for deep excavations under similarly challenging conditions.
