DESIGN AND ANALYSIS OF LATERAL WALL DEFLECTION IN DEEP EXCAVATION ON SOFT CLAY: A CASE STUDY OF THE OPAL SKYVIEW BUILDING, HO CHI MINH CITY
DOI:
https://doi.org/10.11113/aej.v15.23143Keywords:
Excavation, Retaining wall, ardening soil model, Mohr coulomb model, Soft clay soilAbstract
This study investigates the basement excavation of the Opal Skyview building in Thu Duc, Ho Chi Minh City, using 3D Plaxis numerical simulations for reverse analysis. The research aims to evaluate excavation behavior, particularly diaphragm wall displacement, by comparing numerical predictions with field monitoring data. The Hardening Soil (HS) and Mohr-Coulomb (MC) models were employed to simulate wall deflections at six monitoring locations (SID1–SID6) across various excavation stages. The results indicate that numerical simulations overestimated displacement at specific points, such as SID2 and SID6, by 1.3 and 1.1 times, respectively. The HS model demonstrated superior accuracy, closely aligning with observed data, whereas the MC model exhibited greater deviations. The findings highlight the critical role of accurate geotechnical investigations, appropriate design methodologies, and real-time monitoring in ensuring excavation safety and structural stability. Furthermore, the study underscores the necessity of integrating numerical simulations with field observations to enhance excavation efficiency and mitigate construction risks. By providing insights into excavation-induced deformations, this research contributes to more reliable and cost-effective deep excavation practices. The results serve as a valuable reference for engineers working on deep excavations in urban environments with complex geotechnical conditions.
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