Deep excavation at the millenia MRT station

Abstract

This dissertation studied the behavior and performance of the diaphragm wall used in the construction of Millenia MRT station, and assessed the current practice of design and analysis. The lateral wall movement and surface ground settlements are the primary concern in the design of suitable earth retention system for deep excavations using top down construction method. Back-analyses were conducted using the program PLAXIS, which incorporates both the finite element method and the hyperbolic stress-strain model to simulate the soil behavior. The calculated wall deflections and ground settlement were compared with field measurement. The comparisons indicated close agreement with the field data.