Behavior of diaphragm walls in clays and reliablity analysis.
Date of Issue2009
School of Civil and Environmental Engineering
Centre for Infrastructure Systems
With rapid economic development, the number of braced excavation projects has grown in Singapore and other coastal cities. The technology of diaphragm wall is widely used in these areas where soil deposits comprise of thick soft clay layers overlying stiff clay. However, the traditional empirical methods for predicting wall deflection, ground movement, and strut forces for these excavations are mostly based on excavations with flexible walls. This project studies the excavation behavior using the Finite element method. Uncertainties in the process of design and construction of excavations have been considered through reliability analysis. This project aims to study the behavior of excavations with diaphragm wall in soft clay and to develop a procedure to estimate the reliability index associated with wall and ground movement for excavation system. The following are the major aspects of this project.