ABSTRACT
The Singapore MRT North-East Line is a major infrastructure development that is currently under construction. When completed, it will provide commuters living in the new towns in the North-East a fast direct route to the south of the island. This paper summarises the results of the field measurements at HarbourFront Station obtained from an initial pilot test section, where the excavation first commenced. This observational approach was used to confirm the design assumptions used in the working design. A comprehensive site investigation was conducted including in-situ packer tests and pumping tests. The pilot test section was heavily instrumented and monitored. A numerical analysis using an FEM programme SEEP was carried out. The seepage prediction is compared with monitored data during the excavation. The predicted strut forces are also compared with the monitored data. The paper also demonstrates the use of this observational approach to modify the original design such as the omission and early removal of some struts, resulting in cost and time saving.
