ABSTRACT
Thailand’s capital city, Bangkok has been planning to construct many underground infrastructure development projects. Recently, MRT Orange line is considered to be one of the most difficult projects in Bangkok because the tunnel alignment passes through the congested urban areas in the city. There are inevitable interactions be-tween existing structures and new construction, such as tunnels, intervention shafts and stations. Many under-pinning works are required along the route. The low-headroom, limited working space and vibration have become concerned issues to be considered during construction. Silent Piler is used in those constraint areas. The result of underpinning works with Silent Piler is shown in this paper.
