Geotechnical Aspects of Soft Ground Tunnelling in Urban Area

This paper presents some geotechnical aspects of tunnel construction in soft ground highlighting the M.R.T Chaloem Ratchamongkhon Line, the first underground mass transit system project of Bangkok. Emphasis is made on the methods adopted in prediction of excavation and tunneling induced ground movement and building damage risk-assessment carried out for the Contract No. 1. The measured ground and associated movement of the buildings and structures were within predicted values. All deep excavation works and tunneling were successfully completed without any significant damages to the adjacent buildings and structures