f The Sudden Subsidence (Sinkhole) in Musafah Highway, Abu Dhabi, Associated with Localized Collapse of Subsurface Cavity During Micro –Tunnelling

Geophysical investigation was conducted to assess /evaluate the ground subsidence (sinkhole) that took place at the road way during the installation of new sewer pipe with micro-tunneling across the main road of Musafah in October 2011. A geophysical surveys were completed within this site during November, 11 and 12, 2012. The survey utilized Electrical Resistivity Tomography (ERT) and Multi Analysis Surface Wave (MASW) methods, to identify possible subsurface fractures/voids, less competent rock, or saturated areas that may contribute to the sinkhole development under the main Musafah road.