Short And Cumulative Long Term Impacts Of Subterranean Cut-off Walls And Excavation Dewatering On Adjacent Structures In Urbanised Areas

This paper describes the hydrogeological and geotechnical assessment in relation to the short and cumulative long-term impacts associated with excavation, subterranean construction and dewatering in the Double Bay commercial area on the structural integrity of adjacent residential and commercial buildings. The paper comprises three main components, namely, (i) definition of groundwater study area and its geological and groundwater settings; (ii) assessment of potential cumulative impact of future developments on long-term groundwater change; and (iii) assessment of potential impact of short-term construction dewatering on risks of damage of adjacent buildings.