Sydney Metro is Australia’s biggest public transport project. From the north west, metro rail is being extended under Sydney Harbour, through new underground city stations and beyond to the south west. In 2024, Sydney will have 31 metro railway stations and a 66km standalone metro railway system, revolutionising the way Australia’s biggest city travels.
Geotesta Engineers provided geotechnical instrumentation and monitoring of the stations construction and tunnelling works. Geotesta provided its specialized services at the following stations: Chatswood; Crows Nest; Victoria Cross; Barangaroo; Martin Place; Pitt Street; and Waterloo; installing a series of instrumentation sensors to monitor ground movement and groundwater fluctuation during construction. In addition to that, Geotesta were involved in installing a series of Shape Accel Array or serial accelerometer in the crown of the existing Cross City Tunnel to monitor the ground movement.
Moreover, Geotesta provided geotechnical assessment and analysis for the demolition of existing building, retention systems and preparation of temporary ground works at Pitt Street and Martin Place Stations.
The works in urban environment in a busy metropolitan city such as Sydney required complex logistics to enable the works to be completed within a tight timeframe and sometimes difficult access conditions. The works demonstrated Geotesta capability in managing the geotechnical instrumentation works and analysis based on more than a decade of experience of geotechnical practice in Australia.