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SECANT PILED SHAFT CONSTRUCTION AND MICROTUNNELLING IN SAND

Session: Transportation and Linear Infrastructure I / Transports et infrastructures linéaires I

Aiden Horan, Ward and Burke Microtunnelling Ltd. (Canada)
Scott Peaker, SPL Consultants Ltd. (now WSP Canada) (Canada)

This paper outlines the installation of three 18m deep shafts up to 8.2m internal diameter, and two tunnels with an internal diameter of 1.2m in sand with the water table near the ground surface. The shafts were constructed using the secant piled method while the tunnels were constructed via microtunnelling. The challenges and problems associated with these difficult installations are presented, as well as the solutions used to overcome and mitigate the issues encountered.