The project required a seepage control structure through 260 metres of permeable seawall to enable the safe excavation of high-grade iron ore up to 60 metres below sea level. Wagstaff Piling developed the following innovative techniques to create the seepage control structure: low pressure permeation grouting, high pressure jet grouting, innovative hybrid grouting techniques involving intermediate pressure grouting and high-pressure jet grouting. Wagstaff Piling’s early involvement with the client and the consultants enabled innovative grouting techniques to be successfully developed and executed in difficult site conditions.
