A New Zealand Geotechnical Society Symposium paper. I believe you will find it interesting. Open Access article. No paywall.

Pre-excavation grouting for groundwater ingress control in tunnelling – Auckland, New Zealand

This paper outlines the unique challenges and design for dealing with high groundwater inflow in the East Coast Bays Formation, the construction methodology used in a segmental lined tunnel and efficacy of the pre excavation grouting used where necessary in some of the cross passages. An effective seal was achieved through the pre-excavation permeation grouting.

https://www.nzgs.org/libraries/nzgs20_mccarrison/