100 Jet Grout Projects-Day 5

JET Grouting! 🛩️

We are finishing Jet Grouting Week on a HIGH note with one of our Sydney Airport projects!
The Runway End Safety Area (RESA) was part of the upgrade plan for the Sydney International Airport to achieve compliance with new international safety requirements. The extension of the East-West runway involved the construction of a 90mx90m land bridge spanning over the heritage-listed main Sydney Southern Sewer (SWSOOS), the M5 motorway, a tunnel at this location, and a new underground Perimeter Road for the airport.

The construction of the underpass for the Perimeter Road below the SWOOS, to a depth of 6m below sea level, was mostly in soft clay and posed specific geotechnical problems.
Stringent requirements limited movements in the sensitive SWSOOS structure and the piles supporting it to a few millimeters; complex staging, difficult ground conditions, and a number of site constraints dictated a very comprehensive design supported by finite element analyses using Plaxis Modelling.

Menard used Jet Grouting, to resolve the multiple problems of ground stabilisation and thereby facilitate the construction of the cast in situ underpass. Temporary works involved a buttressed cofferdam of interlocking jet-grouted columns designed to prevent water ingress and provide ground retention around the underpass structure.

Contact us to find out how we can apply Jet Grouting or one of our many other ground improvement techniques to your project.

#jetgrouting #groundimprovment #civilengineering #sydney #airport #menard