Homebush Bay Rail LinkHomebush Bay Rail Link

700 lineal metres of precast concrete arch 9 different profiles. 8 x 2.5 to 19 x 8 900 units.

Reinforced soil with precast concrete facing. 6 bridges.9,000 Square metres. Aquatic centre basement walls, 3,000 square metres 3 different panel types/finishes.

Reinforced soil with steel mesh facing. 2,000 square metres. Arch foundations plus basement walls.

Precast Concrete ArchesPrecast Concrete Arches 2 piece, 3 pinned precast concrete arch system Advanced design techniques and a flexible

moulding system supplies a customised shape and size to suit your needs

Arch DesignArch Design

Finite Element Analysis Elasto-plastic soil properties with

varying elastic modulus (“Duncan model”); concrete linear elastic

Vertical and horizontal soil pressure and soil structure interaction determined by finite element analysis

Construction sequence modelled in the analysis, including compaction loading

Friction elements to allow slip between soil and arch

Arch ConstructionArch Construction Once the first 4 units are installed, 1 crane can be

used for installation

Constraints on Arch DesignConstraints on Arch Design

Cover over crown of arch Volume of excavation Stability under train impact loading Complex geometry Waterproofing of the precast joints

Typical Arch SectionsTypical Arch Sections

Arch ProfilesArch Profiles

Twin Tunnels and the Twin Tunnels and the StationStation

Section Through Twin ArchesSection Through Twin Arches

Arches supported on steel mesh Arches supported on steel mesh faced reinforced soil wallsfaced reinforced soil walls

ConclusionConclusion Fast-track design and construct programme Driven tunnel reduced disruption Architectural finishes developed in conjunction with

architects and suppliers Precast arch solution to the cut and cover tunnels provided

economic and rapid construction without loss of construction flexibility

Design applied principles of Ecologically Sustainable Development

Reinforced soil and arch structures are inherently energy efficient, using soil-structure interaction to utilise the compressive strength of soil

Green concrete at the Homebush Bay Green concrete at the Homebush Bay Rail LinkRail Link