Cavidrain Invert
Cavidrain® Invert has been optimised for high in-plane flow to mitigate problems caused by mineral calcification.
Cavidrain Invert
Cavidrain® Invert provides a pre-formed drainage layer into which the concrete floor slab can be easily cast. Cavidrain® Invert replaces the crushed stone and pipes traditionally used to collect and transport away infiltration water.
Applications
- New tunnel construction
- NATM constructed tunnels
- Cut & Cover tunnels
- Drill and blast tunnels
- TBM tunnels
- Metro underground stations
- Cable tunnels
- Highway tunnels
- Railway tunnels
Benefits
- Simplified invert drainage system
- Reduced excavation requirements
- Significantly reduced project time scales
- Materials & labour cost reduction
- Reduced installation requirements compared to traditional invert drainage methods
- Improved drainage capacity
- Minimised damage caused by mineral calcification
- Designed in bespoke panels to suit tunnel dimensions
Once installed the load capacity of Cavidrain® Invert is equivalent to the strength of the concrete used.
Traditional tunnel invert constructions favour the extensive use of crushed stone together with a longitudinal collection pipe. There is a significant cost in time and money associated with excavating the trench, crushing and grading the stone before installation. Large quantities of stone are also required to meet drainage requirements.
Cavidrain® Invert provides a pre-formed drainage layer into which the concrete floor slab may be cast and replaces both the invert trench and pipe to collect water from the tunnel invert. Cavidrain® Invert has an in-plane water flow capacity far in excess of crushed stone. Installation is fast and cost effective as excavation and material movement is significantly reduced. The Cavidrain® Invert profile is optimised for maximum bearing area and has been designed to withstand the compressive loads arising from the placement of wet concrete. Once the concrete has cured, the ultimate load capacity of Cavidrain® Invert is that of the concrete infill.
Cavidrain® invert has been used successfully throughout the world in a number of major tunnel projects.
Typical Client Profile:
- Tunnel Engineers
- Tunnel Contractors
- Railway Engineers
- Consulting Engineers
- Utility Service Providers
- Waterproofing Contractors
Related Products
The following similar products provide solutions for drainage and may be relevant:
- Cavidrain® Liner
- Cavidrain® Protector
- Fildrain Strips
Associated System Products
Within a tunnel construction, our technical team are at hand to discuss you unique requirements. The following products may be used in conjunction with Cavidrain:
ABG Technical CPD Presentations
If you are interested in an ABG technical CPD seminar on tunnel drainage, please register you interest by clicking here
Product Literature
ABG Green Bridges and Tunnels BROCHURE
Cavidrain Tunnel DrainageCase Studies
ABG Tunnel Drainage Invert Deckdrain Pladutsch, Graz, Austria CASE STUDY
ABG Tunnel Drainage Cavidrain Invert Legacy Brisbane Australia CASE STUDY
ABG Tunnel Drainage Cavidrain 60 Black Hill Tunnels Hong Kong CASE STUDY
ABG Tunnel Drainage, Cavidrain Invert, Sydney Australia CASE STUDY
ABG Tunnel Drainage Cavidrain Invert Brynglas M4 Motorway Newport UK CASE ST..
ABG Structural Drainage Basement Drainage Cavidrain Dounreay Nuclear UK CASE STUDY
Installation Guidelines
ABG Cavidrain Invert INSTALL
Cavidrain Invert - Cavern/Station Box Invert DrainageFeatures and Articles
Innovative Tunnel Drainage by Alan BamforthTechnical Papers
Carbon Footprint 2019: Company and Product Assessments
Water Flow within a Drainage LayerMaterial Safety Data Sheet (MSDS)
ABG Cavidrain MSDSContact ABG for further information
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