Open

Product by Category > Drainage Systems > Cavidrain® – Tunnel Invert Drain


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

Cavidrain® Invert provides a pre-formed tunnel invert 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.

Traditional tunnel invert constructions favour the extensive use of crushed stone together with a longitudinal collection pipe. There is a significant cost in both time and money associated with excavating the trench and 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.

major tunnel projects.

Typical Client Profile

  • Tunnel Engineers
  • Tunnel Contractors
  • Railway Engineers
  • Consulting Engineers
  • Utility Service Providers
  • Waterproofing Contractors



Latest Posts

May 10th, 2024

Geosynthetics in Railways

Right across the world, geosynthetics are used to aid in not only the construction of railways but more importantly, to prolong the life of the track and reduce the need for maintenance. Some of...

Read More
March 14th, 2024

Sustainable engineering solutions for natural disaster rehabilitation, recovery and resilience – Part 2

Review of Part 1: The Engineering solutions for natural disasters include: (1) sustainable engineering solutions for quick and economical yet technical and durable rehabilitation and repair of...

Read More
February 22nd, 2024

An Effective and Economic Solution to Ground Improvement

Poor ground usually has characteristics such as high-water content, low strength, easy compression and deformation, and is significantly affected by earthquakes. Therefore, it is necessary to truly...

Read More
February 16th, 2024

Sustainable engineering solutions for natural disaster rehabilitation, recovery and resilience – Part 1

Introduction The Engineering solutions for natural disasters include: (1) sustainable engineering solutions for quick and economical yet technical and durable rehabilitation and repair of the...

Read More


If you would like further information
about any of our products please

Contact Us
Contact Us