Tunnel integrity

Drips, cracks and seepage – they are common tunnel issues.

Capiphon™ pipe can be installed in the walls and ceilings of tunnels during construction, and Capiphon™ belt installed under the road. This comprehensive approach to drainage will prevent water rising into the tunnel, dripping from tunnel ceilings, or seepage through the walls.

Water Is Un-Stoppable, Especially In Tunnels

Tunnels have become a popular method of solving traffic and transport issues around the world. They are often constructed with a waterproof membrane to prevent water from seeping into the tunnel. But over the years it has become evident that these membranes will fail. As many tunnels are built in the rock bed below rivers, water has been, is and always will be a problem for tunnel construction and maintenance.

Capiphon™ drainage was invented by Robert (Hu Ming Chun) who is an expert in civil engineering and specializes in tunnel construction. This never-ending problem of seepage was in fact the reason he invented the Capiphon™ solution.

Ideally the Capiphon™ belt will be embedded during construction. Robert recommends that it go under the invert ring segment where it will form a blind trench. HoweverCapiphon™ can also be used to solve problems with existing tunnels. Drill holes can be used to insert Capiphon™ pipes. These will effectively drain the water that is seeping into the tunnel and maintain the integrity of the structure.

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Tunnels + Rivers = leaks

These photos show how Capiphon™ drains were installed in an existing tunnel under the Huangpu river. Construction joints in the ShangHai underpass were allowing significant seepage into the tunnel. Once the Capiphon™ pipes were inserted, there has been no further sign of seepage. The Shanghai Municipal Government were very happy with this result and intend using the same solution to solve many other tunnel leaks around the region.

  • Tunnels
  • Tunnels
  • Tunnels