Case study

Chennai Metropolis in India has been growing rapidly due to the increase in traffic volumes on the road


Chennai Metropolis in India has been growing rapidly due to the increase in traffic volumes on the road. To combat the rise in traffic, the need for a new rail based transport system was envisaged by the Government of Tamil Nadu resulting in implementing the Chennai Metro Rail Project.

The project aim is to provide the people of Chennai a fast, reliable and convenient mode of public transport, which can be properly integrated with other forms of public and private transport including buses, sub-urban trains and MRTS services.

The total area covered by Chennai metro project will be 45.1KM, of which 23.1KM is underground and 22KM elevated.


The ground is made up of different types of solid materials of various origins and empty spaces due to which the surface is permeable and leads to accumulating water above the ground.

Groundwater: As the surface was wet due to which our membrane was not acquiring proper bonding with the concrete mud surface, so it was difficult and a long process.

Ground unevenness: As the surface was not leveled, it was affecting the laying of the membrane.

Watertightness: As the PCC was not properly compacted, the surface became porous and water started rising through the void and made the surface wet.


Ground water control was an important consideration in the design of Waterproofing works, we had to remove the excess water and to make the surface leveled. As the surface was damp water-based primer was used (TIKI PRIME W) that not only made the surface plain but also developed a strong bonding between HYDROSTOP 4PY-P and Concrete surface. Apart from this, Watertightness was an important parameter as Underground structures are normally exposed to external water pressure, and joints must therefore be treated properly. Watertightness of the structure must be ensured by designing a watertight concrete, the use of watertight joints and right use of waterproofing membranes.

A safe and reliable waterproofing solution was required to prevent any water ingress through and around the base slab. Dense steel reinforcement within the base slab and the complicated detail at the intersection between the cast slab and the sprayed concrete lining, meant that traditional rear-guard water bars were not an option to seal the joint. The new, innovative, fully bonded waterproofing membrane system HYDROSTOP PLUS 4PY-P was provided to prevent water ingress through the base slab. It is a completely engineered solution, which produces a mechanical bond with the concrete, and incorporates a unique grid pattern of sealant that prevents any lateral water underflow and migration between the membrane and concrete. HYDROSTOP PLUS 4PY-P is easy and simple to install. Jointing solutions were installed around the perimeter of the slab to protect against any water ingress at the interception of the slab and the walls.

TIKIDAN, being the waterproofing expert, is able to provide a comprehensive and custom made waterproofing solution.

Area TIKIDAN Waterproofing System

Project Name
Chennai Metro
Project Owner
Chennai Metro Rail Ltd
Project Type
Project Scale
HYDROSTOP 4PY-P: 21915 m2


  • — HYDROSTOP 4PY-P:21915 m2
  • — HYDROSTOP PLUS 4PY-P:50697 m2

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