Groundwater drainage

PROBLEM:
During the construction of a water ponds, flows of underground water and water tables can be intercepted, wich must be drained to eliminate the hydrostatic pressure and guarantee the stability of the structure.

SOLUTION:
The fitting of INTERMAS geocomposites below the waterproofing allows:

Interception of underground flows.
Lowering the water table.
Cutting capillary ascents in clayey and loamy soils.

As INTERMAS geocomposites protects the geomembrane, it is not necessary to fit heavy protection geotextiles.

Gas venting

PROBLEM:
When designing and building a water ponds, it is advisable to analyse the presence of biogas in the subsoil (decomposition of organic material). The perfect impermeability of HDPE geomembranes is an impenetrable barrier to the gas on its route upwards. It accumulates below the geomembrane and exercises continuouspressure on the plastic. Pockets of biogas form, breaking the membrane and destabilizing the water ponds.

SOLUTION:
INTERMAS geocomposites fitted bellow the geomembrane is the solution.

It intercepts the ascent of gas.
It quickly conducts it to the grooved drain pipes (which direct it away from the area occupied by the basin)
It eliminates the pressure due to trapped gas.
It prevents the formation of dangerous pockets of biogas.

INTERDRAIN Channels

Canal

Geocomposite drains are installed under the containment liner to avoid fluid pressure buildup and as a leak detection layer to create a void space through which leaking fluids can be detected and displaced outwards. Formed by a biplanar HDPE geonet thermally bonded over one or both sides to nonwoven PP geotextiles.

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Contributions

-Improves the drainage capacity or completely replaces the natural drainage layer -Homogeneous drainage solution that follows strict quality control procedures -Simple and aesthetic design that harmonically complements other geosynthetic systems -Lightweight and flexible composition -Highly robust and resilient, able to withstand the loads applied during installation -Chemically inert and imperishable -Fast, easy and reliable installation, does not require heavy machinery or qualified staff -Outstanding transportation capacity -Easy to store and protected against external agents -Low carbon footprint

Features

-High transmissivity -Low core compressibility -Stable transmissivity over the long term in accordance with GRI GC13 Specification -Suitable for installation over steep slopes -Customizable geotextiles -Under ISO and ASTM Standards -In accordance with GRI GN4 Specification -Rolls up to 4-m wide and customizable length