Multifunctional geogrids

• grid embedded in nonwoven filter layers
• One-step easy installation
• Optimal interaction with the sub-grade
• High modulus, low strain (Enkagrid TRC)
• Geogrid and nonwoven geotextile together

Functions:
Stabilization+ Filtration+ Separation

Geosynthetics erosion mats-Fields of applications

Fields of application of erosion control geosynthetic mats

• erosion prevention for embankments and slopes
• protection of riverbanks against erosion
• support of vegetation on steep slopes and geomembranes

What is a PVD ?

• Prefabricated Vertical Drain - PVD
• Also called as wickdrain.
• Used for soil consolidation, settlement instead of sand drains.
• Typically 95 -100 mm wide by 3 - 5 mm thick
• Synthetic core wrapped with geotextile
• The core may be produced from different polymers (PVC, PP, PE or mixtures ...)
• The geotextile jacket type can differ depending on the producer.
• There are also many core types in the market.

Steel water storage silo / tank

Another usage of geosynthetics materials are in steel water reservoirs.

These are very practical and easy to use water storage systems.

They come with all the parts inside and you construct it on site.

Their heights are upto 4.64 meters and diameters vary from 1.85 to 30.95 meters.

Inside the steel construction there is a nonwoven geotextile liner to protect the waterproof tank liner. The tank liner can be made of PVC or other type of polymers depending on the usage.

Basement drainage of a congress hall building construction

Geocomposite drainage sheets can also be used in higher depths. Photographs here shows some applications of drainage composites. They are ready to backfill. The backfill around the composites should be made very carefully because of the height. Direct flow of gravel and backfil materials may tear or damage the drainage materials.

This drainage composite was placed on the waterproofing layer.

For house basement drainage please check other drainage posts.

Roof garden tips

Now it is spring and you may want to prepare a green roof. You know roof garden does not mean a garden on the roof only. It may be top of an underground garage or top of a underground structure.

An important thing is not to forget the drainage core of the drainage sheets or layers with a nonwoven (may be woven but non woven is cheaper) filter fabric.

The ready made drainage products already have filter on them. But you have to wrap filter on the drainage core. Otherwise the soil, gravel or etc may go inside the drainage layer and block the drainage or at least decrease the amount of water to be drained.

Drainage sheets are used to remove excess water.

On the drainage layers you may use a water retention layer depending on where you live.

For more information on green roof solutions check our roof garden section for all posts of this subject.