BUILDING CONSTRUCTION DRAINTUBE FTB
Elevated or perched groundwater conditions can create significant disruption and structural damage, such as slab heave due to the build-up of hydrostatic uplift pressures below the slab. A passive (gravity) or active (pumping) sub-slab drainage system must therefore be considered to drain the groundwater.
DRAINTUBE® FTB geocomposite is designed to drain water from the subgrade, under the concrete slab, replacing the drainage layer traditionally made of granular material + collector drains. It has a high and stable drainage capacity over time, even under heavy loads.
DRAINTUBE® FTB sub-slab drainage system can operate under a permanent water head, i.e. constantly in the water table. The geocomposite is connected to one or more drainage trenches and to a main drain (gravity or sump).
The polyethylene geofilm needle-punched to the DRAINTUBE® FTB allows the concrete slab to be poured directly on the geocomposite, without the risk of clogging by fresh concrete.
- Efficient Drainage and Filtration even under high loads
- Proven efficiency, even constantly in the water table
- Reduction of the required excavation
- Reduction of the social footprint (less truck traffic, less neighborhood disturbance)
- Reduction of the construction time
- Easy installation with a single product to unroll
- Cost-effective and environmentally friendly solution as it replaces granular layers
- Multi-linear drainage geocomposite (ASTM D4439)
- Needle-punched polyethylene geofilm
- Perforated mini-pipes made of polypropylene
- 3 diameters of perforated mini-pipes: 16 mm, 20 mm and 25 mm
- 4 spacing options between the mini-pipes: 2 m, 1 m, 1/2 m and 1/4 m (80’’, 40’’, 20’’, 10’’)
- Standard roll size: 3.98 m x 75 m (13.1’ x 246’)
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Projects completed with DRAINTUBE FTB
Drainage under waterproofing layer and esplanade concrete slab
Philharmonie de Paris (75)
22 000 m2
Philharmonie de Paris involves many outdoor circulation areas. SOMTUBE® FTB was installed in these areas to drain stormwater run-off with a view to limiting contact with the slab waterproofing layer and preventing any risk of ground cracking.