Soakaway Crate Kits – Includes Geotextile and Tape!

Order a Soakaway Crate Kit Online – Easy Cost Effective Solutions.

Chose from 1m3, 1.25m3 and 1.5m3 kits.

Dimension (Per Crate): 690 (L) x 410 (W) x 450 (D)
Load Rating: 40 Tonne
Void Ratio: 95%
Single Crate Weight: 9.17kg

How it works – Geocell Soakaway Crates:

Stormwater enters the plastic soakaway crates attenuation tank through the inlet pipe, which could optionally include a silt trap with silt bucket (sold separately). Water passes through the tank and exits into the ground around it releasing the water slowly stopping flooding. The tank is wrapped in a non-woven goetextile. Non woven is used because it allows water to pass through it. Please do not use woven membranes with these kind of system as they do not efficiently release the water. The membrane stops any dirt getting into the system which would reduce it’s effectiveness.

Don’t forget to perform a percolation test prior to installation. We have a guide in our blog section detailing how to do this. This will ensure that the ground is suitable and is able to release the water effectively.

Soakaway:

The soakaway is normally best constructed as a long narrow structure. The inlet pipe comes in at roof level and faces downwards so the water can percolate into the tank. The blocks are wrapped in Geotextile, to protect them and to keep clay from filling up the empty space. An air vent pipe is installed on the maximum height point with a cowl at the top or it can be vented back into an inlet manhole. There’s no outlet from a soakaway, therefore no flow control unit is required.

Benefits:

● 100% sealed tank
● 12 years experience as a market leader
● Quick installation – reduce site access delays
● Increased land usage – tanks are subsurface
● Economical – generally more cost-efficient than any other equivalent sealed tank
● Cost-effective – reduced costs for excavation and disposal of the material
● Modular – easy to create any shape
● Strong – designed to support shear loading
● Lightweight – no cranes required
● Determinate volume – one cubic metre of matrix tank modules contain 950 litres of water, whereas stone fill will only provide 300 litres of storage per cubic metre.

Design Criteria:

The soakaway attenuation tank is assembled using matrix module blocks. These blocks can take passing loads of up to 40 tonnes/m2. The void ratio of every block is 95%. The soakaway crates are made from polypropylene. The tank is sealed with a layer of geotextile membrane, which is completely welded together to make a 100 percent seal. All pipe penetrations should be fully sealed into the geotextile membrane. The membrane is shielded by a layer of heavy-duty protection geotextile, to prevent damage from construction or backfilling. A range of air extraction vents/flushing points are then placed in the roof of the tank.

Note:

It’s crucial that the underground tanks are totally sealed, otherwise soil water and silt particles can enter the void space and consume capacity. Preferably, the bottom of the tank must be 500mm above the groundwater level. Otherwise, floor water relief measures must be put into place.

Specification (Single Soakaway Crate)

• Weight (maximum): 9.17kg
• Crush Strength (up to): 400kN/m2
• Lateral Strength: 80kN/m2
• Minimum Cover: (green areas) 500mm(trafficked areas) 650mm
• Maximum Cover: 3m
• Material: Polypropylene
• Void Ratio (Internal): >95%
• Tank storage capacity (m3)
• Depth restrictions
• Location (Road, Car Park, Green Area)
• Design constraints on site

* Modules tested using UKAS calibrated test machine, range 0 – 60 Tons, UDL, loading rate 0.2 kN/m2
** Modules tested for long term creep testing for 90 days and new on-going tests.
# Any cover less than 450 mm – contact us

Geocell Soakaway Crate Brochure
Geocell Installation Guidelines