Installing the underground system

The underground collection container system is easy to install. H&G’s underground systems are available with a base made of concrete or hot-dip galvanised steel, depending on customer wishes and/or requirements. Depending on requirements/regulations, a foundation pit must be excavated for the foundation container. If possible, the ground at the location should slope away from the system, as any gradient towards it will require the building of a drainage gutter.

A base course of gravel is laid on a stable subgrade in the foundation pit. The pre-installed base containers have four suspension points and can be lifted into position using a 4-strand chain hoist of the appropriate length and load-bearing capacity. The Europa’s foundation container is set into the foundation pit by a crane and then aligned appropriately. If the system includes several foundation containers, they can be installed touching together or with a clearance gap between them.

The spaces at the sides of the foundation container are to be filled with layers of material that allows good drainage. This is then to be compacted in such a way that guarantees the function of the drainage slits in the upper frame (2 per side). These slits allow rainwater to drain away down the sides into the ground. The surrounding surface is to be returned to its normal state, in accordance with the specifications. To ensure the surface, which also functions as a walkway, fits into the surroundings as inconspicuously as possible, steel floor plate, red, green or black and white EPDM rubber or even paving can be used.