Tricel Pumping Chamber 2600, Manual

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A ‘ Wet Site’ is a site in which the water table may rise higher than 300mm from the base
of the tank. Tricel strongly advise the installation of a vertical water table inspection
pipe. This will facilitate convenient monitoring of the water table long after the
installation is completed.
Note: In difficult soils (e.g. clay with a high t-value), a site could be potentially classified
as wet if there is no drainage for surface water that enters the excavation and it rises
higher than 300mm above the base of the unit. The installer must determine this when
selecting the correct backfill.
2. Is a riser required, and if yes, what height riser must be installed? (For more information on
risers, please see Section 5.9).
The following table specifies the required installation for on-site conditions:
Factors that determine the required installation
Installation Required
Type of Site Riser Required
Dry None Gravel
Dry 250mm Gravel
Dry 500mm & 750mm Concrete
Wet None Concrete
Wet 250mm, 500mm & 750mm Concrete
Important
•
Incorrectly installed tanks that are subject to movement, rotation or floatation may become
damaged, for which Tricel cannot accept liability.
•
During installation, tanks must not be subjected to buoyant forces.
•
Contact a qualified engineer if there are difficulties on site due to adverse water logging.
•
Ballasting the tank is important to avoid the tank from lifting when backfilling.
5.5 Installation Procedure
5.5.1 Excavation (Dry & Wet Sites)
5.5.1.1 Excavation: Length & Width
Length and width of the excavation must exceed the dimensions of the Tricel Pumping Chamber by at least
500mm to maintain a minimum space of 250mm all around the tank.
Tricel Pumping Chamber
Tank Length
(m)
Tank Width
(m)
Min. Excavation Size (L x W)
(m)
2600 1.6 1.64 2.1 x 2.14
4000 2.6 1.64 3.1 x 2.14
Note: The size of the area to be excavated applies to both dry and wet sites, however, unstable ground with
excessive sand, peat swamps etc. may require larger excavations. The excavation should be maintained dry
by pumping or whatever suitable means.