Backfill The Excavation Pit; Taking The Influence Of Foundation And Floor Slab Into Account - Kessel LW1000 Instructions De Pose Et D'utilisation

Route the ventilation pipe above the backwater level using a seal for pipe penetration.
Installation in the taper (A)
Use scoring surface (1) for passage.
Installation in the intermediate section (B)
Choose a suitable scoring point (2) for passage.
4.7

Backfill the excavation pit

CAUTION
Note the structural calculations for traffic safety. Chamber installation for load class D makes a load distribution plate
made of reinforced concrete necessary (exception: not necessary for standard road construction).
Determine the required load class and structural calculations in accordance with the environment / use condi-
tions.
Request an appropriate reinforcement drawing from the KESSEL hotline.
Fill the excavations with crushed stone (0-16 mm diameter), at least 50 cm all around; place in layers of maximum 30 cm
and compact each layer of fill material properly to 97% Dpr (e.g. using vibrating plate).
The required excavation pit slope angle β must be observed all the way round.
The assignment of internal frictional angle φ of the fill material, and permissible excavation pit slope angle β must be car-
ried out in accordance with EN 4124.
4.7.1

Taking the influence of foundation and floor slab into account

If the chamber is to be positioned in such a way that it is
inside or near a building later, the following additional pre-
requisites must be taken into account.
Adjacent foundations
The chamber must not be installed in a spot where it could
influence adjacent foundations, i.e.
minimum distance a = distance between the bottom edge of
the chamber and bottom edge of the foundation:
a = ΔH x 1.73
In addition, the floor slab near the chamber must not be
used for calculating the traffic load for the building.
Touching floor slab
Under the floor slab, a layer of polystyrene approx. 5 cm
thick with an excess depth of around 20 cm must be
included in order to prevent any settling of the concrete slab
leading to large vertical loads in the chamber.
Otherwise the chamber could have the effect of a stake.
The chamber structure must be designed in such a way that
the polystyrene layer is on level with the height-adjustable
upper section.
(1) 5 cm polystyrene layer
32 / 100 Engineering chamber LW 1000 /
Installation and operating instructions
010-701