Geosense VW PIEZOMETERS, Инструкция по эксплуатации

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30
Version 1.4 May 09
container. Check the function of the piezometer prior to its installation, using a
portable readout.
8. Carefully remove the piezometer from the water filled container and place it in
the pocket or into the socket, as shown in the sketches.
9. Coil the cable in the pocket, forming a loop as shown.
10. Lay a section of the cable into the trench and backfill the pocket and trench with
graded material as shown in the sketch. Carefully compact the material around
the piezometer by hand, and using
only
light hand held machines around the
cable.
11. Complete the cable laying operation, snaking the cable in the trench only where
specified, and backfill the trench with graded material, compacting it in layers to
ensure an adequate seal.
12. Before resuming any further filling operations, check the function of the
piezometer using the portable readout.
13. Bentonite can be used to provide additional sealing material. Either Bentonite
powder can be mixed into all the backfill material used in the impervious zones
or pellets / balls of partially saturated Bentonite can be used to form plugs at
intervals along the cable route ( see sketch ).
(Continued from page 29)