Geoscience Reference
In-Depth Information
Geotextile containers
A geotextile container is a large geotextile-encapsulated sand element containing
100 m 3 to 800 m 3 sand and is dropped through water from a split barge.
6.1 APPLICATION AREAS AND GENERAL
EXPERIMENTAL DATA
Geotextile containers can be used in the following applications:
￿
To protect structures in water against scour holes by filling any scour holes with
the containers;
￿
As core material of a breakwater that is covered with armour rock;
￿
Raising the bed under the core of a breakwater;
￿
As offshore sills for beach nourishment projects;
￿
As offshore artificial reefs;
￿
As offshore submerged dykes;
￿
Quay structures made of geotextile containers, or pressure relief walls behind quays;
￿
Construction of containment dams.
Applications in the Netherlands include bank protection along the Oude Maas
in Rotterdam, bed and bank protection for the sailing route at Harlingen, submerged
breakwater at the Botjes Zandgat sand extraction site and the dam in the Cornelis
Douwes canal. These projects are described in Appendix B of [14].
6.2 INSTALLATION PROCEDURE
6.2.1 General
A geotextile container is placed in the hopper of a split barge and it is then filled with
sand (mechanically or hydraulically). The open top of the geotextile container is then
folded and sewn tight. The split barge is then positioned at the correct dropping point.
Finally, the split barge is opened and the geotextile container is dropped in the water
(see Figure 6.1).
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