Geoscience Reference
In-Depth Information
Minimum required circumference of a geotextile container (sand)
25
23
sufficient
21
19
b
0
= 1 m
b
0
= 1,5 m
b
0
= 2 m
b
0
= 2,5 m
b
0
= 3 m
17
15
insufficient
13
11
9
7
5
0
2
4
6
8
10
12
14
16
18
20
Cross-section (
A
) [m
2
]
Figure 6.5
Minimum required circumference of a geotextile container (according to formula 6.2) as a
function of the filled cross-section and opening width of the split barge. For example, a split
barge with a maximum opening width of 2 m, a geotextile container filled with sand and a
filled cross-section of 10 m
2
, a minimum circumference of 17.5 m is required.
6.4 FAILURE MECHANISMS AND SAFETY
CONSIDERATIONS
For a structure using geotextile containers, the following failure mechanisms have to
be considered:
weakening/rupture of the geotextile and/or seams on the geotextile container
leaving the split barge;
rupture of the geotextile and/or seams upon container impact on the bottom;
failure of the geotextile under the action of waves and/or currents;
loss of stacking stability of the geotextile containers;
damage due to construction works;
damage due to any surface finishing (for example during installing an armour layer);
sand migration within or from the geotextile container;
draining retained material (subsoil/sand behind the geotextile containers) when
using geotextile containers as bank protection;
sand scour from underneath the geotextile containers due to water currents or
wave action;
degradation of the geotextile (creep, UV radiation, etc).
