Geoscience Reference
In-Depth Information
Shape and forces in geotextile
tubes (Timoshenko method)
The method described by Timoshenko [44] and used in various computer programs to
calculate the shape of filled tubes (e.g. GeoCoPS, SOFTWINN, Deltares) is based on
the tensile stress being constant over the entire circumference of the geotextile, except
for that part lying on the ground surface and with the material having no flexural
stiffness. The fill material is considered to behave as a liquid with the pressure exerted
by the fill material in the geotextile tube counteracted by the curvature and the tensile
load in the geotextile. The curvature is determined by the local pressure in the fill
material (see Figure E.1):
y
0
y
x
γ ρ
r
x
Figure E.1
Definition sketch for calculations using the Timoshenko method.
