2030
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
Using a complex constitutive law for the viscoplastic stockpiled
material, developed at the Institute and the Laboratory of
Geotechnics of TU Darmstadt, the numerical simulations of an
extension of a heap and the influence on a railway track were
investigated. The comparison of the results of the numerical
simulations and the monitoring program shows a good
accordance.
The developed constitutive law can be judged as a robust,
efficient and purposeful material routine which offers an
instrument for the simulation and investigation of complicated,
time variant systems using numerical simulations.
6 REFERENCES
Ankes, A. 1972. Untersuchung bodenphysikalischer Eigenschaften von
Rückstand.
Dissertation an der Fakultät für Technische
Wissenschaften der Bergakademie Freiberg.
Boley, C. 1999. Untersuchungen zur Viskoplastizität und Festigkeit von
Steinsalz.
Mitteilungen des Institutes und der Versuchsanstalt für
Geotechnik der Technischen Universität Darmstadt, Heft 48
.
Chumbe, D., Lloret, A., Alonso, E. 1996. Creep and permeability tests
on compacted granular salt.
4
th
Conference on the Mechanical
Behaviour of Salt,
Montreal, Canada, 331-339.
Fordham, C.J. 1988. Behaviour of granular halite for use as a backfill in
potash mines.
Dissertation at University of Waterloo, Canada
.
Figure 11. Cross sections for the analyses of the deformation of the
railway track.
The measurement point MR 54 had a horizontal displacement of
0.30 m before it was covered with salt. After the covering no
further measurement data for this point existed. The
measurement point MR 51 had a horizontal displacement of
0.45 m before it was covered with salt.
Katzenbach, R., Giere, J., Seip, M. 2004. Stability and serviceability of
a railway track and a gas pipeline at the base of steep creeping
slopes.
1st EuropeanRegional International Association for
Engineering Geology Conference
, Liège, Belgium, 11 p.
Katzenbach, R., Giere, J., Seip, M. 2006. Aspects of safety and
serviceability of heaps with viscoplastic materials due to man-made
liners or natural slip-surfaces.
Geo Environmental Engineering
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, Kyoto, Japan, 237-244.
Munson, D.E., Wawersik, W.R. 1991. Constitutive modelling of salt
behaviour – state of the technology.
7
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International Conference on
rock mechanics, Workshopon Rock Salt Mechanics
, 1797-1810.
Wachter, S. 2009. Dreidimensionale, zeitvariante stoffliche
Modellierung von granularem Steinsalz.
Mitteilungen des Institutes
und der Versuchsanstalt für Geotechnik der Technischen
Universität Darmstadt
, Heft 82.
Wachter, S., Katzenbach, R. 2009. CAPCREEP – Ein
benutzerdefiniertes
Stoffmodell
zur
Untersuchung
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Bauingenieur 84
, Heft 9, 368-373.
Figure 12. Geodetic and geotechnical monitoring program.
For calibration of the numerical simulations the calculated
displacements are compared to the measurement data. In result
numerical simulations supply horizontal displacements in a
comparable range.
5 CONCLUSIONS
Due to the storing of granular residues of potash production on
large tailings heaps enormous loads are transferred into the soil.
In this context vertical and horizontal deformation occur even in
a distance of hundreds of metres. For analyses of the ultimate
limit state and the serviceability limit state of the heaps and
infrastructures and buildings in the area of influence realistic
simulations are necessary.
