Abstract
For stability analyses as well as for predictions of the future geomechanical behaviour of underground openings in salt rock strata, proper calculation tools are needed. Numerical calculation methods and material laws are required to describe the mechanical behaviour of salt. A proposed new material salt creep law describes the deformation-hardening behaviour of the transient creep phase, which gives a good description for a relatively short time after the excavation phase and can, by considering the recovery of the hardening, also be extended to the stationary creep phase, which is significant for long times after the creation of openings. The developed material law also includes inverse transient creep, which takes place during load reductions. This material law is used for the back-analysis of all common types of lab tests (compression, creep and relaxation) as well as for some field measurements. The material creep law was implemented into the ITASCA codes FLAC (ITASCA 1998) and FLAC3D (ITASCA 1997).
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© 1998 Springer-Verlag Wien
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Salzer, K., Konietzky, H., Günther, RM. (1998). A New Creep Law to Describe the Transient and Secondary Creep Phase. In: Cividini, A. (eds) Application of Numerical Methods to Geotechnical Problems. International Centre for Mechanical Sciences, vol 397. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2512-0_36
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DOI: https://doi.org/10.1007/978-3-7091-2512-0_36
Publisher Name: Springer, Vienna
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