TRIAXIAL COMPRESSION TESTING OF FROZEN SOILS FOR THE DETERMINATION OF RHEOLOGICAL PARAMETERS


https://doi.org/10.17073/2500-0632-2017-3-18-22

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Abstract

Detailed investigation of mechanical, deformation and rheological properties of frozen soils is an actual issue, as they are basis of civil- engineering survey for underground constructions in permafrost  holding more than 50% of the territory of Russia. The majority of  modern software packages which calculate structures stability  considering stress state of soils massive, demand knowledge of  mechanical and rheological parameters defined by triaxial  compression tests. The current article presents: estimation method  of frozen soils rheological parameters by triaxial compression  testing; required equipment and the research results. The samples  of frozen soil 10 – 50 m depth from Kharasavey gas field were used  as test material. Mostly they are presented by loam, clay and sand.  The experiments were run at the range of temperature from −3°C to −6°C.. Triaxial compression testing was provided by the laboratory  equipment which allows to run experiments in the mode of  automatic load, maintenance and deformation processes  registration. Test procedure of rheological parameters identification  under conditions of long-term triaxial compression considered  incremental load Stage duration was equal to 24 hours. The  experiments were run until th specimen’s failure. As a result of the  testing, mechanical, deformation and rheological parameters for  frozen soils are defined at temperatures −3°C  −6°C. The achieved results can be interpreted in different models (Mohr-Coulomb,  Drucker-Prager, Tresca etc.). The described experiments were carried out at LLC Gazprom Geotechnology for the design of underground drill cutting s storages in permafrost.


About the Authors

V. A. Ageenko
National University of Science and Technology “MISIS”
Russian Federation
Address: Leninskiy prosp 4, Moscow, Russia, 119049


M. N. Tavostin
National University of Science and Technology “MISIS”
Russian Federation

Associate professor

Address: Leninskiy prosp 4, Moscow, Russia, 119049

 



I. S. Vakulenko
National University of Science and Technology “MISIS”
Russian Federation
Address: Leninskiy prosp 4, Moscow, Russia, 119049


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Supplementary files

For citation: Ageenko V.A., Tavostin M.N., Vakulenko I.S. TRIAXIAL COMPRESSION TESTING OF FROZEN SOILS FOR THE DETERMINATION OF RHEOLOGICAL PARAMETERS. Gornye nauki i tekhnologii = Mining Science and Technology (Russia). 2017;(3):18-24. https://doi.org/10.17073/2500-0632-2017-3-18-22

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