Journal
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
Volume 77, Issue 2, Pages 573-580Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10064-017-1013-8
Keywords
Freeze-thaw cycles; Freeze-thaw coefficient; Degree of weathering; Slope stability; Safety factor
Funding
- National Natural Science Foundation of China [41502327, 51474252]
- Special Research Fund for the Doctoral Program of Higher Education of China [20130162120012]
- Innovation Driven Plan of Central South University [2015CX005]
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The changes that occur to the physicomechanical features of rocks during freeze-thaw cycles are crucial to research on the stability of slope engineering in cold regions. In this study, granite specimens underwent freeze-thaw cycling and uniaxial compression testing. The mechanics of the freeze-thaw deterioration were analyzed based on the changes that occurred in the uniaxial compression strength, stress-strain curve, freeze-thaw coefficient, and degree of weathering of the rocks during freeze-thaw cycles. The results were applied in an analysis of the slope stability of a rock mass in an open-pit mine, and the safety factors of the slope before and after freeze-thaw cycling were computed with the Hoek-Brown empirical criterion. The results show that the mass of the granite increased and its uniaxial compression strength decreased after freeze-thaw cycling. The safety factor of the slope decreased due to the freeze-thaw cycling. This research thus shows the importance of studying the mechanics of slope engineering deterioration in cold regions.
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