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Effect of freeze-thaw cycle on mechanical properties and stability of soft rock slope

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Document pages: 10 pages

Abstract: In order to explore the variation law of mechanical parameters of soft rock and the stability of slope, the freeze-thaw cycle test was carried out on the collected soft rock materials. At the same time, the stability of freeze-thaw slope is calculated and simulated. The key factors affecting the strength of frozen rock specimens are analyzed. The results show that water content and freeze-thaw cycles have significant effects on the mechanical parameters of soft rock. With the increase of water content, the cohesion of frozen soft rock specimens decreases as a quadratic function, and the internal friction angle decreases as a negative index. Stability coefficient of soft rock slope under seasonal windze soil area declines continuously. With the increase of freezing and thawing cycle, both cohesion and internal friction angle of soft rock decrease exponentially. The higher the moisture content, the quicker the reduction. Such stability coefficient presents a negative exponential reduction. After three freezing and thawing cycles, the slope stability coefficient only changes slightly. Findings were finally verified by the filed database.

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