SHANDONG SCIENCE ›› 2018, Vol. 31 ›› Issue (2): 113-119.doi: 10.3976/j.issn.1002-4026.2018.02.018
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WANG Yong-yan, ZHANG Jin-long, ZHU Si-wen
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Abstract:
Taking the rocklike materials made of cement and mortar as the research object, combined with related theories such as mechanics of elasticity, fracture mechanics and fluid mechanics, the calculation theoretical model for the frost heaving force of porous rock under the effect of volume expansion was derived, and a positive correlation between the frost heaving force and the bulk modulus was obtained. Through the uniaxial compression experiments for fractured specimens after freezethaw cycle and the analysis of the influence of frost heaving force on the specimens with different fracture angles, it was found that the frost heaving force had the most obvious influence on specimen with 0° fracture, and the influence of frost heaving force on the peak strength of fractured specimens was gradually weakened with the increase of the fracture angle. The exact model was put forward for the solution of frost heaving force in rock fracture, and the feasibility of model for frost heaving force was verified by experiment, which provided a theoretical basis for future research on the frost heaving force value in fracture.
Key words: crack, frost heaving force, peak strength, rock-like materials
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WANG Yong-yan, ZHANG Jin-long, ZHU Si-wen. Mechanics model and experimental research on the frost heaving force of crack rock under freezing and thawing cycle[J].SHANDONG SCIENCE, 2018, 31(2): 113-119.
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URL: https://www.sdkx.net/EN/10.3976/j.issn.1002-4026.2018.02.018
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