Abstract
Repeated dry-wet cycling can substantially alter rock mechanical properties, which poses a serious risk to the safety and stability of geotechnical engineering projects. Shear creep tests were performed on granite samples subjected to dry-wet cycling to determine the performance deterioration and variation of creep properties under hydraulic weathering conditions. The mechanism by which dry-wet cycling influences the creep properties of granite analyzed and discussed. The experimental results show that the creep deformation of granite gradually increases with increasing dry-wet cycle number, whereas the creep failure stress, creep duration, and long-term strength significantly. The effect of dry-wet cycling on the microscopic structure of granite analyzed longitudinal wave velocity and resistivity. A variable-parameter creep damage model is proposed that considers the effects of dry-wet cycling on granite based on the experimental results. A comparison between the experimental and theoretical curves verifies the model accuracy and applicability. This study provides a useful reference for the support design of geotechnical engineering projects under dry-wet cycle conditions.
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Data availability
The datasets generated and analyzed during the current study are available from the corresponding author upon reasonable request.
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Funding
This work was supported by the National Natural Science Foundation of China (No. 51678101, No. 52078093), the Basal Research Funds for the Central Universities (No. 3132014326), and LiaoNing Revitalization Talents Program (No. XLYC1905015).
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Zhang, F., Jiang, A. & Yang, X. Shear creep experiments and modeling of granite under dry-wet cycling. Bull Eng Geol Environ 80, 5897–5908 (2021). https://doi.org/10.1007/s10064-021-02282-7
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DOI: https://doi.org/10.1007/s10064-021-02282-7