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A study on crack damage stress and the damage constitutive model of frozen sandstone

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Abstract

The artificial ground freezing (AGF) method has been widely used in underground engineering construction. As the main load-bearing elements of the AGF method, the strength of frozen walls is expected to play a crucial role in engineering stability. To improve the accuracy of quantitative evaluations of engineering stability, it is necessary to grasp the strength characteristics of frozen rock during service. To achieve this, the red sandstone taken from a frozen shaft project was tested via triaxial compression at different temperatures (−5°C,−10°C,−15°C,−20°C,−25°C, and −30°C). After that, a damage constitutive model with a Weibull distribution was derived to characterize the damage development of the frozen sandstone. Based on the validated model, the variation of damage degree was analyzed. The results show that the crack initiation stress, crack dilation stress, and peak strength all increase with decreasing temperature. The crack damage threshold increases as the frozen sandstone strength increases. The presented damage constitutive model can reflect the damage evolution of frozen sandstone. When the stress exceeds the crack initiation stress, the damage degree begins to increase, and it increases quickly when the stress approaches the peak strength. The model parameters can reflect the influence of negative temperatures on the strength of frozen sandstone. The crack damage threshold could be treated as an essential intrinsic property for predicting the failure process of frozen sandstones. The results can provide an important reference for the design and construction of frozen ground engineering.

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Availability of data and materials

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors would like to thank the coal mine for providing the red sandstone samples.

Funding

(1) The Second Tibetan Plateau Scientific Expedition and Research (STEP) program (No. 2019QZKK0905); (2) the Key Research Program of the Chinese Academy of Sciences (No. ZDRW-ZS-2020–1); (3) the Youth Innovation Promotion Association CAS (Feng Ming).

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Contributions

Feng Ming: conceptualization, investigation, funding acquisition, formal analysis, data curation, writing—original draft preparation. Shujuan Zhang: resources, methodology, investigation, writing—original draft preparation. Fujun Niu: supervision, methodology, funding acquisition, writing—reviewing and editing. Zhiwei Zhou: writing—reviewing and editing.

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Correspondence to Feng Ming or Shujuan Zhang.

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The authors declare no competing interests.

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Ming, F., Zhang, S., Niu, F. et al. A study on crack damage stress and the damage constitutive model of frozen sandstone. Bull Eng Geol Environ 80, 6955–6970 (2021). https://doi.org/10.1007/s10064-021-02361-9

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  • DOI: https://doi.org/10.1007/s10064-021-02361-9

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