Abstract
Understanding the effect of impoundment on the creep characteristics of rock mass of reservoir slope is vital to prevent and mitigate reservoir-impoundment-induced landslide hazard. In the present work, the degradation of creep characteristics of mudstones with different initial water contents under different soaking conditions is studied. The results show that in un-soaking conditions the axial instantaneous strain and axial creep strain of mudstone increase with increasing initial water content, while the long-term strength decreases. The soaking condition has a great influence on the creep strain and long-term strength of unsaturated samples but little influence on saturated samples. Moreover, the impacts of water on creep characteristics are mainly related to the water content of the samples during testing. Based on the test results, a creep constitutive model considering water is established and verified to be reasonable. Finally, the proposed model is implemented to simulate the time-dependent deformation of the Majiagou landslide in the Three Gorges Reservoir after impoundment.
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Funding
The work reported in this paper has received financial support from National Natural Science Foundation of China (No.51879127), National Key R&D Program of China (nos.2019YFC0605001), National Key R&D Program of China (No.2018YFC1505005), National Natural Science Foundation of China (No.51769014, 42077253) and Natural Science Foundation of Hubei Province (No. 2016CFA083). These supports are gratefully acknowledged.
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Gao, Y., Wei, W., Hua, D. et al. Study on creep characteristics of mudstone with different initial water contents in soaking conditions and its engineering applications. Bull Eng Geol Environ 81, 380 (2022). https://doi.org/10.1007/s10064-022-02864-z
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DOI: https://doi.org/10.1007/s10064-022-02864-z