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Article

Dynamic Compression Characteristics and Failure Mechanism of Water-Saturated Granite

1
School of Civil Engineering, North China University of Technology, Beijing 100144, China
2
State Key Laboratory of Hydroscience and Hydraulic Engineering, School of Civil Engineering, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
Academic Editor: Akbar Javadi
Water 2022, 14(2), 216; https://doi.org/10.3390/w14020216
Received: 31 October 2021 / Revised: 17 December 2021 / Accepted: 3 January 2022 / Published: 12 January 2022
(This article belongs to the Special Issue Water–Rock/Soil Interaction)
For Fangshan granite in Beijing, the static compression and dynamic compression tests have been carried out separately under natural air drying and water saturation. It was found that the dynamic compressive strength of water-saturated granite is higher than that of air-dried granite, which is contrary to the result that the strength of water-saturated rock is lower than that of air-dried granite under static load. Furthermore, under the medium strain rate condition, when the strain rate is 85 s−1, the dynamic strength of natural air-dried granite could be increased by nearly 0.5 times compared with its static state. The dynamic strength of water-saturated granite could be increased by nearly 1–2 times compared with its static strength, which shows that water-saturated granite has stronger strain rate sensitivity than natural air-dried granite. Meanwhile, under impact loading, from the perspective of water-bearing granite the Bernoulli effect of fluid, the adhesion effect of free water and the Stefan effect of fluid in water-saturated granite were revealed, and found to be the essential reasons affecting the dynamic strength of water-saturated granite. The dynamic strength in different water-bearing states in the range of medium strain rate could then be analyzed in depth, providing a certain reference value for the strength design of water-bearing rock engineering. View Full-Text
Keywords: air dried granite; dynamic compression characteristics; rock dynamics; water effect; water saturated granite air dried granite; dynamic compression characteristics; rock dynamics; water effect; water saturated granite
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MDPI and ACS Style

Man, K.; Liu, X.; Song, Z.; Liu, Z.; Liu, R.; Wu, L.; Cao, Z. Dynamic Compression Characteristics and Failure Mechanism of Water-Saturated Granite. Water 2022, 14, 216. https://doi.org/10.3390/w14020216

AMA Style

Man K, Liu X, Song Z, Liu Z, Liu R, Wu L, Cao Z. Dynamic Compression Characteristics and Failure Mechanism of Water-Saturated Granite. Water. 2022; 14(2):216. https://doi.org/10.3390/w14020216

Chicago/Turabian Style

Man, Ke, Xiaoli Liu, Zhifei Song, Zongxu Liu, Ruilin Liu, Liwen Wu, and Zixiang Cao. 2022. "Dynamic Compression Characteristics and Failure Mechanism of Water-Saturated Granite" Water 14, no. 2: 216. https://doi.org/10.3390/w14020216

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