Abstract
This paper deals with the influence of water content on the mechanical properties of gypsum breccia with different initial water contents. The experimental research was taken on the GDS (geotechnical digital systems) tri-axial experiment system by strain rate control. The mechanical properties, including stress-strain curves, peak deviator stress, relative residual strength, elastic modulus, Poisson’s ratio, angle of internal friction and cohesion of gypsum breccia, were studied by experiment. The results showed that the water content has obvious influence on the mechanical properties of gypsum breccia. With increasing of water content, the angle of internal friction and cohesion of gypsum breccia decrease linearly. Meanwhile, the stress-strain curves go through from the declining, hump curve to the strain hardening curve. At the same confining pressure, the peak deviator stress and elastic modulus decrease exponentially, while Poisson’s ratio increases linearly with the increasing of the water content. At the same water content, with increasing of the confining pressure, the peak deviator stress, elastic modulus and the peak deviator stress increase trend but Poisson’s ratio decreases at a lower water content. While at a high water contents, the Poisson’s ratio doesn’t change much. It shows that water content plays an important role in the process of changing from the brittleness to plastic for the mechanical properties of gypsum breccia.
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References
Hu Wen-shou, Yu Jun-qin. Engineering characteristic study of gypsum breccia [J]. Journal of Chang’an University, 2003, 25(1): 37–41 (in Chinese).
Zhou Cui-ying, Deng Yi-mei. Experimental research on the softening of mechanical properties of saturated soft rocks and application [J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(1): 33–38 (in Chinese).
Hawkins A B. Aspects of rock strength [J]. Bulletin of Engineering Geology and the Environment. 1998, 57(1): 17–30.
Hawkins A B, Mcconnell B J. Sensitivity of sandstone strength and deformability to changes in moisture content [J]. Quarterly Journal of Engineering Geology and Hydrogenology, 1992, 25(2): 115–130.
Vásárhelyi B. Some observations regarding the strength and deformability of sandstones in case of dry and saturated conditions [J]. Bulletin of Engineering Geology and the Environment, 2003, 62(3): 245–249.
Ojo O. The effect of moisture on some mechanical properties of rock [J]. Mining Science and Technology, 1990, 10(2): 145–157.
Laijtai E Z, Schmidtke R H, Bielus L P. The effect of water on the time-dependent deformation and fracture of a granite [J]. International Journal of Rock Mechanics and Mining Sciences, 1987, 24(4): 247–255.
Vásárhelyi B, Ván P. Influence of water content on the strength of rock [J]. Engineering Geology, 2006, 84(1–2): 70–74.
Chen Yue-qi. Tunnel wall rock mechanics features in different water-evolved tests [J]. Shanxi Architecture, 2007, 33(5): 91–92 (in Chinese).
Tang Xing-hua, Zhao Zhi-xiang. On relation between different water contents and mechanical properties of neogene red stratum [J]. Northwest Water Power, 2005, 4: 16–19 (in Chinese).
Colback P S B, Wild B L. Influence of moisture content on the compress strength of rock [C]//Proceedings of the 3rd Canadian Rock Mechanics Symposium. Toronto: Society of Exploration Geophysicists, 1965: 385–391.
Kang Hong-pu. Rock damage for water [J]. Hydrogeology and Engineering Geology, 1994, 21(3): 39–41 (in Chinese).
Talesnick M, Shehadeh S. The effect of water content on the mechanical response of a high-porosity chalk [J]. International Journal of Rock Mechanics and Mining Sciences, 2007, 44(4): 584–600.
Koncagul E C, Santi P M. Predicting the unconfined compressive strength of the Breathitt shale using slake durability, shore hardness and rock structural properties [J]. International Journal of Rock Mechanics and Mining Sciences, 1999, 36(2): 139–153.
Hsu S C, Nelson P P. Characterization of eagle ford shale [J]. Engineering Geology, 2002, 67(1–2): 169–183.
Lashkaripour G. Predicting mechanical properties of mudrock from index parameters [J]. Bulletin of Engineering Geology and the Environment, 2002, 61(1): 73–77.
Wu Yan-qing, Zhang Zuo-yuan. An introduction to rock mass hydraulics [M]. Chengdu: South-West Jiaotong University Press, 1995: 45–65 (in Chinese).
Nguych T S, Bogesson L, Chijimatsu M, et al. Hydro-mechanical response of a fractured granitic rock mass to excavation of a test pit-the Karnaishi Mine experiment in Japan [J]. International Journal of Rock Mechanics and Mining Sciences 2001, 38(1): 79–94.
Rejed B D. Hydro-mechanical effects of shaft sinking at the Sella fields sites [J]. International Journal of rock mechanics and mine science, 2001, 38(1): 17–29.
Indratna P G, Ranjjth G W. Single phase water flow through rock fractures [J]. Geotechnical and Geological Engineering, 2004, 17(3–4): 211–240.
Wang En-zhi. Network analysis and seepage flow model of fractured rockmass [J]. China Journal of Rock Mechanic and Engineering, 1993, 12(3): 214–221 (in Chinese).
Yao Hai-lin, Yang Yang, Cheng Ping, et al. Standard moisture absorption water content of soil and its testing standard [J]. Rock and Soil Mechanics, 2004, 25(6): 856–859 (in Chinese).
Tan Luo-rong, Kong Ling-wei. Chaotic control and its application in optimization [M]. Beijing: Science Press, 2006: 1–30 (in Chinese).
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Deng, Jh., Huang, Xc. & Li, Yj. Experimental research on the mechanical properties of gypsum breccia with different water content. J. Shanghai Jiaotong Univ. (Sci.) 15, 250–256 (2010). https://doi.org/10.1007/s12204-010-8062-5
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DOI: https://doi.org/10.1007/s12204-010-8062-5