Experimental Study on Mechanical Properties of Soaked Shale

JIN Cheng; WANG Fang; SHI Chong

doi:10.11988/ckyyb.20160572

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Journal of Changjiang River Scientific Research Institute ›› 2017, Vol. 34 ›› Issue (9) : 122-126. DOI: 10.11988/ckyyb.20160572

ROCK SOIL ENGINEERING

Experimental Study on Mechanical Properties of Soaked Shale

JIN Cheng ^1,2, WANG Fang^1,2, SHI Chong^1,2

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Abstract

The mechanical properties of shale vary after being soaked and softened in water. In view of this, triaxial compression tests were conducted on shale soaked in water for different durations. The relationship between stress and strain of soaked shale was revealed, and the variation regularity of mechanics parameters of shale was obtained under the action of water deterioration. Results indicate that the strength and elastic modulus of soaked shale specimens reduced greatly with the increase of soaking duration. Water soaking had small influence on frictional angle of soaked shale, but significant impact on cohesion. In addition, as the softening effect became increasingly significant, the failure mode of shale specimens gradually changed from brittle tensile splitting failure to a mixed failure form of tension and shear. The strength reduced and ductility increased when softening action became increasingly significant. Soaking duration has significant impact on strength, deformation and failure mode. The results offer reference for determining geotechnical parameters or mechanical analysis of shale.

Key words

shale / softening action / soaking time / triaxial compression test / mechanical characteristics / stress-strain curve

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JIN Cheng , WANG Fang, SHI Chong. Experimental Study on Mechanical Properties of Soaked Shale[J]. Journal of Changjiang River Scientific Research Institute. 2017, 34(9): 122-126 https://doi.org/10.11988/ckyyb.20160572

References

[1] 刘新荣,傅晏,郑颖人,等. 水岩相互作用对岩石劣化的影响研究[J] . 地下空间与工程学报, 2012, 8(1): 77-82.
[2] 刘新荣 , 傅晏 , 王永新 ,等. 水-岩作用下砂岩抗剪强度劣化规律的试验研究[J] . 岩土工程学报, 2008 , 30 (9) :1298-1302.
[3] 陈钢林,周仁德. 水对受力岩石变形破坏宏观力学效应的实验研究[J] . 地球物理学报,1991, 34(3):335-342.
[4] 王伟, 刘桃根, 吕军, 等. 水岩化学作用对砂岩力学特性影响的试验研究[J] . 岩石力学与工程学报, 2012,31(增2):3607-3617.
[5] 丁梧秀, 陈建平, 徐桃, 等. 化学溶液侵蚀下灰岩的力学及化学溶解特性研究[J] . 岩土力学, 2015, 36(7): 1825－1830.
[6] 丁梧秀, 徐桃, 王鸿毅, 等. 水化学溶液及冻融耦合作用下灰岩力学特性试验研究[J] . 岩石力学与工程学报 , 2015 , 34 (5) :979-985.
[7] 邓华锋, 李建林, 朱敏, 等. 饱水-风干循环作用下砂岩强度劣化规律试验研究[J] . 岩土力学学报, 2012, 33(11): 3306-3312.
[8] 邓华锋, 肖志勇, 李建林, 等. 水岩作用下损伤砂岩强度劣化规律试验研究[J] . 岩石力学与工程学报, 2015, (增1):2690-2698.
[9] 邓华锋, 罗骞, 李建林, 等. 浸泡-风干循环作用下砂岩动力特性劣化规律研究[J] . 岩土力学, 2013, 34(9): 2468-2474.
[10] 邓华锋, 胡安龙, 李建林, 等. 水岩作用下砂岩劣化损伤统计本构模型[J] . 岩土力学, 2017, 38(3): 631-639.
[11] 周翠英,邓毅梅,谭祥韶,等. 饱水软岩力学性质软化的试验研究与应用[J] . 岩石力学与工程学报,2005, 24(1) : 33-38.
[12] 周翠英, 谭祥韶, 邓毅梅, 等. 特殊软岩软化的微观机制研究[J] . 岩石力学与工程学报, 2005, 24(3): 394-400.
[13] 刘建,乔丽苹,李鹏. 砂岩弹塑性力学特性的水物理化学作用效应-试验研究与本构模型[J] . 岩石力学与工程学报, 2009, 28(1):20-29.
[14] 刘建, 李鹏, 乔丽苹, 等. 砂岩蠕变特性的水物理化学作用效应试验研究[J] . 岩石力学与工程学报, 2008, 27(12): 2540-2550.
[15] 李铀, 朱维申, 白世伟, 等. 风干与饱水状态下花岗岩单轴流变特性试验研究[J] . 岩石力学与工程学报, 2003, 22(10): 1673-1673.