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The soil-rock mixture with different gradation exhibits different deformation characteristics under load,which affects the project stability. Therefore, to study the mechanical properties of soil-rock mixtures with different rock contents. The samples of soil-rock mixture with the stone content of 20%, 40%, 60% and 80% are prepared. The laboratory shear test is carried out under the vertical stress of 100 kPa, 200 kPa and 300 kPa with an improved large indoor shear rheological testing machine. The test results show that the shear strength of soil-rock mixture increases with the increase of stone content. When the stone content exceeds 40%, the increase is more obvious; under the same vertical stress, the shear dilatancy of the soil-rock mixture become more obvious with the increase of the stone content; and with the increase of the vertical stress, the shear contraction and expansion is identified at the initial stage of shearing. When the stone content is smaller, the shear contraction is more obvious.
[1]唐建一，徐东升，刘华北.含石量对土石混合体剪切特性的影响[J].岩土力学，2018, 39(1):93-102.
[2]胡峰，李志清，胡瑞林，等.基于大型直剪试验的土石混合体剪切带变形特征试验研究[J].岩石力学与工程学报，2018, 37(3):766-778.
[3]刘忠强，薛亚东，黄宏伟，等.崩积体剪切性能试验研究[J].岩土力学，2012, 33(8):2349-2358.
[4] KUENZA K, TOWHATA I, ORENSE R P, et al. Undrained torsional shear tests on gravelly soils[J]. Landslides, 2004, 1(3):185-194.
[5] SIMONI A, HOULSBY G T. The direct shear strength and dilatancy of sand-gravel mixtures[J]. Geotechnical and Geological Engineering, 2006, 24(3):523-549.
[6]杨继红，董金玉，黄志全，等.不同含石量条件下堆积体抗剪强度特性的大型直剪试验研究[J].岩土工程学报，2016, 38(Sup2):161-166.
[7] XU W J, XU Q, HU R L. Study on the shear strength of soil-rock mixture by large scale direct shear test[J]. International Journal of Rock Mechanics and Mining Sciences,2011, 48(8):1235-1247.
[8]王江营，曹文贵，蒋中明，等.不同应力路径下土石混填体变形力学特性大型三轴试验研究[J].岩土力学，2016,37(2):424-430.
[9]高玮，胡瑞林.基质胶结对土石混合体强度变形特性影响[J].吉林大学学报（地球科学版），2015, 45(4):1164-1172.
[10]薛亚东，岳磊，李硕标.含水率对土石混合体力学特性影响的试验研究[J].工程地质学报，2015, 23(1):21-29.
[11]赵明华，刘建军，罗宏，等.土石混填体抗剪强度特性及影响因素的试验研究[J].岩土力学，2017, 38(4):965-972.
[12]王宇，李晓，李守定，等.单轴压缩条件下土石混合体开裂特征研究[J].岩石力学与工程学报，2015, 34(Sup1):3541-3552.
[13]李晓，廖秋林，赫建明，等.土石混合体力学特性的原位试验研究[J].岩石力学与工程学报，2007, 26(12):2377-2384.
[14]油新华，汤劲松.土石混合体野外水平推剪试验研究[J].岩石力学与工程学报，2002, 21(10):1537-1540.
[15]徐文杰，胡瑞林，谭儒蛟，等.虎跳峡龙蟠右岸土石混合体野外试验研究[J].岩石力学与工程学报，2006, 25(6):1270-1277.
[16]金磊，曾亚武.土石混合体宏细观力学特性和变形破坏机制的三维离散元精细模拟[J].岩石力学与工程学报，2018, 37(6):1540-1550.
[17]张强，汪小刚，赵宇飞，等.土石混合体三维细观结构随机重构及其力学特性颗粒流数值模拟研究[J].岩土工程学报，2019, 41(1):60-69.
[18] SONMEZ H, GOKCEOGLU C, MEDLEY E W, et al. Estimating the uniaxial compressive strength of a volcanic bimrock[J]. International Journal of Rock Mechanics and Mining Sciences, 2006, 43(4):554-561.
Basic Information:
DOI：10.12194/j.ntu.20190903001
China Classification Code:TU43
Citation Information:
[1]YU Jun,SUN Honghao,ZHENG Xiaoyang.Effect of Stone Content on Shear Mechanical Properties of Soil-Rock Mixture[J].Journal of Nantong University (Natural Science Edition),2020,19(03):83-89.DOI:10.12194/j.ntu.20190903001.