不同应力路径下灰砂岩力学特性与强度参数研究

doi:10.13722/j.cnki.jrme.2018.1222

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摘要基于常规岩石力学试验设备与自行研制的岩石空心圆柱扭剪试验系统，开展灰砂岩直剪试验、常规三轴压缩试验与空心圆柱三轴压缩(内外压相等与内外压不等)试验，研究不同应力路径下岩石的力学特性和强度参数。通过比较常规三轴压缩试验与空心圆柱三轴压缩(内外压相等)试验结果，验证了岩石空心圆柱扭剪试验系统以及采用空心圆柱试样进行试验的可行性，内外压不等的空心圆柱三轴压缩试验可以反映中间主应力对强度参数的影响。通过比较不同类型试验获取的灰砂岩强度参数，认为按D-P准则整理的岩石空心圆柱三轴压缩(内外压不等)试验数据，获取的强度参数能合理地反映应力状态和应力路径的影响。

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	姜玥1
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	周辉1
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	卢景景1
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	张传庆1
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	高阳1
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	陈珺1
	2

关键词 ：岩石力学, 空心圆柱试样, 复杂应力状态, 三轴试验, 强度参数

Abstract：To investigate mechanical properties and strength parameters of gray sandstone in complex stress state，direct shear test，conventional triaxial compression test and hollow cylindrical triaxial compression test(coupled inner and outer confining pressures) were carried out by the conventional rock mechanics test equipment and self-developed hollow cylinder torsional apparatus for rock. By comparing the test results of conventional and hollow cylindrical triaxial compression(equal inner and outer confining pressures) tests，the test ability of the hollow cylinder torsional apparatus for rock and the feasibility of hollow cylindrical specimen were verified. It is shown that the hollow cylindrical triaxial compression test(different inner and outer confining pressures) can reflect the influence of the intermediate principal stress on strength parameters. Comparisons of the strength parameters of gray sandstone obtained by different types of experiments were performed，and it is revealed that the strength parameters calculated by the test data of hollow cylindrical triaxial compression test(coupled inner and outer confining pressure) based on D-P criterion can better reflect the influence of the stress state and stress path.

Key words： rock mechanics')" href="#">

rock mechanics hollow cylindrical specimen complex stress state triaxial test ')" href="#">strength parameters

引用本文:

姜玥1，2，周辉1，2，卢景景1，2，张传庆1，2，高阳1，2，陈珺1，2. 不同应力路径下灰砂岩力学特性与强度参数研究[J]. 岩石力学与工程学报, 2019, 38(4): 815-824.
JIANG Yue1，2，ZHOU Hui1，2，LU Jingjing1，2，ZHANG Chuangqing1，2，GAO Yang1，2，CHEN Jun1，2. Study on mechanical properties and strength parameters of gray sandstone under different stress paths. , 2019, 38(4): 815-824.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2018.1222 或 http://www.rockmech.org/CN/Y2019/V38/I4/815

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