层状砂岩各向异性力学特性试验研究

doi:10.13722/j.cnki.jrme.2017.1205

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (688 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要岩体的各向异性力学特性对工程安全稳定具有至关重要的影响。针对工程中常见的层状砂岩，设计进行0°，15°，30°，45°，60°，75°和90°等7种层理角度的单轴和三轴压缩试验，详细分析层理角度对岩体力学特性和破坏模式的影响。研究结果表明：(1) 不同层理角度岩样的应力–应变曲线形态基本一致，均包括压密阶段、弹性阶段、屈服阶段和破坏阶段，随着层理角度的增加，应力–应变曲线的压密阶段逐渐变短；(2) 在单轴和三轴压缩状态下，层状砂岩各向异性特性明显，层理角度从0°增大到90°，弹性模量逐渐增大，而变形模量、抗压强度、黏聚力和摩擦角先减小后增大，呈U型分布，在0°或90°时达到最大值，60°左右时达到最小值；(3) 随着围压的增大，其对层理弱面开裂滑动的限制作用逐渐增强，层理弱面对岩样的破坏模式影响效应逐渐减弱，不同层理角度岩样的力学参数差别逐渐减小，岩样的各向异性特性逐渐减弱；(4) 层状砂岩的破坏模式与层理角度和围压的关系密切，可以归纳为3种类型：劈裂张拉破坏、顺层理弱面的剪切滑移破坏、局部顺层理弱面和局部穿越基质、层理弱面的复合剪切破坏。研究结论可为层状砂岩相关的工程变形稳定分析提供参考。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	邓华锋
	王伟
	李建林
	张吟钗
	张小景

关键词 ：岩石力学, 层状砂岩, 层理弱面, 各向异性, 力学特性, 破坏模式

Abstract：The anisotropic characteristics of rock mass affect crucially the engineering stability and safety. The uniaxial and triaxial compression tests on 7 kinds of bedding angles(0°，15°，30°，45°，60°，75°，90°) were designed according to the common bedding sandstone in engineering. The results show that the stress-strain curves under different kinds of bedding angles have basically the same shape with a compaction stage，an elastic stage，a yielding stage and a failure stage. The compression stage of the stress-strain curve becomes shorter with the increasing of the bedding angle. Significant anisotropy of the bedding sandstone is observed under the uniaxial and triaxial compression tests. The elastic modulus increases gradually but some mechanical parameters，such as the deformation modulus，compressive strength，cohesion and friction angle，decrease firstly and then increase to exhibit a U-shaped curve as the bedding angle varies from 0° to 90°，and reach the maximum value at 0° or 90°，the minimum value at about 60°. With the increasing of confining pressure，both the difference of mechanical parameters between different bedding angles and the anisotropic characteristics of bedding rock sample decrease gradually. The limitation of confining pressure to the crack and slip of weak bedding face gradually increased，but the effect of weak bedding face to the failure modes of rock sample weakened gradually. The failure modes of bedding sandstone are closely related to the bedding angles and confining pressures，which can be summed up in three types：tensile splitting，shearing slip damage along the weak bedding face，compound shear failure across and along the weak bedding face.

Key words： rock mechanics bedding sandstone weak bedding face anisotropy mechanical characteristics failure modes

引用本文:

邓华锋，王伟，李建林，张吟钗，张小景. 层状砂岩各向异性力学特性试验研究[J]. 岩石力学与工程学报, 2018, 37(1): 112-120.
DENG Huafeng，WANG Wei，LI Jianlin，ZHANG Yinchai，ZHANG Xiaojing. Experimental study on anisotropic characteristics of bedded sandstone. , 2018, 37(1): 112-120.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.1205 或 http://www.rockmech.org/CN/Y2018/V37/I1/112

[3]	赵文瑞. 泥质粉砂岩各向异性强度特征[J]. 岩土工程学报，1984，6(1)：32-36.(ZHAO Wenrui. Strength properties of anisotropic rock of an argillaceous siltstone[J] Chinese Journal of Geotechnical Engineering，1984，6(1)：32-36.(in Chinese))
[18]	刘胜利，陈善雄，余飞，等. 绿泥石片岩各向异性特性研究[J]. 岩土力学，2012，33(12)：3 616-3 623.(LIU Shengli，CHEN Shanxiong，YU Fei，et al. Anisotropic properties study of chlorite schist[J]. Rock and Soil Mechanics，2012，33(12)：3 616-3 623.(in Chinese))
[1]	席道瑛，陈林，张涛. 砂岩的变形各向异性[J]. 岩石力学与工程学报，1995，14(l)：49-58.(XI Daoying，CHEN Lin，ZHANG Tao. Deformation anisotropy of sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，1995，14(l)：49-58.(in Chinese))
[21]	SINGH J，RAMAMURTHY T，RAO G V. Strength anisotropies in rocks[J]. Indian Geotechnical Journal，1989，19(2)：147-166.
[4]	曾纪全，邵小曼，胡卸文. 岩体力学各向异性试验[J]. 水电工程研究，2001，(2)：8-21.(ZENG Jiquan，SHAO Xiaoman，HU Xiewen. Anisotropy test of rock mechanics[J]. Hydropower Engineering Research，2001，(2)：8-21.(in Chinese))
[6]	TAVALLALI A，VERVOORT A. Failure of layered sandstone under brazilian test conditions：effect of micro-scale parameters on macro-scale behaviour[J]. Rock Mechanics and Rock Engineering，2010，43(5)：641-653.
[8]	NIANDOU H，SHAO J F，HENRY J P，et al. Laboratory investigation of the mechanical behaviour of Tournemire shale[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(1)：3-16.(in Chinese))
[11]	陈天宇，冯夏庭，张希巍，等. 黑色页岩力学特性及各向异性特性试验研究[J]. 岩石力学与工程学报，2014，33(9)：1 772-1 779. CHEN Tianyu，FENG Xiating，ZHANG Xiwei，et al. Experimental study on echanical and anisotropic properties of black shale[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)： 1 772-1 779.(in Chinese))
[13]	李国权，闫长斌，齐菊梅，等. 南水北调西线工程板岩强度的各向异性特征[J]. 工程地质学报，2011，19(6)：917-921.(LI Guoquan，YAN Changbin，QI Jumei，et al. Anisotropy of slate strength in west route of South-to-North Water Transfer project[J]. Journal of Engineering Geology，2011，19(6)：917-921.(in Chinese))
[7]	邓华锋，张小景，张恒宾，等. 巴西劈裂法在层状岩体抗拉强度测试中的分析与讨论[J]. 岩土力学，2016，37(增2)：309-315.(DENG Huafeng，ZHANG Xiaojing，ZHANG Hengbin，et al. Analysis and discussion on Brazilian tests on layered rock tensile strength[J]. Rock and Soil Mechanics，2016，37(Supp.2)：309-315.(in Chinese))
[17]	CHO J W，KIM H，JEON S，et al. Deformation and strength anisotropy of Asan gneiss，Boryeong shale，and Yeoncheon schist[J]. International Journal of Rock Mechanics and Mining Sciences，2012，50(2)：158-169.
[2]	高春玉，徐进，李忠洪，等. 雪峰山隧道砂板岩各向异性力学特性的试验研究[J]. 岩土力学，2011，32(5)：1 360-1 364.(GAO Chunyu，XU Jin，LI Zhonghong，et al. Experimental study of anisotropically mechanical characteristics of sandy slate in Xuefeng mountain tunnel[J]. Rock and Soil Mechanics，2011，32(5)：1 360-1 364.(in Chinese))
[5]	TAVALLALI A，VERVOORT A. Effect of layer orientation on the failure of layered sandstone under Brazilian test conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2010，47(2)：313-322.
[12]	张永泽，刘俊新，冒海军，等. 单轴压缩下页岩力学特性的各向异性试验研究[J]. 金属矿山，2015，(12)：33-37.(ZHANG Yongze，LIU Junxin，MAO Haijun，et al. Anisotropic experimental study on mechanical properties of shale under uniaxial compression[J]. Metal Mine，2015，(12)：33-37.(in Chinese))
[15]	王聪聪，李江腾，林杭，等. 板岩单轴压缩各向异性力学特征[J]. 中南大学学报：自然科学版，2016，(11)：3 759-3 764.(WANG Congcong，LI Jiangteng，LIN Hang，et al. Anisotropic mechanical characteristics of slate in uniaxial compression[J]. Journal of Central South University：Science and Technology，2016，(11)：3 759-3 764. (in Chinese))
[9]	衡帅，杨春和，张保平，等. 页岩各向异性特征的试验研究[J]. 岩土力学，2015，36(3)：609-616.(HENG Shuai，YANG Chunhe，ZHANG Baoping，et al. Experimental research on anisotropic properties of shale[J]. Rock and Soil Mechanics，2015，36(3)：609-616.(in Chinese))
[14]	冒海军，杨春和. 结构面对板岩力学特性影响研究[J]. 岩石力学与工程学报，2005，24(20)：3 651-3 656.(MAO Haijun，YANG Chunhe. Study on effects of discontinuities on mechanical characters of slate[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(20)：3 651-3 656.(in Chinese))
[16]	刘运思，傅鹤林，饶军应，等. 不同层理方位影响下板岩各向异性巴西圆盘劈裂试验研究[J]. 岩石力学与工程学报，2012，31(4)： 785-791.(LIU Yunsi，FU Helin，RAO Junying，et al. Research on Brazilian disc splitting tests for anisotropy of slate under influence of different bedding orientations[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(4)：785-791.(in Chinese))
[19]	中华人民共和国行业标准编写组. SL264—2001水利水电工程岩石试验规程[S]. 北京：中国水利水电出版社，2001.(The Professional Standards Compilation Group of People?s Republic of China. SL264—2001 Specifications for rock tests in water conservancy and hydroelectric engineering[S]. Beijing：China Water Power Press，2001.(in Chinese))
[10]	KUILA U，DEWHURST D N，SIGGINS A F，et al. Stress anisotropy and velocity anisotropy in low porosity shale[J]. Tectonophysics，2011，503(1/2)：34-44.
[20]	邓华锋，李建林，邓成进，等. 岩石力学试验中试样选择和抗压强度预测方法研究[J]. 岩土力学，2011，32(11)：3 399-3 403.(DENG Huafeng，LI Jianlin，DENG Chengjin，et al. Analysis of sampling in rock mechanics test and compressive strength prediction methods[J]. Rock and Soil Mechanics，2011，32(11)：3 399-3 403.(in Chinese))