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| Preparation method of hollow cylindrical sample of inclined sedimentary sand |
| DONG Tong1,2,LIU Chao3,FANG Yuyu1,WANG Yuhao1,AN Yongning4 |
| (1. Institute of Defense Engineering,Academy of Military Sciences,Beijing 100850,China;2. State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,Army Engineering University of PLA,Nanjing,Jiangsu 210007,China;
3. School of Sciences,Qingdao Technological University,Qingdao,Shandong 266033,China;4. College of Environmental Science and Engineering,Ocean University of China,Qingdao,Shandong 266100,China) |
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Abstract 受现有土工试验仪器功能的限制,目前仅能实现绕单一应力主轴旋转的应力路径,对应力绕2个及以上应力主轴旋转的研究仍是土力学的空白。从控制试样沉积面旋转和控制应力加载方向2个角度,系统梳理应力方向依赖性的试验研究方法。设计研发倾斜沉积砂土空心圆柱试样的制样装置,在砂雨法制备空心圆柱试样技术的基础上,通过控制电机转速使成样模具整体定速转动,使得砂土颗粒在重力和离心力的作用下沿径向倾斜沉积,进而制得沉积面与水平面夹角为定值的倾斜沉积砂土空心圆柱试样,实现试样沉积面绕 的定向旋转。再借助扭剪仪控制应力绕 旋转,即可实现对应力的3个大小量和2个方向量的定量控制。采用生石灰–彩砂试制18个沉积面倾斜的试样,对沉积面倾角进行图像分析和统计学分析,结果表明,所制试样的沉积面倾角与理论计算值较为接近,倾角偏差的分布较符合正态分布,倾斜沉积砂土空心圆柱试样制样装置的制样可靠度较高,为进一步揭示岩土材料特殊的力学性质、丰富和完善土力学理论奠定了技术基础。
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| [1] 孙训芳,方孝淑,关来泰. 材料力学(I)[M]. 北京:高等教育出版社,2002:3–5.(SUN Xunfang,FANG Xiaoshu,GUAN laitai. Mechanics of Materials[M]. Beijing:Higher Education Press,2002:3–5.(in Chinese))
[2] 赵明华. 土力学与基础工程[M]. 武汉:武汉理工大学出版社,2000:4.(ZHAO Minghua. Soil mechanics and foundation engineering[M]. Wuhan:Wuhan University of Technology Press,2000:4.(in Chinese))
[3] 姚仰平,孔玉侠. 横观各向同性土强度与破坏准则的研究[J]. 水利学报,2012,42(1):43–50.(YAO Yangping,KONG Yuxia. Study on strength and failure criterion of cross-anisotropic soil[J]. Journal of Hydraulic Engineering,2012,42(1):43–50.(in Chinese))
[4] 陈立平. 基于细观统计的各向异性砂土摩擦特性与破坏机制研究[J]. 岩石力学与工程学报,2014,33(增1):3 291–3 298.(CHEN Liping. Study on friction characteristics and failure mechanism of anisotropic sand based on meso-statistics[J]. Chinese Journal of Rock Mechanics and Engineering,2014,33(Supp.1):3 291–3 298.(in Chinese))
[5] 郑颖人,孔 亮. 岩土塑性力学[M]. 北京:中国建筑工业出版社,2010:14–16.(ZHENG Yingren,KONG Liang. Geotechnical plastic mechanics[M]. Beijing:China Architecture Industry Press,2010:14–16.(in Chinese))
[6] 赵成刚,白 冰,王运霞. 土力学原理[M]. 北京:清华大学出版社,2004:180–195.(ZHAO Chenggang,BAI Bing,WANG Yunxia. Principles of soil mechanics[M]. Beijing:Tsinghua University Press,2004:180–195.(in Chinese))
[7] 谢定义,陈存礼,胡再强. 试验土工学[M]. 北京:高等教育出版社,2011:135–175.(XIE Dingyi,CHEN Cunli,HU Zaiqiang. Geotechnical test[M]. Beijing:Higher Education Press,2011:135–175.(in Chinese))
[8] 董 彤,郑颖人,孔 亮,等. 考虑主应力轴方向的土体各向异性强度准则与滑动面研究[J]. 岩土工程学报,2018,40(4):736–742. (DONG Tong,ZHENG Yingren,KONG Liang,et al. Mechanical mechanism of the non-coaxiality of geomaterials[J]. Chinese Journal of Geotechnical Engineering,2018,40(4):736–742.(in Chinese))
[9] ODA M,KOISHIKAWA I,HIGUCHI T. Experimental study of anisotropic shear strength of sand by plane strain test[J]. Soils and Foundations,1978,18(1):25–38.
[10] GUO P. Modified direct shear test for anisotropic strength of sand[J]. Journal of Geotechnical and Geoenvironmental Engineering,2008,134(9):1 311–1 318.
[11] HIGHT D W,SYMES M J,GENS A. The development of a new hollow cylinder apparatus for investigating the effects of principal stress rotation in soils[J]. Geotechnique,1983,33(4):355–383.
[12] 沈 扬,梁 晖,葛华阳,等. 主应力轴变化下各向异性钙质砂的定轴剪切特性[J]. 岩土工程学报,2020,42(增1):22–26.(SHEN Yang,LIANG Hui,GE Huayang,et al. Fixed-axis shear characteristics of anisotropic calcareous sand under variation of principal stress axes[J]. Chinese Journal of Geotechnical Engineering,2020,42(Supp.1):22–26.(in Chinese))
[13] 董 彤,孔 亮,郑颖人,等. 颗粒材料的组构–应力关系与等效应力法[J]. 岩石力学与工程学报,2018,37(7):1 741–1 747.(DONG Tong,KONG Laing,ZHENG Yingren,et al. The fabric-stress relationship and the equivalent stress method of granular materials[J]. Chinese Journal of Rock Mechanics and Engineering,2018,37(7):1 741– 1 747.(in Chinese))
[14] 中华人民共和国国家标准编写组. GB/T 50123—2019土工试验方法标准[S]. 北京:中国计划出版社,2019.(The National Standards Compilation Group of People?s Republic of China. GB/T 50123—2019 Standard for geotechnical test methods[S]. Beijing:China Planning Press,2019.(in Chinese))
[15] 马险峰,孔令刚,方 薇,等. 砂雨法试样制备平行试验研究[J]. 岩土工程学报,2014,36(10):1 791–1 801.(MA Xianfeng,KONG Linggang,FANG Wei,et al. Parallel tests on preparation of samples with sand pourer[J]. Chinese Journal of Geotechnical Engineering,2014,36(10):1 791–1 801.(in Chinese))
[16] 邓华锋,王 伟,李建林,等. 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,et al. Experimental study on anisotropic characteristics of bedded sandstone[J]. Chinese Journal of Rock Mechanics and Engineering,2018,37(1):112–120.(in Chinese))
[17] 刘奉银,俞茂宏,殷建华,等. 双剪统一强度研究的扭剪试验应力路径与控制[J]. 岩石力学与工程学报,2005,24(14):2 463–2 467. (LIU Fengyin,YU Maohong,YIN Jianhua,et al. Stress control in hollow cylindrical torsional specimen for study of double shear unified strength[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2 463–2 467.(in Chinese))
[18] 沈 扬,周 建,龚晓南. 空心圆柱仪(HCA)模拟恒定围压下主应力轴循环旋转应力路径能力分析[J]. 岩土工程学报,2006,28(3):281–287.(SHEN Yang,ZHOU Jian,GONG Xiaonan. Analysis on ability of HCA to imitate cyclic principal stress rotation under constant confining pressure[J]. Chinese Journal of Geotechnical Engineering,2006,28(3):281–287.(in Chinese))
[19] 董 彤,郑颖人,孔 亮,等. 空心圆柱扭剪试验中广义应力路径的控制与实现[J]. 岩土工程学报,2017,39(增1):106–110.(DONG Tong,ZHENG Yingren,KONG Liang,et al. Control and realization of generalized stress paths in HCA test[J]. Chinese Journal of Geotechnical Engineering,2017,39(Supp.1):106–110.(in Chinese))
[20] 董 彤,孔 亮,马 云,等. 一种倾斜砂土空心圆柱试样制备装置[P]. 中国:ZL2018200719901,2018.01.16.(DONG Tong,KONG Liang,MA Yun,et al. Sample preparation device for inclined sand hollow cylinder sample[P]. Chinese:ZL2018200719901,2018.01.16.(in Chinese))
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