基于应变能密度映射的黄土结构性参数研究

doi:10.13722/j.cnki.jrme.2021.0244

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1034 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要岩土体结构的破坏是由于施加能量超过变形能阈值所造成，基于能量的结构性参数更有利于反映结构性的本质特征。对不同含水状态，不同干密度的延安桃花山原状与压实重塑黄土进行了侧限压缩试验，发现孔隙比e与竖向压力P在ln(1+e)-lgP双对数坐标系内有良好的分段线性关系。在此基础上，基于应变能密度理论，推导提出了侧限压缩条件下的结构性参数映射能，并将该参数推广至复杂加载条件。进一步通过多个区域内，原状与重塑，不同含水率，不同干密度，不同埋深深度，不同粒度土体的侧限压缩试验结果，以及不同含水率土体的等向压缩试验结果，对提出结构性参数的合理性进行了验证。结果表明提出的结构性参数映射能物理意义明确，且能准确地定量表征不同状态，不同试验条件下土体的结构性。

	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
	吕龙龙1
	廖红建1
	伏映鹏1
	夏龙飞1
	2
	冷先伦3

关键词 ：土力学, 黄土, 结构性参数, 侧限压缩试验, 应变能密度映射

Abstract：The destruction of natural soils occurs when the external loading energy is greater than the limit deformation energy of the soils，thus，a structure parameter in terms of the deformation energy is more suitable to describe the essential characteristic of soil structure. The confined compression tests were conducted on compacted remolded and undisturbed loess samples with various water contents and dry densities from the Taohua Hill，Yan¢an city. Test results suggest that there is an obvious piecewise linear relationship between the void ratio e and the vertical pressure P in -lgP bi-logarithmic coordinate system. Based on this，a structure parameter in terms of the mapping energy was derived according to the strain energy density theory，and further extended into complex loading conditions. Moreover，the verification of the proposed parameter was carried out based on the oedometer tests on remolded and undisturbed soils with different water contents，dry densities，burial depths and particle size distributions，as well as the isotropic compression tests with various water contents. The results show that the proposed parameter has a clearly physical meaning and is able to represent the soil structure quantitatively and accurately under diverse experimental conditions.

Key words： soil mechanics loess structure parameter confined compression test mapping of strain energy density

引用本文:

吕龙龙1，廖红建1，伏映鹏1，夏龙飞1，2，冷先伦3. 基于应变能密度映射的黄土结构性参数研究[J]. 岩石力学与工程学报, 2022, 41(2): 399-411.
LV Longlong1，LIAO Hongjian1，FU Yingpeng1，XIA Longfei1，2，LENG Xianlun3. Study on structural parameter of loess based on the mapping of the strain energy density#br#. , 2022, 41(2): 399-411.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0244 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I2/399

[6]	YU F. Particle breakage in triaxial shear of a coral sand[J]. Soils and Foundations，2018，58(4)：866-880.
[20]	BUTTER F R. A natural compression law for soils(an advance on e-log p¢)[J]. Geotechnique，1979，29(4)：469-480.
[1]	谢定义. 试论我国黄土力学研究中的若干新趋向[J]. 岩土工程学报，2001，23(1)：3-13.(XIE Dingyi. Exploration of some new tendencies in research of loess soil mechanics[J]. Chinese Journal of Geotechnical Engineering，2001，23(1)：3-13.(in Chinese))
[10]	沈珠江. 岩土破损力学：理想脆弹塑性模型[J]. 岩土工程学报，2003，25(3)：253-257.(SHEN Zhujiang. Breakage mechanics for geological materials: an ideal brittle-elastic-plastic model[J]. Chinese Journal of Geotechnical Engineering，2003，25(3)：253-257.(in Chinese))
[2]	沈珠江. 土体结构性的数学模型——21世纪土力学的核心问题[J]. 岩土工程学报，1996，18(1)：95-97.(SHEN Zhujiang. Soil structural mathematical model—the core issue of soil mechanics in the 21st century[J]. Chinese Journal of Geotechnical Engineering，1996，18(1)：95-97.(in Chinese))
[4]	方祥位，申春妮，汪龙，等. Q2黄土浸水前后微观结构变化研究[J]. 岩土力学，2013，34(5)：1 319-1 324.(FANG Xiangwei，SHEN Chunni，WANG Long，et al. Research on microstructure of Q2 loess before and after wetting[J]. Rock and Soil Mechanics，2013，34(5)：1 319-1 324.(in Chinese))
[9]	DESAI C S. A consistent finite element technique for work softening behavior[C]// Proceeding of International Conference on Computer Methods in Nonlinear Mechanics. Austin：University of Texas，1974：969-978.
[11]	谢定义，齐吉琳. 土结构性及其定量化参数研究的新途径[J]. 岩土工程学报，1999，21(6)：651-656.(XIE Dingyi，QI Jilin. Soil structure characteristics and new approach in research on its quantitative parameter[J]. Chinese Journal of Geotechnical Engineering，1999，21(6)：651-656.(in Chinese))
[13]	冯志焱，谢定义. 复杂加载条件下原状黄土结构性定量化参数变化全过程分析[J]. 西安理工大学学报，2009，25(1)：75-78.(FENG Zhiyan，XIE Dingyi. Quantitative analysis of soil structure variations in whole process under complex loading conditions of intact loess[J]. Journal of Xi¢an University of Technology，2009，25(1)：75-78.(in Chinese))
[15]	邓国华，邵生俊，陈昌禄，等. 一个可考虑球应力和剪应力共同作用的结构性参数[J]. 岩土力学，2012，33(8)：2 310-2 314.(DENG Guohua，SHAO Shengjun，CHEN Changlu，et al. A structural parameter reflecting coupling action between shear stress and spherical stress[J]. Rock and Soil Mechanics，2012，33(8)：2 310-2 314.(in Chinese))
[18]	王娟娟，郝延周，王铁行. 非饱和压实黄土结构特性试验研究[J]. 岩土力学，2019，40(4)：1 351-1 357.(WANG Juanjuan，HAO Yanzhou，WANG Tiehang. Experimental study of structural characteristics of unsaturated compacted loess[J]. Rock and Soil Mechanics，2019，40(4)：1 351-1 357.(in Chinese))
[22]	MU Q Y，ZHOU C，NG C W W. Compression and wetting induced volumetric behavior of loess: micro- and macro-investigations[J]. Transportation Geotechnics，2020，23(100345)：1-8.
[24]	HABIBBEYGI F，NIKRAZ H. The effect of unloading and reloading on the compression behavior of reconstituted clays[J]. International Journal of Geomate，2018，15(51)：53-59.
[27]	WANG H，ZENG L L，DING J W，et al. Settlement of Funing natural clays under 14-year embankment loads：a case study[J]. Advances in Civil Engineering，2019，2019(6)：1-11.
[29]	ASSALLAY A M，ROGERSI C D，SMALLEY F J. Formation and collapse of metastable particle packings and open structures in loess deposits[J]. Engineering Geology，1997，48(1/2)：101-115.
[31]	SUN D A，MATSUOKA H，YAO Y P，et al. A three-dimensional elastoplastic model for unsaturated compacted soil with hydraulic hysteresis[J]. Soils and Foundations，2007，47(2)：253-264.
[3]	江洎洧，项伟，张雪杨. 基于CT扫描和仿真试验研究黄土坡滑坡原状滑带土力学参数[J]. 岩石力学与工程学报，2011，30(5)：1 025-1 033.(JIANG Jiwei，XIANG Wei，ZHANG Xueyang. Research on mechanical parameters of intact sliding zone soils of Huangtupo landslide based on CT scanning and simulation tests[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(5)：1 025-1 033.(in Chinese))
[12]	陈存礼，胡再强，高鹏. 原状黄土的结构性及其与变形特性关系研究[J]. 岩土力学，2006，27(11)：1 891-1 896.(CHEN Cunli，HU Zaiqiang，GAO Peng. Research on relationship between structure and deformation property of intact loess[J]. Rock and Soil Mechanics，2006，27(11)：1 891-1 896.(in Chinese))
[21]	HONG Z S. Void ratio-suction behavior of remolded Ariake clays[J]. Geotechnical Testing Journal，2007，30(3)：234-239.
[30]	穆青翼，党影杰，董琪，等. 原状和压实黄土持水特性及湿陷性对比试验研究[J]. 岩土工程学报，2019，41(8)：1 496-1 504.(MU Qingyi，DANG Yingjie，DONG Qi，et al. Water-retention characteristics and collapsibity behaviors：comparison between intact and compacted loesses[J]. Chinese Journal of Geotechnical Engineering，2019，41(8)：1 496-1 504.(in Chinese))
[7]	KUO C Y，FROST J D，CHAMEAU J L A. Image analysis determination of stereology-based fabric tensors[J]. Geotechnique，1998，48(4)：515-525.
[16]	邵生俊，郑文，王正泓，等. 黄土的构度指标及其试验确定方法[J]. 岩土力学，2010，31(1)：15-19.(SHAO Shengjun，ZHENG Wen，WANG Zhenghong，et al. Structural index of loess and its testing method[J]. Rock and Soil Mechanics，2010，31(1)：15-19.(in Chinese))
[25]	HONG Z S，YIN J，CUI Y J. Compression behavior of reconstituted soils at high initial water contents[J]. Geotechnique，2010，60(9)：691-700.
[33]	简涛，李喜安，王力，等. 颗粒组构对黄土压缩特性及其粒间状态的影响[J]. 科学技术与工程，2018，18(30)：217-224.(JIAN Tao，LI Xian，WANG Li，et al. Influence of particle composition on compressibility and intergranular state of loess[J]. Science Technology and Engineering，2018，18(30)：217-224.(in Chinese))
[34]	张登飞，陈存礼，舒迎涛，等. 原状黄土的结构性与渗气特性的关联性初探[J]. 岩土工程学报，2021，43(7)：1 345-1 351.(ZHANG Dengfei，CHEN Cunli，SHU Yingtao，et al. Correlation between structure of intact loess and gas permeability[J]. Chinese Journal of Geotechnical Engineering，2021，43(7)：1 345-1 351.(in Chinese))
[5]	孙德安，高游，刘文捷，等. 红黏土的土水特性及其孔隙分布[J]. 岩土工程学报，2015，37(2)：351-356.(SUN Dean，GAO You，LIU Wenjie，et al. Soil-water characteristics and pore-size distribution of lateritic clay[J]. Chinese Journal of Geotechnical Engineering，2015，37(2)：351-356.(in Chinese))
[14]	邵生俊，周飞飞，龙吉勇. 原状黄土结构性及其定量化参数研究[J]. 岩土工程学报，2004，26(4)：531-536.(SHAO Shengjun，ZHOU Feifei，LONG Jiyong. Structural properties of loess and its quantitative parameter[J]. Chinese Journal of Geotechnical Engineering，2004，26(4)：531-536.(in Chinese))
[23]	王秋生. 基于超塑性力学的软粘土本构理论研究[博士学位论文][D]. 杭州：浙江大学，2007.(WANG Qiusheng. Research on soft clay's constitutive relations based on hyper-plastic[Ph. D. Thesis][D]. Hangzhou：Zhejiang University，2007.(in Chinese))
[32]	陈存礼，张登飞，张洁，等. 等向应力下原状黄土的压缩及增湿变形特性研究[J]. 岩石力学与工程学报，2017，36(7)：181-192. (CHEN Cunli，ZHANG Dengfei，ZHANG Jie，et al. Compression and wetting deformation behavior of intact loess under isotropic stresses[J]. Chinese Journal of Rock Mechanics and Engineering，，2017，36(7)：181-192.(in Chinese))
[8]	卫振海. 岩土材料结构性问题研究[博士学位论文][D]. 北京：北京交通大学，2012.(WEI Zhenhai. Research on the geomaterials structure[Ph. D. Thesis][D]. Beijing：Beijing Jiaotong University，2012.(in Chinese))
[17]	谢和平，鞠杨，黎立云. 基于能量耗散与释放原理的岩石强度与整体破坏准则[J]. 岩石力学与工程学报，2005，24(17)：3 003-3 010. (XIE Heping，JU Yang，LI Liyun. Criteria for strength and structural failure of rocks based on energy dissipation and energy release principles[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 003-3 010.(in Chinese))
[19]	王丽琴，邵生俊，王帅，等. 原状黄土的压缩曲线特性[J]. 岩土力学，2019，40(3)：1 076-1 084.(WANG Liqin，SHAO Shengjun，WANG Shuai，et al. Compression curve characteristic of undisturbed loess[J]. Rock and Soil Mechanics，2019，40(3)：1 076-1 084.(in Chinese))
[28]	王潇，杨博，谷天峰，等. 甘肃黑方台黄土压缩试验研究[J]. 陕西理工学院学报：自然科学版，2018，34(2)：16-20.(WANG Xiao，YANG Bo，GU Tianfeng，et al. Study of loess compression test in Heifangtai，Gansu[J]. Journal of Shaanxi University of Technology：Natural Science，2018，34(2)：16-20.(in Chinese))
[26]	HONG Z S，ZENG L L，CUI Y J，et al. Compression behavior of natural and reconstituted clays[J]. Geotechnique，2012，62(4)：291-301.