新疆某渠道边坡填料的剪胀特性与变形失稳研究

doi:10.13722/j.cnki.jrme.2017.0339

Abstract
Figure/Table
References (24)
Related Citation (15)

Download: PDF (533 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

The amount and scale of engineering construction in Xinjiang develop greatly in recent years. Engineering practice necessitates that a comprehensive understanding on the reconstituted loess¢s mechanical behavior to provide theoretical support. In this research，laboratory tests were performed using an infilled loess material from a channel slope in Xinjiang，to investigate the dilatancy and instability of the material which are affected by the degree of compaction. Scanning electron microscope technique and CT technique were used firstly to examine the microscopic and mesoscopic compositions firstly. The stress-strain relationship，the dilatancy and the experienced paths were then analyzed under saturated undrained condition，with consideration of three levels of degree of compaction and three stress levels. Thereafter，the results are compared and verified under drained condition. The findings are below. Firstly，the material could demonstrate contraction-dilation-contraction behavior，between the contractive behavior at loose state and the dilative behavior at dense state. Secondly，the material has a unique critical state line in the stress plane，while its critical states are affected by initial void ratio，suggesting a belt region in the compression plane. Third，the slope of instability line increases with the degree of compaction，indicating a higher stress ratio to achieve instability region. Therefore potential instability led by engineering disturbance reduces at a higher degree of compaction.

Key words： soil mechanics dilatancy critical state loess channel slope scanning electron microscope(SEM)

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHOU Yuefeng
	CHENG Zhanlin
	GONG Biwei
	LIU Jun

Cite this article:

ZHOU Yuefeng,CHENG Zhanlin,GONG Biwei, et al. The dilatancy and instability of an infilled material in a channel slope in Xinjiang[J]. , 2018, 37(S2): 4406-4414.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0339 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/4406

[1] 徐张建，林在贯，张茂省. 中国黄土与黄土滑坡[J]. 岩石力学与工程学报，2007，26(7)：1 297–1 312.(XU Zhangjian，LIN Zaiguan，ZHANG Maosheng. Loess in china and loess landslides[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(7)：1 297–1 312. (in Chinese))

[2] ROWE P W. The stress-dilatancy relation for static equilibrium of an assembly of particles in contact[J]. Proceedings of the Royal Society of London，1962，A269：500–527.

[3] LI X S，DAFALIAS Y F. Dilatancy for cohesionless soils[J]. Geotechnique，2000，50(4)：449–460.

[4] 蔡正银，李相菘. 砂土的剪胀理论及其本构模型的发展[J]. 岩土工程学报，2007，29(8)：1 122–1 128.(CAI Zhengyin，LI Xiangsong. Development of dilatancy theory and constitutive model of sand[J]. Chinese Journal of Geotechnical Engineering，2007，29(8)：1 122–1 128.(in Chinese))

[5] XU L，COOP M R，ZHANG M，et al. The mechanics of a saturated silty loess and implications for landslides[J]. Engineering Geology，2017，236(1)：29–42.

[6] ZOU W，LI Y，CHEN L，et al. Mechanical properties of QH-E Lunar soil simulantat low confining stresses[J]. Journal of Aerospace Engineering，2016，29(2)：1–10.

[7] 詹良通，吴宏伟. 吸力对非饱和膨胀土抗剪强度及剪胀特性的影响[J]. 岩土工程学报，2007，29(1)：82–87.(ZHAN Liangtong，NG C W W. Effect of suction on shear strength and dilatancy of an unsaturated expansive clay[J]. Chinese Journal of Geotechnical Engineering，2007，29(1)：82–87.(in Chinese))

[8] 程展林，姜景山，丁红顺，等. 粗粒土非线性剪胀模型研究[J]. 岩土工程学报，2010，32(3)：460–467.(CHENG Zhanlin，JIANG Jingshan，DING Hongshun，et al. Nonlinear dilatancy model for coarse-grained soils[J]. Chinese Journal of Geotechnical Engineering，2010，32(3)：460–467.(in Chinese))

[9] 周跃峰，谭国焕，甄伟文. 原状黄土剪缩性测试与理论分析[J]. 岩石力学与工程学报，2015，34(6)：1 242–1 249.(ZHOU Yuefeng，THAM L G，YAN Weiwen. Testing and theoretical analysis on contractive behavior of undisturbed loess[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(6)：1 242–1 249.(in Chinese))

[10] NG C W W，CHIU C F. Laboratory study of loose saturated and unsaturated decomposed granitic soil[J]. Journal of Geotechnical and Geoenvironmental Engineering，2003，129(6)：550–559.

[11] 中华人民共和国国家标准编写组. GB/T 50123—1999土工试验方法标准[S]. 北京：中国计划出版社，1999.(The National Standards Compilation Group of People¢s Republic of China. GB/T 50123—1999 Standard for soil test method[S]. Beijing：China Planning Press，1999.(in Chinese))

[12] 中华人民共和国行业标准编写组. SL176—2007水利水电工程施工质量检验与评定规程[S]. 北京：中国水利水电出版社，2007.(The Professional Standards Compilation Group of People¢s Republic of China. SL176—2007 Inspection and assessment specification for constructional quality of hydraulic and hydroelectric engineering[S]. Beijing：China Water Power Press，2007.(in Chinese))

[13] VERDUGO R，ISHIHARA K. The steady state of sandy soils[J]. Soils and Foundations，1996，36(2)：81–91.

[14] British Standard Institution. BS1377 Methods of test for soils for civil engineering purposes[S]. London：[s.n.]，1990.

[15] VAID Y P，ELIADORANI A. Instability and liquefaction of granular soils under undrained and partially drained states[J]. Canadian Geotechnical Journal，1998，35(6)：1 053–1 062.

[16] WOOD D M. Soil behaviour and critical state soil mechanics[M]. Cambridge：Cambridge University Press，1990：168–169.

[17] BEEN K，JEFFERIES M G. A state parameter for sands[J]. Geotechnique，1985，35(2)：99–112.

[18] KRAMER S L. Uncertainty in steady-state liquefaction evaluation procedures[J]. Journal of Geotechnical Engineering，1989，115(10)：1 402–1 419.

[19] YANG J. Non-uniqueness of flow liquefaction line for loose sand[J]. Geotechnique，2002，52(10)：757–760.

[20] POULOS S J，CASTRO G，FRANCE J W. Liquefaction evaluation procedure [J]. Journal of Geotechnical Engineering，1985，111(6)：772–792.

[21] 吕玺琳，赖海波，黄茂松. 饱和土体静态液化失稳理论预测[J]. 岩土力学，2014，35(5)：1 329–1 333.(LÜ Xilin，LAI Haibo，HUANG Maosong. Theoretically predicting instability of static liquefaction of saturated soils[J]. Rock and Soil Mechanics，2014，35(5)：1 329– 1 333.(in Chinese))

[22] SLADEN J A，D¢HOLLANDER R D，KRAHN J. The liquefaction of sands，a collapse surface approach[J]. Canadian Geotechnical Journal，1985，22：564–578.

[23] 周跃峰，谭国焕，甄伟文等. 入渗诱发黄土滑坡的力学机制. 岩土力学，2013，34(11)：3 173–3 179.(ZHOU Yuefeng，THAM L G，YAN W M，et al. Mechanism of infiltration-induced loess landslides[J]. Rock and Soil Mechanics，2013，34(11)：3 173–3 179.(in Chinese))

[24] ZHOU Y F. Study on landslides in loess slope due to infiltration[Ph. D. Thesis][D]. Hong Kong：The University of Hong Kong，2012.