基于平面激光诱导荧光的潜蚀可视化试验装置及其初步应用

doi:10.13722/j.cnki.jrme.2020.0740

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Abstract The evolution of suffusion initiating and progressing within internally unstable soil has the characteristics of high concealment and tremendous harmfulness. Conventional laboratory tests can only observe the migration of fine particles nearby the transparent wall or the motion trail of trace particles but cannot directly monitor the migration of fine particles within the soil，which significantly hinders the understanding of suffusion mechanisms. This paper developed a new suffusion visualization apparatus based on planar laser induced fluorescence technology(PLIF)，which consists of a permeameter，a PLIF system，a high speed camera and an image processing system，and produced transparent soil specimens by adopting melted quartz sand，#15 white oil and D80 Solvent oil with the same refractive index. A testing method for preparing high transparency internally unstable specimens was proposed，and a list of transparent soil suffusion tests were performed. The results indicate that the newly designed apparatus can continuously monitor the migration of fine particles within the specimens. Temperature has significant influence on the refractive index of liquid and the transparency specimens and hence，should seriously be controlled no more than 25 ℃. Fine particle content and minimum particle size also have significant effect on the specimen transparency，and it is suggested that the fine particle content should be less than 35% and the minimum particle size should be smaller than 0.2 mm. It is revealed that suffusion will progress along to the weak zones within the specimen，then form a concentrated leakage path and eventually result in damage of soil structure. The new apparatus based on PLIF will provide an effective tool for investigating the mesoscopic mechanisms of suffusion.

Key words： soil mechanics suffusion visualization planar laser induced fluorescence transparent soil mesoscopic mechanism

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	Articles by authors
	GU Jingyun1
	LUO Yulong1
	2
	ZHANG Xingjie1
	ZHAN Meili1
	WANG Yuan1
	SHENG Jinchang1

Cite this article:

GU Jingyun1,LUO Yulong1,2, et al. A suffusion visualization apparatus based on planar laser induced fluorescence and the preliminary application[J]. , 2021, 40(6): 1287-1296.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0740 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I6/1287

[1] International Commission on Large Dams(ICOLD). Internal erosion of existing dams，levees and dikes，and their foundations-Volume 1：Internal erosion processes and engineering assessment[M]. Paris：Bulletin Preprint，2013：1–164.
[2] 罗玉龙，速宝玉，盛金昌，等. 对管涌机理的新认识[J]. 岩土工程学报，2011，33(12)：1 895–1 902.(LUO Yulong，SU Baoyu，SHENG Jinchang，et al. New understanding of piping mechanism[J]. Chinese Journal of Geotechnical Engineering，2011，33(12)：1 895–1 902.(in Chinese))
[3] 吴梦喜，余挺，张琦. 深厚覆盖层潜蚀对大坝应力变形影响的有限元模拟[J]. 岩土力学，2017，38(7)：2 087–2 095.(WU Mengxi，YU Ting，ZHANG Qi. Finite element simulation of the influence of deep cover overburden on dam stress and deformation[J]. Rock and Soil Mechanics，2017，38(7)：2 087–2 095.(in Chinese))
[4] UL HAQ I. Tarbela Dam：resolution of seepage[C]// Proceedings of the Institution of Civil Engineers：Geotechnical Engineering. [S. l.]：[s. n.]，1996，119(1)：49–56.
[5] MOFFAT R，FANNIN R J. A hydromechanical relation governing internal stability of cohesionless soil[J]. Canadian Geotechnical Journal，2011，48(3)：413–424.
[6] 谢定松，蔡红，魏迎奇，等. 覆盖层不良级配砂砾石料渗透稳定特性及影响因素探讨[J]. 水利学报，2014，45(增2)：77–82.(XIE Dingsong，CAI Hong，WEI Yingqi，et al. Discussion of seepage stability characteristic of bad graded sand and gravel overlay[J]. Journal of Hydraulic Engineering，2014，45(Supp.2)：77–82.(in Chinese))
[7] LUO Y，NIE M，XIAO M. Flume-scale experiments on suffusion at the bottom of cutoff wall in sandy gravel alluvium[J]. Canadian Geotechnical Journal，2017，54(12)：1 716–1 727.
[8] ROCHIM A，MAROT D，SIBILLE L，et al. Effects of hydraulic loading history on suffusion susceptibility of cohesionless soils[J]. Journal of Geotechnical and Geoenvironmental Engineering，2017，143(7)：04017025.
[9] 刘昌军，姚秋玲，丁留谦，等. 堤基管涌小尺寸模型的细观试验研究[J]. 水利学报，2014，45(增2)：90–97.(LIU Changjun，YAO Qiuling，DING Liuqian，et al. Meso-scale test study on small-scale model of levee foundation piping[J]. Journal of Water Resources，2014，45(Supp.2)：90–97.(in Chinese))
[10] 姚志雄，周健，张刚，等. 颗粒级配对管涌发展的影响试验研究[J]. 水利学报，2016，47(2)：200–208.(YAO Zhixiong，ZHOU Jian，ZHANG Gang，et al. Experimental study on the influence of particle gradation on the development of pipe gush[J]. Journal of Hydraulic Engineering，2016，47(2)：200–208.(in Chinese))
[11] NGUYEN C D，BENAHMED N，ANDO E，et al. Experimental investigation of microstructural changes in soils eroded by suffusion using X-ray tomography[J]. Acta Geotechnica，2019，14(3)：749–765.
[12] 孔纲强，孙学谨，刘汉龙，等. 孔隙液体对透明土渗透特性影响对比试验[J]. 水利学报，2017，48(11)：1 303–1 310.(KONG Gangqiang，SUN Xuejin，LIU Hanlong，et al. Contrast test of the effect of pore liquid on the permeability of transparent soil[J]. Journal of Hydraulic Engineering，2017，48(11)：1 303–1 310.(in Chinese))
[13] 梁越，陈鹏飞，林加定，等. 基于透明土技术的多孔介质孔隙流动特性研究[J]. 岩土工程学报，2019，41(7)：1 361–1 366.(LIANG Yue，CHEN Pengfei，LIN Jiading，et al. Research on pore flow characteristics of porous media based on transparent soil technology[J]. Chinese Journal of Geotechnical Engineering，2019，41(7)：1 361–1 366.(in Chinese))
[14] HUNTER R P，BOWMAN E T. Visualisation of seepage-induced suffusion and suffosion within internally erodible granular media[J]. Geotechnique，2017，68(10)：918–930.
[15] 易立达，张仪萍. 透明土透明度对可视化测量精度的影响分析[J]. 科技通报，2018，34(8)：176–180.(YI Lida，ZHANG Yiping. Analysis of the effect of transparency of transparent soil on the accuracy of visual measurement[J]. Bulletin of Science and Technology，2018，34(8)：176–180.(in Chinese))
[16] DIJKSMAN J A，RIETZ F，LORINCZ K A，et al. Refractive index matched scanning of dense granular materials[J]. Review of Scientific Instruments，2012，83(1)：011301.
[17] WIEDERSEINER S，ANDREINI N，EPELY-CHAUVIN G，et al. Refractive-index and density matching in concentrated particle suspensions：a review[J]. Experiments in Fluids，2011，50(5)：1 183–1 206.
[18] KENNEY T C，LAU D. Internal stability of granular filters[J]. Canadian Geotechnical Journal，1985，22(2)：215–225.
[19] WAN C F，FELL R. Assessing the potential of internal instability and suffusion in embankment dams and their foundations[J]. Journal of Geotechnical and Geoenvironmental Engineering，2008，134(3)：401–407.
[20] LI M，FANNIN R J. Comparison of two criteria for internal stability of granular soil[J]. Canadian Geotechnical Journal，2008，45(9)：1 303–1 309.
[21] CHANG D S，ZHANG L M. Extended internal stability criteria for soils under seepage[J]. Soils and Foundations，2013，53(4)：569–583.
[22] 孔纲强，张鑫蕊，许文傧，等. 透明土中孔隙液体折射率、黏度系数与稳定性[J]. 水利水电科技进展，2017，37(4)：25–29.(KONG Gangqiang，ZHANG Xinrui，XU Wenbin，et al. Refractive index，viscosity coefficient and stability of pore fluids in transparent soil[J]. Advances in Science and Technology of Water Resources，2017，37(4)：25–29.(in Chinese))
[23] AUBERTIN M，BUSSIERE B，CHAPUIS R P. Hydraulic conductivity of homogenized tailings from hard rock mines[J]. Canadian Geotechnical Journal，1996，33(3)：470–482.
[24] SANVITALE N，BOWMAN E T. Internal imaging of saturated granular free-surface flows[J]. International Journal of Physical Modelling in Geotechnics，2012，12(4)：129–142.