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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摘要潜蚀的发生发展均位于不稳定土体内部，隐蔽性强，危害性大。常规测试手段等均只能观测到仪器壁面或者部分示踪粒子的运动轨迹，无法观测到土体内部的颗粒移动，严重阻碍了对潜蚀发生发展机制的认识。基于平面激光诱导荧光技术(PLIF)研制了潜蚀可视化试验装置。该装置包括渗透仪、PLIF系统、高速摄像机及图像处理系统等。选用折射率匹配的熔融石英砂、15#白油及D80溶剂油配制透明土，探讨制备高透明度的内部不稳定的透明土试样的试验方法，初步开展透明土潜蚀试验研究。研究表明：新的试验装置能够实时观测到透明土内部不同位置的颗粒运移。环境温度对液体折射率及试样透明度影响较大，试验过程必须严格控制环境温度在25 ℃及以下。内部不稳定土体中细颗粒含量和最小粒径对试样透明度影响显著，建议细颗粒含量应低于35%，同时，最小颗粒粒径应不小于0.2 mm。潜蚀的发生发展进程是不均衡的，它会沿着试样内部薄弱位置发展，最终形成贯穿上下游的优势渗流路径，诱发土体结构破坏。基于PLIF的潜蚀可视化试验装置将为深入认识潜蚀细观机制提供一种有效的研究工具。

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	谷敬云1
	罗玉龙1
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	张兴杰1
	詹美礼1
	王媛1
	盛金昌1

关键词 ：土力学, 潜蚀, 可视化, 平面激光诱导荧光, 透明土, 细观机制

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

引用本文:

谷敬云1，罗玉龙1，2，张兴杰1，詹美礼1，王媛1，盛金昌1. 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[J]. 岩石力学与工程学报, 2021, 40(6): 1287-1296.
GU Jingyun1，LUO Yulong1，2，ZHANG Xingjie1，ZHAN Meili1，WANG Yuan1，SHENG Jinchang1. A suffusion visualization apparatus based on planar laser induced fluorescence and the preliminary application. , 2021, 40(6): 1287-1296.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0740 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I6/1287

[18]	KENNEY T C，LAU D. Internal stability of granular filters[J]. Canadian Geotechnical Journal，1985，22(2)：215-225.
[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.
[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.
[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))
[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))
[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.
[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.
[21]	CHANG D S，ZHANG L M. Extended internal stability criteria for soils under seepage[J]. Soils and Foundations，2013，53(4)：569-583.
[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.
[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.
[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))
[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))
[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.
[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.
[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))
[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.
[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))
[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.
[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))
[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.
[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.