土/滤料界面上不同入渗角的接触侵蚀试验研究

doi:10.13722/j.cnki.jrme.2021.0863

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (3396 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The infiltration angle of the soil/filter interface is deflected with nonhomogeneous anisotropic seepage filed and fluid regime in dyke-dams so as to bring about the local hydraulic factors mutation when the interface infiltration angle is nonorthogonal. In this paper，a multi-function seepage piping instrument was developed to carry out contact erosion tests. The test samples of the fill and filter material were taken from the site of the earth dam construction，and they were prepared at the angles of 30°，45°，60° and 90° between the seepage flow and the interface. It was conducted to investigate the mechanism of contact erosion by measuring the hydraulic interface factors under different hydraulic gradients in the laboratory. At the same time，a PFC3D numerical model was established by using the CFD-DEM method. The micro properties of internal erosion at the contact interface of soil/filter were simulated and analyzed by comparing with the experimental data according to the experimental facility?s working conditions. The results show that the seepage infiltration angle at the soil/filter interface has a significant impact on the effect of filtration. The indicators of the filter are better when the infiltration flow is orthogonal to the interface. However，the hydraulic factors comprising the infiltration flow velocity，the local hydraulic gradient，the pore pressure and the soil pressure have obvious variations due to the seepage flow refraction when the interface infiltration angle decreases. The fast seepage velocity aggravates the internal contact erosion and causes an accumulation more in the number of fine particles from the protected soil at the local interface，which weakens the filter efficiency of the filtering layer. It should be pointed out that both the experiment and numerical simulation reveal that the filter specimens still keep the function under a high hydraulic gradient，indicating that the current filter criterion has enough safety reserve.

Key words： soil mechanics soil/filter interface infiltration angle contact erosion PFC3D simulation filtration performance

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Hongyu1
	CHAI Pengxiang1
	2
	ZHANG Gang1
	LI Jie1
	ZHANG Guangzhao1
	YAN Chao1

Cite this article:

WANG Hongyu1,CHAI Pengxiang1,2, et al. Contact erosion experiment research of soil/filter interfaces subject to different infiltration angles[J]. , 2022, 41(7): 1488-1500.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0863 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I7/1488

[1]	ICOLD. Internal erosion of existing dams，levees and dikes，and their foundations，Bulletin 164[C]// International Commission on Large Dams. Paris，France：[s. n.]，2017：56–59.
[2]	RICHARDS K S，REDDY K R. Critical appraisal of piping phenomena in earth dams[J]. Bulletin of Engineering Geology and the Environment，2007，66(4)：381–402.
[3]	ZHANG L，PENG M，CHANG D. Dam failure mechanisms and risk assessment[M]. Singapore：John Wiley and Sons，2016：1–60.
[4]	FELL R，FRY J J. The state of the art of assessing the likelihood of internal erosion of embankment dams，water retaining structures and their foundations[M]. London，UK：Internal Erosion of Dams and Their Foundations，Taylor and Francis，2007：1–24.
[5]	FANNIN J. KARL TERZAGHI：From theory to practice in geotechnical filter design[J]. Journal of Geotechnical and Geoenvironmental Engineering，2008，134(3)：267–276.
[6]	刘杰，谢定松. 我国土石坝渗流控制理论发展现状[J]. 岩土工程学报，2011，33(5)：714–718.(LIU Jie，XIE Dingsong. Advances of earth-rock dam seepage control theory in China[J]. Chinese Journal of Geotechnical Engineering，2011，33(5)：714–718.(in Chinese))
[7]	SEED H B，DUNCAN J M. The failure of teton dam[J]. Engineering Geology，1987，(24)：173–205.
[8]	SHERARD J L. Lessons from the Teton dam failure[J]. Engineering Geology，1987，(24)：239–256.
[9]	李君纯. 青海沟后水库溃坝原因分析[J]. 岩土工程学报，1994，16(6)：1–14.(LI Junchun. Gouhou dam and analysis for causes of the dam failure[J]. Chinese Journal of Geotechnical Engineering，1994，16(6)：1–14.(in Chinese))
[10]	KENNEY T C，CHAHAL R，CHIU E. Controlling constriction sizes of granular filters[J]. Canadian Geotechnical Journal，1985，22(1)：32–43.
[11]	SKEMPTON A W，BROGAN J. Experiments on piping in sandy gravels[J]. Géotechnique，1994，44(3)：449–460.
[12]	MOFFAT R，FANNIN R J. A large permeameter for study of internal stability in cohesionless soils[J]. Geotechnical Testing Journal，2006，29(4)：273–279.
[13]	MOFFAT R，FANNIN R J，GARNER. Spatial and temporal progression of internal erosion in cohesionless soil[J]. Canadian Geotechnical Journal，2011，48(3)：399–412.
[14]	MOFFAT R，FANNIN R J. A hydromechanical relation governing internal stability of cohesionless soil[J]. Canadian Geotechnical Journal，2011，48(3)：413–424.
[15]	CYRIL G，YVES-HENRI F，RéMI B，et al. Contact erosion at the interface between granular coarse soil and various base soils under tangential flow condition[J]. Journal of Geotechnical and Geoenvironmental Engineering，2010，136(5)：741–750.
[16]	刘杰. 无黏性土层之间渗流接触冲刷机制试验研究[J]. 水利水电科技进展，2011，31(3)：27–30.(LIU Jie. Mechanism of seepage contact scour between cohesionless soil layers[J]. Advances in Science and Technology of Water Resources，2011，31(3)：27–30.(in Chinese))
[17]	MAROT D，BENDAHMANE F，LE V T. New apparatus for assessing soil suffusion susceptibility under two flow directions[C]// Internal Erosion in Earthdams，Dike and Levees Proceeding of EWG-IE 26th Annual Meeting 2018. [S. l.]：[s. n.]，2018：69–80.
[18]	MAROT D，ROCHIM A，NGUYEN H，et al. Assessing the susceptibility of gap-graded soils to internal erosion：proposition of a new experimental methodology[J]. Natural Hazards，2016，83(1)：365–388.
[19]	PACHIDEH V，MIR M H S M. A new physical model for studying flow direction and other influencing parameters on the internal erosion of soils[J]. Geotechnical Testing Journal，2019，42(6)：20170301.
[20]	中华人民共和国行业标准编写组. SL274—2020 碾压式土石坝设计规范[S]. 北京：中国水利水电出版社，2021.(The Professional Standards Compilation Group of People?s Republic of China. SL274—2020 Design code for rolled earth-rock fill dams[S]. Beijing：China Water Power Press，2021.(in Chinese))
[21]	中华人民共和国行业标准编写组. DL/T 5395—2007 碾压式土石坝设计规范[S]. 北京：中国电力出版社，2008.(The Professional Standards Compilation Group of People?s Republic of China. DL/T5395—2007 Design specification for rolled earth-rock fill dams[S]. Beijing：China Electric Power Press，2008.(in Chinese))
[22]	贝尔 J. 多孔介质流体动力学[M]. 李竞生，陈崇希译. 北京：中国建筑工业出版社，1983：104–113.(BEAR J. Dynamics of fluids in porous media[M]. Translated by LI Jingsheng，CHEN Chongxi. Beijing：China Construction Industry Press，1983：104–113.(in Chinese))
[23]	薛禹群. 地下水动力学原理[M]. 北京：地质出版社，1986：1–60.(XUE Yuqun. Groundwater dynamics principe[M]. Beijing：Geology Press，1986：1–60.(in Chinese))
[24]	RICHARDS K，REDDY K. True triaxial piping test apparatus for evaluation of piping potential in earth structures[J]. Geotechnical Testing Journal，2010，33(1)：83–95.
[25]	罗玉龙，吴强，詹美礼，等. 渗流–侵蚀–应力耦合管涌试验装置的研制及初步应用[J]. 岩石力学与工程学报，2013，32(10)：2 108–2 114.(LUO Yulong，WU Qiang，ZHAN Meili，et al. Development of seepage-erosion-stress coupling piping test appartus and its parimary application[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(10)：2 108–2 114.(in Chinese))
[26]	WANG Y，CHAI J，XU Z，et al. Numerical simulation of the fluid-solid coupling mechanism of internal erosion in granular soil[J]. Water，2020，12(1)：10.3390/w12010137.
[27]	周博，汪华斌，赵文锋，等. 黏性材料细观与宏观力学参数相关性研究[J]. 岩土力学，2012，33(10)：3 171–3 175.(ZHOU Bo，WANG Huabin，ZHAO Wenfeng，et al. Analysis of relationship between particle mesoscopic and macroscopic mechanical parameters of cohesive materials[J]. Rock and Soil Mechanics，2012，33(10)：3 171–3 175.(in Chinese))
[28]	廖雄华，周健，徐建平，等. 黏性土室内平面应变试验的颗粒流模拟[J]. 水利学报，2002，33(12)：11–17.(LIAO Xionghua，ZHOU Jian，XU Jianping，et al. Simulation of plane strain test of clay by means particle flow code[J]. Journal of Hydraulic Engineering，2002，33(12)：11–17.(in Chinese))
[29]	刘洋，周健，付建新. 饱和砂土流固耦合细观数值模型及其在液化分析中的应用[J]. 水利学报，2009，40(2)：250–256.(LIU Yang，ZHOU Jian，FU Jianxin. Fluid-particle coupled model for saturated sand and its application to liquefaction analysis[J]. Journal of Hydraulic Engineering，2009，40(2)：250–256.(in Chinese))
[30]	柴鹏翔，王红雨，杨佩瑶，等. 土与反滤层接触面上入渗角对反滤效果的影响[J]. 应用力学学报，待刊.(CHAI Pengxiang，WANG Hongyu，YANG Peiyao，et al. The influence on the effect of filter caused from theinfiltration angle of the contact surface between soil and filter[J]. Chinese Journal of Applicd Mcchanics，to be Pressed.(in Chinese))
[31]	李晓晖. 张峰水库黏土斜心墙堆石坝反滤层渗透稳定性探讨[J]. 水利水电技术，2008，39(10)：72–74.(LI Xiaohui. Discussion on seepage stability of filter layer in rock-fill dam with sloping clay core of Zhangfeng reservior[J]. Water Resources and Hydropower Engineering，2008，39(10)：72–74.(in Chinese))
[32]	朱亚军，彭君，陈群. 砂砾石与黏土的接触冲刷试验研究[J]. 岩土工程学报，2016，38(增2)：92–97.(ZHU Yajun，PENG Jun，CHEN Qun. Contact scouring tests on sandy gravel and cohesive soil[J]. Chinese Journal of Geotechnical Engineering，2016，38(Supp.2)：92–97.(in Chinese))
[33]	陈群，谷宏海，何昌荣. 砾石土防渗料–反滤料联合抗渗试验[J]. 四川大学学报：工程科学版，2012，44(1)：13–18.(CHEN Qun，GU honghai，HE Changrong. Combination seepage failure test of gravelly soil and the filter[J]. Journal of Sichuan University：Engineering Sciences，2012，44(1)：13–18.(in Chinese))
[34]	李露，陈群，王卓. 不同接触倾角的砂砾石与粉土的接触冲刷试验[J]. 人民长江，2019，50(增2)：185–188.(LI Lu，CHEN Qun，WANG Zhuo. Contact scouring test of sand gravel and silt with different contact angles[J]. Yangtze River，2019，50(Supp.2)：185–188. (in Chinese))
[35]	郑咏琎，陈群，王卓，等. 渗流方向对红黏土与砂接触流失影响的试验研究[J]. 中国农村水利水电，2020，(1)：160–163.(ZHENG Yongjin，CHEN Qun，WANG Zhuo，et al. Experimental research on the influence of seepage direction on the contact loss of laterite and sand[J]. China Rural Water and Hydropower，2020，(1)：160–163.(in Chinese))