Non-Cohesive Particles Starting Mechanism Under the Changing Seepage Direction

doi:10.3969/j.issn.1674-0696.2016.02.19

Journal of Chongqing Jiaotong University(Natural Science) ›› 2016, Vol. 35 ›› Issue (2): 89-92.DOI: 10.3969/j.issn.1674-0696.2016.02.19

• Port & Waterway · Hydraulic & Hydroelectric · Resources & Environment • Previous Articles Next Articles

Non-Cohesive Particles Starting Mechanism Under the Changing Seepage Direction

LIANG Yue^1,2,3, ZHANG Qiang^1,3, ZENG Chao^1,3, LIU Zeyu^1,3

(1.National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing 400074, P.R.China; 2. Supported by Key Laboratory of Ministry of Education for Geomechanics and EmbankmentEngineering, Hohai University, Nanjing 210098,Jiangsu, P.R.China；3.School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, P.R.China)

Received:2015-10-21 Revised:2015-11-19 Online:2016-04-25 Published:2016-04-25
Contact: 张强（1991—），男，四川南充人，硕士研究生，主要从事渗透破坏机理方面的研究。E-mail：1032926685@qq.com。

变向渗流下的无黏性土颗粒起动机理研究

梁越^1，2，3，张强^1，3，曾超^1，3，刘泽宇^1，3

(1.重庆交通大学国家内河航道整治工程技术研究中心，重庆 400074；2.河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京 210098；3.重庆交通大学水利水运工程教育部重点实验室，重庆400074)

作者简介:梁越（1985—），男，山东临沂人，副教授，博士，主要从事渗流理论与渗透破坏机理方面的研究。E-mail：liangyue2560@163.com。
基金资助:
国家自然科学基金项目（51409029；51349007）；重庆市教委科学技术研究项目（KJ130412）；重庆市基础与前沿研究计划项目（cstc2013jcyjA30006）；河海大学“岩土力学与堤坝工程”教育部重点实验室开放基金〖HJ0〗项目（GH201303）

Abstract

Abstract: Through varying angle model slots designed by self a series of non-cohesive particles starting tests were researched. The hydraulic gradient flow velocity and particle size were studied under the different angle between the seepage direction and the horizontal direction. Results show that the incipient velocity and hydraulic gradient of gravel particles increases as the angle between the seepage direction and the horizontal direction. Particles permeating the gap scouring becomes more difficulty.At the same time the incipient velocity and hydraulic gradient of gravel particles increases as the particle size when the angle keeps constant.With the particles being carried out, integral structure of the test sample is affected,it accelerates the seepage velocity and forms seepage channels which the average width narrow from downstream to upstream.

Key words: geotechnical engineering, piping, critical hydraulic gradient, threshold velocity, seepage

摘要： 通过自行设计的变角度模型槽，开展了一系列管涌发生时无黏性颗粒起动试验。研究在不同渗流方向时，水力梯度、渗流流速以及粒径对于细砂起动所造成的影响。试验结果表明：随着渗流方向与重力方向夹角的增大，同一粒径颗粒的临界起动流速以及对应的水力梯度均有增加，试样内部细颗粒通过空隙的难度加大。在同一渗流方向下，随着粒径增大，对应所需要的渗流流速和水力梯度也会相应增大。随着细颗粒不断的从空隙中被带走，试样的整体结构性受到影响，后续的渗流破坏速度会加快，形成了平均宽度由下游至上游变窄的渗流通道。

关键词: 岩土工程, 管涌, 临界水力坡降, 起动流速, 渗流破坏

CLC Number:

U617.5
TU441

LIANG Yue, ZHANG Qiang, ZENG Chao, LIU Zeyu,. Non-Cohesive Particles Starting Mechanism Under the Changing Seepage Direction[J]. Journal of Chongqing Jiaotong University(Natural Science), 2016, 35(2): 89-92.

梁越，张强，曾超，刘泽宇,. 变向渗流下的无黏性土颗粒起动机理研究[J]. 重庆交通大学学报（自然科学版）, 2016, 35(2): 89-92.

References

［1］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):1895-1902.
LUO Yulong,SU Baoyu,SHENG Jinchang,et al.New understandings on piping mechanism［J］.Chinese Journal of Geotechnical Engineering,2011,33(12):1895-1902.
［2］刘忠玉,苗天德.无粘性管涌型土的判定［J］.岩土力学,2004,25(7):1072-1076.
LIU Zhongyu,MIAO Tiande.Assessment for the noncohesive piping-typed soils［J］.Rock and Soil Mechanics,2004,25(7):1072-1076.
［3］钟亮,许光祥,马明生.无黏性均匀沙起动临界条件的统一［J］.水运工程,2007(8):13-16.
ZHONG Liang,XU Guangxiang,MA Mingsheng.Generality of incipient motion critical conditions of cohesionless uniform sediment［J］.Port & Waterway Engineering,2007(8):13-16.
［4］杨奉广,曹叔尤,刘兴年,等.非均匀沙分级起动流速研究［J］.四川大学学报(工程科学版),2008,40(5):51-57.
YANG Fengguang,CAO Shuyou,LIU Xingnian,et al.Study on incipient velocity of individual fradctions of non-uniform sediment［J］.Journal of Sichuan University(Engineering Science Edition),2008,40(5):51-57.
［5］唐造造,方铎.非均匀沙起动的有关问题［J］.四川水力发电,1997,16(1):69-72.
TANG Zaozao,FANG Duo.On the incipient motion of non uniform sediments［J］.Sichuan Water Power,1997,16(1):69-72.
［6］王思莹,段文刚,李利.宽级配非均匀沙运动特性研究［J］.人民长江,2011,42(13):72-75.
WANG Siying,DUAN Wengang,LI Li.Study on motion characteristics of wide graded non-uniform sediments［J］.Yangtze River,2011,42(13):72-75.
［7］何文社,方铎,雷孝章,等.均匀沙起动流速研究［J］.人民长江,2002,33(5):37-38.
HE Wenshe,FANG Duo,LEI Xiaozhang,et al.Study on incipient velocity of uniform sand［J］.Yangtze River,2002,33(5):37-38.
［8］栾艳,赵明阶,汪魁.基于流-固耦合理论的病险土石坝渗流规律［J］.重庆交通大学学报(自然科学版),2010,29(5):741-744.
LUAN Yan,ZHAO Mingjie,WANG Kui.Analysis of diseased earth-rockfill dam seepage based on coupled fluid-solid theorem［J］.Journal of Chongqing Jiaotong University (Natural Science),2010,29(5):741-744 .
［9］杨胜发,王涵,周华君.卵砾石边坡坡脚泥沙起动试验研究［J］.重庆交通大学学报(自然科学版),2009,28(2):241-245.
YANG Shengfa,WANG Han,ZHOU Huajun.Experimental study on incipient motion of gravel sediments at the foot of slopes［J］.Journal of Chongqing Jiaotong University(Natural Science),2009,28(2):241-245.
［10］江二中,李洋.天然卵砾石的几何形状对起动流速的影响［J］.重庆交通大学学报(自然科学版),2013,32(5):1014-1017.
JIANG Erzhong,LI Yang.Influence of natural gravel geometric shape on starting velocity［J］.Journal of Chongqing Jiaotong University (Natural Science),2013,32(5):1014-1017.
［11］KRAMER H.Sand mixtures and sand movement in fluvial models［J］.Transactions of the American Society of Civil Engineers,1935,100(1):873-878.
［12］何文社,曹叔尤,刘兴年,等.不同底坡的均匀沙起动条件［J］.水利水运工程学报,2003(3):23-26.
HE Wenshe,CAO Shuyou,LIU Xingnian,et al.Incipient condition of uniform sediment on different bed slopes［J］.Hydro-Science and Engineering,2003(3):23-26.
［13］胡春宏.关于泥沙运动基本概率的研究［J］.水科学进展,1998,9(1):15-21.
HU Chunhong.Investigation on basic probability of grain motion［J］.Advances in Water Science,1998,9(1):15-21.

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Non-Cohesive Particles Starting Mechanism Under the Changing Seepage Direction

变向渗流下的无黏性土颗粒起动机理研究

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