Evolution characteristics and prediction model on suffusion of silty-sand subjected to seepage

CHEN Yong; MING Zexin; XIA Zhenyao; LONG Haipeng

doi:10.11835/j.issn.2096-6717.2021.152

您当前的位置：

首页 >

文章列表页 >

Evolution characteristics and prediction model on suffusion of silty-sand subjected to seepage

Civil Engineering | 更新时间：2023-09-19

- Evolution characteristics and prediction model on suffusion of silty-sand subjected to seepage
- Journal of Civil and Environmental Engineering Vol. 45, Issue 5, Pages: 18-25(2023)
- 作者机构：
  
  三峡大学三峡库区地质灾害教育部重点实验室，湖北宜昌 443002
- 作者简介：
  
  CHEN Yong (1980- ), PhD, professor, doctorial supervisor, main research interests: soil-water coupling mechanism and slope stability evaluation, E-mail: cyonger@126.com.
  XIA Zhenyao （corresponding author）, PhD, professor, doctorial supervisor, E-mail: xzy_yc@126.com.
- 基金信息：
  
  Key Project Supported by the Joint Funds of the National Natural Science Foundation of China(U2040207);Project of China Geological Survey(0001212020CC60002)
- DOI：10.11835/j.issn.2096-6717.2021.152
  CLC： TU411.4
- Received：07 June 2021，
  
  Published：25 October 2023
- 稿件说明：
移动端阅览
CHEN Yong, MING Zexin, XIA Zhenyao, et al. Evolution characteristics and prediction model on suffusion of silty-sand subjected to seepage[J]. Journal of Civil and Environmental Engineering, 2023, 45(5): 18-25.
DOI：

CHEN Yong, MING Zexin, XIA Zhenyao, et al. Evolution characteristics and prediction model on suffusion of silty-sand subjected to seepage[J]. Journal of Civil and Environmental Engineering, 2023, 45(5): 18-25. DOI： 10.11835/j.issn.2096-6717.2021.152.

摘要

长期渗流作用下，土体发生内部潜蚀常会诱发结构变形甚至破坏。利用自主研发的渗流装置开展砂土潜蚀试验，研究渗流作用下不同初始孔隙比粉土质砂的颗粒流失过程及潜蚀演变特征，并阐明各影响因素的作用机制，建立颗粒流失量随水力梯度和时间增长的预测模型，继而基于颗粒级配试验和三相关系推演，揭示粒度分布与孔隙比的变化规律。结果表明：渗流作用易导致砂土内部细颗粒和砂粒流失并逐渐形成优势渗流通道，诱发砂土局部坍塌并在持续潜蚀后呈整体不均匀沉降变形，直至水压主要沿优势通道消散时，达到潜蚀稳定；初始孔隙比或密实度是影响土体潜蚀程度的主要内部因素，直接改变了颗粒移动的起动水力梯度、流失速率、累积总质量及土样沉降变形量，水力梯度增大会加快颗粒流失、通道形成和潜蚀稳定；建立的预测模型拟合度高，能较好地反映上述演化特征以及初始孔隙比和水力梯度对颗粒流失发展规律及稳定时间的影响；潜蚀对粉土质砂物理状态的影响主要表现在孔隙比总体增大而颗粒粒径的不均匀性降低。

Abstract

Soil suffusion induced by long-term seepage generally lead to deformation or damage of soil structure. The suffusion experiments of silty sand had been accomplished by the independently developed seepage instrument

to study the particle loss process and suffusion evolution characteristics of silty sand with different void ratios induced by seepage of different hydraulic gradients

and the influential mechanism of factors is understood on the sand suffusion

then a model is established to predict the increase of particle loss with seepage duration and hydraulic gradient. Furthermore

the development patterns are revealed of particles size distribution and void ratio during suffusion based on the particle grading test and three phases relationship. The results show that: firstly

fine and sandy particles are both washed away by the long-term seepage and some dominant seepage channels will form subsequently in the samples

and then the internal local collapse and the overall differential settlement will be induced by continuous suffusion

until the water pressure mainly dissipates along the dominant channel to achieve the suffusion stability. Secondly

the initial void ratio or compactness is the main internal factor affecting the degree of the seepage suffusion of the soil

which directly changes the hydraulic gradient threshold

loss rate

cumulative total mass of particle movement and settlement deformation of sandy samples. The increase of the hydraulic gradient will also accelerate the particles loss

channel formation and suffusion stability. Thirdly

the prediction model fits the experiment result well

which can reflect evolution characteristics above and the influence on particles loss process of initial void ratio as well as the hydraulic gradient. Finally

the void ratio of samples will increase and the uniformity of particle size will decrease during sand suffusion.

关键词

Keywords

references

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 .

CHANG D S , ZHANG L M . Extended internal stability criteria for soils under seepage [J]. Soils and Foundations , 2013 , 53 ( 4 ): 569 - 583 .

INDRARATNA B , ISRAR J , RUJIKIATKAMJORN C . Geometrical method for evaluating the internal instability of granular filters based on constriction size distribution [J]. Journal of Geotechnical and Geoenvironmental Engineering , 2015 , 141 ( 10 ): 04015045 .

DOUGLAS K J , FELL R , PEIRSON W L , et al . Experimental investigation of global backward erosion and suffusion of soils in embankment dams [J]. Canadian Geotechnical Journal , 2019 , 56 ( 6 ): 789 - 807 .

OUYANG M , TAKAHASHI A . Influence of initial fines content on fabric of soils subjected to internal erosion [J]. Canadian Geotechnical Journal , 2016 , 53 ( 2 ): 299 - 313 .

SHARIF Y A , ELKHOLY M , HANIF CHAUDHRY M , et al . Experimental study on the piping erosion process in earthen embankments [J]. Journal of Hydraulic Engineering , 2015 , 141 ( 7 ): 04015012 .

MING P , LU J , CAI X , et al . Experimental study on internal erosion and seepage in the foundation of a dike under variable water head [J]. European Journal of Environmental and Civil Engineering , 2021 : 1- 16 ( 11 ): 5073 - 5087 .

CHANG D S , ZHANG L M . Critical hydraulic gradients of internal erosion under complex stress states [J]. Journal of Geotechnical and Geoenvironmental Engineering , 2013 , 139 ( 9 ): 1454 - 1467 .

蒋中明 , 王为 , 冯树荣 , 等 . 应力状态下含黏粗粒土渗透变形特性试验研究 [J]. 岩土工程学报 , 2014 , 36 ( 1 ): 98 - 104 .

JIANG Z M , WANG W , FENG S R , et al . Experimental study on influence of stress state on seepage failure characteristics of coarse grained soil with cohesive particles [J]. Chinese Journal of Geotechnical Engineering , 2014 , 36 ( 1 ): 98 - 104 . (in Chinese)

WANG G , HORIKOSHI K , TAKAHASHI A . Effects of internal erosion on parameters of subloading cam-clay model [J]. Geotechnical and Geological Engineering , 2020 , 38 ( 2 ): 1323 - 1335 .

STERPI D . Effects of the erosion and transport of fine particles due to seepage flow [J]. International Journal of Geomechanics , 2003 , 3 ( 1 ): 111 - 122 .

CIVIDINI A , BONOMI S , VIGNATI G C , et al . Seepage-induced erosion in granular soil and consequent settlements [J]. International Journal of Geomechanics , 2009 , 9 ( 4 ): 187 - 194 .

YANG J , YIN Z Y , LAOUAFA F , et al . Hydromechanical modeling of granular soils considering internal erosion [J]. Canadian Geotechnical Journal , 2020 , 57 ( 2 ): 157 - 172 .

沈辉 , 罗先启 , 毕金锋 . 土石混合体渗透侵蚀特性数值模拟研究 [J]. 岩土力学 , 2017 , 38 ( 5 ): 1497 - 1502, 1509 .

SHEN H , LUO X Q , BI J F . Numerical simulation of internal erosion characteristics of block in matrix soil aggregate [J]. Rock and Soil Mechanics , 2017 , 38 ( 5 ): 1497 - 1502, 1509 . (in Chinese)

ZHANG L L , WU F , ZHANG H , et al . Influences of internal erosion on infiltration and slope stability [J]. Bulletin of Engineering Geology and the Environment , 2019 , 78 ( 3 ): 1815 - 1827 .

雷小芹 , 刘恩龙 , 何思明 , 等 . 非饱和堆积土边坡降雨-渗流潜蚀耦合过程模拟 [J]. 工程科学与技术 , 2021 , 53 ( 2 ): 28 - 37 .

LEI X Q , LIU E L , HE S M , et al . Modelling of coupled process of rainfall infiltration and internal erosion within unsaturated deposited soil slopes [J]. Advanced Engineering Sciences , 2021 , 53 ( 2 ): 28 - 37 . (in Chinese)

王越林 , 陆烨 . 城市地区管道渗漏引发地面塌陷成灾机理的CFD-DEM联合计算模拟分析 [J]. 土木与环境工程学报(中英文) , 2021 , 43 ( 2 ): 60 - 67 .

WANG Y L , LU Y . CFD-DEM simulation of disaster mechanism of pavement collapse caused by pipeline leakage in urban areas [J]. Journal of Civil and Environmental Engineering , 2021 , 43 ( 2 ): 60 - 67 . (in Chinese)

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Prediction model for horizontal axis deviation of segment during construction stage of small curvature radius shield tunnel

Prediction model of ground settlement caused by construction of double track parallel shield tunnels under arbitrary layout

Machine learning method for overall stability of welded constant section box columns made of high strength steel

Carbonation durability performance and carbonation prediction model of shotcrete permanent support structure after frost damage

Mesoscopic pore structure of soft soil during electro-osmosis

Related Author

ZHU Chunzhou

ZOU Jinfeng

WANG Chao

ZHOU Yi

MA Jun

CHEN Peijian

XU Hao

ZHANG Yingying

Related Institution

China Railway Shanghai Design Institute Group Co., Ltd.

School of Civil Engineering, Central South University

a. School of Mechanics and Civil Engineering; 1b. Jiangsu Key Laboratory of Environmental Disaster and Structural Reliability of Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, P. R. China; 2. South Branch of China Construction Eighth Engineering Bureau Co., Ltd, Shenzhen 518035, Guangdong, P. R. China; 3. College of Civil Engineering, Southwest Jiaotong University, Chendu

中国矿业大学，江苏省土木工程环境灾变与结构可靠性重点实验室

中国建筑第八工程局有限公司南方分公司

AI问答

Address：Journals Department, Chongqing University, 174 Shazhengjie, Chongqing 400044, P.R.China Postal code：400044
Tel：+86-23-65111322 Email：xuebao@cqu.edu.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰