砂砾石与黏土的接触冲刷试验研究

朱亚军; 彭君; 陈群

doi:10.11779/CJGE2016S2015

砂砾石与黏土的接触冲刷试验研究 English Version

1. 四川大学水利水电学院水力学与山区河流开发保护国家重点实验室,四川成都 610065;
2. 中铁二院工程集团有限责任公司公路与市政分院,成都 610061

基金项目: 四川省学术和技术带头人培育基金（川人[2015] 100-8）

详细信息

作者简介:
朱亚军(1991- ),男,硕士研究生,主要从事岩土体渗流特性的研究。E-mail: zhuyajun163address@163.com。

计量
- 文章访问数: 338
- HTML全文浏览量: 2
- PDF下载量: 258
出版历程
- 收稿日期: 2016-05-18
- 发布日期: 2016-10-19

Contact scouring tests on sandy gravel and cohesive soil

1. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Hydraulic and Hydroelectric Engineering, Sichuan University, Chengdu 610065, China;
2. Road & Municipal Design and Research Institute, China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

摘要

摘要: 覆盖层中的接触冲刷破坏是工程界越来越关注的渗透破坏问题,砂砾石与黏土的接触面易发生接触冲刷,因此有必要对其主要影响因素进行深入研究。通过竖向和水平向接触冲刷渗透试验分析成层土中砂砾石干密度和级配对砂砾石与黏性土的接触冲刷的影响规律及接触冲刷发生的过程。试验结果表明,砂砾石与黏土的接触冲刷破坏过程分为稳定阶段、过渡阶段和破坏阶段,渗透破坏刚开始发生时即稳定阶段与过渡阶段的交界点对应的水力坡降称为启动坡降,渗透破坏充分发展时即过渡阶段与破坏阶段的交界点对应的水力坡降称为破坏坡降。接触冲刷的发生主要受砂砾石的干密度和级配影响。砂砾石的干密度越大,试样整体渗透性越小,发生接触冲刷的启动坡降和破坏坡降就越大。随着砂砾石级配的变粗,试样整体渗透性变大,发生接触冲刷的启动坡降和破坏坡降变小。相同条件下与竖向渗流相比,水平向渗流接触冲刷的渗透系数更大,破坏坡降更小。
- 覆盖层 /
- 接触冲刷 /
- 砂砾石 /
- 黏土
Abstract: The contact scouring in the covering layer has attracted more and more concern in the engineering. The contact scouring at the interface between sandy gravel and cohesive soil is easy to happen, so it is necessary to study the main influence factors and the process of contact scouring to reveal its mechanism. Through the experiments of vertical and horizontal contact scouring, the influence of the dry density and grading of sandy gravel on the contact scouring between sandy gravel and cohesive soil is analyzed. The results show that the process of contact scouring can be divided into three stages, stable stage, transition stage and failure stage. The hydraulic gradient when the contact scouring just happens is called starting gradient, and it is called failure gradient when the seepage failure finally occurs. The contact scouring is mainly affected by the dry density and grading of sandy gravel. The greater the dry density of sandy gravel, the lower the permeability of the sample. At the same time, the starting gradient and the failure gradient both increase. The permeability is greater and the starting gradient and the failure gradient of contact scouring are lower when the particle of the sandy gravel becomes coarser. Compared with those under vertical contact scouring under the same condition, the permeability of samples under horizontal seepage is greater and the failure gradient is lower.
- overburden layer /
- contact scouring /
- sandy gravel /
- cohesive soil

HTML全文

参考文献(10)

[1]	夏万洪, 魏星灿, 杜明祝. 冶勒水电站坝基超深厚覆盖层Q3的工程地质特性及主要工程地质问题研究[J]. 水电站设计, 2009, 25(2): 81-87. (XIA Wan-hong, WEI Xing-can, DU Ming-zhu. Study on engineering geology properties and main problems of Yele Hydropower Station Dam foundation extra-thick overburden Q3[J]. Design of Hydroelectric Power Station, 2009, 25(2): 81-87. (in Chinese))
[2]	刘杰. 无黏性土层之间渗流接触冲刷机理试验研究[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))
[3]	ИСТОМИНА В С. Филътрачионная устойчивостъ грунтов. Госстройиэдат[M]. 1957. (ISTOMINA B C. Soil seepage stability[M]. Moscow: Institute of Water Resources and Hydropower Research, 1957. (in Russian))
[4]	王保田, 陈西安. 悬挂式防渗墙防渗效果的模拟试验研究[J]. 岩石力学与工程学报, 2008, 27(增刊1): 2766-2771. (WANG Bao-tian, CHEN Xi-an. Research on effect of suspended cut-off wall with simulation test[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(S1): 2766-2771. (in Chinese))
[5]	陈建生, 刘建刚, 焦月红. 接触冲刷发展过程模拟研究[J]. 中国工程科学, 2003, 5(7): 33-39. (CHEN Jian-sheng, LIU Jian-gang, QIAO Yue-hong. Simulation study on the contact scouring development between underground layers[J]. Engineering Science, 2003, 5(7): 33-39. (in Chinese))
[6]	邓伟杰. 土石坝接触冲刷试验与分析研究[D]. 南京: 河海大学, 2008. (DENG Wei-jie. Experiment and analysis of the contact scouring of earth-rock dam[D]. Nanjing: Hohai University, 2008. (in Chinese))
[7]	冯建明, 张世殊, 田雄, 等. 双江口水电站坝址区深厚覆盖层工程地质特性初步研究[J]. 水电站设计, 2011, 27(2): 55-57. (FENG Jian-ming, ZHANG Shi-shu, TIAN Xiong, et al. Preliminary study of the engineering geological features of the deep layer in Shuangjiangkou hydropower station[J]. Design of Hydroelectric Power Station, 2011, 27(2): 55-57. (in Chinese))
[8]	陈群, 谷宏海. 土体水平向渗透系数测量仪[P]. 中国: 201010523941.5.2012.5. (CHEN Qun, GU Hong-hai. Horizontal permeameter of soil[P]. China: 201010523941.5.2012.5. (in Chinese))
[9]	SL237—1999 土工试验规程[M]. 北京: 中国水利水电出版社, 1999. (SL237—1999 Specification of soil test[M]. Beijing: China Water & Power Press, 1999. (in Chinese))
[10]	朱崇辉, 王增红, 刘俊民. 粗粒土的渗透破坏坡降与颗粒级配的关系研究[J]. 中国农村水利水电, 2006(3): 72-75. (ZHU Chong-hui, WANG Zeng-hong, LIU Jun-min. Study on the relation between the permeation damage slope and the grain composition of coarse-grained soil[J]. China Rural Water and Hydropower, 2006(3): 72-75. (in Chinese))

施引文献(4)

期刊类型引用(3)

1.	沈扬，邓珏，翁禾，阳龙. 分级加卸载下南海珊瑚泥一维固结长期变形试验及模型研究. 岩土力学. 2023(03): 685-696 . 百度学术
2.	陈信升，丁选明，蒋春勇，方华强，王成龙. 吹填珊瑚岛礁钙质软泥的渗透特性试验研究. 土木与环境工程学报(中英文). 2021(04): 58-66 . 百度学术
3.	王竞州，丁选明，蒋春勇，方华强. 钙质软土的真空预压与电渗固结室内试验研究. 岩土工程学报. 2021(S2): 36-40 . 本站查看