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堤（坝）基中浅层强透水层上覆砂层侵蚀试验与分析

王正成, 毛海涛, 王晓菊, 黄海均, 胡洪浩

王正成, 毛海涛, 王晓菊, 黄海均, 胡洪浩. 堤（坝）基中浅层强透水层上覆砂层侵蚀试验与分析[J]. 岩土工程学报, 2017, 39(z2): 244-248. DOI: 10.11779/CJGE2017S2059
引用本文: 王正成, 毛海涛, 王晓菊, 黄海均, 胡洪浩. 堤（坝）基中浅层强透水层上覆砂层侵蚀试验与分析[J]. 岩土工程学报, 2017, 39(z2): 244-248. DOI: 10.11779/CJGE2017S2059
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WANG Zheng-cheng, MAO Hai-tao, WANG Xiao-ju, HUANG Hai-jun, HU Hong-hao. Laboratory tests on erosion of overlying sand layer on shallow and strong permeable stratum in dike (dam) foundation[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(z2): 244-248. DOI: 10.11779/CJGE2017S2059
Citation: WANG Zheng-cheng, MAO Hai-tao, WANG Xiao-ju, HUANG Hai-jun, HU Hong-hao. Laboratory tests on erosion of overlying sand layer on shallow and strong permeable stratum in dike (dam) foundation[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(z2): 244-248. DOI: 10.11779/CJGE2017S2059
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堤（坝）基中浅层强透水层上覆砂层侵蚀试验与分析  English Version

  • 1. 重庆三峡学院土木工程学院,重庆 404100;
    2. 武汉大学水利水电学院,湖北 武汉430072;
    3. 河海大学环境学院,江苏 南京 210098;
    4. 新疆农业大学水利与土木工程学院,乌鲁木齐 新疆 830052

基金项目: 国家自然科学基金项目（51309262）; 重庆市科委基础与前沿研究计划项目（cstc2015jcyjA0300,cstc2015jcyjA00022）; 重庆市教委科学技术研究项目（KJ1601024）; 重庆三峡学院校企合作项目（15XQ01）
详细信息
    作者简介:

    王正成(1991- ),男,硕士,主要从事土石坝渗流机理研究。E-mail：wangzhengcheng194@163.com。

    通讯作者:

    毛海涛，E-mail：maohaitao1234@163.com

Laboratory tests on erosion of overlying sand layer on shallow and strong permeable stratum in dike (dam) foundation

  • 1. College of Civil Engineering, Chongqing Three Gorges University, Chongqing 404100, China;
    2. Institute of Water Conservancy and Hydroelectric Power, Wuhan University, Wuhan 430072, China;
    3. College of Environment, Hohai University, Najing 210098, China;
    4. College of Water Conservancy and Civil Engineering, Xinjiang Agriculture University, Xinjiang 830052, China

摘要

    摘要
  • 摘要: 堤（坝）基中往往存在局部浅层强透水层,其削减水头能力较弱,易发生管涌等侵蚀破坏,其破坏机理仍需深入探究。文中采用砂槽模拟堤（坝）基中浅层强透水层上覆砂层侵蚀情况,通过改变水位来观测堤（坝）基中砂土细颗粒流失现象,获取渗流量、渗透坡降、土体颗粒级配、锥头阻力等参数。试验表明,水位增至48 cm时浅层强透水层上覆砂层被“击穿”发生管涌破坏,破坏过程分为稳定渗流阶段、细颗粒流失阶段、较细颗粒流失阶段、管涌破坏扩大阶段。此外还发现,随着砂土中细颗粒砂土的流失,堤（坝）基的锥头阻力降低而发生沉降;细颗粒砂土流失导致其孔隙率和渗透系数增大,渗流场和应力场发生较大变化,研究成果能为堤（坝）基中浅层强透水层情况提供理论支撑。
    Abstract: There is local shallow and strong permeable stratum in dike (dam) foundation, and its head dissipating capacity is weak. It is easy to cause piping failure, and the failure mechanism still needs further studies. The erosion of overlying sand layer on shallow and strong permeable stratum in dike (dam) foundation is simulated by sand tank tests, by changing water block stages, observing phenomena of fine particle loss in sand, obtaining parameters of seepage discharge, seepage gradient, grain composition of soils and cone resistance. The test results show that piping failure occurs in the sand layer on shallow and strong permeable stratum when the water block stage increases to 48 cm. The failure process is divided into stages of steady seepage, internal erosion of fine particles, internal erosion of relative fine particles and piping failure expansion. Besides, the fine particles in sand are lost, the cone resistance of dike (dam) foundation decreases, and the foundation settles. The porosity and permeability coefficient of sand increase when the fine particles are lost, and the seepage and stress fields have great change. The reseach results may offer theoretical reference for dick (dam) foundation which contains shallow and strong permeable stratum.
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    • 参考文献(10)
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出版历程
  • 收稿日期:  2017-08-01
  • 发布日期:  2017-12-19

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