| 细砂管涌破坏试验及渗透变形分析 |
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| 引用本文： | 许波琴,陈建生,梁〓越.细砂管涌破坏试验及渗透变形分析[J].水电能源科学,2012,30(6):66-69. |
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| 作者姓名： | 许波琴 陈建生 梁〓越 |
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| 作者单位： | 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;河海大学 岩土工程研究所,江苏南京210098 |
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| 基金项目： | 教育部博士点基金资助项目（20090094110007） |
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| 摘 要： | 建立颗粒孔隙通道物理模型对渗流场中的颗粒进行力和力矩的平衡分析,以判断颗粒的运动状态;通过室内方形玻璃槽渗透破坏试验,从细观角度观察颗粒的起动和移动轨迹,通过各级水头下流量的变化、渗漏通道发展过程中涌砂量的变化、流速随水力梯度的变化及孔隙水应力的变化对颗粒迁移、渗漏通道发展过程的影响进行了分析,并将临界水力梯度的理论值与试验值进行比较,两者吻合度较高。
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| 关 键 词： | 管涌 渗透变形 颗粒受力 临界水力梯度 物理模型 室内试验 |
Damage Test of Fine Sand Piping and Seepage Deformation Analysis |
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| XU Boqin,CHEN Jiansheng and LIANG Yue.Damage Test of Fine Sand Piping and Seepage Deformation Analysis[J].International Journal Hydroelectric Energy,2012,30(6):66-69. |
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| Authors: | XU Boqin CHEN Jiansheng and LIANG Yue |
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| Affiliation: | 1,2(1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;2.Geotechnical Research Institute,Hohai University,Nanjing 210098,China) |
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| Abstract: | The physical model of pore channels is established to analyze the balance of forces and moment of particles in seepage filed so that the movement of particles is determined. From the microscopic point of view, the movement starting of the particles and the trajectory are observed through seepage damage test of indoor square glass flume. And then it analyzes the impact of migration of particles and leakage channel development process caused by the flow change with water head change, the sand production rate in development of leakage channel, velocity change with the variation of hydraulic gradient and the change of pore water stress. Comparison of the theoretical value of critical hydraulic gradient and the experimental value, the results show that the goodness of fit is high. |
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| Keywords: | piping seepage deformation forces on particles critical hydraulic gradient physical model indoor test |
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