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。
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.
出处
《水电能源科学》
北大核心
2012年第6期66-69,共4页
Water Resources and Power
基金
教育部博士点基金资助项目(20090094110007)
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
piping
seepage deformation
forces on particles
critical hydraulic gradient
physical model
indoor test
