摘要
以瀑布沟水电站大坝坝基防渗墙为例,根据蓄水期观测数据,结合监测仪器布置对其应力变形特征进行分析,并对其机理进行探讨。变形(挠度)主要与水平压力有关,防渗墙应变主要与所受的竖向荷载有关,墙体与两侧覆盖层间的不均匀沉降所产生的摩阻力对其应变空间分布特征具有较大影响。
Taking dam foundation cut-off wall of Pubugou Hydropower Station as an example, combining observed data during storage period and the layout of monitoring instruments, the stress and deformation characteristics are analyzed and the mechanism is discussed. The deflection deformation is mainly related to horizontal pressure, and the stresses of Cut-off wall are primarily relevant to its vertical loads. The distribution characteristic of strain space in the cut-off wall is greatly influenced by the frictional resistance caused by the differential settlement between the wall and the two sides o-verburdens.
出处
《水电与新能源》
2012年第6期40-42,共3页
Hydropower and New Energy
关键词
防渗墙
应力变形
机理
灌浆压力
摩阻力
cut-off wall
stress deformation
mechanism
grouting pressure
frictional resistance
