摘要
对比分析了水平拱圈坝肩不同滑动面渗透系数对滑动面节点水头的影响,研究了作用在水平拱圈坝肩滑面上的扬压力和作用在滑块上的渗流体积力之间的关系。同时,对比分析了扬压力作为面力作用在坝肩滑面上,以及作为渗流体积力作用在坝肩滑块上对坝肩应力的影响。分析结果表明,当滑动面的渗透性较弱时,滑动面上的水头衰减速度很快;当滑动面的渗透性很强时,滑动面上的水头逐渐趋近于直线衰减;扬压力作为面荷载和作为渗流体荷载的作用力近似相等,但不一定会引起相近的效应量。
The influence of the permeability coefficient of different sliding surfaces in horizontal arch ring abutment on the water head of different nodes on sliding surface are compared, and the relationship between the uplift pressures that act on the sliding surfaces of horizontal arch ring abutment and the seepage volume forces that act on sliding blocks is researched. At the same time, the abutment stresses under two force conditions are also compared, in which, one condition is that the uplift force acts on sliding surface of abutment and other is that the seepage volume force acts on sliding block of abutment. The results show that, （a） the water head on sliding surface attenuates faster when the permeability of sliding surface is weaker, （b） the attenuation trend of water head on sliding surface is gradually closed to straight when the permeability of sliding surface is very strong, and （e） the uplift pressure has a approximate equal force when as surface load on sliding surface and as seepage body load in sliding block, but will not necessarily cause similar effects on displacement and stress.
出处
《水力发电》
北大核心
2012年第10期40-42,共3页
Water Power
基金
国家杰出青年基金(50925933)
国家自然科学青年基金(51209124)
湖北省教育厅科学技术项目(D20101207)
关键词
坝肩
滑动面
滑块
扬压力
渗流体积力
dam abutment
sliding surface
slide block
uplift pressure
seepage volume force
