摘要
锦屏一级水电站高拱坝的高特大垫座高155 m,采用多重网格法,对垫座的可能滑动面进行搜索,分别计算滑块1-12在分期填筑、正常蓄水位等工况下的抗滑安全系数。计算结果表明,垫座分期填筑时,抗滑安全系数的变化范围为1.71~2.33;正常蓄水位时,由于拱肩推力作用,垫座抗滑安全系数有所提高,抗滑安全系数上升为1.91-2.65,满足稳定性要求。
The Exceptionally large foundation cushion for the high arch dam of Jinping 1 hydropower project is 155m in height.The multiple lattice method was used to search for any potential slide plane and to calculate safety factors against sliding of No.1-No.12 sliding blocks,which were concreted in stages and under the normal storage level respectively.The calculation results indicate that the safety factor against sliding of the foundation cushion varies from 1-71 to 2.33 when it is concreted in stages while that under the normal storage level increases to 1.91 - 2.65 thanks to thrust action of the spandrels, satisfying the stability requirement.
出处
《云南水力发电》
2009年第5期23-26,29,共5页
Yunnan Water Power
关键词
拱坝
垫座
多重网格法
稳定性
arch dam
foundation cushion
multiple lattice method
stability
