【摘要】 在抗剪断理论的基础上采用非线性有限元分析方法,对某水电站导流隧洞堵头进行了三维有限元计算,并对堵头结构特征位置的应力、变形以及堵头整体的抗剪断安全系数等方面展开了深入分析。结果表明,25 m长度堵头部分可以满足初期封堵需要,45 m长度可以满足后期水库蓄水和封堵需要,分段封堵分期挡水方案是可行的。更多还原

【Abstract】 The stability of the diversion tunnel plug is important.The diversion tunnel plug of a hydropower station is analysed by the method of 3-D finite element on the basis of shear resistance theory.The stress and deformation of plug and the shear resistance coefficient are analyzed in detail. It has been shown that adopting 25 m-long plug and 45 m-long plug can meet the requirements in initial stage and later stage respectively.Obviously the stepped blocking programme is feasible.更多还原