溢流面板堆石坝泄槽底板稳定及结构应力分析

Analysis on stability and structural stress of chute bottom slab of overflow concrete faced rock-fill dam

基于推导的泄槽底板抗滑稳定安全系数计算式,运用正交设计的直观分析法进行底板稳定性敏感性分析,结果表明阻滑板长度、底板长度和溢流平均速度是影响底板稳定的重要因素.从底板的抗滑稳定角度,分析及计算底板最大允许流速范围为15.33～40.67m/s.最后以实际工程为例,分析了泄槽底板在单一阻滑板加固作用下的抗滑稳定性以及阻滑板与底板的应力.

On the basis of the derived calculation formula for the anti-sliding safety coefficient of chute bottom slab,the sensitivity analysis of bottom slab stability was performed using the intuitive analysis method with orthogonal design,which indicated that the lengths of anti-sliding plate and bottom slab,and the overflow average velocity are the main factors to affect the stability.From the perspective of anti-sliding stability,the maximum allowable flow velocity of the bottom slab was about 15.33～ 40.67 m/s.Based on one practical project,the anti-sliding stability of chute bottom slab and the stress between the anti-sliding plate and bottom slab were investigated under the reinforcement effect of single anti-sliding plate.