小型拱坝抗滑稳定及坝体应力分析

拱坝坝肩岩体稳定是拱坝安全的根本保证,当拱坝坝肩岩体存在软弱结构面或坝肩岩体较软弱时,两岸坝肩岩体应进行抗滑稳定计算,且由于地质情况原因,有时需对坝肩体型进行局部修改,可能对坝身应力产生较大影响。文章主要介绍采用刚体极限平衡法计算坝肩稳定、拱梁分载法计算坝体应力的设计情况及坝端局部修改后坝身应力变化情况,为中低型拱坝的坝肩岩体稳定计算及坝身应力分析提供参考。

Analysis on Stability of Resisting Smooth and Strain of Small Type Arched Dam

Rock mass stability of arched dam shoulder is the basic guarantee of the dam safety.When weak structure face exists in rock mass of arched dam shoulder or rock mass itself is weak,stability of resisting smooth calculation of both banks dam shoulder's rock mass should be carried out.Because of geology conditions,sometime type of dam shoulder should be modified partly,which perhaps have great effects on dam body.This paper mainly introduces rigid body limit balance method to calculate dam shoulder stability,arched girder piece method to calculate strain design and changing condition of partly modified dam top,thus it gives references for the dam shoulder rock mass stability calculation and dam strain analysis of middle or low type arched dam.