CAJ | 학술논문

锦屏一级水电站大奔流料场高边坡断层及结构面发育，开挖高度巨大，边坡变形特征及破坏机制十分复杂。在工程地质分析的基础上，采用数值计算，分析了边坡变形特征、破坏机制，评价了边坡稳定性。研究表明：边坡开挖变形以卸荷回弹为主，竖向变形大于水平变形，层间错动带及陡倾断层错动变形较大；浅部的层间错动面多处于剪切极限状态和不连续张开状态；边坡局部存在塑性破坏区，主要分布于薄层砂板岩、剪切错动带及坡体浅表，以拉伸破坏为主，少量剪切破坏；边坡潜在破坏机制为溃屈破坏。开挖后的边坡安全系数满足规范要求。
금병일급수전참대분류료장고변파단층급결구면발육，개알고도거대，변파변형특정급파배궤제십분복잡。재공정지질분석적기출상，채용수치계산，분석료변파변형특정、파배궤제，평개료변파은정성。연구표명：변파개알변형이사하회탄위주，수향변형대우수평변형，층간착동대급두경단층착동변형교대；천부적층간착동면다처우전절겁한상태화불련속장개상태；변파국부존재소성파배구，주요분포우박층사판암、전절착동대급파체천표，이랍신파배위주，소량전절파배；변파잠재파배궤제위궤굴파배。개알후적변파안전계수만족규범요구。
Due to developed faults and structural planes and huge excavation height,the deformation and failure mechanisms of the high slope at Dabenliugou quarry of Jinping-ⅠHydropower Station are complicated.On the basis of engineering geological analysis,we analysed the deformation features and failure mechanism of the slope,and as-sessed the slope’s stability through numerical calculations.Results showed that:1)unloading rebound is the major form of slope deformation,and vertical deformation is greater than horizontal deformation,the sliding deformations of interlayer staggered surface and steep dip fault are large,and shallow interlayer staggered surface is mostly in shear limit state and discontinuous opening state;2)partial plastic zone (largely in tensile failure and a bit shear failure)mainly distributes in thin sandy slate,interlayer shear zone and the slope’s shallow surface;3)the failure mechanism of high slope of Dabenliugou quarry is buckling failure;4)the safety factor of slope after excavation meets standard requirements.