【摘要】 应用3Dσ软件对锦屏一级水电站左坝肩高边坡开挖过程进行三维有限元模拟,并对左坝肩缆机平台以上边坡和拱肩槽边坡的应力、位移情况进行详细的模拟。模拟结果表明:开挖坡面产生不同程度的张拉应力区域;缆机平台和拱肩槽槽坡底部产生一些竖直方向的回弹变形和水平向坡外的变形;5#梁山脊在拱肩槽开挖后将产生进一步的卸荷松弛,表层岩体稳定性将可能恶化,F42 9断层以上的大块岩体将是一个潜在的威胁,这些区域是逐级开挖过程中边坡支护设计的重点。更多还原

【Abstract】 A 3D-FEM analysis onhigh slope excavation at left bank abutment of Jinping stage Ihydropower station is carried out with a program 3D-σ,and stress and displacement of high slope is modeled in detail at spandrel groove and cable-crane platform of left abutment.The resultsshow that different degree of tensile stress zonesexist at top of slope surface after excavation;the rock mass deformation in the horizontal direction and vertical direction appear at the bottom of spandrel groove and the cable-crane platform;excavation of spandrel groove leads to unloading relaxation and deterioration of surface rock mass in the mountain No.5,and the large block above the fault F429 will be a potential threat,all the above will be the focal point of slope support at excavating step by step.更多还原