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岳城水库土坝采用了上游压坡铺盖加固的方法,以防止坝体动力和静力坍滑。本文对该坝的有压坡铺盖断面和无压坡铺盖断面进行了大量的非线性静力计算和动力计算。静力计算采用应力和渗流一并考虑的计算方法,并考虑水位骤降的影响。动力计算采用非线性的二维有效应力方法。计算中都用等参数单元。文中分析比较了两个断面的静应力、流网、静力稳定安全系数、加速度反应曲线、剪应力反应曲线,最大动剪应力和动剪应变,振动孔隙水压力的分布、振动残余变形、残余位移、动力稳定系数等等。 分析指出,压坡铺盖加周措施对该坝是有效果的。
The Yuecheng Reservoir earth dam adopts the method of upstream pressure slope covering and reinforcement to prevent dam body static and dynamic sliding. In this paper, a large number of nonlinear static calculations and dynamic calculations are performed on the pressure-slope-covered section and the unstressed-slope-covered section of the dam. The static calculation uses the calculation method of stress and seepage, and considers the effect of the sudden drop of water level. The dynamic calculation uses a nonlinear two-dimensional effective stress method. All parameters are used in the calculation. This paper analyzes and compares the static stress, flow network, static stability safety factor, acceleration response curve, shear stress response curve, maximum dynamic shear stress and dynamic shear strain of two sections, distribution of vibration pore water pressure, residual vibration deformation, residual Displacement, dynamic stability and so on. The analysis pointed out that the slope-surfacing plus weekly measures are effective for the dam.