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为考察西南地区某土石坝加宽培厚后坝体的真实工作性态和安全状况,采用三维有限元方法分析了土石坝坝体加宽培厚及蓄水运行时坝体位移、防渗心墙应力与等效塑性应变区域的变化规律。结果表明,坝体沉降最大值发生在加宽培厚土层区域,且坝体出现了向上游与向下游的水平位移,下游贴坡式加宽培厚方式使坝体防渗心墙出现了拉应力与较大区域的等效塑性应变范围,坝体加宽培厚后,需进一步判定坝体培厚土层的稳定性以及心墙的屈服情况与防渗性能。研究成果可供类似工程参考。
In order to investigate the actual working behavior and safety status of an earth-rock dam in southwestern China after widening and thickening, the three-dimensional finite element method Wall Stress and Equivalent Plastic Strain Variation. The results show that the maximum settlement of the dam body occurs in the area of widening thick soil layer and the horizontal displacement of the dam body appears upstream and downstream. The equivalent plastic strain range of tensile stress and large area should be further determined after the dam body is broadened and thickened. The stability of the dam body and the yield and impermeability of the core wall should be further determined. Research results for similar projects for reference.