百色水利枢纽重力坝稳定和应力分析

Stability and Stress Analysis for the Gravity Dam of Baise Project

百色水利枢纽重力坝RCC由采用灰岩骨料改为采用辉绿岩骨料 ,重度由 2 4kN/m3增加到 2 5kN/m3。非溢流坝段坝顶宽由 1 2m改为 1 0m ,下游面坡率由 1∶0 .77改为 1∶0 .75。同等荷载组合条件下对最高坝块的稳定和应力应变分析研究成果表明 ,修改后的坝断面抗滑稳定安全系数略有提高 ,应力状况仍然良好 ,尚可较原来减少2 .8%的断面面积和 2 .2 2 %的坝底宽度以及相应的坝体混凝土量和坝基开挖量。

The stability and stress of two sections for the gravity dam of Baise project are analyzed with the method of material mechanics,the finite element method and the equivalent method of material mechanics. The results indicate that the modified dam section is safe and economical,and the upstream slope of the section is required or else the area of the dam section increase 6.34%.