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Hardfill坝由于坝体剖面常采用等腰梯形,其坝基面上的应力分布与常规混凝土重力坝有很大差别。在自重荷载情况下,沿坝基面上的竖直向应力近似服从二次抛物线分布f(x)=ax2+b,对称轴为坝基中线,将其沿坝基面积分,所得结果理论上应与坝体自重相等。对不同坝高和坝体密度情况进行分析,并与有限元计算结果进行比较,对误差较大的区域进行修正,并得到一定的规律。使得对于Hardfill坝在自重荷载作用下,坝基面竖向应力的理论计算可以达到较高的精度。对理论和工程实践都具有一定的意义。
Hardfill dam as the dam is often used isosceles trapezoidal profile, the dam foundation surface stress distribution and conventional concrete gravity dam are very different. Under self-weight load, the vertical stress along the dam base approximately obeys the second-order parabola distribution f (x) = ax2 + b. The symmetry axis is the dam foundation line, Body weight equal. The different dam height and the density of the dam body are analyzed, and compared with the finite element calculation results, the error area is corrected and some laws are obtained. Which makes the theoretical calculation of vertical stress on dam foundation achieve high accuracy for Hardfill dam under self-weight load. Both theory and engineering practice has a certain significance.