沥青混凝土心墙坝力学性能数值模拟研究

针对新疆某沥青混凝土心墙堆石坝进行了有限元数值模拟计算,坝体主应力和心墙轴线主应力比的计算结果表明:堆石体坝壳大、小主应力最大值均出现在坝底部中轴线两侧;满蓄期上游坝壳的大、小主应力比竣工期小;随着坝高的增加,沥青混凝土心墙的主应力比有增大趋势。根据计算结果对心墙的水力劈裂进行了判别,结果表明:心墙竖向应力均大于水压力,沥青混凝土心墙不会发生水力劈裂。

Simulative Study on Mechanical Properties of Asphalt Concrete Core Wall Dam

The paper had simulative calculation on an asphalt concrete core wall dam in Xinjiang and analyzed the results of principal stress of dam body and principal stress ratio of core wall axis.The results show that the maximum value of major and minor principal stress of rock-fill dam shell appear in the dam bottom of both sides of the axis;the major and minor principal stress of the upstream dam shell of full storage period are smaller than that of completion period;with increasing the height of the dam,the asphalt concrete core wall principal stress ratio has the trend of increase.The hydraulic fracturing of core wall is judged according to the calculated results.The results show that the vertical stress of core wall is greater than water pressure.Asphalt concrete core wall will not happen hydraulic fracturing.