碾压混凝土工拱坝诱导缝断裂特性研究

Study on penetrative induced slot fracture performance of roller compacted concrete arch dam

为了防止碾压混凝土坝出现无规则裂缝,通常采用在碾压混凝土坝体特别是在碾压混凝土拱坝的内部设置诱导缝,通过对带有穿透形预留缝的碾压混凝土试件和内含椭圆形预留缝、内含矩形预留缝的碾压混凝土试件的轴拉试验和分析得出了关于内含非穿透椭圆形预留缝碾压混凝土试件和内含非穿透矩形预留缝碾压混凝土试件的应力强度因子的计算公式并进行了修正,取得了较好的结果。

In order to prevent from causing the random crack in the rolling concrete dam, installing the induction crack is often adopted in the rolling concrete dam especially in the internal of the rolling concrete dam. Through the axis-pulling experiments and the analysis of the rolling concrete sample having the penetrating crack, the ellipse crack and the rectangle crack, the calculation formulas is obtained of the stress intensity factor respect to the rolling concrete sample having the ellipse crack and the rectangle crack and the formulas is also revised. It gains good results.