论文部分内容阅读
心墙堆石坝坝基混凝土垫板应力值较高,垫板有可能开裂而导致心墙与垫板接触渗流破坏。以高261.5m的糯扎渡土质心墙堆石坝为模型,通过三维有限元计算分析,研究了高心墙堆石坝混凝土垫板的受力机理、应力分布规律及合理的分缝方式,得出垫板在顺坝轴线方向总体处于压应力状态而在垂直于坝轴线方向会出现明显拉应力,由此提出在反滤层与心墙交界部位及在顺坝轴线方向主动设置结构纵缝的工程措施,从而大幅降低垫板拉应力,避免了垫板开裂。
Core wall rockfill dam dam foundation concrete slab stress higher, the cushion may be cracking caused by the contact between the heart wall and the pad seepage damage. Based on the model of the Nuozhadu earth core rockfill dam with a height of 261.5 m, the stress mechanism and stress distribution of the concrete core slab in high core rockfill dam are studied by means of three-dimensional finite element analysis. It is concluded that the cushion plate is under compressive stress in the direction of the axis along the dam and obvious tensile stress occurs in the direction perpendicular to the axis of the dam. Therefore, it is proposed that the structural longitudinal seam be provided actively at the interface between the filter layer and the core wall and along the axial direction of the dam Engineering measures, which greatly reduce the tensile stress plate, to avoid the plate cracking.