龙滩碾压混凝土坝渗流场对应力场的影响

摘要

The characteristic of seepage through dam body and layers in Longtan roller compacted concrete dam(RCCD)is analyzed, the hydrostatic and hydrodynamic seepage pressures in RCCD and their effects on stress in the dam are also presented. From the seepage-influenced stress distribution in the dam computed by finite element method, it can be shown that the maximum values of stress components increase and the stress concentration in dam heel is more obvious because of the action of hydrostatic and hydrodynamic seepage pressures.%结合龙滩水电站工程，分析碾压混凝土重力坝坝体及碾压层(缝)面渗流的特点，提出碾压混凝土坝渗流的渗透静水压力和渗透动水压力及其对坝体应力的影响机理，采用有限元数值方法计算出渗流场影响下的龙滩坝应力场分布。可以看出，由于渗透静水压力和渗透动水压力的作用，使坝体各应力分量最大值增大，也使坝踵处应力集中现象加剧。