对龙滩碾压混凝土大坝断面设计的建议

Suggestion to Section Design of Longtan Roller-Compacted Concrete Dam(RCCD)

本文对龙滩电站碾压混凝土坝的断面设计计算，提出意见与建议：分别建基面的抗滑稳定与碾压混凝土层间稳定的区别；建议龙滩碾压混凝土的胶凝材料用量按不同高程上、中、下三个层次进行碾压混凝土级配选择；建议碾压混凝土的层间抗剪强度指标分别为上部、中部、底部不同指标进行控制；建议碾压混凝土的层间稳定计算，采用不同安全系数计算式。

The paper gives some suggestions to the calculation of section design of Long-tan RCCD,such as the difference between the stability againest sliding of datum level byseperate construction and the interlayer stability of RCC;the content of cementitious materi-al in graded RCC is decided by the upper , middle and lower level; the indexes of shearstrength of RCC are controlled by different indexes of tipper,middle and lower level, and thedifferent equation of safty factor is used in the calctilation of interlayer stability of RCC