Abstract: The horizontal layer is the key part that affects the strength, stability and seepage of a RCC dam. For a RCC gravity dam with high seepage pressure during operation period, combined with the measured values of seepage pressure in dam body, the anti-sliding stability on dam layer is reviewed by use of material mechanics method and current industry standard Design Specification for Concrete Gravity Dams. The calculation results show that for the RCC dam with a small dam height, the seepage pressure on dam layer has little influence on the anti-sliding stability, and the redundancy of anti-sliding stability is high.

Key words: RCC dam, seepage pressure on layer, on-site inspection, anti-sliding stability

摘要： 碾压混凝土坝的水平层面是影响碾压混凝土坝强度、稳定和渗流的关键部位。针对某运行期坝体渗透压力较大的碾压混凝土重力坝，结合坝体渗透压力实测值，采用材料力学法和现行业规范NB/T 35026-2014《混凝土重力坝设计规范》对坝体层面抗滑稳定进行复核。计算结果表明，对于坝高较小的碾压混凝土坝，坝体层面渗压对坝体层面抗滑稳定影响较小，坝体抗滑稳定的富裕度较高。

关键词: 碾压混凝土坝, 层面渗压, 现场检查, 抗滑稳定