普定碾压混凝土拱坝布置和结构设计

普定碾压混凝土拱坝筑坝新技术研究是国家重点科技攻关项目专题之一。依托这一成果建成的普定碾压混凝拱坝，采用坝身泄洪，整体式坝体结构，不设施工缝，仅在溢洪道两侧各设一诱导缝，以减小施工干扰，限制坝体裂缝，加快施工进度；采用碾压混凝土自身防渗，挡水运行表明坝体无渗水，完全达到设计要求，拱坝基础垫层采用外掺ＭｇＯ常态混凝土，结果垫层混凝土的施工缝一直处于受压状态，避免了裂缝的产生。普定碾压混凝土拱 坝和结

Layout and structural design or the Puding RCC Arch Dam

The study on new techniques of the Puding RCC Arch Dam is one of the national important key programs of science and technology. The Puding RCC Arch Dam which was built on the basis of the study's results has the folio lowing design features: flood discharge on the dam body, monolithic dam structure, without any construction joint, induced joints made on the either side of the spillway, so as to reduce the interference of construction and to control the development of crack on the dam and to speed up the construction; seepage control by RCC itself which has been shown successful by the facts that no seepage through the dam has been found during the operation of dam retaining and that the design requirements have all been met; the conventional concrete with MgO used for the foundation bed to make the construction joint of the bed concrete compressed and then to avoid the development of crack. Layout and sturctural design of Puding RCC arch dam are successful.