【摘要】 300 m级拱坝坝高、库大、应力水平高、施工运行期工作性态复杂,《混凝土拱坝设计规范》(DL/T 5346—2006)(以下简称《规范》)的分析方法和安全系数能否涵盖所有安全风险,存在疑问;《规范》要求,坝高大于200 m的拱坝,应对上述有关问题进行专门论证。结合笔者所在团队十余年来跟踪小湾、锦屏一级、溪洛渡、拉西瓦等特高拱坝建设全过程开展的科研工作,对特高拱坝结构研究的经验类比方法、应力分析方法、稳定分析方法、抗震安全分析方法的基本概念、工程应用、主要优缺点和发展趋势进行阐述和分析,结合不同设计阶段的目标和资料细化程度,提出了特高拱坝可行性研究设计、招标设计、施工图设计、蓄水与运行等不同阶段应该开展的分析工作以及建议采用的分析方法,也可为一般拱坝的设计提供参考。更多还原

【Abstract】 As the 300 m-grade arch dams have the characteristics of high dam height, large reservoir size, high stress level, of which the working performances during their operation periods are complicated, it is still in doubt whether the analysis methods and safety factors specified in "Design Specification for Concrete Arch Dams"(DL/T 5346—2006) can cover all the safety risks or not, and then a special demonstration is made for dealing with the relevant problems mentioned above. In combination with the tracking scientific and technical studies made on the whole construction processes of the super-high arch dams for Xiaowan, Jinping I, Xiluodu, Laxiwa Hydropower Stations, etc., the basic conceptions, engineering applications, main merits and defects and development trends of the method of analogy of experience, stress analysis method, stability analysis method and seismic safety analysis method for the study on super-high arch dam are expounded and analyzed, while the analyses which are necessary to be made during the different phases of super-high arch dam, i.e. design for the feasibility study, bidding design, construction drawing design, impoundment, operation,etc. as well as the suggested analysis methods are put forward herein in accordance with the targets of different design phases and the data refinement degree; which can also provide some references for the design of the common arch dam.更多还原