摘要
白鹤滩双曲拱坝坝高289 m,坝址河谷地形、地质条件均存在较明显的不对称性,为研究这种不对称性条件对特高拱坝设计的影响,采用拱梁分载法、线弹性有限元和非线性有限元法对拱坝的应力变形特性、超载能力、拱坝破坏形式和抗震能力等进行了深入研究,并对目前已建和在建不对称性河谷中修建拱坝的几种设计思路进行了比较。建议白鹤滩拱坝的设计思路为:不做大规模的河谷改造,只进行常规的坝基开挖,在此基础上将拱坝坝身设计成不对称的体形,与不对称的坝址河谷条件相适应。
The height of Baihetan double curvature dam is 289 m. The topographical and geological conditions in the dam site are greatly uonsymmetrical. To study the influences of these nonsymmetrical conditions on the design of Baihetan dam, the arch cantilever trial-load method and linear elastic and nonlinear finite element methods were applied to analyze the stress and deformation, overload capacity, failure modes and seismic capacity of dam. The design ideas for other nonsymmetrical arch dams, which been completed or being constructed, were also compared herein. The idea of no largescale valley transformation and only conventional foundation excavation and with a nonsymmetrical shape adapted to the conditions of dam site is finally proposed for designing Baihetan arch dam.
出处
《水力发电》
北大核心
2011年第3期32-34,61,共4页
Water Power
关键词
非对称性
双曲拱坝
有限元法
拱梁分载法
白鹤滩水电站
asymmetry
double curvature arch dam
finite element method
arch cantilever trial-load method
BaihetanHydropower Station
