关于混凝土重力坝断面设计的探讨

Discussions on cross-section design of concrete gravity dam

简要综述了混凝土重力坝的溃坝问题,推导并分析了重力坝合理断面理论公式,简述了胶凝砂砾石坝采用等腰三角型断面、日本重力坝断面偏大以及上游采用折坡设计等原因,分析比较了200 m以上特高重力坝国内外设计的断面差别。基于分析,指出我国重力坝需基于观测进一步深化大坝抗滑稳定研究,对于200 m以上高坝,则需进一步深化设计准则的探讨。

The problems from failures of concrete gravity dam are briefly reviewed herein, and then the theoretical formula for the reasonable cross-section of gravity dam is derived and analyzed. Furthermore, the reasons why the isosceles triangular cross-sec- tion is adopted for the cement-sand-gravel dam and why the cross-secion of gravity dam in japan is a little bit too larger and its up- stream is designed with a fold-slope are illustrated, while the differences among the cross-sections designed for the super-high gravity dams with the heights over 200 m at home and abroad are comparatively analyzed. Based on the relevant analysis, it is pointed out that not only the study on the dam stability against sliding is necessary to be deepened in China, but the relevant de- sign criteria for the high dams with the heights over 200 m are also necessary to be deepened.