深厚覆盖层条件下高拱坝坝身泄洪消能的布置方式研究

Study on the layout of flood discharge and energy dissipation of high arch dam within deep overburden layers

本文以某大型高拱坝工程为例,研究了深厚覆盖层条件下高拱坝坝身泄洪消能的布置方式,提出了以"护坡不护底、不设二道坝、部分预挖覆盖层"取代传统的"水垫塘+二道坝"泄洪消能布置方案的设想,并进行了水工模型试验研究,初步论证了上述方案的可行性。本文的研究成果可供国内类似工程参考。

This paper investigates the layout scheme of flood release works and energy dissipation of high arch dams within deep overburden layers through scale-model tests conducted for a practical large-size high dam as a study case. By the new scheme proposed in this paper,only the slopes need be protected by lining technique,while the protection of scour pool bottom and the secondary dam that are adopted traditionally,are eliminated. The feasibility of this new idea is verified by the results of our model tests,which provides a reference to the design of similar dams in China.