Combined type flip-drop flow nose ridge suitable for narrow and deep river valley: Fid-Bau Portal

Combined type flip-drop flow nose ridge suitable for narrow and deep river valley

ZHANG JIANMIN / PAN JIANGYANG / WANG HANG / WANG QINGXIANG / LEI GANG / WANG BO

The invention discloses a combined type flip-drop flow nose ridge suitable for a narrow and deep river valley. The combined type flip-drop flow nose ridge comprises a flood discharge tunnel outlet section, a water guide side wall and a combined type twisted curve bottom plate, wherein the water guide side wall is connected with a right side wall of the flood discharge tunnel outlet section in thedownstream direction; the starting end of the combined type twisted curve bottom plate is the upstream end of a bottom plate of the flood discharge tunnel outlet section, and the tail end of the combined type twisted curve bottom plate is located outside the flood discharge tunnel outlet section and is in a broken line shape formed by a first line segment and a second line segment; the combined type twisted curve bottom plate is divided into a left side bottom plate body and a right side bottom plate body with the axis of the bottom plate of a flood discharge tunnel as the boundary; the left side bottom plate body is a downwards-inclined face; the right side bottom plate body is composed of two tangent upwards-raised arc faces; one end of the side line, located outside the flood dischargetunnel outlet section, of the left side bottom plate body is connected with the end point of the second line segment, and the other end of the side line, located outside the flood discharge tunnel outlet section, of the left side bottom plate body is connected with the free end of a third line segment which is parallel to the second line segment and connected with a left side wall of the flood discharge tunnel outlet section in the downstream direction; and a water outlet is formed by the broken line-shaped tail end of the combined type twisted curve bottom plate and the outer side of the leftside bottom plate body located outside the flood discharge tunnel outlet section.

本发明所述适用于窄深河谷的复合式挑跌流鼻坎，包括泄洪洞出口段、与泄洪洞出口段顺水流方向右侧边墙衔接的导水边墙和复合式扭曲折线底板；所述复合式扭曲折线底板的起始端为泄洪洞出口段底板的上游端，末端位于泄洪洞出口段之外且为由第一线段、第二线段形成的折线形，且以泄洪洞底板的轴线为界分为左侧底板和右侧底板，左侧底板为下倾的斜面，右侧底板由两段相切的上扬弧面构成，位于泄洪洞出口段之外的左侧底板边线一端与所述第二线段的端点相接，另一端与平行于第二线段且与泄洪洞出口段顺水流方向左侧边墙相接的第三线段自由端相接，所述复合式扭曲折线底板的折线形末端和位于泄洪洞出口段之外的左侧底板外侧形成出水口。

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