Extra-high water head plane sliding emergency gate groove structure

Abstract

The invention discloses an extra-high water head plane sliding emergency gate groove structure which comprises a bottom sill (2) located at the bottom between two gate piers (1). The two ends of the bottom sill (2) are connected with a gate groove (3), the upper portion of the bottom sill (2) is provided with a drainage hole (4), the two gate piers (1) above the drainage hole (4) are connected through an upstream breast wall (5) and a downstream breast wall (6), an all-steel lining structure is adopted within a 1.5-2 times orifice height range from the gate groove to the bottom sill, all corners of the gate groove are of a fillet structure, and three stages of inclined plane steps deviated towards the upstream part are arranged on the upstream surface of the downstream breast wall from top to bottom. Hydraulics conditions of the gate groove are improved, and cavitation erosion of the gate groove is reduced; a water column force can continuously act on a gate to be favorable for closing the gate safely. The integral steel lining structure is adopted, and the cavitation erosion inside the gate groove is avoided. The upstream face of the outer edge of the upper portion of a main rail is provided with an L-shaped notch, and the sliding-down wearing capacity of a gate water seal can be effectively reduced.

Description

technical field [0001] The invention relates to a gate groove structure for an extra-high water head plane sliding accident, belonging to the technical field of metal structures of water conservancy and hydropower projects. Background technique [0002] Plane sliding accident gates generally use water column dynamic water to close the door. Because the formation of water column is related to the shape of the door groove, considering the safety of closing the door, it is usually used for water inlet accidents or fast gates with low flow rates. In recent years, due to the increasing scale of plane fixed wheel and plane sprocket gates used for sluice sluice holes, the water pressure has also increased, and the plane fixed wheel and plane sprocket gates usually adopt the upstream water-stop type, which makes When the gate is in the water-retaining state, the upstream breast wall bears a lot of water pressure, the breast wall thickness is relatively large, and the investment in c...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a super-high water head planar sliding accident gate groove structure to solve the problem that the existing traditional Type II gate groove and water column closed gate groove are complex in mechanics and prone to cavitation cavitation, and the water column may not be able to effectively form and cannot be closed. During the closing process of doors and gates, the high-speed water flow surging in the door slot washes away the second-stage concrete of the door slot lintel and the second-stage concrete of the bottom sill of the door slot.

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