Radial gate and gate chamber structure of ecological drainage tunnel reconstructed from diversion tunnel and arrangement method

Abstract

The invention discloses a radial gate and gate chamber structure of an ecological drainage tunnel reconstructed from a diversion tunnel and an arrangement method. The radial gate and gate chamber structure comprises a diversion tunnel reconstruction body (1), wherein a radial gate chamber (2) is closely attached to the downstream position of the diversion tunnel reconstruction body (1), side walls (4) are arranged on the two sides of the radial gate chamber (2) in a poured mode, and the periphery of the radial gate chamber (2) is provided with consolidation grouting holes (10); a spread pier (5) is arranged below the radial gate chamber (2); the radial gate chamber (2) comprises an operation room (9) in the middle and a bottom plate (3) at the bottom; a radial gate supporting body (6) is arranged below the operation room (9) in a poured mode, and a radial gate (7) with a controllable opening degree is arranged on the radial gate supporting body (6). The radial gate and gate chamber structure overcomes the defect that in the prior art, a gate chamber is unstable on the conditions of large radial gate thrust and high uplift pressure, and has the advantages of solving the problems of continuous streams in a reservoir storage period, a large volume of drainage and gate closing difficulty caused by dynamic water at a high water head of a plane gate of the diversion tunnel.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering construction diversion, and more specifically relates to the structure and arrangement method of an arc-shaped gate lock chamber for rebuilding an ecological water discharge tunnel from a diversion tunnel. Background technique [0002] 1. At present, the working conditions of diversion tunnel gate openings and chamber working conditions at home and abroad; high dams are built in high mountain and valley areas, and the diversion method of cofferdams blocking the river bed and diversion tunnel discharge is usually used in the early stage of construction diversion. , take the diversion mode of the temporary diversion bottom hole of the dam body and the diversion tunnel on the bank. The diversion tunnel is generally sealed by the lower gate of the imported flat gate. The chamber of the flat gate is arranged at the tunnel entrance. The water thrust of the chamber is...

AI Technical Summary

Problems solved by technology

[0010] (1) The lining of the diversion tunnel has strong water permeability. After the lower gate is closed, the water head is high, generally exceeding 150m.

[0011] (2) The diversion tunnel is rebuilt into an ecological water discharge tunnel. The excavation section of the gate chamber is the same size as the tunnel section. The thrust of the arc gate cannot be transmitted to the mountain in the form of positive pressure, but can only be transmitted to the mountain through the friction and cohesion of the bottom plate , the anti-sliding stability condition of the lock chamber is poor;

[0012] (3) The installation and operation of arc gates have high space requirements, while the stability of the gate chamber requires heavy concrete pressure, and the two are contradictory

[0013] To sum up, when the high dam diversion tunnel is rebuilt into an ecological water discharge tunnel and sealed with arc gates, the working conditions of arc gate lock chambers are complicated, and the design technology is difficult, and there is no precedent

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