Structure and layout method of curved gate lock chamber for diversion tunnel rebuilt into ecological water discharge tunnel

Abstract

The invention discloses an arc-shaped gate chamber structure and arrangement method for diversion tunnel reconstruction into an ecological water discharge tunnel; it includes a diversion tunnel reconstruction body (1), and the arc-shaped gate chamber (2) is closely attached to the diversion tunnel. Downstream of the tunnel reconstruction body (1), side walls (4) are poured on both sides of the arc-shaped gate chamber (2), and consolidation grouting holes (10) are arranged around the arc-shaped gate chamber (2) ; a diffusion pier (5) is arranged below the arc gate chamber (2); the arc gate chamber (2) includes an operating chamber (9) in the middle and a base plate (3) at the bottom; An arc gate support (6) is poured under the operating room (9), and an arc gate (7) with controllable opening is arranged on the arc gate support (6); it overcomes It overcomes the shortcomings of arc gates in the prior art that the gates are unstable under the condition of large thrust and high uplift pressure level, and solves the problems of continuous flow during the storage period of the reservoir, large flow of water release, high water head and dynamic water closing of the plane gate of the diversion tunnel Difficult advantages.

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. There is no precedent

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