Rock foundation core wall earth-rock dam under dam emptying pipe laying device

Abstract

The invention provides a rock foundation core wall earth-rock dam under dam emptying pipe laying device. The device comprises an inlet elevation, an inlet section, a core wall front base rock pipe laying section, a core wall bottom section, a core wall rear base rock pipe laying section, an overhaul valve, an energy dissipation valve, a valve chamber and a core wall earth-rock dam, wherein the inlet elevation is located at the bottom of the core wall earth-rock dam, the core wall bottom section is located in the middle of the bottom of the core wall earth-rock dam, the core wall front base rock pipe laying section and the core wall rear base rock pipe laying section are located on two sides of the core wall bottom section correspondingly, the core wall front base rock pipe laying section is connected with the inlet section, the core wall rear base rock pipe laying section is connected with the valve chamber through the overhaul valve, and the energy dissipation valve is arranged between the overhaul valve and the valve chamber. According to the device, the conical energy dissipation valve is adopted at the downstream, the energy dissipation work is simplified, and the energy dissipation problem is more effectively solved.

Description

technical field [0001] The invention belongs to the field of water conservancy and hydropower engineering, and in particular relates to a device for venting buried pipes under an earth-rock dam with a core wall of a rock foundation. Background technique [0002] In the construction of water conservancy and hydropower projects, the use of core wall earth-rock dams is one of the commonly used dam types. In order to ensure project safety, it is often necessary to build empty buildings. In some special cases, the reservoir water is emptied by emptying buildings. Traditional The technology generally adopts the construction of vent tunnels on both sides of the bank. Since the vent tunnel inlet is located below the dead water level of the reservoir, the tunnel generally needs to be equipped with a pressure short pipe inlet at the inlet to convert the pressurized flow into a non-pressurized flow and then enter the non-pressure section. The tunnel exit Downstream energy dissipators a...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the existing problem that the integrity of the anti-seepage body cannot be guaranteed, and if it is not handled properly, it is easy to cause piping damage along the outside of the pipeline. Shaped energy dissipation valve technology simplifies the energy dissipation process, more effectively solves the energy dissipation problem, avoids the construction risk of the tunnel scheme, reduces the project cost, and speeds up the progress

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