PRESSURE ROUNDED TUNNEL FOR HYDROELECTRIC POWER PLANTS Russian patent published in 2017 - IPC E02B9/06 

FIELD: construction.

SUBSTANCE: pressure rounded tunnel for hydroelectric power plants comprises the pit 3 with the angles and with the acquis in the tunnel rock and the tunnel lining 2 with expansion joints located opposite the corners in the form of longitudinal slots 5 with the seal 6 at the bottom of each slot. Bases of longitudinal slots 5 for joints are located in the outer layer of lining 2. The pit 3 lining and the surface of the concrete lining 2 contacting it with are made in cross section in the form of Reuleaux triangle with the corners 4, wherein one of corners 4 of Reuleaux triangle is oriented vertically upwards, forming a dome part of the pit 3. The expansion joints are located opposite all three corners 4 of Reuleaux triangle.

EFFECT: increase of strength, stability and reliability of performance of pressure tunnels of hydropower stations in critical geological and seismic conditions.

1 dwg