by HAO Yong, HE Hong'en. Study and application of the flat insulation gate in the non-pressure discharge-tunnel with large section at high altitude and cold area[J]. 2025, 0(2).
by HAO Yong, HE Hong'en. Study and application of the flat insulation gate in the non-pressure discharge-tunnel with large section at high altitude and cold area[J]. 2025, 0(2).DOI:
The Jiudianxia water conservancy project is located in the high altitude and cold area. Its dis⁃ charge tunnel on the left bank is easy to freeze due to the low temperature and the wind through tunnel. The durability of lining concrete in the tunnel is seriously damaged by the freeze-thaw cycle
which af⁃ fects the service life of the tunnel. This paper puts forward a design scheme of installing flat insulation gate at the opening of underground tunnel to solve the problems of seepage water freezing and cyclic freeze-thaw damage to the lining concrete.