POWERCHINA's project team celebrates the breakthrough of the 9,490-meter-long headrace tunnel for the Upper Trishuli-1 hydroelectric Project.
The headrace tunnel for the Upper Trishuli-1 Hydroelectric Project in Nepal, constructed by POWERCHINA, was fully connected on Oct 25, providing a guaranteesolid foundation for the power station's commissioningoperation and electricity generation.
This run-of-river hydropower station, with a 216 MW capacity and an estimated annual output of 1.46 billion kWh, will significantly alleviate power shortages and boost economic growth in the region.
The 9,490-meter diversion tunnel, with its 7.5-meter horseshoe-shaped cross-section, presented significant construction challenges due to its length and unfavorable geological conditions.
To ensure efficientsmooth tunnel construction, the project team independentlydeveloped three originalconstruction methods, securedand obtained eight utility model patents, and. Their quality control (QC) achievementsearned two major awardsfor their quality control innovations.
Four, and four engineering andtechnical papers were alsopublished, reflecting POWERCHINA'sdemonstrating PowerChina's technical strengthexpertise and innovation capabilities for constructionin overseas projects under complex geological conditionsoverseas.
Despite challenges like. Through the persistent efforts of all personnel involved, major difficulties such as fractured surroundingrock, underground rivers, material shortagesriverbeds, insufficient blasting materials, and mudslide-related delays, the team's unwavering dedication ensured the tunnel'stransport disruptions caused by sudden mudslides were overcome, ultimately achieving a safe, high-quality, and efficient fullbreakthroughof the tunnel.
