On February 17th, TBM “Shuangjing No.1” with an excavation diameter of 4.48m left the production line at the second industrial park of the China Railway Construction Heavy Industry Corporation Limited (CRCHI) in Changsha. It will be applied for the construction of the diversion tunnel at the Tina Hydropower Station in the Solomon Islands. This marks the first export of a Chinese-made TBM to the Solomon Islands, says CRCHI.
The Tina Hydropower Station diversion tunnel in the Solomon Islands spans approximately 3.2km, primarily passing through gravel and sandstone strata. The project will encounter several engineering challenges, including a long-distance tunnel drive, crossing fractured zones, and high-pressure water conditions during excavation.
To address these challenges, the development team has implemented several targeted designs. These include a composite cutterhead created for hard rock strata, substantial reserves of thrust and torque, an integrated pressurized manlock, intensive back-up support, and an advanced geological prediction system. These features enhance the shield machine’s robust adaptability to various geological conditions, the company adds.
The Tina Hydropower Station, located in the Malango region of Guadalcanal Province in the Solomon Islands, is the largest hydropower project currently under construction in the islands. As a landmark infrastructure project, upon completion, the Tina Hydropower Station will meet 68% of the electricity demand of the capital city Honiar, benefiting over 100,000 residents and promoting local economic and social development.
CRCHI
Established in 2007 and subordinate to China Railway Construction Corporation Limited, China Railway Construction Heavy Industry Corporation Limited (CRCHI) is a...
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