The intra-terminal tunnels will transfer passengers and baggage.
A series of sub-tunnels will also be built for an automated people mover, baggage handling and utilities.
The JV will also construct a ventilation building and preliminary work for a future underground infrastructure tunnel.
Ong Chee Chiau, Changi Airport Group’s managing director for Changi East, said: “The award of the T5’s intra-terminal tunnel works marks another important development in the construction of T5 and the wider Changi East project.
“These tunnels will enable the smooth and efficient movement of passengers, baggage and services.”
Ground broke on terminal five last month, it has been delayed since 2020 due to Covid-19.
Tunnelling work is due to be completed in 2029.
Subscribe here to get stories about construction around the world in your inbox three times a weekFurther Reading:
Singapore finally starts work on $3.5bn Terminal 5 Heatherwick and Kohn Pedersen Fox redesign Changi’s Terminal 5 as “airport city”Japanese-Singapore team to build tunnels under Changi T5 Global Construction Review.
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