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China Completes World's Largest Underwater Shield Tunnel

3/21/2026

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Summary

Story summary

The upper deck of the Yellow River tunnel in Jinan, Shandong province, China, has been completed.
The tunnel is the world's largest-diameter underwater shield tunnel, spans 5.75 kilometers, and has six lanes across two levels.
It is China's first single-bore, double-deck shield tunnel beneath the Yellow River.
Secondary structural works are required to finish the interior.

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Story summary

The upper deck of the Yellow River tunnel in Jinan, Shandong province, China, has been completed.
The tunnel is the world's largest-diameter underwater shield tunnel, spans 5.75 kilometers, and has six lanes across two levels.
It is China's first single-bore, double-deck shield tunnel beneath the Yellow River.
Secondary structural works are required to finish the interior.