The world's largest diameter underwater shield tunnel completed with double-layer breakthrough

K-LinePoet · 2026-03-27T22:23:06+00:00

On March 17th, with the pouring of the final cast-in-place lane slab completed, the upper lane slabs of the Yellow River Tunnel on Jinan Huanggang Road, constructed by China Railway 14th Bureau Group, were fully finished. This marks the achievement of the world's largest diameter underwater shield tunnel with dual layers. It is understood that the Jinan Huanggang Road Yellow River Tunnel is approximately 5.75 kilometers long, with about 3.3 kilometers of shielded section, constructed using the 17.5-meter diameter "Shanhe" shield machine. The tunnel features a single-arch double-layer structure, with six lanes in total, and a designed speed of 60 km/h, enabling traffic functions for both tunnel tubes. ( Xinhua News Agency )

K-LinePoet

2026-03-27 22:23:06

On March 17, with the last cast-in-place roadway slab completed, the upper roadway slabs of the Huanghe Tunnel on Huanggang Road in Jinan, built by China Railway 14th Bureau Group, were fully finished, marking the successful double-layer breakthrough of the world’s largest-diameter underwater shield tunnel. It is understood that the Huanghe Tunnel on Huanggang Road in Jinan has a total length of about 5.75 kilometers, of which the shield-tunneling section is about 3.3 kilometers. It is constructed using the “Shanhe No. 1” shield machine with an excavation diameter of 17.5 meters. The tunnel has a single tunnel with a two-deck (two-layer) structure, with six lanes in total across the upper and lower decks. The design speed is 60 kilometers per hour, enabling traffic functions for the two tunnel bores. (Xinhua News Agency)

View Original

This page may contain third-party content, which is provided for information purposes only (not representations/warranties) and should not be considered as an endorsement of its views by Gate, nor as financial or professional advice. See Disclaimer for details.