Authors: Fang Zhibin, Zhou Jun
On October 22, at a depth of 42 meters below sea level on the Zhoushan side of the Jintang Undersea Tunnel for the Ningbo-Zhoushan Railway, the “Dinghai” shield tunneling machine successfully crossed the sea dike, marking the transition from land excavation to marine construction. This milestone signifies the start of the “journey under the sea” for this undersea high-speed rail tunnel.