The length of the tunnel is 7,800 meters, of which the sea section is 4,095 meters, ranking first in China¡¯s submarine tunnels and third in the world. It was completed at the end of December 2010 and opened to traffic in June 2011.
Qingdao Jiaozhou Bay Highway Tunnel
Its ¡°Study on Key Technology of Drilling and Explosion Construction of Submarine Tunnel¡± won the second prize of Science and Technology Progress Award of Sichuan Province in 2010 and 2011. The project has obtained a national invention patent, and the patent name is ¡°Combined Grouting Construction Method for Broken Rock and Non-stopping Slurry Wall¡±.