Xin Hua Wang·2025-12-27 05:31Core Viewpoint - The successful opening of the Tiger Mountain Tunnel marks a significant achievement in urban infrastructure, enhancing the connectivity of Qingdao's rapid road network and supporting regional economic development [1] Group 1: Project Details - The Tiger Mountain Tunnel, constructed by China Railway 14th Bureau and funded by Qingdao Urban Investment Group, features a dual-lane, dual-tunnel design with a maximum excavation cross-section exceeding 400 square meters, making it a rare example of a large municipal traffic tunnel in China [1] - The tunnel spans a total length of 1,551 meters, with a maximum excavation width of 31.8 meters and a maximum height of 17.88 meters, resulting in a maximum cross-sectional area of approximately 447.62 square meters, larger than a standard basketball court [1] - During construction, the project faced 18 different excavation cross-section transitions, successfully overcoming challenges related to "multiple cross-section transitions, small clearance construction, and super-large span excavation" [1] Group 2: Impact on Infrastructure - The opening of the Tiger Mountain Tunnel allows for the operational launch of the main line of the Qingdao Tangshan Road Rapid Road Project, which efficiently connects with other major routes such as Chongqing Road and the Qingyin Expressway [1] - This development is expected to enhance the overall road network in Qingdao, facilitating easier travel for citizens and contributing to high-quality regional economic and social development [1]