SDHS(SH:600350) Qi Lu Wan Bao·2025-06-06 06:56Core Viewpoint - The construction of the Jinan Tunnel, part of the Jinan Ring Expressway expansion project, has officially entered a substantial construction phase, marking a significant milestone in highway infrastructure development in China [1][4]. Group 1: Project Overview - The Jinan Tunnel is the first in China's expressway sector to adopt an in-situ expansion construction method, which has strong demonstration significance [1]. - The project spans 34.324 kilometers and features a dual eight-lane design with a speed limit of 120 kilometers per hour [4]. Group 2: Environmental Considerations - The project is located within an ecological protection red line area, and measures have been taken to minimize the impact on the surrounding environment by limiting construction to the tunnel entrance area [4]. - The tunnel will include a light shielding canopy at the entrance and an upgraded lighting system inside, significantly enhancing driving safety and comfort [4]. Group 3: Construction Methodology - The project team has opted for blasting construction techniques after a comprehensive geological assessment, despite the proximity of tunnel structures, which poses risks to existing rock and structures [4]. - A fully closed traffic organization method will be implemented during blasting to ensure safety, as opposed to a non-blasting method that would extend the construction period to 7 years, exceeding the approved 3-year timeline [4]. Group 4: Technological Integration - An integrated intelligent construction platform has been established to enhance construction efficiency and safety management, incorporating geological forecasting, monitoring, testing, and construction control [4].