Core Viewpoint - The Wuhan Metro Line 11 Phase IV project has made significant progress with the commencement of tunnel construction between Tangshan Station and the entry-exit line, utilizing advanced tunneling technology to address various engineering challenges [1][5]. Group 1: Project Overview - The total length of the Line 11 Phase IV project is 16.2 kilometers, featuring six stations: Tangshan Station, Sixin Avenue Station, Fangcao Road Station, Meilin Station, North National Expo Center Station, and Jiangguo Road Station [13]. - The construction of the right line tunnel spans 1,735 meters and faces three major technical challenges: shallow burial, steep slopes, and sharp bends [5]. Group 2: Engineering Challenges and Solutions - The minimum burial depth of the tunnel is only 4.4 meters, significantly less than the diameter of the tunneling machine, necessitating multiple protective measures, including a 0.7-meter thick anti-floating reinforced concrete slab on the surface and 40 anti-pull piles on both sides of the tunnel [5]. - The maximum slope of the section reaches 32‰, and the minimum turning radius is 300 meters, which poses high operational demands on the tunneling machine [5]. Group 3: Construction Progress - Another tunneling machine from Tangshan Station has safely advanced 400 meters towards Sixin Avenue Station, navigating through 12 different geological layers, which complicates tunnel axis control [7]. - The left line tunneling machine is expected to complete assembly next week, allowing for simultaneous tunneling of both left and right lines [5][13]. Group 4: Workforce and Expertise - A total of three tunneling machines will be deployed from Tangshan Station, supported by a team of 120 personnel with an average experience of five years, including a core group of "post-80s" assembly workers and "post-90s" operators [9].