世界最大直径水下盾构隧道完成黄河段掘进

Core Viewpoint - The world's largest diameter underwater shield tunnel has successfully completed the excavation of the Yellow River section, marking a significant milestone in the construction of this engineering project [1] Group 1: Project Details - The Jinan Huanggang Road Yellow River Tunnel completed the excavation task on June 22, with the assembly of the 1376th ring segment [1] - The project team adapted to the unique geological conditions of the Yellow River basin by increasing the opening rate of the shield machine's cutter head and installing a high-flow central flushing system to prevent mud cake formation [1] - The innovative "flocculation + concentration + pressure filtration" process was employed, allowing for the treatment of nearly 600 cubic meters of waste slurry per hour, improving waste slurry processing efficiency by 50% and reducing the moisture content of the filter cake to below 30% [1] Group 2: Progress and Achievements - The "Shanhe" shield machine has successfully completed the excavation of 1376 rings, totaling 2752 meters, with a construction progress of 83% [1]