Phase breakthrough: The world’s largest diameter underwater shield tunnel completed excavation of the Yellow River section – Passionategeekz

Passionategeekz June 22, according to Xinhua News Agency, with the assembly of the 1376th ring pipe section, the Huanggang Road Passing Huang Tunnel in Jinan City on June 22Completed smoothlyThe Yellow River section excavation mission, the world’s largest diameter underwater shield tunnel constructionMade a phased breakthrough。

According to Zhou Xiang, senior engineer of China Railway 14th Bureau, in order to more effectively adapt to the unique geological conditions of the Yellow River Basin, the project team effectively prevented the cutter plate from forming mud cake by increasing the opening rate of the shield machine tool and installing a large flow center erosion system; by optimizing the tool configuration, it effectively deals with irregularly distributed calcium nodules; innovatively adopts the combination process of “flocculation + enrichment + filtration compression”,Treat nearly 600 cubic meters of waste slurry per hourthe waste slurry treatment efficiency is improved by 50%, and the moisture content of the filter cake is reduced to below 30%.

Passionategeekz learned from the report that at present, the “Shanhe” shield machine has successfully completed excavation of 1376 rings and 2752 meters.Construction progress reaches 83%。

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