
22日上午,随着盾构机刀盘缓缓转动,天津轨道交通Z4线首台盾构机“泰达号”顺利始发,标志着Z4线全面进入盾构施工阶段。

天津轨道交通Z4线一期工程南起规划中部新城,北至汉沽区,全长43.7公里,共设车站24座,是串接滨海新区南北片区与核心区的骨干线路。本次盾构施工位于金临道站—大沽船厂站区间,全长1024米,是滨海新区首个盾构下穿海河工程,也是我市下穿河流最长的盾构区间,盾构机将先后穿越建筑群、海河以及城市主干道等区域,区间地下水系错综、地质条件复杂,施工难度大。

面对建设中的重难点问题,中建八局项目团队在刀盘结构、刀具类型、密封形式、铰接形式等方面进行了充分研究和设计,量身打造了“泰达号”盾构机。这台国产自主盾构机总长85米,重约550吨,选用具有足够刚度、强度的六辐条复合式重型刀盘,借助3.4米大直径主轴承设计,增大刀盘额定扭矩、提高抗冲击性。
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