5月15日，随着洞门凿除工作的全部完成，南通地铁2号线07标五一路东站~青年路站区间左线盾构正式始发，这标志着2号线07标区间工程最后一个单线隧道掘进拉开了帷幕。
五一路东站~青年路站左线区间全长658.21米，开挖直径6.41米。本次盾构始发采用“水泥土加固+垂直冻结加固+短套箱+降水井辅助降水”多道保险措施的综合始发工艺，盾构始发及穿越冻结区为本次施工的重难点，区间沿途下穿学田河、张家桥箱涵、江苏工院过街通道等风险源，地质条件复杂、周边建筑较多，盾构施工安全风险高、难度大。
为了盾构施工安全，项目部全体职工精心策划、全程控制，多次组织专家、参建各方对施工方案进行论证，优化盾构始发和接收专项施工方案和应急预案，同时充分认识到水文地质的特性及做好各项监控量测工作，最大程度减少盾构机在复杂地层始发、掘进和接收的安全风险，确保了此次盾构顺利始发。
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