Shenzhen Chunfeng Tunnel is one of the shield tunnels under construction with the largest diameter in mainland of China. The whole tunnel passes through the coastal composite stratum, with rock from broken to integral, and the strength of some sections reaches 173 MPa. The tunnel undercrosses the railway, subway, bridge and multiple buildings closely in a complex and sensitive environment. Combining the stratum situation and characteristics of largediameter shield machine, the problems that will be faced during the construction process, including low rock breaking efficiency of shield machine, discharge stagnation and jamming of the chamber, settlement control in sensitive environment, and impact of largediameter shield segment floating, cracking and construction on urban traffic, are analyzed. Based on the engineering experience, the following solutions are proposed: a shield rock breaking efficiency solution for the complete extremely hard rock section, settlement control measures for adjacent buildings and structures of shielddriven tunnels, solutions for jamming and discharge stagnation of large diameter slurry shield, comprehensive measures for prevention and control of shield segment floating and cracking, and a slag treatment plan for downtown areas. Chunfeng Tunnel tests the wisdom of Chinese builders with its tremendous volume and strict construction standards, and it also has certain reference significance for other similar projects.

深圳春风隧道为中国大陆在建最大直径盾构隧道之一，全隧穿越滨海复合地层，岩体破碎至完整，部分地段岩石强度达到173 MPa，隧道近距离下穿铁路、地铁、桥梁及多栋建筑物，环境复杂敏感。文章结合本工程地层情况和大直径盾构自身特性，梳理施工过程中将会面对的盾构破岩效率低、破碎岩体堵舱滞排、敏感环境沉降控制、大直径盾构管片上浮开裂、施工对城市交通影响等问题，并结合工程经验提出完整极硬岩段的盾构破岩效率解决方案、盾构下穿建（构）筑物沉降控制措施、大直径泥水盾构堵舱滞排解决方案、管片上浮开裂防治综合措施以及繁华城区碴土处理方案。春风隧道以超大的体量、超高的建设标准考验着中国建设者的智慧，也对其他类似工程具有一定的借鉴意义。