通过实际的经验总结和大量的研究结果，在对隧道衬砌混凝土非结构性裂缝进行分类整理的基础上，充分考虑原材料和配合比、环境和气候条件、施工工艺和设计原因等因素，结合5种常见裂缝的成因，分析了隧道衬砌非结构性裂缝的成因。提出的相应防治对策、介绍的裂缝控制工程实例，对隧道衬砌结构的设计和施工具有借鉴作用。

 Based on practical experience and study results, the authors make classification of the nonstructural cracks of tunnel concrete lining. The authors analyze the causes for nonstructural cracks of tunnel concrete lining, taking the raw materials and their mixing ratio, environment and climate conditions, construction techniques and design into full consideration. The countermeasures and case studies of tunnel lining crack control presented in this paper can provide reference for the design and construction of tunnel lining structures in the future.