Subject to China's complex and ever-changing geological environment, natural climate conditions and the level of tunnel construction and management and maintenance, lining cracking is one of the most frequent diseases during the operation of expressway tunnel. The distribution rule of cracks is obtained by making statistics of random lining cracks at different parts of expressway tunnels. A study is also conducted on the external conditions such as surrounding rocks of expressway entrance & exit and structural types, together with design method and construction technology, discussing the mechanism of lining cracks and systematically analyzing the causes of lining cracks. Based on the years of engineering practice of tunnel lining repairing in China, treatment measures and the applicable conditions are respectively given for both the crack without water and that containing water.%受制于我国复杂多变的地质环境、自然气候条件与隧道建造管养水平,衬砌开裂是最为常见的公路隧道运营病害之一.对运营公路隧道随机衬砌裂缝进行统计,得出不同部位裂缝分布规律.从公路隧道进出口围岩条件、结构型式等外部条件与设计方法、施工工艺等技术措施2方面因素,探讨公路隧道裂损机理,且对衬砌裂缝成因进行系统分析,并从我国隧道衬砌修复多年的工程实践出发,给出无水、有水2类裂缝的分类工程处治对策及其适用条件.
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