叙述了双圆隧道管片的型式和组成、管片材料的主要技术要求、精度要求及与单圆管片在结构和制作上的区别等;重点介绍了双圆管片制造的工艺及技术;通过对管片制作质量的检验,表明其整体质量已超过了日本同类产品标准。 The type and composition of the double round tunnel segment, the main technical requirements, the precision requirements and the differences between the double circle tunnel segment and the single circle segment are described. The manufacturing technology and technology of double round segment are introduced emphatically. Through the inspection of the production quality of the segment, it shows that its overall quality has surpassed that of similar products in Japan.