通过管片拼装点位、拼装规律、楔形量的计算及确定的描述。并对盾构法施工中，管片选型及拼装过程中容易产生问题的各影响因素所进行的分析，总结出管片选型的原则，及管片安装过程中的注意事项，确保成型隧道的质量和使用寿命。

Through the description of the calculation and determination of erection positions, erection rules and wedge and by the analysis of the influencing factors which will affect the segment model selection and erection over shield construction, rules for segment model selection and matters needing attention during segment erection have been summed up, which ensures the quality and service life of the as-built tunnels.