中文摘要：

基于盾构隧道横向刚度有效率的定义,推导根据管片纵缝接头刚度解析通缝拼装盾构隧道横向刚度有效率的计算公式,并以实例验证该计算公式的可行性。通过反演分析结果,阐明隧道所处地层的土体力学性能和隧道埋深对盾构隧道横向刚度有效率的影响机制。利用该计算公式分析多个单因素对横向刚度有效率的影响。结果表明：管片环的直径越大,盾构隧道的横向刚度有效率越大;管片截面的抗弯刚度越大、管片纵缝接头刚度越小、管片环分块数量越多,盾构隧道横向刚度有效率越小;盾构隧道横向刚度有效率不仅表征了管片纵缝接头对隧道横向刚度削弱的程度,也反映了管片纵缝接头转动变形而导致的管片环横向变形所占管片环横向总变形的比例,此比例越大,盾构隧道横向刚度有效率越小;反之亦然。

英文摘要：

Based on the definition of transverse effective rigidity ratio for shield-driven tunnel, the analytical formula of transverse effective rigidity ratio for shield-driven tunnel with straight joint was deduced according to the longitudinal joint stiffness of segment, and the feasibility of the formula was verified by an example. Through the results of back analysis, the influence mechanism of the mechanical properties of soil and tunnel buried depth on the transverse effective rigidity ratio of shield-driven tunnel was clarified. Based on the analytical formula, the influence of multiple factors on transverse effective rigidity ratio was analyzed. Results show that the larger the diameter of segment ring, the greater the transverse effective rigidity ratio of shield-driven tunnel. The larger the bending rigidity of segment section, the smaller the longitudinal joint stiffness of segment and the more the number of segment ring will lead to the smaller the transverse effective rigidity ratio of shield-driven tunnel. The transverse effective rigidity ratio of shield- driven tunnel not only represents the weakened degree of transverse rigidity of tunnel by segment longitu- dinal joints, but also reflects the proportion of the transverse deformation of segment ring which caused by the rotational deformation of segment longitudinal joints to the total transverse deformation of segment ring. The larger the proportion, the smaller the transverse effective rigidity ratio of shield-driven tunnel, and vice versa.