针对我国第一条水下铁路盾构法隧道——狮子洋隧道，采用“多功能盾构隧道结构体试验系统”装置原型管片衬砌结构，在通缝和错缝不同的拼装方式下进行了原型结构加载试验，对其结构力学性能进行深入探讨。试验结果表明，不同水压条件下管片衬砌结构力学特征不同，尤其是当结构开裂后，高水压对于结构内力与形变的发展有明显的减缓作用。狮子洋隧道采用的榫式接头管片结构在通缝与错缝拼装下的破坏特征不同，通缝拼装时结构在高水压条件下纵缝附近区域易发生局部剪切破坏，该研究成果可为同类工程的设计提供有价值的参考。

In view of the first underwater railway shield tunnel, Guangzhou Zhujiang River Shiziyang shield tunnel, the prototype test is carried out against its segmental lining structure by using “Multi function Shield Tunnel Structure Test System”. And the mechanical characteristics of segmental lining structure using straight assembling and staggered assembling are studied deeply. The results show that the mechanical characteristics of segmental lining structure vary from different water pressure. Especially after cracking, the high water pressure plays a significant role in slowing down the growing inner force and deformation. It is also testified that the failure characteristic varies between straight assembling structure and staggered assembling structure. Shear failure often occurs nearby longitudinal seam when using straight assembling.