为探究盾构施工过程中不同地质条件与注浆作用对盾构隧道管片变形的影响规律，依托地质条件复杂的珠江三角洲某盾构隧道工程，采用在空间分辨率及传感精度方面具有显著优势的光频域反射（OFDR）分布式光纤传感技术，进行不同空间位置与不同地质条件下隧道管片的监测研究。其中，监测环选取位于破碎带外的1 529环、1 538环及破碎带内的1 551环，传感光纤沿隧道管片钢筋笼纵筋布设。研究表明： 1) 注浆对隧道管片的变形影响十分显著，同步注浆后管片发生的变形是二次注浆后管片变形的3倍。2) 不同地质条件下管片变形差异性明显，破碎带内管片相对于破碎带外管片的变形较大且不稳定； 当隧道管片进入到完整的岩层内部，管片变形相对稳定。3) 破碎带内的管片变形是破碎带外的管片变形的2.6倍。

A case study is conducted on a shield tunnel project in the Pearl River Delta having complex geological conditions to investigate the influence of different geological conditions and grouting effects on the deformation of shield tunnel segments during shield tunneling. Furthermore, tunnel segments at various spatial locations and under different geological conditions are monitored using distributed fiber optic sensing based on optical frequency domain reflectometry, which has significant advantages in spatial resolution and sensing accuracy. The selected ring Nos.1 529 and 1 538 are outside the fracture zone, but ring No. 1 551 is inside the fracture zone; moreover, the sensing optical fiber is arranged along the longitudinal reinforcement of the tunnel segment reinforcement cage. The results reveal the following: (1) Grouting has a significant effect on the deformation of tunnel segments, and deformation after synchronous grouting is three times that after secondary grouting. (2) The deformation of segments varies under various geological conditions, and it is relatively large and unstable in the fracture zone compared with that outside; When the tunnel segments enter the complete rock stratum, the deformation of segments is relatively stable. (3) The deformation of segments in the fracture zone is 2.6 times that outside the fracture zone.