盾构隧道管片上浮问题研究

盾构隧道施工过程中衬砌管片上浮问题是客观存在的，且一直是较难解决的问题之一，而大直径盾构隧道的上浮问题表现的更为突出。应用有限元法，对地层材料的物理力学性质、注浆材料的性质等影响盾构衬砌环上浮的因素进行了分析。根据分析结果，结合对衬砌结构在施工过程中受力状态的分析，对衬砌环上浮的原因进行了阐述，据此针对大直径盾构隧道的特点，提出了施工、设计过程中控制衬砌管片上浮的对策和措施，可为盾构隧道的施工和设计提供参考。

Research on upward moving of segments of shield tunel

Engineering practice shows that it is an objective problem of upward moving of tunnel segments in the construction process, especially in the large-diameter shield tunnel , which is difficult to solve. The factors affecting the upward moving of shield tunnel lining is analyzed by finite element method(FEM), such as the physico-mechanical properties of stratum material , and the properties of grouting material. According to the finite element analysis results and the state of the lining structure in the construction process, the reasons for the upward moving of shield tunnel segments are expounded. Based on the characteristics of large-diameter shield tunnel , the policies and measures are put forward to control the upward moving of shield tunnel segments in the construction process, which can provide some reference to the design and construction of the shield tunnel.