This paper studies the force and deformation of the connecting channel in Ningbo rail transit construction, which firstly used the mechanical shield method. Steel-concrete composite structural segments are used in the T-joint of connecting channel. The cutting part of the segments are replaced by the concrete and fiberglass instead of reinforced concrete. Basing on a variety of three-dimensional design software and ABAQUS finite element analysis software, a refined finite element analysis model of the special segments is established. By considering the influence of curved joint bolts, the force analysis of the special segments under the structural state before and after construction is performed. According to the analysis and comparison of the deformation of the segments with and without the bolts, it is concluded that the steel-concrete segments can withstand the pressure of the soil before and after the construction. Suggestions for the safety of the design and construction of the segments are put forward.

本文首先采用机械屏蔽法研究了宁波轨道交通建设中连接通道的受力和变形。连接通道的T型接头采用钢混混凝土结构段。段的切割部分被混凝土和玻璃纤维代替，而不是钢筋混凝土。以各种三维设计软件和ABAQUS有限元分析软件为基础，建立了细化段的有限元分析模型。通过考虑弯头螺栓的影响，对特殊节段在施工前后的结构状态进行了力分析。根据带和不带螺栓的节段变形的分析和比较，得出的结论是，钢混凝土段可以承受施工前后的土壤压力。提出了对路段设计和施工安全的建议。