预制装配式地下车站结构施工阶段力学行为分析

为确保预制装配式地下车站结构在施工过程中的安全与稳定，了解预制装配式地下车站结构施工阶段的力学规律，以长春地铁2号线捷达大路站装配式车站为工程背景，通过数值模拟和现场实测相结合的方式，对预制装配式地下车站结构的施工全过程展开分析。研究结果表明： 1）顶部回填和水位恢复2个阶段对结构内力和变形影响较大； 2）丝杠设置、混凝土分层回填等特殊施工节点对拼装成环和侧壁回填阶段结构的内力和变形有较大影响； 3）通过将数值计算结果与现场实测结果进行对比分析，验证了模型分析的可靠性。

Mechanical Behavior of Prefabricated Underground Station Structure in Construction Stage

A case study of a Changchun metro prefabricated station is undertaken to ensure the safety and stability of prefabricated station structures during the construction process, and to research the mechanical law of the prefabricated underground station structures during the construction stage. The entire construction process of the prefabricated underground structure is analyzed using numerical simulation and field measurement, and the results show the following. (1) The internal force and deformation of the structure are significantly affected by the two stages of top backfilling and water level recovery. (2) Some special construction nodes, such as lead screw setting and concrete layered backfilling, have a more significant impact on the internal force and deformation of the structure during the ring assembly and sidewall backfilling stages. (3) The numerical analysis results are compared with the field measured results, and the comparisons show that the model analysis is reliable.