对某市地铁砂土地质的隧道,利用有限元软件,建立隧道弹塑性数值模型,研究短台阶法施工过程中地表沉降、拱顶沉降和水平收敛的发展规律,通过和施工实测数据对比,调整施工措施和方法,以确保施工安全性,为同类工程提供参考.%In this paper,using finite element software, the tunnel elastoplastic numerical model was set up for sand geology tunnel of a urban metro, and studied the development rules of the ground surface settlement, vault settlement and horizontal convergence in the process of construction of short steps method. Construction measures and methods were adjusted through contrasted construction experimental data, which in order to ensure construction safety and provide a reference for similar projects.
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