深圳城市地下街隧道暗挖施工变形有限元分析

以深圳丰盛町地下阳光街隧道暗挖工程D区为例，采用FLAC-3D建立有限元模型，对地下街隧道暗挖工程施工全过程进行三维数值模拟，研究了开挖过程中周围地表沉降、地下街顶板下沉、底板隆起以及开挖对隧道下部地铁隧道拱顶变形的影响。研究结果可为类似工程的设计、施工提供借鉴和参考。

Finite Element Analysis on Deformation of Undercutting in Shenzhen Urban Underground Street Tunnel

With section D of undercut engineering of Shenzhen Fengshengding Underground Sunshine Street as the example,this paper establishes finite element model with FLAC-3D to conduct 3D numerical simulation for the whole process of undercutting in underground street tunnel so as to study the influence of surface settlement,underground street roof settlement,bottom plate uplift and excavation on underground tunnel roof deformation.The result can be a reference for design and construction of the similar enginnering.