软土地层盾构隧道与邻近桩基合理施工顺序研究

软土地层盾构隧道与邻近建筑物会因近接施工使二者之间互相产生附加变形，对隧道及建筑物结构产生不利影响。以温州市域铁路温南区间拟建盾构隧道近接穿越龙湾区瑶溪北片生活区工程为依托，采用二维有限差分数值分析方法对相互邻近区间隧道和建筑物基础在不同建设顺序下引起的结构附加变形和内力进行了研究。计算结果表明:在盾构区间隧道建设完成后，再进行邻近的建筑物基础施工，能相应降低近接施工产生的不利影响，减小附加变形。

Research on the Reasonable Construction Sequence of Shield Tunnel and Adjacent Pile Foundations in Soft Soil Stratum

The shield tunnel and adjacent structures in soft soil stratum will generate additional deformation due to adjacent construction, leading to detrimental effect for each other. Based on the project of shield tunnel from Wenzhou avenue to Nanyang avenue of Wenzhou regional railway crossing Yaoxi northern living area in Longwan District, this paper researches the additional deformation and internal force of shield tunnel and adjacent structures under different construction sequences by adopting two-dimensional finite difference numerical analysis method. The calculated results indicate that building the shield tunnel before the construction of adjacent structure foundations could decrease additional deformation and detrimental effect caused by the adjacent construction.