盾构隧道壁后注浆对地表沉降影响数值模拟研究

摘要

论文针对上海地铁2号线工程,采用三维数值模拟软件FLA3D对盾构隧道开挖后壁后注浆对地表沉降影响进行了模拟计算与实测数据的对比分析研究.研究揭示了注浆长期强度和注浆浆液时间-强度变化对地表沉降的影响规律,所得结论可供盾构隧道设计与施工参考使用.%For the Shanghai Metro Line 2 project, using three-dimensional numerical simulation software FLAC3D the impact of surface subsidence of the shield tunnel excavation and the posterior grouting was simulated and comparatively analyzed with measured data. Research reveals the law of surface subsidence for the long-term strength and grouting time -intensity change. The conclusion could be used and referenced for the design and construction of shield tunnel.