软土地层盾构施工地表沉降分析及控制措施

摘要

通过对上海地铁软土地层盾构施工引起的地层变形原因和机理进行分析,结合派克公式对地层变形进行计算,引出地层损失率作为沉降控制标准,并提出了软土地层盾构施工地层损失控制技术要点,以减小施工对环境的影响。%Through analyzing ground deformation causes and mechanism in soft ground shielding of Shanghai subway,combining with Pike formula,the paper calculates ground deformation,takes ground loss rate as subsidence control criterior,and finally puts forward ground loss controlling points in soft ground shielding,so as to reduce the impacts of construction upon the environment.