盾构施工诱发地表沉降变形影响因素研究

Research and Analysis on factors influencing ground settlement and deformation induced by shield construction

为研究盾构施工过程中诱发地表沉降变形的影响因素,以南宁地铁1号线为研究对象,将监测数据曲线与Peck公式拟合曲线对比,总结并分析地表沉降变形规律及影响因素。结果表明:Peck公式拟合曲线与实测曲线基本吻合,盾构施工过程中诱发地表沉降变形的主要因素为地层条件和盾构速率;次要影响因素为盾构掘进参数、掌子面稳定性及周边环境影响。研究结果对类似地层中的盾构隧道施工具有指导意义。

In order to study the influencing factors of ground settlement deformation induced by shield construction,a section of Nanning Metro Line 1 is taken as the research object.By comparing the monitoring data curve with the fitting curve of Peck formula,the deformation law of surface subsidence is summarized and the influencing factors of induced deformation are analyzed.The results show that the fitting curve of Peck formula is basically consistent with the measured curve,and the main factors inducing ground settlement deformation during shield construction are stratum conditions and shield speed.The secondary conditions are the shield tunneling parameters except the shield tunneling rate,the stability of the tunnel face and the surrounding environment.The research results of this paper have guiding significance for shield tunnel construction in similar strata.