基于苏通大桥北主墩运营期的实测数据,对桩身轴力进行分析,进而评价河床防护层对群桩基础承载性能的影响.通过监测数据发现,桩身穿过河床防护层后的轴力及变化幅度均发生大幅衰减,这表明苏通大桥所采用的河床防护层对于提高群桩基础的承载性能和整体稳定性,控制沉降,改善传力机理等方面具有十分重要的意义.%Absract:Based on measured data of the Sutong Bridge's north main pier during operation period, the paper analyzest the axial force of pile body, and then evaluates the effect of bearing capacity of the pile group foundation on the riverbed protective layer. According to the monitoring data, both the axial force and its amplitude of variation weaken sharply after piles pass through the riverbed protective layer. It shows that the riverbed protective layer used by the Sutong Bridge is of great signifi cance in improving bearing capacity and global stability of pile group foundation, controlling settlement and improving force transfer mechanism.
展开▼
